forked from cometbft/cometbft
/
store.go
708 lines (605 loc) · 21.2 KB
/
store.go
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package state
import (
"errors"
"fmt"
"github.com/cosmos/gogoproto/proto"
dbm "github.com/cometbft/cometbft-db"
abci "github.com/ben2077/cometbft/abci/types"
cmtmath "github.com/ben2077/cometbft/libs/math"
cmtos "github.com/ben2077/cometbft/libs/os"
cmtstate "github.com/ben2077/cometbft/proto/tendermint/state"
cmtproto "github.com/ben2077/cometbft/proto/tendermint/types"
"github.com/ben2077/cometbft/types"
)
const (
// persist validators every valSetCheckpointInterval blocks to avoid
// LoadValidators taking too much time.
// https://github.com/tendermint/tendermint/pull/3438
// 100000 results in ~ 100ms to get 100 validators (see BenchmarkLoadValidators)
valSetCheckpointInterval = 100000
)
//------------------------------------------------------------------------
func calcValidatorsKey(height int64) []byte {
return []byte(fmt.Sprintf("validatorsKey:%v", height))
}
func calcConsensusParamsKey(height int64) []byte {
return []byte(fmt.Sprintf("consensusParamsKey:%v", height))
}
func calcABCIResponsesKey(height int64) []byte {
return []byte(fmt.Sprintf("abciResponsesKey:%v", height))
}
//----------------------
var lastABCIResponseKey = []byte("lastABCIResponseKey")
//go:generate ../scripts/mockery_generate.sh Store
// Store defines the state store interface
//
// It is used to retrieve current state and save and load ABCI responses,
// validators and consensus parameters
type Store interface {
// LoadFromDBOrGenesisFile loads the most recent state.
// If the chain is new it will use the genesis file from the provided genesis file path as the current state.
LoadFromDBOrGenesisFile(string) (State, error)
// LoadFromDBOrGenesisDoc loads the most recent state.
// If the chain is new it will use the genesis doc as the current state.
LoadFromDBOrGenesisDoc(*types.GenesisDoc) (State, error)
// Load loads the current state of the blockchain
Load() (State, error)
// LoadValidators loads the validator set at a given height
LoadValidators(int64) (*types.ValidatorSet, error)
// LoadFinalizeBlockResponse loads the abciResponse for a given height
LoadFinalizeBlockResponse(int64) (*abci.ResponseFinalizeBlock, error)
// LoadLastABCIResponse loads the last abciResponse for a given height
LoadLastFinalizeBlockResponse(int64) (*abci.ResponseFinalizeBlock, error)
// LoadConsensusParams loads the consensus params for a given height
LoadConsensusParams(int64) (types.ConsensusParams, error)
// Save overwrites the previous state with the updated one
Save(State) error
// SaveFinalizeBlockResponse saves ABCIResponses for a given height
SaveFinalizeBlockResponse(int64, *abci.ResponseFinalizeBlock) error
// Bootstrap is used for bootstrapping state when not starting from a initial height.
Bootstrap(State) error
// PruneStates takes the height from which to start pruning and which height stop at
PruneStates(int64, int64, int64) error
// Close closes the connection with the database
Close() error
}
// dbStore wraps a db (github.com/cometbft/cometbft-db)
type dbStore struct {
db dbm.DB
StoreOptions
}
type StoreOptions struct {
// DiscardABCIResponses determines whether or not the store
// retains all ABCIResponses. If DiscardABCIResponses is enabled,
// the store will maintain only the response object from the latest
// height.
DiscardABCIResponses bool
}
var _ Store = (*dbStore)(nil)
// NewStore creates the dbStore of the state pkg.
func NewStore(db dbm.DB, options StoreOptions) Store {
return dbStore{db, options}
}
// LoadStateFromDBOrGenesisFile loads the most recent state from the database,
// or creates a new one from the given genesisFilePath.
func (store dbStore) LoadFromDBOrGenesisFile(genesisFilePath string) (State, error) {
state, err := store.Load()
if err != nil {
return State{}, err
}
if state.IsEmpty() {
var err error
state, err = MakeGenesisStateFromFile(genesisFilePath)
if err != nil {
return state, err
}
}
return state, nil
}
// LoadStateFromDBOrGenesisDoc loads the most recent state from the database,
// or creates a new one from the given genesisDoc.
func (store dbStore) LoadFromDBOrGenesisDoc(genesisDoc *types.GenesisDoc) (State, error) {
state, err := store.Load()
if err != nil {
return State{}, err
}
if state.IsEmpty() {
var err error
state, err = MakeGenesisState(genesisDoc)
if err != nil {
return state, err
}
}
return state, nil
}
// LoadState loads the State from the database.
func (store dbStore) Load() (State, error) {
return store.loadState(stateKey)
}
func (store dbStore) loadState(key []byte) (state State, err error) {
buf, err := store.db.Get(key)
if err != nil {
return state, err
}
if len(buf) == 0 {
return state, nil
}
sp := new(cmtstate.State)
err = proto.Unmarshal(buf, sp)
if err != nil {
// DATA HAS BEEN CORRUPTED OR THE SPEC HAS CHANGED
cmtos.Exit(fmt.Sprintf(`LoadState: Data has been corrupted or its spec has changed:
%v\n`, err))
}
sm, err := FromProto(sp)
if err != nil {
return state, err
}
return *sm, nil
}
// Save persists the State, the ValidatorsInfo, and the ConsensusParamsInfo to the database.
// This flushes the writes (e.g. calls SetSync).
func (store dbStore) Save(state State) error {
return store.save(state, stateKey)
}
func (store dbStore) save(state State, key []byte) error {
nextHeight := state.LastBlockHeight + 1
// If first block, save validators for the block.
if nextHeight == 1 {
nextHeight = state.InitialHeight
// This extra logic due to validator set changes being delayed 1 block.
// It may get overwritten due to InitChain validator updates.
if err := store.saveValidatorsInfo(nextHeight, nextHeight, state.Validators); err != nil {
return err
}
}
// Save next validators.
if err := store.saveValidatorsInfo(nextHeight+1, state.LastHeightValidatorsChanged, state.NextValidators); err != nil {
return err
}
// Save next consensus params.
if err := store.saveConsensusParamsInfo(nextHeight,
state.LastHeightConsensusParamsChanged, state.ConsensusParams); err != nil {
return err
}
err := store.db.SetSync(key, state.Bytes())
if err != nil {
return err
}
return nil
}
// BootstrapState saves a new state, used e.g. by state sync when starting from non-zero height.
func (store dbStore) Bootstrap(state State) error {
height := state.LastBlockHeight + 1
if height == 1 {
height = state.InitialHeight
}
if height > 1 && !state.LastValidators.IsNilOrEmpty() {
if err := store.saveValidatorsInfo(height-1, height-1, state.LastValidators); err != nil {
return err
}
}
if err := store.saveValidatorsInfo(height, height, state.Validators); err != nil {
return err
}
if err := store.saveValidatorsInfo(height+1, height+1, state.NextValidators); err != nil {
return err
}
if err := store.saveConsensusParamsInfo(height,
state.LastHeightConsensusParamsChanged, state.ConsensusParams); err != nil {
return err
}
return store.db.SetSync(stateKey, state.Bytes())
}
// PruneStates deletes states between the given heights (including from, excluding to). It is not
// guaranteed to delete all states, since the last checkpointed state and states being pointed to by
// e.g. `LastHeightChanged` must remain. The state at to must also exist.
//
// The from parameter is necessary since we can't do a key scan in a performant way due to the key
// encoding not preserving ordering: https://github.com/tendermint/tendermint/issues/4567
// This will cause some old states to be left behind when doing incremental partial prunes,
// specifically older checkpoints and LastHeightChanged targets.
func (store dbStore) PruneStates(from int64, to int64, evidenceThresholdHeight int64) error {
if from <= 0 || to <= 0 {
return fmt.Errorf("from height %v and to height %v must be greater than 0", from, to)
}
if from >= to {
return fmt.Errorf("from height %v must be lower than to height %v", from, to)
}
valInfo, err := loadValidatorsInfo(store.db, min(to, evidenceThresholdHeight))
if err != nil {
return fmt.Errorf("validators at height %v not found: %w", to, err)
}
paramsInfo, err := store.loadConsensusParamsInfo(to)
if err != nil {
return fmt.Errorf("consensus params at height %v not found: %w", to, err)
}
keepVals := make(map[int64]bool)
if valInfo.ValidatorSet == nil {
keepVals[valInfo.LastHeightChanged] = true
keepVals[lastStoredHeightFor(to, valInfo.LastHeightChanged)] = true // keep last checkpoint too
}
keepParams := make(map[int64]bool)
if paramsInfo.ConsensusParams.Equal(&cmtproto.ConsensusParams{}) {
keepParams[paramsInfo.LastHeightChanged] = true
}
batch := store.db.NewBatch()
defer batch.Close()
pruned := uint64(0)
// We have to delete in reverse order, to avoid deleting previous heights that have validator
// sets and consensus params that we may need to retrieve.
for h := to - 1; h >= from; h-- {
// For heights we keep, we must make sure they have the full validator set or consensus
// params, otherwise they will panic if they're retrieved directly (instead of
// indirectly via a LastHeightChanged pointer).
if keepVals[h] {
v, err := loadValidatorsInfo(store.db, h)
if err != nil || v.ValidatorSet == nil {
vip, err := store.LoadValidators(h)
if err != nil {
return err
}
pvi, err := vip.ToProto()
if err != nil {
return err
}
v.ValidatorSet = pvi
v.LastHeightChanged = h
bz, err := v.Marshal()
if err != nil {
return err
}
err = batch.Set(calcValidatorsKey(h), bz)
if err != nil {
return err
}
}
} else if h < evidenceThresholdHeight {
err = batch.Delete(calcValidatorsKey(h))
if err != nil {
return err
}
}
// else we keep the validator set because we might need
// it later on for evidence verification
if keepParams[h] {
p, err := store.loadConsensusParamsInfo(h)
if err != nil {
return err
}
if p.ConsensusParams.Equal(&cmtproto.ConsensusParams{}) {
params, err := store.LoadConsensusParams(h)
if err != nil {
return err
}
p.ConsensusParams = params.ToProto()
p.LastHeightChanged = h
bz, err := p.Marshal()
if err != nil {
return err
}
err = batch.Set(calcConsensusParamsKey(h), bz)
if err != nil {
return err
}
}
} else {
err = batch.Delete(calcConsensusParamsKey(h))
if err != nil {
return err
}
}
err = batch.Delete(calcABCIResponsesKey(h))
if err != nil {
return err
}
pruned++
// avoid batches growing too large by flushing to database regularly
if pruned%1000 == 0 && pruned > 0 {
err := batch.Write()
if err != nil {
return err
}
batch.Close()
batch = store.db.NewBatch()
defer batch.Close()
}
}
err = batch.WriteSync()
if err != nil {
return err
}
return nil
}
//------------------------------------------------------------------------
// TxResultsHash returns the root hash of a Merkle tree of
// ExecTxResulst responses (see ABCIResults.Hash)
//
// See merkle.SimpleHashFromByteSlices
func TxResultsHash(txResults []*abci.ExecTxResult) []byte {
return types.NewResults(txResults).Hash()
}
// LoadFinalizeBlockResponse loads the DiscardABCIResponses for the given height from the
// database. If the node has D set to true, ErrABCIResponsesNotPersisted
// is persisted. If not found, ErrNoABCIResponsesForHeight is returned.
func (store dbStore) LoadFinalizeBlockResponse(height int64) (*abci.ResponseFinalizeBlock, error) {
if store.DiscardABCIResponses {
return nil, ErrFinalizeBlockResponsesNotPersisted
}
buf, err := store.db.Get(calcABCIResponsesKey(height))
if err != nil {
return nil, err
}
if len(buf) == 0 {
return nil, ErrNoABCIResponsesForHeight{height}
}
resp := new(abci.ResponseFinalizeBlock)
err = resp.Unmarshal(buf)
if err != nil {
// The data might be of the legacy ABCI response type, so
// we try to unmarshal that
legacyResp := new(cmtstate.LegacyABCIResponses)
rerr := legacyResp.Unmarshal(buf)
if rerr != nil {
// DATA HAS BEEN CORRUPTED OR THE SPEC HAS CHANGED
cmtos.Exit(fmt.Sprintf(`LoadFinalizeBlockResponse: Data has been corrupted or its spec has
changed: %v\n`, err))
}
// The state store contains the old format. Migrate to
// the new ResponseFinalizeBlock format. Note that the
// new struct expects the AppHash which we don't have.
return responseFinalizeBlockFromLegacy(legacyResp), nil
}
// TODO: ensure that buf is completely read.
return resp, nil
}
// LoadLastFinalizeBlockResponses loads the FinalizeBlockResponses from the most recent height.
// The height parameter is used to ensure that the response corresponds to the latest height.
// If not, an error is returned.
//
// This method is used for recovering in the case that we called the Commit ABCI
// method on the application but crashed before persisting the results.
func (store dbStore) LoadLastFinalizeBlockResponse(height int64) (*abci.ResponseFinalizeBlock, error) {
bz, err := store.db.Get(lastABCIResponseKey)
if err != nil {
return nil, err
}
if len(bz) == 0 {
return nil, errors.New("no last ABCI response has been persisted")
}
info := new(cmtstate.ABCIResponsesInfo)
err = info.Unmarshal(bz)
if err != nil {
cmtos.Exit(fmt.Sprintf(`LoadLastFinalizeBlockResponse: Data has been corrupted or its spec has
changed: %v\n`, err))
}
// Here we validate the result by comparing its height to the expected height.
if height != info.GetHeight() {
return nil, fmt.Errorf("expected height %d but last stored abci responses was at height %d", height, info.GetHeight())
}
// It is possible if this is called directly after an upgrade that
// ResponseFinalizeBlock is nil. In which case we use the legacy
// ABCI responses
if info.ResponseFinalizeBlock == nil {
// sanity check
if info.LegacyAbciResponses == nil {
panic("state store contains last abci response but it is empty")
}
return responseFinalizeBlockFromLegacy(info.LegacyAbciResponses), nil
}
return info.ResponseFinalizeBlock, nil
}
// SaveFinalizeBlockResponse persists the ResponseFinalizeBlock to the database.
// This is useful in case we crash after app.Commit and before s.Save().
// Responses are indexed by height so they can also be loaded later to produce
// Merkle proofs.
//
// CONTRACT: height must be monotonically increasing every time this is called.
func (store dbStore) SaveFinalizeBlockResponse(height int64, resp *abci.ResponseFinalizeBlock) error {
var dtxs []*abci.ExecTxResult
// strip nil values,
for _, tx := range resp.TxResults {
if tx != nil {
dtxs = append(dtxs, tx)
}
}
resp.TxResults = dtxs
// If the flag is false then we save the ABCIResponse. This can be used for the /BlockResults
// query or to reindex an event using the command line.
if !store.DiscardABCIResponses {
bz, err := resp.Marshal()
if err != nil {
return err
}
if err := store.db.Set(calcABCIResponsesKey(height), bz); err != nil {
return err
}
}
// We always save the last ABCI response for crash recovery.
// This overwrites the previous saved ABCI Response.
response := &cmtstate.ABCIResponsesInfo{
ResponseFinalizeBlock: resp,
Height: height,
}
bz, err := response.Marshal()
if err != nil {
return err
}
return store.db.SetSync(lastABCIResponseKey, bz)
}
//-----------------------------------------------------------------------------
// LoadValidators loads the ValidatorSet for a given height.
// Returns ErrNoValSetForHeight if the validator set can't be found for this height.
func (store dbStore) LoadValidators(height int64) (*types.ValidatorSet, error) {
valInfo, err := loadValidatorsInfo(store.db, height)
if err != nil {
return nil, ErrNoValSetForHeight{height}
}
if valInfo.ValidatorSet == nil {
lastStoredHeight := lastStoredHeightFor(height, valInfo.LastHeightChanged)
valInfo2, err := loadValidatorsInfo(store.db, lastStoredHeight)
if err != nil || valInfo2.ValidatorSet == nil {
return nil,
fmt.Errorf("couldn't find validators at height %d (height %d was originally requested): %w",
lastStoredHeight,
height,
err,
)
}
vs, err := types.ValidatorSetFromProto(valInfo2.ValidatorSet)
if err != nil {
return nil, err
}
vs.IncrementProposerPriority(cmtmath.SafeConvertInt32(height - lastStoredHeight)) // mutate
vi2, err := vs.ToProto()
if err != nil {
return nil, err
}
valInfo2.ValidatorSet = vi2
valInfo = valInfo2
}
vip, err := types.ValidatorSetFromProto(valInfo.ValidatorSet)
if err != nil {
return nil, err
}
return vip, nil
}
func lastStoredHeightFor(height, lastHeightChanged int64) int64 {
checkpointHeight := height - height%valSetCheckpointInterval
return cmtmath.MaxInt64(checkpointHeight, lastHeightChanged)
}
// CONTRACT: Returned ValidatorsInfo can be mutated.
func loadValidatorsInfo(db dbm.DB, height int64) (*cmtstate.ValidatorsInfo, error) {
buf, err := db.Get(calcValidatorsKey(height))
if err != nil {
return nil, err
}
if len(buf) == 0 {
return nil, errors.New("value retrieved from db is empty")
}
v := new(cmtstate.ValidatorsInfo)
err = v.Unmarshal(buf)
if err != nil {
// DATA HAS BEEN CORRUPTED OR THE SPEC HAS CHANGED
cmtos.Exit(fmt.Sprintf(`LoadValidators: Data has been corrupted or its spec has changed:
%v\n`, err))
}
// TODO: ensure that buf is completely read.
return v, nil
}
// saveValidatorsInfo persists the validator set.
//
// `height` is the effective height for which the validator is responsible for
// signing. It should be called from s.Save(), right before the state itself is
// persisted.
func (store dbStore) saveValidatorsInfo(height, lastHeightChanged int64, valSet *types.ValidatorSet) error {
if lastHeightChanged > height {
return errors.New("lastHeightChanged cannot be greater than ValidatorsInfo height")
}
valInfo := &cmtstate.ValidatorsInfo{
LastHeightChanged: lastHeightChanged,
}
// Only persist validator set if it was updated or checkpoint height (see
// valSetCheckpointInterval) is reached.
if height == lastHeightChanged || height%valSetCheckpointInterval == 0 {
pv, err := valSet.ToProto()
if err != nil {
return err
}
valInfo.ValidatorSet = pv
}
bz, err := valInfo.Marshal()
if err != nil {
return err
}
err = store.db.Set(calcValidatorsKey(height), bz)
if err != nil {
return err
}
return nil
}
//-----------------------------------------------------------------------------
// ConsensusParamsInfo represents the latest consensus params, or the last height it changed
// LoadConsensusParams loads the ConsensusParams for a given height.
func (store dbStore) LoadConsensusParams(height int64) (types.ConsensusParams, error) {
var (
empty = types.ConsensusParams{}
emptypb = cmtproto.ConsensusParams{}
)
paramsInfo, err := store.loadConsensusParamsInfo(height)
if err != nil {
return empty, fmt.Errorf("could not find consensus params for height #%d: %w", height, err)
}
if paramsInfo.ConsensusParams.Equal(&emptypb) {
paramsInfo2, err := store.loadConsensusParamsInfo(paramsInfo.LastHeightChanged)
if err != nil {
return empty, fmt.Errorf(
"couldn't find consensus params at height %d as last changed from height %d: %w",
paramsInfo.LastHeightChanged,
height,
err,
)
}
paramsInfo = paramsInfo2
}
return types.ConsensusParamsFromProto(paramsInfo.ConsensusParams), nil
}
func (store dbStore) loadConsensusParamsInfo(height int64) (*cmtstate.ConsensusParamsInfo, error) {
buf, err := store.db.Get(calcConsensusParamsKey(height))
if err != nil {
return nil, err
}
if len(buf) == 0 {
return nil, errors.New("value retrieved from db is empty")
}
paramsInfo := new(cmtstate.ConsensusParamsInfo)
if err = paramsInfo.Unmarshal(buf); err != nil {
// DATA HAS BEEN CORRUPTED OR THE SPEC HAS CHANGED
cmtos.Exit(fmt.Sprintf(`LoadConsensusParams: Data has been corrupted or its spec has changed:
%v\n`, err))
}
// TODO: ensure that buf is completely read.
return paramsInfo, nil
}
// saveConsensusParamsInfo persists the consensus params for the next block to disk.
// It should be called from s.Save(), right before the state itself is persisted.
// If the consensus params did not change after processing the latest block,
// only the last height for which they changed is persisted.
func (store dbStore) saveConsensusParamsInfo(nextHeight, changeHeight int64, params types.ConsensusParams) error {
paramsInfo := &cmtstate.ConsensusParamsInfo{
LastHeightChanged: changeHeight,
}
if changeHeight == nextHeight {
paramsInfo.ConsensusParams = params.ToProto()
}
bz, err := paramsInfo.Marshal()
if err != nil {
return err
}
err = store.db.Set(calcConsensusParamsKey(nextHeight), bz)
if err != nil {
return err
}
return nil
}
func (store dbStore) Close() error {
return store.db.Close()
}
func min(a int64, b int64) int64 {
if a < b {
return a
}
return b
}
// responseFinalizeBlockFromLegacy is a convenience function that takes the old abci responses and morphs
// it to the finalize block response. Note that the app hash is missing
func responseFinalizeBlockFromLegacy(legacyResp *cmtstate.LegacyABCIResponses) *abci.ResponseFinalizeBlock {
return &abci.ResponseFinalizeBlock{
TxResults: legacyResp.DeliverTxs,
ValidatorUpdates: legacyResp.EndBlock.ValidatorUpdates,
ConsensusParamUpdates: legacyResp.EndBlock.ConsensusParamUpdates,
Events: append(legacyResp.BeginBlock.Events, legacyResp.EndBlock.Events...),
// NOTE: AppHash is missing in the response but will
// be caught and filled in consensus/replay.go
}
}