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65 lines
2.1 KiB
65 lines
2.1 KiB
package consensus
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import (
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"bytes"
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"encoding/binary"
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"github.com/dedis/kyber"
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"github.com/simple-rules/harmony-benchmark/crypto"
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proto_consensus "github.com/simple-rules/harmony-benchmark/proto/consensus"
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)
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// Construct the commit message to send to leader (assumption the consensus data is already verified)
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func (consensus *Consensus) constructCommitMessage(msgType proto_consensus.MessageType) (secret kyber.Scalar, commitMsg []byte) {
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buffer := bytes.NewBuffer([]byte{})
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// 4 byte consensus id
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fourBytes := make([]byte, 4)
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binary.BigEndian.PutUint32(fourBytes, consensus.consensusID)
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buffer.Write(fourBytes)
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// 32 byte block hash
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buffer.Write(consensus.blockHash[:])
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// 2 byte validator id
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twoBytes := make([]byte, 2)
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binary.BigEndian.PutUint16(twoBytes, consensus.nodeId)
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buffer.Write(twoBytes)
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// 32 byte of commit (TODO: figure out why it's different than Zilliqa's ECPoint which takes 33 bytes: https://crypto.stackexchange.com/questions/51703/how-to-convert-from-curve25519-33-byte-to-32-byte-representation)
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secret, commitment := crypto.Commit(crypto.Ed25519Curve)
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commitment.MarshalTo(buffer)
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// 64 byte of signature on previous data
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signature := consensus.signMessage(buffer.Bytes())
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buffer.Write(signature)
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return secret, proto_consensus.ConstructConsensusMessage(msgType, buffer.Bytes())
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}
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// Construct the response message to send to leader (assumption the consensus data is already verified)
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func (consensus *Consensus) constructResponseMessage(msgType proto_consensus.MessageType, response kyber.Scalar) []byte {
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buffer := bytes.NewBuffer([]byte{})
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// 4 byte consensus id
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fourBytes := make([]byte, 4)
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binary.BigEndian.PutUint32(fourBytes, consensus.consensusID)
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buffer.Write(fourBytes)
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// 32 byte block hash
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buffer.Write(consensus.blockHash[:32])
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// 2 byte validator id
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twoBytes := make([]byte, 2)
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binary.BigEndian.PutUint16(twoBytes, consensus.nodeId)
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buffer.Write(twoBytes)
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// 32 byte of response
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response.MarshalTo(buffer)
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// 64 byte of signature on previous data
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signature := consensus.signMessage(buffer.Bytes())
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buffer.Write(signature)
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return proto_consensus.ConstructConsensusMessage(msgType, buffer.Bytes())
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}
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