/
manager.go
99 lines (82 loc) · 2.11 KB
/
manager.go
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/*
Copyright IBM Corp. All Rights Reserved.
SPDX-License-Identifier: Apache-2.0
*/
package transaction
import (
"crypto/rand"
"github.com/hyperledger/fabric/protoutil"
"github.com/pkg/errors"
"github.com/hyperledger-labs/fabric-smart-client/platform/fabric/driver"
"github.com/hyperledger-labs/fabric-smart-client/platform/view"
view2 "github.com/hyperledger-labs/fabric-smart-client/platform/view/view"
)
type Manager struct {
sp view.ServiceProvider
fns driver.FabricNetworkService
}
func NewManager(sp view.ServiceProvider, fns driver.FabricNetworkService) *Manager {
return &Manager{sp: sp, fns: fns}
}
func (m *Manager) ComputeTxID(id *driver.TxID) string {
return ComputeTxID(id)
}
func (m *Manager) NewEnvelope() driver.Envelope {
return NewEnvelope()
}
func (m *Manager) NewProposalResponseFromBytes(raw []byte) (driver.ProposalResponse, error) {
return NewProposalResponseFromBytes(raw)
}
func (m *Manager) NewTransaction(creator view2.Identity, nonce []byte, txid string, channel string) (driver.Transaction, error) {
ch, err := m.fns.Channel(channel)
if err != nil {
return nil, err
}
if len(nonce) == 0 {
nonce, err = getRandomNonce()
if err != nil {
return nil, err
}
}
if len(txid) == 0 {
txid = protoutil.ComputeTxID(nonce, creator)
}
return &Transaction{
sp: m.sp,
fns: m.fns,
channel: ch,
TCreator: creator,
TNonce: nonce,
TTxID: txid,
TNetwork: m.fns.Name(),
TChannel: channel,
TTransient: map[string][]byte{},
}, nil
}
func (m *Manager) NewTransactionFromBytes(channel string, raw []byte) (driver.Transaction, error) {
ch, err := m.fns.Channel(channel)
if err != nil {
return nil, err
}
tx := &Transaction{
sp: m.sp,
fns: m.fns,
channel: ch,
TChannel: channel,
TNetwork: m.fns.Name(),
TTransient: map[string][]byte{},
}
err = tx.SetFromBytes(raw)
if err != nil {
return nil, err
}
return tx, nil
}
func getRandomNonce() ([]byte, error) {
key := make([]byte, 24)
_, err := rand.Read(key)
if err != nil {
return nil, errors.Wrap(err, "error getting random bytes")
}
return key, nil
}