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296 lines
10 KiB
296 lines
10 KiB
package node
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import (
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"encoding/binary"
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"errors"
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"github.com/ethereum/go-ethereum/common"
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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/block"
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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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bls_cosi "github.com/harmony-one/harmony/crypto/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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)
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// ProcessHeaderMessage verify and process Node/Header message into crosslink when it's valid
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func (node *Node) ProcessHeaderMessage(msgPayload []byte) {
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if node.NodeConfig.ShardID == 0 {
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var headers []*block.Header
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err := rlp.DecodeBytes(msgPayload, &headers)
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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("[ProcessingHeader] Crosslink Headers Broadcast Unable to Decode")
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return
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}
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// Try to reprocess all the pending cross links
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node.pendingClMutex.Lock()
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crossLinkHeadersToProcess := node.pendingCrossLinks
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node.pendingCrossLinks = []*block.Header{}
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node.pendingClMutex.Unlock()
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firstCrossLinkBlock := core.EpochFirstBlock(node.Blockchain().Config().CrossLinkEpoch)
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for _, header := range headers {
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if header.Number().Cmp(firstCrossLinkBlock) >= 0 {
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// Only process cross link starting from FirstCrossLinkBlock
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utils.Logger().Debug().Msgf("[ProcessHeaderMessage] Add Pending CrossLink, shardID %d, blockNum %d", header.ShardID(), header.Number())
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crossLinkHeadersToProcess = append(crossLinkHeadersToProcess, header)
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}
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}
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utils.Logger().Debug().
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Msgf("[ProcessingHeader] number of crosslink headers to propose %d, firstCrossLinkBlock %d", len(crossLinkHeadersToProcess), firstCrossLinkBlock)
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headersToQuque := []*block.Header{}
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for _, header := range crossLinkHeadersToProcess {
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if len(headersToQuque) > crossLinkBatchSize {
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break
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}
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exist, err := node.Blockchain().ReadCrossLink(header.ShardID(), header.Number().Uint64(), false)
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if err == nil && exist != nil {
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utils.Logger().Debug().
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Msgf("[ProcessingHeader] Cross Link already exists, pass. Block num: %d, shardID %d", header.Number(), header.ShardID())
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continue
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}
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if header.Number().Cmp(firstCrossLinkBlock) > 0 { // Directly trust the first cross-link
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// Sanity check on the previous link with the new link
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previousLink, err := node.Blockchain().ReadCrossLink(header.ShardID(), header.Number().Uint64()-1, false)
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if err != nil {
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previousLink, err = node.Blockchain().ReadCrossLink(header.ShardID(), header.Number().Uint64()-1, true)
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if err != nil {
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headersToQuque = append(headersToQuque, header)
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utils.Logger().Error().Err(err).
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Msgf("[ProcessingHeader] ReadCrossLink cannot read previousLink with number %d, shardID %d", header.Number().Uint64()-1, header.ShardID())
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continue
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}
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}
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err = node.VerifyCrosslinkHeader(previousLink.Header(), header)
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if err != nil {
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utils.Logger().Error().
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Err(err).
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Msgf("[ProcessingHeader] Failed to verify new cross link header for shardID %d, blockNum %d", header.ShardID(), header.Number())
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continue
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}
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}
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crossLink := types.NewCrossLink(header)
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utils.Logger().Debug().
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Msgf("[ProcessingHeader] committing for shardID %d, blockNum %d", header.ShardID(), header.Number().Uint64())
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node.Blockchain().WriteCrossLinks(types.CrossLinks{crossLink}, true)
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}
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// Queue up the cross links that's in the future
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node.pendingClMutex.Lock()
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node.pendingCrossLinks = append(node.pendingCrossLinks, headersToQuque...)
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node.pendingClMutex.Unlock()
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}
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}
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func (node *Node) verifyIncomingReceipts(block *types.Block) error {
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m := make(map[common.Hash]bool)
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cxps := block.IncomingReceipts()
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for _, cxp := range cxps {
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if err := cxp.IsValidCXReceiptsProof(); err != nil {
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return ctxerror.New("[verifyIncomingReceipts] verification failed").WithCause(err)
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}
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if node.Blockchain().IsSpent(cxp) {
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return ctxerror.New("[verifyIncomingReceipts] Double Spent!")
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}
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hash := cxp.MerkleProof.BlockHash
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// ignore duplicated receipts
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if _, ok := m[hash]; ok {
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return ctxerror.New("[verifyIncomingReceipts] Double Spent!")
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}
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m[hash] = true
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if err := node.compareCrosslinkWithReceipts(cxp); err != nil {
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return err
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}
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}
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incomingReceiptHash := types.EmptyRootHash
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if len(cxps) > 0 {
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incomingReceiptHash = types.DeriveSha(cxps)
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}
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if incomingReceiptHash != block.Header().IncomingReceiptHash() {
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return ctxerror.New("[verifyIncomingReceipts] Invalid IncomingReceiptHash in block header")
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}
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return nil
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}
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func (node *Node) compareCrosslinkWithReceipts(cxp *types.CXReceiptsProof) error {
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var hash, outgoingReceiptHash common.Hash
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shardID := cxp.MerkleProof.ShardID
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blockNum := cxp.MerkleProof.BlockNum.Uint64()
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beaconChain := node.Beaconchain()
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if shardID == 0 {
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block := beaconChain.GetBlockByNumber(blockNum)
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if block == nil {
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return ctxerror.New("[compareCrosslinkWithReceipts] Cannot get beaconchain header", "blockNum", blockNum, "shardID", shardID)
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}
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hash = block.Hash()
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outgoingReceiptHash = block.OutgoingReceiptHash()
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} else {
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crossLink, err := beaconChain.ReadCrossLink(shardID, blockNum, false)
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if err != nil {
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return ctxerror.New("[compareCrosslinkWithReceipts] Cannot get crosslink", "blockNum", blockNum, "shardID", shardID).WithCause(err)
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}
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hash = crossLink.ChainHeader.Hash()
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outgoingReceiptHash = crossLink.ChainHeader.OutgoingReceiptHash()
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}
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// verify the source block hash is from a finalized block
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if hash == cxp.MerkleProof.BlockHash && outgoingReceiptHash == cxp.MerkleProof.CXReceiptHash {
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return nil
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}
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return ErrCrosslinkVerificationFail
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}
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// VerifyCrosslinkHeader verifies the header is valid against the prevHeader.
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func (node *Node) VerifyCrosslinkHeader(prevHeader, header *block.Header) error {
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// TODO: add fork choice rule
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parentHash := header.ParentHash()
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if prevHeader.Hash() != parentHash {
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return ctxerror.New("[CrossLink] Invalid cross link header - parent hash mismatch", "shardID", header.ShardID(), "blockNum", header.Number())
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}
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// Verify signature of the new cross link header
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shardState, err := node.Blockchain().ReadShardState(prevHeader.Epoch())
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committee := shardState.FindCommitteeByID(prevHeader.ShardID())
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if err != nil || committee == nil {
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return ctxerror.New("[CrossLink] Failed to read shard state for cross link header", "shardID", header.ShardID(), "blockNum", header.Number()).WithCause(err)
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}
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var committerKeys []*bls.PublicKey
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parseKeysSuccess := true
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for _, member := range committee.NodeList {
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committerKey := new(bls.PublicKey)
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err = member.BlsPublicKey.ToLibBLSPublicKey(committerKey)
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if err != nil {
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parseKeysSuccess = false
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break
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}
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committerKeys = append(committerKeys, committerKey)
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}
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if !parseKeysSuccess {
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return ctxerror.New("[CrossLink] cannot convert BLS public key", "shardID", header.ShardID(), "blockNum", header.Number()).WithCause(err)
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}
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if header.Number().Uint64() > 1 { // First block doesn't have last sig
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mask, err := bls_cosi.NewMask(committerKeys, nil)
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if err != nil {
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return ctxerror.New("cannot create group sig mask", "shardID", header.ShardID(), "blockNum", header.Number()).WithCause(err)
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}
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if err := mask.SetMask(header.LastCommitBitmap()); err != nil {
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return ctxerror.New("cannot set group sig mask bits", "shardID", header.ShardID(), "blockNum", header.Number()).WithCause(err)
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}
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aggSig := bls.Sign{}
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sig := header.LastCommitSignature()
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err = aggSig.Deserialize(sig[:])
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if err != nil {
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return ctxerror.New("unable to deserialize multi-signature from payload").WithCause(err)
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}
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blockNumBytes := make([]byte, 8)
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binary.LittleEndian.PutUint64(blockNumBytes, header.Number().Uint64()-1)
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commitPayload := append(blockNumBytes, parentHash[:]...)
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if !aggSig.VerifyHash(mask.AggregatePublic, commitPayload) {
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return ctxerror.New("Failed to verify the signature for cross link header ", "shardID", header.ShardID(), "blockNum", header.Number())
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}
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}
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return nil
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}
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// ProposeCrossLinkDataForBeaconchain propose cross links for beacon chain new block
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func (node *Node) ProposeCrossLinkDataForBeaconchain() (types.CrossLinks, error) {
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utils.Logger().Info().
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Uint64("blockNum", node.Blockchain().CurrentBlock().NumberU64()+1).
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Msg("Proposing cross links ...")
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curBlock := node.Blockchain().CurrentBlock()
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numShards := core.ShardingSchedule.InstanceForEpoch(curBlock.Header().Epoch()).NumShards()
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shardCrossLinks := make([]types.CrossLinks, numShards)
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firstCrossLinkBlock := core.EpochFirstBlock(node.Blockchain().Config().CrossLinkEpoch)
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for i := 0; i < int(numShards); i++ {
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curShardID := uint32(i)
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lastLink, err := node.Blockchain().ReadShardLastCrossLink(curShardID)
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lastLinkblockNum := firstCrossLinkBlock
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blockNumoffset := 0
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if err == nil && lastLink != nil {
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blockNumoffset = 1
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lastLinkblockNum = lastLink.BlockNum()
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}
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for true {
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link, err := node.Blockchain().ReadCrossLink(curShardID, lastLinkblockNum.Uint64()+uint64(blockNumoffset), true)
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if err != nil || link == nil {
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break
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}
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if link.BlockNum().Cmp(firstCrossLinkBlock) > 0 {
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if lastLink == nil {
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utils.Logger().Error().
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Err(err).
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Msgf("[CrossLink] Haven't received the first cross link %d", link.BlockNum().Uint64())
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break
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} else {
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err := node.VerifyCrosslinkHeader(lastLink.Header(), link.Header())
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if err != nil {
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utils.Logger().Error().
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Err(err).
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Msgf("[CrossLink] Failed verifying temp cross link %d", link.BlockNum().Uint64())
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break
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}
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}
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}
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shardCrossLinks[i] = append(shardCrossLinks[i], *link)
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lastLink = link
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blockNumoffset++
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}
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}
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crossLinksToPropose := types.CrossLinks{}
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for _, crossLinks := range shardCrossLinks {
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crossLinksToPropose = append(crossLinksToPropose, crossLinks...)
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}
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if len(crossLinksToPropose) != 0 {
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crossLinksToPropose.Sort()
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return crossLinksToPropose, nil
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}
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return types.CrossLinks{}, errors.New("No cross link to propose")
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}
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// ProcessReceiptMessage store the receipts and merkle proof in local data store
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func (node *Node) ProcessReceiptMessage(msgPayload []byte) {
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cxp := types.CXReceiptsProof{}
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if err := rlp.DecodeBytes(msgPayload, &cxp); err != nil {
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utils.Logger().Error().Err(err).Msg("[ProcessReceiptMessage] Unable to Decode message Payload")
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return
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}
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if err := cxp.IsValidCXReceiptsProof(); err != nil {
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utils.Logger().Error().Err(err).Msg("[ProcessReceiptMessage] Invalid CXReceiptsProof")
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return
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}
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utils.Logger().Debug().Interface("cxp", cxp).Msg("[ProcessReceiptMessage] Add CXReceiptsProof to pending Receipts")
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// TODO: integrate with txpool
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node.AddPendingReceipts(&cxp)
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}
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