mocktikv: add the missing ConflictCommitTS

store/mockstore/mocktikv/errors.go

@@ -70,9 +70,10 @@ func (e ErrAlreadyCommitted) Error() string {
 
 // ErrConflict is returned when the commitTS of key in the DB is greater than startTS.
 type ErrConflict struct {
-	StartTS    uint64
-	ConflictTS uint64
-	Key        []byte
+	StartTS          uint64
+	ConflictTS       uint64
+	ConflictCommitTS uint64
+	Key              []byte
 }
 
 func (e *ErrConflict) Error() string {

store/mockstore/mocktikv/mvcc_leveldb.go

@@ -655,9 +655,10 @@ func checkConflictValue(iter *Iterator, m *kvrpcpb.Mutation, startTS uint64) err
 	// Note that it's a write conflict here, even if the value is a rollback one.
 	if dec.value.commitTS >= startTS {
 		return &ErrConflict{
-			StartTS:    startTS,
-			ConflictTS: dec.value.commitTS,
-			Key:        m.Key,
+			StartTS:          startTS,
+			ConflictTS:       dec.value.startTS,
+			ConflictCommitTS: dec.value.commitTS,
+			Key:              m.Key,
 		}
 	}
 

store/mockstore/mocktikv/rpc.go

@@ -73,9 +73,10 @@ func convertToKeyError(err error) *kvrpcpb.KeyError {
 	if writeConflict, ok := errors.Cause(err).(*ErrConflict); ok {
 		return &kvrpcpb.KeyError{
 			Conflict: &kvrpcpb.WriteConflict{
-				Key:        writeConflict.Key,
-				ConflictTs: writeConflict.ConflictTS,
-				StartTs:    writeConflict.StartTS,
+				Key:              writeConflict.Key,
+				ConflictTs:       writeConflict.ConflictTS,
+				ConflictCommitTs: writeConflict.ConflictCommitTS,
+				StartTs:          writeConflict.StartTS,
 			},
 		}
 	}