types: add AppVersion to ConsensusParams (#5031)

Co-authored-by: JamesRay <66258875@qq.com>

making it possible to change app version via EndBlock

types/params.go

@@ -30,6 +30,7 @@ func DefaultConsensusParams() *tmproto.ConsensusParams {
 		Block:     DefaultBlockParams(),
 		Evidence:  DefaultEvidenceParams(),
 		Validator: DefaultValidatorParams(),
+		Version:   DefaultVersionParams(),
 	}
 }
 
@@ -60,6 +61,12 @@ func DefaultValidatorParams() tmproto.ValidatorParams {
 	}
 }
 
+func DefaultVersionParams() tmproto.VersionParams {
+	return tmproto.VersionParams{
+		AppVersion: 0,
+	}
+}
+
 func IsValidPubkeyType(params tmproto.ValidatorParams, pubkeyType string) bool {
 	for i := 0; i < len(params.PubKeyTypes); i++ {
 		if params.PubKeyTypes[i] == pubkeyType {
@@ -182,5 +189,8 @@ func UpdateConsensusParams(params tmproto.ConsensusParams, params2 *abci.Consens
 		// This avoids having to initialize the slice to 0 values, and then write to it again.
 		res.Validator.PubKeyTypes = append([]string{}, params2.Validator.PubKeyTypes...)
 	}
+	if params2.Version != nil {
+		res.Version.AppVersion = params2.Version.AppVersion
+	}
 	return res
 }

types/params_test.go

@@ -138,3 +138,14 @@ func TestConsensusParamsUpdate(t *testing.T) {
 		assert.Equal(t, tc.updatedParams, UpdateConsensusParams(tc.params, tc.updates))
 	}
 }
+
+func TestConsensusParamsUpdate_AppVersion(t *testing.T) {
+	params := makeParams(1, 2, 10, 3, 0, valEd25519)
+
+	assert.EqualValues(t, 0, params.Version.AppVersion)
+
+	updated := UpdateConsensusParams(params,
+		&abci.ConsensusParams{Version: &tmproto.VersionParams{AppVersion: 1}})
+
+	assert.EqualValues(t, 1, updated.Version.AppVersion)
+}