proto: merge the proposer-based timestamps parameters (#393)

proto/tendermint/types/params.proto

@@ -13,6 +13,7 @@ message ConsensusParams {
   EvidenceParams  evidence  = 2;
   ValidatorParams validator = 3;
   VersionParams   version   = 4;
+  SynchronyParams synchrony = 5;
 }
 
 // BlockParams contains limits on the block size.
@@ -65,3 +66,18 @@ message HashedParams {
   int64 block_max_bytes = 1;
   int64 block_max_gas   = 2;
 }
+
+// SynchronyParams configure the bounds under which a proposed block's timestamp is considered valid.
+// These parameters are part of the proposer-based timestamps algorithm. For more information,
+// see the specification of proposer-based timestamps:
+// https://github.com/tendermint/spec/tree/master/spec/consensus/proposer-based-timestamp
+message SynchronyParams {
+  // message_delay bounds how long a proposal message may take to reach all validators on a newtork
+  // and still be considered valid.
+  google.protobuf.Duration message_delay = 1
+      [(gogoproto.stdduration) = true];
+  // precision bounds how skewed a proposer's clock may be from any validator
+  // on the network while still producing valid proposals.
+  google.protobuf.Duration precision = 2
+      [(gogoproto.stdduration) = true];
+}

spec/abci/abci.md

@@ -737,6 +737,7 @@ Most of the data structures used in ABCI are shared [common data structures](../
     | evidence  | [EvidenceParams](../core/data_structures.md#evidenceparams)   | Parameters limiting the validity of evidence of byzantine behaviour.         | 2            |
     | validator | [ValidatorParams](../core/data_structures.md#validatorparams) | Parameters limiting the types of public keys validators can use.             | 3            |
     | version   | [VersionsParams](../core/data_structures.md#versionparams)       | The ABCI application version.                                                | 4            |
+    | synchrony  | [SynchronyParams](../core/data_structures.md#synchronyparams)   | Parameters that determine the bounds under which a proposed block's timestamp is considered valid.                                                | 4            |
 
 ### ProofOps
 

spec/core/data_structures.md

@@ -5,38 +5,39 @@ Here we describe the data structures in the Tendermint blockchain and the rules
 The Tendermint blockchains consists of a short list of data types:
 
 - [Data Structures](#data-structures)
-  - [Block](#block)
-  - [Execution](#execution)
-  - [Header](#header)
-  - [Version](#version)
-  - [BlockID](#blockid)
-  - [PartSetHeader](#partsetheader)
-  - [Part](#part)
-  - [Time](#time)
-  - [Data](#data)
-  - [Commit](#commit)
-  - [CommitSig](#commitsig)
-  - [BlockIDFlag](#blockidflag)
-  - [Vote](#vote)
-  - [CanonicalVote](#canonicalvote)
-  - [Proposal](#proposal)
-  - [SignedMsgType](#signedmsgtype)
-  - [Signature](#signature)
-  - [EvidenceList](#evidencelist)
-  - [Evidence](#evidence)
-    - [DuplicateVoteEvidence](#duplicatevoteevidence)
-    - [LightClientAttackEvidence](#lightclientattackevidence)
-  - [LightBlock](#lightblock)
-  - [SignedHeader](#signedheader)
-  - [ValidatorSet](#validatorset)
-  - [Validator](#validator)
-  - [Address](#address)
-  - [ConsensusParams](#consensusparams)
-    - [BlockParams](#blockparams)
-    - [EvidenceParams](#evidenceparams)
-    - [ValidatorParams](#validatorparams)
-    - [VersionParams](#versionparams)
-  - [Proof](#proof)
+    - [Block](#block)
+    - [Execution](#execution)
+    - [Header](#header)
+    - [Version](#version)
+    - [BlockID](#blockid)
+    - [PartSetHeader](#partsetheader)
+    - [Part](#part)
+    - [Time](#time)
+    - [Data](#data)
+    - [Commit](#commit)
+    - [CommitSig](#commitsig)
+    - [BlockIDFlag](#blockidflag)
+    - [Vote](#vote)
+    - [CanonicalVote](#canonicalvote)
+    - [Proposal](#proposal)
+    - [SignedMsgType](#signedmsgtype)
+    - [Signature](#signature)
+    - [EvidenceList](#evidencelist)
+    - [Evidence](#evidence)
+        - [DuplicateVoteEvidence](#duplicatevoteevidence)
+        - [LightClientAttackEvidence](#lightclientattackevidence)
+    - [LightBlock](#lightblock)
+    - [SignedHeader](#signedheader)
+    - [ValidatorSet](#validatorset)
+    - [Validator](#validator)
+    - [Address](#address)
+    - [ConsensusParams](#consensusparams)
+        - [BlockParams](#blockparams)
+        - [EvidenceParams](#evidenceparams)
+        - [ValidatorParams](#validatorparams)
+        - [VersionParams](#versionparams)
+        - [SynchronyParams](#synchronyparams)
+    - [Proof](#proof)
 
 
 ## Block
@@ -446,6 +447,13 @@ func SumTruncated(bz []byte) []byte {
 |-------------|--------|-------------------------------|--------------|
 | app_version | uint64 | The ABCI application version. | 1            |
 
+### SynchronyParams
+
+| Name          | Type   | Description                   | Field Number |
+|---------------|--------|-------------------------------|--------------|
+| message_delay | [google.protobuf.Duration](https://developers.google.com/protocol-buffers/docs/reference/google.protobuf#google.protobuf.Duration) | Bound for how long a proposal message may take to reach all validators on a newtork and still be considered valid. | 1            |
+| precision     | [google.protobuf.Duration](https://developers.google.com/protocol-buffers/docs/reference/google.protobuf#google.protobuf.Duration) | Bound for how skewed a proposer's clock may be from any validator on the network while still producing valid proposals. | 2            |
+
 ## Proof
 
 | Name      | Type           | Description                                   | Field Number |