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builder.go
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builder.go
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// Copyright (C) 2017, 2018, 2019 EGAAS S.A.
//
// This program is free software; you can redistribute it and/or modify
// it under the terms of the GNU General Public License as published by
// the Free Software Foundation; either version 2 of the License, or (at
// your option) any later version.
//
// This program is distributed in the hope that it will be useful, but
// WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
// General Public License for more details.
//
// You should have received a copy of the GNU General Public License
// along with this program; if not, write to the Free Software
// Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
package tx
import (
"github.com/AplaProject/go-apla/packages/consts"
"github.com/AplaProject/go-apla/packages/converter"
"github.com/AplaProject/go-apla/packages/crypto"
"github.com/AplaProject/go-apla/packages/model"
log "github.com/sirupsen/logrus"
"gopkg.in/vmihailenco/msgpack.v2"
)
func newTransaction(smartTx SmartContract, privateKey []byte, internal bool) (data, hash []byte, err error) {
var publicKey []byte
if publicKey, err = crypto.PrivateToPublic(privateKey); err != nil {
log.WithFields(log.Fields{"type": consts.CryptoError, "error": err}).Error("converting node private key to public")
return
}
smartTx.PublicKey = publicKey
if internal {
smartTx.SignedBy = crypto.Address(publicKey)
}
if data, err = msgpack.Marshal(smartTx); err != nil {
log.WithFields(log.Fields{"type": consts.MarshallingError, "error": err}).Error("marshalling smart contract to msgpack")
return
}
if hash, err = crypto.DoubleHash(data); err != nil {
log.WithFields(log.Fields{"type": consts.CryptoError, "error": err}).Error("calculating hash of smart contract")
return
}
signature, err := crypto.Sign(privateKey, hash)
if err != nil {
log.WithFields(log.Fields{"type": consts.CryptoError, "error": err}).Error("signing by node private key")
return
}
data = append(append([]byte{128}, converter.EncodeLengthPlusData(data)...), converter.EncodeLengthPlusData(signature)...)
return
}
func NewInternalTransaction(smartTx SmartContract, privateKey []byte) (data, hash []byte, err error) {
return newTransaction(smartTx, privateKey, true)
}
func NewTransaction(smartTx SmartContract, privateKey []byte) (data, hash []byte, err error) {
return newTransaction(smartTx, privateKey, false)
}
// CreateTransaction creates transaction
func CreateTransaction(data, hash []byte, keyID int64) error {
tx := &model.Transaction{
Hash: hash,
Data: data[:],
Type: 1,
KeyID: keyID,
HighRate: model.TransactionRateOnBlock,
}
if err := tx.Create(); err != nil {
log.WithFields(log.Fields{"type": consts.DBError, "error": err}).Error("creating new transaction")
return err
}
return nil
}