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656 lines
20 KiB
656 lines
20 KiB
package state
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import (
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"context"
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"fmt"
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"time"
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abci "github.com/tendermint/tendermint/abci/types"
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"github.com/tendermint/tendermint/crypto/encoding"
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"github.com/tendermint/tendermint/internal/eventbus"
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"github.com/tendermint/tendermint/internal/mempool"
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"github.com/tendermint/tendermint/internal/proxy"
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"github.com/tendermint/tendermint/libs/log"
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tmstate "github.com/tendermint/tendermint/proto/tendermint/state"
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tmtypes "github.com/tendermint/tendermint/proto/tendermint/types"
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"github.com/tendermint/tendermint/types"
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)
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//-----------------------------------------------------------------------------
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// BlockExecutor handles block execution and state updates.
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// It exposes ApplyBlock(), which validates & executes the block, updates state w/ ABCI responses,
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// then commits and updates the mempool atomically, then saves state.
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// BlockExecutor provides the context and accessories for properly executing a block.
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type BlockExecutor struct {
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// save state, validators, consensus params, abci responses here
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store Store
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// use blockstore for the pruning functions.
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blockStore BlockStore
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// execute the app against this
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proxyApp proxy.AppConnConsensus
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// events
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eventBus types.BlockEventPublisher
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// manage the mempool lock during commit
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// and update both with block results after commit.
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mempool mempool.Mempool
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evpool EvidencePool
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logger log.Logger
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metrics *Metrics
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// cache the verification results over a single height
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cache map[string]struct{}
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}
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type BlockExecutorOption func(executor *BlockExecutor)
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func BlockExecutorWithMetrics(metrics *Metrics) BlockExecutorOption {
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return func(blockExec *BlockExecutor) {
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blockExec.metrics = metrics
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}
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}
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// NewBlockExecutor returns a new BlockExecutor with a NopEventBus.
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// Call SetEventBus to provide one.
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func NewBlockExecutor(
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stateStore Store,
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logger log.Logger,
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proxyApp proxy.AppConnConsensus,
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pool mempool.Mempool,
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evpool EvidencePool,
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blockStore BlockStore,
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options ...BlockExecutorOption,
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) *BlockExecutor {
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res := &BlockExecutor{
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store: stateStore,
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proxyApp: proxyApp,
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eventBus: eventbus.NopEventBus{},
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mempool: pool,
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evpool: evpool,
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logger: logger,
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metrics: NopMetrics(),
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cache: make(map[string]struct{}),
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blockStore: blockStore,
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}
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for _, option := range options {
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option(res)
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}
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return res
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}
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func (blockExec *BlockExecutor) Store() Store {
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return blockExec.store
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}
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// SetEventBus - sets the event bus for publishing block related events.
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// If not called, it defaults to types.NopEventBus.
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func (blockExec *BlockExecutor) SetEventBus(eventBus types.BlockEventPublisher) {
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blockExec.eventBus = eventBus
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}
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// CreateProposalBlock calls state.MakeBlock with evidence from the evpool
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// and txs from the mempool. The max bytes must be big enough to fit the commit.
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// Up to 1/10th of the block space is allcoated for maximum sized evidence.
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// The rest is given to txs, up to the max gas.
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//
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// Contract: application will not return more bytes than are sent over the wire.
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func (blockExec *BlockExecutor) CreateProposalBlock(
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ctx context.Context,
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height int64,
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state State, commit *types.Commit,
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proposerAddr []byte,
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votes []*types.Vote,
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) (*types.Block, *types.PartSet, error) {
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maxBytes := state.ConsensusParams.Block.MaxBytes
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maxGas := state.ConsensusParams.Block.MaxGas
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evidence, evSize := blockExec.evpool.PendingEvidence(state.ConsensusParams.Evidence.MaxBytes)
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// Fetch a limited amount of valid txs
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maxDataBytes := types.MaxDataBytes(maxBytes, evSize, state.Validators.Size())
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txs := blockExec.mempool.ReapMaxBytesMaxGas(maxDataBytes, maxGas)
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preparedProposal, err := blockExec.proxyApp.PrepareProposal(
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ctx,
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abci.RequestPrepareProposal{
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BlockData: txs.ToSliceOfBytes(),
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BlockDataSize: maxDataBytes,
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Votes: types.VotesToProto(votes),
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},
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)
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if err != nil {
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// The App MUST ensure that only valid (and hence 'processable') transactions
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// enter the mempool. Hence, at this point, we can't have any non-processable
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// transaction causing an error.
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//
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// Also, the App can simply skip any transaction that could cause any kind of trouble.
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// Either way, we can not recover in a meaningful way, unless we skip proposing
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// this block, repair what caused the error and try again. Hence, we panic on
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// purpose for now.
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panic(err)
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}
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newTxs := preparedProposal.GetBlockData()
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var txSize int
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for _, tx := range newTxs {
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txSize += len(tx)
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if maxDataBytes < int64(txSize) {
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panic("block data exceeds max amount of allowed bytes")
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}
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}
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modifiedTxs := types.ToTxs(preparedProposal.GetBlockData())
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return state.MakeBlock(height, modifiedTxs, commit, evidence, proposerAddr)
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}
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func (blockExec *BlockExecutor) ProcessProposal(
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ctx context.Context,
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block *types.Block,
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state State,
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) (bool, error) {
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req := abci.RequestProcessProposal{
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Hash: block.Header.Hash(),
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Header: *block.Header.ToProto(),
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Txs: block.Data.Txs.ToSliceOfBytes(),
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ProposedLastCommit: buildLastCommitInfo(block, blockExec.store, state.InitialHeight),
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ByzantineValidators: block.Evidence.ToABCI(),
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}
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resp, err := blockExec.proxyApp.ProcessProposal(ctx, req)
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if err != nil {
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return false, ErrInvalidBlock(err)
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}
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return resp.Accept, nil
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}
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// ValidateBlock validates the given block against the given state.
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// If the block is invalid, it returns an error.
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// Validation does not mutate state, but does require historical information from the stateDB,
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// ie. to verify evidence from a validator at an old height.
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func (blockExec *BlockExecutor) ValidateBlock(ctx context.Context, state State, block *types.Block) error {
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hash := block.Hash()
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if _, ok := blockExec.cache[hash.String()]; ok {
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return nil
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}
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err := validateBlock(state, block)
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if err != nil {
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return err
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}
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err = blockExec.evpool.CheckEvidence(ctx, block.Evidence)
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if err != nil {
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return err
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}
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blockExec.cache[hash.String()] = struct{}{}
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return nil
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}
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// ApplyBlock validates the block against the state, executes it against the app,
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// fires the relevant events, commits the app, and saves the new state and responses.
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// It returns the new state.
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// It's the only function that needs to be called
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// from outside this package to process and commit an entire block.
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// It takes a blockID to avoid recomputing the parts hash.
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func (blockExec *BlockExecutor) ApplyBlock(
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ctx context.Context,
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state State,
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blockID types.BlockID, block *types.Block) (State, error) {
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// validate the block if we haven't already
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if err := blockExec.ValidateBlock(ctx, state, block); err != nil {
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return state, ErrInvalidBlock(err)
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}
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startTime := time.Now().UnixNano()
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pbh := block.Header.ToProto()
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finalizeBlockResponse, err := blockExec.proxyApp.FinalizeBlock(
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ctx,
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abci.RequestFinalizeBlock{
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Hash: block.Hash(),
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Header: *pbh,
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Txs: block.Txs.ToSliceOfBytes(),
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DecidedLastCommit: buildLastCommitInfo(block, blockExec.store, state.InitialHeight),
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ByzantineValidators: block.Evidence.ToABCI(),
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},
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)
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endTime := time.Now().UnixNano()
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blockExec.metrics.BlockProcessingTime.Observe(float64(endTime-startTime) / 1000000)
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if err != nil {
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return state, ErrProxyAppConn(err)
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}
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abciResponses := &tmstate.ABCIResponses{
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FinalizeBlock: finalizeBlockResponse,
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}
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// Save the results before we commit.
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if err := blockExec.store.SaveABCIResponses(block.Height, abciResponses); err != nil {
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return state, err
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}
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// validate the validator updates and convert to tendermint types
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err = validateValidatorUpdates(finalizeBlockResponse.ValidatorUpdates, state.ConsensusParams.Validator)
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if err != nil {
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return state, fmt.Errorf("error in validator updates: %w", err)
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}
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validatorUpdates, err := types.PB2TM.ValidatorUpdates(finalizeBlockResponse.ValidatorUpdates)
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if err != nil {
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return state, err
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}
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if len(validatorUpdates) > 0 {
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blockExec.logger.Debug("updates to validators", "updates", types.ValidatorListString(validatorUpdates))
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}
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// Update the state with the block and responses.
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state, err = state.Update(blockID, &block.Header, ABCIResponsesResultsHash(abciResponses), finalizeBlockResponse.ConsensusParamUpdates, validatorUpdates)
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if err != nil {
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return state, fmt.Errorf("commit failed for application: %w", err)
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}
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// Lock mempool, commit app state, update mempoool.
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appHash, retainHeight, err := blockExec.Commit(ctx, state, block, finalizeBlockResponse.TxResults)
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if err != nil {
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return state, fmt.Errorf("commit failed for application: %w", err)
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}
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// Update evpool with the latest state.
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blockExec.evpool.Update(ctx, state, block.Evidence)
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// Update the app hash and save the state.
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state.AppHash = appHash
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if err := blockExec.store.Save(state); err != nil {
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return state, err
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}
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// Prune old heights, if requested by ABCI app.
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if retainHeight > 0 {
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pruned, err := blockExec.pruneBlocks(retainHeight)
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if err != nil {
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blockExec.logger.Error("failed to prune blocks", "retain_height", retainHeight, "err", err)
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} else {
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blockExec.logger.Debug("pruned blocks", "pruned", pruned, "retain_height", retainHeight)
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}
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}
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// reset the verification cache
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blockExec.cache = make(map[string]struct{})
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// Events are fired after everything else.
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// NOTE: if we crash between Commit and Save, events wont be fired during replay
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fireEvents(ctx, blockExec.logger, blockExec.eventBus, block, blockID, finalizeBlockResponse, validatorUpdates)
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return state, nil
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}
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func (blockExec *BlockExecutor) ExtendVote(ctx context.Context, vote *types.Vote) (types.VoteExtension, error) {
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req := abci.RequestExtendVote{
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Vote: vote.ToProto(),
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}
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resp, err := blockExec.proxyApp.ExtendVote(ctx, req)
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if err != nil {
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return types.VoteExtension{}, err
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}
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return types.VoteExtensionFromProto(resp.VoteExtension), nil
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}
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func (blockExec *BlockExecutor) VerifyVoteExtension(ctx context.Context, vote *types.Vote) error {
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req := abci.RequestVerifyVoteExtension{
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Vote: vote.ToProto(),
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}
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resp, err := blockExec.proxyApp.VerifyVoteExtension(ctx, req)
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if err != nil {
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return err
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}
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if resp.IsErr() {
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return types.ErrVoteInvalidExtension
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}
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return nil
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}
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// Commit locks the mempool, runs the ABCI Commit message, and updates the
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// mempool.
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// It returns the result of calling abci.Commit (the AppHash) and the height to retain (if any).
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// The Mempool must be locked during commit and update because state is
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// typically reset on Commit and old txs must be replayed against committed
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// state before new txs are run in the mempool, lest they be invalid.
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func (blockExec *BlockExecutor) Commit(
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ctx context.Context,
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state State,
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block *types.Block,
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txResults []*abci.ExecTxResult,
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) ([]byte, int64, error) {
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blockExec.mempool.Lock()
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defer blockExec.mempool.Unlock()
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// while mempool is Locked, flush to ensure all async requests have completed
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// in the ABCI app before Commit.
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err := blockExec.mempool.FlushAppConn(ctx)
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if err != nil {
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blockExec.logger.Error("client error during mempool.FlushAppConn", "err", err)
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return nil, 0, err
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}
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// Commit block, get hash back
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res, err := blockExec.proxyApp.Commit(ctx)
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if err != nil {
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blockExec.logger.Error("client error during proxyAppConn.Commit", "err", err)
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return nil, 0, err
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}
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// ResponseCommit has no error code - just data
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blockExec.logger.Info(
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"committed state",
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"height", block.Height,
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"num_txs", len(block.Txs),
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"app_hash", fmt.Sprintf("%X", res.Data),
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)
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// Update mempool.
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err = blockExec.mempool.Update(
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ctx,
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block.Height,
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block.Txs,
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txResults,
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TxPreCheckForState(state),
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TxPostCheckForState(state),
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)
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return res.Data, res.RetainHeight, err
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}
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func buildLastCommitInfo(block *types.Block, store Store, initialHeight int64) abci.CommitInfo {
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if block.Height == initialHeight {
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// there is no last commmit for the initial height.
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// return an empty value.
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return abci.CommitInfo{}
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}
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lastValSet, err := store.LoadValidators(block.Height - 1)
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if err != nil {
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panic(err)
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}
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var (
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commitSize = block.LastCommit.Size()
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valSetLen = len(lastValSet.Validators)
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)
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// ensure that the size of the validator set in the last commit matches
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// the size of the validator set in the state store.
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if commitSize != valSetLen {
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panic(fmt.Sprintf(
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"commit size (%d) doesn't match validator set length (%d) at height %d\n\n%v\n\n%v",
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commitSize, valSetLen, block.Height, block.LastCommit.Signatures, lastValSet.Validators,
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))
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}
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votes := make([]abci.VoteInfo, block.LastCommit.Size())
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for i, val := range lastValSet.Validators {
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commitSig := block.LastCommit.Signatures[i]
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votes[i] = abci.VoteInfo{
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Validator: types.TM2PB.Validator(val),
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SignedLastBlock: !commitSig.Absent(),
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}
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}
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return abci.CommitInfo{
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Round: block.LastCommit.Round,
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Votes: votes,
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}
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}
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func validateValidatorUpdates(abciUpdates []abci.ValidatorUpdate,
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params types.ValidatorParams) error {
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for _, valUpdate := range abciUpdates {
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if valUpdate.GetPower() < 0 {
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return fmt.Errorf("voting power can't be negative %v", valUpdate)
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} else if valUpdate.GetPower() == 0 {
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// continue, since this is deleting the validator, and thus there is no
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// pubkey to check
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continue
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}
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// Check if validator's pubkey matches an ABCI type in the consensus params
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pk, err := encoding.PubKeyFromProto(valUpdate.PubKey)
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if err != nil {
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return err
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}
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if !params.IsValidPubkeyType(pk.Type()) {
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return fmt.Errorf("validator %v is using pubkey %s, which is unsupported for consensus",
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valUpdate, pk.Type())
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}
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}
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return nil
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}
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// Update returns a copy of state with the fields set using the arguments passed in.
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func (state State) Update(
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blockID types.BlockID,
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header *types.Header,
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resultsHash []byte,
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consensusParamUpdates *tmtypes.ConsensusParams,
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validatorUpdates []*types.Validator,
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) (State, error) {
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// Copy the valset so we can apply changes from FinalizeBlock
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// and update s.LastValidators and s.Validators.
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nValSet := state.NextValidators.Copy()
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// Update the validator set with the latest abciResponses.
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lastHeightValsChanged := state.LastHeightValidatorsChanged
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if len(validatorUpdates) > 0 {
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err := nValSet.UpdateWithChangeSet(validatorUpdates)
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if err != nil {
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return state, fmt.Errorf("error changing validator set: %w", err)
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}
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// Change results from this height but only applies to the next next height.
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lastHeightValsChanged = header.Height + 1 + 1
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}
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// Update validator proposer priority and set state variables.
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nValSet.IncrementProposerPriority(1)
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// Update the params with the latest abciResponses.
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nextParams := state.ConsensusParams
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lastHeightParamsChanged := state.LastHeightConsensusParamsChanged
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if consensusParamUpdates != nil {
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// NOTE: must not mutate state.ConsensusParams
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nextParams = state.ConsensusParams.UpdateConsensusParams(consensusParamUpdates)
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err := nextParams.ValidateConsensusParams()
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if err != nil {
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return state, fmt.Errorf("error updating consensus params: %w", err)
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}
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state.Version.Consensus.App = nextParams.Version.AppVersion
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// Change results from this height but only applies to the next height.
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lastHeightParamsChanged = header.Height + 1
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}
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nextVersion := state.Version
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// NOTE: the AppHash and the VoteExtension has not been populated.
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// It will be filled on state.Save.
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return State{
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Version: nextVersion,
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ChainID: state.ChainID,
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InitialHeight: state.InitialHeight,
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LastBlockHeight: header.Height,
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LastBlockID: blockID,
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LastBlockTime: header.Time,
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NextValidators: nValSet,
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Validators: state.NextValidators.Copy(),
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LastValidators: state.Validators.Copy(),
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LastHeightValidatorsChanged: lastHeightValsChanged,
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ConsensusParams: nextParams,
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LastHeightConsensusParamsChanged: lastHeightParamsChanged,
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LastResultsHash: resultsHash,
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AppHash: nil,
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}, nil
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}
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// Fire NewBlock, NewBlockHeader.
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// Fire TxEvent for every tx.
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// NOTE: if Tendermint crashes before commit, some or all of these events may be published again.
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func fireEvents(
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ctx context.Context,
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logger log.Logger,
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eventBus types.BlockEventPublisher,
|
|
block *types.Block,
|
|
blockID types.BlockID,
|
|
finalizeBlockResponse *abci.ResponseFinalizeBlock,
|
|
validatorUpdates []*types.Validator,
|
|
) {
|
|
if err := eventBus.PublishEventNewBlock(ctx, types.EventDataNewBlock{
|
|
Block: block,
|
|
BlockID: blockID,
|
|
ResultFinalizeBlock: *finalizeBlockResponse,
|
|
}); err != nil {
|
|
logger.Error("failed publishing new block", "err", err)
|
|
}
|
|
|
|
if err := eventBus.PublishEventNewBlockHeader(ctx, types.EventDataNewBlockHeader{
|
|
Header: block.Header,
|
|
NumTxs: int64(len(block.Txs)),
|
|
ResultFinalizeBlock: *finalizeBlockResponse,
|
|
}); err != nil {
|
|
logger.Error("failed publishing new block header", "err", err)
|
|
}
|
|
|
|
if len(block.Evidence) != 0 {
|
|
for _, ev := range block.Evidence {
|
|
if err := eventBus.PublishEventNewEvidence(ctx, types.EventDataNewEvidence{
|
|
Evidence: ev,
|
|
Height: block.Height,
|
|
}); err != nil {
|
|
logger.Error("failed publishing new evidence", "err", err)
|
|
}
|
|
}
|
|
}
|
|
|
|
// sanity check
|
|
if len(finalizeBlockResponse.TxResults) != len(block.Data.Txs) {
|
|
panic(fmt.Sprintf("number of TXs (%d) and ABCI TX responses (%d) do not match",
|
|
len(block.Data.Txs), len(finalizeBlockResponse.TxResults)))
|
|
}
|
|
|
|
for i, tx := range block.Data.Txs {
|
|
if err := eventBus.PublishEventTx(ctx, types.EventDataTx{
|
|
TxResult: abci.TxResult{
|
|
Height: block.Height,
|
|
Index: uint32(i),
|
|
Tx: tx,
|
|
Result: *(finalizeBlockResponse.TxResults[i]),
|
|
},
|
|
}); err != nil {
|
|
logger.Error("failed publishing event TX", "err", err)
|
|
}
|
|
}
|
|
|
|
if len(finalizeBlockResponse.ValidatorUpdates) > 0 {
|
|
if err := eventBus.PublishEventValidatorSetUpdates(ctx,
|
|
types.EventDataValidatorSetUpdates{ValidatorUpdates: validatorUpdates}); err != nil {
|
|
logger.Error("failed publishing event", "err", err)
|
|
}
|
|
}
|
|
}
|
|
|
|
//----------------------------------------------------------------------------------------------------
|
|
// Execute block without state. TODO: eliminate
|
|
|
|
// ExecCommitBlock executes and commits a block on the proxyApp without validating or mutating the state.
|
|
// It returns the application root hash (result of abci.Commit).
|
|
func ExecCommitBlock(
|
|
ctx context.Context,
|
|
be *BlockExecutor,
|
|
appConnConsensus proxy.AppConnConsensus,
|
|
block *types.Block,
|
|
logger log.Logger,
|
|
store Store,
|
|
initialHeight int64,
|
|
s State,
|
|
) ([]byte, error) {
|
|
pbh := block.Header.ToProto()
|
|
finalizeBlockResponse, err := appConnConsensus.FinalizeBlock(
|
|
ctx,
|
|
abci.RequestFinalizeBlock{
|
|
Hash: block.Hash(),
|
|
Header: *pbh,
|
|
Txs: block.Txs.ToSliceOfBytes(),
|
|
DecidedLastCommit: buildLastCommitInfo(block, store, initialHeight),
|
|
ByzantineValidators: block.Evidence.ToABCI(),
|
|
},
|
|
)
|
|
|
|
if err != nil {
|
|
logger.Error("executing block", "err", err)
|
|
return nil, err
|
|
}
|
|
logger.Info("executed block", "height", block.Height)
|
|
|
|
// the BlockExecutor condition is using for the final block replay process.
|
|
if be != nil {
|
|
err = validateValidatorUpdates(finalizeBlockResponse.ValidatorUpdates, s.ConsensusParams.Validator)
|
|
if err != nil {
|
|
logger.Error("validating validator updates", "err", err)
|
|
return nil, err
|
|
}
|
|
validatorUpdates, err := types.PB2TM.ValidatorUpdates(finalizeBlockResponse.ValidatorUpdates)
|
|
if err != nil {
|
|
logger.Error("converting validator updates to native types", "err", err)
|
|
return nil, err
|
|
}
|
|
|
|
bps, err := block.MakePartSet(types.BlockPartSizeBytes)
|
|
if err != nil {
|
|
return nil, err
|
|
}
|
|
|
|
blockID := types.BlockID{Hash: block.Hash(), PartSetHeader: bps.Header()}
|
|
fireEvents(ctx, be.logger, be.eventBus, block, blockID, finalizeBlockResponse, validatorUpdates)
|
|
}
|
|
|
|
// Commit block, get hash back
|
|
res, err := appConnConsensus.Commit(ctx)
|
|
if err != nil {
|
|
logger.Error("client error during proxyAppConn.Commit", "err", res)
|
|
return nil, err
|
|
}
|
|
|
|
// ResponseCommit has no error or log, just data
|
|
return res.Data, nil
|
|
}
|
|
|
|
func (blockExec *BlockExecutor) pruneBlocks(retainHeight int64) (uint64, error) {
|
|
base := blockExec.blockStore.Base()
|
|
if retainHeight <= base {
|
|
return 0, nil
|
|
}
|
|
pruned, err := blockExec.blockStore.PruneBlocks(retainHeight)
|
|
if err != nil {
|
|
return 0, fmt.Errorf("failed to prune block store: %w", err)
|
|
}
|
|
|
|
err = blockExec.Store().PruneStates(retainHeight)
|
|
if err != nil {
|
|
return 0, fmt.Errorf("failed to prune state store: %w", err)
|
|
}
|
|
return pruned, nil
|
|
}
|