Imports github.com/golang/protobuf/proto github.com/hyperledger/sawtooth-sdk-go/logging github.com/hyperledger/sawtooth-sdk-go/protobuf/transaction_pb2 github.com/hyperledger/sawtooth-sdk-go/signing github.com/hyperledger/sawtooth-sdk-go/protobuf/batch_pb2 Standard library imports bytes common encoding/base64 encoding/hex encoding/json fmt io/ioutil net/http protobuf/seth_pb2 time crypto/sha512