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534 lines
18 KiB
534 lines
18 KiB
package node
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import (
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"bytes"
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"context"
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"math/big"
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"math/rand"
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"sync/atomic"
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"time"
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"github.com/ethereum/go-ethereum/crypto"
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"github.com/ethereum/go-ethereum/rlp"
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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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proto_discovery "github.com/harmony-one/harmony/api/proto/discovery"
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proto_node "github.com/harmony-one/harmony/api/proto/node"
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"github.com/harmony-one/harmony/block"
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"github.com/harmony-one/harmony/core/types"
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nodeconfig "github.com/harmony-one/harmony/internal/configs/node"
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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/msgq"
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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/harmony/shard"
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staking "github.com/harmony-one/harmony/staking/types"
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libp2p_peer "github.com/libp2p/go-libp2p-core/peer"
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)
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const (
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consensusTimeout = 30 * time.Second
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crossLinkBatchSize = 7
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)
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// receiveGroupMessage use libp2p pubsub mechanism to receive broadcast messages
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func (node *Node) receiveGroupMessage(
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receiver p2p.GroupReceiver, rxQueue msgq.MessageAdder,
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) {
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ctx := context.Background()
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// TODO ek – infinite loop; add shutdown/cleanup logic
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for {
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msg, sender, err := receiver.Receive(ctx)
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if err != nil {
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utils.Logger().Warn().Err(err).
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Msg("cannot receive from group")
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continue
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}
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if sender == node.host.GetID() {
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continue
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}
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//utils.Logger().Info("[PUBSUB]", "received group msg", len(msg), "sender", sender)
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// skip the first 5 bytes, 1 byte is p2p type, 4 bytes are message size
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if err := rxQueue.AddMessage(msg[5:], sender); err != nil {
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utils.Logger().Warn().Err(err).
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Str("sender", sender.Pretty()).
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Msg("cannot enqueue incoming message for processing")
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}
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}
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}
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// HandleMessage parses the message and dispatch the actions.
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func (node *Node) HandleMessage(content []byte, sender libp2p_peer.ID) {
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msgCategory, err := proto.GetMessageCategory(content)
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if err != nil {
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utils.Logger().Error().
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Err(err).
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Msg("HandleMessage get message category failed")
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return
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}
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msgType, err := proto.GetMessageType(content)
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if err != nil {
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utils.Logger().Error().
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Err(err).
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Msg("HandleMessage get message type failed")
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return
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}
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msgPayload, err := proto.GetMessagePayload(content)
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if err != nil {
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utils.Logger().Error().
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Err(err).
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Msg("HandleMessage get message payload failed")
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return
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}
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switch msgCategory {
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case proto.Consensus:
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msgPayload, _ := proto.GetConsensusMessagePayload(content)
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if node.NodeConfig.Role() == nodeconfig.ExplorerNode {
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node.ExplorerMessageHandler(msgPayload)
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} else {
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node.ConsensusMessageHandler(msgPayload)
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}
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case proto.DRand:
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msgPayload, _ := proto.GetDRandMessagePayload(content)
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if node.DRand != nil {
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if node.DRand.IsLeader {
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node.DRand.ProcessMessageLeader(msgPayload)
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} else {
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node.DRand.ProcessMessageValidator(msgPayload)
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}
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}
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case proto.Node:
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actionType := proto_node.MessageType(msgType)
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switch actionType {
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case proto_node.Transaction:
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utils.Logger().Debug().Msg("NET: received message: Node/Transaction")
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node.transactionMessageHandler(msgPayload)
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case proto_node.Staking:
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utils.Logger().Debug().Msg("NET: received message: Node/Staking")
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node.stakingMessageHandler(msgPayload)
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case proto_node.Block:
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utils.Logger().Debug().Msg("NET: received message: Node/Block")
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blockMsgType := proto_node.BlockMessageType(msgPayload[0])
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switch blockMsgType {
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case proto_node.Sync:
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utils.Logger().Debug().Msg("NET: received message: Node/Sync")
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var blocks []*types.Block
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err := rlp.DecodeBytes(msgPayload[1:], &blocks)
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if err != nil {
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utils.Logger().Error().
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Err(err).
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Msg("block sync")
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} else {
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// for non-beaconchain node, subscribe to beacon block broadcast
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if node.Blockchain().ShardID() != 0 {
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for _, block := range blocks {
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if block.ShardID() == 0 {
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utils.Logger().Info().
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Uint64("block", blocks[0].NumberU64()).
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Msgf("Beacon block being handled by block channel: %d", block.NumberU64())
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node.BeaconBlockChannel <- block
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}
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}
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}
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if node.Client != nil && node.Client.UpdateBlocks != nil && blocks != nil {
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utils.Logger().Info().Msg("Block being handled by client")
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node.Client.UpdateBlocks(blocks)
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}
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}
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case proto_node.CrossLink:
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// only beacon chain will accept the header from other shards
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utils.Logger().Debug().Uint32("shardID", node.NodeConfig.ShardID).Msg("NET: received message: Node/CrossLink")
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if node.NodeConfig.ShardID != 0 {
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return
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}
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node.ProcessCrossLinkMessage(msgPayload[1:]) // skip first byte which is blockMsgType
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case proto_node.Receipt:
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utils.Logger().Debug().Msg("NET: received message: Node/Receipt")
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node.ProcessReceiptMessage(msgPayload[1:]) // skip first byte which is blockMsgType
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}
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case proto_node.PING:
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node.pingMessageHandler(msgPayload, sender)
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}
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default:
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utils.Logger().Error().
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Str("Unknown MsgCateogry", string(msgCategory))
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}
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}
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func (node *Node) transactionMessageHandler(msgPayload []byte) {
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txMessageType := proto_node.TransactionMessageType(msgPayload[0])
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switch txMessageType {
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case proto_node.Send:
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txs := types.Transactions{}
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err := rlp.Decode(bytes.NewReader(msgPayload[1:]), &txs) // skip the Send messge type
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if err != nil {
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utils.Logger().Error().
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Err(err).
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Msg("Failed to deserialize transaction list")
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return
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}
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node.addPendingTransactions(txs)
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}
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}
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func (node *Node) stakingMessageHandler(msgPayload []byte) {
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txMessageType := proto_node.TransactionMessageType(msgPayload[0])
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switch txMessageType {
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case proto_node.Send:
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txs := staking.StakingTransactions{}
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err := rlp.Decode(bytes.NewReader(msgPayload[1:]), &txs) // skip the Send messge type
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if err != nil {
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utils.Logger().Error().
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Err(err).
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Msg("Failed to deserialize staking transaction list")
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return
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}
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node.addPendingStakingTransactions(txs)
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}
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}
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// BroadcastNewBlock is called by consensus leader to sync new blocks with other clients/nodes.
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// NOTE: For now, just send to the client (basically not broadcasting)
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// TODO (lc): broadcast the new blocks to new nodes doing state sync
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func (node *Node) BroadcastNewBlock(newBlock *types.Block) {
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groups := []nodeconfig.GroupID{node.NodeConfig.GetClientGroupID()}
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utils.Logger().Info().Msgf("broadcasting new block %d, group %s", newBlock.NumberU64(), groups[0])
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msg := host.ConstructP2pMessage(byte(0), proto_node.ConstructBlocksSyncMessage([]*types.Block{newBlock}))
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if err := node.host.SendMessageToGroups(groups, msg); err != nil {
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utils.Logger().Warn().Err(err).Msg("cannot broadcast new block")
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}
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}
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// BroadcastCrossLink is called by consensus leader to send the new header as cross link to beacon chain.
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func (node *Node) BroadcastCrossLink(newBlock *types.Block) {
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utils.Logger().Info().Msgf("Construct and Broadcasting new crosslink to beacon chain groupID %s", nodeconfig.NewGroupIDByShardID(0))
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headers := []*block.Header{}
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lastLink, err := node.Beaconchain().ReadShardLastCrossLink(newBlock.ShardID())
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var latestBlockNum uint64
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// TODO chao: record the missing crosslink in local database instead of using latest crosslink
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// if cannot find latest crosslink, broadcast latest 3 block headers
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if err != nil {
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utils.Logger().Debug().Err(err).Msg("[BroadcastCrossLink] ReadShardLastCrossLink Failed")
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header := node.Blockchain().GetHeaderByNumber(newBlock.NumberU64() - 2)
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if header != nil {
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headers = append(headers, header)
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}
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header = node.Blockchain().GetHeaderByNumber(newBlock.NumberU64() - 1)
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if header != nil {
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headers = append(headers, header)
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}
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headers = append(headers, newBlock.Header())
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} else {
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latestBlockNum = lastLink.BlockNum()
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for blockNum := latestBlockNum + 1; blockNum <= newBlock.NumberU64(); blockNum++ {
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if blockNum > latestBlockNum+crossLinkBatchSize {
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break
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}
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header := node.Blockchain().GetHeaderByNumber(blockNum)
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if header != nil {
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headers = append(headers, header)
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}
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}
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}
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utils.Logger().Info().Msgf("[BroadcastCrossLink] Broadcasting Block Headers, latestBlockNum %d, currentBlockNum %d, Number of Headers %d", latestBlockNum, newBlock.NumberU64(), len(headers))
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for _, header := range headers {
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utils.Logger().Debug().Msgf("[BroadcastCrossLink] Broadcasting %d", header.Number().Uint64())
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}
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node.host.SendMessageToGroups([]nodeconfig.GroupID{nodeconfig.NewGroupIDByShardID(0)}, host.ConstructP2pMessage(byte(0), proto_node.ConstructCrossLinkMessage(node.Consensus.ChainReader, headers)))
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}
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// VerifyNewBlock is called by consensus participants to verify the block (account model) they are running consensus on
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func (node *Node) VerifyNewBlock(newBlock *types.Block) error {
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// TODO ek – where do we verify parent-child invariants,
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// e.g. "child.Number == child.IsGenesis() ? 0 : parent.Number+1"?
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err := node.Blockchain().Validator().ValidateHeader(newBlock, true)
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if err != nil {
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utils.Logger().Error().
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Str("blockHash", newBlock.Hash().Hex()).
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Err(err).
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Msg("cannot ValidateHeader for the new block")
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return ctxerror.New("cannot ValidateHeader for the new block", "blockHash", newBlock.Hash()).WithCause(err)
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}
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if newBlock.ShardID() != node.Blockchain().ShardID() {
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utils.Logger().Error().
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Uint32("my shard ID", node.Blockchain().ShardID()).
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Uint32("new block's shard ID", newBlock.ShardID()).
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Msg("wrong shard ID")
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return ctxerror.New("wrong shard ID",
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"my shard ID", node.Blockchain().ShardID(),
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"new block's shard ID", newBlock.ShardID())
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}
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err = node.Blockchain().ValidateNewBlock(newBlock)
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if err != nil {
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utils.Logger().Error().
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Str("blockHash", newBlock.Hash().Hex()).
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Int("numTx", len(newBlock.Transactions())).
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Err(err).
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Msg("cannot ValidateNewBlock")
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return ctxerror.New("cannot ValidateNewBlock",
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"blockHash", newBlock.Hash(),
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"numTx", len(newBlock.Transactions()),
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).WithCause(err)
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}
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// Verify cross links
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// TODO: move into ValidateNewBlock
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if node.NodeConfig.ShardID == 0 {
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err := node.VerifyBlockCrossLinks(newBlock)
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if err != nil {
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utils.Logger().Debug().Err(err).Msg("ops2 VerifyBlockCrossLinks Failed")
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return err
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}
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}
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// TODO: move into ValidateNewBlock
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err = node.verifyIncomingReceipts(newBlock)
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if err != nil {
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utils.Logger().Error().
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Str("blockHash", newBlock.Hash().Hex()).
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Int("numIncomingReceipts", len(newBlock.IncomingReceipts())).
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Err(err).
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Msg("[VerifyNewBlock] Cannot ValidateNewBlock")
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return ctxerror.New("[VerifyNewBlock] Cannot ValidateNewBlock", "blockHash", newBlock.Hash(),
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"numIncomingReceipts", len(newBlock.IncomingReceipts())).WithCause(err)
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}
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// TODO: verify the vrf randomness
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// _ = newBlock.Header().Vrf
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// TODO: uncomment 4 lines after we finish staking mechanism
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//err = node.validateNewShardState(newBlock, &node.CurrentStakes)
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// if err != nil {
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// return ctxerror.New("failed to verify sharding state").WithCause(err)
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// }
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return nil
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}
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// BigMaxUint64 is maximum possible uint64 value, that is, (1**64)-1.
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var BigMaxUint64 = new(big.Int).SetBytes([]byte{
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255, 255, 255, 255, 255, 255, 255, 255,
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})
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// PostConsensusProcessing is called by consensus participants, after consensus is done, to:
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// 1. add the new block to blockchain
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// 2. [leader] send new block to the client
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// 3. [leader] send cross shard tx receipts to destination shard
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func (node *Node) PostConsensusProcessing(newBlock *types.Block, commitSigAndBitmap []byte) {
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if err := node.AddNewBlock(newBlock); err != nil {
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utils.Logger().Error().
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Err(err).
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Msg("Error when adding new block")
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return
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}
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// Update last consensus time for metrics
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// TODO: randomly selected a few validators to broadcast messages instead of only leader broadcast
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// TODO: refactor the asynchronous calls to separate go routine.
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node.lastConsensusTime = time.Now().Unix()
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if node.Consensus.PubKey.IsEqual(node.Consensus.LeaderPubKey) {
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if node.NodeConfig.ShardID == 0 {
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node.BroadcastNewBlock(newBlock)
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}
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if node.NodeConfig.ShardID != shard.BeaconChainShardID && newBlock.Epoch().Cmp(node.Blockchain().Config().CrossLinkEpoch) >= 0 {
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node.BroadcastCrossLink(newBlock)
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}
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node.BroadcastCXReceipts(newBlock, commitSigAndBitmap)
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} else {
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utils.Logger().Info().
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Uint64("blockNum", newBlock.NumberU64()).
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Uint64("epochNum", newBlock.Epoch().Uint64()).
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Uint64("ViewId", newBlock.Header().ViewID().Uint64()).
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Str("blockHash", newBlock.Hash().String()).
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Int("numTxns", len(newBlock.Transactions())).
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Int("numStakingTxns", len(newBlock.StakingTransactions())).
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Msg("BINGO !!! Reached Consensus")
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// 15% of the validator also need to do broadcasting
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rand.Seed(time.Now().UTC().UnixNano())
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rnd := rand.Intn(100)
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if rnd < 15 {
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node.BroadcastCXReceipts(newBlock, commitSigAndBitmap)
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}
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}
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// Broadcast client requested missing cross shard receipts if there is any
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node.BroadcastMissingCXReceipts()
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// Update consensus keys at last so the change of leader status doesn't mess up normal flow
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if len(newBlock.Header().ShardState()) > 0 {
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node.Consensus.UpdateConsensusInformation()
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}
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// TODO chao: uncomment this after beacon syncing is stable
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// node.Blockchain().UpdateCXReceiptsCheckpointsByBlock(newBlock)
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if node.NodeConfig.GetNetworkType() != nodeconfig.Mainnet {
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// Update contract deployer's nonce so default contract like faucet can issue transaction with current nonce
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nonce := node.GetNonceOfAddress(crypto.PubkeyToAddress(node.ContractDeployerKey.PublicKey))
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atomic.StoreUint64(&node.ContractDeployerCurrentNonce, nonce)
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for _, tx := range newBlock.Transactions() {
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msg, err := tx.AsMessage(types.HomesteadSigner{})
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if err != nil {
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utils.Logger().Error().Msg("Error when parsing tx into message")
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}
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if _, ok := node.AddressNonce.Load(msg.From()); ok {
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nonce := node.GetNonceOfAddress(msg.From())
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node.AddressNonce.Store(msg.From(), nonce)
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}
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}
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// TODO: Enable the following after v0
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if node.Consensus.ShardID == 0 {
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// TODO: enable drand only for beacon chain
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// ConfirmedBlockChannel which is listened by drand leader who will initiate DRG if its a epoch block (first block of a epoch)
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//if node.DRand != nil {
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// go func() {
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// node.ConfirmedBlockChannel <- newBlock
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// }()
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//}
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}
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}
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}
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// AddNewBlock is usedd to add new block into the blockchain.
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func (node *Node) AddNewBlock(newBlock *types.Block) error {
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_, err := node.Blockchain().InsertChain([]*types.Block{newBlock}, true /* verifyHeaders */)
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// Debug only
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//addrs, err := node.Blockchain().ReadValidatorList()
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//utils.Logger().Debug().Msgf("validator list updated, err=%v, len(addrs)=%v", err, len(addrs))
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//for i, addr := range addrs {
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// val, err := node.Blockchain().ValidatorInformation(addr)
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// if err != nil {
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// utils.Logger().Debug().Msgf("ValidatorInformation Error %v: err %v", i, err)
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// }
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// utils.Logger().Debug().Msgf("ValidatorInformation %v: %v", i, val)
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//}
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//currAddrs, err := node.Blockchain().ReadActiveValidatorList()
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//utils.Logger().Debug().Msgf("CurrentValidators : %v", currAddrs)
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//candidates := node.Blockchain().ValidatorCandidates()
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//utils.Logger().Debug().Msgf("CandidateValidators : %v", candidates)
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// Finish debug
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if err != nil {
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utils.Logger().Error().
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Err(err).
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Uint64("blockNum", newBlock.NumberU64()).
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Str("parentHash", newBlock.Header().ParentHash().Hex()).
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Str("hash", newBlock.Header().Hash().Hex()).
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Msg("Error Adding new block to blockchain")
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} else {
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utils.Logger().Info().
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Uint64("blockNum", newBlock.NumberU64()).
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Str("hash", newBlock.Header().Hash().Hex()).
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Msg("Added New Block to Blockchain!!!")
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}
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return err
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}
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func (node *Node) pingMessageHandler(msgPayload []byte, sender libp2p_peer.ID) int {
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ping, err := proto_discovery.GetPingMessage(msgPayload)
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if err != nil {
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utils.Logger().Error().
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Err(err).
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Msg("Can't get Ping Message")
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return -1
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}
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peer := new(p2p.Peer)
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peer.IP = ping.Node.IP
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peer.Port = ping.Node.Port
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peer.PeerID = ping.Node.PeerID
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peer.ConsensusPubKey = nil
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if ping.Node.PubKey != nil {
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peer.ConsensusPubKey = &bls.PublicKey{}
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if err := peer.ConsensusPubKey.Deserialize(ping.Node.PubKey[:]); err != nil {
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utils.Logger().Error().
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Err(err).
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Msg("UnmarshalBinary Failed")
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return -1
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}
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}
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utils.Logger().Debug().
|
|
Str("Version", ping.NodeVer).
|
|
Str("BlsKey", peer.ConsensusPubKey.SerializeToHexStr()).
|
|
Str("IP", peer.IP).
|
|
Str("Port", peer.Port).
|
|
Interface("PeerID", peer.PeerID).
|
|
Msg("[PING] PeerInfo")
|
|
|
|
senderStr := string(sender)
|
|
if senderStr != "" {
|
|
_, ok := node.duplicatedPing.LoadOrStore(senderStr, true)
|
|
if ok {
|
|
// duplicated ping message return
|
|
return 0
|
|
}
|
|
}
|
|
|
|
// add to incoming peer list
|
|
//node.host.AddIncomingPeer(*peer)
|
|
node.host.ConnectHostPeer(*peer)
|
|
|
|
if ping.Node.Role != proto_node.ClientRole {
|
|
node.AddPeers([]*p2p.Peer{peer})
|
|
utils.Logger().Info().
|
|
Str("Peer", peer.String()).
|
|
Int("# Peers", node.numPeers).
|
|
Msg("Add Peer to Node")
|
|
}
|
|
|
|
return 1
|
|
}
|
|
|
|
// bootstrapConsensus is the a goroutine to check number of peers and start the consensus
|
|
func (node *Node) bootstrapConsensus() {
|
|
tick := time.NewTicker(5 * time.Second)
|
|
defer tick.Stop()
|
|
lastPeerNum := node.numPeers
|
|
for {
|
|
select {
|
|
case <-tick.C:
|
|
numPeersNow := node.numPeers
|
|
// no peers, wait for another tick
|
|
if numPeersNow == 0 {
|
|
utils.Logger().Info().
|
|
Int("numPeersNow", numPeersNow).
|
|
Msg("No peers, continue")
|
|
continue
|
|
} else if numPeersNow > lastPeerNum {
|
|
utils.Logger().Info().
|
|
Int("previousNumPeers", lastPeerNum).
|
|
Int("numPeersNow", numPeersNow).
|
|
Int("targetNumPeers", node.Consensus.MinPeers).
|
|
Msg("New peers increased")
|
|
lastPeerNum = numPeersNow
|
|
}
|
|
|
|
if numPeersNow >= node.Consensus.MinPeers {
|
|
utils.Logger().Info().Msg("[bootstrap] StartConsensus")
|
|
node.startConsensus <- struct{}{}
|
|
return
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
// ConsensusMessageHandler passes received message in node_handler to consensus
|
|
func (node *Node) ConsensusMessageHandler(msgPayload []byte) {
|
|
node.Consensus.MsgChan <- msgPayload
|
|
}
|
|
|