2015-03-28 23:44:07 -07:00
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package state
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import (
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2016-09-11 12:32:33 -07:00
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"bytes"
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2015-03-28 23:44:07 -07:00
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"errors"
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2016-09-11 12:32:33 -07:00
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"github.com/ebuchman/fail-test"
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2015-10-22 17:39:06 -07:00
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. "github.com/tendermint/go-common"
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2016-11-16 13:13:17 -08:00
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cfg "github.com/tendermint/go-config"
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2016-11-19 16:32:35 -08:00
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"github.com/tendermint/go-crypto"
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2015-12-01 20:12:01 -08:00
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"github.com/tendermint/tendermint/proxy"
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2015-04-01 17:30:16 -07:00
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"github.com/tendermint/tendermint/types"
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2015-12-01 20:12:01 -08:00
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tmsp "github.com/tendermint/tmsp/types"
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2015-03-28 23:44:07 -07:00
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)
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2016-09-11 10:16:23 -07:00
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//--------------------------------------------------
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// Execute the block
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2015-12-01 20:12:01 -08:00
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// Execute the block to mutate State.
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2016-01-06 17:14:20 -08:00
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// Validates block and then executes Data.Txs in the block.
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2016-10-09 23:58:13 -07:00
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func (s *State) ExecBlock(eventCache types.Fireable, proxyAppConn proxy.AppConnConsensus, block *types.Block, blockPartsHeader types.PartSetHeader) error {
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2015-12-01 20:12:01 -08:00
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// Validate the block.
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2016-11-19 16:32:35 -08:00
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if err := s.validateBlock(block); err != nil {
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return ErrInvalidBlock(err)
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2015-03-28 23:44:07 -07:00
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}
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2015-12-01 20:12:01 -08:00
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2016-11-19 16:32:35 -08:00
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// compute bitarray of validators that signed
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2016-11-16 17:58:53 -08:00
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signed := commitBitArrayFromBlock(block)
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_ = signed // TODO send on begin block
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2016-11-19 16:32:35 -08:00
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// copy the valset
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valSet := s.Validators.Copy()
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2015-12-01 20:12:01 -08:00
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nextValSet := valSet.Copy()
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2016-01-06 17:14:20 -08:00
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// Execute the block txs
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changedValidators, err := execBlockOnProxyApp(eventCache, proxyAppConn, block)
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2015-12-01 20:12:01 -08:00
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if err != nil {
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2016-01-06 17:14:20 -08:00
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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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2016-09-11 10:16:23 -07:00
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return ErrProxyAppConn(err)
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2015-12-01 20:12:01 -08:00
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}
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2016-11-19 16:32:35 -08:00
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// update the validator set
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err = updateValidators(nextValSet, changedValidators)
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2016-11-19 17:29:07 -08:00
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if err != nil {
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2016-11-19 16:32:35 -08:00
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log.Warn("Error changing validator set", "error", err)
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// TODO: err or carry on?
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}
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2015-12-01 20:12:01 -08:00
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// All good!
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2016-08-23 18:44:07 -07:00
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// Update validator accums and set state variables
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2015-12-01 20:12:01 -08:00
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nextValSet.IncrementAccum(1)
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s.SetBlockAndValidators(block.Header, blockPartsHeader, valSet, nextValSet)
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2015-12-01 20:12:01 -08:00
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2016-09-11 10:16:23 -07:00
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// save state with updated height/blockhash/validators
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// but stale apphash, in case we fail between Commit and Save
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s.Save()
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2015-03-28 23:44:07 -07:00
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return nil
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}
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2016-01-06 17:14:20 -08:00
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// Executes block's transactions on proxyAppConn.
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// Returns a list of 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(eventCache types.Fireable, proxyAppConn proxy.AppConnConsensus, block *types.Block) ([]*tmsp.Validator, error) {
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2016-06-27 17:43:09 -07:00
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2016-01-06 17:14:20 -08:00
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var validTxs, invalidTxs = 0, 0
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2015-12-01 20:12:01 -08:00
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// Execute transactions and get hash
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2016-01-31 08:11:50 -08:00
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proxyCb := func(req *tmsp.Request, res *tmsp.Response) {
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2016-05-14 09:33:27 -07:00
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switch r := res.Value.(type) {
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case *tmsp.Response_AppendTx:
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2016-01-25 14:34:08 -08:00
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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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// reqAppendTx := req.(tmsp.RequestAppendTx)
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txError := ""
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apTx := r.AppendTx
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if apTx.Code == tmsp.CodeType_OK {
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validTxs += 1
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} else {
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log.Debug("Invalid tx", "code", r.AppendTx.Code, "log", r.AppendTx.Log)
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2016-01-06 17:14:20 -08:00
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invalidTxs += 1
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txError = apTx.Code.String()
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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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event := types.EventDataTx{
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Tx: req.GetAppendTx().Tx,
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Data: apTx.Data,
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Code: apTx.Code,
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Log: apTx.Log,
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Error: txError,
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}
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types.FireEventTx(eventCache, event)
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2015-12-01 20:12:01 -08:00
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}
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}
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2016-01-06 17:14:20 -08:00
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proxyAppConn.SetResponseCallback(proxyCb)
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2016-11-03 16:51:22 -07:00
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// Begin block
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2016-09-10 20:35:18 -07:00
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err := proxyAppConn.BeginBlockSync(block.Hash(), types.TM2PB.Header(block.Header))
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2016-11-03 16:51:22 -07:00
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if err != nil {
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log.Warn("Error in proxyAppConn.BeginBlock", "error", err)
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2016-11-19 16:32:35 -08:00
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return nil, err
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2016-11-03 16:51:22 -07:00
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}
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2016-08-06 20:30:46 -07:00
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2016-09-11 12:32:33 -07:00
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fail.Fail() // XXX
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2016-03-05 20:57:36 -08:00
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// Run txs of block
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for _, tx := range block.Txs {
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2016-09-11 12:32:33 -07:00
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fail.FailRand(len(block.Txs)) // XXX
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2016-01-06 17:14:20 -08:00
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proxyAppConn.AppendTxAsync(tx)
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if err := proxyAppConn.Error(); err != nil {
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2016-11-19 16:32:35 -08:00
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return nil, err
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2015-12-01 20:12:01 -08:00
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}
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}
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2016-03-05 20:57:36 -08:00
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2016-09-11 12:32:33 -07:00
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fail.Fail() // XXX
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2016-03-05 20:57:36 -08:00
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// End block
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changedValidators, err := proxyAppConn.EndBlockSync(uint64(block.Height))
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2016-03-05 20:57:36 -08:00
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if err != nil {
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log.Warn("Error in proxyAppConn.EndBlock", "error", err)
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2016-11-19 16:32:35 -08:00
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return nil, err
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2016-03-05 20:57:36 -08:00
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}
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2016-09-11 12:32:33 -07:00
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fail.Fail() // XXX
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2016-11-22 15:55:42 -08:00
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log.Info("Executed block", "height", block.Height, "valid txs", validTxs, "invalid txs", invalidTxs)
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if len(changedValidators) > 0 {
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2016-11-23 15:20:46 -08:00
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log.Info("Update to validator set", "updates", tmsp.ValidatorsString(changedValidators))
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2016-11-22 15:55:42 -08:00
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}
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2016-11-19 16:32:35 -08:00
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return changedValidators, nil
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}
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2016-12-01 21:12:06 -08:00
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func updateValidators(validators *types.ValidatorSet, changedValidators []*tmsp.Validator) error {
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2016-11-19 16:32:35 -08:00
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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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2016-12-01 21:12:06 -08:00
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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 uint64
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if power < 0 {
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return errors.New(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(Fmt("Failed to add new validator %X with voting power %d", address, power))
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2016-11-19 16:32:35 -08:00
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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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2016-12-01 21:12:06 -08:00
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return errors.New(Fmt("Failed to remove validator %X)"))
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2016-11-19 16:32:35 -08:00
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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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2016-12-01 21:12:06 -08:00
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return errors.New(Fmt("Failed to update validator %X with voting power %d", address, power))
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2016-11-19 16:32:35 -08:00
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}
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}
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}
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2016-12-01 21:12:06 -08:00
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return nil
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2015-12-01 20:12:01 -08:00
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}
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2016-11-16 17:58:53 -08:00
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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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func commitBitArrayFromBlock(block *types.Block) *BitArray {
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signed := NewBitArray(len(block.LastCommit.Precommits))
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2016-04-02 09:10:16 -07:00
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for i, precommit := range block.LastCommit.Precommits {
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2016-11-22 15:55:42 -08:00
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if precommit != nil {
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signed.SetIndex(i, true) // val_.LastCommitHeight = block.Height - 1
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2015-03-28 23:44:07 -07:00
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}
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}
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2016-11-16 17:58:53 -08:00
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return signed
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2015-05-12 17:40:19 -07:00
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}
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2015-08-10 20:38:45 -07:00
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2016-09-11 10:16:23 -07:00
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//-----------------------------------------------------
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// Validate block
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2015-08-10 20:38:45 -07:00
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2016-09-11 10:16:23 -07:00
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func (s *State) ValidateBlock(block *types.Block) error {
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return s.validateBlock(block)
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2015-08-10 20:38:45 -07:00
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}
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2016-09-11 10:16:23 -07:00
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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(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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2015-12-01 20:12:01 -08:00
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}
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2016-08-23 18:44:07 -07:00
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//-----------------------------------------------------------------------------
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2016-09-11 10:16:23 -07:00
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// ApplyBlock executes the block, then commits and updates the mempool atomically
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// Execute and commit block against app, save block and state
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2016-11-03 17:38:09 -07:00
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func (s *State) ApplyBlock(eventCache types.Fireable, proxyAppConn proxy.AppConnConsensus,
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2016-09-11 10:16:23 -07:00
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block *types.Block, partsHeader types.PartSetHeader, mempool Mempool) error {
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// Run the block on the State:
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// + update validator sets
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// + run txs on the proxyAppConn
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err := s.ExecBlock(eventCache, proxyAppConn, block, partsHeader)
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if err != nil {
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return errors.New(Fmt("Exec failed for application: %v", err))
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}
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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 errors.New(Fmt("Commit failed for application: %v", err))
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}
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return nil
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}
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2016-08-23 18:44:07 -07:00
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2016-08-24 21:18:03 -07:00
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// mempool must be locked during commit and update
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// 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 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 := proxyAppConn.CommitSync()
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if res.IsErr() {
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log.Warn("Error in proxyAppConn.CommitSync", "error", res)
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return res
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}
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if res.Log != "" {
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log.Debug("Commit.Log: " + res.Log)
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}
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// Set the state's new AppHash
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s.AppHash = res.Data
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2016-12-06 01:16:13 -08:00
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s.AppHashIsStale = false
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2016-08-24 21:18:03 -07:00
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// Update mempool.
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mempool.Update(block.Height, block.Txs)
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return nil
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}
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2016-09-11 10:16:23 -07:00
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// Updates to the mempool need to be synchronized with committing a block
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// so apps can reset their transient state on Commit
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type Mempool interface {
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Lock()
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Unlock()
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Update(height int, txs []types.Tx)
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}
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2016-08-24 21:18:03 -07:00
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2016-09-11 10:16:23 -07:00
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type mockMempool struct {
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|
|
}
|
2016-08-24 21:18:03 -07:00
|
|
|
|
2016-09-11 10:16:23 -07:00
|
|
|
func (m mockMempool) Lock() {}
|
|
|
|
func (m mockMempool) Unlock() {}
|
|
|
|
func (m mockMempool) Update(height int, txs []types.Tx) {}
|
|
|
|
|
|
|
|
//----------------------------------------------------------------
|
2016-11-05 18:48:39 -07:00
|
|
|
// Handshake with app to sync to latest state of core by replaying blocks
|
2016-09-11 10:16:23 -07:00
|
|
|
|
2016-11-05 18:48:39 -07:00
|
|
|
// TODO: Should we move blockchain/store.go to its own package?
|
|
|
|
type BlockStore interface {
|
|
|
|
Height() int
|
|
|
|
LoadBlock(height int) *types.Block
|
2016-11-22 15:55:42 -08:00
|
|
|
LoadBlockMeta(height int) *types.BlockMeta
|
2016-09-11 10:16:23 -07:00
|
|
|
}
|
|
|
|
|
2016-11-05 18:48:39 -07:00
|
|
|
type Handshaker struct {
|
2016-11-16 13:13:17 -08:00
|
|
|
config cfg.Config
|
|
|
|
state *State
|
|
|
|
store BlockStore
|
2016-09-11 10:16:23 -07:00
|
|
|
|
2016-11-05 18:48:39 -07:00
|
|
|
nBlocks int // number of blocks applied to the state
|
2016-09-11 12:32:33 -07:00
|
|
|
}
|
|
|
|
|
2016-11-16 13:13:17 -08:00
|
|
|
func NewHandshaker(config cfg.Config, state *State, store BlockStore) *Handshaker {
|
|
|
|
return &Handshaker{config, state, store, 0}
|
2016-09-11 12:32:33 -07:00
|
|
|
}
|
|
|
|
|
2016-11-22 15:55:42 -08:00
|
|
|
// TODO: retry the handshake/replay if it fails ?
|
2016-11-05 18:48:39 -07:00
|
|
|
func (h *Handshaker) Handshake(proxyApp proxy.AppConns) error {
|
|
|
|
// handshake is done via info request on the query conn
|
|
|
|
res, tmspInfo, blockInfo, configInfo := proxyApp.Query().InfoSync()
|
|
|
|
if res.IsErr() {
|
|
|
|
return errors.New(Fmt("Error calling Info. Code: %v; Data: %X; Log: %s", res.Code, res.Data, res.Log))
|
|
|
|
}
|
|
|
|
|
|
|
|
if blockInfo == nil {
|
|
|
|
log.Warn("blockInfo is nil, aborting handshake")
|
|
|
|
return nil
|
|
|
|
}
|
|
|
|
|
2016-11-23 15:20:46 -08:00
|
|
|
log.Notice("TMSP Handshake", "height", blockInfo.BlockHeight, "app_hash", blockInfo.AppHash)
|
2016-11-05 18:48:39 -07:00
|
|
|
|
2016-11-22 15:55:42 -08:00
|
|
|
blockHeight := int(blockInfo.BlockHeight) // XXX: beware overflow
|
2016-11-05 18:48:39 -07:00
|
|
|
appHash := blockInfo.AppHash
|
|
|
|
|
|
|
|
if tmspInfo != nil {
|
|
|
|
// TODO: check tmsp version (or do this in the tmspcli?)
|
|
|
|
_ = tmspInfo
|
|
|
|
}
|
|
|
|
|
|
|
|
if configInfo != nil {
|
|
|
|
// TODO: set config info
|
|
|
|
_ = configInfo
|
|
|
|
}
|
2016-09-11 10:16:23 -07:00
|
|
|
|
2016-11-05 18:48:39 -07:00
|
|
|
// replay blocks up to the latest in the blockstore
|
2016-11-22 15:55:42 -08:00
|
|
|
err := h.ReplayBlocks(appHash, blockHeight, proxyApp.Consensus())
|
2016-11-05 18:48:39 -07:00
|
|
|
if err != nil {
|
|
|
|
return errors.New(Fmt("Error on replay: %v", err))
|
|
|
|
}
|
|
|
|
|
|
|
|
// TODO: (on restart) replay mempool
|
|
|
|
|
|
|
|
return nil
|
2016-08-24 21:18:03 -07:00
|
|
|
}
|
|
|
|
|
|
|
|
// Replay all blocks after blockHeight and ensure the result matches the current state.
|
2016-11-22 15:55:42 -08:00
|
|
|
func (h *Handshaker) ReplayBlocks(appHash []byte, appBlockHeight int, appConnConsensus proxy.AppConnConsensus) error {
|
2016-08-23 18:44:07 -07:00
|
|
|
|
2016-11-22 15:55:42 -08:00
|
|
|
storeBlockHeight := h.store.Height()
|
|
|
|
if storeBlockHeight < appBlockHeight {
|
2016-09-11 12:32:33 -07:00
|
|
|
// if the app is ahead, there's nothing we can do
|
2016-11-22 15:55:42 -08:00
|
|
|
return ErrAppBlockHeightTooHigh{storeBlockHeight, appBlockHeight}
|
2016-09-11 10:16:23 -07:00
|
|
|
|
2016-11-22 15:55:42 -08:00
|
|
|
} else if storeBlockHeight == appBlockHeight {
|
2016-09-11 10:16:23 -07:00
|
|
|
// if we crashed between Commit and SaveState,
|
2016-11-22 15:55:42 -08:00
|
|
|
// the state's app hash is stale
|
2016-09-11 12:32:33 -07:00
|
|
|
// otherwise we're synced
|
2016-12-01 21:12:06 -08:00
|
|
|
if h.state.AppHashIsStale {
|
|
|
|
h.state.AppHashIsStale = false
|
2016-11-05 18:48:39 -07:00
|
|
|
h.state.AppHash = appHash
|
2016-09-11 10:16:23 -07:00
|
|
|
}
|
2016-11-19 16:59:56 -08:00
|
|
|
return nil
|
2016-09-11 12:32:33 -07:00
|
|
|
|
2016-11-05 18:48:39 -07:00
|
|
|
} else if h.state.LastBlockHeight == appBlockHeight {
|
2016-11-22 15:55:42 -08:00
|
|
|
// store is ahead of app but core's state height is at apps height
|
2016-09-11 12:32:33 -07:00
|
|
|
// this happens if we crashed after saving the block,
|
|
|
|
// but before committing it. We should be 1 ahead
|
2016-11-22 15:55:42 -08:00
|
|
|
if storeBlockHeight != appBlockHeight+1 {
|
|
|
|
PanicSanity(Fmt("core.state.height == app.height but store.height (%d) > app.height+1 (%d)", storeBlockHeight, appBlockHeight+1))
|
2016-09-11 12:32:33 -07:00
|
|
|
}
|
|
|
|
|
|
|
|
// check that the blocks last apphash is the states apphash
|
2016-11-22 15:55:42 -08:00
|
|
|
block := h.store.LoadBlock(storeBlockHeight)
|
2016-11-05 18:48:39 -07:00
|
|
|
if !bytes.Equal(block.Header.AppHash, appHash) {
|
2016-11-22 15:55:42 -08:00
|
|
|
return ErrLastStateMismatch{storeBlockHeight, block.Header.AppHash, appHash}
|
2016-09-11 12:32:33 -07:00
|
|
|
}
|
|
|
|
|
2016-11-22 15:55:42 -08:00
|
|
|
blockMeta := h.store.LoadBlockMeta(storeBlockHeight)
|
|
|
|
|
2016-11-19 16:59:56 -08:00
|
|
|
h.nBlocks += 1
|
|
|
|
var eventCache types.Fireable // nil
|
|
|
|
|
|
|
|
// replay the block against the actual tendermint state
|
2016-11-22 15:55:42 -08:00
|
|
|
return h.state.ApplyBlock(eventCache, appConnConsensus, block, blockMeta.PartsHeader, mockMempool{})
|
2016-08-23 18:44:07 -07:00
|
|
|
|
2016-09-11 10:16:23 -07:00
|
|
|
} else {
|
2016-09-11 12:32:33 -07:00
|
|
|
// either we're caught up or there's blocks to replay
|
2016-09-11 10:16:23 -07:00
|
|
|
// replay all blocks starting with appBlockHeight+1
|
2016-11-19 16:59:56 -08:00
|
|
|
var eventCache types.Fireable // nil
|
|
|
|
var appHash []byte
|
2016-11-22 15:55:42 -08:00
|
|
|
for i := appBlockHeight + 1; i <= storeBlockHeight; i++ {
|
2016-11-19 16:59:56 -08:00
|
|
|
h.nBlocks += 1
|
|
|
|
block := h.store.LoadBlock(i)
|
|
|
|
_, err := execBlockOnProxyApp(eventCache, appConnConsensus, block)
|
|
|
|
if err != nil {
|
2016-11-22 15:55:42 -08:00
|
|
|
log.Warn("Error executing block on proxy app", "height", i, "err", err)
|
|
|
|
return err
|
2016-11-19 16:59:56 -08:00
|
|
|
}
|
|
|
|
// Commit block, get hash back
|
|
|
|
res := appConnConsensus.CommitSync()
|
|
|
|
if res.IsErr() {
|
|
|
|
log.Warn("Error in proxyAppConn.CommitSync", "error", res)
|
|
|
|
return res
|
|
|
|
}
|
|
|
|
if res.Log != "" {
|
|
|
|
log.Info("Commit.Log: " + res.Log)
|
|
|
|
}
|
|
|
|
appHash = res.Data
|
|
|
|
}
|
|
|
|
if !bytes.Equal(h.state.AppHash, appHash) {
|
|
|
|
return errors.New(Fmt("Tendermint state.AppHash does not match AppHash after replay", "expected", h.state.AppHash, "got", appHash))
|
2016-09-11 10:16:23 -07:00
|
|
|
}
|
2016-11-22 15:55:42 -08:00
|
|
|
return nil
|
2016-08-24 21:18:03 -07:00
|
|
|
}
|
|
|
|
}
|