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ledger.go
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ledger.go
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// Copyright © 2023 Kaleido, Inc.
//
// SPDX-License-Identifier: Apache-2.0
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
package client
import (
"sync"
"github.com/hyperledger/fabric-protos-go/common"
"github.com/hyperledger/fabric-sdk-go/pkg/client/ledger"
"github.com/hyperledger/fabric-sdk-go/pkg/common/providers/context"
"github.com/hyperledger/fabric-sdk-go/pkg/common/providers/core"
"github.com/hyperledger/fabric-sdk-go/pkg/common/providers/fab"
"github.com/hyperledger/fabric-sdk-go/pkg/fabsdk"
"github.com/hyperledger/firefly-fabconnect/internal/errors"
"github.com/hyperledger/firefly-fabconnect/internal/fabric/utils"
)
// defined to allow mocking in tests
type ledgerClientCreator func(channelProvider context.ChannelProvider, opts ...ledger.ClientOption) (*ledger.Client, error)
type ledgerClientWrapper struct {
// ledger client per channel per signer
ledgerClients map[string]map[string]*ledger.Client
sdk *fabsdk.FabricSDK
idClient IdentityClient
ledgerClientCreator ledgerClientCreator
mu sync.Mutex
}
func newLedgerClient(_ core.ConfigProvider, sdk *fabsdk.FabricSDK, idClient IdentityClient) *ledgerClientWrapper {
w := &ledgerClientWrapper{
sdk: sdk,
idClient: idClient,
ledgerClients: make(map[string]map[string]*ledger.Client),
ledgerClientCreator: createLedgerClient,
}
idClient.AddSignerUpdateListener(w)
return w
}
func (l *ledgerClientWrapper) queryChainInfo(channelID, signer string) (*fab.BlockchainInfoResponse, error) {
client, err := l.getLedgerClient(channelID, signer)
if err != nil {
return nil, errors.Errorf("Failed to get channel client. %s", err)
}
result, err := client.QueryInfo()
if err != nil {
return nil, err
}
return result, nil
}
func (l *ledgerClientWrapper) queryBlock(channelID string, signer string, blockNumber uint64, blockhash []byte) (*utils.RawBlock, *utils.Block, error) {
client, err := l.getLedgerClient(channelID, signer)
if err != nil {
return nil, nil, errors.Errorf("Failed to get channel client. %s", err)
}
var result *common.Block
var err1 error
if blockhash == nil {
result, err1 = client.QueryBlock(blockNumber)
} else {
result, err1 = client.QueryBlockByHash(blockhash)
}
if err1 != nil {
return nil, nil, err1
}
rawblock, block, err := utils.DecodeBlock(result)
return rawblock, block, err
}
func (l *ledgerClientWrapper) queryBlockByTxID(channelID string, signer string, txID string) (*utils.RawBlock, *utils.Block, error) {
client, err := l.getLedgerClient(channelID, signer)
if err != nil {
return nil, nil, errors.Errorf("Failed to get channel client. %s", err)
}
result, err := client.QueryBlockByTxID(fab.TransactionID(txID))
if err != nil {
return nil, nil, err
}
rawblock, block, err := utils.DecodeBlock(result)
return rawblock, block, err
}
func (l *ledgerClientWrapper) queryTransaction(channelID, signer, txID string) (map[string]interface{}, error) {
client, err := l.getLedgerClient(channelID, signer)
if err != nil {
return nil, errors.Errorf("Failed to get channel client. %s", err)
}
fabTxID := fab.TransactionID(txID)
result, err := client.QueryTransaction(fabTxID)
if err != nil {
return nil, err
}
bloc := &utils.RawBlock{}
envelope, tx, err := bloc.DecodeBlockDataEnvelope(result.TransactionEnvelope)
if err != nil {
return nil, err
}
ret := make(map[string]interface{})
ret["transaction"] = tx
ret["raw"] = envelope
return ret, nil
}
func (l *ledgerClientWrapper) getLedgerClient(channelID, signer string) (ledgerClient *ledger.Client, err error) {
l.mu.Lock()
defer l.mu.Unlock()
ledgerClientsForSigner := l.ledgerClients[signer]
if ledgerClientsForSigner == nil {
ledgerClientsForSigner = make(map[string]*ledger.Client)
l.ledgerClients[signer] = ledgerClientsForSigner
}
ledgerClient = ledgerClientsForSigner[channelID]
if ledgerClient == nil {
channelProvider := l.sdk.ChannelContext(channelID, fabsdk.WithOrg(l.idClient.GetClientOrg()), fabsdk.WithUser(signer))
ledgerClient, err = l.ledgerClientCreator(channelProvider)
if err != nil {
return nil, err
}
ledgerClientsForSigner[channelID] = ledgerClient
}
return ledgerClient, nil
}
func (l *ledgerClientWrapper) SignerUpdated(signer string) {
l.mu.Lock()
l.ledgerClients[signer] = nil
l.mu.Unlock()
}
func createLedgerClient(channelProvider context.ChannelProvider, opts ...ledger.ClientOption) (*ledger.Client, error) {
return ledger.New(channelProvider, opts...)
}