Remove contact as a supported object type in EPP (#2932)

This primarily affects the EPP greeting. We already were erroring out when any
contact flows attempted to be run; this should just prevent registrars from even
trying them at all.

This PR is designed to be minimally invasive, and does not remove any of the
contact flows or Jakarta XML/XJC objects/files themselves. That can be done
later as a follow-up.

Also note that the contact namespace urn:ietf:params:xml:ns:contact-1.0 is still
present for now in RDE exports, but I'll remove that subsequently as well.

BUG= http://b/475506288

core/src/main/java/google/registry/beam/rde/RdePipeline.java

@@ -184,10 +184,10 @@ public class RdePipeline implements Serializable {
   private final CloudTasksUtils cloudTasksUtils;
   private final RdeMarshaller marshaller;
 
-  // Registrars to be excluded from data escrow. Not including the sandbox-only OTE type so that
-  // if sneaks into production we would get an extra signal.
+  // Registrars to be excluded from data escrow (i.e. all registrar types that have a null IANA
+  // identifier and thus would not be valid according to the RDE schema).
   private static final ImmutableSet<Type> IGNORED_REGISTRAR_TYPES =
-      Sets.immutableEnumSet(Registrar.Type.MONITORING, Registrar.Type.TEST);
+      Sets.immutableEnumSet(Registrar.Type.MONITORING, Registrar.Type.OTE, Registrar.Type.TEST);
 
   private static final FluentLogger logger = FluentLogger.forEnclosingClass();
 

core/src/main/java/google/registry/config/RegistryConfig.java

@@ -1462,6 +1462,12 @@ public final class RegistryConfig {
       return ImmutableSet.copyOf(config.mosapi.services);
     }
 
+    @Provides
+    @Config("mosapiTldThreadCnt")
+    public static int provideMosapiTldThreads(RegistryConfigSettings config) {
+      return config.mosapi.tldThreadCnt;
+    }
+
     private static String formatComments(String text) {
       return Splitter.on('\n').omitEmptyStrings().trimResults().splitToList(text).stream()
           .map(s -> "# " + s)

core/src/main/java/google/registry/config/RegistryConfigSettings.java

@@ -272,5 +272,6 @@ public class RegistryConfigSettings {
     public String entityType;
     public List<String> tlds;
     public List<String> services;
+    public int tldThreadCnt;
   }
 }

core/src/main/java/google/registry/config/files/default-config.yaml

@@ -642,4 +642,8 @@ mosapi:
   - "epp"
   - "dnssec"
 
+  # Provides a fixed thread pool for parallel TLD processing.
+  # @see <a href="https://www.icann.org/mosapi-specification.pdf">
+  # ICANN MoSAPI Specification, Section 12.3</a>
+  tldThreadCnt: 4
 

core/src/main/java/google/registry/flows/ResourceFlowUtils.java

@@ -194,13 +194,27 @@ public final class ResourceFlowUtils {
     }
   }
 
-  /** Check that the same values aren't being added and removed in an update command. */
-  public static void checkSameValuesNotAddedAndRemoved(
-      ImmutableSet<?> fieldsToAdd, ImmutableSet<?> fieldsToRemove)
-      throws AddRemoveSameValueException {
+  /**
+   * Verifies the adds and removes on a resource.
+   *
+   * <p>This throws an exception in three different situations: if the same value is being both
+   * added and removed, if a value is being added that is already present, or if a value is being
+   * removed that isn't present.
+   */
+  public static <T> void verifyAddsAndRemoves(
+      ImmutableSet<T> existingFields, ImmutableSet<T> fieldsToAdd, ImmutableSet<T> fieldsToRemove)
+      throws AddRemoveSameValueException,
+          AddExistingValueException,
+          RemoveNonexistentValueException {
     if (!intersection(fieldsToAdd, fieldsToRemove).isEmpty()) {
       throw new AddRemoveSameValueException();
     }
+    if (!intersection(fieldsToAdd, existingFields).isEmpty()) {
+      throw new AddExistingValueException();
+    }
+    if (intersection(fieldsToRemove, existingFields).size() != fieldsToRemove.size()) {
+      throw new RemoveNonexistentValueException();
+    }
   }
 
   /** Check that all {@link StatusValue} objects in a set are client-settable. */
@@ -266,6 +280,20 @@ public final class ResourceFlowUtils {
     }
   }
 
+  /** Cannot add a value that is already present. */
+  public static class AddExistingValueException extends ParameterValuePolicyErrorException {
+    public AddExistingValueException() {
+      super("Cannot add a value that is already present");
+    }
+  }
+
+  /** Cannot remove a value that does not exist. */
+  public static class RemoveNonexistentValueException extends ParameterValuePolicyErrorException {
+    public RemoveNonexistentValueException() {
+      super("Cannot remove a value that does not exist");
+    }
+  }
+
   /** The specified status value cannot be set by clients. */
   public static class StatusNotClientSettableException extends ParameterValueRangeErrorException {
     public StatusNotClientSettableException(String statusValue) {

core/src/main/java/google/registry/flows/domain/DomainCheckFlow.java

@@ -88,6 +88,7 @@ import java.util.Map;
 import java.util.Optional;
 import java.util.Set;
 import java.util.stream.Collectors;
+import org.joda.money.CurrencyUnit;
 import org.joda.time.DateTime;
 
 /**
@@ -298,11 +299,13 @@ public final class DomainCheckFlow implements TransactionalFlow {
 
     boolean shouldUseTieredPricingPromotion =
         RegistryConfig.getTieredPricingPromotionRegistrarIds().contains(registrarId);
+    ImmutableSet.Builder<CurrencyUnit> currenciesBuilder = new ImmutableSet.Builder<>();
     for (FeeCheckCommandExtensionItem feeCheckItem : feeCheck.getItems()) {
       for (String domainName : getDomainNamesToCheckForFee(feeCheckItem, domainNames.keySet())) {
         FeeCheckResponseExtensionItem.Builder<?> builder = feeCheckItem.createResponseBuilder();
         Optional<Domain> domain = Optional.ofNullable(domainObjs.get(domainName));
         Tld tld = Tld.get(domainNames.get(domainName).parent().toString());
+        currenciesBuilder.add(tld.getCurrency());
         Optional<AllocationToken> token;
         try {
           // The precise token to use for this fee request may vary based on the domain or even the
@@ -385,7 +388,8 @@ public final class DomainCheckFlow implements TransactionalFlow {
         responseItems.add(builder.setDomainNameIfSupported(domainName).build());
       }
     }
-    return ImmutableList.of(feeCheck.createResponse(responseItems.build()));
+    return ImmutableList.of(
+        feeCheck.createResponse(responseItems.build(), currenciesBuilder.build()));
   }
 
   /**

core/src/main/java/google/registry/flows/domain/DomainFlowUtils.java

@@ -976,23 +976,21 @@ public class DomainFlowUtils {
       throw new UrgentAttributeNotSupportedException();
     }
     // There must be at least one of add/rem/chg, and chg isn't actually supported.
-    if (secDnsUpdate.getChange() != null) {
+    if (secDnsUpdate.getChange().isPresent()) {
       // The only thing you can change is maxSigLife, and we don't support that at all.
       throw new MaxSigLifeChangeNotSupportedException();
     }
-    Add add = secDnsUpdate.getAdd();
-    Remove remove = secDnsUpdate.getRemove();
-    if (add == null && remove == null) {
+    Optional<Add> add = secDnsUpdate.getAdd();
+    Optional<Remove> remove = secDnsUpdate.getRemove();
+    if (add.isEmpty() && remove.isEmpty()) {
       throw new EmptySecDnsUpdateException();
     }
-    if (remove != null && Boolean.FALSE.equals(remove.getAll())) {
+    if (remove.isPresent() && Boolean.FALSE.equals(remove.get().getAll())) {
       throw new SecDnsAllUsageException(); // Explicit all=false is meaningless.
     }
-    Set<DomainDsData> toAdd = (add == null) ? ImmutableSet.of() : add.getDsData();
+    Set<DomainDsData> toAdd = add.map(Add::getDsData).orElse(ImmutableSet.of());
     Set<DomainDsData> toRemove =
-        (remove == null)
-            ? ImmutableSet.of()
-            : (remove.getAll() == null) ? remove.getDsData() : oldDsData;
+        remove.map(r -> (r.getAll() == null) ? r.getDsData() : oldDsData).orElse(ImmutableSet.of());
     // RFC 5910 specifies that removes are processed before adds.
     return ImmutableSet.copyOf(union(difference(oldDsData, toRemove), toAdd));
   }

core/src/main/java/google/registry/flows/domain/DomainUpdateFlow.java

@@ -21,8 +21,8 @@ import static com.google.common.collect.Sets.union;
 import static google.registry.dns.DnsUtils.requestDomainDnsRefresh;
 import static google.registry.flows.FlowUtils.persistEntityChanges;
 import static google.registry.flows.FlowUtils.validateRegistrarIsLoggedIn;
-import static google.registry.flows.ResourceFlowUtils.checkSameValuesNotAddedAndRemoved;
 import static google.registry.flows.ResourceFlowUtils.loadAndVerifyExistence;
+import static google.registry.flows.ResourceFlowUtils.verifyAddsAndRemoves;
 import static google.registry.flows.ResourceFlowUtils.verifyAllStatusesAreClientSettable;
 import static google.registry.flows.ResourceFlowUtils.verifyNoDisallowedStatuses;
 import static google.registry.flows.ResourceFlowUtils.verifyOptionalAuthInfo;
@@ -75,6 +75,8 @@ import google.registry.model.domain.fee.FeeUpdateCommandExtension;
 import google.registry.model.domain.metadata.MetadataExtension;
 import google.registry.model.domain.secdns.DomainDsData;
 import google.registry.model.domain.secdns.SecDnsUpdateExtension;
+import google.registry.model.domain.secdns.SecDnsUpdateExtension.Add;
+import google.registry.model.domain.secdns.SecDnsUpdateExtension.Remove;
 import google.registry.model.domain.superuser.DomainUpdateSuperuserExtension;
 import google.registry.model.eppcommon.AuthInfo;
 import google.registry.model.eppcommon.StatusValue;
@@ -245,12 +247,19 @@ public final class DomainUpdateFlow implements MutatingFlow {
   private Domain performUpdate(Update command, Domain domain, DateTime now) throws EppException {
     AddRemove add = command.getInnerAdd();
     AddRemove remove = command.getInnerRemove();
-    checkSameValuesNotAddedAndRemoved(add.getNameservers(), remove.getNameservers());
-    checkSameValuesNotAddedAndRemoved(add.getContacts(), remove.getContacts());
-    checkSameValuesNotAddedAndRemoved(add.getStatusValues(), remove.getStatusValues());
-    Change change = command.getInnerChange();
     Optional<SecDnsUpdateExtension> secDnsUpdate =
         eppInput.getSingleExtension(SecDnsUpdateExtension.class);
+    verifyAddsAndRemoves(domain.getNameservers(), add.getNameservers(), remove.getNameservers());
+    verifyAddsAndRemoves(domain.getContacts(), add.getContacts(), remove.getContacts());
+    verifyAddsAndRemoves(domain.getStatusValues(), add.getStatusValues(), remove.getStatusValues());
+    if (secDnsUpdate.isPresent()) {
+      SecDnsUpdateExtension ext = secDnsUpdate.get();
+      verifyAddsAndRemoves(
+          domain.getDsData(),
+          ext.getAdd().map(Add::getDsData).orElse(ImmutableSet.of()),
+          ext.getRemove().map(Remove::getDsData).orElse(ImmutableSet.of()));
+    }
+    Change change = command.getInnerChange();
 
     // We have to verify no duplicate contacts _before_ constructing the domain because it is
     // illegal to construct a domain with duplicate contacts.

core/src/main/java/google/registry/flows/host/HostCreateFlow.java

@@ -116,6 +116,7 @@ public final class HostCreateFlow implements MutatingFlow {
           ? new SubordinateHostMustHaveIpException()
           : new UnexpectedExternalHostIpException();
     }
+    HostFlowUtils.validateInetAddresses(command.getInetAddresses());
     Host newHost =
         new Host.Builder()
             .setCreationRegistrarId(registrarId)

core/src/main/java/google/registry/flows/host/HostFlowUtils.java

@@ -22,6 +22,7 @@ import static java.util.stream.Collectors.joining;
 
 import com.google.common.base.Ascii;
 import com.google.common.base.CharMatcher;
+import com.google.common.collect.ImmutableSet;
 import com.google.common.net.InternetDomainName;
 import google.registry.flows.EppException;
 import google.registry.flows.EppException.AuthorizationErrorException;
@@ -34,6 +35,7 @@ import google.registry.model.ForeignKeyUtils;
 import google.registry.model.domain.Domain;
 import google.registry.model.eppcommon.StatusValue;
 import google.registry.util.Idn;
+import java.net.InetAddress;
 import java.util.Optional;
 import org.joda.time.DateTime;
 
@@ -108,6 +110,24 @@ public class HostFlowUtils {
     return superordinateDomain;
   }
 
+  /** Makes sure that no provided IP addresses are local / loopback addresses. */
+  public static void validateInetAddresses(ImmutableSet<InetAddress> inetAddresses)
+      throws EppException {
+    if (inetAddresses == null) {
+      return;
+    }
+    if (inetAddresses.stream().anyMatch(InetAddress::isLoopbackAddress)) {
+      throw new LoopbackIpNotValidForHostException();
+    }
+  }
+
+  /** Loopback IPs are not valid for hosts. */
+  static class LoopbackIpNotValidForHostException extends ParameterValuePolicyErrorException {
+    public LoopbackIpNotValidForHostException() {
+      super("Loopback IPs are not valid for hosts");
+    }
+  }
+
   /** Superordinate domain for this hostname does not exist. */
   static class SuperordinateDomainDoesNotExistException extends ObjectDoesNotExistException {
     public SuperordinateDomainDoesNotExistException(String domainName) {

core/src/main/java/google/registry/flows/host/HostUpdateFlow.java

@@ -20,8 +20,8 @@ import static google.registry.dns.DnsUtils.requestHostDnsRefresh;
 import static google.registry.dns.RefreshDnsOnHostRenameAction.PARAM_HOST_KEY;
 import static google.registry.dns.RefreshDnsOnHostRenameAction.QUEUE_HOST_RENAME;
 import static google.registry.flows.FlowUtils.validateRegistrarIsLoggedIn;
-import static google.registry.flows.ResourceFlowUtils.checkSameValuesNotAddedAndRemoved;
 import static google.registry.flows.ResourceFlowUtils.loadAndVerifyExistence;
+import static google.registry.flows.ResourceFlowUtils.verifyAddsAndRemoves;
 import static google.registry.flows.ResourceFlowUtils.verifyAllStatusesAreClientSettable;
 import static google.registry.flows.ResourceFlowUtils.verifyNoDisallowedStatuses;
 import static google.registry.flows.ResourceFlowUtils.verifyResourceOwnership;
@@ -159,8 +159,11 @@ public final class HostUpdateFlow implements MutatingFlow {
     }
     AddRemove add = command.getInnerAdd();
     AddRemove remove = command.getInnerRemove();
-    checkSameValuesNotAddedAndRemoved(add.getStatusValues(), remove.getStatusValues());
-    checkSameValuesNotAddedAndRemoved(add.getInetAddresses(), remove.getInetAddresses());
+    verifyAddsAndRemoves(
+        existingHost.getStatusValues(), add.getStatusValues(), remove.getStatusValues());
+    verifyAddsAndRemoves(
+        existingHost.getInetAddresses(), add.getInetAddresses(), remove.getInetAddresses());
+    HostFlowUtils.validateInetAddresses(add.getInetAddresses());
     VKey<Domain> newSuperordinateDomainKey =
         newSuperordinateDomain.map(Domain::createVKey).orElse(null);
     // If the superordinateDomain field is changing, set the lastSuperordinateChange to now.

core/src/main/java/google/registry/model/domain/fee/FeeCheckCommandExtension.java

@@ -15,6 +15,8 @@
 package google.registry.model.domain.fee;
 
 import com.google.common.collect.ImmutableList;
+import com.google.common.collect.ImmutableSet;
+import google.registry.flows.EppException;
 import google.registry.model.eppinput.EppInput.CommandExtension;
 import org.joda.money.CurrencyUnit;
 
@@ -42,4 +44,11 @@ public interface FeeCheckCommandExtension<
   ImmutableList<C> getItems();
 
   R createResponse(ImmutableList<? extends FeeCheckResponseExtensionItem> items);
+
+  default R createResponse(
+      ImmutableList<? extends FeeCheckResponseExtensionItem> items,
+      ImmutableSet<CurrencyUnit> currenciesSeen)
+      throws EppException {
+    return createResponse(items);
+  }
 }

core/src/main/java/google/registry/model/domain/feestdv1/FeeCheckCommandExtensionItemStdV1.java

@@ -18,7 +18,6 @@ import com.google.common.base.Ascii;
 import google.registry.model.domain.Period;
 import google.registry.model.domain.fee.FeeCheckCommandExtensionItem;
 import jakarta.xml.bind.annotation.XmlAttribute;
-import jakarta.xml.bind.annotation.XmlElement;
 import jakarta.xml.bind.annotation.XmlType;
 import java.util.Locale;
 import java.util.Optional;
@@ -32,12 +31,13 @@ import org.joda.time.DateTime;
  * <pre>{@code
  * <fee:command name="renew" phase="sunrise" subphase="hello">
  *   <fee:period unit="y">1</fee:period>
- *   <fee:class>premium</fee:class>
- *   <fee:date>2017-05-17T13:22:21.0Z</fee:date>
  * </fee:command>
  * }</pre>
+ *
+ * <p>The `feeClass` and `feeDate` attributes that are present in version 0.12 are removed from this
+ * version.
  */
-@XmlType(propOrder = {"period", "feeClass", "feeDate"})
+@XmlType(propOrder = {"period"})
 public class FeeCheckCommandExtensionItemStdV1 extends FeeCheckCommandExtensionItem {
 
   /** The default validity period (if not specified) is 1 year for all operations. */
@@ -50,12 +50,6 @@ public class FeeCheckCommandExtensionItemStdV1 extends FeeCheckCommandExtensionI
 
   @XmlAttribute String subphase;
 
-  @XmlElement(name = "class")
-  String feeClass;
-
-  @XmlElement(name = "date")
-  DateTime feeDate;
-
   /** Version 1.0 does not support domain name or currency in fee extension items. */
   @Override
   public boolean isDomainNameSupported() {
@@ -107,6 +101,6 @@ public class FeeCheckCommandExtensionItemStdV1 extends FeeCheckCommandExtensionI
 
   @Override
   public Optional<DateTime> getEffectiveDate() {
-    return Optional.ofNullable(feeDate);
+    return Optional.empty();
   }
 }

core/src/main/java/google/registry/model/domain/feestdv1/FeeCheckCommandExtensionStdV1.java

@@ -17,6 +17,9 @@ package google.registry.model.domain.feestdv1;
 import static google.registry.util.CollectionUtils.nullToEmptyImmutableCopy;
 
 import com.google.common.collect.ImmutableList;
+import com.google.common.collect.ImmutableSet;
+import google.registry.flows.EppException;
+import google.registry.flows.EppException.ParameterValuePolicyErrorException;
 import google.registry.model.ImmutableObject;
 import google.registry.model.domain.fee.FeeCheckCommandExtension;
 import google.registry.model.domain.fee.FeeCheckResponseExtensionItem;
@@ -51,13 +54,33 @@ public class FeeCheckCommandExtensionStdV1 extends ImmutableObject
   @Override
   public FeeCheckResponseExtensionStdV1 createResponse(
       ImmutableList<? extends FeeCheckResponseExtensionItem> items) {
+    throw new UnsupportedOperationException("FeeCheckCommandExtensionStdV1 requires a currency");
+  }
+
+  @Override
+  public FeeCheckResponseExtensionStdV1 createResponse(
+      ImmutableList<? extends FeeCheckResponseExtensionItem> items,
+      ImmutableSet<CurrencyUnit> currenciesSeen)
+      throws EppException {
     ImmutableList.Builder<FeeCheckResponseExtensionItemStdV1> builder =
         new ImmutableList.Builder<>();
     for (FeeCheckResponseExtensionItem item : items) {
-      if (item instanceof FeeCheckResponseExtensionItemStdV1) {
-        builder.add((FeeCheckResponseExtensionItemStdV1) item);
+      if (item instanceof FeeCheckResponseExtensionItemStdV1 stdv1Item) {
+        builder.add(stdv1Item);
       }
     }
-    return FeeCheckResponseExtensionStdV1.create(currency, builder.build());
+    if (currenciesSeen.size() > 1) {
+      throw new MultipleCurrenciesCannotBeCheckedException();
+    }
+    return FeeCheckResponseExtensionStdV1.create(currenciesSeen.iterator().next(), builder.build());
+  }
+
+  /** Domains across multiple currencies cannot be checked simultaneously. */
+  public static class MultipleCurrenciesCannotBeCheckedException
+      extends ParameterValuePolicyErrorException {
+    public MultipleCurrenciesCannotBeCheckedException() {
+      // The fee extension 1.0 only supports one currency shared across all results
+      super("Domains across multiple currencies cannot be checked simultaneously");
+    }
   }
 }

core/src/main/java/google/registry/model/domain/feestdv1/FeeCheckResponseExtensionItemCommandStdV1.java

@@ -24,13 +24,11 @@ import google.registry.model.domain.Period;
 import google.registry.model.domain.fee.Fee;
 import google.registry.model.domain.fee.FeeQueryCommandExtensionItem.CommandName;
 import jakarta.xml.bind.annotation.XmlAttribute;
-import jakarta.xml.bind.annotation.XmlElement;
 import jakarta.xml.bind.annotation.XmlType;
 import java.util.List;
-import org.joda.time.DateTime;
 
 /** The version 1.0 response command entity for a domain check on a single resource. */
-@XmlType(propOrder = {"period", "fee", "feeClass", "effectiveDate", "notAfterDate"})
+@XmlType(propOrder = {"period", "fee"})
 public class FeeCheckResponseExtensionItemCommandStdV1 extends ImmutableObject {
 
   /** The command that was checked. */
@@ -53,26 +51,6 @@ public class FeeCheckResponseExtensionItemCommandStdV1 extends ImmutableObject {
    */
   List<Fee> fee;
 
-  /**
-   * The type of the fee.
-   *
-   * <p>We will use "premium" for fees on premium names, and omit the field otherwise.
-   */
-  @XmlElement(name = "class")
-  String feeClass;
-
-  /** The effective date that the check is to be performed on (if specified in the query). */
-  @XmlElement(name = "date")
-  DateTime effectiveDate;
-
-  /** The date after which the quoted fee is no longer valid (if applicable). */
-  @XmlElement(name = "notAfter")
-  DateTime notAfterDate;
-
-  public String getFeeClass() {
-    return feeClass;
-  }
-
   /** Builder for {@link FeeCheckResponseExtensionItemCommandStdV1}. */
   public static class Builder extends Buildable.Builder<FeeCheckResponseExtensionItemCommandStdV1> {
 
@@ -96,24 +74,9 @@ public class FeeCheckResponseExtensionItemCommandStdV1 extends ImmutableObject {
       return this;
     }
 
-    public Builder setEffectiveDate(DateTime effectiveDate) {
-      getInstance().effectiveDate = effectiveDate;
-      return this;
-    }
-
-    public Builder setNotAfterDate(DateTime notAfterDate) {
-      getInstance().notAfterDate = notAfterDate;
-      return this;
-    }
-
     public Builder setFee(List<Fee> fees) {
       getInstance().fee = forceEmptyToNull(ImmutableList.copyOf(fees));
       return this;
     }
-
-    public Builder setClass(String feeClass) {
-      getInstance().feeClass = feeClass;
-      return this;
-    }
   }
 }

core/src/main/java/google/registry/model/domain/feestdv1/FeeCheckResponseExtensionItemStdV1.java

@@ -17,20 +17,18 @@ package google.registry.model.domain.feestdv1;
 import static google.registry.util.CollectionUtils.forceEmptyToNull;
 
 import com.google.common.collect.ImmutableList;
-import google.registry.model.domain.DomainObjectSpec;
 import google.registry.model.domain.Period;
 import google.registry.model.domain.fee.Fee;
 import google.registry.model.domain.fee.FeeCheckResponseExtensionItem;
 import google.registry.model.domain.fee.FeeQueryCommandExtensionItem.CommandName;
 import jakarta.xml.bind.annotation.XmlType;
-import org.joda.time.DateTime;
 
 /** The version 1.0 response for a domain check on a single resource. */
-@XmlType(propOrder = {"object", "command"})
+@XmlType(propOrder = {"objID", "feeClass", "command"})
 public class FeeCheckResponseExtensionItemStdV1 extends FeeCheckResponseExtensionItem {
 
   /** The domain that was checked. */
-  DomainObjectSpec object;
+  String objID;
 
   /** The command that was checked. */
   FeeCheckResponseExtensionItemCommandStdV1 command;
@@ -53,15 +51,6 @@ public class FeeCheckResponseExtensionItemStdV1 extends FeeCheckResponseExtensio
     return super.getFees();
   }
 
-  /**
-   * This method is not annotated for JAXB because this version of the extension doesn't support
-   * "feeClass" and because the data comes off of the command object rather than a field.
-   */
-  @Override
-  public String getFeeClass() {
-    return command.getFeeClass();
-  }
-
   /** Builder for {@link FeeCheckResponseExtensionItemStdV1}. */
   public static class Builder
       extends FeeCheckResponseExtensionItem.Builder<FeeCheckResponseExtensionItemStdV1> {
@@ -91,13 +80,13 @@ public class FeeCheckResponseExtensionItemStdV1 extends FeeCheckResponseExtensio
 
     @Override
     public Builder setClass(String feeClass) {
-      commandBuilder.setClass(feeClass);
+      super.setClass(feeClass);
       return this;
     }
 
     @Override
     public Builder setDomainNameIfSupported(String name) {
-      getInstance().object = new DomainObjectSpec(name);
+      getInstance().objID = name;
       return this;
     }
 
@@ -106,17 +95,5 @@ public class FeeCheckResponseExtensionItemStdV1 extends FeeCheckResponseExtensio
       getInstance().command = commandBuilder.build();
       return super.build();
     }
-
-    @Override
-    public Builder setEffectiveDateIfSupported(DateTime effectiveDate) {
-      commandBuilder.setEffectiveDate(effectiveDate);
-      return this;
-    }
-
-    @Override
-    public Builder setNotAfterDateIfSupported(DateTime notAfterDate) {
-      commandBuilder.setNotAfterDate(notAfterDate);
-      return this;
-    }
   }
 }

core/src/main/java/google/registry/model/domain/secdns/DomainDsDataBase.java

@@ -31,7 +31,7 @@ import jakarta.xml.bind.annotation.adapters.XmlJavaTypeAdapter;
 @Access(AccessType.FIELD)
 public abstract class DomainDsDataBase extends ImmutableObject implements UnsafeSerializable {
 
-  @XmlTransient @Transient String domainRepoId;
+  @XmlTransient @Transient @Insignificant String domainRepoId;
 
   /** The identifier for this particular key in the domain. */
   @Transient int keyTag;

core/src/main/java/google/registry/model/domain/secdns/SecDnsUpdateExtension.java

@@ -24,6 +24,7 @@ import jakarta.xml.bind.annotation.XmlElement;
 import jakarta.xml.bind.annotation.XmlRootElement;
 import jakarta.xml.bind.annotation.XmlTransient;
 import jakarta.xml.bind.annotation.XmlType;
+import java.util.Optional;
 import java.util.Set;
 
 /** The EPP secDNS extension that may be present on domain update commands. */
@@ -55,16 +56,16 @@ public class SecDnsUpdateExtension extends ImmutableObject implements CommandExt
     return urgent;
   }
 
-  public Remove getRemove() {
-    return remove;
+  public Optional<Remove> getRemove() {
+    return Optional.ofNullable(remove);
   }
 
-  public Add getAdd() {
-    return add;
+  public Optional<Add> getAdd() {
+    return Optional.ofNullable(add);
   }
 
-  public Change getChange() {
-    return change;
+  public Optional<Change> getChange() {
+    return Optional.ofNullable(change);
   }
 
   @XmlTransient

core/src/main/java/google/registry/model/eppcommon/EppXmlTransformer.java

@@ -14,13 +14,16 @@
 
 package google.registry.model.eppcommon;
 
+import static com.google.common.collect.ImmutableList.toImmutableList;
 import static java.nio.charset.StandardCharsets.UTF_8;
 
 import com.google.common.annotations.VisibleForTesting;
 import com.google.common.collect.ImmutableList;
+import com.google.common.collect.ImmutableSet;
 import google.registry.model.ImmutableObject;
 import google.registry.model.eppinput.EppInput;
 import google.registry.model.eppoutput.EppOutput;
+import google.registry.util.RegistryEnvironment;
 import google.registry.xml.ValidationMode;
 import google.registry.xml.XmlException;
 import google.registry.xml.XmlTransformer;
@@ -31,7 +34,7 @@ import java.io.ByteArrayOutputStream;
 public class EppXmlTransformer  {
 
   // Hardcoded XML schemas, ordered with respect to dependency.
-  private static final ImmutableList<String> SCHEMAS =
+  private static final ImmutableList<String> ALL_SCHEMAS =
       ImmutableList.of(
           "eppcom.xsd",
           "epp.xsd",
@@ -54,11 +57,24 @@ public class EppXmlTransformer  {
           "allocationToken-1.0.xsd",
           "bulkToken.xsd");
 
+  // XML schemas that should not be used in production (yet)
+  private static final ImmutableSet<String> NON_PROD_SCHEMAS = ImmutableSet.of("fee-std-v1.xsd");
+
   private static final XmlTransformer INPUT_TRANSFORMER =
-      new XmlTransformer(SCHEMAS, EppInput.class);
+      new XmlTransformer(getSchemas(), EppInput.class);
 
   private static final XmlTransformer OUTPUT_TRANSFORMER =
-      new XmlTransformer(SCHEMAS, EppOutput.class);
+      new XmlTransformer(getSchemas(), EppOutput.class);
+
+  @VisibleForTesting
+  public static ImmutableList<String> getSchemas() {
+    if (RegistryEnvironment.get().equals(RegistryEnvironment.PRODUCTION)) {
+      return ALL_SCHEMAS.stream()
+          .filter(s -> !NON_PROD_SCHEMAS.contains(s))
+          .collect(toImmutableList());
+    }
+    return ALL_SCHEMAS;
+  }
 
   public static void validateOutput(String xml) throws XmlException {
     OUTPUT_TRANSFORMER.validate(xml);

core/src/main/java/google/registry/model/eppcommon/ProtocolDefinition.java

@@ -33,6 +33,7 @@ import google.registry.model.domain.rgp.RgpUpdateExtension;
 import google.registry.model.domain.secdns.SecDnsCreateExtension;
 import google.registry.model.eppinput.EppInput.CommandExtension;
 import google.registry.model.eppoutput.EppResponse.ResponseExtension;
+import google.registry.util.RegistryEnvironment;
 import jakarta.xml.bind.annotation.XmlSchema;
 import java.util.EnumSet;
 
@@ -43,35 +44,52 @@ public class ProtocolDefinition {
   public static final String LANGUAGE = "en";
 
   public static final ImmutableSet<String> SUPPORTED_OBJECT_SERVICES =
-      ImmutableSet.of(
-          "urn:ietf:params:xml:ns:host-1.0",
-          "urn:ietf:params:xml:ns:domain-1.0",
-          "urn:ietf:params:xml:ns:contact-1.0");
+      ImmutableSet.of("urn:ietf:params:xml:ns:host-1.0", "urn:ietf:params:xml:ns:domain-1.0");
 
-  /** Enums repesenting valid service extensions that are recognized by the server. */
+  /** Enum representing which environments should have which service extensions enabled. */
+  private enum ServiceExtensionVisibility {
+    ALL,
+    ONLY_IN_PRODUCTION,
+    ONLY_IN_NON_PRODUCTION,
+    NONE
+  }
+
+  /** Enum representing valid service extensions that are recognized by the server. */
   public enum ServiceExtension {
-    LAUNCH_EXTENSION_1_0(LaunchCreateExtension.class, null, true),
-    REDEMPTION_GRACE_PERIOD_1_0(RgpUpdateExtension.class, null, true),
-    SECURE_DNS_1_1(SecDnsCreateExtension.class, null, true),
-    FEE_0_6(FeeCheckCommandExtensionV06.class, FeeCheckResponseExtensionV06.class, true),
-    FEE_0_11(FeeCheckCommandExtensionV11.class, FeeCheckResponseExtensionV11.class, true),
-    FEE_0_12(FeeCheckCommandExtensionV12.class, FeeCheckResponseExtensionV12.class, true),
-    FEE_1_00(FeeCheckCommandExtensionStdV1.class, FeeCheckResponseExtensionStdV1.class, false),
-    METADATA_1_0(MetadataExtension.class, null, false);
+    LAUNCH_EXTENSION_1_0(LaunchCreateExtension.class, null, ServiceExtensionVisibility.ALL),
+    REDEMPTION_GRACE_PERIOD_1_0(RgpUpdateExtension.class, null, ServiceExtensionVisibility.ALL),
+    SECURE_DNS_1_1(SecDnsCreateExtension.class, null, ServiceExtensionVisibility.ALL),
+    FEE_0_6(
+        FeeCheckCommandExtensionV06.class,
+        FeeCheckResponseExtensionV06.class,
+        ServiceExtensionVisibility.ALL),
+    FEE_0_11(
+        FeeCheckCommandExtensionV11.class,
+        FeeCheckResponseExtensionV11.class,
+        ServiceExtensionVisibility.ALL),
+    FEE_0_12(
+        FeeCheckCommandExtensionV12.class,
+        FeeCheckResponseExtensionV12.class,
+        ServiceExtensionVisibility.ALL),
+    FEE_1_00(
+        FeeCheckCommandExtensionStdV1.class,
+        FeeCheckResponseExtensionStdV1.class,
+        ServiceExtensionVisibility.ONLY_IN_NON_PRODUCTION),
+    METADATA_1_0(MetadataExtension.class, null, ServiceExtensionVisibility.NONE);
 
     private final Class<? extends CommandExtension> commandExtensionClass;
     private final Class<? extends ResponseExtension> responseExtensionClass;
     private final String uri;
-    private final boolean visible;
+    private final ServiceExtensionVisibility visibility;
 
     ServiceExtension(
         Class<? extends CommandExtension> commandExtensionClass,
         Class<? extends ResponseExtension> responseExtensionClass,
-        boolean visible) {
+        ServiceExtensionVisibility visibility) {
       this.commandExtensionClass = commandExtensionClass;
       this.responseExtensionClass = responseExtensionClass;
       this.uri = getCommandExtensionUri(commandExtensionClass);
-      this.visible = visible;
+      this.visibility = visibility;
     }
 
     public Class<? extends CommandExtension> getCommandExtensionClass() {
@@ -86,14 +104,20 @@ public class ProtocolDefinition {
       return uri;
     }
 
-    public boolean getVisible() {
-      return visible;
-    }
-
     /** Returns the namespace URI of the command extension class. */
     public static String getCommandExtensionUri(Class<? extends CommandExtension> clazz) {
       return clazz.getPackage().getAnnotation(XmlSchema.class).namespace();
     }
+
+    private boolean isVisible() {
+      return switch (visibility) {
+        case ALL -> true;
+        case ONLY_IN_PRODUCTION -> RegistryEnvironment.get().equals(RegistryEnvironment.PRODUCTION);
+        case ONLY_IN_NON_PRODUCTION ->
+            !RegistryEnvironment.get().equals(RegistryEnvironment.PRODUCTION);
+        case NONE -> false;
+      };
+    }
   }
 
   /**
@@ -111,9 +135,8 @@ public class ProtocolDefinition {
 
   /** A set of all the visible extension URIs. */
   private static final ImmutableSet<String> visibleServiceExtensionUris =
-      EnumSet.allOf(ServiceExtension.class)
-          .stream()
-          .filter(ServiceExtension::getVisible)
+      EnumSet.allOf(ServiceExtension.class).stream()
+          .filter(ServiceExtension::isVisible)
           .map(ServiceExtension::getUri)
           .collect(toImmutableSet());
 

core/src/main/java/google/registry/module/RequestComponent.java

@@ -62,6 +62,9 @@ import google.registry.module.ReadinessProbeAction.ReadinessProbeActionFrontend;
 import google.registry.module.ReadinessProbeAction.ReadinessProbeActionPubApi;
 import google.registry.module.ReadinessProbeAction.ReadinessProbeConsoleAction;
 import google.registry.monitoring.whitebox.WhiteboxModule;
+import google.registry.mosapi.GetServiceStateAction;
+import google.registry.mosapi.TriggerServiceStateAction;
+import google.registry.mosapi.module.MosApiRequestModule;
 import google.registry.rdap.RdapAutnumAction;
 import google.registry.rdap.RdapDomainAction;
 import google.registry.rdap.RdapDomainSearchAction;
@@ -151,6 +154,7 @@ import google.registry.ui.server.console.settings.SecurityAction;
       EppToolModule.class,
       IcannReportingModule.class,
       LoadTestModule.class,
+      MosApiRequestModule.class,
       RdapModule.class,
       RdeModule.class,
       ReportingModule.class,
@@ -232,6 +236,8 @@ interface RequestComponent {
 
   GenerateZoneFilesAction generateZoneFilesAction();
 
+  GetServiceStateAction getServiceStateAction();
+
   IcannReportingStagingAction icannReportingStagingAction();
 
   IcannReportingUploadAction icannReportingUploadAction();
@@ -334,6 +340,8 @@ interface RequestComponent {
 
   TmchSmdrlAction tmchSmdrlAction();
 
+  TriggerServiceStateAction triggerServiceStateAction();
+
   UpdateRegistrarRdapBaseUrlsAction updateRegistrarRdapBaseUrlsAction();
 
   UpdateUserGroupAction updateUserGroupAction();

core/src/main/java/google/registry/mosapi/GetServiceStateAction.java

@@ -0,0 +1,68 @@
+// Copyright 2025 The Nomulus Authors. All Rights Reserved.
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+package google.registry.mosapi;
+
+import com.google.common.net.MediaType;
+import com.google.gson.Gson;
+import google.registry.request.Action;
+import google.registry.request.HttpException.ServiceUnavailableException;
+import google.registry.request.Parameter;
+import google.registry.request.Response;
+import google.registry.request.auth.Auth;
+import jakarta.inject.Inject;
+import java.util.Optional;
+
+/** An action that returns the current MoSAPI service state for a given TLD or all TLDs. */
+@Action(
+    service = Action.Service.BACKEND,
+    path = GetServiceStateAction.PATH,
+    method = Action.Method.GET,
+    auth = Auth.AUTH_ADMIN)
+public class GetServiceStateAction implements Runnable {
+
+  public static final String PATH = "/_dr/mosapi/getServiceState";
+  public static final String TLD_PARAM = "tld";
+
+  private final MosApiStateService stateService;
+  private final Response response;
+  private final Gson gson;
+  private final Optional<String> tld;
+
+  @Inject
+  public GetServiceStateAction(
+      MosApiStateService stateService,
+      Response response,
+      Gson gson,
+      @Parameter(TLD_PARAM) Optional<String> tld) {
+    this.stateService = stateService;
+    this.response = response;
+    this.gson = gson;
+    this.tld = tld;
+  }
+
+  @Override
+  public void run() {
+    response.setContentType(MediaType.JSON_UTF_8);
+    try {
+      if (tld.isPresent()) {
+        response.setPayload(gson.toJson(stateService.getServiceStateSummary(tld.get())));
+      } else {
+        response.setPayload(gson.toJson(stateService.getAllServiceStateSummaries()));
+      }
+    } catch (MosApiException e) {
+      throw new ServiceUnavailableException("Error fetching MoSAPI service state.");
+    }
+  }
+}

core/src/main/java/google/registry/mosapi/MosApiErrorResponse.java

@@ -12,7 +12,9 @@
 // See the License for the specific language governing permissions and
 // limitations under the License.
 
-package google.registry.mosapi.model;
+package google.registry.mosapi;
+
+import com.google.gson.annotations.Expose;
 
 /**
  * Represents the generic JSON error response from the MoSAPI service for a 400 Bad Request.
@@ -20,4 +22,5 @@ package google.registry.mosapi.model;
  * @see <a href="https://www.icann.org/mosapi-specification.pdf">ICANN MoSAPI Specification, Section
  *     8</a>
  */
-public record MosApiErrorResponse(String resultCode, String message, String description) {}
+public record MosApiErrorResponse(
+    @Expose String resultCode, @Expose String message, @Expose String description) {}

core/src/main/java/google/registry/mosapi/MosApiException.java

@@ -17,7 +17,6 @@ package google.registry.mosapi;
 import static java.lang.annotation.ElementType.TYPE;
 import static java.lang.annotation.RetentionPolicy.RUNTIME;
 
-import google.registry.mosapi.model.MosApiErrorResponse;
 import java.io.IOException;
 import java.lang.annotation.Documented;
 import java.lang.annotation.Retention;
@@ -42,6 +41,11 @@ public class MosApiException extends IOException {
     this.errorResponse = null;
   }
 
+  public MosApiException(String message) {
+    super(message);
+    this.errorResponse = null;
+  }
+
   public Optional<MosApiErrorResponse> getErrorResponse() {
     return Optional.ofNullable(errorResponse);
   }

core/src/main/java/google/registry/mosapi/MosApiMetrics.java

@@ -0,0 +1,34 @@
+// Copyright 2026 The Nomulus Authors. All Rights Reserved.
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+package google.registry.mosapi;
+
+import com.google.common.flogger.FluentLogger;
+import google.registry.mosapi.MosApiModels.TldServiceState;
+import jakarta.inject.Inject;
+import java.util.List;
+
+/** Metrics Exporter for MoSAPI. */
+public class MosApiMetrics {
+
+  private static final FluentLogger logger = FluentLogger.forEnclosingClass();
+
+  @Inject
+  public MosApiMetrics() {}
+
+  public void recordStates(List<TldServiceState> states) {
+    // b/467541269: Logic to push status to Cloud Monitoring goes here
+    logger.atInfo().log("MoSAPI record metrics logic will be implemented from here");
+  }
+}

core/src/main/java/google/registry/mosapi/MosApiModels.java

@@ -0,0 +1,122 @@
+// Copyright 2025 The Nomulus Authors. All Rights Reserved.
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+package google.registry.mosapi;
+
+import static google.registry.util.CollectionUtils.nullToEmptyImmutableCopy;
+
+import com.google.gson.annotations.Expose;
+import com.google.gson.annotations.SerializedName;
+import java.util.List;
+import java.util.Map;
+import javax.annotation.Nullable;
+
+/** Data models for ICANN MoSAPI. */
+public final class MosApiModels {
+
+  private MosApiModels() {}
+
+  /**
+   * A wrapper response containing the state summaries of all monitored services.
+   *
+   * <p>This corresponds to the collection of service statuses returned when monitoring the state of
+   * a TLD
+   *
+   * @see <a href="https://www.icann.org/mosapi-specification.pdf">ICANN MoSAPI Specification,
+   *     Section 5.1</a>
+   */
+  public record AllServicesStateResponse(
+      // A list of state summaries for each monitored service (e.g. DNS, RDDS, etc.)
+      @Expose List<ServiceStateSummary> serviceStates) {
+
+    public AllServicesStateResponse {
+      serviceStates = nullToEmptyImmutableCopy(serviceStates);
+    }
+  }
+
+  /**
+   * A summary of a service incident.
+   *
+   * @see <a href="https://www.icann.org/mosapi-specification.pdf">ICANN MoSAPI Specification,
+   *     Section 5.1</a>
+   */
+  public record IncidentSummary(
+      @Expose String incidentID,
+      @Expose long startTime,
+      @Expose boolean falsePositive,
+      @Expose String state,
+      @Expose @Nullable Long endTime) {}
+
+  /**
+   * A curated summary of the service state for a TLD.
+   *
+   * <p>This class aggregates the high-level status of a TLD and details of any active incidents
+   * affecting specific services (like DNS or RDDS), based on the data structures defined in the
+   * MoSAPI specification.
+   *
+   * @see <a href="https://www.icann.org/mosapi-specification.pdf">ICANN MoSAPI Specification,
+   *     Section 5.1</a>
+   */
+  public record ServiceStateSummary(
+      @Expose String tld,
+      @Expose String overallStatus,
+      @Expose List<ServiceStatus> activeIncidents) {
+
+    public ServiceStateSummary {
+      activeIncidents = nullToEmptyImmutableCopy(activeIncidents);
+    }
+  }
+
+  /** Represents the status of a single monitored service. */
+  public record ServiceStatus(
+      /**
+       * A JSON string that contains the status of the Service as seen from the monitoring system.
+       * Possible values include "Up", "Down", "Disabled", "UP-inconclusive-no-data", etc.
+       */
+      @Expose String status,
+
+      //  A JSON number that contains the current percentage of the Emergency Threshold
+      //  of the Service. A value of "0" specifies that there are no Incidents
+      //  affecting the threshold.
+      @Expose double emergencyThreshold,
+      @Expose List<IncidentSummary> incidents) {
+
+    public ServiceStatus {
+      incidents = nullToEmptyImmutableCopy(incidents);
+    }
+  }
+
+  /**
+   * Represents the overall health of all monitored services for a TLD.
+   *
+   * @see <a href="https://www.icann.org/mosapi-specification.pdf">ICANN MoSAPI Specification,
+   *     Section 5.1</a>
+   */
+  public record TldServiceState(
+      @Expose String tld,
+      long lastUpdateApiDatabase,
+
+      // A JSON string that contains the status of the TLD as seen from the monitoring system
+      @Expose String status,
+
+      // A JSON object containing detailed information for each potential monitored service (i.e.,
+      // DNS,
+      //  RDDS, EPP, DNSSEC, RDAP).
+      @Expose @SerializedName("testedServices") Map<String, ServiceStatus> serviceStatuses) {
+
+    public TldServiceState {
+      serviceStatuses = nullToEmptyImmutableCopy(serviceStatuses);
+    }
+  }
+}

core/src/main/java/google/registry/mosapi/MosApiStateService.java

@@ -0,0 +1,154 @@
+// Copyright 2025 The Nomulus Authors. All Rights Reserved.
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+package google.registry.mosapi;
+
+import static com.google.common.collect.ImmutableList.toImmutableList;
+
+import com.google.common.collect.ImmutableList;
+import com.google.common.collect.ImmutableSet;
+import com.google.common.flogger.FluentLogger;
+import google.registry.config.RegistryConfig.Config;
+import google.registry.mosapi.MosApiModels.AllServicesStateResponse;
+import google.registry.mosapi.MosApiModels.ServiceStateSummary;
+import google.registry.mosapi.MosApiModels.ServiceStatus;
+import google.registry.mosapi.MosApiModels.TldServiceState;
+import jakarta.inject.Inject;
+import jakarta.inject.Named;
+import java.util.List;
+import java.util.Objects;
+import java.util.concurrent.CompletableFuture;
+import java.util.concurrent.ExecutorService;
+import java.util.stream.Collectors;
+
+/** A service that provides business logic for interacting with MoSAPI Service State. */
+public class MosApiStateService {
+
+  private static final FluentLogger logger = FluentLogger.forEnclosingClass();
+  private final ServiceMonitoringClient serviceMonitoringClient;
+  private final ExecutorService tldExecutor;
+
+  private final ImmutableSet<String> tlds;
+
+  private final MosApiMetrics mosApiMetrics;
+
+  private static final String DOWN_STATUS = "Down";
+  private static final String FETCH_ERROR_STATUS = "ERROR";
+
+  @Inject
+  public MosApiStateService(
+      ServiceMonitoringClient serviceMonitoringClient,
+      MosApiMetrics mosApiMetrics,
+      @Config("mosapiTlds") ImmutableSet<String> tlds,
+      @Named("mosapiTldExecutor") ExecutorService tldExecutor) {
+    this.serviceMonitoringClient = serviceMonitoringClient;
+    this.mosApiMetrics = mosApiMetrics;
+    this.tlds = tlds;
+    this.tldExecutor = tldExecutor;
+  }
+
+  /** Fetches and transforms the service state for a given TLD into a summary. */
+  public ServiceStateSummary getServiceStateSummary(String tld) throws MosApiException {
+    TldServiceState rawState = serviceMonitoringClient.getTldServiceState(tld);
+    return transformToSummary(rawState);
+  }
+
+  /** Fetches and transforms the service state for all configured TLDs. */
+  public AllServicesStateResponse getAllServiceStateSummaries() {
+    ImmutableList<CompletableFuture<ServiceStateSummary>> futures =
+        tlds.stream()
+            .map(
+                tld ->
+                    CompletableFuture.supplyAsync(
+                        () -> {
+                          try {
+                            return getServiceStateSummary(tld);
+                          } catch (MosApiException e) {
+                            logger.atWarning().withCause(e).log(
+                                "Failed to get service state for TLD %s.", tld);
+                            // we don't want to throw exception if fetch failed
+                            return new ServiceStateSummary(tld, FETCH_ERROR_STATUS, null);
+                          }
+                        },
+                        tldExecutor))
+            .collect(ImmutableList.toImmutableList());
+
+    ImmutableList<ServiceStateSummary> summaries =
+        futures.stream()
+            .map(CompletableFuture::join) // Waits for all tasks to complete
+            .collect(toImmutableList());
+
+    return new AllServicesStateResponse(summaries);
+  }
+
+  private ServiceStateSummary transformToSummary(TldServiceState rawState) {
+    ImmutableList<ServiceStatus> activeIncidents = ImmutableList.of();
+    if (DOWN_STATUS.equalsIgnoreCase(rawState.status())) {
+      activeIncidents =
+          rawState.serviceStatuses().entrySet().stream()
+              .filter(
+                  entry -> {
+                    ServiceStatus serviceStatus = entry.getValue();
+                    return serviceStatus.incidents() != null
+                        && !serviceStatus.incidents().isEmpty();
+                  })
+              .map(
+                  entry ->
+                      new ServiceStatus(
+                          // key is the service name
+                          entry.getKey(),
+                          entry.getValue().emergencyThreshold(),
+                          entry.getValue().incidents()))
+              .collect(toImmutableList());
+    }
+    return new ServiceStateSummary(rawState.tld(), rawState.status(), activeIncidents);
+  }
+
+  /** Triggers monitoring exposure for all configured TLDs. */
+  public void triggerMetricsForAllServiceStateSummaries() {
+    ImmutableList<CompletableFuture<TldServiceState>> futures =
+        tlds.stream()
+            .map(
+                tld ->
+                    CompletableFuture.supplyAsync(
+                        () -> {
+                          try {
+                            return serviceMonitoringClient.getTldServiceState(tld);
+                          } catch (MosApiException e) {
+                            // Log the error but don't rethrow as RuntimeException
+                            logger.atWarning().withCause(e).log(
+                                "Failed to fetch state for TLD: %s", tld);
+                            return null; // Return null so the stream keeps moving
+                          }
+                        },
+                        tldExecutor))
+            .collect(toImmutableList());
+
+    List<TldServiceState> allStates =
+        futures.stream()
+            .map(CompletableFuture::join)
+            .filter(Objects::nonNull)
+            .collect(Collectors.toList());
+
+    if (!allStates.isEmpty()) {
+      try {
+        mosApiMetrics.recordStates(allStates);
+      } catch (Exception e) {
+        logger.atSevere().withCause(e).log("Failed to submit MoSAPI metrics batch.");
+      }
+    } else {
+      logger.atWarning().log("No successful TLD states fetched; skipping metrics push.");
+    }
+  }
+}

core/src/main/java/google/registry/mosapi/ServiceMonitoringClient.java

@@ -0,0 +1,80 @@
+// Copyright 2025 The Nomulus Authors. All Rights Reserved.
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+package google.registry.mosapi;
+
+import com.google.common.base.Throwables;
+import com.google.gson.Gson;
+import com.google.gson.JsonParseException;
+import google.registry.mosapi.MosApiModels.TldServiceState;
+import jakarta.inject.Inject;
+import java.io.IOException;
+import java.util.Collections;
+import okhttp3.Response;
+import okhttp3.ResponseBody;
+
+/** Facade for MoSAPI's service monitoring endpoints. */
+public class ServiceMonitoringClient {
+
+  private static final String MONITORING_STATE_ENDPOINT = "v2/monitoring/state";
+  private final MosApiClient mosApiClient;
+  private final Gson gson;
+
+  @Inject
+  public ServiceMonitoringClient(MosApiClient mosApiClient, Gson gson) {
+    this.mosApiClient = mosApiClient;
+    this.gson = gson;
+  }
+
+  /**
+   * Fetches the current state of all monitored services for a given TLD.
+   *
+   * @see <a href="https://www.icann.org/mosapi-specification.pdf">ICANN MoSAPI Specification,
+   *     Section 5.1</a>
+   */
+  public TldServiceState getTldServiceState(String tld) throws MosApiException {
+    try (Response response =
+        mosApiClient.sendGetRequest(
+            tld, MONITORING_STATE_ENDPOINT, Collections.emptyMap(), Collections.emptyMap())) {
+
+      ResponseBody responseBody = response.body();
+      if (responseBody == null) {
+        throw new MosApiException(
+            String.format(
+                "MoSAPI Service Monitoring API " + "returned an empty body with status: %d",
+                response.code()));
+      }
+      String bodyString = responseBody.string();
+      if (!response.isSuccessful()) {
+        throw parseErrorResponse(response.code(), bodyString);
+      }
+      return gson.fromJson(bodyString, TldServiceState.class);
+    } catch (IOException | JsonParseException e) {
+      Throwables.throwIfInstanceOf(e, MosApiException.class);
+      // Catch Gson's runtime exceptions (parsing errors) and wrap them
+      throw new MosApiException("Failed to parse TLD service state response", e);
+    }
+  }
+
+  /** Parses an unsuccessful MoSAPI response into a domain-specific {@link MosApiException}. */
+  private MosApiException parseErrorResponse(int statusCode, String bodyString) {
+    try {
+      MosApiErrorResponse error = gson.fromJson(bodyString, MosApiErrorResponse.class);
+      return MosApiException.create(error);
+    } catch (JsonParseException e) {
+      return new MosApiException(
+          String.format("MoSAPI json parsing error (%d): %s", statusCode, bodyString), e);
+    }
+  }
+}

core/src/main/java/google/registry/mosapi/TriggerServiceStateAction.java

@@ -0,0 +1,59 @@
+// Copyright 2026 The Nomulus Authors. All Rights Reserved.
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+package google.registry.mosapi;
+
+import com.google.common.flogger.FluentLogger;
+import com.google.common.net.MediaType;
+import google.registry.request.Action;
+import google.registry.request.HttpException.InternalServerErrorException;
+import google.registry.request.Response;
+import google.registry.request.auth.Auth;
+import jakarta.inject.Inject;
+
+/**
+ * An action that triggers Metrics action for the current MoSAPI service state result for all TLDs.
+ */
+@Action(
+    service = Action.Service.BACKEND,
+    path = TriggerServiceStateAction.PATH,
+    method = Action.Method.GET,
+    auth = Auth.AUTH_ADMIN)
+public class TriggerServiceStateAction implements Runnable {
+
+  private static final FluentLogger logger = FluentLogger.forEnclosingClass();
+
+  public static final String PATH = "/_dr/task/triggerMosApiServiceState";
+  private final MosApiStateService stateService;
+  private final Response response;
+
+  @Inject
+  public TriggerServiceStateAction(MosApiStateService stateService, Response response) {
+    this.stateService = stateService;
+    this.response = response;
+  }
+
+  @Override
+  public void run() {
+    response.setContentType(MediaType.PLAIN_TEXT_UTF_8);
+    try {
+      stateService.triggerMetricsForAllServiceStateSummaries();
+      response.setStatus(200);
+      response.setPayload("MoSAPI metrics triggered successfully for all TLDs.");
+    } catch (Exception e) {
+      logger.atSevere().withCause(e).log("Error triggering MoSAPI metrics.");
+      throw new InternalServerErrorException("Failed to process MoSAPI metrics.");
+    }
+  }
+}

core/src/main/java/google/registry/mosapi/module/MosApiModule.java

@@ -32,6 +32,8 @@ import java.security.cert.Certificate;
 import java.security.cert.CertificateException;
 import java.security.cert.CertificateFactory;
 import java.util.Optional;
+import java.util.concurrent.ExecutorService;
+import java.util.concurrent.Executors;
 import javax.net.ssl.KeyManagerFactory;
 import javax.net.ssl.SSLContext;
 import javax.net.ssl.TrustManagerFactory;
@@ -184,4 +186,21 @@ public final class MosApiModule {
         .sslSocketFactory(sslContext.getSocketFactory(), trustManager)
         .build();
   }
+
+  /**
+   * Provides a fixed thread pool for parallel TLD processing.
+   *
+   * <p>Strictly bound to 4 threads to comply with MoSAPI session limits (4 concurrent sessions per
+   * certificate). This is used by MosApiStateService to fetch data in parallel.
+   *
+   * @see <a href="https://www.icann.org/mosapi-specification.pdf">ICANN MoSAPI Specification,
+   *     Section 12.3</a>
+   */
+  @Provides
+  @Singleton
+  @Named("mosapiTldExecutor")
+  static ExecutorService provideMosapiTldExecutor(
+      @Config("mosapiTldThreadCnt") int threadPoolSize) {
+    return Executors.newFixedThreadPool(threadPoolSize);
+  }
 }

core/src/main/java/google/registry/mosapi/module/MosApiRequestModule.java

@@ -0,0 +1,33 @@
+// Copyright 2025 The Nomulus Authors. All Rights Reserved.
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+package google.registry.mosapi.module;
+
+import static google.registry.request.RequestParameters.extractOptionalParameter;
+
+import dagger.Module;
+import dagger.Provides;
+import google.registry.request.Parameter;
+import jakarta.servlet.http.HttpServletRequest;
+import java.util.Optional;
+
+/** Dagger module for MoSAPI requests. */
+@Module
+public final class MosApiRequestModule {
+  @Provides
+  @Parameter("tld")
+  static Optional<String> provideTld(HttpServletRequest req) {
+    return extractOptionalParameter(req, "tld");
+  }
+}

core/src/main/java/google/registry/xml/XmlTransformer.java

@@ -38,7 +38,6 @@ import java.io.StringWriter;
 import java.io.Writer;
 import java.nio.charset.Charset;
 import java.util.Collection;
-import java.util.List;
 import java.util.Map;
 import javax.annotation.Nullable;
 import javax.xml.XMLConstants;
@@ -82,7 +81,7 @@ public class XmlTransformer {
    * @param schemaFilenames schema files, used only for validating, and relative to this package.
    * @param recognizedClasses the classes that can be used to marshal to and from
    */
-  public XmlTransformer(List<String> schemaFilenames, Class<?>... recognizedClasses) {
+  public XmlTransformer(ImmutableList<String> schemaFilenames, Class<?>... recognizedClasses) {
     try {
       this.jaxbContext = JAXBContext.newInstance(recognizedClasses);
       this.schema = loadXmlSchemas(schemaFilenames);
@@ -251,7 +250,7 @@ public class XmlTransformer {
   }
 
   /** Creates a single {@link Schema} from multiple {@code .xsd} files. */
-  public static Schema loadXmlSchemas(List<String> schemaFilenames) {
+  public static Schema loadXmlSchemas(ImmutableList<String> schemaFilenames) {
     try (Closer closer = Closer.create()) {
       StreamSource[] sources = new StreamSource[schemaFilenames.size()];
       for (int i = 0; i < schemaFilenames.size(); ++i) {

core/src/main/java/google/registry/xml/xsd/fee-std-v1.xsd

@@ -23,7 +23,7 @@
   <element name="renew" type="fee:transformCommandType" />
   <element name="renData" type="fee:transformResultType" />
   <element name="transfer" type="fee:transformCommandType" />
-  <element name="trnData" type="fee:transferResultType" />
+  <element name="trnData" type="fee:transformResultType" />
   <element name="update" type="fee:transformCommandType" />
   <element name="updData" type="fee:transformResultType" />
   <element name="delData" type="fee:transformResultType" />
@@ -33,32 +33,24 @@
     <sequence>
       <element name="currency" type="fee:currencyType"
         minOccurs="0" />
-      <element name="command" type="fee:commandCheckType"
-        maxOccurs="unbounded" />
+      <element name="command" type="fee:commandType"
+        minOccurs="1" maxOccurs="unbounded" />
     </sequence>
   </complexType>
 
-  <complexType name="commandCheckType">
-    <sequence>
-      <element name="period"
-        type="domain:periodType"
-        minOccurs="0" />
-      <element name="class"
-        type="token"
-        minOccurs="0" />
-      <element name="date"
-        type="dateTime"
-        minOccurs="0" />
-    </sequence>
-    <attribute name="name" type="fee:commandTypeValue" />
-    <attribute name="phase" type="token" />
-    <attribute name="subphase" type="token" />
+  <complexType name="objectIdentifierType">
+    <simpleContent>
+      <extension base="eppcom:labelType">
+        <attribute name="element"
+        type="NMTOKEN" default="name" />
+      </extension>
+    </simpleContent>
   </complexType>
 
   <!-- server <check> result -->
   <complexType name="chkDataType">
     <sequence>
-      <element name="currency" type="fee:currencyType" minOccurs="0"/>
+      <element name="currency" type="fee:currencyType" />
       <element name="cd" type="fee:objectCDType"
         maxOccurs="unbounded" />
     </sequence>
@@ -66,47 +58,13 @@
 
   <complexType name="objectCDType">
     <sequence>
-      <element name="object">
-        <complexType>
-          <sequence>
-            <any namespace="##other" processContents="lax"/>
-          </sequence>
-        </complexType>
-      </element>
-      <element name="command"
-        type="fee:commandCDType"
-        maxOccurs="unbounded" />
-    </sequence>
-  </complexType>
-
-  <complexType name="commandCDType">
-    <sequence>
-      <element name="period"
-        type="domain:periodType"
-        minOccurs="0" maxOccurs="1" />
-      <element name="fee"
-        type="fee:feeType"
+      <element name="objID" type="fee:objectIdentifierType" />
+      <element name="class" type="token" minOccurs="0" />
+      <element name="command" type="fee:commandDataType"
         minOccurs="0" maxOccurs="unbounded" />
-      <element name="credit"
-        type="fee:creditType"
-        minOccurs="0" maxOccurs="unbounded" />
-      <element name="class"
-        type="token"
-        minOccurs="0" />
-      <element name="reason"
-        type="token"
-        minOccurs="0" />
-      <element name="date"
-        type="dateTime"
-        minOccurs="0" />
-      <element name="notAfter"
-        type="dateTime"
-        minOccurs="0" />
+      <element name="reason" type="fee:reasonType" minOccurs="0" />
     </sequence>
     <attribute name="avail" type="boolean" default="1" />
-    <attribute name="name" type="fee:commandTypeValue" />
-    <attribute name="phase" type="token" />
-    <attribute name="subphase" type="token" />
   </complexType>
 
   <!-- general transform (create, renew, update, transfer) command-->
@@ -121,32 +79,15 @@
     </sequence>
   </complexType>
 
-  <!-- general transform (create, renew, update, delete) result -->
+  <!-- general transform (create, renew, update) result -->
   <complexType name="transformResultType">
     <sequence>
-      <element name="currency" type="fee:currencyType" />
-      <element name="fee" type="fee:feeType"
-        minOccurs="0" maxOccurs="unbounded" />
-      <element name="credit" type="fee:creditType"
-        minOccurs="0" maxOccurs="unbounded" />
-      <element name="balance" type="fee:balanceType"
+      <element name="currency" type="fee:currencyType"
         minOccurs="0" />
-      <element name="creditLimit" type="fee:creditLimitType"
-        minOccurs="0" />
-    </sequence>
-  </complexType>
-
-  <!-- transfer result -->
-  <complexType name="transferResultType">
-    <sequence>
-      <element name="currency" type="fee:currencyType" />
-
-      <!-- only used op="query" responses -->
       <element name="period" type="domain:periodType"
         minOccurs="0" />
-
       <element name="fee" type="fee:feeType"
-        maxOccurs="unbounded" />
+        minOccurs="0" maxOccurs="unbounded" />
       <element name="credit" type="fee:creditType"
         minOccurs="0" maxOccurs="unbounded" />
       <element name="balance" type="fee:balanceType"
@@ -163,10 +104,50 @@
     </restriction>
   </simpleType>
 
-  <simpleType name="commandTypeValue">
+  <complexType name="commandType">
+    <sequence>
+      <element name="period" type="domain:periodType"
+        minOccurs="0" maxOccurs="1" />
+    </sequence>
+    <attribute name="name" type="fee:commandEnum" use="required"/>
+    <attribute name="customName" type="token"/>
+    <attribute name="phase" type="token" />
+    <attribute name="subphase" type="token" />
+  </complexType>
+
+  <complexType name="commandDataType">
+    <complexContent>
+      <extension base="fee:commandType">
+        <sequence>
+          <element name="fee" type="fee:feeType"
+            minOccurs="0" maxOccurs="unbounded" />
+          <element name="credit" type="fee:creditType"
+            minOccurs="0" maxOccurs="unbounded" />
+          <element name="reason" type="fee:reasonType"
+            minOccurs="0" />
+        </sequence>
+        <attribute name="standard" type="boolean" default="0" />
+      </extension>
+    </complexContent>
+  </complexType>
+
+  <complexType name="reasonType">
+    <simpleContent>
+      <extension base="token">
+        <attribute name="lang" type="language" default="en"/>
+      </extension>
+    </simpleContent>
+  </complexType>
+
+  <simpleType name="commandEnum">
     <restriction base="token">
-      <minLength value="3"/>
-      <maxLength value="16"/>
+      <enumeration value="create"/>
+      <enumeration value="delete"/>
+      <enumeration value="renew"/>
+      <enumeration value="update"/>
+      <enumeration value="transfer"/>
+      <enumeration value="restore"/>
+      <enumeration value="custom"/>
     </restriction>
   </simpleType>
 
@@ -186,9 +167,10 @@
     <simpleContent>
       <extension base="fee:nonNegativeDecimal">
         <attribute name="description"/>
+        <attribute name="lang" type="language" default="en"/>
         <attribute name="refundable" type="boolean" />
         <attribute name="grace-period" type="duration" />
-        <attribute name="applied" default="immediate">
+        <attribute name="applied">
           <simpleType>
             <restriction base="token">
               <enumeration value="immediate" />
@@ -204,6 +186,7 @@
     <simpleContent>
       <extension base="fee:negativeDecimal">
         <attribute name="description"/>
+        <attribute name="lang" type="language" default="en"/>
       </extension>
     </simpleContent>
   </complexType>

core/src/test/java/google/registry/flows/EppLoggedOutTest.java

@@ -14,7 +14,6 @@
 
 package google.registry.flows;
 
-import static org.joda.time.DateTimeZone.UTC;
 import static org.joda.time.format.ISODateTimeFormat.dateTimeNoMillis;
 
 import com.google.common.collect.ImmutableMap;
@@ -26,7 +25,7 @@ class EppLoggedOutTest extends EppTestCase {
 
   @Test
   void testHello() throws Exception {
-    DateTime now = DateTime.now(UTC);
+    DateTime now = clock.nowUtc();
     assertThatCommand("hello.xml", null)
         .atTime(now)
         .hasResponse("greeting.xml", ImmutableMap.of("DATE", now.toString(dateTimeNoMillis())));

core/src/test/java/google/registry/flows/FlowTestCase.java

@@ -36,6 +36,7 @@ import google.registry.flows.EppTestComponent.FakesAndMocksModule;
 import google.registry.flows.picker.FlowPicker;
 import google.registry.model.billing.BillingBase;
 import google.registry.model.domain.GracePeriod;
+import google.registry.model.eppcommon.EppXmlTransformer;
 import google.registry.model.eppcommon.ProtocolDefinition;
 import google.registry.model.eppinput.EppInput;
 import google.registry.model.eppoutput.EppOutput;
@@ -289,6 +290,8 @@ public abstract class FlowTestCase<F extends Flow> {
     if (output.isResponse()) {
       assertThat(output.isSuccess()).isTrue();
     }
+    // Verify that expected xml is syntatically correct.
+    EppXmlTransformer.validateOutput(xml);
     try {
       assertXmlEquals(
           xml, new String(marshal(output, ValidationMode.STRICT), UTF_8), ignoredPathsPlusTrid);

core/src/test/java/google/registry/flows/domain/DomainCheckFlowTest.java

@@ -77,9 +77,11 @@ import google.registry.model.billing.BillingRecurrence;
 import google.registry.model.domain.Domain;
 import google.registry.model.domain.DomainHistory;
 import google.registry.model.domain.fee.FeeQueryCommandExtensionItem.CommandName;
+import google.registry.model.domain.feestdv1.FeeCheckCommandExtensionStdV1.MultipleCurrenciesCannotBeCheckedException;
 import google.registry.model.domain.token.AllocationToken;
 import google.registry.model.domain.token.AllocationToken.TokenStatus;
 import google.registry.model.eppcommon.StatusValue;
+import google.registry.model.registrar.Registrar;
 import google.registry.model.reporting.HistoryEntry;
 import google.registry.model.reporting.HistoryEntry.HistoryEntryId;
 import google.registry.model.tld.Tld;
@@ -788,6 +790,31 @@ class DomainCheckFlowTest extends ResourceCheckFlowTestCase<DomainCheckFlow, Dom
     assertAboutEppExceptions().that(thrown).marshalsToXml();
   }
 
+  @Test
+  void testSuccess_multipleCurencies_v12() throws Exception {
+    persistResource(
+        createTld("example")
+            .asBuilder()
+            .setCurrency(JPY)
+            .setCreateBillingCostTransitions(
+                ImmutableSortedMap.of(START_OF_TIME, Money.ofMajor(JPY, 800)))
+            .setEapFeeSchedule(ImmutableSortedMap.of(START_OF_TIME, Money.ofMajor(JPY, 800)))
+            .setRenewBillingCostTransitions(
+                ImmutableSortedMap.of(START_OF_TIME, Money.ofMajor(JPY, 800)))
+            .setRegistryLockOrUnlockBillingCost(Money.ofMajor(JPY, 800))
+            .setServerStatusChangeBillingCost(Money.ofMajor(JPY, 800))
+            .setRestoreBillingCost(Money.ofMajor(JPY, 800))
+            .build());
+    persistResource(
+        Registrar.loadByRegistrarId("TheRegistrar")
+            .get()
+            .asBuilder()
+            .setBillingAccountMap(ImmutableMap.of(USD, "foo", JPY, "bar"))
+            .build());
+    setEppInput("domain_check_fee_multiple_currencies_v12.xml");
+    runFlowAssertResponse(loadFile("domain_check_fee_multiple_currencies_response_v12.xml"));
+  }
+
   @Test
   void testSuccess_superuserNotAuthorizedForTld() throws Exception {
     persistActiveDomain("example2.tld");
@@ -951,23 +978,34 @@ class DomainCheckFlowTest extends ResourceCheckFlowTestCase<DomainCheckFlow, Dom
     runFlowAssertResponse(loadFile("domain_check_fee_response_default_token_v11.xml"));
   }
 
-  @ParameterizedTest
-  @MethodSource("provideFeeTestParams")
-  void testFeeExtension_latest(String name, FeeFileLoader fileLoader) throws Exception {
+  @Test
+  void testFeeExtension_v12() throws Exception {
     persistActiveDomain("example1.tld");
-    setEppInputXml(fileLoader.load(this, "domain_check_fee_v12.xml"));
-    runFlowAssertResponse(fileLoader.load(this, "domain_check_fee_response_v12.xml"));
+    setEppInput("domain_check_fee_v12.xml");
+    runFlowAssertResponse(loadFile("domain_check_fee_response_v12.xml"));
   }
 
-  @ParameterizedTest
-  @MethodSource("provideFeeTestParams")
-  void testFeeExtension_defaultToken_latest(String name, FeeFileLoader fileLoader)
-      throws Exception {
+  @Test
+  void testFeeExtension_stdv1() throws Exception {
+    persistActiveDomain("example1.tld");
+    setEppInput("domain_check_fee_stdv1.xml");
+    runFlowAssertResponse(loadFile("domain_check_fee_response_stdv1.xml"));
+  }
+
+  @Test
+  void testFeeExtension_defaultToken_v12() throws Exception {
     setUpDefaultToken();
     persistActiveDomain("example1.tld");
-    setEppInputXml(
-        fileLoader.load(this, "domain_check_fee_v12.xml", ImmutableMap.of("CURRENCY", "USD")));
-    runFlowAssertResponse(fileLoader.load(this, "domain_check_fee_response_default_token_v12.xml"));
+    setEppInput("domain_check_fee_v12.xml", ImmutableMap.of("CURRENCY", "USD"));
+    runFlowAssertResponse(loadFile("domain_check_fee_response_default_token_v12.xml"));
+  }
+
+  @Test
+  void testFeeExtension_defaultToken_stdv1() throws Exception {
+    setUpDefaultToken();
+    persistActiveDomain("example1.tld");
+    setEppInput("domain_check_fee_stdv1.xml", ImmutableMap.of("CURRENCY", "USD"));
+    runFlowAssertResponse(loadFile("domain_check_fee_response_default_token_stdv1.xml"));
   }
 
   @Test
@@ -1017,18 +1055,20 @@ class DomainCheckFlowTest extends ResourceCheckFlowTestCase<DomainCheckFlow, Dom
 
   // Version 11 cannot have multiple commands.
 
-  @ParameterizedTest
-  @MethodSource("provideFeeTestParams")
-  void testFeeExtension_multipleCommands_latest(String name, FeeFileLoader loader)
-      throws Exception {
-    setEppInputXml(loader.load(this, "domain_check_fee_multiple_commands_v12.xml"));
-    runFlowAssertResponse(loader.load(this, "domain_check_fee_multiple_commands_response_v12.xml"));
+  @Test
+  void testFeeExtension_multipleCommands_v12() throws Exception {
+    setEppInput("domain_check_fee_multiple_commands_v12.xml");
+    runFlowAssertResponse(loadFile("domain_check_fee_multiple_commands_response_v12.xml"));
   }
 
-  @ParameterizedTest
-  @MethodSource("provideFeeTestParams")
-  void testFeeExtension_multipleCommands_tokenNotValidForSome_latest(
-      String name, FeeFileLoader loader) throws Exception {
+  @Test
+  void testFeeExtension_multipleCommands_std_v1() throws Exception {
+    setEppInput("domain_check_fee_multiple_commands_stdv1.xml");
+    runFlowAssertResponse(loadFile("domain_check_fee_multiple_commands_response_stdv1.xml"));
+  }
+
+  @Test
+  void testFeeExtension_multipleCommands_tokenNotValidForSome_v12() throws Exception {
     persistResource(
         new AllocationToken.Builder()
             .setToken("abc123")
@@ -1036,19 +1076,39 @@ class DomainCheckFlowTest extends ResourceCheckFlowTestCase<DomainCheckFlow, Dom
             .setAllowedEppActions(ImmutableSet.of(CommandName.CREATE, CommandName.TRANSFER))
             .setDiscountFraction(0.1)
             .build());
-    setEppInputXml(loader.load(this, "domain_check_fee_multiple_commands_allocationtoken_v12.xml"));
+    setEppInput("domain_check_fee_multiple_commands_allocationtoken_v12.xml");
     runFlowAssertResponse(
-        loader.load(this, "domain_check_fee_multiple_commands_allocationtoken_response_v12.xml"));
+        loadFile("domain_check_fee_multiple_commands_allocationtoken_response_v12.xml"));
   }
 
-  @ParameterizedTest
-  @MethodSource("provideFeeTestParams")
-  void testFeeExtension_multipleCommands_defaultTokenOnlyOnCreate_latest(
-      String name, FeeFileLoader loader) throws Exception {
-    setUpDefaultToken();
-    setEppInputXml(loader.load(this, "domain_check_fee_multiple_commands_v12.xml"));
+  @Test
+  void testFeeExtension_multipleCommands_tokenNotValidForSome_std_v1() throws Exception {
+    persistResource(
+        new AllocationToken.Builder()
+            .setToken("abc123")
+            .setTokenType(UNLIMITED_USE)
+            .setAllowedEppActions(ImmutableSet.of(CommandName.CREATE, CommandName.TRANSFER))
+            .setDiscountFraction(0.1)
+            .build());
+    setEppInput("domain_check_fee_multiple_commands_allocationtoken_stdv1.xml");
     runFlowAssertResponse(
-        loader.load(this, "domain_check_fee_multiple_commands_default_token_response_v12.xml"));
+        loadFile("domain_check_fee_multiple_commands_allocationtoken_response_stdv1.xml"));
+  }
+
+  @Test
+  void testFeeExtension_multipleCommands_defaultTokenOnlyOnCreate_v12() throws Exception {
+    setUpDefaultToken();
+    setEppInput("domain_check_fee_multiple_commands_v12.xml");
+    runFlowAssertResponse(
+        loadFile("domain_check_fee_multiple_commands_default_token_response_v12.xml"));
+  }
+
+  @Test
+  void testFeeExtension_multipleCommands_defaultTokenOnlyOnCreate_std_v1() throws Exception {
+    setUpDefaultToken();
+    setEppInput("domain_check_fee_multiple_commands_stdv1.xml");
+    runFlowAssertResponse(
+        loadFile("domain_check_fee_multiple_commands_default_token_response_stdv1.xml"));
   }
 
   @Disabled("TODO(b/454680236): broken test")
@@ -1316,33 +1376,47 @@ class DomainCheckFlowTest extends ResourceCheckFlowTestCase<DomainCheckFlow, Dom
     runFlowAssertResponse(loadFile("domain_check_fee_premium_response_v11_update.xml"));
   }
 
-  @ParameterizedTest
-  @MethodSource("provideFeeTestParams")
-  void testFeeExtension_premiumLabels_latest(String name, FeeFileLoader loader) throws Exception {
+  @Test
+  void testFeeExtension_premiumLabels_v12() throws Exception {
     createTld("example");
-    setEppInputXml(loader.load(this, "domain_check_fee_premium_v12.xml"));
-    runFlowAssertResponse(loader.load(this, "domain_check_fee_premium_response_v12.xml"));
+    setEppInput("domain_check_fee_premium_v12.xml");
+    runFlowAssertResponse(loadFile("domain_check_fee_premium_response_v12.xml"));
   }
 
-  @ParameterizedTest
-  @MethodSource("provideFeeTestParams")
-  void testFeeExtension_premiumLabels_v12_specifiedPriceRenewal_renewPriceOnly(
-      String name, FeeFileLoader loader) throws Exception {
+  @Test
+  void testFeeExtension_premiumLabels_std_v1() throws Exception {
+    createTld("example");
+    setEppInput("domain_check_fee_premium_stdv1.xml");
+    runFlowAssertResponse(loadFile("domain_check_fee_premium_response_stdv1.xml"));
+  }
+
+  @Test
+  void testFeeExtension_premiumLabels_v12_specifiedPriceRenewal_renewPriceOnly() throws Exception {
     createTld("example");
     persistBillingRecurrenceForDomain(
         persistActiveDomain("rich.example"), SPECIFIED, Money.of(USD, new BigDecimal("27.74")));
-    setEppInputXml(loader.load(this, "domain_check_fee_premium_v12_renew_only.xml"));
+    setEppInput("domain_check_fee_premium_v12_renew_only.xml");
     runFlowAssertResponse(
-        loader.load(
-            this,
+        loadFile(
             "domain_check_fee_premium_response_v12_renew_only.xml",
             ImmutableMap.of("RENEWPRICE", "27.74")));
   }
 
-  @ParameterizedTest
-  @MethodSource("provideFeeTestParams")
-  void testFeeExtension_premiumLabels_doesNotApplyDefaultToken_latest(
-      String name, FeeFileLoader loader) throws Exception {
+  @Test
+  void testFeeExtension_premiumLabels_std_v1_specifiedPriceRenewal_renewPriceOnly()
+      throws Exception {
+    createTld("example");
+    persistBillingRecurrenceForDomain(
+        persistActiveDomain("rich.example"), SPECIFIED, Money.of(USD, new BigDecimal("27.74")));
+    setEppInput("domain_check_fee_premium_stdv1_renew_only.xml");
+    runFlowAssertResponse(
+        loadFile(
+            "domain_check_fee_premium_response_stdv1_renew_only.xml",
+            ImmutableMap.of("RENEWPRICE", "27.74")));
+  }
+
+  @Test
+  void testFeeExtension_premiumLabels_doesNotApplyDefaultToken_v12() throws Exception {
     createTld("example");
     AllocationToken defaultToken =
         persistResource(
@@ -1359,19 +1433,46 @@ class DomainCheckFlowTest extends ResourceCheckFlowTestCase<DomainCheckFlow, Dom
             .asBuilder()
             .setDefaultPromoTokens(ImmutableList.of(defaultToken.createVKey()))
             .build());
-    setEppInputXml(loader.load(this, "domain_check_fee_premium_v12.xml"));
-    runFlowAssertResponse(loader.load(this, "domain_check_fee_premium_response_v12.xml"));
+    setEppInput("domain_check_fee_premium_v12.xml");
+    runFlowAssertResponse(loadFile("domain_check_fee_premium_response_v12.xml"));
   }
 
-  @ParameterizedTest
-  @MethodSource("provideFeeTestParams")
-  void testFeeExtension_premiumLabels_v12_withRenewalOnRestore(String name, FeeFileLoader loader)
-      throws Exception {
+  @Test
+  void testFeeExtension_premiumLabels_doesNotApplyDefaultToken_std_v1() throws Exception {
     createTld("example");
-    setEppInputXml(loader.load(this, "domain_check_fee_premium_v12.xml"));
+    AllocationToken defaultToken =
+        persistResource(
+            new AllocationToken.Builder()
+                .setToken("bbbbb")
+                .setTokenType(DEFAULT_PROMO)
+                .setAllowedRegistrarIds(ImmutableSet.of("TheRegistrar"))
+                .setAllowedTlds(ImmutableSet.of("example"))
+                .setDiscountPremiums(false)
+                .setDiscountFraction(0.5)
+                .build());
+    persistResource(
+        Tld.get("example")
+            .asBuilder()
+            .setDefaultPromoTokens(ImmutableList.of(defaultToken.createVKey()))
+            .build());
+    setEppInput("domain_check_fee_premium_stdv1.xml");
+    runFlowAssertResponse(loadFile("domain_check_fee_premium_response_stdv1.xml"));
+  }
+
+  @Test
+  void testFeeExtension_premiumLabels_v12_withRenewalOnRestore() throws Exception {
+    createTld("example");
+    setEppInput("domain_check_fee_premium_v12.xml");
     persistPendingDeleteDomain("rich.example");
-    runFlowAssertResponse(
-        loader.load(this, "domain_check_fee_premium_response_v12_with_renewal.xml"));
+    runFlowAssertResponse(loadFile("domain_check_fee_premium_response_v12_with_renewal.xml"));
+  }
+
+  @Test
+  void testFeeExtension_premiumLabels_std_v1_withRenewalOnRestore() throws Exception {
+    createTld("example");
+    setEppInput("domain_check_fee_premium_stdv1.xml");
+    persistPendingDeleteDomain("rich.example");
+    runFlowAssertResponse(loadFile("domain_check_fee_premium_response_stdv1_with_renewal.xml"));
   }
 
   @Test
@@ -1482,23 +1583,32 @@ class DomainCheckFlowTest extends ResourceCheckFlowTestCase<DomainCheckFlow, Dom
         loadFile("domain_check_fee_reserved_response_v11_restore_with_renewals.xml"));
   }
 
-  @ParameterizedTest
-  @MethodSource("provideFeeTestParams")
-  void testFeeExtension_reservedName_latest(String name, FeeFileLoader loader) throws Exception {
+  @Test
+  void testFeeExtension_reservedName_v12() throws Exception {
     persistResource(
         Tld.get("tld")
             .asBuilder()
             .setReservedLists(createReservedList())
             .setPremiumList(persistPremiumList("tld", USD, "premiumcollision,USD 70"))
             .build());
-    setEppInputXml(loader.load(this, "domain_check_fee_reserved_v12.xml"));
-    runFlowAssertResponse(loader.load(this, "domain_check_fee_reserved_response_v12.xml"));
+    setEppInput("domain_check_fee_reserved_v12.xml");
+    runFlowAssertResponse(loadFile("domain_check_fee_reserved_response_v12.xml"));
   }
 
-  @ParameterizedTest
-  @MethodSource("provideFeeTestParams")
-  void testFeeExtension_reservedName_restoreFeeWithDupes_latest(String name, FeeFileLoader loader)
-      throws Exception {
+  @Test
+  void testFeeExtension_reservedName_std_v1() throws Exception {
+    persistResource(
+        Tld.get("tld")
+            .asBuilder()
+            .setReservedLists(createReservedList())
+            .setPremiumList(persistPremiumList("tld", USD, "premiumcollision,USD 70"))
+            .build());
+    setEppInput("domain_check_fee_reserved_stdv1.xml");
+    runFlowAssertResponse(loadFile("domain_check_fee_reserved_response_stdv1.xml"));
+  }
+
+  @Test
+  void testFeeExtension_reservedName_restoreFeeWithDupes_v12() throws Exception {
     persistResource(
         Tld.get("tld")
             .asBuilder()
@@ -1506,9 +1616,23 @@ class DomainCheckFlowTest extends ResourceCheckFlowTestCase<DomainCheckFlow, Dom
             .setPremiumList(persistPremiumList("tld", USD, "premiumcollision,USD 70"))
             .build());
     // The domain needs to exist in order for it to be loaded to check for restore fee.
-    setEppInputXml(loader.load(this, "domain_check_fee_reserved_dupes_v12.xml"));
+    setEppInput("domain_check_fee_reserved_dupes_v12.xml");
     persistBillingRecurrenceForDomain(persistActiveDomain("allowedinsunrise.tld"), DEFAULT, null);
-    runFlowAssertResponse(loader.load(this, "domain_check_fee_reserved_dupes_response_v12.xml"));
+    runFlowAssertResponse(loadFile("domain_check_fee_reserved_dupes_response_v12.xml"));
+  }
+
+  @Test
+  void testFeeExtension_reservedName_restoreFeeWithDupes_std_v1() throws Exception {
+    persistResource(
+        Tld.get("tld")
+            .asBuilder()
+            .setReservedLists(createReservedList())
+            .setPremiumList(persistPremiumList("tld", USD, "premiumcollision,USD 70"))
+            .build());
+    // The domain needs to exist in order for it to be loaded to check for restore fee.
+    setEppInput("domain_check_fee_reserved_dupes_stdv1.xml");
+    persistBillingRecurrenceForDomain(persistActiveDomain("allowedinsunrise.tld"), DEFAULT, null);
+    runFlowAssertResponse(loadFile("domain_check_fee_reserved_dupes_response_stdv1.xml"));
   }
 
   @Test
@@ -1595,10 +1719,8 @@ class DomainCheckFlowTest extends ResourceCheckFlowTestCase<DomainCheckFlow, Dom
     runFlowAssertResponse(loadFile("domain_check_fee_reserved_sunrise_response_v11_restore.xml"));
   }
 
-  @ParameterizedTest
-  @MethodSource("provideFeeTestParams")
-  void testFeeExtension_feesNotOmittedOnReservedNamesInSunrise_latest(
-      String name, FeeFileLoader loader) throws Exception {
+  @Test
+  void testFeeExtension_feesNotOmittedOnReservedNamesInSunrise_v12() throws Exception {
     createTld("tld", START_DATE_SUNRISE);
     persistResource(
         Tld.get("tld")
@@ -1606,8 +1728,21 @@ class DomainCheckFlowTest extends ResourceCheckFlowTestCase<DomainCheckFlow, Dom
             .setReservedLists(createReservedList())
             .setPremiumList(persistPremiumList("tld", USD, "premiumcollision,USD 70"))
             .build());
-    setEppInputXml(loader.load(this, "domain_check_fee_reserved_v12.xml"));
-    runFlowAssertResponse(loader.load(this, "domain_check_fee_reserved_sunrise_response_v12.xml"));
+    setEppInput("domain_check_fee_reserved_v12.xml");
+    runFlowAssertResponse(loadFile("domain_check_fee_reserved_sunrise_response_v12.xml"));
+  }
+
+  @Test
+  void testFeeExtension_feesNotOmittedOnReservedNamesInSunrise_std_v1() throws Exception {
+    createTld("tld", START_DATE_SUNRISE);
+    persistResource(
+        Tld.get("tld")
+            .asBuilder()
+            .setReservedLists(createReservedList())
+            .setPremiumList(persistPremiumList("tld", USD, "premiumcollision,USD 70"))
+            .build());
+    setEppInput("domain_check_fee_reserved_stdv1.xml");
+    runFlowAssertResponse(loadFile("domain_check_fee_reserved_sunrise_response_stdv1.xml"));
   }
 
   @Test
@@ -1794,14 +1929,47 @@ class DomainCheckFlowTest extends ResourceCheckFlowTestCase<DomainCheckFlow, Dom
     assertAboutEppExceptions().that(thrown).marshalsToXml();
   }
 
-  @ParameterizedTest
-  @MethodSource("provideFeeTestParams")
-  void testFeeExtension_invalidCommand_latest(String name, FeeFileLoader loader) {
-    setEppInputXml(loader.load(this, "domain_check_fee_invalid_command_v12.xml"));
+  @Test
+  void testFeeExtension_invalidCommand_v12() {
+    setEppInput("domain_check_fee_invalid_command_v12.xml");
     EppException thrown = assertThrows(UnknownFeeCommandException.class, this::runFlow);
     assertAboutEppExceptions().that(thrown).marshalsToXml();
   }
 
+  @Test
+  void testFeeExtension_invalidCommand_std_v1() {
+    setEppInput("domain_check_fee_invalid_command_stdv1.xml");
+    EppException thrown = assertThrows(UnknownFeeCommandException.class, this::runFlow);
+    assertAboutEppExceptions().that(thrown).marshalsToXml();
+  }
+
+  @Test
+  void testFeeExtension_invalid_multipleCurrencies_std_v1() {
+    persistResource(
+        createTld("example")
+            .asBuilder()
+            .setCurrency(JPY)
+            .setCreateBillingCostTransitions(
+                ImmutableSortedMap.of(START_OF_TIME, Money.ofMajor(JPY, 800)))
+            .setEapFeeSchedule(ImmutableSortedMap.of(START_OF_TIME, Money.ofMajor(JPY, 800)))
+            .setRenewBillingCostTransitions(
+                ImmutableSortedMap.of(START_OF_TIME, Money.ofMajor(JPY, 800)))
+            .setRegistryLockOrUnlockBillingCost(Money.ofMajor(JPY, 800))
+            .setServerStatusChangeBillingCost(Money.ofMajor(JPY, 800))
+            .setRestoreBillingCost(Money.ofMajor(JPY, 800))
+            .build());
+    persistResource(
+        Registrar.loadByRegistrarId("TheRegistrar")
+            .get()
+            .asBuilder()
+            .setBillingAccountMap(ImmutableMap.of(USD, "foo", JPY, "bar"))
+            .build());
+    setEppInput("domain_check_fee_multiple_currencies_stdv1.xml");
+    assertAboutEppExceptions()
+        .that(assertThrows(MultipleCurrenciesCannotBeCheckedException.class, this::runFlow))
+        .marshalsToXml();
+  }
+
   @Test
   void testSuccess_eapFeeCheck_v06() throws Exception {
     runEapFeeCheckTest(
@@ -1834,21 +2002,11 @@ class DomainCheckFlowTest extends ResourceCheckFlowTestCase<DomainCheckFlow, Dom
         new FeeFileLoader(/* isFeeStdV1= */ false));
   }
 
-  @Disabled("v1.0 buggy")
   @Test
   void testSuccess_eapFeeCheck_std_v1() throws Exception {
     runEapFeeCheckTest(
-        "domain_check_fee_v12.xml",
-        "domain_check_eap_fee_response_v12.xml",
-        new FeeFileLoader(/* isFeeStdV1= */ true));
-  }
-
-  @Disabled("v1.0 buggy")
-  @Test
-  void testSuccess_eapFeeCheck_date_std_v1() throws Exception {
-    runEapFeeCheckTest(
-        "domain_check_fee_date_v12.xml",
-        "domain_check_eap_fee_response_date_v12.xml",
+        "domain_check_fee_stdv1.xml",
+        "domain_check_eap_fee_response_stdv1.xml",
         new FeeFileLoader(/* isFeeStdV1= */ true));
   }
 
@@ -2003,10 +2161,14 @@ class DomainCheckFlowTest extends ResourceCheckFlowTestCase<DomainCheckFlow, Dom
     }
   }
 
+  /**
+   * Fee versions 0.12 and 1.0 are the same in how they're requested (though not in the responses.
+   * As a result, for tests that throw an exception, we can use the same XML content.
+   */
   @SuppressWarnings("unused")
   private static Stream<Arguments> provideFeeTestParams() {
     return Stream.of(
-        // Arguments.of("fee_std_v1", new FeeFileLoader(true)),
+        Arguments.of("fee_std_v1", new FeeFileLoader(true)),
         Arguments.of("fee_12", new FeeFileLoader(false)));
   }
 }

core/src/test/java/google/registry/flows/domain/DomainUpdateFlowTest.java

@@ -63,11 +63,11 @@ import google.registry.config.RegistryConfig;
 import google.registry.flows.EppException;
 import google.registry.flows.EppException.UnimplementedExtensionException;
 import google.registry.flows.EppRequestSource;
-import google.registry.flows.FlowTestCase.CommitMode;
-import google.registry.flows.FlowTestCase.UserPrivileges;
 import google.registry.flows.FlowUtils.NotLoggedInException;
 import google.registry.flows.ResourceFlowTestCase;
+import google.registry.flows.ResourceFlowUtils.AddExistingValueException;
 import google.registry.flows.ResourceFlowUtils.AddRemoveSameValueException;
+import google.registry.flows.ResourceFlowUtils.RemoveNonexistentValueException;
 import google.registry.flows.ResourceFlowUtils.ResourceDoesNotExistException;
 import google.registry.flows.ResourceFlowUtils.ResourceNotOwnedException;
 import google.registry.flows.ResourceFlowUtils.StatusNotClientSettableException;
@@ -452,6 +452,7 @@ class DomainUpdateFlowTest extends ResourceFlowTestCase<DomainUpdateFlow, Domain
 
   @Test
   void testSuccess_removeClientUpdateProhibited() throws Exception {
+    setEppInput("domain_update_remove_client_update_prohibited.xml");
     persistReferencedEntities();
     persistResource(
         persistDomain()
@@ -547,21 +548,26 @@ class DomainUpdateFlowTest extends ResourceFlowTestCase<DomainUpdateFlow, Domain
   }
 
   @Test
-  void testSuccess_secDnsAddSameDoesNothing() throws Exception {
-    doSecDnsSuccessfulTest(
-        "domain_update_dsdata_add.xml",
-        ImmutableSet.of(SOME_DSDATA),
-        ImmutableSet.of(SOME_DSDATA),
-        ImmutableMap.of(
-            "KEY_TAG",
-            "1",
-            "ALG",
-            "2",
-            "DIGEST_TYPE",
-            "2",
-            "DIGEST",
-            "9F86D081884C7D659A2FEAA0C55AD015A3BF4F1B2B0B822CD15D6C15B0F00A08"),
-        false);
+  void testFailure_secDnsAddSame_throwsException() throws Exception {
+    EppException thrown =
+        assertThrows(
+            AddExistingValueException.class,
+            () ->
+                doSecDnsSuccessfulTest(
+                    "domain_update_dsdata_add.xml",
+                    ImmutableSet.of(SOME_DSDATA),
+                    ImmutableSet.of(SOME_DSDATA),
+                    ImmutableMap.of(
+                        "KEY_TAG",
+                        "1",
+                        "ALG",
+                        "2",
+                        "DIGEST_TYPE",
+                        "2",
+                        "DIGEST",
+                        "9F86D081884C7D659A2FEAA0C55AD015A3BF4F1B2B0B822CD15D6C15B0F00A08"),
+                    false));
+    assertAboutEppExceptions().that(thrown).marshalsToXml();
   }
 
   @Test
@@ -679,7 +685,7 @@ class DomainUpdateFlowTest extends ResourceFlowTestCase<DomainUpdateFlow, Domain
                 2,
                 2,
                 base16()
-                    .decode("9F86D081884C7D659A2FEAA0C55AD015A3BF4F1B2B0B822CD15D6C15B0F00A08"))),
+                    .decode("0F86D081884C7D659A2FEAA0C55AD015A3BF4F1B2B0B822CD15D6C15B0F00A08"))),
         ImmutableMap.of(
             "KEY_TAG",
             "1",
@@ -688,8 +694,8 @@ class DomainUpdateFlowTest extends ResourceFlowTestCase<DomainUpdateFlow, Domain
             "DIGEST_TYPE",
             "2",
             "DIGEST",
-            "9F86D081884C7D659A2FEAA0C55AD015A3BF4F1B2B0B822CD15D6C15B0F00A08"),
-        false);
+            "0F86D081884C7D659A2FEAA0C55AD015A3BF4F1B2B0B822CD15D6C15B0F00A08"),
+        true);
   }
 
   @Test
@@ -797,29 +803,43 @@ class DomainUpdateFlowTest extends ResourceFlowTestCase<DomainUpdateFlow, Domain
   }
 
   @Test
-  void testSuccess_secDnsAddRemoveSame() throws Exception {
-    // Adding and removing the same dsData is a no-op because removes are processed first.
-    doSecDnsSuccessfulTest(
-        "domain_update_dsdata_add_rem_same.xml",
-        ImmutableSet.of(
-            SOME_DSDATA,
-            DomainDsData.create(
-                12345, 3, 1, base16().decode("A94A8FE5CCB19BA61C4C0873D391E987982FBBD3"))),
-        ImmutableSet.of(
-            SOME_DSDATA,
-            DomainDsData.create(
-                12345, 3, 1, base16().decode("A94A8FE5CCB19BA61C4C0873D391E987982FBBD3"))),
-        false);
+  void testFailure_secDnsAddRemoveSame_throwsException() throws Exception {
+    EppException thrown =
+        assertThrows(
+            AddRemoveSameValueException.class,
+            () ->
+                doSecDnsSuccessfulTest(
+                    "domain_update_dsdata_add_rem_same.xml",
+                    ImmutableSet.of(
+                        SOME_DSDATA,
+                        DomainDsData.create(
+                            12345,
+                            3,
+                            1,
+                            base16().decode("A94A8FE5CCB19BA61C4C0873D391E987982FBBD3"))),
+                    ImmutableSet.of(
+                        SOME_DSDATA,
+                        DomainDsData.create(
+                            12345,
+                            3,
+                            1,
+                            base16().decode("A94A8FE5CCB19BA61C4C0873D391E987982FBBD3"))),
+                    false));
+    assertAboutEppExceptions().that(thrown).marshalsToXml();
   }
 
   @Test
-  void testSuccess_secDnsRemoveAlreadyNotThere() throws Exception {
-    // Removing a dsData that isn't there is a no-op.
-    doSecDnsSuccessfulTest(
-        "domain_update_dsdata_rem.xml",
-        ImmutableSet.of(SOME_DSDATA),
-        ImmutableSet.of(SOME_DSDATA),
-        false);
+  void testFailure_secDnsRemoveAlreadyNotThere_throwsException() throws Exception {
+    EppException thrown =
+        assertThrows(
+            RemoveNonexistentValueException.class,
+            () ->
+                doSecDnsSuccessfulTest(
+                    "domain_update_dsdata_rem.xml",
+                    ImmutableSet.of(SOME_DSDATA),
+                    ImmutableSet.of(SOME_DSDATA),
+                    false));
+    assertAboutEppExceptions().that(thrown).marshalsToXml();
   }
 
   void doServerStatusBillingTest(String xmlFilename, boolean isBillable) throws Exception {
@@ -854,14 +874,6 @@ class DomainUpdateFlowTest extends ResourceFlowTestCase<DomainUpdateFlow, Domain
     doServerStatusBillingTest("domain_update_add_server_status.xml", true);
   }
 
-  @Test
-  void testSuccess_noBillingOnPreExistingServerStatus() throws Exception {
-    eppRequestSource = EppRequestSource.TOOL;
-    Domain addStatusDomain = persistActiveDomain(getUniqueIdFromCommand());
-    persistResource(addStatusDomain.asBuilder().addStatusValue(SERVER_RENEW_PROHIBITED).build());
-    doServerStatusBillingTest("domain_update_add_server_status.xml", false);
-  }
-
   @Test
   void testSuccess_removeServerStatusBillingEvent() throws Exception {
     eppRequestSource = EppRequestSource.TOOL;
@@ -1373,6 +1385,52 @@ class DomainUpdateFlowTest extends ResourceFlowTestCase<DomainUpdateFlow, Domain
     assertAboutEppExceptions().that(thrown).marshalsToXml();
   }
 
+  @Test
+  void testFailure_addExistingNameserver() throws Exception {
+    Host host = persistActiveHost("ns2.example.foo");
+    persistResource(
+        DatabaseHelper.newDomain(getUniqueIdFromCommand())
+            .asBuilder()
+            .setNameservers(ImmutableSet.of(host.createVKey()))
+            .build());
+    setEppInput("domain_update_add_nameserver.xml");
+    assertAboutEppExceptions()
+        .that(assertThrows(AddExistingValueException.class, this::runFlow))
+        .marshalsToXml();
+  }
+
+  @Test
+  void testFailure_addExistingStatusValue() throws Exception {
+    persistResource(
+        DatabaseHelper.newDomain(getUniqueIdFromCommand())
+            .asBuilder()
+            .setStatusValues(ImmutableSet.of(CLIENT_RENEW_PROHIBITED))
+            .build());
+    setEppInput("domain_update_add_non_server_status.xml");
+    assertAboutEppExceptions()
+        .that(assertThrows(AddExistingValueException.class, this::runFlow))
+        .marshalsToXml();
+  }
+
+  @Test
+  void testFailure_removeNonexistentNameserver() throws Exception {
+    persistActiveDomain(getUniqueIdFromCommand());
+    persistActiveHost("ns1.example.foo");
+    setEppInput("domain_update_remove_nameserver.xml");
+    assertAboutEppExceptions()
+        .that(assertThrows(RemoveNonexistentValueException.class, this::runFlow))
+        .marshalsToXml();
+  }
+
+  @Test
+  void testFailure_removeNonexistentStatusValue() throws Exception {
+    persistActiveDomain(getUniqueIdFromCommand());
+    setEppInput("domain_update_remove_client_update_prohibited.xml");
+    assertAboutEppExceptions()
+        .that(assertThrows(RemoveNonexistentValueException.class, this::runFlow))
+        .marshalsToXml();
+  }
+
   @Test
   void testFailure_minimumDataset_addingNewRegistrantFails() throws Exception {
     persistReferencedEntities();

core/src/test/java/google/registry/flows/host/HostCreateFlowTest.java

@@ -45,6 +45,7 @@ import google.registry.flows.host.HostFlowUtils.HostNameNotNormalizedException;
 import google.registry.flows.host.HostFlowUtils.HostNameNotPunyCodedException;
 import google.registry.flows.host.HostFlowUtils.HostNameTooLongException;
 import google.registry.flows.host.HostFlowUtils.HostNameTooShallowException;
+import google.registry.flows.host.HostFlowUtils.LoopbackIpNotValidForHostException;
 import google.registry.flows.host.HostFlowUtils.SuperordinateDomainDoesNotExistException;
 import google.registry.flows.host.HostFlowUtils.SuperordinateDomainInPendingDeleteException;
 import google.registry.model.ForeignKeyUtils;
@@ -322,6 +323,26 @@ class HostCreateFlowTest extends ResourceFlowTestCase<HostCreateFlow, Host> {
     assertAboutEppExceptions().that(thrown).marshalsToXml();
   }
 
+  @Test
+  void testFailure_localhostInetAddress_ipv4() {
+    createTld("tld");
+    persistActiveDomain("example.tld");
+    setEppHostCreateInput("ns1.example.tld", "<host:addr ip=\"v4\">127.0.0.1</host:addr>");
+    assertAboutEppExceptions()
+        .that(assertThrows(LoopbackIpNotValidForHostException.class, this::runFlow))
+        .marshalsToXml();
+  }
+
+  @Test
+  void testFailure_localhostInetAddress_ipv6() {
+    createTld("tld");
+    persistActiveDomain("example.tld");
+    setEppHostCreateInput("ns1.example.tld", "<host:addr ip=\"v6\">::1</host:addr>");
+    assertAboutEppExceptions()
+        .that(assertThrows(LoopbackIpNotValidForHostException.class, this::runFlow))
+        .marshalsToXml();
+  }
+
   @Test
   void testIcannActivityReportField_getsLogged() throws Exception {
     runFlow();

core/src/test/java/google/registry/flows/host/HostUpdateFlowTest.java

@@ -48,7 +48,9 @@ import google.registry.flows.EppException;
 import google.registry.flows.EppRequestSource;
 import google.registry.flows.FlowUtils.NotLoggedInException;
 import google.registry.flows.ResourceFlowTestCase;
+import google.registry.flows.ResourceFlowUtils.AddExistingValueException;
 import google.registry.flows.ResourceFlowUtils.AddRemoveSameValueException;
+import google.registry.flows.ResourceFlowUtils.RemoveNonexistentValueException;
 import google.registry.flows.ResourceFlowUtils.ResourceDoesNotExistException;
 import google.registry.flows.ResourceFlowUtils.ResourceNotOwnedException;
 import google.registry.flows.ResourceFlowUtils.StatusNotClientSettableException;
@@ -61,6 +63,7 @@ import google.registry.flows.host.HostFlowUtils.HostNameNotNormalizedException;
 import google.registry.flows.host.HostFlowUtils.HostNameNotPunyCodedException;
 import google.registry.flows.host.HostFlowUtils.HostNameTooLongException;
 import google.registry.flows.host.HostFlowUtils.HostNameTooShallowException;
+import google.registry.flows.host.HostFlowUtils.LoopbackIpNotValidForHostException;
 import google.registry.flows.host.HostFlowUtils.SuperordinateDomainDoesNotExistException;
 import google.registry.flows.host.HostFlowUtils.SuperordinateDomainInPendingDeleteException;
 import google.registry.flows.host.HostUpdateFlow.CannotAddIpToExternalHostException;
@@ -521,6 +524,8 @@ class HostUpdateFlowTest extends ResourceFlowTestCase<HostUpdateFlow, Host> {
             .asBuilder()
             .setSuperordinateDomain(foo.createVKey())
             .setLastTransferTime(null)
+            .setInetAddresses(
+                ImmutableSet.of(InetAddresses.forString("1080:0:0:0:8:800:200C:417A")))
             .build());
     persistResource(foo.asBuilder().setSubordinateHosts(ImmutableSet.of(oldHostName())).build());
     clock.advanceOneMilli();
@@ -560,6 +565,8 @@ class HostUpdateFlowTest extends ResourceFlowTestCase<HostUpdateFlow, Host> {
                 .setSuperordinateDomain(domain.createVKey())
                 .setLastTransferTime(clock.nowUtc().minusDays(20))
                 .setLastSuperordinateChange(clock.nowUtc().minusDays(3))
+                .setInetAddresses(
+                    ImmutableSet.of(InetAddresses.forString("1080:0:0:0:8:800:200C:417A")))
                 .build());
     DateTime lastTransferTime = host.getLastTransferTime();
     persistResource(domain.asBuilder().setSubordinateHosts(ImmutableSet.of(oldHostName())).build());
@@ -597,6 +604,8 @@ class HostUpdateFlowTest extends ResourceFlowTestCase<HostUpdateFlow, Host> {
             .setSuperordinateDomain(foo.createVKey())
             .setLastTransferTime(lastTransferTime)
             .setLastSuperordinateChange(clock.nowUtc().minusDays(3))
+            .setInetAddresses(
+                ImmutableSet.of(InetAddresses.forString("1080:0:0:0:8:800:200C:417A")))
             .build());
     persistResource(foo.asBuilder().setSubordinateHosts(ImmutableSet.of(oldHostName())).build());
     clock.advanceOneMilli();
@@ -631,6 +640,8 @@ class HostUpdateFlowTest extends ResourceFlowTestCase<HostUpdateFlow, Host> {
             .setSuperordinateDomain(foo.createVKey())
             .setLastTransferTime(lastTransferTime)
             .setLastSuperordinateChange(clock.nowUtc().minusDays(10))
+            .setInetAddresses(
+                ImmutableSet.of(InetAddresses.forString("1080:0:0:0:8:800:200C:417A")))
             .build());
     persistResource(foo.asBuilder().setSubordinateHosts(ImmutableSet.of(oldHostName())).build());
     clock.advanceOneMilli();
@@ -665,6 +676,8 @@ class HostUpdateFlowTest extends ResourceFlowTestCase<HostUpdateFlow, Host> {
             .setSuperordinateDomain(foo.createVKey())
             .setLastTransferTime(null)
             .setLastSuperordinateChange(clock.nowUtc().minusDays(3))
+            .setInetAddresses(
+                ImmutableSet.of(InetAddresses.forString("1080:0:0:0:8:800:200C:417A")))
             .build());
     persistResource(foo.asBuilder().setSubordinateHosts(ImmutableSet.of(oldHostName())).build());
     Host renamedHost = doSuccessfulTest();
@@ -686,7 +699,12 @@ class HostUpdateFlowTest extends ResourceFlowTestCase<HostUpdateFlow, Host> {
     createTld("foo");
     Domain domain = persistActiveDomain("example.foo");
     persistResource(
-        newHost(oldHostName()).asBuilder().setSuperordinateDomain(domain.createVKey()).build());
+        newHost(oldHostName())
+            .asBuilder()
+            .setSuperordinateDomain(domain.createVKey())
+            .setInetAddresses(
+                ImmutableSet.of(InetAddresses.forString("1080:0:0:0:8:800:200C:417A")))
+            .build());
     DateTime lastTransferTime = clock.nowUtc().minusDays(2);
     persistResource(
         domain
@@ -727,6 +745,8 @@ class HostUpdateFlowTest extends ResourceFlowTestCase<HostUpdateFlow, Host> {
             .setSuperordinateDomain(domain.createVKey())
             .setLastTransferTime(lastTransferTime)
             .setLastSuperordinateChange(clock.nowUtc().minusDays(4))
+            .setInetAddresses(
+                ImmutableSet.of(InetAddresses.forString("1080:0:0:0:8:800:200C:417A")))
             .build());
     persistResource(
         domain
@@ -762,6 +782,8 @@ class HostUpdateFlowTest extends ResourceFlowTestCase<HostUpdateFlow, Host> {
             .setSuperordinateDomain(domain.createVKey())
             .setLastTransferTime(clock.nowUtc().minusDays(12))
             .setLastSuperordinateChange(clock.nowUtc().minusDays(4))
+            .setInetAddresses(
+                ImmutableSet.of(InetAddresses.forString("1080:0:0:0:8:800:200C:417A")))
             .build());
     domain =
         persistResource(
@@ -1006,6 +1028,50 @@ class HostUpdateFlowTest extends ResourceFlowTestCase<HostUpdateFlow, Host> {
     assertAboutEppExceptions().that(thrown).marshalsToXml();
   }
 
+  @Test
+  void testFailure_addExistingInetAddress() throws Exception {
+    createTld("tld");
+    Domain domain = persistActiveDomain("example.tld");
+    persistResource(
+        newHost(oldHostName())
+            .asBuilder()
+            .setSuperordinateDomain(domain.createVKey())
+            .setLastTransferTime(clock.nowUtc().minusDays(12))
+            .setLastSuperordinateChange(clock.nowUtc().minusDays(4))
+            .setInetAddresses(
+                ImmutableSet.of(InetAddresses.forString("1080:0:0:0:8:800:200C:417A")))
+            .build());
+    setEppHostUpdateInput(
+        "ns1.example.tld",
+        "ns2.example.tld",
+        "<host:addr ip=\"v6\">1080:0:0:0:8:800:200C:417A</host:addr>",
+        null);
+    assertAboutEppExceptions()
+        .that(assertThrows(AddExistingValueException.class, this::runFlow))
+        .marshalsToXml();
+  }
+
+  @Test
+  void testFailure_removeNonexistentInetAddress() throws Exception {
+    createTld("tld");
+    Domain domain = persistActiveDomain("example.tld");
+    persistResource(
+        newHost(oldHostName())
+            .asBuilder()
+            .setSuperordinateDomain(domain.createVKey())
+            .setLastTransferTime(clock.nowUtc().minusDays(12))
+            .setLastSuperordinateChange(clock.nowUtc().minusDays(4))
+            .build());
+    setEppHostUpdateInput(
+        "ns1.example.tld",
+        "ns2.example.tld",
+        null,
+        "<host:addr ip=\"v6\">1080:0:0:0:8:800:200C:417A</host:addr>");
+    assertAboutEppExceptions()
+        .that(assertThrows(RemoveNonexistentValueException.class, this::runFlow))
+        .marshalsToXml();
+  }
+
   @Test
   void testSuccess_clientUpdateProhibited_removed() throws Exception {
     setEppInput("host_update_remove_client_update_prohibited.xml");
@@ -1077,7 +1143,12 @@ class HostUpdateFlowTest extends ResourceFlowTestCase<HostUpdateFlow, Host> {
     setEppInput("host_update_prohibited_status.xml");
     createTld("tld");
     persistActiveDomain("example.tld");
-    persistActiveHost("ns1.example.tld");
+    persistResource(
+        persistActiveHost("ns1.example.tld")
+            .asBuilder()
+            .setInetAddresses(
+                ImmutableSet.of(InetAddresses.forString("1080:0:0:0:8:800:200C:417A")))
+            .build());
 
     clock.advanceOneMilli();
     runFlowAssertResponse(
@@ -1306,6 +1377,28 @@ class HostUpdateFlowTest extends ResourceFlowTestCase<HostUpdateFlow, Host> {
     doFailingHostNameTest("foo.co.uk", HostNameTooShallowException.class);
   }
 
+  @Test
+  void testFailure_localhostInetAddress_ipv4() throws Exception {
+    createTld("tld");
+    persistActiveSubordinateHost(oldHostName(), persistActiveDomain("example.tld"));
+    setEppHostUpdateInput(
+        "ns1.example.tld", "ns2.example.tld", "<host:addr ip=\"v4\">127.0.0.1</host:addr>", null);
+    assertAboutEppExceptions()
+        .that(assertThrows(LoopbackIpNotValidForHostException.class, this::runFlow))
+        .marshalsToXml();
+  }
+
+  @Test
+  void testFailure_localhostInetAddress_ipv6() throws Exception {
+    createTld("tld");
+    persistActiveSubordinateHost(oldHostName(), persistActiveDomain("example.tld"));
+    setEppHostUpdateInput(
+        "ns1.example.tld", "ns2.example.tld", "<host:addr ip=\"v6\">::1</host:addr>", null);
+    assertAboutEppExceptions()
+        .that(assertThrows(LoopbackIpNotValidForHostException.class, this::runFlow))
+        .marshalsToXml();
+  }
+
   @Test
   void testSuccess_metadata() throws Exception {
     createTld("tld");

core/src/test/java/google/registry/model/eppcommon/EppXmlTransformerTest.java

@@ -21,6 +21,7 @@ import static org.junit.jupiter.api.Assertions.assertThrows;
 
 import google.registry.model.eppinput.EppInput;
 import google.registry.model.eppoutput.EppOutput;
+import google.registry.util.RegistryEnvironment;
 import org.junit.jupiter.api.Test;
 
 /** Tests for {@link EppXmlTransformer}. */
@@ -38,4 +39,26 @@ class EppXmlTransformerTest {
         ClassCastException.class,
         () -> unmarshal(EppOutput.class, loadBytes(getClass(), "contact_info.xml").read()));
   }
+
+  @Test
+  void testSchemas_inNonProduction_includesFee1Point0() {
+    var currentEnv = RegistryEnvironment.get();
+    try {
+      RegistryEnvironment.SANDBOX.setup();
+      assertThat(EppXmlTransformer.getSchemas()).contains("fee-std-v1.xsd");
+    } finally {
+      currentEnv.setup();
+    }
+  }
+
+  @Test
+  void testSchemas_inProduction_skipsFee1Point0() {
+    var currentEnv = RegistryEnvironment.get();
+    try {
+      RegistryEnvironment.PRODUCTION.setup();
+      assertThat(EppXmlTransformer.getSchemas()).doesNotContain("fee-std-v1.xsd");
+    } finally {
+      currentEnv.setup();
+    }
+  }
 }

core/src/test/java/google/registry/model/eppinput/EppInputTest.java

@@ -68,10 +68,7 @@ class EppInputTest {
     assertThat(loginCommand.options.version).isEqualTo("1.0");
     assertThat(loginCommand.options.language).isEqualTo("en");
     assertThat(loginCommand.services.objectServices)
-        .containsExactly(
-            "urn:ietf:params:xml:ns:host-1.0",
-            "urn:ietf:params:xml:ns:domain-1.0",
-            "urn:ietf:params:xml:ns:contact-1.0");
+        .containsExactly("urn:ietf:params:xml:ns:host-1.0", "urn:ietf:params:xml:ns:domain-1.0");
     assertThat(loginCommand.services.serviceExtensions)
         .containsExactly("urn:ietf:params:xml:ns:launch-1.0", "urn:ietf:params:xml:ns:rgp-1.0");
   }

core/src/test/java/google/registry/module/TestRequestComponent.java

@@ -28,6 +28,7 @@ import google.registry.flows.TlsCredentials.EppTlsModule;
 import google.registry.flows.custom.CustomLogicModule;
 import google.registry.loadtest.LoadTestModule;
 import google.registry.monitoring.whitebox.WhiteboxModule;
+import google.registry.mosapi.module.MosApiRequestModule;
 import google.registry.rdap.RdapModule;
 import google.registry.rde.RdeModule;
 import google.registry.reporting.ReportingModule;
@@ -60,6 +61,7 @@ import google.registry.ui.server.console.ConsoleModule;
       EppToolModule.class,
       IcannReportingModule.class,
       LoadTestModule.class,
+      MosApiRequestModule.class,
       RdapModule.class,
       RdeModule.class,
       ReportingModule.class,

core/src/test/java/google/registry/mosapi/GetServiceStateActionTest.java

@@ -0,0 +1,98 @@
+// Copyright 2025 The Nomulus Authors. All Rights Reserved.
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+package google.registry.mosapi;
+
+import static com.google.common.truth.Truth.assertThat;
+import static org.junit.jupiter.api.Assertions.assertThrows;
+import static org.mockito.Mockito.doThrow;
+import static org.mockito.Mockito.verify;
+import static org.mockito.Mockito.when;
+
+import com.google.common.collect.ImmutableList;
+import com.google.common.net.MediaType;
+import com.google.gson.Gson;
+import google.registry.mosapi.MosApiModels.AllServicesStateResponse;
+import google.registry.mosapi.MosApiModels.ServiceStateSummary;
+import google.registry.request.HttpException.ServiceUnavailableException;
+import google.registry.testing.FakeResponse;
+import java.util.Optional;
+import org.junit.jupiter.api.Test;
+import org.junit.jupiter.api.extension.ExtendWith;
+import org.mockito.Mock;
+import org.mockito.junit.jupiter.MockitoExtension;
+
+/** Unit tests for {@link GetServiceStateAction}. */
+@ExtendWith(MockitoExtension.class)
+public class GetServiceStateActionTest {
+
+  @Mock private MosApiStateService stateService;
+  private final FakeResponse response = new FakeResponse();
+  private final Gson gson = new Gson();
+
+  @Test
+  void testRun_singleTld_returnsStateForTld() throws Exception {
+    GetServiceStateAction action =
+        new GetServiceStateAction(stateService, response, gson, Optional.of("example"));
+
+    ServiceStateSummary summary = new ServiceStateSummary("example", "Up", null);
+    when(stateService.getServiceStateSummary("example")).thenReturn(summary);
+
+    action.run();
+
+    assertThat(response.getContentType()).isEqualTo(MediaType.JSON_UTF_8);
+    assertThat(response.getPayload())
+        .contains(
+            """
+            "overallStatus":"Up"
+            """
+                .trim());
+    verify(stateService).getServiceStateSummary("example");
+  }
+
+  @Test
+  void testRun_noTld_returnsStateForAll() {
+    GetServiceStateAction action =
+        new GetServiceStateAction(stateService, response, gson, Optional.empty());
+
+    AllServicesStateResponse allStates = new AllServicesStateResponse(ImmutableList.of());
+    when(stateService.getAllServiceStateSummaries()).thenReturn(allStates);
+
+    action.run();
+
+    assertThat(response.getContentType()).isEqualTo(MediaType.JSON_UTF_8);
+    assertThat(response.getPayload())
+        .contains(
+            """
+            "serviceStates":[]
+            """
+                .trim());
+    verify(stateService).getAllServiceStateSummaries();
+  }
+
+  @Test
+  void testRun_serviceThrowsException_throwsServiceUnavailable() throws Exception {
+    GetServiceStateAction action =
+        new GetServiceStateAction(stateService, response, gson, Optional.of("example"));
+
+    doThrow(new MosApiException("Backend error", null))
+        .when(stateService)
+        .getServiceStateSummary("example");
+
+    ServiceUnavailableException thrown =
+        assertThrows(ServiceUnavailableException.class, action::run);
+
+    assertThat(thrown).hasMessageThat().isEqualTo("Error fetching MoSAPI service state.");
+  }
+}

core/src/test/java/google/registry/mosapi/MosApiErrorResponseTest.java

@@ -11,7 +11,7 @@
 // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 // See the License for the specific language governing permissions and
 // limitations under the License.
-package google.registry.mosapi.model;
+package google.registry.mosapi;
 
 import static com.google.common.truth.Truth.assertThat;
 

core/src/test/java/google/registry/mosapi/MosApiExceptionTest.java

@@ -20,7 +20,6 @@ import google.registry.mosapi.MosApiException.DateOrderInvalidException;
 import google.registry.mosapi.MosApiException.EndDateSyntaxInvalidException;
 import google.registry.mosapi.MosApiException.MosApiAuthorizationException;
 import google.registry.mosapi.MosApiException.StartDateSyntaxInvalidException;
-import google.registry.mosapi.model.MosApiErrorResponse;
 import org.junit.jupiter.api.Test;
 
 /** Unit tests for {@link MosApiException}. */

core/src/test/java/google/registry/mosapi/MosApiModelsTest.java

@@ -0,0 +1,172 @@
+// Copyright 2025 The Nomulus Authors. All Rights Reserved.
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+package google.registry.mosapi;
+
+import static com.google.common.truth.Truth.assertThat;
+
+import com.google.common.collect.ImmutableList;
+import com.google.common.collect.ImmutableMap;
+import com.google.gson.Gson;
+import com.google.gson.GsonBuilder;
+import google.registry.mosapi.MosApiModels.AllServicesStateResponse;
+import google.registry.mosapi.MosApiModels.IncidentSummary;
+import google.registry.mosapi.MosApiModels.ServiceStateSummary;
+import google.registry.mosapi.MosApiModels.ServiceStatus;
+import google.registry.mosapi.MosApiModels.TldServiceState;
+import org.junit.Test;
+
+/** Tests for {@link MosApiModels}. */
+public final class MosApiModelsTest {
+
+  private static final Gson gson =
+      new GsonBuilder().excludeFieldsWithoutExposeAnnotation().create();
+
+  @Test
+  public void testAllServicesStateResponse_nullCollection_initializedToEmpty() {
+    AllServicesStateResponse response = new AllServicesStateResponse(null);
+    assertThat(response.serviceStates()).isEmpty();
+    assertThat(response.serviceStates()).isNotNull();
+  }
+
+  @Test
+  public void testServiceStateSummary_nullCollection_initializedToEmpty() {
+    ServiceStateSummary summary = new ServiceStateSummary("example", "Up", null);
+    assertThat(summary.activeIncidents()).isEmpty();
+    assertThat(summary.activeIncidents()).isNotNull();
+  }
+
+  @Test
+  public void testServiceStatus_nullCollection_initializedToEmpty() {
+    ServiceStatus status = new ServiceStatus("Up", 0.0, null);
+    assertThat(status.incidents()).isEmpty();
+    assertThat(status.incidents()).isNotNull();
+  }
+
+  @Test
+  public void testTldServiceState_nullCollection_initializedToEmpty() {
+    TldServiceState state = new TldServiceState("example", 123456L, "Up", null);
+    assertThat(state.serviceStatuses()).isEmpty();
+    assertThat(state.serviceStatuses()).isNotNull();
+  }
+
+  @Test
+  public void testIncidentSummary_jsonSerialization() {
+    IncidentSummary incident = new IncidentSummary("inc-123", 1000L, false, "Active", 2000L);
+    String json = gson.toJson(incident);
+    // Using Text Blocks to avoid escaping quotes
+    assertThat(json)
+        .contains(
+            """
+            "incidentID":"inc-123"
+            """
+                .trim());
+    assertThat(json)
+        .contains(
+            """
+            "startTime":1000
+            """
+                .trim());
+    assertThat(json)
+        .contains(
+            """
+            "falsePositive":false
+            """
+                .trim());
+    assertThat(json)
+        .contains(
+            """
+            "state":"Active"
+            """
+                .trim());
+    assertThat(json)
+        .contains(
+            """
+            "endTime":2000
+            """
+                .trim());
+  }
+
+  @Test
+  public void testServiceStatus_jsonSerialization() {
+    IncidentSummary incident = new IncidentSummary("inc-1", 1000L, false, "Resolved", null);
+    ServiceStatus status = new ServiceStatus("Down", 75.5, ImmutableList.of(incident));
+    String json = gson.toJson(status);
+    assertThat(json)
+        .contains(
+            """
+            "status":"Down"
+            """
+                .trim());
+    assertThat(json)
+        .contains(
+            """
+            "emergencyThreshold":75.5
+            """
+                .trim());
+    assertThat(json)
+        .contains(
+            """
+            "incidents":[
+            """
+                .trim());
+  }
+
+  @Test
+  public void testTldServiceState_jsonSerialization() {
+    ServiceStatus dnsStatus = new ServiceStatus("Up", 0.0, ImmutableList.of());
+    TldServiceState state =
+        new TldServiceState("app", 1700000000L, "Up", ImmutableMap.of("DNS", dnsStatus));
+
+    String json = gson.toJson(state);
+    assertThat(json)
+        .contains(
+            """
+            "tld":"app"
+            """
+                .trim());
+    assertThat(json)
+        .contains(
+            """
+            "status":"Up"
+            """
+                .trim());
+    assertThat(json)
+        .contains(
+            """
+            "testedServices":{"DNS":{
+            """
+                .trim());
+  }
+
+  @Test
+  public void testAllServicesStateResponse_jsonSerialization() {
+    ServiceStateSummary summary = new ServiceStateSummary("dev", "Up", ImmutableList.of());
+    AllServicesStateResponse response = new AllServicesStateResponse(ImmutableList.of(summary));
+
+    String json = gson.toJson(response);
+    assertThat(json)
+        .contains(
+            """
+            "serviceStates":[
+            """
+                .trim());
+    assertThat(json)
+        .contains(
+            """
+            "tld":"dev"
+            """
+                .trim());
+  }
+}

core/src/test/java/google/registry/mosapi/MosApiStateServiceTest.java

@@ -0,0 +1,172 @@
+// Copyright 2025 The Nomulus Authors. All Rights Reserved.
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+package google.registry.mosapi;
+
+import static com.google.common.truth.Truth.assertThat;
+import static org.junit.jupiter.api.Assertions.assertThrows;
+import static org.mockito.ArgumentMatchers.argThat;
+import static org.mockito.Mockito.verify;
+import static org.mockito.Mockito.when;
+
+import com.google.common.collect.ImmutableList;
+import com.google.common.collect.ImmutableMap;
+import com.google.common.collect.ImmutableSet;
+import com.google.common.util.concurrent.MoreExecutors;
+import google.registry.mosapi.MosApiModels.AllServicesStateResponse;
+import google.registry.mosapi.MosApiModels.IncidentSummary;
+import google.registry.mosapi.MosApiModels.ServiceStateSummary;
+import google.registry.mosapi.MosApiModels.ServiceStatus;
+import google.registry.mosapi.MosApiModels.TldServiceState;
+import java.util.concurrent.ExecutorService;
+import org.junit.jupiter.api.BeforeEach;
+import org.junit.jupiter.api.Test;
+import org.junit.jupiter.api.extension.ExtendWith;
+import org.mockito.Mock;
+import org.mockito.junit.jupiter.MockitoExtension;
+
+/** Unit tests for {@link MosApiStateService}. */
+@ExtendWith(MockitoExtension.class)
+class MosApiStateServiceTest {
+
+  @Mock private ServiceMonitoringClient client;
+  @Mock private MosApiMetrics metrics;
+
+  private final ExecutorService executor = MoreExecutors.newDirectExecutorService();
+
+  private MosApiStateService service;
+
+  @BeforeEach
+  void setUp() {
+    service = new MosApiStateService(client, metrics, ImmutableSet.of("tld1", "tld2"), executor);
+  }
+
+  @Test
+  void testGetServiceStateSummary_upStatus_returnsEmptyIncidents() throws Exception {
+    TldServiceState rawState = new TldServiceState("tld1", 12345L, "Up", ImmutableMap.of());
+    when(client.getTldServiceState("tld1")).thenReturn(rawState);
+
+    ServiceStateSummary result = service.getServiceStateSummary("tld1");
+
+    assertThat(result.tld()).isEqualTo("tld1");
+    assertThat(result.overallStatus()).isEqualTo("Up");
+    assertThat(result.activeIncidents()).isEmpty();
+  }
+
+  @Test
+  void testGetServiceStateSummary_downStatus_filtersActiveIncidents() throws Exception {
+    IncidentSummary dnsIncident = new IncidentSummary("inc-1", 100L, false, "Open", null);
+    ServiceStatus dnsService = new ServiceStatus("Down", 50.0, ImmutableList.of(dnsIncident));
+
+    ServiceStatus rdapService = new ServiceStatus("Up", 0.0, ImmutableList.of());
+
+    TldServiceState rawState =
+        new TldServiceState(
+            "tld1", 12345L, "Down", ImmutableMap.of("DNS", dnsService, "RDAP", rdapService));
+
+    when(client.getTldServiceState("tld1")).thenReturn(rawState);
+
+    ServiceStateSummary result = service.getServiceStateSummary("tld1");
+
+    assertThat(result.overallStatus()).isEqualTo("Down");
+    assertThat(result.activeIncidents()).hasSize(1);
+
+    ServiceStatus incidentSummary = result.activeIncidents().get(0);
+    assertThat(incidentSummary.status()).isEqualTo("DNS");
+    assertThat(incidentSummary.incidents()).containsExactly(dnsIncident);
+  }
+
+  @Test
+  void testGetServiceStateSummary_throwsException_whenClientFails() throws Exception {
+    when(client.getTldServiceState("tld1")).thenThrow(new MosApiException("Network error", null));
+
+    assertThrows(MosApiException.class, () -> service.getServiceStateSummary("tld1"));
+  }
+
+  @Test
+  void testGetAllServiceStateSummaries_success() throws Exception {
+    TldServiceState state1 = new TldServiceState("tld1", 1L, "Up", ImmutableMap.of());
+    TldServiceState state2 = new TldServiceState("tld2", 2L, "Up", ImmutableMap.of());
+
+    when(client.getTldServiceState("tld1")).thenReturn(state1);
+    when(client.getTldServiceState("tld2")).thenReturn(state2);
+
+    AllServicesStateResponse response = service.getAllServiceStateSummaries();
+
+    assertThat(response.serviceStates()).hasSize(2);
+    assertThat(response.serviceStates().stream().map(ServiceStateSummary::tld))
+        .containsExactly("tld1", "tld2");
+  }
+
+  @Test
+  void testGetAllServiceStateSummaries_partialFailure_returnsErrorState() throws Exception {
+    TldServiceState state1 = new TldServiceState("tld1", 1L, "Up", ImmutableMap.of());
+    when(client.getTldServiceState("tld1")).thenReturn(state1);
+
+    when(client.getTldServiceState("tld2")).thenThrow(new MosApiException("Failure", null));
+
+    AllServicesStateResponse response = service.getAllServiceStateSummaries();
+
+    assertThat(response.serviceStates()).hasSize(2);
+
+    ServiceStateSummary summary1 =
+        response.serviceStates().stream().filter(s -> s.tld().equals("tld1")).findFirst().get();
+    assertThat(summary1.overallStatus()).isEqualTo("Up");
+
+    ServiceStateSummary summary2 =
+        response.serviceStates().stream().filter(s -> s.tld().equals("tld2")).findFirst().get();
+
+    assertThat(summary2.overallStatus()).isEqualTo("ERROR");
+    assertThat(summary2.activeIncidents()).isEmpty();
+  }
+
+  @Test
+  void testTriggerMetricsForAllServiceStateSummaries_success() throws Exception {
+    TldServiceState state1 = new TldServiceState("tld1", 1L, "Up", ImmutableMap.of());
+    TldServiceState state2 = new TldServiceState("tld2", 2L, "Up", ImmutableMap.of());
+
+    when(client.getTldServiceState("tld1")).thenReturn(state1);
+    when(client.getTldServiceState("tld2")).thenReturn(state2);
+
+    service.triggerMetricsForAllServiceStateSummaries();
+
+    verify(metrics)
+        .recordStates(
+            argThat(
+                states ->
+                    states.size() == 2
+                        && states.stream()
+                            .anyMatch(s -> s.tld().equals("tld1") && s.status().equals("Up"))
+                        && states.stream()
+                            .anyMatch(s -> s.tld().equals("tld2") && s.status().equals("Up"))));
+  }
+
+  @Test
+  void testTriggerMetricsForAllServiceStateSummaries_partialFailure_recordsErrorMetric()
+      throws Exception {
+    TldServiceState state1 = new TldServiceState("tld1", 1L, "Up", ImmutableMap.of());
+    when(client.getTldServiceState("tld1")).thenReturn(state1);
+    when(client.getTldServiceState("tld2")).thenThrow(new MosApiException("Network Error", null));
+
+    service.triggerMetricsForAllServiceStateSummaries();
+
+    verify(metrics)
+        .recordStates(
+            argThat(
+                states ->
+                    states.size() == 1
+                        && states.stream()
+                            .anyMatch(s -> s.tld().equals("tld1") && s.status().equals("Up"))));
+  }
+}

core/src/test/java/google/registry/mosapi/ServiceMonitoringClientTest.java

@@ -0,0 +1,140 @@
+// Copyright 2025 The Nomulus Authors. All Rights Reserved.
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//      http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+package google.registry.mosapi;
+
+import static com.google.common.truth.Truth.assertThat;
+import static org.junit.jupiter.api.Assertions.assertThrows;
+import static org.mockito.ArgumentMatchers.anyMap;
+import static org.mockito.ArgumentMatchers.eq;
+import static org.mockito.Mockito.mock;
+import static org.mockito.Mockito.when;
+
+import com.google.gson.Gson;
+import google.registry.mosapi.MosApiModels.TldServiceState;
+import google.registry.tools.GsonUtils;
+import okhttp3.MediaType;
+import okhttp3.Protocol;
+import okhttp3.Request;
+import okhttp3.Response;
+import okhttp3.ResponseBody;
+import org.junit.jupiter.api.BeforeEach;
+import org.junit.jupiter.api.Test;
+
+public class ServiceMonitoringClientTest {
+
+  private static final String TLD = "example";
+  private static final String ENDPOINT = "v2/monitoring/state";
+  private final MosApiClient mosApiClient = mock(MosApiClient.class);
+  private final Gson gson = GsonUtils.provideGson();
+  private ServiceMonitoringClient client;
+
+  @BeforeEach
+  void beforeEach() {
+    client = new ServiceMonitoringClient(mosApiClient, gson);
+  }
+
+  @Test
+  void testGetTldServiceState_success() throws Exception {
+    String jsonResponse =
+        """
+        {
+          "tld": "example",
+          "services": [
+            {
+              "service": "DNS",
+              "status": "OPERATIONAL"
+            }
+          ]
+        }
+        """;
+
+    try (Response response = createMockResponse(200, jsonResponse)) {
+      when(mosApiClient.sendGetRequest(eq(TLD), eq(ENDPOINT), anyMap(), anyMap()))
+          .thenReturn(response);
+
+      TldServiceState result = client.getTldServiceState(TLD);
+      assertThat(gson.toJson(result)).contains("example");
+    }
+  }
+
+  @Test
+  void testGetTldServiceState_apiError_throwsMosApiException() throws Exception {
+    String errorJson =
+        """
+        {
+          "resultCode": "2011",
+          "message": "Invalid duration"
+        }
+        """;
+
+    try (Response response = createMockResponse(400, errorJson)) {
+      when(mosApiClient.sendGetRequest(eq(TLD), eq(ENDPOINT), anyMap(), anyMap()))
+          .thenReturn(response);
+
+      MosApiException thrown =
+          assertThrows(MosApiException.class, () -> client.getTldServiceState(TLD));
+      assertThat(thrown.getMessage()).contains("2011");
+      assertThat(thrown.getMessage()).contains("Invalid duration");
+    }
+  }
+
+  @Test
+  void testGetTldServiceState_nonJsonError_throwsMosApiException() throws Exception {
+    String htmlError =
+        """
+        <html>
+          <body>502 Bad Gateway</body>
+        </html>
+        """;
+
+    try (Response response = createMockResponse(502, htmlError)) {
+      when(mosApiClient.sendGetRequest(eq(TLD), eq(ENDPOINT), anyMap(), anyMap()))
+          .thenReturn(response);
+
+      MosApiException thrown =
+          assertThrows(MosApiException.class, () -> client.getTldServiceState(TLD));
+      assertThat(thrown.getMessage()).contains("MoSAPI json parsing error (502)");
+      assertThat(thrown.getMessage()).contains("502 Bad Gateway");
+    }
+  }
+
+  @Test
+  void testGetTldServiceState_emptyBody_throwsMosApiException() throws Exception {
+    Response response =
+        new Response.Builder()
+            .request(new Request.Builder().url("http://localhost").build())
+            .protocol(Protocol.HTTP_1_1)
+            .code(204)
+            .message("No Content")
+            .build();
+
+    when(mosApiClient.sendGetRequest(eq(TLD), eq(ENDPOINT), anyMap(), anyMap()))
+        .thenReturn(response);
+
+    MosApiException thrown =
+        assertThrows(MosApiException.class, () -> client.getTldServiceState(TLD));
+    assertThat(thrown.getMessage()).contains("returned an empty body");
+  }
+
+  private Response createMockResponse(int code, String body) {
+    return new Response.Builder()
+        .request(new Request.Builder().url("http://localhost").build())
+        .protocol(Protocol.HTTP_1_1)
+        .code(code)
+        .message(code == 200 ? "OK" : "Error")
+        .body(ResponseBody.create(body, MediaType.parse("application/json")))
+        .build();
+  }
+}

core/src/test/java/google/registry/mosapi/TriggerServiceStateActionTest.java

@@ -0,0 +1,69 @@
+// Copyright 2026 The Nomulus Authors. All Rights Reserved.
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+package google.registry.mosapi;
+
+import static com.google.common.truth.Truth.assertThat;
+import static org.junit.jupiter.api.Assertions.assertThrows;
+import static org.mockito.Mockito.doThrow;
+import static org.mockito.Mockito.mock;
+import static org.mockito.Mockito.verify;
+
+import com.google.common.net.MediaType;
+import google.registry.request.HttpException.InternalServerErrorException;
+import google.registry.testing.FakeResponse;
+import org.junit.jupiter.api.BeforeEach;
+import org.junit.jupiter.api.Test;
+import org.junit.jupiter.api.extension.ExtendWith;
+import org.mockito.junit.jupiter.MockitoExtension;
+
+/** Unit tests for {@link TriggerServiceStateActionTest}. */
+@ExtendWith(MockitoExtension.class)
+public class TriggerServiceStateActionTest {
+
+  private final MosApiStateService stateService = mock(MosApiStateService.class);
+  private final FakeResponse response = new FakeResponse();
+  private TriggerServiceStateAction action;
+
+  @BeforeEach
+  void beforeEach() {
+    action = new TriggerServiceStateAction(stateService, response);
+  }
+
+  @Test
+  void testRun_success() {
+    action.run();
+
+    verify(stateService).triggerMetricsForAllServiceStateSummaries();
+
+    assertThat(response.getContentType()).isEqualTo(MediaType.PLAIN_TEXT_UTF_8);
+    assertThat(response.getStatus()).isEqualTo(200);
+    assertThat(response.getPayload())
+        .isEqualTo("MoSAPI metrics triggered successfully for all TLDs.");
+  }
+
+  @Test
+  void testRun_failure_throwsInternalServerError() {
+    doThrow(new RuntimeException("Database error"))
+        .when(stateService)
+        .triggerMetricsForAllServiceStateSummaries();
+
+    InternalServerErrorException thrown =
+        assertThrows(InternalServerErrorException.class, () -> action.run());
+
+    assertThat(thrown.getMessage()).contains("Failed to process MoSAPI metrics.");
+
+    assertThat(response.getContentType()).isEqualTo(MediaType.PLAIN_TEXT_UTF_8);
+  }
+}

core/src/test/java/google/registry/mosapi/module/MosApiRequestModuleTest.java

@@ -0,0 +1,57 @@
+// Copyright 2025 The Nomulus Authors. All Rights Reserved.
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+package google.registry.mosapi.module;
+
+import static com.google.common.truth.Truth.assertThat;
+import static org.mockito.Mockito.mock;
+import static org.mockito.Mockito.when;
+
+import jakarta.servlet.http.HttpServletRequest;
+import java.util.Optional;
+import org.junit.jupiter.api.Test;
+
+/** Unit tests for {@link MosApiRequestModule}. */
+public class MosApiRequestModuleTest {
+
+  @Test
+  void testProvideTld_paramPresent() {
+    HttpServletRequest req = mock(HttpServletRequest.class);
+    when(req.getParameter("tld")).thenReturn("example.tld");
+
+    Optional<String> result = MosApiRequestModule.provideTld(req);
+
+    assertThat(result).hasValue("example.tld");
+  }
+
+  @Test
+  void testProvideTld_paramMissing() {
+    HttpServletRequest req = mock(HttpServletRequest.class);
+    when(req.getParameter("tld")).thenReturn(null);
+
+    Optional<String> result = MosApiRequestModule.provideTld(req);
+
+    assertThat(result).isEmpty();
+  }
+
+  @Test
+  void testProvideTld_paramEmptyString() {
+    HttpServletRequest req = mock(HttpServletRequest.class);
+    when(req.getParameter("tld")).thenReturn("");
+
+    Optional<String> result = MosApiRequestModule.provideTld(req);
+
+    assertThat(result).isEmpty();
+  }
+}

core/src/test/resources/google/registry/flows/domain/domain_check_eap_fee_response_stdv1.xml

@@ -0,0 +1,54 @@
+<epp xmlns="urn:ietf:params:xml:ns:epp-1.0">
+  <response>
+    <result code="1000">
+      <msg>Command completed successfully</msg>
+    </result>
+    <resData>
+      <domain:chkData xmlns:domain="urn:ietf:params:xml:ns:domain-1.0">
+        <domain:cd>
+          <domain:name avail="0">example1.tld</domain:name>
+          <domain:reason>In use</domain:reason>
+        </domain:cd>
+        <domain:cd>
+          <domain:name avail="1">example2.tld</domain:name>
+        </domain:cd>
+        <domain:cd>
+          <domain:name avail="1">example3.tld</domain:name>
+        </domain:cd>
+      </domain:chkData>
+    </resData>
+    <extension>
+      <fee:chkData xmlns:fee="urn:ietf:params:xml:ns:epp:fee-1.0">
+        <fee:currency>USD</fee:currency>
+        <fee:cd>
+          <fee:objID>example1.tld</fee:objID>
+          <fee:command name="create">
+            <fee:period unit="y">1</fee:period>
+            <fee:fee description="create">13.00</fee:fee>
+            <fee:fee description="Early Access Period, fee expires: 2010-01-02T10:00:00.002Z">100.00</fee:fee>
+          </fee:command>
+        </fee:cd>
+        <fee:cd>
+          <fee:objID>example2.tld</fee:objID>
+          <fee:command name="create">
+            <fee:period unit="y">1</fee:period>
+            <fee:fee description="create">13.00</fee:fee>
+            <fee:fee description="Early Access Period, fee expires: 2010-01-02T10:00:00.002Z">100.00</fee:fee>
+          </fee:command>
+        </fee:cd>
+        <fee:cd>
+          <fee:objID>example3.tld</fee:objID>
+          <fee:command name="create">
+            <fee:period unit="y">1</fee:period>
+            <fee:fee description="create">13.00</fee:fee>
+            <fee:fee description="Early Access Period, fee expires: 2010-01-02T10:00:00.002Z">100.00</fee:fee>
+          </fee:command>
+        </fee:cd>
+      </fee:chkData>
+    </extension>
+    <trID>
+      <clTRID>ABC-12345</clTRID>
+      <svTRID>server-trid</svTRID>
+    </trID>
+  </response>
+</epp>

core/src/test/resources/google/registry/flows/domain/domain_check_fee_invalid_command_stdv1.xml

@@ -0,0 +1,17 @@
+<epp xmlns="urn:ietf:params:xml:ns:epp-1.0">
+  <command>
+    <check>
+      <domain:check xmlns:domain="urn:ietf:params:xml:ns:domain-1.0">
+        <domain:name>example1.tld</domain:name>
+      </domain:check>
+    </check>
+    <extension>
+      <fee:check xmlns:fee="urn:ietf:params:xml:ns:fee-0.12">
+        <fee:command name="Create">
+          <fee:period unit="y">1</fee:period>
+        </fee:command>
+      </fee:check>
+    </extension>
+    <clTRID>ABC-12345</clTRID>
+  </command>
+</epp>

core/src/test/resources/google/registry/flows/domain/domain_check_fee_multiple_commands_allocationtoken_response_stdv1.xml

@@ -0,0 +1,58 @@
+<epp xmlns="urn:ietf:params:xml:ns:epp-1.0">
+  <response>
+    <result code="1000">
+      <msg>Command completed successfully</msg>
+    </result>
+    <resData>
+      <domain:chkData xmlns:domain="urn:ietf:params:xml:ns:domain-1.0">
+        <domain:cd>
+          <domain:name avail="1">example1.tld</domain:name>
+        </domain:cd>
+      </domain:chkData>
+    </resData>
+    <extension>
+      <fee:chkData xmlns:fee="urn:ietf:params:xml:ns:epp:fee-1.0">
+        <fee:currency>USD</fee:currency>
+        <fee:cd>
+          <fee:objID>example1.tld</fee:objID>
+          <fee:command name="create">
+            <fee:period unit="y">1</fee:period>
+            <fee:fee description="create">11.70</fee:fee>
+          </fee:command>
+        </fee:cd>
+        <fee:cd>
+          <fee:objID>example1.tld</fee:objID>
+          <fee:command name="renew">
+            <fee:period unit="y">1</fee:period>
+            <fee:fee description="renew">11.00</fee:fee>
+          </fee:command>
+        </fee:cd>
+        <fee:cd>
+          <fee:objID>example1.tld</fee:objID>
+          <fee:command name="transfer">
+            <fee:period unit="y">1</fee:period>
+            <fee:fee description="renew">11.00</fee:fee>
+          </fee:command>
+        </fee:cd>
+        <fee:cd>
+          <fee:objID>example1.tld</fee:objID>
+          <fee:command name="restore">
+            <fee:period unit="y">1</fee:period>
+            <fee:fee description="restore">17.00</fee:fee>
+          </fee:command>
+        </fee:cd>
+        <fee:cd>
+          <fee:objID>example1.tld</fee:objID>
+          <fee:command name="update">
+            <fee:period unit="y">1</fee:period>
+            <fee:fee description="update">0.00</fee:fee>
+          </fee:command>
+        </fee:cd>
+      </fee:chkData>
+    </extension>
+    <trID>
+      <clTRID>ABC-12345</clTRID>
+      <svTRID>server-trid</svTRID>
+    </trID>
+  </response>
+</epp>

core/src/test/resources/google/registry/flows/domain/domain_check_fee_multiple_commands_allocationtoken_stdv1.xml

@@ -0,0 +1,24 @@
+<epp xmlns="urn:ietf:params:xml:ns:epp-1.0">
+  <command>
+    <check>
+      <domain:check xmlns:domain="urn:ietf:params:xml:ns:domain-1.0">
+        <domain:name>example1.tld</domain:name>
+      </domain:check>
+    </check>
+    <extension>
+      <allocationToken:allocationToken
+          xmlns:allocationToken=
+              "urn:ietf:params:xml:ns:allocationToken-1.0">
+        abc123
+      </allocationToken:allocationToken>
+      <fee:check xmlns:fee="urn:ietf:params:xml:ns:epp:fee-1.0">
+        <fee:command name="create" />
+        <fee:command name="renew" />
+        <fee:command name="transfer" />
+        <fee:command name="restore" />
+        <fee:command name="update" />
+      </fee:check>
+    </extension>
+    <clTRID>ABC-12345</clTRID>
+  </command>
+</epp>

core/src/test/resources/google/registry/flows/domain/domain_check_fee_multiple_commands_default_token_response_stdv1.xml

@@ -0,0 +1,58 @@
+<epp xmlns="urn:ietf:params:xml:ns:epp-1.0">
+  <response>
+    <result code="1000">
+      <msg>Command completed successfully</msg>
+    </result>
+    <resData>
+      <domain:chkData xmlns:domain="urn:ietf:params:xml:ns:domain-1.0">
+        <domain:cd>
+          <domain:name avail="1">example1.tld</domain:name>
+        </domain:cd>
+      </domain:chkData>
+    </resData>
+    <extension>
+      <fee:chkData xmlns:fee="urn:ietf:params:xml:ns:epp:fee-1.0">
+        <fee:currency>USD</fee:currency>
+        <fee:cd>
+          <fee:objID>example1.tld</fee:objID>
+          <fee:command name="create">
+            <fee:period unit="y">1</fee:period>
+            <fee:fee description="create">6.50</fee:fee>
+          </fee:command>
+        </fee:cd>
+        <fee:cd>
+          <fee:objID>example1.tld</fee:objID>
+          <fee:command name="renew">
+            <fee:period unit="y">1</fee:period>
+            <fee:fee description="renew">11.00</fee:fee>
+          </fee:command>
+        </fee:cd>
+        <fee:cd>
+          <fee:objID>example1.tld</fee:objID>
+          <fee:command name="transfer">
+            <fee:period unit="y">1</fee:period>
+            <fee:fee description="renew">11.00</fee:fee>
+          </fee:command>
+        </fee:cd>
+        <fee:cd>
+          <fee:objID>example1.tld</fee:objID>
+          <fee:command name="restore">
+            <fee:period unit="y">1</fee:period>
+            <fee:fee description="restore">17.00</fee:fee>
+          </fee:command>
+        </fee:cd>
+        <fee:cd>
+          <fee:objID>example1.tld</fee:objID>
+          <fee:command name="update">
+            <fee:period unit="y">1</fee:period>
+            <fee:fee description="update">0.00</fee:fee>
+          </fee:command>
+        </fee:cd>
+      </fee:chkData>
+    </extension>
+    <trID>
+      <clTRID>ABC-12345</clTRID>
+      <svTRID>server-trid</svTRID>
+    </trID>
+  </response>
+</epp>

core/src/test/resources/google/registry/flows/domain/domain_check_fee_multiple_commands_response_stdv1.xml

@@ -0,0 +1,58 @@
+<epp xmlns="urn:ietf:params:xml:ns:epp-1.0">
+  <response>
+    <result code="1000">
+      <msg>Command completed successfully</msg>
+    </result>
+    <resData>
+      <domain:chkData xmlns:domain="urn:ietf:params:xml:ns:domain-1.0">
+        <domain:cd>
+          <domain:name avail="1">example1.tld</domain:name>
+        </domain:cd>
+      </domain:chkData>
+    </resData>
+    <extension>
+      <fee:chkData xmlns:fee="urn:ietf:params:xml:ns:epp:fee-1.0">
+        <fee:currency>USD</fee:currency>
+        <fee:cd>
+          <fee:objID>example1.tld</fee:objID>
+          <fee:command name="create">
+            <fee:period unit="y">1</fee:period>
+            <fee:fee description="create">13.00</fee:fee>
+          </fee:command>
+        </fee:cd>
+        <fee:cd>
+          <fee:objID>example1.tld</fee:objID>
+          <fee:command name="renew">
+            <fee:period unit="y">1</fee:period>
+            <fee:fee description="renew">11.00</fee:fee>
+          </fee:command>
+        </fee:cd>
+        <fee:cd>
+          <fee:objID>example1.tld</fee:objID>
+          <fee:command name="transfer">
+            <fee:period unit="y">1</fee:period>
+            <fee:fee description="renew">11.00</fee:fee>
+          </fee:command>
+        </fee:cd>
+        <fee:cd>
+          <fee:objID>example1.tld</fee:objID>
+          <fee:command name="restore">
+            <fee:period unit="y">1</fee:period>
+            <fee:fee description="restore">17.00</fee:fee>
+          </fee:command>
+        </fee:cd>
+        <fee:cd>
+          <fee:objID>example1.tld</fee:objID>
+          <fee:command name="update">
+            <fee:period unit="y">1</fee:period>
+            <fee:fee description="update">0.00</fee:fee>
+          </fee:command>
+        </fee:cd>
+      </fee:chkData>
+    </extension>
+    <trID>
+      <clTRID>ABC-12345</clTRID>
+      <svTRID>server-trid</svTRID>
+    </trID>
+  </response>
+</epp>

core/src/test/resources/google/registry/flows/domain/domain_check_fee_multiple_commands_stdv1.xml

@@ -0,0 +1,19 @@
+<epp xmlns="urn:ietf:params:xml:ns:epp-1.0">
+  <command>
+    <check>
+      <domain:check xmlns:domain="urn:ietf:params:xml:ns:domain-1.0">
+        <domain:name>example1.tld</domain:name>
+      </domain:check>
+    </check>
+    <extension>
+      <fee:check xmlns:fee="urn:ietf:params:xml:ns:epp:fee-1.0">
+        <fee:command name="create" />
+        <fee:command name="renew" />
+        <fee:command name="transfer" />
+        <fee:command name="restore" />
+        <fee:command name="update" />
+      </fee:check>
+    </extension>
+    <clTRID>ABC-12345</clTRID>
+  </command>
+</epp>

core/src/test/resources/google/registry/flows/domain/domain_check_fee_multiple_currencies_response_v12.xml

@@ -0,0 +1,45 @@
+<epp xmlns="urn:ietf:params:xml:ns:epp-1.0">
+<response>
+    <result code="1000">
+      <msg>Command completed successfully</msg>
+    </result>
+    <resData>
+      <domain:chkData xmlns:domain="urn:ietf:params:xml:ns:domain-1.0">
+        <domain:cd>
+          <domain:name avail="true">example.example</domain:name>
+        </domain:cd>
+        <domain:cd>
+          <domain:name avail="true">example.tld</domain:name>
+        </domain:cd>
+      </domain:chkData>
+    </resData>
+    <extension>
+      <fee:chkData xmlns:fee="urn:ietf:params:xml:ns:fee-0.12"
+                   xmlns:domain="urn:ietf:params:xml:ns:domain-1.0">
+        <fee:cd>
+          <fee:object>
+            <domain:name>example.example</domain:name>
+          </fee:object>
+          <fee:command name="create">
+            <fee:period unit="y">1</fee:period>
+            <fee:fee description="create">800</fee:fee>
+            <fee:fee description="Early Access Period, fee expires: 294247-01-10T04:00:54.775Z">800</fee:fee>
+          </fee:command>
+        </fee:cd>
+        <fee:cd>
+          <fee:object>
+            <domain:name>example.tld</domain:name>
+          </fee:object>
+          <fee:command name="create">
+            <fee:period unit="y">1</fee:period>
+            <fee:fee description="create">13.00</fee:fee>
+          </fee:command>
+        </fee:cd>
+      </fee:chkData>
+    </extension>
+    <trID>
+      <clTRID>ABC-12345</clTRID>
+      <svTRID>server-trid</svTRID>
+    </trID>
+  </response>
+</epp>

core/src/test/resources/google/registry/flows/domain/domain_check_fee_multiple_currencies_stdv1.xml

@@ -0,0 +1,18 @@
+<epp xmlns="urn:ietf:params:xml:ns:epp-1.0">
+  <command>
+    <check>
+      <domain:check xmlns:domain="urn:ietf:params:xml:ns:domain-1.0">
+        <domain:name>example.tld</domain:name>
+        <domain:name>example.example</domain:name>
+      </domain:check>
+    </check>
+   <extension>
+     <fee:check xmlns:fee="urn:ietf:params:xml:ns:epp:fee-1.0">
+       <fee:command name="create">
+         <fee:period unit="y">1</fee:period>
+       </fee:command>
+     </fee:check>
+    </extension>
+    <clTRID>ABC-12345</clTRID>
+  </command>
+</epp>

core/src/test/resources/google/registry/flows/domain/domain_check_fee_multiple_currencies_v12.xml

@@ -0,0 +1,16 @@
+<epp xmlns="urn:ietf:params:xml:ns:epp-1.0">
+  <command>
+    <check>
+      <domain:check xmlns:domain="urn:ietf:params:xml:ns:domain-1.0">
+        <domain:name>example.example</domain:name>
+        <domain:name>example.tld</domain:name>
+      </domain:check>
+    </check>
+    <extension>
+      <fee:check xmlns:fee="urn:ietf:params:xml:ns:fee-0.12">
+        <fee:command name="create" />
+      </fee:check>
+    </extension>
+    <clTRID>ABC-12345</clTRID>
+  </command>
+</epp>

core/src/test/resources/google/registry/flows/domain/domain_check_fee_premium_response_stdv1.xml

@@ -0,0 +1,61 @@
+<epp xmlns="urn:ietf:params:xml:ns:epp-1.0">
+  <response>
+    <result code="1000">
+      <msg>Command completed successfully</msg>
+    </result>
+    <resData>
+      <domain:chkData xmlns:domain="urn:ietf:params:xml:ns:domain-1.0">
+        <domain:cd>
+          <domain:name avail="1">rich.example</domain:name>
+        </domain:cd>
+      </domain:chkData>
+    </resData>
+    <extension>
+      <fee:chkData xmlns:fee="urn:ietf:params:xml:ns:epp:fee-1.0">
+        <fee:currency>USD</fee:currency>
+        <fee:cd>
+          <fee:objID>rich.example</fee:objID>
+          <fee:class>premium</fee:class>
+          <fee:command name="create">
+            <fee:period unit="y">1</fee:period>
+            <fee:fee description="create">100.00</fee:fee>
+          </fee:command>
+        </fee:cd>
+        <fee:cd>
+          <fee:objID>rich.example</fee:objID>
+          <fee:class>premium</fee:class>
+          <fee:command name="renew">
+            <fee:period unit="y">1</fee:period>
+            <fee:fee description="renew">100.00</fee:fee>
+          </fee:command>
+        </fee:cd>
+        <fee:cd>
+          <fee:objID>rich.example</fee:objID>
+          <fee:class>premium</fee:class>
+          <fee:command name="transfer">
+            <fee:period unit="y">1</fee:period>
+            <fee:fee description="renew">100.00</fee:fee>
+          </fee:command>
+        </fee:cd>
+        <fee:cd>
+          <fee:objID>rich.example</fee:objID>
+          <fee:command name="restore">
+            <fee:period unit="y">1</fee:period>
+            <fee:fee description="restore">17.00</fee:fee>
+          </fee:command>
+        </fee:cd>
+        <fee:cd>
+          <fee:objID>rich.example</fee:objID>
+          <fee:command name="update">
+            <fee:period unit="y">1</fee:period>
+            <fee:fee description="update">0.00</fee:fee>
+          </fee:command>
+        </fee:cd>
+      </fee:chkData>
+    </extension>
+    <trID>
+      <clTRID>ABC-12345</clTRID>
+      <svTRID>server-trid</svTRID>
+    </trID>
+  </response>
+</epp>

core/src/test/resources/google/registry/flows/domain/domain_check_fee_premium_response_stdv1_renew_only.xml

@@ -0,0 +1,31 @@
+<epp xmlns="urn:ietf:params:xml:ns:epp-1.0">
+  <response>
+    <result code="1000">
+      <msg>Command completed successfully</msg>
+    </result>
+    <resData>
+      <domain:chkData xmlns:domain="urn:ietf:params:xml:ns:domain-1.0">
+        <domain:cd>
+          <domain:name avail="false">rich.example</domain:name>
+          <domain:reason>In use</domain:reason>
+        </domain:cd>
+      </domain:chkData>
+    </resData>
+    <extension>
+      <fee:chkData xmlns:fee="urn:ietf:params:xml:ns:epp:fee-1.0">
+        <fee:currency>USD</fee:currency>
+        <fee:cd>
+          <fee:objID>rich.example</fee:objID>
+          <fee:command name="renew">
+            <fee:period unit="y">1</fee:period>
+            <fee:fee description="renew">%RENEWPRICE%</fee:fee>
+          </fee:command>
+        </fee:cd>
+      </fee:chkData>
+    </extension>
+    <trID>
+      <clTRID>ABC-12345</clTRID>
+      <svTRID>server-trid</svTRID>
+    </trID>
+  </response>
+</epp>

core/src/test/resources/google/registry/flows/domain/domain_check_fee_premium_response_stdv1_with_renewal.xml

@@ -0,0 +1,64 @@
+<epp xmlns="urn:ietf:params:xml:ns:epp-1.0">
+  <response>
+    <result code="1000">
+      <msg>Command completed successfully</msg>
+    </result>
+    <resData>
+      <domain:chkData xmlns:domain="urn:ietf:params:xml:ns:domain-1.0">
+        <domain:cd>
+          <domain:name avail="false">rich.example</domain:name>
+          <domain:reason>In use</domain:reason>
+        </domain:cd>
+      </domain:chkData>
+    </resData>
+    <extension>
+      <fee:chkData xmlns:fee="urn:ietf:params:xml:ns:epp:fee-1.0">
+        <fee:currency>USD</fee:currency>
+        <fee:cd>
+          <fee:objID>rich.example</fee:objID>
+          <fee:class>premium</fee:class>
+          <fee:command name="create">
+            <fee:period unit="y">1</fee:period>
+            <fee:fee description="create">100.00</fee:fee>
+          </fee:command>
+        </fee:cd>
+        <fee:cd>
+          <fee:objID>rich.example</fee:objID>
+          <fee:class>premium</fee:class>
+          <fee:command name="renew">
+            <fee:period unit="y">1</fee:period>
+            <fee:fee description="renew">100.00</fee:fee>
+          </fee:command>
+        </fee:cd>
+        <fee:cd>
+          <fee:objID>rich.example</fee:objID>
+          <fee:class>premium</fee:class>
+          <fee:command name="transfer">
+            <fee:period unit="y">1</fee:period>
+            <fee:fee description="renew">100.00</fee:fee>
+          </fee:command>
+        </fee:cd>
+        <fee:cd>
+          <fee:objID>rich.example</fee:objID>
+          <fee:class>premium</fee:class>
+          <fee:command name="restore">
+            <fee:period unit="y">1</fee:period>
+            <fee:fee description="renew">100.00</fee:fee>
+            <fee:fee description="restore">17.00</fee:fee>
+          </fee:command>
+        </fee:cd>
+        <fee:cd>
+          <fee:objID>rich.example</fee:objID>
+          <fee:command name="update">
+            <fee:period unit="y">1</fee:period>
+            <fee:fee description="update">0.00</fee:fee>
+          </fee:command>
+        </fee:cd>
+      </fee:chkData>
+    </extension>
+    <trID>
+      <clTRID>ABC-12345</clTRID>
+      <svTRID>server-trid</svTRID>
+    </trID>
+  </response>
+</epp>

core/src/test/resources/google/registry/flows/domain/domain_check_fee_premium_response_v12.xml

@@ -1,4 +1,4 @@
-domain_check_fee_premium_response_v12.xml<epp xmlns="urn:ietf:params:xml:ns:epp-1.0">
+<epp xmlns="urn:ietf:params:xml:ns:epp-1.0">
   <response>
     <result code="1000">
       <msg>Command completed successfully</msg>

core/src/test/resources/google/registry/flows/domain/domain_check_fee_premium_response_v12_renew_only.xml

@@ -1,4 +1,4 @@
-domain_check_fee_premium_response_v12.xml<epp xmlns="urn:ietf:params:xml:ns:epp-1.0">
+<epp xmlns="urn:ietf:params:xml:ns:epp-1.0">
   <response>
     <result code="1000">
       <msg>Command completed successfully</msg>

core/src/test/resources/google/registry/flows/domain/domain_check_fee_premium_response_v12_with_renewal.xml

@@ -1,4 +1,4 @@
-domain_check_fee_premium_response_v12.xml<epp xmlns="urn:ietf:params:xml:ns:epp-1.0">
+<epp xmlns="urn:ietf:params:xml:ns:epp-1.0">
   <response>
     <result code="1000">
       <msg>Command completed successfully</msg>

core/src/test/resources/google/registry/flows/domain/domain_check_fee_premium_stdv1.xml

@@ -0,0 +1,19 @@
+<epp xmlns="urn:ietf:params:xml:ns:epp-1.0">
+  <command>
+    <check>
+      <domain:check xmlns:domain="urn:ietf:params:xml:ns:domain-1.0">
+        <domain:name>rich.example</domain:name>
+      </domain:check>
+    </check>
+    <extension>
+      <fee:check xmlns:fee="urn:ietf:params:xml:ns:epp:fee-1.0">
+        <fee:command name="create" />
+        <fee:command name="renew" />
+        <fee:command name="transfer" />
+        <fee:command name="restore" />
+        <fee:command name="update" />
+      </fee:check>
+    </extension>
+    <clTRID>ABC-12345</clTRID>
+  </command>
+</epp>

core/src/test/resources/google/registry/flows/domain/domain_check_fee_premium_stdv1_renew_only.xml

@@ -0,0 +1,15 @@
+<epp xmlns="urn:ietf:params:xml:ns:epp-1.0">
+  <command>
+    <check>
+      <domain:check xmlns:domain="urn:ietf:params:xml:ns:domain-1.0">
+        <domain:name>rich.example</domain:name>
+      </domain:check>
+    </check>
+    <extension>
+      <fee:check xmlns:fee="urn:ietf:params:xml:ns:epp:fee-1.0">
+        <fee:command name="renew" />
+      </fee:check>
+    </extension>
+    <clTRID>ABC-12345</clTRID>
+  </command>
+</epp>

core/src/test/resources/google/registry/flows/domain/domain_check_fee_reserved_dupes_response_stdv1.xml

@@ -0,0 +1,122 @@
+<epp xmlns="urn:ietf:params:xml:ns:epp-1.0">
+  <response>
+    <result code="1000">
+      <msg>Command completed successfully</msg>
+    </result>
+    <resData>
+      <domain:chkData xmlns:domain="urn:ietf:params:xml:ns:domain-1.0">
+        <domain:cd>
+          <domain:name avail="0">reserved.tld</domain:name>
+          <domain:reason>Reserved</domain:reason>
+        </domain:cd>
+        <domain:cd>
+          <domain:name avail="0">allowedinsunrise.tld</domain:name>
+          <domain:reason>In use</domain:reason>
+        </domain:cd>
+        <domain:cd>
+          <domain:name avail="0">allowedinsunrise.tld</domain:name>
+          <domain:reason>In use</domain:reason>
+        </domain:cd>
+        <domain:cd>
+          <domain:name avail="0">premiumcollision.tld</domain:name>
+          <domain:reason>Cannot be delegated</domain:reason>
+        </domain:cd>
+      </domain:chkData>
+    </resData>
+    <extension>
+      <fee:chkData xmlns:fee="urn:ietf:params:xml:ns:epp:fee-1.0">
+        <fee:currency>USD</fee:currency>
+        <fee:cd>
+          <fee:objID>reserved.tld</fee:objID>
+          <fee:class>reserved</fee:class>
+          <fee:command name="create">
+            <fee:period unit="y">1</fee:period>
+          </fee:command>
+        </fee:cd>
+        <fee:cd>
+          <fee:objID>reserved.tld</fee:objID>
+          <fee:command name="renew">
+            <fee:period unit="y">1</fee:period>
+            <fee:fee description="renew">11.00</fee:fee>
+          </fee:command>
+        </fee:cd>
+        <fee:cd>
+          <fee:objID>reserved.tld</fee:objID>
+          <fee:command name="transfer">
+            <fee:period unit="y">1</fee:period>
+            <fee:fee description="renew">11.00</fee:fee>
+          </fee:command>
+        </fee:cd>
+        <fee:cd>
+          <fee:objID>reserved.tld</fee:objID>
+          <fee:command name="restore">
+            <fee:period unit="y">1</fee:period>
+            <fee:fee description="restore">17.00</fee:fee>
+          </fee:command>
+        </fee:cd>
+        <fee:cd>
+          <fee:objID>allowedinsunrise.tld</fee:objID>
+          <fee:class>reserved</fee:class>
+          <fee:command name="create">
+            <fee:period unit="y">1</fee:period>
+          </fee:command>
+        </fee:cd>
+        <fee:cd>
+          <fee:objID>allowedinsunrise.tld</fee:objID>
+          <fee:command name="renew">
+            <fee:period unit="y">1</fee:period>
+            <fee:fee description="renew">11.00</fee:fee>
+          </fee:command>
+        </fee:cd>
+        <fee:cd>
+          <fee:objID>allowedinsunrise.tld</fee:objID>
+          <fee:command name="transfer">
+            <fee:period unit="y">1</fee:period>
+            <fee:fee description="renew">11.00</fee:fee>
+          </fee:command>
+        </fee:cd>
+        <fee:cd>
+          <fee:objID>allowedinsunrise.tld</fee:objID>
+          <fee:command name="restore">
+            <fee:period unit="y">1</fee:period>
+            <fee:fee description="restore">17.00</fee:fee>
+          </fee:command>
+        </fee:cd>
+        <fee:cd>
+          <fee:objID>premiumcollision.tld</fee:objID>
+          <fee:class>reserved</fee:class>
+          <fee:command name="create">
+            <fee:period unit="y">1</fee:period>
+          </fee:command>
+        </fee:cd>
+        <fee:cd>
+          <fee:objID>premiumcollision.tld</fee:objID>
+          <fee:class>premium</fee:class>
+          <fee:command name="renew">
+            <fee:period unit="y">1</fee:period>
+            <fee:fee description="renew">70.00</fee:fee>
+          </fee:command>
+        </fee:cd>
+        <fee:cd>
+          <fee:objID>premiumcollision.tld</fee:objID>
+          <fee:class>premium</fee:class>
+          <fee:command name="transfer">
+            <fee:period unit="y">1</fee:period>
+            <fee:fee description="renew">70.00</fee:fee>
+          </fee:command>
+        </fee:cd>
+        <fee:cd>
+          <fee:objID>premiumcollision.tld</fee:objID>
+          <fee:command name="restore">
+            <fee:period unit="y">1</fee:period>
+            <fee:fee description="restore">17.00</fee:fee>
+          </fee:command>
+        </fee:cd>
+      </fee:chkData>
+    </extension>
+    <trID>
+      <clTRID>ABC-12345</clTRID>
+      <svTRID>server-trid</svTRID>
+    </trID>
+  </response>
+</epp>

core/src/test/resources/google/registry/flows/domain/domain_check_fee_reserved_dupes_stdv1.xml

@@ -0,0 +1,33 @@
+<epp xmlns="urn:ietf:params:xml:ns:epp-1.0">
+  <command>
+    <check>
+      <domain:check xmlns:domain="urn:ietf:params:xml:ns:domain-1.0">
+        <domain:name>reserved.tld</domain:name>
+        <domain:name>allowedinsunrise.tld</domain:name>
+        <domain:name>allowedinsunrise.tld</domain:name>
+        <domain:name>premiumcollision.tld</domain:name>
+      </domain:check>
+    </check>
+   <extension>
+      <launch:check xmlns:launch="urn:ietf:params:xml:ns:launch-1.0" type="avail">
+        <launch:phase name="foo">custom</launch:phase>
+      </launch:check>
+      <fee:check xmlns:fee="urn:ietf:params:xml:ns:epp:fee-1.0">
+        <fee:currency>USD</fee:currency>
+        <fee:command name="create">
+          <fee:period unit="y">1</fee:period>
+        </fee:command>
+        <fee:command name="renew">
+          <fee:period unit="y">1</fee:period>
+        </fee:command>
+        <fee:command name="transfer">
+          <fee:period unit="y">1</fee:period>
+        </fee:command>
+        <fee:command name="restore">
+          <fee:period unit="y">1</fee:period>
+        </fee:command>
+      </fee:check>
+    </extension>
+    <clTRID>ABC-12345</clTRID>
+  </command>
+</epp>

core/src/test/resources/google/registry/flows/domain/domain_check_fee_reserved_response_stdv1.xml

@@ -0,0 +1,150 @@
+<epp xmlns="urn:ietf:params:xml:ns:epp-1.0">
+  <response>
+    <result code="1000">
+      <msg>Command completed successfully</msg>
+    </result>
+    <resData>
+      <domain:chkData xmlns:domain="urn:ietf:params:xml:ns:domain-1.0">
+        <domain:cd>
+          <domain:name avail="0">reserved.tld</domain:name>
+          <domain:reason>Reserved</domain:reason>
+        </domain:cd>
+        <domain:cd>
+          <domain:name avail="0">allowedinsunrise.tld</domain:name>
+          <domain:reason>Reserved</domain:reason>
+        </domain:cd>
+        <domain:cd>
+          <domain:name avail="0">collision.tld</domain:name>
+          <domain:reason>Cannot be delegated</domain:reason>
+        </domain:cd>
+        <domain:cd>
+          <domain:name avail="0">premiumcollision.tld</domain:name>
+          <domain:reason>Cannot be delegated</domain:reason>
+        </domain:cd>
+      </domain:chkData>
+    </resData>
+    <extension>
+      <fee:chkData xmlns:fee="urn:ietf:params:xml:ns:epp:fee-1.0">
+        <fee:currency>USD</fee:currency>
+        <fee:cd>
+          <fee:objID>reserved.tld</fee:objID>
+          <fee:class>reserved</fee:class>
+          <fee:command name="create">
+            <fee:period unit="y">1</fee:period>
+          </fee:command>
+        </fee:cd>
+        <fee:cd>
+          <fee:objID>reserved.tld</fee:objID>
+          <fee:command name="renew">
+            <fee:period unit="y">1</fee:period>
+            <fee:fee description="renew">11.00</fee:fee>
+          </fee:command>
+        </fee:cd>
+        <fee:cd>
+          <fee:objID>reserved.tld</fee:objID>
+          <fee:command name="transfer">
+            <fee:period unit="y">1</fee:period>
+            <fee:fee description="renew">11.00</fee:fee>
+          </fee:command>
+        </fee:cd>
+        <fee:cd>
+          <fee:objID>reserved.tld</fee:objID>
+          <fee:command name="restore">
+            <fee:period unit="y">1</fee:period>
+            <fee:fee description="restore">17.00</fee:fee>
+          </fee:command>
+        </fee:cd>
+        <fee:cd>
+          <fee:objID>allowedinsunrise.tld</fee:objID>
+          <fee:class>reserved</fee:class>
+          <fee:command name="create">
+            <fee:period unit="y">1</fee:period>
+          </fee:command>
+        </fee:cd>
+        <fee:cd>
+          <fee:objID>allowedinsunrise.tld</fee:objID>
+          <fee:command name="renew">
+            <fee:period unit="y">1</fee:period>
+            <fee:fee description="renew">11.00</fee:fee>
+          </fee:command>
+        </fee:cd>
+        <fee:cd>
+          <fee:objID>allowedinsunrise.tld</fee:objID>
+          <fee:command name="transfer">
+            <fee:period unit="y">1</fee:period>
+            <fee:fee description="renew">11.00</fee:fee>
+          </fee:command>
+        </fee:cd>
+        <fee:cd>
+          <fee:objID>allowedinsunrise.tld</fee:objID>
+          <fee:command name="restore">
+            <fee:period unit="y">1</fee:period>
+            <fee:fee description="restore">17.00</fee:fee>
+          </fee:command>
+        </fee:cd>
+        <fee:cd>
+          <fee:objID>collision.tld</fee:objID>
+          <fee:class>reserved</fee:class>
+          <fee:command name="create">
+            <fee:period unit="y">1</fee:period>
+          </fee:command>
+        </fee:cd>
+        <fee:cd>
+          <fee:objID>collision.tld</fee:objID>
+          <fee:command name="renew">
+            <fee:period unit="y">1</fee:period>
+            <fee:fee description="renew">11.00</fee:fee>
+          </fee:command>
+        </fee:cd>
+        <fee:cd>
+          <fee:objID>collision.tld</fee:objID>
+          <fee:command name="transfer">
+            <fee:period unit="y">1</fee:period>
+            <fee:fee description="renew">11.00</fee:fee>
+          </fee:command>
+        </fee:cd>
+        <fee:cd>
+          <fee:objID>collision.tld</fee:objID>
+          <fee:command name="restore">
+            <fee:period unit="y">1</fee:period>
+            <fee:fee description="restore">17.00</fee:fee>
+          </fee:command>
+        </fee:cd>
+        <fee:cd>
+          <fee:objID>premiumcollision.tld</fee:objID>
+          <fee:class>reserved</fee:class>
+          <fee:command name="create">
+            <fee:period unit="y">1</fee:period>
+          </fee:command>
+        </fee:cd>
+        <fee:cd>
+          <fee:objID>premiumcollision.tld</fee:objID>
+          <fee:class>premium</fee:class>
+          <fee:command name="renew">
+            <fee:period unit="y">1</fee:period>
+            <fee:fee description="renew">70.00</fee:fee>
+          </fee:command>
+        </fee:cd>
+        <fee:cd>
+          <fee:objID>premiumcollision.tld</fee:objID>
+          <fee:class>premium</fee:class>
+          <fee:command name="transfer">
+            <fee:period unit="y">1</fee:period>
+            <fee:fee description="renew">70.00</fee:fee>
+          </fee:command>
+        </fee:cd>
+        <fee:cd>
+          <fee:objID>premiumcollision.tld</fee:objID>
+          <fee:command name="restore">
+            <fee:period unit="y">1</fee:period>
+            <fee:fee description="restore">17.00</fee:fee>
+          </fee:command>
+        </fee:cd>
+      </fee:chkData>
+    </extension>
+    <trID>
+      <clTRID>ABC-12345</clTRID>
+      <svTRID>server-trid</svTRID>
+    </trID>
+  </response>
+</epp>

core/src/test/resources/google/registry/flows/domain/domain_check_fee_reserved_response_v11_restore_with_renewals.xml

@@ -64,8 +64,8 @@
           <fee:currency>USD</fee:currency>
           <fee:period unit="y">1</fee:period>
           <fee:fee description="renew">70.00</fee:fee>
-          <fee:class>premium</fee:class>
           <fee:fee description="restore">17.00</fee:fee>
+          <fee:class>premium</fee:class>
         </fee:cd>
       </fee:chkData>
     </extension>

core/src/test/resources/google/registry/flows/domain/domain_check_fee_reserved_stdv1.xml

@@ -0,0 +1,33 @@
+<epp xmlns="urn:ietf:params:xml:ns:epp-1.0">
+  <command>
+    <check>
+      <domain:check xmlns:domain="urn:ietf:params:xml:ns:domain-1.0">
+        <domain:name>reserved.tld</domain:name>
+        <domain:name>allowedinsunrise.tld</domain:name>
+        <domain:name>collision.tld</domain:name>
+        <domain:name>premiumcollision.tld</domain:name>
+      </domain:check>
+    </check>
+   <extension>
+      <launch:check xmlns:launch="urn:ietf:params:xml:ns:launch-1.0" type="avail">
+        <launch:phase name="foo">custom</launch:phase>
+      </launch:check>
+      <fee:check xmlns:fee="urn:ietf:params:xml:ns:epp:fee-1.0">
+        <fee:currency>USD</fee:currency>
+        <fee:command name="create">
+          <fee:period unit="y">1</fee:period>
+        </fee:command>
+        <fee:command name="renew">
+          <fee:period unit="y">1</fee:period>
+        </fee:command>
+        <fee:command name="transfer">
+          <fee:period unit="y">1</fee:period>
+        </fee:command>
+        <fee:command name="restore">
+          <fee:period unit="y">1</fee:period>
+        </fee:command>
+      </fee:check>
+    </extension>
+    <clTRID>ABC-12345</clTRID>
+  </command>
+</epp>

core/src/test/resources/google/registry/flows/domain/domain_check_fee_reserved_sunrise_response_stdv1.xml

@@ -0,0 +1,153 @@
+<epp xmlns="urn:ietf:params:xml:ns:epp-1.0">
+  <response>
+    <result code="1000">
+      <msg>Command completed successfully</msg>
+    </result>
+    <resData>
+      <domain:chkData xmlns:domain="urn:ietf:params:xml:ns:domain-1.0">
+        <domain:cd>
+          <domain:name avail="0">reserved.tld</domain:name>
+          <domain:reason>Reserved</domain:reason>
+        </domain:cd>
+        <domain:cd>
+          <domain:name avail="1">allowedinsunrise.tld</domain:name>
+        </domain:cd>
+        <domain:cd>
+          <domain:name avail="1">collision.tld</domain:name>
+        </domain:cd>
+        <domain:cd>
+          <domain:name avail="1">premiumcollision.tld</domain:name>
+        </domain:cd>
+      </domain:chkData>
+    </resData>
+    <extension>
+      <fee:chkData xmlns:fee="urn:ietf:params:xml:ns:epp:fee-1.0">
+        <fee:currency>USD</fee:currency>
+        <fee:cd>
+          <fee:objID>reserved.tld</fee:objID>
+          <fee:class>reserved</fee:class>
+          <fee:command name="create">
+            <fee:period unit="y">1</fee:period>
+          </fee:command>
+        </fee:cd>
+        <fee:cd>
+          <fee:objID>reserved.tld</fee:objID>
+          <fee:command name="renew">
+            <fee:period unit="y">1</fee:period>
+            <fee:fee description="renew">11.00</fee:fee>
+          </fee:command>
+        </fee:cd>
+        <fee:cd>
+          <fee:objID>reserved.tld</fee:objID>
+          <fee:command name="transfer">
+            <fee:period unit="y">1</fee:period>
+            <fee:fee description="renew">11.00</fee:fee>
+          </fee:command>
+        </fee:cd>
+        <fee:cd>
+          <fee:objID>reserved.tld</fee:objID>
+          <fee:command name="restore">
+            <fee:period unit="y">1</fee:period>
+            <fee:fee description="restore">17.00</fee:fee>
+          </fee:command>
+        </fee:cd>
+        <fee:cd>
+          <fee:objID>allowedinsunrise.tld</fee:objID>
+          <fee:command name="create">
+            <fee:period unit="y">1</fee:period>
+            <fee:fee description="create">11.05</fee:fee>
+          </fee:command>
+        </fee:cd>
+        <fee:cd>
+          <fee:objID>allowedinsunrise.tld</fee:objID>
+          <fee:command name="renew">
+            <fee:period unit="y">1</fee:period>
+            <fee:fee description="renew">11.00</fee:fee>
+          </fee:command>
+        </fee:cd>
+        <fee:cd>
+          <fee:objID>allowedinsunrise.tld</fee:objID>
+          <fee:command name="transfer">
+            <fee:period unit="y">1</fee:period>
+            <fee:fee description="renew">11.00</fee:fee>
+          </fee:command>
+        </fee:cd>
+        <fee:cd>
+          <fee:objID>allowedinsunrise.tld</fee:objID>
+          <fee:command name="restore">
+            <fee:period unit="y">1</fee:period>
+            <fee:fee description="restore">17.00</fee:fee>
+          </fee:command>
+        </fee:cd>
+        <fee:cd>
+          <fee:objID>collision.tld</fee:objID>
+          <fee:class>collision</fee:class>
+          <fee:command name="create">
+            <fee:period unit="y">1</fee:period>
+            <fee:fee description="create">11.05</fee:fee>
+          </fee:command>
+        </fee:cd>
+        <fee:cd>
+          <fee:objID>collision.tld</fee:objID>
+          <fee:class>collision</fee:class>
+          <fee:command name="renew">
+            <fee:period unit="y">1</fee:period>
+            <fee:fee description="renew">11.00</fee:fee>
+          </fee:command>
+        </fee:cd>
+        <fee:cd>
+          <fee:objID>collision.tld</fee:objID>
+          <fee:class>collision</fee:class>
+          <fee:command name="transfer">
+            <fee:period unit="y">1</fee:period>
+            <fee:fee description="renew">11.00</fee:fee>
+          </fee:command>
+        </fee:cd>
+        <fee:cd>
+          <fee:objID>collision.tld</fee:objID>
+          <fee:class>collision</fee:class>
+          <fee:command name="restore">
+            <fee:period unit="y">1</fee:period>
+            <fee:fee description="restore">17.00</fee:fee>
+          </fee:command>
+        </fee:cd>
+        <fee:cd>
+          <fee:objID>premiumcollision.tld</fee:objID>
+          <fee:class>premium-collision</fee:class>
+          <fee:command name="create">
+            <fee:period unit="y">1</fee:period>
+            <fee:fee description="create">59.50</fee:fee>
+          </fee:command>
+        </fee:cd>
+        <fee:cd>
+          <fee:objID>premiumcollision.tld</fee:objID>
+          <fee:class>premium-collision</fee:class>
+          <fee:command name="renew">
+            <fee:period unit="y">1</fee:period>
+            <fee:fee description="renew">70.00</fee:fee>
+          </fee:command>
+        </fee:cd>
+        <fee:cd>
+          <fee:objID>premiumcollision.tld</fee:objID>
+          <fee:class>premium-collision</fee:class>
+          <fee:command name="transfer">
+            <fee:period unit="y">1</fee:period>
+            <fee:fee description="renew">70.00</fee:fee>
+          </fee:command>
+        </fee:cd>
+        <fee:cd>
+          <fee:objID>premiumcollision.tld</fee:objID>
+          <fee:class>collision</fee:class>
+          <fee:command name="restore">
+            <fee:period unit="y">1</fee:period>
+            <fee:fee description="restore">17.00</fee:fee>
+          </fee:command>
+        </fee:cd>
+      </fee:chkData>
+    </extension>
+    <trID>
+      <clTRID>ABC-12345</clTRID>
+      <svTRID>server-trid</svTRID>
+    </trID>
+  </response>
+</epp>

core/src/test/resources/google/registry/flows/domain/domain_check_fee_response_default_token_stdv1.xml

@@ -0,0 +1,51 @@
+<epp xmlns="urn:ietf:params:xml:ns:epp-1.0">
+  <response>
+    <result code="1000">
+      <msg>Command completed successfully</msg>
+    </result>
+    <resData>
+      <domain:chkData xmlns:domain="urn:ietf:params:xml:ns:domain-1.0">
+        <domain:cd>
+          <domain:name avail="0">example1.tld</domain:name>
+          <domain:reason>In use</domain:reason>
+        </domain:cd>
+        <domain:cd>
+          <domain:name avail="1">example2.tld</domain:name>
+        </domain:cd>
+        <domain:cd>
+          <domain:name avail="1">example3.tld</domain:name>
+        </domain:cd>
+      </domain:chkData>
+    </resData>
+    <extension>
+      <fee:chkData xmlns:fee="urn:ietf:params:xml:ns:epp:fee-1.0">
+        <fee:currency>USD</fee:currency>
+        <fee:cd>
+          <fee:objID>example1.tld</fee:objID>
+          <fee:command name="create">
+            <fee:period unit="y">1</fee:period>
+            <fee:fee description="create">6.50</fee:fee>
+          </fee:command>
+        </fee:cd>
+        <fee:cd>
+          <fee:objID>example2.tld</fee:objID>
+          <fee:command name="create">
+            <fee:period unit="y">1</fee:period>
+            <fee:fee description="create">6.50</fee:fee>
+          </fee:command>
+        </fee:cd>
+        <fee:cd>
+          <fee:objID>example3.tld</fee:objID>
+          <fee:command name="create">
+            <fee:period unit="y">1</fee:period>
+            <fee:fee description="create">6.50</fee:fee>
+          </fee:command>
+        </fee:cd>
+      </fee:chkData>
+    </extension>
+    <trID>
+      <clTRID>ABC-12345</clTRID>
+      <svTRID>server-trid</svTRID>
+    </trID>
+  </response>
+</epp>

core/src/test/resources/google/registry/flows/domain/domain_check_fee_response_stdv1.xml

@@ -0,0 +1,51 @@
+<epp xmlns="urn:ietf:params:xml:ns:epp-1.0">
+  <response>
+    <result code="1000">
+      <msg>Command completed successfully</msg>
+    </result>
+    <resData>
+      <domain:chkData xmlns:domain="urn:ietf:params:xml:ns:domain-1.0">
+        <domain:cd>
+          <domain:name avail="0">example1.tld</domain:name>
+          <domain:reason>In use</domain:reason>
+        </domain:cd>
+        <domain:cd>
+          <domain:name avail="1">example2.tld</domain:name>
+        </domain:cd>
+        <domain:cd>
+          <domain:name avail="1">example3.tld</domain:name>
+        </domain:cd>
+      </domain:chkData>
+    </resData>
+    <extension>
+      <fee:chkData xmlns:fee="urn:ietf:params:xml:ns:epp:fee-1.0">
+        <fee:currency>USD</fee:currency>
+        <fee:cd>
+          <fee:objID>example1.tld</fee:objID>
+          <fee:command name="create">
+            <fee:period unit="y">1</fee:period>
+            <fee:fee description="create">13.00</fee:fee>
+          </fee:command>
+        </fee:cd>
+        <fee:cd>
+          <fee:objID>example2.tld</fee:objID>
+          <fee:command name="create">
+            <fee:period unit="y">1</fee:period>
+            <fee:fee description="create">13.00</fee:fee>
+          </fee:command>
+        </fee:cd>
+        <fee:cd>
+          <fee:objID>example3.tld</fee:objID>
+          <fee:command name="create">
+            <fee:period unit="y">1</fee:period>
+            <fee:fee description="create">13.00</fee:fee>
+          </fee:command>
+        </fee:cd>
+      </fee:chkData>
+    </extension>
+    <trID>
+      <clTRID>ABC-12345</clTRID>
+      <svTRID>server-trid</svTRID>
+    </trID>
+  </response>
+</epp>

core/src/test/resources/google/registry/flows/domain/domain_check_fee_stdv1.xml

@@ -0,0 +1,24 @@
+<!-- From domain_check_fee_v12.xml, removed `fee:class` line -->
+<epp xmlns="urn:ietf:params:xml:ns:epp-1.0">
+  <command>
+    <check>
+      <domain:check xmlns:domain="urn:ietf:params:xml:ns:domain-1.0">
+        <domain:name>example1.tld</domain:name>
+        <domain:name>example2.tld</domain:name>
+        <domain:name>example3.tld</domain:name>
+      </domain:check>
+    </check>
+   <extension>
+      <launch:check xmlns:launch="urn:ietf:params:xml:ns:launch-1.0" type="avail">
+        <launch:phase name="foo">custom</launch:phase>
+      </launch:check>
+      <fee:check xmlns:fee="urn:ietf:params:xml:ns:epp:fee-1.0">
+        <fee:currency>USD</fee:currency>
+        <fee:command name="create">
+          <fee:period unit="y">1</fee:period>
+        </fee:command>
+      </fee:check>
+    </extension>
+    <clTRID>ABC-12345</clTRID>
+  </command>
+</epp>

core/src/test/resources/google/registry/flows/domain/domain_check_tiered_promotion_fee_response_v12.xml

@@ -1,4 +1,4 @@
-<epp xmlns:domain="urn:ietf:params:xml:ns:domain-1.0" xmlns:contact="urn:ietf:params:xml:ns:contact-1.0" xmlns:fee="urn:ietf:params:xml:ns:fee-0.6" xmlns="urn:ietf:params:xml:ns:epp-1.0" xmlns:rgp="urn:ietf:params:xml:ns:rgp-1.0" xmlns:bulkToken="urn:google:params:xml:ns:bulkToken-1.0" xmlns:fee11="urn:ietf:params:xml:ns:fee-0.11" xmlns:fee="urn:ietf:params:xml:ns:fee-0.12" xmlns:launch="urn:ietf:params:xml:ns:launch-1.0" xmlns:secDNS="urn:ietf:params:xml:ns:secDNS-1.1" xmlns:host="urn:ietf:params:xml:ns:host-1.0">
+<epp xmlns:domain="urn:ietf:params:xml:ns:domain-1.0" xmlns:contact="urn:ietf:params:xml:ns:contact-1.0" xmlns="urn:ietf:params:xml:ns:epp-1.0" xmlns:rgp="urn:ietf:params:xml:ns:rgp-1.0" xmlns:bulkToken="urn:google:params:xml:ns:bulkToken-1.0" xmlns:fee="urn:ietf:params:xml:ns:fee-0.12" xmlns:launch="urn:ietf:params:xml:ns:launch-1.0" xmlns:secDNS="urn:ietf:params:xml:ns:secDNS-1.1" xmlns:host="urn:ietf:params:xml:ns:host-1.0">
     <response>
         <result code="1000">
             <msg>Command completed successfully</msg>

core/src/test/resources/google/registry/flows/domain/domain_update.xml

@@ -15,7 +15,6 @@
           <domain:ns>
             <domain:hostObj>ns1.example.foo</domain:hostObj>
           </domain:ns>
-          <domain:status s="clientUpdateProhibited"/>
         </domain:rem>
         <domain:chg>
           <domain:authInfo>

core/src/test/resources/google/registry/flows/domain/domain_update_empty_registrant.xml

@@ -17,7 +17,6 @@
             <domain:hostObj>ns1.example.foo</domain:hostObj>
           </domain:ns>
           <domain:contact type="tech">sh8013</domain:contact>
-          <domain:status s="clientUpdateProhibited"/>
         </domain:rem>
         <domain:chg>
           <domain:registrant/>

core/src/test/resources/google/registry/flows/domain/domain_update_no_auth_change.xml

@@ -15,7 +15,6 @@
           <domain:ns>
             <domain:hostObj>ns1.example.foo</domain:hostObj>
           </domain:ns>
-          <domain:status s="clientUpdateProhibited"/>
         </domain:rem>
       </domain:update>
     </update>

core/src/test/resources/google/registry/flows/domain/domain_update_no_cltrid.xml

@@ -15,7 +15,6 @@
           <domain:ns>
             <domain:hostObj>ns1.example.foo</domain:hostObj>
           </domain:ns>
-          <domain:status s="clientUpdateProhibited"/>
         </domain:rem>
         <domain:chg>
           <domain:authInfo>

core/src/test/resources/google/registry/flows/domain/domain_update_prohibited_status.xml

@@ -15,7 +15,6 @@
           <domain:ns>
             <domain:hostObj>ns1.example.foo</domain:hostObj>
           </domain:ns>
-          <domain:status s="clientUpdateProhibited"/>
         </domain:rem>
         <domain:chg>
           <domain:authInfo>

core/src/test/resources/google/registry/flows/domain/domain_update_remove_client_update_prohibited.xml

@@ -0,0 +1,16 @@
+<epp xmlns="urn:ietf:params:xml:ns:epp-1.0">
+  <command>
+    <update>
+      <domain:update
+       xmlns:domain="urn:ietf:params:xml:ns:domain-1.0">
+        <domain:name>example.tld</domain:name>
+        <domain:add />
+        <domain:rem>
+          <domain:status s="clientUpdateProhibited"/>
+        </domain:rem>
+        <domain:chg />
+      </domain:update>
+    </update>
+    <clTRID>ABC-12345</clTRID>
+  </command>
+</epp>

core/src/test/resources/google/registry/flows/domain/domain_update_remove_contact.xml

@@ -15,7 +15,6 @@
           <domain:ns>
             <domain:hostObj>ns1.example.foo</domain:hostObj>
           </domain:ns>
-          <domain:status s="clientUpdateProhibited"/>
         </domain:rem>
         <domain:chg>
           <domain:authInfo>

core/src/test/resources/google/registry/flows/domain_update_dsdata_rem.xml

@@ -16,7 +16,7 @@
             <secDNS:keyTag>12346</secDNS:keyTag>
             <secDNS:alg>3</secDNS:alg>
             <secDNS:digestType>1</secDNS:digestType>
-            <secDNS:digest>38EC35D5B3A34B44C39B</secDNS:digest>
+            <secDNS:digest>A94A8FE5CCB19BA61C4C0873D391E987982FBBD3</secDNS:digest>
           </secDNS:dsData>
         </secDNS:rem>
       </secDNS:update>

core/src/test/resources/google/registry/flows/greeting.xml

@@ -6,7 +6,6 @@
       <version>1.0</version>
       <lang>en</lang>
       <objURI>urn:ietf:params:xml:ns:host-1.0</objURI>
-      <objURI>urn:ietf:params:xml:ns:contact-1.0</objURI>
       <objURI>urn:ietf:params:xml:ns:domain-1.0</objURI>
       <svcExtension>
         <extURI>urn:ietf:params:xml:ns:launch-1.0</extURI>
@@ -15,6 +14,7 @@
         <extURI>urn:ietf:params:xml:ns:fee-0.6</extURI>
         <extURI>urn:ietf:params:xml:ns:fee-0.11</extURI>
         <extURI>urn:ietf:params:xml:ns:fee-0.12</extURI>
+        <extURI>urn:ietf:params:xml:ns:epp:fee-1.0</extURI>
       </svcExtension>
     </svcMenu>
     <dcp>

core/src/test/resources/google/registry/flows/login.xml

@@ -10,7 +10,6 @@
       <svcs>
         <objURI>urn:ietf:params:xml:ns:host-1.0</objURI>
         <objURI>urn:ietf:params:xml:ns:domain-1.0</objURI>
-        <objURI>urn:ietf:params:xml:ns:contact-1.0</objURI>
         <svcExtension>
           <extURI>urn:ietf:params:xml:ns:launch-1.0</extURI>
           <extURI>urn:ietf:params:xml:ns:rgp-1.0</extURI>

core/src/test/resources/google/registry/flows/login_update_password.xml

@@ -11,7 +11,6 @@
       <svcs>
         <objURI>urn:ietf:params:xml:ns:host-1.0</objURI>
         <objURI>urn:ietf:params:xml:ns:domain-1.0</objURI>
-        <objURI>urn:ietf:params:xml:ns:contact-1.0</objURI>
         <svcExtension>
           <extURI>urn:ietf:params:xml:ns:launch-1.0</extURI>
           <extURI>urn:ietf:params:xml:ns:rgp-1.0</extURI>

core/src/test/resources/google/registry/flows/login_valid_fee_extension.xml

@@ -10,7 +10,6 @@
       <svcs>
         <objURI>urn:ietf:params:xml:ns:host-1.0</objURI>
         <objURI>urn:ietf:params:xml:ns:domain-1.0</objURI>
-        <objURI>urn:ietf:params:xml:ns:contact-1.0</objURI>
         <svcExtension>
           <extURI>urn:ietf:params:xml:ns:launch-1.0</extURI>
           <extURI>urn:ietf:params:xml:ns:rgp-1.0</extURI>

core/src/test/resources/google/registry/flows/login_wrong_case.xml

@@ -11,7 +11,6 @@
       <svcs>
         <objURI>urn:ietf:params:xml:ns:host-1.0</objURI>
         <objURI>urn:ietf:params:xml:ns:domain-1.0</objURI>
-        <objURI>urn:ietf:params:xml:ns:contact-1.0</objURI>
         <svcExtension>
           <extURI>urn:ietf:params:xml:ns:launch-1.0</extURI>
           <extURI>urn:ietf:params:xml:ns:rgp-1.0</extURI>

core/src/test/resources/google/registry/flows/session/greeting.xml

@@ -6,7 +6,6 @@
       <version>1.0</version>
       <lang>en</lang>
       <objURI>urn:ietf:params:xml:ns:host-1.0</objURI>
-      <objURI>urn:ietf:params:xml:ns:contact-1.0</objURI>
       <objURI>urn:ietf:params:xml:ns:domain-1.0</objURI>
       <svcExtension>
         <extURI>urn:ietf:params:xml:ns:launch-1.0</extURI>
@@ -15,6 +14,7 @@
         <extURI>urn:ietf:params:xml:ns:fee-0.6</extURI>
         <extURI>urn:ietf:params:xml:ns:fee-0.11</extURI>
         <extURI>urn:ietf:params:xml:ns:fee-0.12</extURI>
+        <extURI>urn:ietf:params:xml:ns:epp:fee-1.0</extURI>
       </svcExtension>
     </svcMenu>
     <dcp>

core/src/test/resources/google/registry/flows/session/login_invalid_extension.xml

@@ -10,7 +10,6 @@
       <svcs>
         <objURI>urn:ietf:params:xml:ns:host-1.0</objURI>
         <objURI>urn:ietf:params:xml:ns:domain-1.0</objURI>
-        <objURI>urn:ietf:params:xml:ns:contact-1.0</objURI>
         <svcExtension>
           <extURI>http://custom/obj1ext-1.0</extURI>
         </svcExtension>

core/src/test/resources/google/registry/flows/session/login_invalid_language.xml

@@ -10,7 +10,6 @@
       <svcs>
         <objURI>urn:ietf:params:xml:ns:host-1.0</objURI>
         <objURI>urn:ietf:params:xml:ns:domain-1.0</objURI>
-        <objURI>urn:ietf:params:xml:ns:contact-1.0</objURI>
       </svcs>
     </login>
     <clTRID>ABC-12345</clTRID>

core/src/test/resources/google/registry/flows/session/login_invalid_types.xml

@@ -10,7 +10,6 @@
       <svcs>
         <objURI>urn:ietf:params:xml:ns:host-1.0</objURI>
         <objURI>urn:ietf:params:xml:ns:domain-1.0</objURI>
-        <objURI>urn:ietf:params:xml:ns:contact-1.0</objURI>
         <objURI>urn:ietf:params:xml:ns:foo-1.0</objURI>
       </svcs>
     </login>

core/src/test/resources/google/registry/flows/session/login_invalid_version.xml

@@ -10,7 +10,6 @@
       <svcs>
         <objURI>urn:ietf:params:xml:ns:host-1.0</objURI>
         <objURI>urn:ietf:params:xml:ns:domain-1.0</objURI>
-        <objURI>urn:ietf:params:xml:ns:contact-1.0</objURI>
       </svcs>
     </login>
     <clTRID>ABC-12345</clTRID>

core/src/test/resources/google/registry/flows/session/login_set_new_password.xml

@@ -11,7 +11,6 @@
       <svcs>
         <objURI>urn:ietf:params:xml:ns:host-1.0</objURI>
         <objURI>urn:ietf:params:xml:ns:domain-1.0</objURI>
-        <objURI>urn:ietf:params:xml:ns:contact-1.0</objURI>
       </svcs>
     </login>
     <clTRID>ABC-12345</clTRID>

core/src/test/resources/google/registry/flows/session/login_valid.xml

@@ -10,7 +10,6 @@
       <svcs>
         <objURI>urn:ietf:params:xml:ns:host-1.0</objURI>
         <objURI>urn:ietf:params:xml:ns:domain-1.0</objURI>
-        <objURI>urn:ietf:params:xml:ns:contact-1.0</objURI>
       </svcs>
     </login>
     <clTRID>ABC-12345</clTRID>

core/src/test/resources/google/registry/flows/syntax_error.xml

@@ -12,7 +12,6 @@ xsi:schemaLocation="urn:ietf:params:xml:ns:epp-1.0 epp-1.0.xsd">
       </options>
       <svcs>
         <objURI>urn:ietf:params:xml:ns:domain-1.0</objURI>
-        <objURI>urn:ietf:params:xml:ns:contact-1.0</objURI>
         <objURI>urn:ietf:params:xml:ns:host-1.0</objURI>
         <svcExtension>
           <extURI>urn:ietf:params:xml:ns:secDNS-1.1</extURI>

core/src/test/resources/google/registry/model/eppinput/login_valid.xml

@@ -10,7 +10,6 @@
       <svcs>
         <objURI>urn:ietf:params:xml:ns:host-1.0</objURI>
         <objURI>urn:ietf:params:xml:ns:domain-1.0</objURI>
-        <objURI>urn:ietf:params:xml:ns:contact-1.0</objURI>
         <svcExtension>
           <extURI>urn:ietf:params:xml:ns:launch-1.0</extURI>
           <extURI>urn:ietf:params:xml:ns:rgp-1.0</extURI>