package sign import ( "crypto/ecdsa" "crypto/sha256" "time" "github.com/fbsobreira/gotron-sdk/pkg/proto/core" "github.com/golang/protobuf/proto" "github.com/rocboss/paopao-ce/pkg/crypto" ) // SignTransaction 签名交易 func SignTransaction(transaction *core.Transaction, key *ecdsa.PrivateKey) ([]byte, error) { transaction.GetRawData().Timestamp = time.Now().UnixNano() / 1000000 rawData, err := proto.Marshal(transaction.GetRawData()) if err != nil { return nil, err } h256h := sha256.New() h256h.Write(rawData) hash := h256h.Sum(nil) contractList := transaction.GetRawData().GetContract() for range contractList { signature, err := crypto.Sign(hash, key) if err != nil { return nil, err } transaction.Signature = append(transaction.Signature, signature) } return hash, nil } func TrimLeftZeroes(s []byte) []byte { idx := 0 for ; idx < len(s); idx++ { if s[idx] != 48 { break } } return s[idx:] }