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.
247 lines
6.9 KiB
247 lines
6.9 KiB
package types
|
|
|
|
import (
|
|
"bytes"
|
|
"encoding/json"
|
|
"fmt"
|
|
"io"
|
|
|
|
"github.com/tendermint/tendermint/binary"
|
|
. "github.com/tendermint/tendermint/common"
|
|
dbm "github.com/tendermint/tendermint/db"
|
|
)
|
|
|
|
/*
|
|
Simple low level store for blocks.
|
|
|
|
There are three types of information stored:
|
|
- BlockMeta: Meta information about each block
|
|
- Block part: Parts of each block, aggregated w/ PartSet
|
|
- Validation: The Validation part of each block, for gossiping commit votes
|
|
|
|
Currently the commit signatures are duplicated in the Block parts as
|
|
well as the Validation. In the future this may change, perhaps by moving
|
|
the Validation data outside the Block.
|
|
*/
|
|
type BlockStore struct {
|
|
height uint
|
|
db dbm.DB
|
|
}
|
|
|
|
func NewBlockStore(db dbm.DB) *BlockStore {
|
|
bsjson := LoadBlockStoreStateJSON(db)
|
|
return &BlockStore{
|
|
height: bsjson.Height,
|
|
db: db,
|
|
}
|
|
}
|
|
|
|
// Height() returns the last known contiguous block height.
|
|
func (bs *BlockStore) Height() uint {
|
|
return bs.height
|
|
}
|
|
|
|
func (bs *BlockStore) GetReader(key []byte) io.Reader {
|
|
bytez := bs.db.Get(key)
|
|
if bytez == nil {
|
|
return nil
|
|
}
|
|
return bytes.NewReader(bytez)
|
|
}
|
|
|
|
func (bs *BlockStore) LoadBlock(height uint) *Block {
|
|
var n int64
|
|
var err error
|
|
r := bs.GetReader(calcBlockMetaKey(height))
|
|
if r == nil {
|
|
panic(Fmt("Block does not exist at height %v", height))
|
|
}
|
|
meta := binary.ReadBinary(&BlockMeta{}, r, &n, &err).(*BlockMeta)
|
|
if err != nil {
|
|
panic(Fmt("Error reading block meta: %v", err))
|
|
}
|
|
bytez := []byte{}
|
|
for i := uint(0); i < meta.Parts.Total; i++ {
|
|
part := bs.LoadBlockPart(height, i)
|
|
bytez = append(bytez, part.Bytes...)
|
|
}
|
|
block := binary.ReadBinary(&Block{}, bytes.NewReader(bytez), &n, &err).(*Block)
|
|
if err != nil {
|
|
panic(Fmt("Error reading block: %v", err))
|
|
}
|
|
return block
|
|
}
|
|
|
|
func (bs *BlockStore) LoadBlockPart(height uint, index uint) *Part {
|
|
var n int64
|
|
var err error
|
|
r := bs.GetReader(calcBlockPartKey(height, index))
|
|
if r == nil {
|
|
panic(Fmt("BlockPart does not exist for height %v index %v", height, index))
|
|
}
|
|
part := binary.ReadBinary(&Part{}, r, &n, &err).(*Part)
|
|
if err != nil {
|
|
panic(Fmt("Error reading block part: %v", err))
|
|
}
|
|
return part
|
|
}
|
|
|
|
func (bs *BlockStore) LoadBlockMeta(height uint) *BlockMeta {
|
|
var n int64
|
|
var err error
|
|
r := bs.GetReader(calcBlockMetaKey(height))
|
|
if r == nil {
|
|
panic(Fmt("BlockMeta does not exist for height %v", height))
|
|
}
|
|
meta := binary.ReadBinary(&BlockMeta{}, r, &n, &err).(*BlockMeta)
|
|
if err != nil {
|
|
panic(Fmt("Error reading block meta: %v", err))
|
|
}
|
|
return meta
|
|
}
|
|
|
|
// NOTE: the Commit-vote heights are for the block at `height-1`
|
|
// Since these are included in the subsequent block, the height
|
|
// is off by 1.
|
|
func (bs *BlockStore) LoadBlockValidation(height uint) *Validation {
|
|
var n int64
|
|
var err error
|
|
r := bs.GetReader(calcBlockValidationKey(height))
|
|
if r == nil {
|
|
panic(Fmt("BlockValidation does not exist for height %v", height))
|
|
}
|
|
validation := binary.ReadBinary(&Validation{}, r, &n, &err).(*Validation)
|
|
if err != nil {
|
|
panic(Fmt("Error reading validation: %v", err))
|
|
}
|
|
return validation
|
|
}
|
|
|
|
// NOTE: the Commit-vote heights are for the block at `height`
|
|
func (bs *BlockStore) LoadSeenValidation(height uint) *Validation {
|
|
var n int64
|
|
var err error
|
|
r := bs.GetReader(calcSeenValidationKey(height))
|
|
if r == nil {
|
|
panic(Fmt("SeenValidation does not exist for height %v", height))
|
|
}
|
|
validation := binary.ReadBinary(&Validation{}, r, &n, &err).(*Validation)
|
|
if err != nil {
|
|
panic(Fmt("Error reading validation: %v", err))
|
|
}
|
|
return validation
|
|
}
|
|
|
|
// blockParts: Must be parts of the block
|
|
// seenValidation: The +2/3 commits that were seen which finalized the height.
|
|
// If all the nodes restart after committing a block,
|
|
// we need this to reload the commits to catch-up nodes to the
|
|
// most recent height. Otherwise they'd stall at H-1.
|
|
// Also good to have to debug consensus issues & punish wrong-signers
|
|
// whose commits weren't included in the block.
|
|
func (bs *BlockStore) SaveBlock(block *Block, blockParts *PartSet, seenValidation *Validation) {
|
|
height := block.Height
|
|
if height != bs.height+1 {
|
|
panic(Fmt("BlockStore can only save contiguous blocks. Wanted %v, got %v", bs.height+1, height))
|
|
}
|
|
if !blockParts.IsComplete() {
|
|
panic(Fmt("BlockStore can only save complete block part sets"))
|
|
}
|
|
|
|
// Save block meta
|
|
meta := makeBlockMeta(block, blockParts)
|
|
metaBytes := binary.BinaryBytes(meta)
|
|
bs.db.Set(calcBlockMetaKey(height), metaBytes)
|
|
|
|
// Save block parts
|
|
for i := uint(0); i < blockParts.Total(); i++ {
|
|
bs.saveBlockPart(height, i, blockParts.GetPart(i))
|
|
}
|
|
|
|
// Save block validation (duplicate and separate from the Block)
|
|
blockValidationBytes := binary.BinaryBytes(block.Validation)
|
|
bs.db.Set(calcBlockValidationKey(height), blockValidationBytes)
|
|
|
|
// Save seen validation (seen +2/3 commits)
|
|
seenValidationBytes := binary.BinaryBytes(seenValidation)
|
|
bs.db.Set(calcSeenValidationKey(height), seenValidationBytes)
|
|
|
|
// Save new BlockStoreStateJSON descriptor
|
|
BlockStoreStateJSON{Height: height}.Save(bs.db)
|
|
|
|
// Done!
|
|
bs.height = height
|
|
}
|
|
|
|
func (bs *BlockStore) saveBlockPart(height uint, index uint, part *Part) {
|
|
if height != bs.height+1 {
|
|
panic(Fmt("BlockStore can only save contiguous blocks. Wanted %v, got %v", bs.height+1, height))
|
|
}
|
|
partBytes := binary.BinaryBytes(part)
|
|
bs.db.Set(calcBlockPartKey(height, index), partBytes)
|
|
}
|
|
|
|
//-----------------------------------------------------------------------------
|
|
|
|
type BlockMeta struct {
|
|
Hash []byte // The block hash
|
|
Header *Header // The block's Header
|
|
Parts PartSetHeader // The PartSetHeader, for transfer
|
|
}
|
|
|
|
func makeBlockMeta(block *Block, blockParts *PartSet) *BlockMeta {
|
|
return &BlockMeta{
|
|
Hash: block.Hash(),
|
|
Header: block.Header,
|
|
Parts: blockParts.Header(),
|
|
}
|
|
}
|
|
|
|
//-----------------------------------------------------------------------------
|
|
|
|
func calcBlockMetaKey(height uint) []byte {
|
|
return []byte(fmt.Sprintf("H:%v", height))
|
|
}
|
|
|
|
func calcBlockPartKey(height uint, partIndex uint) []byte {
|
|
return []byte(fmt.Sprintf("P:%v:%v", height, partIndex))
|
|
}
|
|
|
|
func calcBlockValidationKey(height uint) []byte {
|
|
return []byte(fmt.Sprintf("V:%v", height))
|
|
}
|
|
|
|
func calcSeenValidationKey(height uint) []byte {
|
|
return []byte(fmt.Sprintf("SV:%v", height))
|
|
}
|
|
|
|
//-----------------------------------------------------------------------------
|
|
|
|
var blockStoreKey = []byte("blockStore")
|
|
|
|
type BlockStoreStateJSON struct {
|
|
Height uint
|
|
}
|
|
|
|
func (bsj BlockStoreStateJSON) Save(db dbm.DB) {
|
|
bytes, err := json.Marshal(bsj)
|
|
if err != nil {
|
|
panic(Fmt("Could not marshal state bytes: %v", err))
|
|
}
|
|
db.Set(blockStoreKey, bytes)
|
|
}
|
|
|
|
func LoadBlockStoreStateJSON(db dbm.DB) BlockStoreStateJSON {
|
|
bytes := db.Get(blockStoreKey)
|
|
if bytes == nil {
|
|
return BlockStoreStateJSON{
|
|
Height: 0,
|
|
}
|
|
}
|
|
bsj := BlockStoreStateJSON{}
|
|
err := json.Unmarshal(bytes, &bsj)
|
|
if err != nil {
|
|
panic(Fmt("Could not unmarshal bytes: %X", bytes))
|
|
}
|
|
return bsj
|
|
}
|