You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
280 lines
8.1 KiB
280 lines
8.1 KiB
package consensus
|
|
|
|
import (
|
|
"bytes"
|
|
"encoding/binary"
|
|
"harmony-benchmark/p2p"
|
|
"strconv"
|
|
"regexp"
|
|
"encoding/gob"
|
|
"harmony-benchmark/blockchain"
|
|
)
|
|
|
|
// Validator's consensus message dispatcher
|
|
func (consensus *Consensus) ProcessMessageValidator(message []byte) {
|
|
msgType, err := GetConsensusMessageType(message)
|
|
if err != nil {
|
|
consensus.Log.Error("Failed to get consensus message type", "err", err, "consensus", consensus)
|
|
}
|
|
|
|
payload, err := GetConsensusMessagePayload(message)
|
|
if err != nil {
|
|
consensus.Log.Error("Failed to get consensus message payload", "err", err, "consensus", consensus)
|
|
}
|
|
|
|
switch msgType {
|
|
case ANNOUNCE:
|
|
consensus.processAnnounceMessage(payload)
|
|
case COMMIT:
|
|
consensus.Log.Error("Unexpected message type", "msgType", msgType, "consensus", consensus)
|
|
case CHALLENGE:
|
|
consensus.processChallengeMessage(payload)
|
|
case RESPONSE:
|
|
consensus.Log.Error("Unexpected message type", "msgType", msgType, "consensus", consensus)
|
|
default:
|
|
consensus.Log.Error("Unexpected message type", "msgType", msgType, "consensus", consensus)
|
|
}
|
|
}
|
|
|
|
func (consensus *Consensus) processAnnounceMessage(payload []byte) {
|
|
//#### Read payload data
|
|
offset := 0
|
|
// 4 byte consensus id
|
|
consensusId := binary.BigEndian.Uint32(payload[offset : offset+4])
|
|
offset += 4
|
|
|
|
// 32 byte block hash
|
|
blockHash := payload[offset : offset+32]
|
|
offset += 32
|
|
|
|
// 2 byte leader id
|
|
leaderId := binary.BigEndian.Uint16(payload[offset : offset+2])
|
|
offset += 2
|
|
|
|
// n byte of block header
|
|
n := len(payload) - offset - 4 - 64 // the numbers means 4 byte payload and 64 signature
|
|
blockHeader := payload[offset : offset+n]
|
|
offset += n
|
|
|
|
// 4 byte of payload size (block header)
|
|
blockHeaderSize := payload[offset : offset+4]
|
|
offset += 4
|
|
|
|
// 64 byte of signature on previous data
|
|
signature := payload[offset : offset+64]
|
|
offset += 64
|
|
//#### END: Read payload data
|
|
|
|
// TODO: make use of the data. This is just to avoid the unused variable warning
|
|
_ = consensusId
|
|
|
|
_ = leaderId
|
|
_ = blockHeader
|
|
_ = blockHeaderSize
|
|
_ = signature
|
|
|
|
copy(consensus.blockHash[:], blockHash[:])
|
|
|
|
// Verify block data
|
|
// check consensus Id
|
|
if consensusId != consensus.consensusId {
|
|
consensus.Log.Debug("[ERROR] Received message with wrong consensus Id", "myConsensusId", consensus.consensusId, "theirConsensusId", consensusId)
|
|
return
|
|
}
|
|
|
|
// check leader Id
|
|
leaderPrivKey := consensus.leader.Ip + consensus.leader.Port
|
|
reg, _ := regexp.Compile("[^0-9]+")
|
|
socketId := reg.ReplaceAllString(leaderPrivKey, "")
|
|
value, _ := strconv.Atoi(socketId)
|
|
if leaderId != uint16(value) {
|
|
consensus.Log.Debug("[ERROR] Received message from wrong leader", "myLeaderId", consensus.consensusId, "receivedLeaderId", consensusId)
|
|
return
|
|
}
|
|
|
|
// check block header is valid
|
|
txDecoder := gob.NewDecoder(bytes.NewReader(blockHeader))
|
|
var blockHeaderObj blockchain.Block // TODO: separate header from block. Right now, this blockHeader data is actually the whole block
|
|
err := txDecoder.Decode(&blockHeaderObj)
|
|
if err != nil {
|
|
consensus.Log.Debug("[ERROR] Unparseable block header data")
|
|
return
|
|
}
|
|
consensus.blockHeader = blockHeader
|
|
|
|
// check block hash
|
|
if bytes.Compare(blockHash[:], blockHeaderObj.HashTransactions()[:]) != 0 || bytes.Compare(blockHeaderObj.Hash[:], blockHeaderObj.HashTransactions()[:]) != 0 {
|
|
consensus.Log.Debug("[ERROR] Block hash doesn't match")
|
|
return
|
|
}
|
|
|
|
// check block data (transactions
|
|
if !consensus.BlockVerifier(&blockHeaderObj) {
|
|
consensus.Log.Debug("[ERROR] Block content is not verified successfully")
|
|
return
|
|
}
|
|
|
|
// TODO: return the signature(commit) to leader
|
|
// For now, simply return the private key of this node.
|
|
msgToSend := consensus.constructCommitMessage()
|
|
p2p.SendMessage(consensus.leader, msgToSend)
|
|
|
|
// Set state to COMMIT_DONE
|
|
consensus.state = COMMIT_DONE
|
|
}
|
|
|
|
// Construct the commit message to send to leader (assumption the consensus data is already verified)
|
|
func (consensus Consensus) constructCommitMessage() []byte {
|
|
buffer := bytes.NewBuffer([]byte{})
|
|
|
|
// 4 byte consensus id
|
|
fourBytes := make([]byte, 4)
|
|
binary.BigEndian.PutUint32(fourBytes, consensus.consensusId)
|
|
buffer.Write(fourBytes)
|
|
|
|
// 32 byte block hash
|
|
buffer.Write(consensus.blockHash[:])
|
|
|
|
// 2 byte validator id
|
|
twoBytes := make([]byte, 2)
|
|
binary.BigEndian.PutUint16(twoBytes, consensus.nodeId)
|
|
buffer.Write(twoBytes)
|
|
|
|
// 33 byte of commit
|
|
commit := getCommitMessage()
|
|
buffer.Write(commit)
|
|
|
|
// 64 byte of signature on previous data
|
|
signature := signMessage(buffer.Bytes())
|
|
buffer.Write(signature)
|
|
|
|
return consensus.ConstructConsensusMessage(COMMIT, buffer.Bytes())
|
|
}
|
|
|
|
func getCommitMessage() []byte {
|
|
// TODO: use real cosi signature
|
|
return make([]byte, 33)
|
|
}
|
|
|
|
func (consensus *Consensus) processChallengeMessage(payload []byte) {
|
|
//#### Read payload data
|
|
offset := 0
|
|
// 4 byte consensus id
|
|
consensusId := binary.BigEndian.Uint32(payload[offset : offset+4])
|
|
offset += 4
|
|
|
|
// 32 byte block hash
|
|
blockHash := payload[offset : offset+32]
|
|
offset += 32
|
|
|
|
// 2 byte leader id
|
|
leaderId := binary.BigEndian.Uint16(payload[offset : offset+2])
|
|
offset += 2
|
|
|
|
// 33 byte of aggregated commit
|
|
aggreCommit := payload[offset : offset+33]
|
|
offset += 33
|
|
|
|
// 33 byte of aggregated key
|
|
aggreKey := payload[offset : offset+33]
|
|
offset += 33
|
|
|
|
// 32 byte of aggregated key
|
|
challenge := payload[offset : offset+32]
|
|
offset += 32
|
|
|
|
// 64 byte of signature on previous data
|
|
signature := payload[offset : offset+64]
|
|
offset += 64
|
|
//#### END: Read payload data
|
|
|
|
// TODO: make use of the data. This is just to avoid the unused variable warning
|
|
_ = consensusId
|
|
_ = blockHash
|
|
_ = leaderId
|
|
_ = aggreCommit
|
|
_ = aggreKey
|
|
_ = challenge
|
|
_ = signature
|
|
|
|
// erify block data and the aggregated signatures
|
|
// check consensus Id
|
|
if consensusId != consensus.consensusId {
|
|
consensus.Log.Debug("[ERROR] Received message with wrong consensus Id", "myConsensusId", consensus.consensusId, "theirConsensusId", consensusId)
|
|
return
|
|
}
|
|
|
|
// check leader Id
|
|
leaderPrivKey := consensus.leader.Ip + consensus.leader.Port
|
|
reg, _ := regexp.Compile("[^0-9]+")
|
|
socketId := reg.ReplaceAllString(leaderPrivKey, "")
|
|
value, _ := strconv.Atoi(socketId)
|
|
if leaderId != uint16(value) {
|
|
consensus.Log.Debug("[ERROR] Received message from wrong leader", "myLeaderId", consensus.consensusId, "receivedLeaderId", consensusId)
|
|
return
|
|
}
|
|
|
|
// check block hash
|
|
if bytes.Compare(blockHash[:], consensus.blockHash[:]) != 0 {
|
|
consensus.Log.Debug("[ERROR] Block hash doesn't match")
|
|
return
|
|
}
|
|
|
|
// TODO: verify aggregated commits with real schnor cosign verification
|
|
|
|
// TODO: return the signature(response) to leader
|
|
// For now, simply return the private key of this node.
|
|
msgToSend := consensus.constructResponseMessage()
|
|
p2p.SendMessage(consensus.leader, msgToSend)
|
|
|
|
// Set state to RESPONSE_DONE
|
|
consensus.state = RESPONSE_DONE
|
|
consensus.consensusId++
|
|
|
|
|
|
// TODO: think about when validators know about the consensus is reached.
|
|
// For now, the blockchain is updated right here.
|
|
|
|
// TODO: reconstruct the whole block from header and transactions
|
|
// For now, we used the stored whole block in consensus.blockHeader
|
|
txDecoder := gob.NewDecoder(bytes.NewReader(consensus.blockHeader))
|
|
var blockHeaderObj blockchain.Block
|
|
err := txDecoder.Decode(&blockHeaderObj)
|
|
if err != nil {
|
|
consensus.Log.Debug("failed to construct the new block after consensus")
|
|
}
|
|
consensus.OnConsensusDone(&blockHeaderObj)
|
|
}
|
|
|
|
// Construct the response message to send to leader (assumption the consensus data is already verified)
|
|
func (consensus Consensus) constructResponseMessage() []byte {
|
|
buffer := bytes.NewBuffer([]byte{})
|
|
|
|
// 4 byte consensus id
|
|
fourBytes := make([]byte, 4)
|
|
binary.BigEndian.PutUint32(fourBytes, consensus.consensusId)
|
|
buffer.Write(fourBytes)
|
|
|
|
// 32 byte block hash
|
|
buffer.Write(consensus.blockHash[:32])
|
|
|
|
// 2 byte validator id
|
|
twoBytes := make([]byte, 2)
|
|
binary.BigEndian.PutUint16(twoBytes, consensus.nodeId)
|
|
buffer.Write(twoBytes)
|
|
|
|
// 32 byte of response
|
|
response := getResponseMessage()
|
|
buffer.Write(response)
|
|
|
|
// 64 byte of signature on previous data
|
|
signature := signMessage(buffer.Bytes())
|
|
buffer.Write(signature)
|
|
|
|
return consensus.ConstructConsensusMessage(RESPONSE, buffer.Bytes())
|
|
}
|
|
|
|
// TODO: fill in this function
|
|
func getResponseMessage() []byte {
|
|
return make([]byte, 32)
|
|
}
|
|
|