You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
268 lines
6.5 KiB
268 lines
6.5 KiB
package lite
|
|
|
|
import (
|
|
"fmt"
|
|
"regexp"
|
|
"strconv"
|
|
|
|
amino "github.com/tendermint/go-amino"
|
|
cryptoAmino "github.com/tendermint/tendermint/crypto/encoding/amino"
|
|
dbm "github.com/tendermint/tendermint/libs/db"
|
|
log "github.com/tendermint/tendermint/libs/log"
|
|
lerr "github.com/tendermint/tendermint/lite/errors"
|
|
"github.com/tendermint/tendermint/types"
|
|
)
|
|
|
|
type DBProvider struct {
|
|
logger log.Logger
|
|
label string
|
|
db dbm.DB
|
|
cdc *amino.Codec
|
|
limit int
|
|
}
|
|
|
|
func NewDBProvider(label string, db dbm.DB) *DBProvider {
|
|
|
|
// NOTE: when debugging, this type of construction might be useful.
|
|
//db = dbm.NewDebugDB("db provider "+cmn.RandStr(4), db)
|
|
|
|
cdc := amino.NewCodec()
|
|
cryptoAmino.RegisterAmino(cdc)
|
|
dbp := &DBProvider{
|
|
logger: log.NewNopLogger(),
|
|
label: label,
|
|
db: db,
|
|
cdc: cdc,
|
|
}
|
|
return dbp
|
|
}
|
|
|
|
func (dbp *DBProvider) SetLogger(logger log.Logger) {
|
|
dbp.logger = logger.With("label", dbp.label)
|
|
}
|
|
|
|
func (dbp *DBProvider) SetLimit(limit int) *DBProvider {
|
|
dbp.limit = limit
|
|
return dbp
|
|
}
|
|
|
|
// Implements PersistentProvider.
|
|
func (dbp *DBProvider) SaveFullCommit(fc FullCommit) error {
|
|
|
|
dbp.logger.Info("DBProvider.SaveFullCommit()...", "fc", fc)
|
|
batch := dbp.db.NewBatch()
|
|
|
|
// Save the fc.validators.
|
|
// We might be overwriting what we already have, but
|
|
// it makes the logic easier for now.
|
|
vsKey := validatorSetKey(fc.ChainID(), fc.Height())
|
|
vsBz, err := dbp.cdc.MarshalBinaryLengthPrefixed(fc.Validators)
|
|
if err != nil {
|
|
return err
|
|
}
|
|
batch.Set(vsKey, vsBz)
|
|
|
|
// Save the fc.NextValidators.
|
|
nvsKey := validatorSetKey(fc.ChainID(), fc.Height()+1)
|
|
nvsBz, err := dbp.cdc.MarshalBinaryLengthPrefixed(fc.NextValidators)
|
|
if err != nil {
|
|
return err
|
|
}
|
|
batch.Set(nvsKey, nvsBz)
|
|
|
|
// Save the fc.SignedHeader
|
|
shKey := signedHeaderKey(fc.ChainID(), fc.Height())
|
|
shBz, err := dbp.cdc.MarshalBinaryLengthPrefixed(fc.SignedHeader)
|
|
if err != nil {
|
|
return err
|
|
}
|
|
batch.Set(shKey, shBz)
|
|
|
|
// And write sync.
|
|
batch.WriteSync()
|
|
|
|
// Garbage collect.
|
|
// TODO: optimize later.
|
|
if dbp.limit > 0 {
|
|
dbp.deleteAfterN(fc.ChainID(), dbp.limit)
|
|
}
|
|
|
|
return nil
|
|
}
|
|
|
|
// Implements Provider.
|
|
func (dbp *DBProvider) LatestFullCommit(chainID string, minHeight, maxHeight int64) (
|
|
FullCommit, error) {
|
|
|
|
dbp.logger.Info("DBProvider.LatestFullCommit()...",
|
|
"chainID", chainID, "minHeight", minHeight, "maxHeight", maxHeight)
|
|
|
|
if minHeight <= 0 {
|
|
minHeight = 1
|
|
}
|
|
if maxHeight == 0 {
|
|
maxHeight = 1<<63 - 1
|
|
}
|
|
|
|
itr := dbp.db.ReverseIterator(
|
|
signedHeaderKey(chainID, minHeight),
|
|
append(signedHeaderKey(chainID, maxHeight), byte(0x00)),
|
|
)
|
|
defer itr.Close()
|
|
|
|
for itr.Valid() {
|
|
key := itr.Key()
|
|
_, _, ok := parseSignedHeaderKey(key)
|
|
if !ok {
|
|
// Skip over other keys.
|
|
itr.Next()
|
|
continue
|
|
} else {
|
|
// Found the latest full commit signed header.
|
|
shBz := itr.Value()
|
|
sh := types.SignedHeader{}
|
|
err := dbp.cdc.UnmarshalBinaryLengthPrefixed(shBz, &sh)
|
|
if err != nil {
|
|
return FullCommit{}, err
|
|
} else {
|
|
lfc, err := dbp.fillFullCommit(sh)
|
|
if err == nil {
|
|
dbp.logger.Info("DBProvider.LatestFullCommit() found latest.", "height", lfc.Height())
|
|
return lfc, nil
|
|
} else {
|
|
dbp.logger.Error("DBProvider.LatestFullCommit() got error", "lfc", lfc)
|
|
dbp.logger.Error(fmt.Sprintf("%+v", err))
|
|
return lfc, err
|
|
}
|
|
}
|
|
}
|
|
}
|
|
return FullCommit{}, lerr.ErrCommitNotFound()
|
|
}
|
|
|
|
func (dbp *DBProvider) ValidatorSet(chainID string, height int64) (valset *types.ValidatorSet, err error) {
|
|
return dbp.getValidatorSet(chainID, height)
|
|
}
|
|
|
|
func (dbp *DBProvider) getValidatorSet(chainID string, height int64) (valset *types.ValidatorSet, err error) {
|
|
vsBz := dbp.db.Get(validatorSetKey(chainID, height))
|
|
if vsBz == nil {
|
|
err = lerr.ErrUnknownValidators(chainID, height)
|
|
return
|
|
}
|
|
err = dbp.cdc.UnmarshalBinaryLengthPrefixed(vsBz, &valset)
|
|
if err != nil {
|
|
return
|
|
}
|
|
|
|
// To test deep equality. This makes it easier to test for e.g. valset
|
|
// equivalence using assert.Equal (tests for deep equality) in our tests,
|
|
// which also tests for unexported/private field equivalence.
|
|
valset.TotalVotingPower()
|
|
|
|
return
|
|
}
|
|
|
|
func (dbp *DBProvider) fillFullCommit(sh types.SignedHeader) (FullCommit, error) {
|
|
var chainID = sh.ChainID
|
|
var height = sh.Height
|
|
var valset, nextValset *types.ValidatorSet
|
|
// Load the validator set.
|
|
valset, err := dbp.getValidatorSet(chainID, height)
|
|
if err != nil {
|
|
return FullCommit{}, err
|
|
}
|
|
// Load the next validator set.
|
|
nextValset, err = dbp.getValidatorSet(chainID, height+1)
|
|
if err != nil {
|
|
return FullCommit{}, err
|
|
}
|
|
// Return filled FullCommit.
|
|
return FullCommit{
|
|
SignedHeader: sh,
|
|
Validators: valset,
|
|
NextValidators: nextValset,
|
|
}, nil
|
|
}
|
|
|
|
func (dbp *DBProvider) deleteAfterN(chainID string, after int) error {
|
|
|
|
dbp.logger.Info("DBProvider.deleteAfterN()...", "chainID", chainID, "after", after)
|
|
|
|
itr := dbp.db.ReverseIterator(
|
|
signedHeaderKey(chainID, 1),
|
|
append(signedHeaderKey(chainID, 1<<63-1), byte(0x00)),
|
|
)
|
|
defer itr.Close()
|
|
|
|
var lastHeight int64 = 1<<63 - 1
|
|
var numSeen = 0
|
|
var numDeleted = 0
|
|
|
|
for itr.Valid() {
|
|
key := itr.Key()
|
|
_, height, ok := parseChainKeyPrefix(key)
|
|
if !ok {
|
|
return fmt.Errorf("unexpected key %v", key)
|
|
} else {
|
|
if height < lastHeight {
|
|
lastHeight = height
|
|
numSeen += 1
|
|
}
|
|
if numSeen > after {
|
|
dbp.db.Delete(key)
|
|
numDeleted += 1
|
|
}
|
|
}
|
|
itr.Next()
|
|
}
|
|
|
|
dbp.logger.Info(fmt.Sprintf("DBProvider.deleteAfterN() deleted %v items", numDeleted))
|
|
return nil
|
|
}
|
|
|
|
//----------------------------------------
|
|
// key encoding
|
|
|
|
func signedHeaderKey(chainID string, height int64) []byte {
|
|
return []byte(fmt.Sprintf("%s/%010d/sh", chainID, height))
|
|
}
|
|
|
|
func validatorSetKey(chainID string, height int64) []byte {
|
|
return []byte(fmt.Sprintf("%s/%010d/vs", chainID, height))
|
|
}
|
|
|
|
//----------------------------------------
|
|
// key parsing
|
|
|
|
var keyPattern = regexp.MustCompile(`^([^/]+)/([0-9]*)/(.*)$`)
|
|
|
|
func parseKey(key []byte) (chainID string, height int64, part string, ok bool) {
|
|
submatch := keyPattern.FindSubmatch(key)
|
|
if submatch == nil {
|
|
return "", 0, "", false
|
|
}
|
|
chainID = string(submatch[1])
|
|
heightStr := string(submatch[2])
|
|
heightInt, err := strconv.Atoi(heightStr)
|
|
if err != nil {
|
|
return "", 0, "", false
|
|
}
|
|
height = int64(heightInt)
|
|
part = string(submatch[3])
|
|
ok = true // good!
|
|
return
|
|
}
|
|
|
|
func parseSignedHeaderKey(key []byte) (chainID string, height int64, ok bool) {
|
|
chainID, height, part, ok := parseKey(key)
|
|
if part != "sh" {
|
|
return "", 0, false
|
|
}
|
|
return chainID, height, true
|
|
}
|
|
|
|
func parseChainKeyPrefix(key []byte) (chainID string, height int64, ok bool) {
|
|
chainID, height, _, ok = parseKey(key)
|
|
return chainID, height, true
|
|
}
|