/
configblock.go
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/
configblock.go
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/*
Copyright IBM Corp All Rights Reserved.
SPDX-License-Identifier: Apache-2.0
*/
package nwo
import (
"io/ioutil"
"os"
"path/filepath"
. "github.com/onsi/gomega"
"github.com/onsi/gomega/gbytes"
"github.com/onsi/gomega/gexec"
"github.com/golang/protobuf/proto"
"github.com/hyperledger/fabric/common/tools/configtxlator/update"
"github.com/hyperledger/fabric/integration/nwo/commands"
"github.com/hyperledger/fabric/protos/common"
"github.com/hyperledger/fabric/protos/utils"
)
// GetConfigBlock retrieves the current config block for a channel and
// unmarshals it.
func GetConfigBlock(n *Network, peer *Peer, orderer *Orderer, channel string) *common.Config {
tempDir, err := ioutil.TempDir("", "getConfigBlock")
Expect(err).NotTo(HaveOccurred())
defer os.RemoveAll(tempDir)
// fetch the config block
output := filepath.Join(tempDir, "config_block.pb")
sess, err := n.PeerAdminSession(peer, commands.ChannelFetch{
ChannelID: channel,
Block: "config",
Orderer: n.OrdererAddress(orderer, ListenPort),
OutputFile: output,
})
Expect(err).NotTo(HaveOccurred())
Eventually(sess, n.EventuallyTimeout).Should(gexec.Exit(0))
Expect(sess.Err).To(gbytes.Say("Received block: "))
// unmarshal the config block bytes
configBlock := UnmarshalBlockFromFile(output)
// unmarshal the envelope bytes
envelope, err := utils.GetEnvelopeFromBlock(configBlock.Data.Data[0])
Expect(err).NotTo(HaveOccurred())
// unmarshal the payload bytes
payload, err := utils.GetPayload(envelope)
Expect(err).NotTo(HaveOccurred())
// unmarshal the config envelope bytes
configEnv := &common.ConfigEnvelope{}
err = proto.Unmarshal(payload.Data, configEnv)
Expect(err).NotTo(HaveOccurred())
// clone the config
return configEnv.Config
}
// UpdateConfig computes, signs, and submits a configuration update and waits
// for the update to complete.
func UpdateConfig(n *Network, orderer *Orderer, channel string, current, updated *common.Config, submitter *Peer, additionalSigners ...*Peer) {
tempDir, err := ioutil.TempDir("", "updateConfig")
Expect(err).NotTo(HaveOccurred())
defer os.RemoveAll(tempDir)
// compute update
configUpdate, err := update.Compute(current, updated)
Expect(err).NotTo(HaveOccurred())
configUpdate.ChannelId = channel
signedEnvelope, err := utils.CreateSignedEnvelope(
common.HeaderType_CONFIG_UPDATE,
channel,
nil, // local signer
&common.ConfigUpdateEnvelope{ConfigUpdate: utils.MarshalOrPanic(configUpdate)},
0, // message version
0, // epoch
)
Expect(err).NotTo(HaveOccurred())
Expect(signedEnvelope).NotTo(BeNil())
updateFile := filepath.Join(tempDir, "update.pb")
err = ioutil.WriteFile(updateFile, utils.MarshalOrPanic(signedEnvelope), 0600)
Expect(err).NotTo(HaveOccurred())
for _, signer := range additionalSigners {
sess, err := n.PeerAdminSession(signer, commands.SignConfigTx{File: updateFile})
Expect(err).NotTo(HaveOccurred())
Eventually(sess, n.EventuallyTimeout).Should(gexec.Exit(0))
}
// get current configuration block number
currentBlockNumber := CurrentConfigBlockNumber(n, submitter, orderer, channel)
sess, err := n.PeerAdminSession(submitter, commands.ChannelUpdate{
ChannelID: channel,
Orderer: n.OrdererAddress(orderer, ListenPort),
File: updateFile,
})
Expect(err).NotTo(HaveOccurred())
Eventually(sess, n.EventuallyTimeout).Should(gexec.Exit(0))
Expect(sess.Err).To(gbytes.Say("Successfully submitted channel update"))
// wait for the block to be committed
ccb := func() uint64 { return CurrentConfigBlockNumber(n, submitter, orderer, channel) }
Eventually(ccb, n.EventuallyTimeout).Should(BeNumerically(">", currentBlockNumber))
}
// CurrentConfigBlockNumber retrieves the block number from the header of the
// current config block. This can be used to detect whena configuration change
// has completed.
func CurrentConfigBlockNumber(n *Network, peer *Peer, orderer *Orderer, channel string) uint64 {
tempDir, err := ioutil.TempDir("", "currentConfigBlock")
Expect(err).NotTo(HaveOccurred())
defer os.RemoveAll(tempDir)
// fetch the config block
output := filepath.Join(tempDir, "config_block.pb")
sess, err := n.PeerAdminSession(peer, commands.ChannelFetch{
ChannelID: channel,
Block: "config",
Orderer: n.OrdererAddress(orderer, ListenPort),
OutputFile: output,
})
Expect(err).NotTo(HaveOccurred())
Eventually(sess, n.EventuallyTimeout).Should(gexec.Exit(0))
Expect(sess.Err).To(gbytes.Say("Received block: "))
// unmarshal the config block bytes
configBlock := UnmarshalBlockFromFile(output)
return configBlock.Header.Number
}
// UnmarshalBlockFromFile unmarshals a proto encoded block from a file.
func UnmarshalBlockFromFile(blockFile string) *common.Block {
blockBytes, err := ioutil.ReadFile(blockFile)
Expect(err).NotTo(HaveOccurred())
block, err := utils.UnmarshalBlock(blockBytes)
Expect(err).NotTo(HaveOccurred())
return block
}