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1317 lines
45 KiB
1317 lines
45 KiB
package consensus
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import (
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"bytes"
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"encoding/binary"
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"encoding/hex"
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"time"
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"github.com/ethereum/go-ethereum/common"
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"github.com/ethereum/go-ethereum/rlp"
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protobuf "github.com/golang/protobuf/proto"
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"github.com/harmony-one/bls/ffi/go/bls"
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"github.com/harmony-one/harmony/api/proto"
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msg_pb "github.com/harmony-one/harmony/api/proto/message"
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"github.com/harmony-one/harmony/core"
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"github.com/harmony-one/harmony/core/types"
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vrf_bls "github.com/harmony-one/harmony/crypto/vrf/bls"
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"github.com/harmony-one/harmony/internal/ctxerror"
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"github.com/harmony-one/harmony/internal/utils"
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"github.com/harmony-one/harmony/p2p"
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"github.com/harmony-one/harmony/p2p/host"
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"github.com/harmony-one/vdf/src/vdf_go"
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)
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// handleMessageUpdate will update the consensus state according to received message
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func (consensus *Consensus) handleMessageUpdate(payload []byte) {
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if len(payload) == 0 {
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return
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}
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msg := &msg_pb.Message{}
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err := protobuf.Unmarshal(payload, msg)
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if err != nil {
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utils.Logger().Error().Err(err).Interface("consensus", consensus).Msg("Failed to unmarshal message payload.")
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return
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}
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// when node is in ViewChanging mode, it still accepts normal message into PbftLog to avoid possible trap forever
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// but drop PREPARE and COMMIT which are message types for leader
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if consensus.mode.Mode() == ViewChanging && (msg.Type == msg_pb.MessageType_PREPARE || msg.Type == msg_pb.MessageType_COMMIT) {
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return
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}
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// listening mode will skip consensus process
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if consensus.mode.Mode() == Listening {
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return
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}
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if msg.Type == msg_pb.MessageType_VIEWCHANGE || msg.Type == msg_pb.MessageType_NEWVIEW {
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if msg.GetViewchange() != nil && msg.GetViewchange().ShardId != consensus.ShardID {
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consensus.getLogger().Warn().
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Uint32("myShardId", consensus.ShardID).
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Uint32("receivedShardId", msg.GetViewchange().ShardId).
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Msg("Received view change message from different shard")
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return
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}
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} else {
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if msg.GetConsensus() != nil && msg.GetConsensus().ShardId != consensus.ShardID {
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consensus.getLogger().Warn().
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Uint32("myShardId", consensus.ShardID).
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Uint32("receivedShardId", msg.GetConsensus().ShardId).
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Msg("Received consensus message from different shard")
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return
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}
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}
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switch msg.Type {
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case msg_pb.MessageType_ANNOUNCE:
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consensus.onAnnounce(msg)
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case msg_pb.MessageType_PREPARE:
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consensus.onPrepare(msg)
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case msg_pb.MessageType_PREPARED:
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consensus.onPrepared(msg)
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case msg_pb.MessageType_COMMIT:
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consensus.onCommit(msg)
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case msg_pb.MessageType_COMMITTED:
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consensus.onCommitted(msg)
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case msg_pb.MessageType_VIEWCHANGE:
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consensus.onViewChange(msg)
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case msg_pb.MessageType_NEWVIEW:
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consensus.onNewView(msg)
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}
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}
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// TODO: move to consensus_leader.go later
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func (consensus *Consensus) announce(block *types.Block) {
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blockHash := block.Hash()
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copy(consensus.blockHash[:], blockHash[:])
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// prepare message and broadcast to validators
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encodedBlock, err := rlp.EncodeToBytes(block)
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if err != nil {
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consensus.getLogger().Debug().Msg("[Announce] Failed encoding block")
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return
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}
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encodedBlockHeader, err := rlp.EncodeToBytes(block.Header())
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if err != nil {
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consensus.getLogger().Debug().Msg("[Announce] Failed encoding block header")
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return
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}
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consensus.block = encodedBlock
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consensus.blockHeader = encodedBlockHeader
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msgToSend := consensus.constructAnnounceMessage()
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// save announce message to PbftLog
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msgPayload, _ := proto.GetConsensusMessagePayload(msgToSend)
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msg := &msg_pb.Message{}
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_ = protobuf.Unmarshal(msgPayload, msg)
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pbftMsg, err := ParsePbftMessage(msg)
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if err != nil {
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consensus.getLogger().Warn().Err(err).Msg("[Announce] Unable to parse pbft message")
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return
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}
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consensus.PbftLog.AddMessage(pbftMsg)
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consensus.getLogger().Debug().
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Str("MsgBlockHash", pbftMsg.BlockHash.Hex()).
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Uint64("MsgViewID", pbftMsg.ViewID).
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Uint64("MsgBlockNum", pbftMsg.BlockNum).
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Msg("[Announce] Added Announce message in pbftLog")
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consensus.PbftLog.AddBlock(block)
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// Leader sign the block hash itself
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consensus.prepareSigs[consensus.PubKey.SerializeToHexStr()] = consensus.priKey.SignHash(consensus.blockHash[:])
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if err := consensus.prepareBitmap.SetKey(consensus.PubKey, true); err != nil {
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consensus.getLogger().Warn().Err(err).Msg("[Announce] Leader prepareBitmap SetKey failed")
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return
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}
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// Construct broadcast p2p message
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if err := consensus.msgSender.SendWithRetry(consensus.blockNum, msg_pb.MessageType_ANNOUNCE, []p2p.GroupID{p2p.NewGroupIDByShardID(p2p.ShardID(consensus.ShardID))}, host.ConstructP2pMessage(byte(17), msgToSend)); err != nil {
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consensus.getLogger().Warn().
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Str("groupID", string(p2p.NewGroupIDByShardID(p2p.ShardID(consensus.ShardID)))).
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Msg("[Announce] Cannot send announce message")
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} else {
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consensus.getLogger().Info().
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Str("blockHash", block.Hash().Hex()).
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Uint64("blockNum", block.NumberU64()).
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Msg("[Announce] Sent Announce Message!!")
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}
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consensus.getLogger().Debug().
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Str("From", consensus.phase.String()).
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Str("To", Prepare.String()).
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Msg("[Announce] Switching phase")
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consensus.switchPhase(Prepare, true)
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}
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func (consensus *Consensus) onAnnounce(msg *msg_pb.Message) {
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consensus.getLogger().Debug().Msg("[OnAnnounce] Receive announce message")
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if consensus.IsLeader() && consensus.mode.Mode() == Normal {
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return
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}
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senderKey, err := consensus.verifySenderKey(msg)
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if err != nil {
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consensus.getLogger().Error().Err(err).Msg("[OnAnnounce] VerifySenderKey failed")
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return
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}
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if !senderKey.IsEqual(consensus.LeaderPubKey) && consensus.mode.Mode() == Normal && !consensus.ignoreViewIDCheck {
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consensus.getLogger().Warn().
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Str("senderKey", senderKey.SerializeToHexStr()).
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Str("leaderKey", consensus.LeaderPubKey.SerializeToHexStr()).
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Msg("[OnAnnounce] SenderKey does not match leader PubKey")
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return
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}
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if err = verifyMessageSig(senderKey, msg); err != nil {
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consensus.getLogger().Error().Err(err).Msg("[OnAnnounce] Failed to verify leader signature")
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return
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}
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recvMsg, err := ParsePbftMessage(msg)
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if err != nil {
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consensus.getLogger().Error().
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Err(err).
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Uint64("MsgBlockNum", recvMsg.BlockNum).
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Msg("[OnAnnounce] Unparseable leader message")
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return
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}
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// verify validity of block header object
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blockHeader := recvMsg.Payload
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var headerObj types.Header
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err = rlp.DecodeBytes(blockHeader, &headerObj)
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if err != nil {
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consensus.getLogger().Warn().
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Err(err).
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Uint64("MsgBlockNum", recvMsg.BlockNum).
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Msg("[OnAnnounce] Unparseable block header data")
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return
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}
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if recvMsg.BlockNum < consensus.blockNum || recvMsg.BlockNum != headerObj.Number.Uint64() {
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consensus.getLogger().Debug().
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Uint64("MsgBlockNum", recvMsg.BlockNum).
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Uint64("blockNum", consensus.blockNum).
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Uint64("hdrBlockNum", headerObj.Number.Uint64()).
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Msg("[OnAnnounce] BlockNum does not match")
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return
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}
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if consensus.mode.Mode() == Normal {
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if err = consensus.VerifyHeader(consensus.ChainReader, &headerObj, true); err != nil {
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consensus.getLogger().Warn().
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Err(err).
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Str("inChain", consensus.ChainReader.CurrentHeader().Number.String()).
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Str("MsgBlockNum", headerObj.Number.String()).
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Msg("[OnAnnounce] Block content is not verified successfully")
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return
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}
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//VRF/VDF is only generated in the beach chain
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if consensus.NeedsRandomNumberGeneration(headerObj.Epoch) {
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//validate the VRF with proof if a non zero VRF is found in header
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if len(headerObj.Vrf) > 0 {
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if !consensus.ValidateVrfAndProof(headerObj) {
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return
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}
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}
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//validate the VDF with proof if a non zero VDF is found in header
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if len(headerObj.Vdf) > 0 {
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if !consensus.ValidateVdfAndProof(headerObj) {
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return
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}
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}
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}
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}
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logMsgs := consensus.PbftLog.GetMessagesByTypeSeqView(msg_pb.MessageType_ANNOUNCE, recvMsg.BlockNum, recvMsg.ViewID)
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if len(logMsgs) > 0 {
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if logMsgs[0].BlockHash != recvMsg.BlockHash {
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consensus.getLogger().Debug().
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Str("leaderKey", consensus.LeaderPubKey.SerializeToHexStr()).
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Msg("[OnAnnounce] Leader is malicious")
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consensus.startViewChange(consensus.viewID + 1)
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}
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consensus.getLogger().Debug().
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Str("leaderKey", consensus.LeaderPubKey.SerializeToHexStr()).
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Msg("[OnAnnounce] Announce message received again")
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//return
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}
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consensus.getLogger().Debug().
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Uint64("MsgViewID", recvMsg.ViewID).
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Uint64("MsgBlockNum", recvMsg.BlockNum).
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Msg("[OnAnnounce] Announce message Added")
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consensus.PbftLog.AddMessage(recvMsg)
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consensus.mutex.Lock()
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defer consensus.mutex.Unlock()
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consensus.blockHash = recvMsg.BlockHash
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// we have already added message and block, skip check viewID and send prepare message if is in ViewChanging mode
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if consensus.mode.Mode() == ViewChanging {
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consensus.getLogger().Debug().Msg("[OnAnnounce] Still in ViewChanging Mode, Exiting !!")
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return
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}
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if consensus.checkViewID(recvMsg) != nil {
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if consensus.mode.Mode() == Normal {
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consensus.getLogger().Debug().
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Uint64("MsgViewID", recvMsg.ViewID).
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Uint64("MsgBlockNum", recvMsg.BlockNum).
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Msg("[OnAnnounce] ViewID check failed")
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}
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return
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}
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consensus.prepare()
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return
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}
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// tryPrepare will try to send prepare message
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func (consensus *Consensus) prepare() {
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// Construct and send prepare message
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msgToSend := consensus.constructPrepareMessage()
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// TODO: this will not return immediatey, may block
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if err := consensus.msgSender.SendWithoutRetry([]p2p.GroupID{p2p.NewGroupIDByShardID(p2p.ShardID(consensus.ShardID))}, host.ConstructP2pMessage(byte(17), msgToSend)); err != nil {
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consensus.getLogger().Warn().Err(err).Msg("[OnAnnounce] Cannot send prepare message")
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} else {
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consensus.getLogger().Info().
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Str("blockHash", hex.EncodeToString(consensus.blockHash[:])).
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Msg("[OnAnnounce] Sent Prepare Message!!")
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}
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consensus.getLogger().Debug().
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Str("From", consensus.phase.String()).
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Str("To", Prepare.String()).
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Msg("[Announce] Switching Phase")
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consensus.switchPhase(Prepare, true)
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}
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// TODO: move to consensus_leader.go later
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func (consensus *Consensus) onPrepare(msg *msg_pb.Message) {
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if !consensus.IsLeader() {
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return
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}
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senderKey, err := consensus.verifySenderKey(msg)
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if err != nil {
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consensus.getLogger().Error().Err(err).Msg("[OnPrepare] VerifySenderKey failed")
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return
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}
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if err = verifyMessageSig(senderKey, msg); err != nil {
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consensus.getLogger().Error().Err(err).Msg("[OnPrepare] Failed to verify sender's signature")
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return
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}
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recvMsg, err := ParsePbftMessage(msg)
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if err != nil {
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consensus.getLogger().Error().Err(err).Msg("[OnPrepare] Unparseable validator message")
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return
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}
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if recvMsg.ViewID != consensus.viewID || recvMsg.BlockNum != consensus.blockNum {
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consensus.getLogger().Debug().
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Uint64("MsgViewID", recvMsg.ViewID).
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Uint64("MsgBlockNum", recvMsg.BlockNum).
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Uint64("blockNum", consensus.blockNum).
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Msg("[OnPrepare] Message ViewId or BlockNum not match")
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return
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}
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if !consensus.PbftLog.HasMatchingViewAnnounce(consensus.blockNum, consensus.viewID, recvMsg.BlockHash) {
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consensus.getLogger().Debug().
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Uint64("MsgViewID", recvMsg.ViewID).
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Uint64("MsgBlockNum", recvMsg.BlockNum).
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Uint64("blockNum", consensus.blockNum).
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Msg("[OnPrepare] No Matching Announce message")
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//return
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}
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validatorPubKey := recvMsg.SenderPubkey.SerializeToHexStr()
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prepareSig := recvMsg.Payload
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prepareSigs := consensus.prepareSigs
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prepareBitmap := consensus.prepareBitmap
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consensus.mutex.Lock()
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defer consensus.mutex.Unlock()
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logger := consensus.getLogger().With().Str("validatorPubKey", validatorPubKey).Logger()
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if len(prepareSigs) >= consensus.Quorum() {
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// already have enough signatures
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logger.Debug().Msg("[OnPrepare] Received Additional Prepare Message")
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return
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}
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// proceed only when the message is not received before
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_, ok := prepareSigs[validatorPubKey]
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if ok {
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logger.Debug().Msg("[OnPrepare] Already Received prepare message from the validator")
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return
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}
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// Check BLS signature for the multi-sig
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var sign bls.Sign
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err = sign.Deserialize(prepareSig)
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if err != nil {
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consensus.getLogger().Error().Err(err).Msg("[OnPrepare] Failed to deserialize bls signature")
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return
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}
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if !sign.VerifyHash(recvMsg.SenderPubkey, consensus.blockHash[:]) {
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consensus.getLogger().Error().Msg("[OnPrepare] Received invalid BLS signature")
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return
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}
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logger = logger.With().Int("NumReceivedSoFar", len(prepareSigs)).Int("PublicKeys", len(consensus.PublicKeys)).Logger()
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logger.Info().Msg("[OnPrepare] Received New Prepare Signature")
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prepareSigs[validatorPubKey] = &sign
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// Set the bitmap indicating that this validator signed.
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if err := prepareBitmap.SetKey(recvMsg.SenderPubkey, true); err != nil {
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consensus.getLogger().Warn().Err(err).Msg("[OnPrepare] prepareBitmap.SetKey failed")
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return
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}
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if len(prepareSigs) >= consensus.Quorum() {
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logger.Debug().Msg("[OnPrepare] Received Enough Prepare Signatures")
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// Construct and broadcast prepared message
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msgToSend, aggSig := consensus.constructPreparedMessage()
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consensus.aggregatedPrepareSig = aggSig
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//leader adds prepared message to log
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msgPayload, _ := proto.GetConsensusMessagePayload(msgToSend)
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msg := &msg_pb.Message{}
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_ = protobuf.Unmarshal(msgPayload, msg)
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pbftMsg, err := ParsePbftMessage(msg)
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if err != nil {
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consensus.getLogger().Warn().Err(err).Msg("[OnPrepare] Unable to parse pbft message")
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return
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}
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consensus.PbftLog.AddMessage(pbftMsg)
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// Leader add commit phase signature
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blockNumHash := make([]byte, 8)
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binary.LittleEndian.PutUint64(blockNumHash, consensus.blockNum)
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commitPayload := append(blockNumHash, consensus.blockHash[:]...)
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consensus.commitSigs[consensus.PubKey.SerializeToHexStr()] = consensus.priKey.SignHash(commitPayload)
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if err := consensus.commitBitmap.SetKey(consensus.PubKey, true); err != nil {
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consensus.getLogger().Debug().Msg("[OnPrepare] Leader commit bitmap set failed")
|
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return
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}
|
|
|
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if err := consensus.msgSender.SendWithRetry(consensus.blockNum, msg_pb.MessageType_PREPARED, []p2p.GroupID{p2p.NewGroupIDByShardID(p2p.ShardID(consensus.ShardID))}, host.ConstructP2pMessage(byte(17), msgToSend)); err != nil {
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consensus.getLogger().Warn().Msg("[OnPrepare] Cannot send prepared message")
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} else {
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consensus.getLogger().Debug().
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Bytes("blockHash", consensus.blockHash[:]).
|
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Uint64("blockNum", consensus.blockNum).
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Msg("[OnPrepare] Sent Prepared Message!!")
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}
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consensus.msgSender.StopRetry(msg_pb.MessageType_ANNOUNCE)
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consensus.msgSender.StopRetry(msg_pb.MessageType_COMMITTED) // Stop retry committed msg of last consensus
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|
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consensus.getLogger().Debug().
|
|
Str("From", consensus.phase.String()).
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Str("To", Commit.String()).
|
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Msg("[OnPrepare] Switching phase")
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consensus.switchPhase(Commit, true)
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}
|
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return
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}
|
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|
|
func (consensus *Consensus) onPrepared(msg *msg_pb.Message) {
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consensus.getLogger().Debug().Msg("[OnPrepared] Received Prepared message")
|
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if consensus.IsLeader() && consensus.mode.Mode() == Normal {
|
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return
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}
|
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|
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senderKey, err := consensus.verifySenderKey(msg)
|
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if err != nil {
|
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consensus.getLogger().Debug().Err(err).Msg("[OnPrepared] VerifySenderKey failed")
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return
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}
|
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if !senderKey.IsEqual(consensus.LeaderPubKey) && consensus.mode.Mode() == Normal && !consensus.ignoreViewIDCheck {
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consensus.getLogger().Warn().Msg("[OnPrepared] SenderKey not match leader PubKey")
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return
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}
|
|
if err := verifyMessageSig(senderKey, msg); err != nil {
|
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consensus.getLogger().Debug().Err(err).Msg("[OnPrepared] Failed to verify sender's signature")
|
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return
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}
|
|
|
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recvMsg, err := ParsePbftMessage(msg)
|
|
if err != nil {
|
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consensus.getLogger().Debug().Err(err).Msg("[OnPrepared] Unparseable validator message")
|
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return
|
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}
|
|
consensus.getLogger().Info().
|
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Uint64("MsgBlockNum", recvMsg.BlockNum).
|
|
Uint64("MsgViewID", recvMsg.ViewID).
|
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Msg("[OnPrepared] Received prepared message")
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|
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if recvMsg.BlockNum < consensus.blockNum {
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consensus.getLogger().Debug().Uint64("MsgBlockNum", recvMsg.BlockNum).Msg("Old Block Received, ignoring!!")
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return
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}
|
|
|
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// check validity of prepared signature
|
|
blockHash := recvMsg.BlockHash
|
|
aggSig, mask, err := consensus.ReadSignatureBitmapPayload(recvMsg.Payload, 0)
|
|
if err != nil {
|
|
consensus.getLogger().Error().Err(err).Msg("ReadSignatureBitmapPayload failed!!")
|
|
return
|
|
}
|
|
if count := utils.CountOneBits(mask.Bitmap); count < consensus.Quorum() {
|
|
consensus.getLogger().Debug().
|
|
Int("Need", consensus.Quorum()).
|
|
Int("Got", count).
|
|
Msg("Not enough signatures in the Prepared msg")
|
|
return
|
|
}
|
|
if !aggSig.VerifyHash(mask.AggregatePublic, blockHash[:]) {
|
|
myBlockHash := common.Hash{}
|
|
myBlockHash.SetBytes(consensus.blockHash[:])
|
|
consensus.getLogger().Warn().
|
|
Uint64("MsgBlockNum", recvMsg.BlockNum).
|
|
Uint64("MsgViewID", recvMsg.ViewID).
|
|
Msg("[OnPrepared] failed to verify multi signature for prepare phase")
|
|
return
|
|
}
|
|
|
|
// check validity of block
|
|
block := recvMsg.Block
|
|
var blockObj types.Block
|
|
err = rlp.DecodeBytes(block, &blockObj)
|
|
if err != nil {
|
|
consensus.getLogger().Warn().
|
|
Err(err).
|
|
Uint64("MsgBlockNum", recvMsg.BlockNum).
|
|
Msg("[OnPrepared] Unparseable block header data")
|
|
return
|
|
}
|
|
if blockObj.NumberU64() != recvMsg.BlockNum || recvMsg.BlockNum < consensus.blockNum {
|
|
consensus.getLogger().Warn().
|
|
Uint64("MsgBlockNum", recvMsg.BlockNum).
|
|
Uint64("blockNum", blockObj.NumberU64()).
|
|
Msg("[OnPrepared] BlockNum not match")
|
|
return
|
|
}
|
|
if blockObj.Header().Hash() != recvMsg.BlockHash {
|
|
consensus.getLogger().Warn().
|
|
Uint64("MsgBlockNum", recvMsg.BlockNum).
|
|
Bytes("MsgBlockHash", recvMsg.BlockHash[:]).
|
|
Str("blockObjHash", blockObj.Header().Hash().Hex()).
|
|
Msg("[OnPrepared] BlockHash not match")
|
|
return
|
|
}
|
|
if consensus.mode.Mode() == Normal {
|
|
if err := consensus.VerifyHeader(consensus.ChainReader, blockObj.Header(), true); err != nil {
|
|
consensus.getLogger().Warn().
|
|
Err(err).
|
|
Str("inChain", consensus.ChainReader.CurrentHeader().Number.String()).
|
|
Str("MsgBlockNum", blockObj.Header().Number.String()).
|
|
Msg("[OnPrepared] Block header is not verified successfully")
|
|
return
|
|
}
|
|
if consensus.BlockVerifier == nil {
|
|
// do nothing
|
|
} else if err := consensus.BlockVerifier(&blockObj); err != nil {
|
|
consensus.getLogger().Error().Err(err).Msg("[OnPrepared] Block verification failed")
|
|
return
|
|
}
|
|
}
|
|
|
|
consensus.PbftLog.AddBlock(&blockObj)
|
|
recvMsg.Block = []byte{} // save memory space
|
|
consensus.PbftLog.AddMessage(recvMsg)
|
|
consensus.getLogger().Debug().
|
|
Uint64("MsgViewID", recvMsg.ViewID).
|
|
Uint64("MsgBlockNum", recvMsg.BlockNum).
|
|
Bytes("blockHash", recvMsg.BlockHash[:]).
|
|
Msg("[OnPrepared] Prepared message and block added")
|
|
|
|
consensus.mutex.Lock()
|
|
defer consensus.mutex.Unlock()
|
|
|
|
consensus.tryCatchup()
|
|
if consensus.mode.Mode() == ViewChanging {
|
|
consensus.getLogger().Debug().Msg("[OnPrepared] Still in ViewChanging mode, Exiting!!")
|
|
return
|
|
}
|
|
|
|
if consensus.checkViewID(recvMsg) != nil {
|
|
if consensus.mode.Mode() == Normal {
|
|
consensus.getLogger().Debug().
|
|
Uint64("MsgViewID", recvMsg.ViewID).
|
|
Uint64("MsgBlockNum", recvMsg.BlockNum).
|
|
Msg("[OnPrepared] ViewID check failed")
|
|
}
|
|
return
|
|
}
|
|
if recvMsg.BlockNum > consensus.blockNum {
|
|
consensus.getLogger().Debug().
|
|
Uint64("MsgBlockNum", recvMsg.BlockNum).
|
|
Uint64("blockNum", consensus.blockNum).
|
|
Msg("[OnPrepared] Future Block Received, ignoring!!")
|
|
return
|
|
}
|
|
|
|
// add block field
|
|
blockPayload := make([]byte, len(block))
|
|
copy(blockPayload[:], block[:])
|
|
consensus.block = blockPayload
|
|
|
|
// add preparedSig field
|
|
consensus.aggregatedPrepareSig = aggSig
|
|
consensus.prepareBitmap = mask
|
|
|
|
// Optimistically add blockhash field of prepare message
|
|
emptyHash := [32]byte{}
|
|
if bytes.Compare(consensus.blockHash[:], emptyHash[:]) == 0 {
|
|
copy(consensus.blockHash[:], blockHash[:])
|
|
}
|
|
|
|
// Construct and send the commit message
|
|
blockNumBytes := make([]byte, 8)
|
|
binary.LittleEndian.PutUint64(blockNumBytes, consensus.blockNum)
|
|
commitPayload := append(blockNumBytes, consensus.blockHash[:]...)
|
|
msgToSend := consensus.constructCommitMessage(commitPayload)
|
|
|
|
// TODO: genesis account node delay for 1 second, this is a temp fix for allows FN nodes to earning reward
|
|
if consensus.delayCommit > 0 {
|
|
time.Sleep(consensus.delayCommit)
|
|
}
|
|
|
|
if err := consensus.msgSender.SendWithoutRetry([]p2p.GroupID{p2p.NewGroupIDByShardID(p2p.ShardID(consensus.ShardID))}, host.ConstructP2pMessage(byte(17), msgToSend)); err != nil {
|
|
consensus.getLogger().Warn().Msg("[OnPrepared] Cannot send commit message!!")
|
|
} else {
|
|
consensus.getLogger().Info().
|
|
Uint64("blockNum", consensus.blockNum).
|
|
Bytes("blockHash", consensus.blockHash[:]).
|
|
Msg("[OnPrepared] Sent Commit Message!!")
|
|
}
|
|
|
|
consensus.getLogger().Debug().
|
|
Str("From", consensus.phase.String()).
|
|
Str("To", Commit.String()).
|
|
Msg("[OnPrepared] Switching phase")
|
|
consensus.switchPhase(Commit, true)
|
|
|
|
return
|
|
}
|
|
|
|
// TODO: move it to consensus_leader.go later
|
|
func (consensus *Consensus) onCommit(msg *msg_pb.Message) {
|
|
if !consensus.IsLeader() {
|
|
return
|
|
}
|
|
|
|
senderKey, err := consensus.verifySenderKey(msg)
|
|
if err != nil {
|
|
consensus.getLogger().Debug().Err(err).Msg("[OnCommit] VerifySenderKey Failed")
|
|
return
|
|
}
|
|
if err = verifyMessageSig(senderKey, msg); err != nil {
|
|
consensus.getLogger().Debug().Err(err).Msg("[OnCommit] Failed to verify sender's signature")
|
|
return
|
|
}
|
|
|
|
recvMsg, err := ParsePbftMessage(msg)
|
|
if err != nil {
|
|
consensus.getLogger().Debug().Err(err).Msg("[OnCommit] Parse pbft message failed")
|
|
return
|
|
}
|
|
|
|
if recvMsg.ViewID != consensus.viewID || recvMsg.BlockNum != consensus.blockNum {
|
|
consensus.getLogger().Debug().
|
|
Uint64("MsgViewID", recvMsg.ViewID).
|
|
Uint64("MsgBlockNum", recvMsg.BlockNum).
|
|
Uint64("blockNum", consensus.blockNum).
|
|
Str("ValidatorPubKey", recvMsg.SenderPubkey.SerializeToHexStr()).
|
|
Msg("[OnCommit] BlockNum/viewID not match")
|
|
return
|
|
}
|
|
|
|
if !consensus.PbftLog.HasMatchingAnnounce(consensus.blockNum, recvMsg.BlockHash) {
|
|
consensus.getLogger().Debug().
|
|
Bytes("MsgBlockHash", recvMsg.BlockHash[:]).
|
|
Uint64("MsgBlockNum", recvMsg.BlockNum).
|
|
Uint64("blockNum", consensus.blockNum).
|
|
Msg("[OnCommit] Cannot find matching blockhash")
|
|
return
|
|
}
|
|
|
|
if !consensus.PbftLog.HasMatchingPrepared(consensus.blockNum, recvMsg.BlockHash) {
|
|
consensus.getLogger().Debug().
|
|
Bytes("blockHash", recvMsg.BlockHash[:]).
|
|
Uint64("blockNum", consensus.blockNum).
|
|
Msg("[OnCommit] Cannot find matching prepared message")
|
|
return
|
|
}
|
|
|
|
validatorPubKey := recvMsg.SenderPubkey.SerializeToHexStr()
|
|
|
|
commitSig := recvMsg.Payload
|
|
|
|
consensus.mutex.Lock()
|
|
defer consensus.mutex.Unlock()
|
|
|
|
logger := consensus.getLogger().With().Str("validatorPubKey", validatorPubKey).Logger()
|
|
if !consensus.IsValidatorInCommittee(recvMsg.SenderPubkey) {
|
|
logger.Error().Msg("[OnCommit] Invalid validator")
|
|
return
|
|
}
|
|
|
|
commitSigs := consensus.commitSigs
|
|
commitBitmap := consensus.commitBitmap
|
|
|
|
// proceed only when the message is not received before
|
|
_, ok := commitSigs[validatorPubKey]
|
|
if ok {
|
|
logger.Debug().Msg("[OnCommit] Already received commit message from the validator")
|
|
return
|
|
}
|
|
|
|
quorumWasMet := len(commitSigs) >= consensus.Quorum()
|
|
|
|
// Verify the signature on commitPayload is correct
|
|
var sign bls.Sign
|
|
err = sign.Deserialize(commitSig)
|
|
if err != nil {
|
|
logger.Debug().Msg("[OnCommit] Failed to deserialize bls signature")
|
|
return
|
|
}
|
|
blockNumHash := make([]byte, 8)
|
|
binary.LittleEndian.PutUint64(blockNumHash, recvMsg.BlockNum)
|
|
commitPayload := append(blockNumHash, recvMsg.BlockHash[:]...)
|
|
logger = logger.With().Uint64("MsgViewID", recvMsg.ViewID).Uint64("MsgBlockNum", recvMsg.BlockNum).Logger()
|
|
if !sign.VerifyHash(recvMsg.SenderPubkey, commitPayload) {
|
|
logger.Error().Msg("[OnCommit] Cannot verify commit message")
|
|
return
|
|
}
|
|
|
|
logger = logger.With().Int("numReceivedSoFar", len(commitSigs)).Logger()
|
|
logger.Info().Msg("[OnCommit] Received new commit message")
|
|
commitSigs[validatorPubKey] = &sign
|
|
// Set the bitmap indicating that this validator signed.
|
|
if err := commitBitmap.SetKey(recvMsg.SenderPubkey, true); err != nil {
|
|
consensus.getLogger().Warn().Err(err).Msg("[OnCommit] commitBitmap.SetKey failed")
|
|
return
|
|
}
|
|
|
|
quorumIsMet := len(commitSigs) >= consensus.Quorum()
|
|
rewardThresholdIsMet := len(commitSigs) >= consensus.RewardThreshold()
|
|
|
|
if !quorumWasMet && quorumIsMet {
|
|
logger.Info().Msg("[OnCommit] 2/3 Enough commits received")
|
|
go func(viewID uint64) {
|
|
time.Sleep(2 * time.Second)
|
|
logger.Debug().Msg("[OnCommit] Commit Grace Period Ended")
|
|
consensus.commitFinishChan <- viewID
|
|
}(consensus.viewID)
|
|
|
|
consensus.msgSender.StopRetry(msg_pb.MessageType_PREPARED)
|
|
}
|
|
|
|
if rewardThresholdIsMet {
|
|
go func(viewID uint64) {
|
|
consensus.commitFinishChan <- viewID
|
|
logger.Info().Msg("[OnCommit] 90% Enough commits received")
|
|
}(consensus.viewID)
|
|
}
|
|
}
|
|
|
|
func (consensus *Consensus) finalizeCommits() {
|
|
consensus.getLogger().Info().Int("NumCommits", len(consensus.commitSigs)).Msg("[Finalizing] Finalizing Block")
|
|
|
|
beforeCatchupNum := consensus.blockNum
|
|
beforeCatchupViewID := consensus.viewID
|
|
|
|
// Construct committed message
|
|
msgToSend, aggSig := consensus.constructCommittedMessage()
|
|
consensus.aggregatedCommitSig = aggSig // this may not needed
|
|
|
|
// leader adds committed message to log
|
|
msgPayload, _ := proto.GetConsensusMessagePayload(msgToSend)
|
|
msg := &msg_pb.Message{}
|
|
_ = protobuf.Unmarshal(msgPayload, msg)
|
|
pbftMsg, err := ParsePbftMessage(msg)
|
|
if err != nil {
|
|
consensus.getLogger().Warn().Err(err).Msg("[FinalizeCommits] Unable to parse pbft message")
|
|
return
|
|
}
|
|
consensus.PbftLog.AddMessage(pbftMsg)
|
|
consensus.ChainReader.WriteLastCommits(pbftMsg.Payload)
|
|
|
|
// find correct block content
|
|
block := consensus.PbftLog.GetBlockByHash(consensus.blockHash)
|
|
if block == nil {
|
|
consensus.getLogger().Warn().
|
|
Str("blockHash", hex.EncodeToString(consensus.blockHash[:])).
|
|
Msg("[FinalizeCommits] Cannot find block by hash")
|
|
return
|
|
}
|
|
consensus.tryCatchup()
|
|
if consensus.blockNum-beforeCatchupNum != 1 {
|
|
consensus.getLogger().Warn().
|
|
Uint64("beforeCatchupBlockNum", beforeCatchupNum).
|
|
Msg("[FinalizeCommits] Leader cannot provide the correct block for committed message")
|
|
return
|
|
}
|
|
// if leader success finalize the block, send committed message to validators
|
|
|
|
if err := consensus.msgSender.SendWithRetry(block.NumberU64(), msg_pb.MessageType_COMMITTED, []p2p.GroupID{p2p.NewGroupIDByShardID(p2p.ShardID(consensus.ShardID))}, host.ConstructP2pMessage(byte(17), msgToSend)); err != nil {
|
|
consensus.getLogger().Warn().Err(err).Msg("[Finalizing] Cannot send committed message")
|
|
} else {
|
|
consensus.getLogger().Info().
|
|
Bytes("blockHash", consensus.blockHash[:]).
|
|
Uint64("blockNum", consensus.blockNum).
|
|
Msg("[Finalizing] Sent Committed Message")
|
|
}
|
|
|
|
consensus.reportMetrics(*block)
|
|
|
|
// Dump new block into level db
|
|
// In current code, we add signatures in block in tryCatchup, the block dump to explorer does not contains signatures
|
|
// but since explorer doesn't need signatures, it should be fine
|
|
// in future, we will move signatures to next block
|
|
//explorer.GetStorageInstance(consensus.leader.IP, consensus.leader.Port, true).Dump(block, beforeCatchupNum)
|
|
|
|
if consensus.consensusTimeout[timeoutBootstrap].IsActive() {
|
|
consensus.consensusTimeout[timeoutBootstrap].Stop()
|
|
consensus.getLogger().Debug().Msg("[Finalizing] Start consensus timer; stop bootstrap timer only once")
|
|
} else {
|
|
consensus.getLogger().Debug().Msg("[Finalizing] Start consensus timer")
|
|
}
|
|
consensus.consensusTimeout[timeoutConsensus].Start()
|
|
|
|
consensus.getLogger().Info().
|
|
Uint64("blockNum", beforeCatchupNum).
|
|
Uint64("ViewId", beforeCatchupViewID).
|
|
Str("blockHash", block.Hash().String()).
|
|
Int("index", consensus.getIndexOfPubKey(consensus.PubKey)).
|
|
Msg("HOORAY!!!!!!! CONSENSUS REACHED!!!!!!!")
|
|
|
|
// Send signal to Node so the new block can be added and new round of consensus can be triggered
|
|
consensus.ReadySignal <- struct{}{}
|
|
}
|
|
|
|
func (consensus *Consensus) onCommitted(msg *msg_pb.Message) {
|
|
consensus.getLogger().Debug().Msg("[OnCommitted] Receive committed message")
|
|
|
|
if consensus.IsLeader() && consensus.mode.Mode() == Normal {
|
|
return
|
|
}
|
|
|
|
senderKey, err := consensus.verifySenderKey(msg)
|
|
if err != nil {
|
|
consensus.getLogger().Warn().Err(err).Msg("[OnCommitted] verifySenderKey failed")
|
|
return
|
|
}
|
|
if !senderKey.IsEqual(consensus.LeaderPubKey) && consensus.mode.Mode() == Normal && !consensus.ignoreViewIDCheck {
|
|
consensus.getLogger().Warn().Msg("[OnCommitted] senderKey not match leader PubKey")
|
|
return
|
|
}
|
|
if err = verifyMessageSig(senderKey, msg); err != nil {
|
|
consensus.getLogger().Warn().Err(err).Msg("[OnCommitted] Failed to verify sender's signature")
|
|
return
|
|
}
|
|
|
|
recvMsg, err := ParsePbftMessage(msg)
|
|
if err != nil {
|
|
consensus.getLogger().Warn().Msg("[OnCommitted] unable to parse msg")
|
|
return
|
|
}
|
|
|
|
if recvMsg.BlockNum < consensus.blockNum {
|
|
consensus.getLogger().Info().
|
|
Uint64("MsgBlockNum", recvMsg.BlockNum).
|
|
Uint64("blockNum", consensus.blockNum).
|
|
Msg("[OnCommitted] Received Old Blocks!!")
|
|
return
|
|
}
|
|
|
|
aggSig, mask, err := consensus.ReadSignatureBitmapPayload(recvMsg.Payload, 0)
|
|
if err != nil {
|
|
consensus.getLogger().Error().Err(err).Msg("[OnCommitted] readSignatureBitmapPayload failed")
|
|
return
|
|
}
|
|
|
|
// check has 2f+1 signatures
|
|
if count := utils.CountOneBits(mask.Bitmap); count < consensus.Quorum() {
|
|
consensus.getLogger().Warn().
|
|
Int("need", consensus.Quorum()).
|
|
Int("got", count).
|
|
Msg("[OnCommitted] Not enough signature in committed msg")
|
|
return
|
|
}
|
|
|
|
blockNumBytes := make([]byte, 8)
|
|
binary.LittleEndian.PutUint64(blockNumBytes, recvMsg.BlockNum)
|
|
commitPayload := append(blockNumBytes, recvMsg.BlockHash[:]...)
|
|
if !aggSig.VerifyHash(mask.AggregatePublic, commitPayload) {
|
|
consensus.getLogger().Error().
|
|
Uint64("MsgBlockNum", recvMsg.BlockNum).
|
|
Msg("[OnCommitted] Failed to verify the multi signature for commit phase")
|
|
return
|
|
}
|
|
|
|
consensus.PbftLog.AddMessage(recvMsg)
|
|
consensus.ChainReader.WriteLastCommits(recvMsg.Payload)
|
|
consensus.getLogger().Debug().
|
|
Uint64("MsgViewID", recvMsg.ViewID).
|
|
Uint64("MsgBlockNum", recvMsg.BlockNum).
|
|
Msg("[OnCommitted] Committed message added")
|
|
|
|
consensus.mutex.Lock()
|
|
defer consensus.mutex.Unlock()
|
|
|
|
consensus.aggregatedCommitSig = aggSig
|
|
consensus.commitBitmap = mask
|
|
|
|
if recvMsg.BlockNum-consensus.blockNum > consensusBlockNumBuffer {
|
|
consensus.getLogger().Debug().Uint64("MsgBlockNum", recvMsg.BlockNum).Msg("[OnCommitted] out of sync")
|
|
go func() {
|
|
select {
|
|
case consensus.blockNumLowChan <- struct{}{}:
|
|
consensus.mode.SetMode(Syncing)
|
|
for _, v := range consensus.consensusTimeout {
|
|
v.Stop()
|
|
}
|
|
case <-time.After(1 * time.Second):
|
|
}
|
|
}()
|
|
return
|
|
}
|
|
|
|
// if consensus.checkViewID(recvMsg) != nil {
|
|
// consensus.getLogger().Debug("viewID check failed", "viewID", recvMsg.ViewID, "myViewID", consensus.viewID)
|
|
// return
|
|
// }
|
|
|
|
consensus.tryCatchup()
|
|
if consensus.mode.Mode() == ViewChanging {
|
|
consensus.getLogger().Debug().Msg("[OnCommitted] Still in ViewChanging mode, Exiting!!")
|
|
return
|
|
}
|
|
|
|
if consensus.consensusTimeout[timeoutBootstrap].IsActive() {
|
|
consensus.consensusTimeout[timeoutBootstrap].Stop()
|
|
consensus.getLogger().Debug().Msg("[OnCommitted] Start consensus timer; stop bootstrap timer only once")
|
|
} else {
|
|
consensus.getLogger().Debug().Msg("[OnCommitted] Start consensus timer")
|
|
}
|
|
consensus.consensusTimeout[timeoutConsensus].Start()
|
|
return
|
|
}
|
|
|
|
// LastCommitSig returns the byte array of aggregated commit signature and bitmap of last block
|
|
func (consensus *Consensus) LastCommitSig() ([]byte, []byte, error) {
|
|
if consensus.blockNum <= 1 {
|
|
return nil, nil, nil
|
|
}
|
|
lastCommits, err := consensus.ChainReader.ReadLastCommits()
|
|
if err != nil || len(lastCommits) < 96 {
|
|
msgs := consensus.PbftLog.GetMessagesByTypeSeq(msg_pb.MessageType_COMMITTED, consensus.blockNum-1)
|
|
if len(msgs) != 1 {
|
|
return nil, nil, ctxerror.New("GetLastCommitSig failed with wrong number of committed message", "numCommittedMsg", len(msgs))
|
|
}
|
|
lastCommits = msgs[0].Payload
|
|
}
|
|
//#### Read payload data from committed msg
|
|
aggSig := make([]byte, 96)
|
|
bitmap := make([]byte, len(lastCommits)-96)
|
|
offset := 0
|
|
copy(aggSig[:], lastCommits[offset:offset+96])
|
|
offset += 96
|
|
copy(bitmap[:], lastCommits[offset:])
|
|
//#### END Read payload data from committed msg
|
|
return aggSig, bitmap, nil
|
|
}
|
|
|
|
// try to catch up if fall behind
|
|
func (consensus *Consensus) tryCatchup() {
|
|
consensus.getLogger().Info().Msg("[TryCatchup] commit new blocks")
|
|
// if consensus.phase != Commit && consensus.mode.Mode() == Normal {
|
|
// return
|
|
// }
|
|
currentBlockNum := consensus.blockNum
|
|
for {
|
|
msgs := consensus.PbftLog.GetMessagesByTypeSeq(msg_pb.MessageType_COMMITTED, consensus.blockNum)
|
|
if len(msgs) == 0 {
|
|
break
|
|
}
|
|
if len(msgs) > 1 {
|
|
consensus.getLogger().Error().
|
|
Int("numMsgs", len(msgs)).
|
|
Msg("[TryCatchup] DANGER!!! we should only get one committed message for a given blockNum")
|
|
}
|
|
consensus.getLogger().Info().Msg("[TryCatchup] committed message found")
|
|
|
|
block := consensus.PbftLog.GetBlockByHash(msgs[0].BlockHash)
|
|
if block == nil {
|
|
break
|
|
}
|
|
|
|
if consensus.BlockVerifier == nil {
|
|
// do nothing
|
|
} else if err := consensus.BlockVerifier(block); err != nil {
|
|
consensus.getLogger().Info().Msg("[TryCatchup]block verification faied")
|
|
return
|
|
}
|
|
|
|
if block.ParentHash() != consensus.ChainReader.CurrentHeader().Hash() {
|
|
consensus.getLogger().Debug().Msg("[TryCatchup] parent block hash not match")
|
|
break
|
|
}
|
|
consensus.getLogger().Info().Msg("[TryCatchup] block found to commit")
|
|
|
|
preparedMsgs := consensus.PbftLog.GetMessagesByTypeSeqHash(msg_pb.MessageType_PREPARED, msgs[0].BlockNum, msgs[0].BlockHash)
|
|
msg := consensus.PbftLog.FindMessageByMaxViewID(preparedMsgs)
|
|
if msg == nil {
|
|
break
|
|
}
|
|
consensus.getLogger().Info().Msg("[TryCatchup] prepared message found to commit")
|
|
|
|
consensus.blockHash = [32]byte{}
|
|
consensus.blockNum = consensus.blockNum + 1
|
|
consensus.viewID = msgs[0].ViewID + 1
|
|
consensus.LeaderPubKey = msgs[0].SenderPubkey
|
|
|
|
consensus.getLogger().Info().Msg("[TryCatchup] Adding block to chain")
|
|
consensus.OnConsensusDone(block)
|
|
consensus.ResetState()
|
|
|
|
select {
|
|
case consensus.VerifiedNewBlock <- block:
|
|
default:
|
|
consensus.getLogger().Info().
|
|
Str("blockHash", block.Hash().String()).
|
|
Msg("[TryCatchup] consensus verified block send to chan failed")
|
|
continue
|
|
}
|
|
|
|
break
|
|
}
|
|
if currentBlockNum < consensus.blockNum {
|
|
consensus.getLogger().Info().
|
|
Uint64("From", currentBlockNum).
|
|
Uint64("To", consensus.blockNum).
|
|
Msg("[TryCatchup] Caught up!")
|
|
consensus.switchPhase(Announce, true)
|
|
}
|
|
// catup up and skip from view change trap
|
|
if currentBlockNum < consensus.blockNum && consensus.mode.Mode() == ViewChanging {
|
|
consensus.mode.SetMode(Normal)
|
|
consensus.consensusTimeout[timeoutViewChange].Stop()
|
|
}
|
|
// clean up old log
|
|
consensus.PbftLog.DeleteBlocksLessThan(consensus.blockNum - 1)
|
|
consensus.PbftLog.DeleteMessagesLessThan(consensus.blockNum - 1)
|
|
}
|
|
|
|
// Start waits for the next new block and run consensus
|
|
func (consensus *Consensus) Start(blockChannel chan *types.Block, stopChan chan struct{}, stoppedChan chan struct{}, startChannel chan struct{}) {
|
|
go func() {
|
|
if consensus.IsLeader() {
|
|
consensus.getLogger().Info().Time("time", time.Now()).Msg("[ConsensusMainLoop] Waiting for consensus start")
|
|
<-startChannel
|
|
|
|
// send a signal to indicate it's ready to run consensus
|
|
// this signal is consumed by node object to create a new block and in turn trigger a new consensus on it
|
|
go func() {
|
|
consensus.getLogger().Info().Time("time", time.Now()).Msg("[ConsensusMainLoop] Send ReadySignal")
|
|
consensus.ReadySignal <- struct{}{}
|
|
}()
|
|
}
|
|
consensus.getLogger().Info().Time("time", time.Now()).Msg("[ConsensusMainLoop] Consensus started")
|
|
defer close(stoppedChan)
|
|
ticker := time.NewTicker(3 * time.Second)
|
|
consensus.consensusTimeout[timeoutBootstrap].Start()
|
|
consensus.getLogger().Debug().
|
|
Uint64("viewID", consensus.viewID).
|
|
Uint64("blockNum", consensus.blockNum).
|
|
Msg("[ConsensusMainLoop] Start bootstrap timeout (only once)")
|
|
|
|
vdfInProgress := false
|
|
for {
|
|
select {
|
|
case <-ticker.C:
|
|
for k, v := range consensus.consensusTimeout {
|
|
if consensus.mode.Mode() == Syncing || consensus.mode.Mode() == Listening {
|
|
v.Stop()
|
|
}
|
|
if !v.CheckExpire() {
|
|
continue
|
|
}
|
|
if k != timeoutViewChange {
|
|
consensus.getLogger().Debug().Msg("[ConsensusMainLoop] Ops Consensus Timeout!!!")
|
|
consensus.startViewChange(consensus.viewID + 1)
|
|
break
|
|
} else {
|
|
consensus.getLogger().Debug().Msg("[ConsensusMainLoop] Ops View Change Timeout!!!")
|
|
viewID := consensus.mode.ViewID()
|
|
consensus.startViewChange(viewID + 1)
|
|
break
|
|
}
|
|
}
|
|
case <-consensus.syncReadyChan:
|
|
consensus.SetBlockNum(consensus.ChainReader.CurrentHeader().Number.Uint64() + 1)
|
|
consensus.SetViewID(consensus.ChainReader.CurrentHeader().ViewID.Uint64() + 1)
|
|
mode := consensus.UpdateConsensusInformation()
|
|
consensus.mode.SetMode(mode)
|
|
consensus.getLogger().Info().Str("Mode", mode.String()).Msg("Node is in sync")
|
|
|
|
case <-consensus.syncNotReadyChan:
|
|
consensus.SetBlockNum(consensus.ChainReader.CurrentHeader().Number.Uint64() + 1)
|
|
consensus.mode.SetMode(Syncing)
|
|
consensus.getLogger().Info().Msg("Node is out of sync")
|
|
|
|
case newBlock := <-blockChannel:
|
|
consensus.getLogger().Info().
|
|
Uint64("MsgBlockNum", newBlock.NumberU64()).
|
|
Msg("[ConsensusMainLoop] Received Proposed New Block!")
|
|
|
|
//VRF/VDF is only generated in the beacon chain
|
|
if consensus.NeedsRandomNumberGeneration(newBlock.Header().Epoch) {
|
|
// generate VRF if the current block has a new leader
|
|
if !consensus.ChainReader.IsSameLeaderAsPreviousBlock(newBlock) {
|
|
vrfBlockNumbers, err := consensus.ChainReader.ReadEpochVrfBlockNums(newBlock.Header().Epoch)
|
|
if err != nil {
|
|
consensus.getLogger().Info().
|
|
Uint64("MsgBlockNum", newBlock.NumberU64()).
|
|
Uint64("Epoch", newBlock.Header().Epoch.Uint64()).
|
|
Msg("[ConsensusMainLoop] no VRF block number from local db")
|
|
}
|
|
|
|
//check if VRF is already generated for the current block
|
|
vrfAlreadyGenerated := false
|
|
for _, v := range vrfBlockNumbers {
|
|
if v == newBlock.NumberU64() {
|
|
consensus.getLogger().Info().
|
|
Uint64("MsgBlockNum", newBlock.NumberU64()).
|
|
Uint64("Epoch", newBlock.Header().Epoch.Uint64()).
|
|
Msg("[ConsensusMainLoop] VRF is already generated for this block")
|
|
vrfAlreadyGenerated = true
|
|
break
|
|
}
|
|
}
|
|
|
|
if !vrfAlreadyGenerated {
|
|
//generate a new VRF for the current block
|
|
vrfBlockNumbers := consensus.GenerateVrfAndProof(newBlock, vrfBlockNumbers)
|
|
|
|
//generate a new VDF for the current epoch if there are enough VRFs in the current epoch
|
|
//note that >= instead of == is used, because it is possible the current leader
|
|
//can commit this block, go offline without finishing VDF
|
|
if (!vdfInProgress) && len(vrfBlockNumbers) >= consensus.VdfSeedSize() {
|
|
//check local database to see if there's a VDF generated for this epoch
|
|
//generate a VDF if no blocknum is available
|
|
_, err := consensus.ChainReader.ReadEpochVdfBlockNum(newBlock.Header().Epoch)
|
|
if err != nil {
|
|
consensus.GenerateVdfAndProof(newBlock, vrfBlockNumbers)
|
|
vdfInProgress = true
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
vdfOutput, seed, err := consensus.GetNextRnd()
|
|
if err == nil {
|
|
vdfInProgress = false
|
|
// Verify the randomness
|
|
vdfObject := vdf_go.New(core.ShardingSchedule.VdfDifficulty(), seed)
|
|
if !vdfObject.Verify(vdfOutput) {
|
|
consensus.getLogger().Warn().
|
|
Uint64("MsgBlockNum", newBlock.NumberU64()).
|
|
Uint64("Epoch", newBlock.Header().Epoch.Uint64()).
|
|
Msg("[ConsensusMainLoop] failed to verify the VDF output")
|
|
} else {
|
|
//write the VDF only if VDF has not been generated
|
|
_, err := consensus.ChainReader.ReadEpochVdfBlockNum(newBlock.Header().Epoch)
|
|
if err == nil {
|
|
consensus.getLogger().Info().
|
|
Uint64("MsgBlockNum", newBlock.NumberU64()).
|
|
Uint64("Epoch", newBlock.Header().Epoch.Uint64()).
|
|
Msg("[ConsensusMainLoop] VDF has already been generated previously")
|
|
} else {
|
|
consensus.getLogger().Info().
|
|
Uint64("MsgBlockNum", newBlock.NumberU64()).
|
|
Uint64("Epoch", newBlock.Header().Epoch.Uint64()).
|
|
Msg("[ConsensusMainLoop] Generated a new VDF")
|
|
|
|
newBlock.AddVdf(vdfOutput[:])
|
|
}
|
|
}
|
|
} else {
|
|
//consensus.getLogger().Error().Err(err). Msg("[ConsensusMainLoop] Failed to get randomness")
|
|
}
|
|
}
|
|
|
|
startTime = time.Now()
|
|
consensus.msgSender.Reset(newBlock.NumberU64())
|
|
|
|
consensus.getLogger().Debug().
|
|
Int("numTxs", len(newBlock.Transactions())).
|
|
Interface("consensus", consensus).
|
|
Time("startTime", startTime).
|
|
Int("publicKeys", len(consensus.PublicKeys)).
|
|
Msg("[ConsensusMainLoop] STARTING CONSENSUS")
|
|
consensus.announce(newBlock)
|
|
|
|
case msg := <-consensus.MsgChan:
|
|
consensus.handleMessageUpdate(msg)
|
|
|
|
case viewID := <-consensus.commitFinishChan:
|
|
func() {
|
|
consensus.mutex.Lock()
|
|
defer consensus.mutex.Unlock()
|
|
if viewID == consensus.viewID {
|
|
consensus.finalizeCommits()
|
|
}
|
|
}()
|
|
|
|
case <-stopChan:
|
|
return
|
|
}
|
|
}
|
|
}()
|
|
}
|
|
|
|
// GenerateVrfAndProof generates new VRF/Proof from hash of previous block
|
|
func (consensus *Consensus) GenerateVrfAndProof(newBlock *types.Block, vrfBlockNumbers []uint64) []uint64 {
|
|
sk := vrf_bls.NewVRFSigner(consensus.priKey)
|
|
blockHash := [32]byte{}
|
|
previousHeader := consensus.ChainReader.GetHeaderByNumber(newBlock.NumberU64() - 1)
|
|
previousHash := previousHeader.Hash()
|
|
copy(blockHash[:], previousHash[:])
|
|
|
|
vrf, proof := sk.Evaluate(blockHash[:])
|
|
newBlock.AddVrf(append(vrf[:], proof...))
|
|
|
|
consensus.getLogger().Info().
|
|
Uint64("MsgBlockNum", newBlock.NumberU64()).
|
|
Uint64("Epoch", newBlock.Header().Epoch.Uint64()).
|
|
Int("Num of VRF", len(vrfBlockNumbers)).
|
|
Msg("[ConsensusMainLoop] Leader generated a VRF")
|
|
|
|
return vrfBlockNumbers
|
|
}
|
|
|
|
// ValidateVrfAndProof validates a VRF/Proof from hash of previous block
|
|
func (consensus *Consensus) ValidateVrfAndProof(headerObj types.Header) bool {
|
|
vrfPk := vrf_bls.NewVRFVerifier(consensus.LeaderPubKey)
|
|
|
|
var blockHash [32]byte
|
|
previousHeader := consensus.ChainReader.GetHeaderByNumber(headerObj.Number.Uint64() - 1)
|
|
previousHash := previousHeader.Hash()
|
|
copy(blockHash[:], previousHash[:])
|
|
|
|
vrfProof := [96]byte{}
|
|
copy(vrfProof[:], headerObj.Vrf[32:])
|
|
hash, err := vrfPk.ProofToHash(blockHash[:], vrfProof[:])
|
|
if err != nil {
|
|
consensus.getLogger().Warn().
|
|
Err(err).
|
|
Str("MsgBlockNum", headerObj.Number.String()).
|
|
Msg("[OnAnnounce] VRF verification error")
|
|
return false
|
|
}
|
|
|
|
if !bytes.Equal(hash[:], headerObj.Vrf[:32]) {
|
|
consensus.getLogger().Warn().
|
|
Str("MsgBlockNum", headerObj.Number.String()).
|
|
Msg("[OnAnnounce] VRF proof is not valid")
|
|
return false
|
|
}
|
|
|
|
vrfBlockNumbers, _ := consensus.ChainReader.ReadEpochVrfBlockNums(headerObj.Epoch)
|
|
consensus.getLogger().Info().
|
|
Str("MsgBlockNum", headerObj.Number.String()).
|
|
Int("Number of VRF", len(vrfBlockNumbers)).
|
|
Msg("[OnAnnounce] validated a new VRF")
|
|
|
|
return true
|
|
}
|
|
|
|
// GenerateVdfAndProof generates new VDF/Proof from VRFs in the current epoch
|
|
func (consensus *Consensus) GenerateVdfAndProof(newBlock *types.Block, vrfBlockNumbers []uint64) {
|
|
//derive VDF seed from VRFs generated in the current epoch
|
|
seed := [32]byte{}
|
|
for i := 0; i < consensus.VdfSeedSize(); i++ {
|
|
previousVrf := consensus.ChainReader.GetVrfByNumber(vrfBlockNumbers[i])
|
|
for j := 0; j < len(seed); j++ {
|
|
seed[j] = seed[j] ^ previousVrf[j]
|
|
}
|
|
}
|
|
|
|
consensus.getLogger().Info().
|
|
Uint64("MsgBlockNum", newBlock.NumberU64()).
|
|
Uint64("Epoch", newBlock.Header().Epoch.Uint64()).
|
|
Int("Num of VRF", len(vrfBlockNumbers)).
|
|
Msg("[ConsensusMainLoop] VDF computation started")
|
|
|
|
go func() {
|
|
vdf := vdf_go.New(core.ShardingSchedule.VdfDifficulty(), seed)
|
|
outputChannel := vdf.GetOutputChannel()
|
|
start := time.Now()
|
|
vdf.Execute()
|
|
duration := time.Now().Sub(start)
|
|
consensus.getLogger().Info().
|
|
Dur("duration", duration).
|
|
Msg("[ConsensusMainLoop] VDF computation finished")
|
|
output := <-outputChannel
|
|
|
|
// The first 516 bytes are the VDF+proof and the last 32 bytes are XORed VRF as seed
|
|
rndBytes := [548]byte{}
|
|
copy(rndBytes[:516], output[:])
|
|
copy(rndBytes[516:], seed[:])
|
|
consensus.RndChannel <- rndBytes
|
|
}()
|
|
}
|
|
|
|
// ValidateVdfAndProof validates the VDF/proof in the current epoch
|
|
func (consensus *Consensus) ValidateVdfAndProof(headerObj types.Header) bool {
|
|
vrfBlockNumbers, err := consensus.ChainReader.ReadEpochVrfBlockNums(headerObj.Epoch)
|
|
if err != nil {
|
|
consensus.getLogger().Error().Err(err).
|
|
Str("MsgBlockNum", headerObj.Number.String()).
|
|
Msg("[OnAnnounce] failed to read VRF block numbers for VDF computation")
|
|
}
|
|
|
|
//extra check to make sure there's no index out of range error
|
|
//it can happen if epoch is messed up, i.e. VDF ouput is generated in the next epoch
|
|
if consensus.VdfSeedSize() > len(vrfBlockNumbers) {
|
|
return false
|
|
}
|
|
|
|
seed := [32]byte{}
|
|
for i := 0; i < consensus.VdfSeedSize(); i++ {
|
|
previousVrf := consensus.ChainReader.GetVrfByNumber(vrfBlockNumbers[i])
|
|
for j := 0; j < len(seed); j++ {
|
|
seed[j] = seed[j] ^ previousVrf[j]
|
|
}
|
|
}
|
|
|
|
vdfObject := vdf_go.New(core.ShardingSchedule.VdfDifficulty(), seed)
|
|
vdfOutput := [516]byte{}
|
|
copy(vdfOutput[:], headerObj.Vdf)
|
|
if vdfObject.Verify(vdfOutput) {
|
|
consensus.getLogger().Info().
|
|
Str("MsgBlockNum", headerObj.Number.String()).
|
|
Int("Num of VRF", consensus.VdfSeedSize()).
|
|
Msg("[OnAnnounce] validated a new VDF")
|
|
|
|
} else {
|
|
consensus.getLogger().Warn().
|
|
Str("MsgBlockNum", headerObj.Number.String()).
|
|
Uint64("Epoch", headerObj.Epoch.Uint64()).
|
|
Int("Num of VRF", consensus.VdfSeedSize()).
|
|
Msg("[OnAnnounce] VDF proof is not valid")
|
|
return false
|
|
}
|
|
|
|
return true
|
|
}
|
|
|