Add currentPackageToken on create flow (#1751)

* Add currentPackageToken on create flow

* Change to Truth8 assertion

* Add check for specified renewal behavior

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

@@ -390,6 +390,11 @@ public final class DomainCreateFlow implements TransactionalFlow {
             .addGracePeriod(
                 GracePeriod.forBillingEvent(GracePeriodStatus.ADD, repoId, createBillingEvent))
             .build();
+    if (allocationToken.isPresent()
+        && allocationToken.get().getTokenType().equals(TokenType.PACKAGE)) {
+      domain =
+          domain.asBuilder().setCurrentPackageToken(allocationToken.get().createVKey()).build();
+    }
     DomainHistory domainHistory =
         buildDomainHistory(domain, registry, now, period, registry.getAddGracePeriodLength());
     if (reservationTypes.contains(NAME_COLLISION)) {

core/src/main/java/google/registry/model/domain/token/AllocationToken.java

@@ -105,6 +105,7 @@ public class AllocationToken extends BackupGroupRoot implements Buildable {
 
   /** Single-use tokens are invalid after use. Infinite-use tokens, predictably, are not. */
   public enum TokenType {
+    PACKAGE,
     SINGLE_USE,
     UNLIMITED_USE
   }
@@ -274,6 +275,10 @@ public class AllocationToken extends BackupGroupRoot implements Buildable {
     public AllocationToken build() {
       checkArgumentNotNull(getInstance().tokenType, "Token type must be specified");
       checkArgument(!Strings.isNullOrEmpty(getInstance().token), "Token must not be null or empty");
+      checkArgument(
+          !getInstance().tokenType.equals(TokenType.PACKAGE)
+              || getInstance().renewalPriceBehavior.equals(RenewalPriceBehavior.SPECIFIED),
+          "Package tokens must have renewalPriceBehavior set to SPECIFIED");
       checkArgument(
           getInstance().domainName == null || TokenType.SINGLE_USE.equals(getInstance().tokenType),
           "Domain name can only be specified for SINGLE_USE tokens");