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.
346 lines
7.0 KiB
346 lines
7.0 KiB
package db
|
|
|
|
import (
|
|
"encoding/binary"
|
|
"fmt"
|
|
"regexp"
|
|
"strconv"
|
|
"sync"
|
|
|
|
"github.com/tendermint/go-amino"
|
|
dbm "github.com/tendermint/tm-db"
|
|
|
|
cryptoAmino "github.com/tendermint/tendermint/crypto/encoding/amino"
|
|
"github.com/tendermint/tendermint/light/store"
|
|
"github.com/tendermint/tendermint/types"
|
|
)
|
|
|
|
var (
|
|
sizeKey = []byte("size")
|
|
)
|
|
|
|
type dbs struct {
|
|
db dbm.DB
|
|
prefix string
|
|
|
|
mtx sync.RWMutex
|
|
size uint16
|
|
|
|
cdc *amino.Codec
|
|
}
|
|
|
|
// New returns a Store that wraps any DB (with an optional prefix in case you
|
|
// want to use one DB with many light clients).
|
|
//
|
|
// Objects are marshalled using amino (github.com/tendermint/go-amino)
|
|
func New(db dbm.DB, prefix string) store.Store {
|
|
cdc := amino.NewCodec()
|
|
cryptoAmino.RegisterAmino(cdc)
|
|
|
|
size := uint16(0)
|
|
bz, err := db.Get(sizeKey)
|
|
if err == nil && len(bz) > 0 {
|
|
size = unmarshalSize(bz)
|
|
}
|
|
|
|
return &dbs{db: db, prefix: prefix, cdc: cdc, size: size}
|
|
}
|
|
|
|
// SaveSignedHeaderAndValidatorSet persists SignedHeader and ValidatorSet to
|
|
// the db.
|
|
//
|
|
// Safe for concurrent use by multiple goroutines.
|
|
func (s *dbs) SaveSignedHeaderAndValidatorSet(sh *types.SignedHeader, valSet *types.ValidatorSet) error {
|
|
if sh.Height <= 0 {
|
|
panic("negative or zero height")
|
|
}
|
|
|
|
shBz, err := s.cdc.MarshalBinaryLengthPrefixed(sh)
|
|
if err != nil {
|
|
return fmt.Errorf("marshalling header: %w", err)
|
|
}
|
|
|
|
valSetBz, err := s.cdc.MarshalBinaryLengthPrefixed(valSet)
|
|
if err != nil {
|
|
return fmt.Errorf("marshalling validator set: %w", err)
|
|
}
|
|
|
|
s.mtx.Lock()
|
|
defer s.mtx.Unlock()
|
|
|
|
b := s.db.NewBatch()
|
|
b.Set(s.shKey(sh.Height), shBz)
|
|
b.Set(s.vsKey(sh.Height), valSetBz)
|
|
b.Set(sizeKey, marshalSize(s.size+1))
|
|
|
|
err = b.WriteSync()
|
|
b.Close()
|
|
|
|
if err == nil {
|
|
s.size++
|
|
}
|
|
|
|
return err
|
|
}
|
|
|
|
// DeleteSignedHeaderAndValidatorSet deletes SignedHeader and ValidatorSet from
|
|
// the db.
|
|
//
|
|
// Safe for concurrent use by multiple goroutines.
|
|
func (s *dbs) DeleteSignedHeaderAndValidatorSet(height int64) error {
|
|
if height <= 0 {
|
|
panic("negative or zero height")
|
|
}
|
|
|
|
s.mtx.Lock()
|
|
defer s.mtx.Unlock()
|
|
|
|
b := s.db.NewBatch()
|
|
b.Delete(s.shKey(height))
|
|
b.Delete(s.vsKey(height))
|
|
b.Set(sizeKey, marshalSize(s.size-1))
|
|
|
|
err := b.WriteSync()
|
|
b.Close()
|
|
|
|
if err == nil {
|
|
s.size--
|
|
}
|
|
|
|
return err
|
|
}
|
|
|
|
// SignedHeader loads SignedHeader at the given height.
|
|
//
|
|
// Safe for concurrent use by multiple goroutines.
|
|
func (s *dbs) SignedHeader(height int64) (*types.SignedHeader, error) {
|
|
if height <= 0 {
|
|
panic("negative or zero height")
|
|
}
|
|
|
|
bz, err := s.db.Get(s.shKey(height))
|
|
if err != nil {
|
|
panic(err)
|
|
}
|
|
if len(bz) == 0 {
|
|
return nil, store.ErrSignedHeaderNotFound
|
|
}
|
|
|
|
var signedHeader *types.SignedHeader
|
|
err = s.cdc.UnmarshalBinaryLengthPrefixed(bz, &signedHeader)
|
|
return signedHeader, err
|
|
}
|
|
|
|
// ValidatorSet loads ValidatorSet at the given height.
|
|
//
|
|
// Safe for concurrent use by multiple goroutines.
|
|
func (s *dbs) ValidatorSet(height int64) (*types.ValidatorSet, error) {
|
|
if height <= 0 {
|
|
panic("negative or zero height")
|
|
}
|
|
|
|
bz, err := s.db.Get(s.vsKey(height))
|
|
if err != nil {
|
|
panic(err)
|
|
}
|
|
if len(bz) == 0 {
|
|
return nil, store.ErrValidatorSetNotFound
|
|
}
|
|
|
|
var valSet *types.ValidatorSet
|
|
err = s.cdc.UnmarshalBinaryLengthPrefixed(bz, &valSet)
|
|
return valSet, err
|
|
}
|
|
|
|
// LastSignedHeaderHeight returns the last SignedHeader height stored.
|
|
//
|
|
// Safe for concurrent use by multiple goroutines.
|
|
func (s *dbs) LastSignedHeaderHeight() (int64, error) {
|
|
itr, err := s.db.ReverseIterator(
|
|
s.shKey(1),
|
|
append(s.shKey(1<<63-1), byte(0x00)),
|
|
)
|
|
if err != nil {
|
|
panic(err)
|
|
}
|
|
defer itr.Close()
|
|
|
|
for itr.Valid() {
|
|
key := itr.Key()
|
|
_, height, ok := parseShKey(key)
|
|
if ok {
|
|
return height, nil
|
|
}
|
|
itr.Next()
|
|
}
|
|
|
|
return -1, nil
|
|
}
|
|
|
|
// FirstSignedHeaderHeight returns the first SignedHeader height stored.
|
|
//
|
|
// Safe for concurrent use by multiple goroutines.
|
|
func (s *dbs) FirstSignedHeaderHeight() (int64, error) {
|
|
itr, err := s.db.Iterator(
|
|
s.shKey(1),
|
|
append(s.shKey(1<<63-1), byte(0x00)),
|
|
)
|
|
if err != nil {
|
|
panic(err)
|
|
}
|
|
defer itr.Close()
|
|
|
|
for itr.Valid() {
|
|
key := itr.Key()
|
|
_, height, ok := parseShKey(key)
|
|
if ok {
|
|
return height, nil
|
|
}
|
|
itr.Next()
|
|
}
|
|
|
|
return -1, nil
|
|
}
|
|
|
|
// SignedHeaderBefore iterates over headers until it finds a header before
|
|
// the given height. It returns ErrSignedHeaderNotFound if no such header exists.
|
|
//
|
|
// Safe for concurrent use by multiple goroutines.
|
|
func (s *dbs) SignedHeaderBefore(height int64) (*types.SignedHeader, error) {
|
|
if height <= 0 {
|
|
panic("negative or zero height")
|
|
}
|
|
|
|
itr, err := s.db.ReverseIterator(
|
|
s.shKey(1),
|
|
s.shKey(height),
|
|
)
|
|
if err != nil {
|
|
panic(err)
|
|
}
|
|
defer itr.Close()
|
|
|
|
for itr.Valid() {
|
|
key := itr.Key()
|
|
_, existingHeight, ok := parseShKey(key)
|
|
if ok {
|
|
return s.SignedHeader(existingHeight)
|
|
}
|
|
itr.Next()
|
|
}
|
|
|
|
return nil, store.ErrSignedHeaderNotFound
|
|
}
|
|
|
|
// Prune prunes header & validator set pairs until there are only size pairs
|
|
// left.
|
|
//
|
|
// Safe for concurrent use by multiple goroutines.
|
|
func (s *dbs) Prune(size uint16) error {
|
|
// 1) Check how many we need to prune.
|
|
s.mtx.RLock()
|
|
sSize := s.size
|
|
s.mtx.RUnlock()
|
|
|
|
if sSize <= size { // nothing to prune
|
|
return nil
|
|
}
|
|
numToPrune := sSize - size
|
|
|
|
// 2) Iterate over headers and perform a batch operation.
|
|
itr, err := s.db.Iterator(
|
|
s.shKey(1),
|
|
append(s.shKey(1<<63-1), byte(0x00)),
|
|
)
|
|
if err != nil {
|
|
panic(err)
|
|
}
|
|
|
|
b := s.db.NewBatch()
|
|
|
|
pruned := 0
|
|
for itr.Valid() && numToPrune > 0 {
|
|
key := itr.Key()
|
|
_, height, ok := parseShKey(key)
|
|
if ok {
|
|
b.Delete(s.shKey(height))
|
|
b.Delete(s.vsKey(height))
|
|
}
|
|
itr.Next()
|
|
numToPrune--
|
|
pruned++
|
|
}
|
|
|
|
itr.Close()
|
|
|
|
err = b.WriteSync()
|
|
b.Close()
|
|
if err != nil {
|
|
return err
|
|
}
|
|
|
|
// 3) Update size.
|
|
s.mtx.Lock()
|
|
defer s.mtx.Unlock()
|
|
|
|
s.size -= uint16(pruned)
|
|
|
|
if wErr := s.db.SetSync(sizeKey, marshalSize(s.size)); wErr != nil {
|
|
return fmt.Errorf("failed to persist size: %w", wErr)
|
|
}
|
|
|
|
return nil
|
|
}
|
|
|
|
// Size returns the number of header & validator set pairs.
|
|
//
|
|
// Safe for concurrent use by multiple goroutines.
|
|
func (s *dbs) Size() uint16 {
|
|
s.mtx.RLock()
|
|
defer s.mtx.RUnlock()
|
|
return s.size
|
|
}
|
|
|
|
func (s *dbs) shKey(height int64) []byte {
|
|
return []byte(fmt.Sprintf("sh/%s/%020d", s.prefix, height))
|
|
}
|
|
|
|
func (s *dbs) vsKey(height int64) []byte {
|
|
return []byte(fmt.Sprintf("vs/%s/%020d", s.prefix, height))
|
|
}
|
|
|
|
var keyPattern = regexp.MustCompile(`^(sh|vs)/([^/]*)/([0-9]+)$`)
|
|
|
|
func parseKey(key []byte) (part string, prefix string, height int64, ok bool) {
|
|
submatch := keyPattern.FindSubmatch(key)
|
|
if submatch == nil {
|
|
return "", "", 0, false
|
|
}
|
|
part = string(submatch[1])
|
|
prefix = string(submatch[2])
|
|
height, err := strconv.ParseInt(string(submatch[3]), 10, 64)
|
|
if err != nil {
|
|
return "", "", 0, false
|
|
}
|
|
ok = true // good!
|
|
return
|
|
}
|
|
|
|
func parseShKey(key []byte) (prefix string, height int64, ok bool) {
|
|
var part string
|
|
part, prefix, height, ok = parseKey(key)
|
|
if part != "sh" {
|
|
return "", 0, false
|
|
}
|
|
return
|
|
}
|
|
|
|
func marshalSize(size uint16) []byte {
|
|
bs := make([]byte, 2)
|
|
binary.LittleEndian.PutUint16(bs, size)
|
|
return bs
|
|
}
|
|
|
|
func unmarshalSize(bz []byte) uint16 {
|
|
return binary.LittleEndian.Uint16(bz)
|
|
}
|