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297 lines
9.1 KiB
297 lines
9.1 KiB
package state
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import (
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"errors"
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"fmt"
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fail "github.com/ebuchman/fail-test"
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abci "github.com/tendermint/abci/types"
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crypto "github.com/tendermint/go-crypto"
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"github.com/tendermint/tendermint/proxy"
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"github.com/tendermint/tendermint/types"
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cmn "github.com/tendermint/tmlibs/common"
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"github.com/tendermint/tmlibs/log"
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)
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//--------------------------------------------------
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// Execute the block
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// ValExecBlock executes the block, but does NOT mutate State.
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// + validates the block
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// + executes block.Txs on the proxyAppConn
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func (s *State) ValExecBlock(txEventPublisher types.TxEventPublisher, proxyAppConn proxy.AppConnConsensus, block *types.Block) (*ABCIResponses, error) {
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// Validate the block.
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if err := s.validateBlock(block); err != nil {
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return nil, ErrInvalidBlock(err)
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}
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// Execute the block txs
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abciResponses, err := execBlockOnProxyApp(txEventPublisher, proxyAppConn, block, s.logger)
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if err != nil {
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// There was some error in proxyApp
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// TODO Report error and wait for proxyApp to be available.
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return nil, ErrProxyAppConn(err)
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}
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return abciResponses, nil
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}
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// Executes block's transactions on proxyAppConn.
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// Returns a list of transaction results and updates to the validator set
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// TODO: Generate a bitmap or otherwise store tx validity in state.
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func execBlockOnProxyApp(txEventPublisher types.TxEventPublisher, proxyAppConn proxy.AppConnConsensus, block *types.Block, logger log.Logger) (*ABCIResponses, error) {
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var validTxs, invalidTxs = 0, 0
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txIndex := 0
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abciResponses := NewABCIResponses(block)
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// Execute transactions and get hash
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proxyCb := func(req *abci.Request, res *abci.Response) {
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switch r := res.Value.(type) {
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case *abci.Response_DeliverTx:
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// TODO: make use of res.Log
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// TODO: make use of this info
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// Blocks may include invalid txs.
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// reqDeliverTx := req.(abci.RequestDeliverTx)
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txResult := r.DeliverTx
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if txResult.Code == abci.CodeTypeOK {
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validTxs++
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} else {
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logger.Debug("Invalid tx", "code", txResult.Code, "log", txResult.Log)
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invalidTxs++
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}
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// NOTE: if we count we can access the tx from the block instead of
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// pulling it from the req
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txEventPublisher.PublishEventTx(types.EventDataTx{types.TxResult{
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Height: block.Height,
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Index: uint32(txIndex),
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Tx: types.Tx(req.GetDeliverTx().Tx),
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Result: *txResult,
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}})
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abciResponses.DeliverTx[txIndex] = txResult
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txIndex++
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}
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}
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proxyAppConn.SetResponseCallback(proxyCb)
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// Begin block
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_, err := proxyAppConn.BeginBlockSync(abci.RequestBeginBlock{
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block.Hash(),
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types.TM2PB.Header(block.Header),
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nil,
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nil,
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})
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if err != nil {
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logger.Error("Error in proxyAppConn.BeginBlock", "err", err)
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return nil, err
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}
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// Run txs of block
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for _, tx := range block.Txs {
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proxyAppConn.DeliverTxAsync(tx)
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if err := proxyAppConn.Error(); err != nil {
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return nil, err
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}
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}
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// End block
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abciResponses.EndBlock, err = proxyAppConn.EndBlockSync(abci.RequestEndBlock{block.Height})
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if err != nil {
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logger.Error("Error in proxyAppConn.EndBlock", "err", err)
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return nil, err
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}
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valDiff := abciResponses.EndBlock.Diffs
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logger.Info("Executed block", "height", block.Height, "validTxs", validTxs, "invalidTxs", invalidTxs)
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if len(valDiff) > 0 {
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logger.Info("Update to validator set", "updates", abci.ValidatorsString(valDiff))
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}
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return abciResponses, nil
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}
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func updateValidators(validators *types.ValidatorSet, changedValidators []*abci.Validator) error {
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// TODO: prevent change of 1/3+ at once
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for _, v := range changedValidators {
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pubkey, err := crypto.PubKeyFromBytes(v.PubKey) // NOTE: expects go-wire encoded pubkey
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if err != nil {
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return err
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}
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address := pubkey.Address()
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power := int64(v.Power)
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// mind the overflow from int64
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if power < 0 {
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return errors.New(cmn.Fmt("Power (%d) overflows int64", v.Power))
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}
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_, val := validators.GetByAddress(address)
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if val == nil {
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// add val
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added := validators.Add(types.NewValidator(pubkey, power))
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if !added {
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return errors.New(cmn.Fmt("Failed to add new validator %X with voting power %d", address, power))
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}
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} else if v.Power == 0 {
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// remove val
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_, removed := validators.Remove(address)
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if !removed {
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return errors.New(cmn.Fmt("Failed to remove validator %X)"))
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}
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} else {
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// update val
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val.VotingPower = power
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updated := validators.Update(val)
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if !updated {
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return errors.New(cmn.Fmt("Failed to update validator %X with voting power %d", address, power))
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}
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}
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}
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return nil
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}
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// return a bit array of validators that signed the last commit
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// NOTE: assumes commits have already been authenticated
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/* function is currently unused
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func commitBitArrayFromBlock(block *types.Block) *cmn.BitArray {
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signed := cmn.NewBitArray(len(block.LastCommit.Precommits))
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for i, precommit := range block.LastCommit.Precommits {
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if precommit != nil {
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signed.SetIndex(i, true) // val_.LastCommitHeight = block.Height - 1
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}
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}
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return signed
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}
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*/
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//-----------------------------------------------------
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// Validate block
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// ValidateBlock validates the block against the state.
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func (s *State) ValidateBlock(block *types.Block) error {
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return s.validateBlock(block)
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}
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func (s *State) validateBlock(block *types.Block) error {
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// Basic block validation.
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err := block.ValidateBasic(s.ChainID, s.LastBlockHeight, s.LastBlockID, s.LastBlockTime, s.AppHash)
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if err != nil {
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return err
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}
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// Validate block LastCommit.
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if block.Height == 1 {
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if len(block.LastCommit.Precommits) != 0 {
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return errors.New("Block at height 1 (first block) should have no LastCommit precommits")
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}
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} else {
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if len(block.LastCommit.Precommits) != s.LastValidators.Size() {
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return errors.New(cmn.Fmt("Invalid block commit size. Expected %v, got %v",
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s.LastValidators.Size(), len(block.LastCommit.Precommits)))
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}
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err := s.LastValidators.VerifyCommit(
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s.ChainID, s.LastBlockID, block.Height-1, block.LastCommit)
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if err != nil {
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return err
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}
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}
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return nil
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}
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//-----------------------------------------------------------------------------
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// ApplyBlock 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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// ApplyBlock validates the block against the state, executes it against the app,
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// commits it, and saves the block and state. 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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func (s *State) ApplyBlock(txEventPublisher types.TxEventPublisher, proxyAppConn proxy.AppConnConsensus,
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block *types.Block, partsHeader types.PartSetHeader, mempool types.Mempool) error {
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abciResponses, err := s.ValExecBlock(txEventPublisher, proxyAppConn, block)
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if err != nil {
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return fmt.Errorf("Exec failed for application: %v", err)
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}
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fail.Fail() // XXX
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// save the results before we commit
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s.SaveABCIResponses(abciResponses)
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fail.Fail() // XXX
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// now update the block and validators
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s.SetBlockAndValidators(block.Header, partsHeader, abciResponses)
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// lock mempool, commit state, update mempoool
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err = s.CommitStateUpdateMempool(proxyAppConn, block, mempool)
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if err != nil {
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return fmt.Errorf("Commit failed for application: %v", err)
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}
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fail.Fail() // XXX
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// save the state and the validators
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s.Save()
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return nil
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}
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// CommitStateUpdateMempool locks the mempool, runs the ABCI Commit message, and updates the mempool.
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// The Mempool must be locked during commit and update because state is typically reset on Commit and old txs must be replayed
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// against committed state before new txs are run in the mempool, lest they be invalid.
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func (s *State) CommitStateUpdateMempool(proxyAppConn proxy.AppConnConsensus, block *types.Block, mempool types.Mempool) error {
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mempool.Lock()
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defer mempool.Unlock()
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// Commit block, get hash back
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res, err := proxyAppConn.CommitSync()
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if err != nil {
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s.logger.Error("Client error during proxyAppConn.CommitSync", "err", err)
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return err
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}
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if res.IsErr() {
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s.logger.Error("Error in proxyAppConn.CommitSync", "err", res)
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return res
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}
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if res.Log != "" {
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s.logger.Debug("Commit.Log: " + res.Log)
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}
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s.logger.Info("Committed state", "height", block.Height, "txs", block.NumTxs, "hash", res.Data)
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// Set the state's new AppHash
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s.AppHash = res.Data
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// Update mempool.
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return mempool.Update(block.Height, block.Txs)
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}
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// ExecCommitBlock executes and commits a block on the proxyApp without validating or mutating the state.
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// It returns the application root hash (result of abci.Commit).
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func ExecCommitBlock(appConnConsensus proxy.AppConnConsensus, block *types.Block, logger log.Logger) ([]byte, error) {
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_, err := execBlockOnProxyApp(types.NopEventBus{}, appConnConsensus, block, logger)
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if err != nil {
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logger.Error("Error executing block on proxy app", "height", block.Height, "err", err)
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return nil, err
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}
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// Commit block, get hash back
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res, err := appConnConsensus.CommitSync()
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if err != nil {
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logger.Error("Client error during proxyAppConn.CommitSync", "err", res)
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return nil, err
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}
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if res.IsErr() {
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logger.Error("Error in proxyAppConn.CommitSync", "err", res)
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return nil, res
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}
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if res.Log != "" {
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logger.Info("Commit.Log: " + res.Log)
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}
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return res.Data, nil
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}
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