removed timestamp from canonical vote so they won't be signed

types/canonical_json.go

@@ -34,13 +34,12 @@ type CanonicalJSONProposal struct {
 }
 
 type CanonicalJSONVote struct {
-	ChainID   string               `json:"@chain_id"`
-	Type      string               `json:"@type"`
-	BlockID   CanonicalJSONBlockID `json:"block_id"`
-	Height    int64                `json:"height"`
-	Round     int                  `json:"round"`
-	Timestamp string               `json:"timestamp"`
-	VoteType  byte                 `json:"type"`
+	ChainID  string               `json:"@chain_id"`
+	Type     string               `json:"@type"`
+	BlockID  CanonicalJSONBlockID `json:"block_id"`
+	Height   int64                `json:"height"`
+	Round    int                  `json:"round"`
+	VoteType byte                 `json:"type"`
 }
 
 type CanonicalJSONHeartbeat struct {
@@ -85,13 +84,12 @@ func CanonicalProposal(chainID string, proposal *Proposal) CanonicalJSONProposal
 
 func CanonicalVote(chainID string, vote *Vote) CanonicalJSONVote {
 	return CanonicalJSONVote{
-		ChainID:   chainID,
-		Type:      "vote",
-		BlockID:   CanonicalBlockID(vote.BlockID),
-		Height:    vote.Height,
-		Round:     vote.Round,
-		Timestamp: CanonicalTime(vote.Timestamp),
-		VoteType:  vote.Type,
+		ChainID:  chainID,
+		Type:     "vote",
+		BlockID:  CanonicalBlockID(vote.BlockID),
+		Height:   vote.Height,
+		Round:    vote.Round,
+		VoteType: vote.Type,
 	}
 }
 

types/vote_test.go

@@ -43,7 +43,7 @@ func TestVoteSignable(t *testing.T) {
 	signBytes := vote.SignBytes("test_chain_id")
 	signStr := string(signBytes)
 
-	expected := `{"@chain_id":"test_chain_id","@type":"vote","block_id":{"hash":"68617368","parts":{"hash":"70617274735F68617368","total":1000000}},"height":12345,"round":2,"timestamp":"2017-12-25T03:00:01.234Z","type":2}`
+	expected := `{"@chain_id":"test_chain_id","@type":"vote","block_id":{"hash":"68617368","parts":{"hash":"70617274735F68617368","total":1000000}},"height":12345,"round":2,"type":2}`
 	if signStr != expected {
 		// NOTE: when this fails, you probably want to fix up consensus/replay_test too
 		t.Errorf("Got unexpected sign string for Vote. Expected:\n%v\nGot:\n%v", expected, signStr)