/
requester.go
124 lines (106 loc) · 4.3 KB
/
requester.go
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/*
Copyright IBM Corp. 2017 All Rights Reserved.
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 deliverclient
import (
"math"
"github.com/hyperledger/fabric/common/localmsp"
"github.com/hyperledger/fabric/common/util"
"github.com/hyperledger/fabric/core/comm"
"github.com/hyperledger/fabric/core/deliverservice/blocksprovider"
"github.com/hyperledger/fabric/protos/common"
"github.com/hyperledger/fabric/protos/orderer"
"github.com/hyperledger/fabric/protos/utils"
)
type blocksRequester struct {
tls bool
chainID string
client blocksprovider.BlocksDeliverer
}
func (b *blocksRequester) RequestBlocks(ledgerInfoProvider blocksprovider.LedgerInfo) error {
height, err := ledgerInfoProvider.LedgerHeight()
if err != nil {
logger.Errorf("Can't get ledger height for channel %s from committer [%s]", b.chainID, err)
return err
}
if height > 0 {
logger.Infof("Starting deliver with block [%d] for channel %s", height, b.chainID)
if err := b.seekLatestFromCommitter(height, orderer.SeekInfo_BLOCK); err != nil {
return err
}
} else {
logger.Infof("Starting deliver with oldest block for channel %s", b.chainID)
if err := b.seekOldest(orderer.SeekInfo_BLOCK); err != nil {
return err
}
}
return nil
}
func (b *blocksRequester) RequestHeaders(ledgerInfoProvider blocksprovider.LedgerInfo) error {
height, err := ledgerInfoProvider.LedgerHeight()
if err != nil {
logger.Errorf("Can't get ledger height for channel %s from committer [%s]", b.chainID, err)
return err
}
if height > 0 {
logger.Infof("Starting deliver with block [%d] for channel %s", height, b.chainID)
if err := b.seekLatestFromCommitter(height, orderer.SeekInfo_HEADER_WITH_SIG); err != nil {
return err
}
} else {
logger.Infof("Starting deliver with oldest block for channel %s", b.chainID)
if err := b.seekOldest(orderer.SeekInfo_HEADER_WITH_SIG); err != nil {
return err
}
}
return nil
}
func (b *blocksRequester) getTLSCertHash() []byte {
if b.tls {
return util.ComputeSHA256(comm.GetCredentialSupport().GetClientCertificate().Certificate[0])
}
return nil
}
func (b *blocksRequester) seekOldest(contentType orderer.SeekInfo_SeekContentType) error {
seekInfo := &orderer.SeekInfo{
Start: &orderer.SeekPosition{Type: &orderer.SeekPosition_Oldest{Oldest: &orderer.SeekOldest{}}},
Stop: &orderer.SeekPosition{Type: &orderer.SeekPosition_Specified{Specified: &orderer.SeekSpecified{Number: math.MaxUint64}}},
Behavior: orderer.SeekInfo_BLOCK_UNTIL_READY,
ContentType: contentType,
}
//TODO- epoch and msgVersion may need to be obtained for nowfollowing usage in orderer/configupdate/configupdate.go
msgVersion := int32(0)
epoch := uint64(0)
tlsCertHash := b.getTLSCertHash()
env, err := utils.CreateSignedEnvelopeWithTLSBinding(common.HeaderType_DELIVER_SEEK_INFO, b.chainID, localmsp.NewSigner(), seekInfo, msgVersion, epoch, tlsCertHash)
if err != nil {
return err
}
return b.client.Send(env)
}
func (b *blocksRequester) seekLatestFromCommitter(height uint64, contentType orderer.SeekInfo_SeekContentType) error {
seekInfo := &orderer.SeekInfo{
Start: &orderer.SeekPosition{Type: &orderer.SeekPosition_Specified{Specified: &orderer.SeekSpecified{Number: height}}},
Stop: &orderer.SeekPosition{Type: &orderer.SeekPosition_Specified{Specified: &orderer.SeekSpecified{Number: math.MaxUint64}}},
Behavior: orderer.SeekInfo_BLOCK_UNTIL_READY,
ContentType: contentType,
}
//TODO- epoch and msgVersion may need to be obtained for nowfollowing usage in orderer/configupdate/configupdate.go
msgVersion := int32(0)
epoch := uint64(0)
tlsCertHash := b.getTLSCertHash()
env, err := utils.CreateSignedEnvelopeWithTLSBinding(common.HeaderType_DELIVER_SEEK_INFO, b.chainID, localmsp.NewSigner(), seekInfo, msgVersion, epoch, tlsCertHash)
if err != nil {
return err
}
return b.client.Send(env)
}