Imports
- github.com/golang/protobuf/proto
- github.com/golang/protobuf/ptypes/timestamp
- github.com/iotexproject/iotex-core/pkg/hash
- github.com/iotexproject/iotex-core/pkg/keypair
- github.com/iotexproject/iotex-core/pkg/log
- github.com/iotexproject/iotex-core/pkg/util/byteutil
- github.com/iotexproject/iotex-core/pkg/version
- github.com/iotexproject/iotex-core/protogen/iotextypes
- github.com/iotexproject/iotex-core/state
- github.com/pkg/errors