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light: light chain, VM env and tx pool

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This commit is contained in:
Zsolt Felfoldi
2016-10-14 05:47:09 +02:00
committed by Felix Lange
parent 8b1df1a259
commit 760fd65487
15 changed files with 2645 additions and 127 deletions
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58
core/blockchain.go
View File

@@ -632,6 +632,37 @@ func (self *BlockChain) Rollback(chain []common.Hash) {
}
}
// SetReceiptsData computes all the non-consensus fields of the receipts
func SetReceiptsData(block *types.Block, receipts types.Receipts) {
transactions, logIndex := block.Transactions(), uint(0)
for j := 0; j < len(receipts); j++ {
// The transaction hash can be retrieved from the transaction itself
receipts[j].TxHash = transactions[j].Hash()
// The contract address can be derived from the transaction itself
if MessageCreatesContract(transactions[j]) {
from, _ := transactions[j].From()
receipts[j].ContractAddress = crypto.CreateAddress(from, transactions[j].Nonce())
}
// The used gas can be calculated based on previous receipts
if j == 0 {
receipts[j].GasUsed = new(big.Int).Set(receipts[j].CumulativeGasUsed)
} else {
receipts[j].GasUsed = new(big.Int).Sub(receipts[j].CumulativeGasUsed, receipts[j-1].CumulativeGasUsed)
}
// The derived log fields can simply be set from the block and transaction
for k := 0; k < len(receipts[j].Logs); k++ {
receipts[j].Logs[k].BlockNumber = block.NumberU64()
receipts[j].Logs[k].BlockHash = block.Hash()
receipts[j].Logs[k].TxHash = receipts[j].TxHash
receipts[j].Logs[k].TxIndex = uint(j)
receipts[j].Logs[k].Index = logIndex
logIndex++
}
}
}
// InsertReceiptChain attempts to complete an already existing header chain with
// transaction and receipt data.
func (self *BlockChain) InsertReceiptChain(blockChain types.Blocks, receiptChain []types.Receipts) (int, error) {
@@ -673,32 +704,7 @@ func (self *BlockChain) InsertReceiptChain(blockChain types.Blocks, receiptChain
continue
}
// Compute all the non-consensus fields of the receipts
transactions, logIndex := block.Transactions(), uint(0)
for j := 0; j < len(receipts); j++ {
// The transaction hash can be retrieved from the transaction itself
receipts[j].TxHash = transactions[j].Hash()
// The contract address can be derived from the transaction itself
if MessageCreatesContract(transactions[j]) {
from, _ := transactions[j].From()
receipts[j].ContractAddress = crypto.CreateAddress(from, transactions[j].Nonce())
}
// The used gas can be calculated based on previous receipts
if j == 0 {
receipts[j].GasUsed = new(big.Int).Set(receipts[j].CumulativeGasUsed)
} else {
receipts[j].GasUsed = new(big.Int).Sub(receipts[j].CumulativeGasUsed, receipts[j-1].CumulativeGasUsed)
}
// The derived log fields can simply be set from the block and transaction
for k := 0; k < len(receipts[j].Logs); k++ {
receipts[j].Logs[k].BlockNumber = block.NumberU64()
receipts[j].Logs[k].BlockHash = block.Hash()
receipts[j].Logs[k].TxHash = receipts[j].TxHash
receipts[j].Logs[k].TxIndex = uint(j)
receipts[j].Logs[k].Index = logIndex
logIndex++
}
}
SetReceiptsData(block, receipts)
// Write all the data out into the database
if err := WriteBody(self.chainDb, block.Hash(), block.NumberU64(), block.Body()); err != nil {
errs[index] = fmt.Errorf("failed to write block body: %v", err)

44
core/database_util.go
View File

@@ -347,8 +347,13 @@ func WriteBody(db ethdb.Database, hash common.Hash, number uint64, body *types.B
if err != nil {
return err
}
return WriteBodyRLP(db, hash, number, data)
}
// WriteBodyRLP writes a serialized body of a block into the database.
func WriteBodyRLP(db ethdb.Database, hash common.Hash, number uint64, rlp rlp.RawValue) error {
key := append(append(bodyPrefix, encodeBlockNumber(number)...), hash.Bytes()...)
if err := db.Put(key, data); err != nil {
if err := db.Put(key, rlp); err != nil {
glog.Fatalf("failed to store block body into database: %v", err)
}
glog.V(logger.Debug).Infof("stored block body [%x…]", hash.Bytes()[:4])
@@ -446,6 +451,16 @@ func WriteTransactions(db ethdb.Database, block *types.Block) error {
return nil
}
// WriteReceipt stores a single transaction receipt into the database.
func WriteReceipt(db ethdb.Database, receipt *types.Receipt) error {
storageReceipt := (*types.ReceiptForStorage)(receipt)
data, err := rlp.EncodeToBytes(storageReceipt)
if err != nil {
return err
}
return db.Put(append(receiptsPrefix, receipt.TxHash.Bytes()...), data)
}
// WriteReceipts stores a batch of transaction receipts into the database.
func WriteReceipts(db ethdb.Database, receipts types.Receipts) error {
batch := db.NewBatch()
@@ -614,3 +629,30 @@ func GetChainConfig(db ethdb.Database, hash common.Hash) (*ChainConfig, error) {
return &config, nil
}
// FindCommonAncestor returns the last common ancestor of two block headers
func FindCommonAncestor(db ethdb.Database, a, b *types.Header) *types.Header {
for a.GetNumberU64() > b.GetNumberU64() {
a = GetHeader(db, a.ParentHash, a.GetNumberU64()-1)
if a == nil {
return nil
}
}
for a.GetNumberU64() < b.GetNumberU64() {
b = GetHeader(db, b.ParentHash, b.GetNumberU64()-1)
if b == nil {
return nil
}
}
for a.Hash() != b.Hash() {
a = GetHeader(db, a.ParentHash, a.GetNumberU64()-1)
if a == nil {
return nil
}
b = GetHeader(db, b.ParentHash, b.GetNumberU64()-1)
if b == nil {
return nil
}
}
return a
}

9
core/types/block.go
View File

@@ -116,6 +116,15 @@ type jsonHeader struct {
Nonce *BlockNonce `json:"nonce"`
}
func (h *Header) GetNumber() *big.Int { return new(big.Int).Set(h.Number) }
func (h *Header) GetGasLimit() *big.Int { return new(big.Int).Set(h.GasLimit) }
func (h *Header) GetGasUsed() *big.Int { return new(big.Int).Set(h.GasUsed) }
func (h *Header) GetDifficulty() *big.Int { return new(big.Int).Set(h.Difficulty) }
func (h *Header) GetTime() *big.Int { return new(big.Int).Set(h.Time) }
func (h *Header) GetNumberU64() uint64 { return h.Number.Uint64() }
func (h *Header) GetNonce() uint64 { return binary.BigEndian.Uint64(h.Nonce[:]) }
func (h *Header) GetExtra() []byte { return common.CopyBytes(h.Extra) }
// Hash returns the block hash of the header, which is simply the keccak256 hash of its
// RLP encoding.
func (h *Header) Hash() common.Hash {

505
light/lightchain.go Normal file
View File

@@ -0,0 +1,505 @@
// Copyright 2015 The go-ethereum Authors
// This file is part of the go-ethereum library.
//
// The go-ethereum library is free software: you can redistribute it and/or modify
// it under the terms of the GNU Lesser General Public License as published by
// the Free Software Foundation, either version 3 of the License, or
// (at your option) any later version.
//
// The go-ethereum library is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
// GNU Lesser General Public License for more details.
//
// You should have received a copy of the GNU Lesser General Public License
// along with the go-ethereum library. If not, see <http://www.gnu.org/licenses/>.
package light
import (
"math/big"
"sync"
"sync/atomic"
"time"
"github.com/ethereum/go-ethereum/common"
"github.com/ethereum/go-ethereum/core"
"github.com/ethereum/go-ethereum/core/types"
"github.com/ethereum/go-ethereum/ethdb"
"github.com/ethereum/go-ethereum/event"
"github.com/ethereum/go-ethereum/logger"
"github.com/ethereum/go-ethereum/logger/glog"
"github.com/ethereum/go-ethereum/pow"
"github.com/ethereum/go-ethereum/rlp"
"github.com/hashicorp/golang-lru"
"golang.org/x/net/context"
)
var (
bodyCacheLimit = 256
blockCacheLimit = 256
)
// LightChain represents a canonical chain that by default only handles block
// headers, downloading block bodies and receipts on demand through an ODR
// interface. It only does header validation during chain insertion.
type LightChain struct {
hc *core.HeaderChain
chainDb ethdb.Database
odr OdrBackend
eventMux *event.TypeMux
genesisBlock *types.Block
mu sync.RWMutex
chainmu sync.RWMutex
procmu sync.RWMutex
bodyCache *lru.Cache // Cache for the most recent block bodies
bodyRLPCache *lru.Cache // Cache for the most recent block bodies in RLP encoded format
blockCache *lru.Cache // Cache for the most recent entire blocks
quit chan struct{}
running int32 // running must be called automically
// procInterrupt must be atomically called
procInterrupt int32 // interrupt signaler for block processing
wg sync.WaitGroup
pow pow.PoW
validator core.HeaderValidator
}
// NewLightChain returns a fully initialised light chain using information
// available in the database. It initialises the default Ethereum header
// validator.
func NewLightChain(odr OdrBackend, config *core.ChainConfig, pow pow.PoW, mux *event.TypeMux) (*LightChain, error) {
bodyCache, _ := lru.New(bodyCacheLimit)
bodyRLPCache, _ := lru.New(bodyCacheLimit)
blockCache, _ := lru.New(blockCacheLimit)
bc := &LightChain{
chainDb: odr.Database(),
odr: odr,
eventMux: mux,
quit: make(chan struct{}),
bodyCache: bodyCache,
bodyRLPCache: bodyRLPCache,
blockCache: blockCache,
pow: pow,
}
var err error
bc.hc, err = core.NewHeaderChain(odr.Database(), config, bc.Validator, bc.getProcInterrupt)
bc.SetValidator(core.NewHeaderValidator(config, bc.hc, pow))
if err != nil {
return nil, err
}
bc.genesisBlock, _ = bc.GetBlockByNumber(NoOdr, 0)
if bc.genesisBlock == nil {
bc.genesisBlock, err = core.WriteDefaultGenesisBlock(odr.Database())
if err != nil {
return nil, err
}
glog.V(logger.Info).Infoln("WARNING: Wrote default ethereum genesis block")
}
if bc.genesisBlock.Hash() == (common.Hash{212, 229, 103, 64, 248, 118, 174, 248, 192, 16, 184, 106, 64, 213, 245, 103, 69, 161, 24, 208, 144, 106, 52, 230, 154, 236, 140, 13, 177, 203, 143, 163}) {
// add trusted CHT
if config.DAOForkSupport {
WriteTrustedCht(bc.chainDb, TrustedCht{
Number: 564,
Root: common.HexToHash("ee31f7fc21f627dc2b8d3ed8fed5b74dbc393d146a67249a656e163148e39016"),
})
} else {
WriteTrustedCht(bc.chainDb, TrustedCht{
Number: 523,
Root: common.HexToHash("c035076523faf514038f619715de404a65398c51899b5dccca9c05b00bc79315"),
})
}
glog.V(logger.Info).Infoln("Added trusted CHT for mainnet")
} else {
if bc.genesisBlock.Hash() == (common.Hash{12, 215, 134, 162, 66, 93, 22, 241, 82, 198, 88, 49, 108, 66, 62, 108, 225, 24, 30, 21, 195, 41, 88, 38, 215, 201, 144, 76, 186, 156, 227, 3}) {
// add trusted CHT for testnet
WriteTrustedCht(bc.chainDb, TrustedCht{
Number: 319,
Root: common.HexToHash("43b679ff9b4918b0b19e6256f20e35877365ec3e20b38e3b2a02cef5606176dc"),
})
glog.V(logger.Info).Infoln("Added trusted CHT for testnet")
} else {
DeleteTrustedCht(bc.chainDb)
}
}
if err := bc.loadLastState(); err != nil {
return nil, err
}
// Check the current state of the block hashes and make sure that we do not have any of the bad blocks in our chain
for hash, _ := range core.BadHashes {
if header := bc.GetHeaderByHash(hash); header != nil {
glog.V(logger.Error).Infof("Found bad hash, rewinding chain to block #%d [%x…]", header.Number, header.ParentHash[:4])
bc.SetHead(header.Number.Uint64() - 1)
glog.V(logger.Error).Infoln("Chain rewind was successful, resuming normal operation")
}
}
return bc, nil
}
func (self *LightChain) getProcInterrupt() bool {
return atomic.LoadInt32(&self.procInterrupt) == 1
}
// Odr returns the ODR backend of the chain
func (self *LightChain) Odr() OdrBackend {
return self.odr
}
// loadLastState loads the last known chain state from the database. This method
// assumes that the chain manager mutex is held.
func (self *LightChain) loadLastState() error {
if head := core.GetHeadHeaderHash(self.chainDb); head == (common.Hash{}) {
// Corrupt or empty database, init from scratch
self.Reset()
} else {
if header := self.GetHeaderByHash(head); header != nil {
self.hc.SetCurrentHeader(header)
}
}
// Issue a status log and return
header := self.hc.CurrentHeader()
headerTd := self.GetTd(header.Hash(), header.Number.Uint64())
glog.V(logger.Info).Infof("Last header: #%d [%x…] TD=%v", self.hc.CurrentHeader().Number, self.hc.CurrentHeader().Hash().Bytes()[:4], headerTd)
return nil
}
// SetHead rewinds the local chain to a new head. Everything above the new
// head will be deleted and the new one set.
func (bc *LightChain) SetHead(head uint64) {
bc.mu.Lock()
defer bc.mu.Unlock()
bc.hc.SetHead(head, nil)
bc.loadLastState()
}
// GasLimit returns the gas limit of the current HEAD block.
func (self *LightChain) GasLimit() *big.Int {
self.mu.RLock()
defer self.mu.RUnlock()
return self.hc.CurrentHeader().GasLimit
}
// LastBlockHash return the hash of the HEAD block.
func (self *LightChain) LastBlockHash() common.Hash {
self.mu.RLock()
defer self.mu.RUnlock()
return self.hc.CurrentHeader().Hash()
}
// Status returns status information about the current chain such as the HEAD Td,
// the HEAD hash and the hash of the genesis block.
func (self *LightChain) Status() (td *big.Int, currentBlock common.Hash, genesisBlock common.Hash) {
self.mu.RLock()
defer self.mu.RUnlock()
header := self.hc.CurrentHeader()
hash := header.Hash()
return self.GetTd(hash, header.Number.Uint64()), hash, self.genesisBlock.Hash()
}
// SetValidator sets the validator which is used to validate incoming headers.
func (self *LightChain) SetValidator(validator core.HeaderValidator) {
self.procmu.Lock()
defer self.procmu.Unlock()
self.validator = validator
}
// Validator returns the current header validator.
func (self *LightChain) Validator() core.HeaderValidator {
self.procmu.RLock()
defer self.procmu.RUnlock()
return self.validator
}
// State returns a new mutable state based on the current HEAD block.
func (self *LightChain) State() *LightState {
return NewLightState(StateTrieID(self.hc.CurrentHeader()), self.odr)
}
// Reset purges the entire blockchain, restoring it to its genesis state.
func (bc *LightChain) Reset() {
bc.ResetWithGenesisBlock(bc.genesisBlock)
}
// ResetWithGenesisBlock purges the entire blockchain, restoring it to the
// specified genesis state.
func (bc *LightChain) ResetWithGenesisBlock(genesis *types.Block) {
// Dump the entire block chain and purge the caches
bc.SetHead(0)
bc.mu.Lock()
defer bc.mu.Unlock()
// Prepare the genesis block and reinitialise the chain
if err := core.WriteTd(bc.chainDb, genesis.Hash(), genesis.NumberU64(), genesis.Difficulty()); err != nil {
glog.Fatalf("failed to write genesis block TD: %v", err)
}
if err := core.WriteBlock(bc.chainDb, genesis); err != nil {
glog.Fatalf("failed to write genesis block: %v", err)
}
bc.genesisBlock = genesis
bc.hc.SetGenesis(bc.genesisBlock.Header())
bc.hc.SetCurrentHeader(bc.genesisBlock.Header())
}
// Accessors
// Genesis returns the genesis block
func (bc *LightChain) Genesis() *types.Block {
return bc.genesisBlock
}
// GetBody retrieves a block body (transactions and uncles) from the database
// or ODR service by hash, caching it if found.
func (self *LightChain) GetBody(ctx context.Context, hash common.Hash) (*types.Body, error) {
// Short circuit if the body's already in the cache, retrieve otherwise
if cached, ok := self.bodyCache.Get(hash); ok {
body := cached.(*types.Body)
return body, nil
}
body, err := GetBody(ctx, self.odr, hash, self.hc.GetBlockNumber(hash))
if err != nil {
return nil, err
}
// Cache the found body for next time and return
self.bodyCache.Add(hash, body)
return body, nil
}
// GetBodyRLP retrieves a block body in RLP encoding from the database or
// ODR service by hash, caching it if found.
func (self *LightChain) GetBodyRLP(ctx context.Context, hash common.Hash) (rlp.RawValue, error) {
// Short circuit if the body's already in the cache, retrieve otherwise
if cached, ok := self.bodyRLPCache.Get(hash); ok {
return cached.(rlp.RawValue), nil
}
body, err := GetBodyRLP(ctx, self.odr, hash, self.hc.GetBlockNumber(hash))
if err != nil {
return nil, err
}
// Cache the found body for next time and return
self.bodyRLPCache.Add(hash, body)
return body, nil
}
// HasBlock checks if a block is fully present in the database or not, caching
// it if present.
func (bc *LightChain) HasBlock(hash common.Hash) bool {
blk, _ := bc.GetBlockByHash(NoOdr, hash)
return blk != nil
}
// GetBlock retrieves a block from the database or ODR service by hash and number,
// caching it if found.
func (self *LightChain) GetBlock(ctx context.Context, hash common.Hash, number uint64) (*types.Block, error) {
// Short circuit if the block's already in the cache, retrieve otherwise
if block, ok := self.blockCache.Get(hash); ok {
return block.(*types.Block), nil
}
block, err := GetBlock(ctx, self.odr, hash, number)
if err != nil {
return nil, err
}
// Cache the found block for next time and return
self.blockCache.Add(block.Hash(), block)
return block, nil
}
// GetBlockByHash retrieves a block from the database or ODR service by hash,
// caching it if found.
func (self *LightChain) GetBlockByHash(ctx context.Context, hash common.Hash) (*types.Block, error) {
return self.GetBlock(ctx, hash, self.hc.GetBlockNumber(hash))
}
// GetBlockByNumber retrieves a block from the database or ODR service by
// number, caching it (associated with its hash) if found.
func (self *LightChain) GetBlockByNumber(ctx context.Context, number uint64) (*types.Block, error) {
hash, err := GetCanonicalHash(ctx, self.odr, number)
if hash == (common.Hash{}) || err != nil {
return nil, err
}
return self.GetBlock(ctx, hash, number)
}
// Stop stops the blockchain service. If any imports are currently in progress
// it will abort them using the procInterrupt.
func (bc *LightChain) Stop() {
if !atomic.CompareAndSwapInt32(&bc.running, 0, 1) {
return
}
close(bc.quit)
atomic.StoreInt32(&bc.procInterrupt, 1)
bc.wg.Wait()
glog.V(logger.Info).Infoln("Chain manager stopped")
}
// Rollback is designed to remove a chain of links from the database that aren't
// certain enough to be valid.
func (self *LightChain) Rollback(chain []common.Hash) {
self.mu.Lock()
defer self.mu.Unlock()
for i := len(chain) - 1; i >= 0; i-- {
hash := chain[i]
if head := self.hc.CurrentHeader(); head.Hash() == hash {
self.hc.SetCurrentHeader(self.GetHeader(head.ParentHash, head.Number.Uint64()-1))
}
}
}
// postChainEvents iterates over the events generated by a chain insertion and
// posts them into the event mux.
func (self *LightChain) postChainEvents(events []interface{}) {
for _, event := range events {
if event, ok := event.(core.ChainEvent); ok {
if self.LastBlockHash() == event.Hash {
self.eventMux.Post(core.ChainHeadEvent{Block: event.Block})
}
}
// Fire the insertion events individually too
self.eventMux.Post(event)
}
}
// InsertHeaderChain attempts to insert the given header chain in to the local
// chain, possibly creating a reorg. If an error is returned, it will return the
// index number of the failing header as well an error describing what went wrong.
//
// The verify parameter can be used to fine tune whether nonce verification
// should be done or not. The reason behind the optional check is because some
// of the header retrieval mechanisms already need to verfy nonces, as well as
// because nonces can be verified sparsely, not needing to check each.
//
// In the case of a light chain, InsertHeaderChain also creates and posts light
// chain events when necessary.
func (self *LightChain) InsertHeaderChain(chain []*types.Header, checkFreq int) (int, error) {
// Make sure only one thread manipulates the chain at once
self.chainmu.Lock()
defer self.chainmu.Unlock()
self.wg.Add(1)
defer self.wg.Done()
var events []interface{}
whFunc := func(header *types.Header) error {
self.mu.Lock()
defer self.mu.Unlock()
status, err := self.hc.WriteHeader(header)
switch status {
case core.CanonStatTy:
if glog.V(logger.Debug) {
glog.Infof("[%v] inserted header #%d (%x...).\n", time.Now().UnixNano(), header.Number, header.Hash().Bytes()[0:4])
}
events = append(events, core.ChainEvent{Block: types.NewBlockWithHeader(header), Hash: header.Hash()})
case core.SideStatTy:
if glog.V(logger.Detail) {
glog.Infof("inserted forked header #%d (TD=%v) (%x...).\n", header.Number, header.Difficulty, header.Hash().Bytes()[0:4])
}
events = append(events, core.ChainSideEvent{Block: types.NewBlockWithHeader(header)})
case core.SplitStatTy:
events = append(events, core.ChainSplitEvent{Block: types.NewBlockWithHeader(header)})
}
return err
}
i, err := self.hc.InsertHeaderChain(chain, checkFreq, whFunc)
go self.postChainEvents(events)
return i, err
}
// CurrentHeader retrieves the current head header of the canonical chain. The
// header is retrieved from the HeaderChain's internal cache.
func (self *LightChain) CurrentHeader() *types.Header {
self.mu.RLock()
defer self.mu.RUnlock()
return self.hc.CurrentHeader()
}
// GetTd retrieves a block's total difficulty in the canonical chain from the
// database by hash and number, caching it if found.
func (self *LightChain) GetTd(hash common.Hash, number uint64) *big.Int {
return self.hc.GetTd(hash, number)
}
// GetTdByHash retrieves a block's total difficulty in the canonical chain from the
// database by hash, caching it if found.
func (self *LightChain) GetTdByHash(hash common.Hash) *big.Int {
return self.hc.GetTdByHash(hash)
}
// GetHeader retrieves a block header from the database by hash and number,
// caching it if found.
func (self *LightChain) GetHeader(hash common.Hash, number uint64) *types.Header {
return self.hc.GetHeader(hash, number)
}
// GetHeaderByHash retrieves a block header from the database by hash, caching it if
// found.
func (self *LightChain) GetHeaderByHash(hash common.Hash) *types.Header {
return self.hc.GetHeaderByHash(hash)
}
// HasHeader checks if a block header is present in the database or not, caching
// it if present.
func (bc *LightChain) HasHeader(hash common.Hash) bool {
return bc.hc.HasHeader(hash)
}
// GetBlockHashesFromHash retrieves a number of block hashes starting at a given
// hash, fetching towards the genesis block.
func (self *LightChain) GetBlockHashesFromHash(hash common.Hash, max uint64) []common.Hash {
return self.hc.GetBlockHashesFromHash(hash, max)
}
// GetHeaderByNumber retrieves a block header from the database by number,
// caching it (associated with its hash) if found.
func (self *LightChain) GetHeaderByNumber(number uint64) *types.Header {
return self.hc.GetHeaderByNumber(number)
}
// GetHeaderByNumberOdr retrieves a block header from the database or network
// by number, caching it (associated with its hash) if found.
func (self *LightChain) GetHeaderByNumberOdr(ctx context.Context, number uint64) (*types.Header, error) {
if header := self.hc.GetHeaderByNumber(number); header != nil {
return header, nil
}
return GetHeaderByNumber(ctx, self.odr, number)
}
func (self *LightChain) SyncCht(ctx context.Context) bool {
headNum := self.CurrentHeader().Number.Uint64()
cht := GetTrustedCht(self.chainDb)
if headNum+1 < cht.Number*ChtFrequency {
num := cht.Number*ChtFrequency - 1
header, err := GetHeaderByNumber(ctx, self.odr, num)
if header != nil && err == nil {
self.mu.Lock()
if self.hc.CurrentHeader().Number.Uint64() < header.Number.Uint64() {
self.hc.SetCurrentHeader(header)
}
self.mu.Unlock()
return true
}
}
return false
}

403
light/lightchain_test.go Normal file
View File

@@ -0,0 +1,403 @@
// Copyright 2014 The go-ethereum Authors
// This file is part of the go-ethereum library.
//
// The go-ethereum library is free software: you can redistribute it and/or modify
// it under the terms of the GNU Lesser General Public License as published by
// the Free Software Foundation, either version 3 of the License, or
// (at your option) any later version.
//
// The go-ethereum library is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
// GNU Lesser General Public License for more details.
//
// You should have received a copy of the GNU Lesser General Public License
// along with the go-ethereum library. If not, see <http://www.gnu.org/licenses/>.
package light
import (
"fmt"
"math/big"
"runtime"
"testing"
"github.com/ethereum/ethash"
"github.com/ethereum/go-ethereum/common"
"github.com/ethereum/go-ethereum/core"
"github.com/ethereum/go-ethereum/core/types"
"github.com/ethereum/go-ethereum/ethdb"
"github.com/ethereum/go-ethereum/event"
"github.com/ethereum/go-ethereum/pow"
"github.com/hashicorp/golang-lru"
"golang.org/x/net/context"
)
// So we can deterministically seed different blockchains
var (
canonicalSeed = 1
forkSeed = 2
)
// makeHeaderChain creates a deterministic chain of headers rooted at parent.
func makeHeaderChain(parent *types.Header, n int, db ethdb.Database, seed int) []*types.Header {
blocks, _ := core.GenerateChain(nil, types.NewBlockWithHeader(parent), db, n, func(i int, b *core.BlockGen) {
b.SetCoinbase(common.Address{0: byte(seed), 19: byte(i)})
})
headers := make([]*types.Header, len(blocks))
for i, block := range blocks {
headers[i] = block.Header()
}
return headers
}
func testChainConfig() *core.ChainConfig {
return &core.ChainConfig{HomesteadBlock: big.NewInt(0)}
}
// newCanonical creates a chain database, and injects a deterministic canonical
// chain. Depending on the full flag, if creates either a full block chain or a
// header only chain.
func newCanonical(n int) (ethdb.Database, *LightChain, error) {
// Create te new chain database
db, _ := ethdb.NewMemDatabase()
evmux := &event.TypeMux{}
// Initialize a fresh chain with only a genesis block
genesis, _ := core.WriteTestNetGenesisBlock(db)
blockchain, _ := NewLightChain(&dummyOdr{db: db}, testChainConfig(), core.FakePow{}, evmux)
// Create and inject the requested chain
if n == 0 {
return db, blockchain, nil
}
// Header-only chain requested
headers := makeHeaderChain(genesis.Header(), n, db, canonicalSeed)
_, err := blockchain.InsertHeaderChain(headers, 1)
return db, blockchain, err
}
func init() {
runtime.GOMAXPROCS(runtime.NumCPU())
}
func thePow() pow.PoW {
pow, _ := ethash.NewForTesting()
return pow
}
func theLightChain(db ethdb.Database, t *testing.T) *LightChain {
var eventMux event.TypeMux
core.WriteTestNetGenesisBlock(db)
LightChain, err := NewLightChain(&dummyOdr{db: db}, testChainConfig(), thePow(), &eventMux)
if err != nil {
t.Error("failed creating LightChain:", err)
t.FailNow()
return nil
}
return LightChain
}
// Test fork of length N starting from block i
func testFork(t *testing.T, LightChain *LightChain, i, n int, comparator func(td1, td2 *big.Int)) {
// Copy old chain up to #i into a new db
db, LightChain2, err := newCanonical(i)
if err != nil {
t.Fatal("could not make new canonical in testFork", err)
}
// Assert the chains have the same header/block at #i
var hash1, hash2 common.Hash
hash1 = LightChain.GetHeaderByNumber(uint64(i)).Hash()
hash2 = LightChain2.GetHeaderByNumber(uint64(i)).Hash()
if hash1 != hash2 {
t.Errorf("chain content mismatch at %d: have hash %v, want hash %v", i, hash2, hash1)
}
// Extend the newly created chain
var (
headerChainB []*types.Header
)
headerChainB = makeHeaderChain(LightChain2.CurrentHeader(), n, db, forkSeed)
if _, err := LightChain2.InsertHeaderChain(headerChainB, 1); err != nil {
t.Fatalf("failed to insert forking chain: %v", err)
}
// Sanity check that the forked chain can be imported into the original
var tdPre, tdPost *big.Int
tdPre = LightChain.GetTdByHash(LightChain.CurrentHeader().Hash())
if err := testHeaderChainImport(headerChainB, LightChain); err != nil {
t.Fatalf("failed to import forked header chain: %v", err)
}
tdPost = LightChain.GetTdByHash(headerChainB[len(headerChainB)-1].Hash())
// Compare the total difficulties of the chains
comparator(tdPre, tdPost)
}
func printChain(bc *LightChain) {
for i := bc.CurrentHeader().GetNumberU64(); i > 0; i-- {
b := bc.GetHeaderByNumber(uint64(i))
fmt.Printf("\t%x %v\n", b.Hash(), b.Difficulty)
}
}
// testHeaderChainImport tries to process a chain of header, writing them into
// the database if successful.
func testHeaderChainImport(chain []*types.Header, LightChain *LightChain) error {
for _, header := range chain {
// Try and validate the header
if err := LightChain.Validator().ValidateHeader(header, LightChain.GetHeaderByHash(header.ParentHash), false); err != nil {
return err
}
// Manually insert the header into the database, but don't reorganize (allows subsequent testing)
LightChain.mu.Lock()
core.WriteTd(LightChain.chainDb, header.Hash(), header.Number.Uint64(), new(big.Int).Add(header.Difficulty, LightChain.GetTdByHash(header.ParentHash)))
core.WriteHeader(LightChain.chainDb, header)
LightChain.mu.Unlock()
}
return nil
}
// Tests that given a starting canonical chain of a given size, it can be extended
// with various length chains.
func TestExtendCanonicalHeaders(t *testing.T) {
length := 5
// Make first chain starting from genesis
_, processor, err := newCanonical(length)
if err != nil {
t.Fatalf("failed to make new canonical chain: %v", err)
}
// Define the difficulty comparator
better := func(td1, td2 *big.Int) {
if td2.Cmp(td1) <= 0 {
t.Errorf("total difficulty mismatch: have %v, expected more than %v", td2, td1)
}
}
// Start fork from current height
testFork(t, processor, length, 1, better)
testFork(t, processor, length, 2, better)
testFork(t, processor, length, 5, better)
testFork(t, processor, length, 10, better)
}
// Tests that given a starting canonical chain of a given size, creating shorter
// forks do not take canonical ownership.
func TestShorterForkHeaders(t *testing.T) {
length := 10
// Make first chain starting from genesis
_, processor, err := newCanonical(length)
if err != nil {
t.Fatalf("failed to make new canonical chain: %v", err)
}
// Define the difficulty comparator
worse := func(td1, td2 *big.Int) {
if td2.Cmp(td1) >= 0 {
t.Errorf("total difficulty mismatch: have %v, expected less than %v", td2, td1)
}
}
// Sum of numbers must be less than `length` for this to be a shorter fork
testFork(t, processor, 0, 3, worse)
testFork(t, processor, 0, 7, worse)
testFork(t, processor, 1, 1, worse)
testFork(t, processor, 1, 7, worse)
testFork(t, processor, 5, 3, worse)
testFork(t, processor, 5, 4, worse)
}
// Tests that given a starting canonical chain of a given size, creating longer
// forks do take canonical ownership.
func TestLongerForkHeaders(t *testing.T) {
length := 10
// Make first chain starting from genesis
_, processor, err := newCanonical(length)
if err != nil {
t.Fatalf("failed to make new canonical chain: %v", err)
}
// Define the difficulty comparator
better := func(td1, td2 *big.Int) {
if td2.Cmp(td1) <= 0 {
t.Errorf("total difficulty mismatch: have %v, expected more than %v", td2, td1)
}
}
// Sum of numbers must be greater than `length` for this to be a longer fork
testFork(t, processor, 0, 11, better)
testFork(t, processor, 0, 15, better)
testFork(t, processor, 1, 10, better)
testFork(t, processor, 1, 12, better)
testFork(t, processor, 5, 6, better)
testFork(t, processor, 5, 8, better)
}
// Tests that given a starting canonical chain of a given size, creating equal
// forks do take canonical ownership.
func TestEqualForkHeaders(t *testing.T) {
length := 10
// Make first chain starting from genesis
_, processor, err := newCanonical(length)
if err != nil {
t.Fatalf("failed to make new canonical chain: %v", err)
}
// Define the difficulty comparator
equal := func(td1, td2 *big.Int) {
if td2.Cmp(td1) != 0 {
t.Errorf("total difficulty mismatch: have %v, want %v", td2, td1)
}
}
// Sum of numbers must be equal to `length` for this to be an equal fork
testFork(t, processor, 0, 10, equal)
testFork(t, processor, 1, 9, equal)
testFork(t, processor, 2, 8, equal)
testFork(t, processor, 5, 5, equal)
testFork(t, processor, 6, 4, equal)
testFork(t, processor, 9, 1, equal)
}
// Tests that chains missing links do not get accepted by the processor.
func TestBrokenHeaderChain(t *testing.T) {
// Make chain starting from genesis
db, LightChain, err := newCanonical(10)
if err != nil {
t.Fatalf("failed to make new canonical chain: %v", err)
}
// Create a forked chain, and try to insert with a missing link
chain := makeHeaderChain(LightChain.CurrentHeader(), 5, db, forkSeed)[1:]
if err := testHeaderChainImport(chain, LightChain); err == nil {
t.Errorf("broken header chain not reported")
}
}
type bproc struct{}
func (bproc) ValidateHeader(*types.Header, *types.Header, bool) error { return nil }
func makeHeaderChainWithDiff(genesis *types.Block, d []int, seed byte) []*types.Header {
var chain []*types.Header
for i, difficulty := range d {
header := &types.Header{
Coinbase: common.Address{seed},
Number: big.NewInt(int64(i + 1)),
Difficulty: big.NewInt(int64(difficulty)),
UncleHash: types.EmptyUncleHash,
TxHash: types.EmptyRootHash,
ReceiptHash: types.EmptyRootHash,
}
if i == 0 {
header.ParentHash = genesis.Hash()
} else {
header.ParentHash = chain[i-1].Hash()
}
chain = append(chain, types.CopyHeader(header))
}
return chain
}
type dummyOdr struct {
OdrBackend
db ethdb.Database
}
func (odr *dummyOdr) Database() ethdb.Database {
return odr.db
}
func (odr *dummyOdr) Retrieve(ctx context.Context, req OdrRequest) error {
return nil
}
func chm(genesis *types.Block, db ethdb.Database) *LightChain {
odr := &dummyOdr{db: db}
var eventMux event.TypeMux
bc := &LightChain{odr: odr, chainDb: db, genesisBlock: genesis, eventMux: &eventMux, pow: core.FakePow{}}
bc.hc, _ = core.NewHeaderChain(db, testChainConfig(), bc.Validator, bc.getProcInterrupt)
bc.bodyCache, _ = lru.New(100)
bc.bodyRLPCache, _ = lru.New(100)
bc.blockCache, _ = lru.New(100)
bc.SetValidator(bproc{})
bc.ResetWithGenesisBlock(genesis)
return bc
}
// Tests that reorganizing a long difficult chain after a short easy one
// overwrites the canonical numbers and links in the database.
func TestReorgLongHeaders(t *testing.T) {
testReorg(t, []int{1, 2, 4}, []int{1, 2, 3, 4}, 10)
}
// Tests that reorganizing a short difficult chain after a long easy one
// overwrites the canonical numbers and links in the database.
func TestReorgShortHeaders(t *testing.T) {
testReorg(t, []int{1, 2, 3, 4}, []int{1, 10}, 11)
}
func testReorg(t *testing.T, first, second []int, td int64) {
// Create a pristine block chain
db, _ := ethdb.NewMemDatabase()
genesis, _ := core.WriteTestNetGenesisBlock(db)
bc := chm(genesis, db)
// Insert an easy and a difficult chain afterwards
bc.InsertHeaderChain(makeHeaderChainWithDiff(genesis, first, 11), 1)
bc.InsertHeaderChain(makeHeaderChainWithDiff(genesis, second, 22), 1)
// Check that the chain is valid number and link wise
prev := bc.CurrentHeader()
for header := bc.GetHeaderByNumber(bc.CurrentHeader().Number.Uint64() - 1); header.Number.Uint64() != 0; prev, header = header, bc.GetHeaderByNumber(header.Number.Uint64()-1) {
if prev.ParentHash != header.Hash() {
t.Errorf("parent header hash mismatch: have %x, want %x", prev.ParentHash, header.Hash())
}
}
// Make sure the chain total difficulty is the correct one
want := new(big.Int).Add(genesis.Difficulty(), big.NewInt(td))
if have := bc.GetTdByHash(bc.CurrentHeader().Hash()); have.Cmp(want) != 0 {
t.Errorf("total difficulty mismatch: have %v, want %v", have, want)
}
}
// Tests that the insertion functions detect banned hashes.
func TestBadHeaderHashes(t *testing.T) {
// Create a pristine block chain
db, _ := ethdb.NewMemDatabase()
genesis, _ := core.WriteTestNetGenesisBlock(db)
bc := chm(genesis, db)
// Create a chain, ban a hash and try to import
var err error
headers := makeHeaderChainWithDiff(genesis, []int{1, 2, 4}, 10)
core.BadHashes[headers[2].Hash()] = true
_, err = bc.InsertHeaderChain(headers, 1)
if !core.IsBadHashError(err) {
t.Errorf("error mismatch: want: BadHashError, have: %v", err)
}
}
// Tests that bad hashes are detected on boot, and the chan rolled back to a
// good state prior to the bad hash.
func TestReorgBadHeaderHashes(t *testing.T) {
// Create a pristine block chain
db, _ := ethdb.NewMemDatabase()
genesis, _ := core.WriteTestNetGenesisBlock(db)
bc := chm(genesis, db)
// Create a chain, import and ban aferwards
headers := makeHeaderChainWithDiff(genesis, []int{1, 2, 3, 4}, 10)
if _, err := bc.InsertHeaderChain(headers, 1); err != nil {
t.Fatalf("failed to import headers: %v", err)
}
if bc.CurrentHeader().Hash() != headers[3].Hash() {
t.Errorf("last header hash mismatch: have: %x, want %x", bc.CurrentHeader().Hash(), headers[3].Hash())
}
core.BadHashes[headers[3].Hash()] = true
defer func() { delete(core.BadHashes, headers[3].Hash()) }()
// Create a new chain manager and check it rolled back the state
ncm, err := NewLightChain(&dummyOdr{db: db}, testChainConfig(), core.FakePow{}, new(event.TypeMux))
if err != nil {
t.Fatalf("failed to create new chain manager: %v", err)
}
if ncm.CurrentHeader().Hash() != headers[2].Hash() {
t.Errorf("last header hash mismatch: have: %x, want %x", ncm.CurrentHeader().Hash(), headers[2].Hash())
}
}

124
light/odr.go
View File

@@ -19,14 +19,22 @@
package light
import (
"math/big"
"github.com/ethereum/go-ethereum/common"
"github.com/ethereum/go-ethereum/core"
"github.com/ethereum/go-ethereum/core/types"
"github.com/ethereum/go-ethereum/crypto"
"github.com/ethereum/go-ethereum/ethdb"
"github.com/ethereum/go-ethereum/rlp"
"golang.org/x/net/context"
)
// OdrBackend is an interface to a backend service that handles odr retrievals
// NoOdr is the default context passed to an ODR capable function when the ODR
// service is not required.
var NoOdr = context.Background()
// OdrBackend is an interface to a backend service that handles ODR retrievals
type OdrBackend interface {
Database() ethdb.Database
Retrieve(ctx context.Context, req OdrRequest) error
@@ -37,17 +45,44 @@ type OdrRequest interface {
StoreResult(db ethdb.Database)
}
// TrieID identifies a state or account storage trie
type TrieID struct {
BlockHash, Root common.Hash
AccKey []byte
}
// StateTrieID returns a TrieID for a state trie belonging to a certain block
// header.
func StateTrieID(header *types.Header) *TrieID {
return &TrieID{
BlockHash: header.Hash(),
AccKey: nil,
Root: header.Root,
}
}
// StorageTrieID returns a TrieID for a contract storage trie at a given account
// of a given state trie. It also requires the root hash of the trie for
// checking Merkle proofs.
func StorageTrieID(state *TrieID, addr common.Address, root common.Hash) *TrieID {
return &TrieID{
BlockHash: state.BlockHash,
AccKey: crypto.Keccak256(addr[:]),
Root: root,
}
}
// TrieRequest is the ODR request type for state/storage trie entries
type TrieRequest struct {
OdrRequest
root common.Hash
key []byte
proof []rlp.RawValue
Id *TrieID
Key []byte
Proof []rlp.RawValue
}
// StoreResult stores the retrieved data in local database
func (req *TrieRequest) StoreResult(db ethdb.Database) {
storeProof(db, req.proof)
storeProof(db, req.Proof)
}
// storeProof stores the new trie nodes obtained from a merkle proof in the database
@@ -61,38 +96,61 @@ func storeProof(db ethdb.Database, proof []rlp.RawValue) {
}
}
// NodeDataRequest is the ODR request type for node data (used for retrieving contract code)
type NodeDataRequest struct {
// CodeRequest is the ODR request type for retrieving contract code
type CodeRequest struct {
OdrRequest
hash common.Hash
data []byte
}
// GetData returns the retrieved node data after a successful request
func (req *NodeDataRequest) GetData() []byte {
return req.data
Id *TrieID
Hash common.Hash
Data []byte
}
// StoreResult stores the retrieved data in local database
func (req *NodeDataRequest) StoreResult(db ethdb.Database) {
db.Put(req.hash[:], req.GetData())
func (req *CodeRequest) StoreResult(db ethdb.Database) {
db.Put(req.Hash[:], req.Data)
}
var sha3_nil = crypto.Keccak256Hash(nil)
// retrieveNodeData tries to retrieve node data with the given hash from the network
func retrieveNodeData(ctx context.Context, odr OdrBackend, hash common.Hash) ([]byte, error) {
if hash == sha3_nil {
return nil, nil
}
res, _ := odr.Database().Get(hash[:])
if res != nil {
return res, nil
}
r := &NodeDataRequest{hash: hash}
if err := odr.Retrieve(ctx, r); err != nil {
return nil, err
} else {
return r.GetData(), nil
}
// BlockRequest is the ODR request type for retrieving block bodies
type BlockRequest struct {
OdrRequest
Hash common.Hash
Number uint64
Rlp []byte
}
// StoreResult stores the retrieved data in local database
func (req *BlockRequest) StoreResult(db ethdb.Database) {
core.WriteBodyRLP(db, req.Hash, req.Number, req.Rlp)
}
// ReceiptsRequest is the ODR request type for retrieving block bodies
type ReceiptsRequest struct {
OdrRequest
Hash common.Hash
Number uint64
Receipts types.Receipts
}
// StoreResult stores the retrieved data in local database
func (req *ReceiptsRequest) StoreResult(db ethdb.Database) {
core.WriteBlockReceipts(db, req.Hash, req.Number, req.Receipts)
}
// TrieRequest is the ODR request type for state/storage trie entries
type ChtRequest struct {
OdrRequest
ChtNum, BlockNum uint64
ChtRoot common.Hash
Header *types.Header
Td *big.Int
Proof []rlp.RawValue
}
// StoreResult stores the retrieved data in local database
func (req *ChtRequest) StoreResult(db ethdb.Database) {
// if there is a canonical hash, there is a header too
core.WriteHeader(db, req.Header)
hash, num := req.Header.Hash(), req.Header.Number.Uint64()
core.WriteTd(db, hash, num, req.Td)
core.WriteCanonicalHash(db, hash, num)
//storeProof(db, req.Proof)
}

323
light/odr_test.go Normal file
View File

@@ -0,0 +1,323 @@
package light
import (
"bytes"
"errors"
"math/big"
"testing"
"time"
"github.com/ethereum/go-ethereum/common"
"github.com/ethereum/go-ethereum/core"
"github.com/ethereum/go-ethereum/core/state"
"github.com/ethereum/go-ethereum/core/types"
"github.com/ethereum/go-ethereum/core/vm"
"github.com/ethereum/go-ethereum/crypto"
"github.com/ethereum/go-ethereum/ethdb"
"github.com/ethereum/go-ethereum/event"
"github.com/ethereum/go-ethereum/params"
"github.com/ethereum/go-ethereum/rlp"
"github.com/ethereum/go-ethereum/trie"
"golang.org/x/net/context"
)
var (
testBankKey, _ = crypto.HexToECDSA("b71c71a67e1177ad4e901695e1b4b9ee17ae16c6668d313eac2f96dbcda3f291")
testBankAddress = crypto.PubkeyToAddress(testBankKey.PublicKey)
testBankFunds = big.NewInt(100000000)
acc1Key, _ = crypto.HexToECDSA("8a1f9a8f95be41cd7ccb6168179afb4504aefe388d1e14474d32c45c72ce7b7a")
acc2Key, _ = crypto.HexToECDSA("49a7b37aa6f6645917e7b807e9d1c00d4fa71f18343b0d4122a4d2df64dd6fee")
acc1Addr = crypto.PubkeyToAddress(acc1Key.PublicKey)
acc2Addr = crypto.PubkeyToAddress(acc2Key.PublicKey)
testContractCode = common.Hex2Bytes("606060405260cc8060106000396000f360606040526000357c01000000000000000000000000000000000000000000000000000000009004806360cd2685146041578063c16431b914606b57603f565b005b6055600480803590602001909190505060a9565b6040518082815260200191505060405180910390f35b60886004808035906020019091908035906020019091905050608a565b005b80600060005083606481101560025790900160005b50819055505b5050565b6000600060005082606481101560025790900160005b5054905060c7565b91905056")
testContractAddr common.Address
)
type testOdr struct {
OdrBackend
sdb, ldb ethdb.Database
disable bool
}
func (odr *testOdr) Database() ethdb.Database {
return odr.ldb
}
var ErrOdrDisabled = errors.New("ODR disabled")
func (odr *testOdr) Retrieve(ctx context.Context, req OdrRequest) error {
if odr.disable {
return ErrOdrDisabled
}
switch req := req.(type) {
case *BlockRequest:
req.Rlp = core.GetBodyRLP(odr.sdb, req.Hash, core.GetBlockNumber(odr.sdb, req.Hash))
case *ReceiptsRequest:
req.Receipts = core.GetBlockReceipts(odr.sdb, req.Hash, core.GetBlockNumber(odr.sdb, req.Hash))
case *TrieRequest:
t, _ := trie.New(req.Id.Root, odr.sdb)
req.Proof = t.Prove(req.Key)
case *CodeRequest:
req.Data, _ = odr.sdb.Get(req.Hash[:])
}
req.StoreResult(odr.ldb)
return nil
}
type odrTestFn func(ctx context.Context, db ethdb.Database, bc *core.BlockChain, lc *LightChain, bhash common.Hash) []byte
func TestOdrGetBlockLes1(t *testing.T) { testChainOdr(t, 1, 1, odrGetBlock) }
func odrGetBlock(ctx context.Context, db ethdb.Database, bc *core.BlockChain, lc *LightChain, bhash common.Hash) []byte {
var block *types.Block
if bc != nil {
block = bc.GetBlockByHash(bhash)
} else {
block, _ = lc.GetBlockByHash(ctx, bhash)
}
if block == nil {
return nil
}
rlp, _ := rlp.EncodeToBytes(block)
return rlp
}
func TestOdrGetReceiptsLes1(t *testing.T) { testChainOdr(t, 1, 1, odrGetReceipts) }
func odrGetReceipts(ctx context.Context, db ethdb.Database, bc *core.BlockChain, lc *LightChain, bhash common.Hash) []byte {
var receipts types.Receipts
if bc != nil {
receipts = core.GetBlockReceipts(db, bhash, core.GetBlockNumber(db, bhash))
} else {
receipts, _ = GetBlockReceipts(ctx, lc.Odr(), bhash, core.GetBlockNumber(db, bhash))
}
if receipts == nil {
return nil
}
rlp, _ := rlp.EncodeToBytes(receipts)
return rlp
}
func TestOdrAccountsLes1(t *testing.T) { testChainOdr(t, 1, 1, odrAccounts) }
func odrAccounts(ctx context.Context, db ethdb.Database, bc *core.BlockChain, lc *LightChain, bhash common.Hash) []byte {
dummyAddr := common.HexToAddress("1234567812345678123456781234567812345678")
acc := []common.Address{testBankAddress, acc1Addr, acc2Addr, dummyAddr}
var res []byte
for _, addr := range acc {
if bc != nil {
header := bc.GetHeaderByHash(bhash)
st, err := state.New(header.Root, db)
if err == nil {
bal := st.GetBalance(addr)
rlp, _ := rlp.EncodeToBytes(bal)
res = append(res, rlp...)
}
} else {
header := lc.GetHeaderByHash(bhash)
st := NewLightState(StateTrieID(header), lc.Odr())
bal, err := st.GetBalance(ctx, addr)
if err == nil {
rlp, _ := rlp.EncodeToBytes(bal)
res = append(res, rlp...)
}
}
}
return res
}
func TestOdrContractCallLes1(t *testing.T) { testChainOdr(t, 1, 2, odrContractCall) }
// fullcallmsg is the message type used for call transations.
type fullcallmsg struct {
from *state.StateObject
to *common.Address
gas, gasPrice *big.Int
value *big.Int
data []byte
}
// accessor boilerplate to implement core.Message
func (m fullcallmsg) From() (common.Address, error) { return m.from.Address(), nil }
func (m fullcallmsg) FromFrontier() (common.Address, error) { return m.from.Address(), nil }
func (m fullcallmsg) Nonce() uint64 { return 0 }
func (m fullcallmsg) CheckNonce() bool { return false }
func (m fullcallmsg) To() *common.Address { return m.to }
func (m fullcallmsg) GasPrice() *big.Int { return m.gasPrice }
func (m fullcallmsg) Gas() *big.Int { return m.gas }
func (m fullcallmsg) Value() *big.Int { return m.value }
func (m fullcallmsg) Data() []byte { return m.data }
// callmsg is the message type used for call transations.
type lightcallmsg struct {
from *StateObject
to *common.Address
gas, gasPrice *big.Int
value *big.Int
data []byte
}
// accessor boilerplate to implement core.Message
func (m lightcallmsg) From() (common.Address, error) { return m.from.Address(), nil }
func (m lightcallmsg) FromFrontier() (common.Address, error) { return m.from.Address(), nil }
func (m lightcallmsg) Nonce() uint64 { return 0 }
func (m lightcallmsg) CheckNonce() bool { return false }
func (m lightcallmsg) To() *common.Address { return m.to }
func (m lightcallmsg) GasPrice() *big.Int { return m.gasPrice }
func (m lightcallmsg) Gas() *big.Int { return m.gas }
func (m lightcallmsg) Value() *big.Int { return m.value }
func (m lightcallmsg) Data() []byte { return m.data }
func odrContractCall(ctx context.Context, db ethdb.Database, bc *core.BlockChain, lc *LightChain, bhash common.Hash) []byte {
data := common.Hex2Bytes("60CD26850000000000000000000000000000000000000000000000000000000000000000")
var res []byte
for i := 0; i < 3; i++ {
data[35] = byte(i)
if bc != nil {
header := bc.GetHeaderByHash(bhash)
statedb, err := state.New(header.Root, db)
if err == nil {
from := statedb.GetOrNewStateObject(testBankAddress)
from.SetBalance(common.MaxBig)
msg := fullcallmsg{
from: from,
gas: big.NewInt(100000),
gasPrice: big.NewInt(0),
value: big.NewInt(0),
data: data,
to: &testContractAddr,
}
vmenv := core.NewEnv(statedb, testChainConfig(), bc, msg, header, vm.Config{})
gp := new(core.GasPool).AddGas(common.MaxBig)
ret, _, _ := core.ApplyMessage(vmenv, msg, gp)
res = append(res, ret...)
}
} else {
header := lc.GetHeaderByHash(bhash)
state := NewLightState(StateTrieID(header), lc.Odr())
from, err := state.GetOrNewStateObject(ctx, testBankAddress)
if err == nil {
from.SetBalance(common.MaxBig)
msg := lightcallmsg{
from: from,
gas: big.NewInt(100000),
gasPrice: big.NewInt(0),
value: big.NewInt(0),
data: data,
to: &testContractAddr,
}
vmenv := NewEnv(ctx, state, testChainConfig(), lc, msg, header, vm.Config{})
gp := new(core.GasPool).AddGas(common.MaxBig)
ret, _, _ := core.ApplyMessage(vmenv, msg, gp)
if vmenv.Error() == nil {
res = append(res, ret...)
}
}
}
}
return res
}
func testChainGen(i int, block *core.BlockGen) {
switch i {
case 0:
// In block 1, the test bank sends account #1 some ether.
tx, _ := types.NewTransaction(block.TxNonce(testBankAddress), acc1Addr, big.NewInt(10000), params.TxGas, nil, nil).SignECDSA(testBankKey)
block.AddTx(tx)
case 1:
// In block 2, the test bank sends some more ether to account #1.
// acc1Addr passes it on to account #2.
// acc1Addr creates a test contract.
tx1, _ := types.NewTransaction(block.TxNonce(testBankAddress), acc1Addr, big.NewInt(1000), params.TxGas, nil, nil).SignECDSA(testBankKey)
nonce := block.TxNonce(acc1Addr)
tx2, _ := types.NewTransaction(nonce, acc2Addr, big.NewInt(1000), params.TxGas, nil, nil).SignECDSA(acc1Key)
nonce++
tx3, _ := types.NewContractCreation(nonce, big.NewInt(0), big.NewInt(1000000), big.NewInt(0), testContractCode).SignECDSA(acc1Key)
testContractAddr = crypto.CreateAddress(acc1Addr, nonce)
block.AddTx(tx1)
block.AddTx(tx2)
block.AddTx(tx3)
case 2:
// Block 3 is empty but was mined by account #2.
block.SetCoinbase(acc2Addr)
block.SetExtra([]byte("yeehaw"))
data := common.Hex2Bytes("C16431B900000000000000000000000000000000000000000000000000000000000000010000000000000000000000000000000000000000000000000000000000000001")
tx, _ := types.NewTransaction(block.TxNonce(testBankAddress), testContractAddr, big.NewInt(0), big.NewInt(100000), nil, data).SignECDSA(testBankKey)
block.AddTx(tx)
case 3:
// Block 4 includes blocks 2 and 3 as uncle headers (with modified extra data).
b2 := block.PrevBlock(1).Header()
b2.Extra = []byte("foo")
block.AddUncle(b2)
b3 := block.PrevBlock(2).Header()
b3.Extra = []byte("foo")
block.AddUncle(b3)
data := common.Hex2Bytes("C16431B900000000000000000000000000000000000000000000000000000000000000020000000000000000000000000000000000000000000000000000000000000002")
tx, _ := types.NewTransaction(block.TxNonce(testBankAddress), testContractAddr, big.NewInt(0), big.NewInt(100000), nil, data).SignECDSA(testBankKey)
block.AddTx(tx)
}
}
func testChainOdr(t *testing.T, protocol int, expFail uint64, fn odrTestFn) {
var (
evmux = new(event.TypeMux)
pow = new(core.FakePow)
sdb, _ = ethdb.NewMemDatabase()
ldb, _ = ethdb.NewMemDatabase()
genesis = core.WriteGenesisBlockForTesting(sdb, core.GenesisAccount{Address: testBankAddress, Balance: testBankFunds})
)
core.WriteGenesisBlockForTesting(ldb, core.GenesisAccount{Address: testBankAddress, Balance: testBankFunds})
// Assemble the test environment
blockchain, _ := core.NewBlockChain(sdb, testChainConfig(), pow, evmux)
gchain, _ := core.GenerateChain(nil, genesis, sdb, 4, testChainGen)
if _, err := blockchain.InsertChain(gchain); err != nil {
panic(err)
}
odr := &testOdr{sdb: sdb, ldb: ldb}
lightchain, _ := NewLightChain(odr, testChainConfig(), pow, evmux)
lightchain.SetValidator(bproc{})
headers := make([]*types.Header, len(gchain))
for i, block := range gchain {
headers[i] = block.Header()
}
if _, err := lightchain.InsertHeaderChain(headers, 1); err != nil {
panic(err)
}
test := func(expFail uint64) {
for i := uint64(0); i <= blockchain.CurrentHeader().GetNumberU64(); i++ {
bhash := core.GetCanonicalHash(sdb, i)
b1 := fn(NoOdr, sdb, blockchain, nil, bhash)
ctx, _ := context.WithTimeout(context.Background(), 200*time.Millisecond)
b2 := fn(ctx, ldb, nil, lightchain, bhash)
eq := bytes.Equal(b1, b2)
exp := i < expFail
if exp && !eq {
t.Errorf("odr mismatch")
}
if !exp && eq {
t.Errorf("unexpected odr match")
}
}
}
odr.disable = true
// expect retrievals to fail (except genesis block) without a les peer
test(expFail)
odr.disable = false
// expect all retrievals to pass
test(5)
odr.disable = true
// still expect all retrievals to pass, now data should be cached locally
test(5)
}

185
light/odr_util.go Normal file
View File

@@ -0,0 +1,185 @@
// Copyright 2015 The go-ethereum Authors
// This file is part of the go-ethereum library.
//
// The go-ethereum library is free software: you can redistribute it and/or modify
// it under the terms of the GNU Lesser General Public License as published by
// the Free Software Foundation, either version 3 of the License, or
// (at your option) any later version.
//
// The go-ethereum library is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
// GNU Lesser General Public License for more details.
//
// You should have received a copy of the GNU Lesser General Public License
// along with the go-ethereum library. If not, see <http://www.gnu.org/licenses/>.
package light
import (
"bytes"
"errors"
"math/big"
"github.com/ethereum/go-ethereum/common"
"github.com/ethereum/go-ethereum/core"
"github.com/ethereum/go-ethereum/core/types"
"github.com/ethereum/go-ethereum/crypto"
"github.com/ethereum/go-ethereum/ethdb"
"github.com/ethereum/go-ethereum/logger"
"github.com/ethereum/go-ethereum/logger/glog"
"github.com/ethereum/go-ethereum/rlp"
"golang.org/x/net/context"
)
var sha3_nil = crypto.Keccak256Hash(nil)
var (
ErrNoTrustedCht = errors.New("No trusted canonical hash trie")
ErrNoHeader = errors.New("Header not found")
ChtFrequency = uint64(4096)
trustedChtKey = []byte("TrustedCHT")
)
type ChtNode struct {
Hash common.Hash
Td *big.Int
}
type TrustedCht struct {
Number uint64
Root common.Hash
}
func GetTrustedCht(db ethdb.Database) TrustedCht {
data, _ := db.Get(trustedChtKey)
var res TrustedCht
if err := rlp.DecodeBytes(data, &res); err != nil {
return TrustedCht{0, common.Hash{}}
}
return res
}
func WriteTrustedCht(db ethdb.Database, cht TrustedCht) {
data, _ := rlp.EncodeToBytes(cht)
db.Put(trustedChtKey, data)
}
func DeleteTrustedCht(db ethdb.Database) {
db.Delete(trustedChtKey)
}
func GetHeaderByNumber(ctx context.Context, odr OdrBackend, number uint64) (*types.Header, error) {
db := odr.Database()
hash := core.GetCanonicalHash(db, number)
if (hash != common.Hash{}) {
// if there is a canonical hash, there is a header too
header := core.GetHeader(db, hash, number)
if header == nil {
panic("Canonical hash present but header not found")
}
return header, nil
}
cht := GetTrustedCht(db)
if number >= cht.Number*ChtFrequency {
return nil, ErrNoTrustedCht
}
r := &ChtRequest{ChtRoot: cht.Root, ChtNum: cht.Number, BlockNum: number}
if err := odr.Retrieve(ctx, r); err != nil {
return nil, err
} else {
return r.Header, nil
}
}
func GetCanonicalHash(ctx context.Context, odr OdrBackend, number uint64) (common.Hash, error) {
hash := core.GetCanonicalHash(odr.Database(), number)
if (hash != common.Hash{}) {
return hash, nil
}
header, err := GetHeaderByNumber(ctx, odr, number)
if header != nil {
return header.Hash(), nil
}
return common.Hash{}, err
}
// retrieveContractCode tries to retrieve the contract code of the given account
// with the given hash from the network (id points to the storage trie belonging
// to the same account)
func retrieveContractCode(ctx context.Context, odr OdrBackend, id *TrieID, hash common.Hash) ([]byte, error) {
if hash == sha3_nil {
return nil, nil
}
res, _ := odr.Database().Get(hash[:])
if res != nil {
return res, nil
}
r := &CodeRequest{Id: id, Hash: hash}
if err := odr.Retrieve(ctx, r); err != nil {
return nil, err
} else {
return r.Data, nil
}
}
// GetBodyRLP retrieves the block body (transactions and uncles) in RLP encoding.
func GetBodyRLP(ctx context.Context, odr OdrBackend, hash common.Hash, number uint64) (rlp.RawValue, error) {
if data := core.GetBodyRLP(odr.Database(), hash, number); data != nil {
return data, nil
}
r := &BlockRequest{Hash: hash, Number: number}
if err := odr.Retrieve(ctx, r); err != nil {
return nil, err
} else {
return r.Rlp, nil
}
}
// GetBody retrieves the block body (transactons, uncles) corresponding to the
// hash.
func GetBody(ctx context.Context, odr OdrBackend, hash common.Hash, number uint64) (*types.Body, error) {
data, err := GetBodyRLP(ctx, odr, hash, number)
if err != nil {
return nil, err
}
body := new(types.Body)
if err := rlp.Decode(bytes.NewReader(data), body); err != nil {
glog.V(logger.Error).Infof("invalid block body RLP for hash %x: %v", hash, err)
return nil, err
}
return body, nil
}
// GetBlock retrieves an entire block corresponding to the hash, assembling it
// back from the stored header and body.
func GetBlock(ctx context.Context, odr OdrBackend, hash common.Hash, number uint64) (*types.Block, error) {
// Retrieve the block header and body contents
header := core.GetHeader(odr.Database(), hash, number)
if header == nil {
return nil, ErrNoHeader
}
body, err := GetBody(ctx, odr, hash, number)
if err != nil {
return nil, err
}
// Reassemble the block and return
return types.NewBlockWithHeader(header).WithBody(body.Transactions, body.Uncles), nil
}
// GetBlockReceipts retrieves the receipts generated by the transactions included
// in a block given by its hash.
func GetBlockReceipts(ctx context.Context, odr OdrBackend, hash common.Hash, number uint64) (types.Receipts, error) {
receipts := core.GetBlockReceipts(odr.Database(), hash, number)
if receipts != nil {
return receipts, nil
}
r := &ReceiptsRequest{Hash: hash, Number: number}
if err := odr.Retrieve(ctx, r); err != nil {
return nil, err
} else {
return r.Receipts, nil
}
}

42
light/state.go
View File

@@ -20,6 +20,7 @@ import (
"math/big"
"github.com/ethereum/go-ethereum/common"
"github.com/ethereum/go-ethereum/crypto"
"github.com/ethereum/go-ethereum/logger"
"github.com/ethereum/go-ethereum/logger/glog"
"golang.org/x/net/context"
@@ -33,10 +34,11 @@ var StartingNonce uint64
// state, retrieving unknown parts on-demand from the ODR backend. Changes are
// never stored in the local database, only in the memory objects.
type LightState struct {
odr OdrBackend
trie *LightTrie
odr OdrBackend
trie *LightTrie
id *TrieID
stateObjects map[string]*StateObject
refund *big.Int
}
// NewLightState creates a new LightState with the specified root.
@@ -44,15 +46,25 @@ type LightState struct {
// root is non-existent. In that case, ODR retrieval will always be unsuccessful
// and every operation will return with an error or wait for the context to be
// cancelled.
func NewLightState(root common.Hash, odr OdrBackend) *LightState {
tr := NewLightTrie(root, odr, true)
func NewLightState(id *TrieID, odr OdrBackend) *LightState {
var tr *LightTrie
if id != nil {
tr = NewLightTrie(id, odr, true)
}
return &LightState{
odr: odr,
trie: tr,
id: id,
stateObjects: make(map[string]*StateObject),
refund: new(big.Int),
}
}
// AddRefund adds an amount to the refund value collected during a vm execution
func (self *LightState) AddRefund(gas *big.Int) {
self.refund.Add(self.refund, gas)
}
// HasAccount returns true if an account exists at the given address
func (self *LightState) HasAccount(ctx context.Context, addr common.Address) (bool, error) {
so, err := self.GetStateObject(ctx, addr)
@@ -109,9 +121,9 @@ func (self *LightState) GetState(ctx context.Context, a common.Address, b common
return common.Hash{}, err
}
// IsDeleted returns true if the given account has been marked for deletion
// HasSuicided returns true if the given account has been marked for deletion
// or false if the account does not exist
func (self *LightState) IsDeleted(ctx context.Context, addr common.Address) (bool, error) {
func (self *LightState) HasSuicided(ctx context.Context, addr common.Address) (bool, error) {
stateObject, err := self.GetStateObject(ctx, addr)
if err == nil && stateObject != nil {
return stateObject.remove, nil
@@ -145,7 +157,7 @@ func (self *LightState) SetNonce(ctx context.Context, addr common.Address, nonce
func (self *LightState) SetCode(ctx context.Context, addr common.Address, code []byte) error {
stateObject, err := self.GetOrNewStateObject(ctx, addr)
if err == nil && stateObject != nil {
stateObject.SetCode(code)
stateObject.SetCode(crypto.Keccak256Hash(code), code)
}
return err
}
@@ -160,7 +172,7 @@ func (self *LightState) SetState(ctx context.Context, addr common.Address, key c
}
// Delete marks an account to be removed and clears its balance
func (self *LightState) Delete(ctx context.Context, addr common.Address) (bool, error) {
func (self *LightState) Suicide(ctx context.Context, addr common.Address) (bool, error) {
stateObject, err := self.GetOrNewStateObject(ctx, addr)
if err == nil && stateObject != nil {
stateObject.MarkForDeletion()
@@ -194,7 +206,7 @@ func (self *LightState) GetStateObject(ctx context.Context, addr common.Address)
return nil, nil
}
stateObject, err = DecodeObject(ctx, addr, self.odr, []byte(data))
stateObject, err = DecodeObject(ctx, self.id, addr, self.odr, []byte(data))
if err != nil {
return nil, err
}
@@ -258,14 +270,16 @@ func (self *LightState) CreateStateObject(ctx context.Context, addr common.Addre
// Copy creates a copy of the state
func (self *LightState) Copy() *LightState {
// ignore error - we assume state-to-be-copied always exists
state := NewLightState(common.Hash{}, self.odr)
state := NewLightState(nil, self.odr)
state.trie = self.trie
state.id = self.id
for k, stateObject := range self.stateObjects {
if stateObject.dirty {
state.stateObjects[k] = stateObject.Copy()
}
}
state.refund.Set(self.refund)
return state
}
@@ -274,4 +288,10 @@ func (self *LightState) Copy() *LightState {
func (self *LightState) Set(state *LightState) {
self.trie = state.trie
self.stateObjects = state.stateObjects
self.refund = state.refund
}
// GetRefund returns the refund value collected during a vm execution
func (self *LightState) GetRefund() *big.Int {
return self.refund
}

42
light/state_object.go
View File

@@ -40,7 +40,7 @@ func (self Code) String() string {
}
// Storage is a memory map cache of a contract storage
type Storage map[string]common.Hash
type Storage map[common.Hash]common.Hash
// String returns a string representation of the storage cache
func (self Storage) String() (str string) {
@@ -100,7 +100,7 @@ func NewStateObject(address common.Address, odr OdrBackend) *StateObject {
codeHash: emptyCodeHash,
storage: make(Storage),
}
object.trie = NewLightTrie(common.Hash{}, odr, true)
object.trie = NewLightTrie(&TrieID{}, odr, true)
return object
}
@@ -133,8 +133,7 @@ func (self *StateObject) Storage() Storage {
// GetState returns the storage value at the given address from either the cache
// or the trie
func (self *StateObject) GetState(ctx context.Context, key common.Hash) (common.Hash, error) {
strkey := key.Str()
value, exists := self.storage[strkey]
value, exists := self.storage[key]
if !exists {
var err error
value, err = self.getAddr(ctx, key)
@@ -142,7 +141,7 @@ func (self *StateObject) GetState(ctx context.Context, key common.Hash) (common.
return common.Hash{}, err
}
if (value != common.Hash{}) {
self.storage[strkey] = value
self.storage[key] = value
}
}
@@ -151,7 +150,7 @@ func (self *StateObject) GetState(ctx context.Context, key common.Hash) (common.
// SetState sets the storage value at the given address
func (self *StateObject) SetState(k, value common.Hash) {
self.storage[k.Str()] = value
self.storage[k] = value
self.dirty = true
}
@@ -179,6 +178,9 @@ func (c *StateObject) SetBalance(amount *big.Int) {
c.dirty = true
}
// ReturnGas returns the gas back to the origin. Used by the Virtual machine or Closures
func (c *StateObject) ReturnGas(gas, price *big.Int) {}
// Copy creates a copy of the state object
func (self *StateObject) Copy() *StateObject {
stateObject := NewStateObject(self.Address(), self.odr)
@@ -215,9 +217,9 @@ func (self *StateObject) Code() []byte {
}
// SetCode sets the contract code
func (self *StateObject) SetCode(code []byte) {
func (self *StateObject) SetCode(hash common.Hash, code []byte) {
self.code = code
self.codeHash = crypto.Keccak256(code)
self.codeHash = hash[:]
self.dirty = true
}
@@ -232,6 +234,23 @@ func (self *StateObject) Nonce() uint64 {
return self.nonce
}
// ForEachStorage calls a callback function for every key/value pair found
// in the local storage cache. Note that unlike core/state.StateObject,
// light.StateObject only returns cached values and doesn't download the
// entire storage tree.
func (self *StateObject) ForEachStorage(cb func(key, value common.Hash) bool) {
for h, v := range self.storage {
cb(h, v)
}
}
// Never called, but must be present to allow StateObject to be used
// as a vm.Account interface that also satisfies the vm.ContractRef
// interface. Interfaces are awesome.
func (self *StateObject) Value() *big.Int {
panic("Value on StateObject should never be called")
}
// Encoding
type extStateObject struct {
@@ -242,7 +261,7 @@ type extStateObject struct {
}
// DecodeObject decodes an RLP-encoded state object.
func DecodeObject(ctx context.Context, address common.Address, odr OdrBackend, data []byte) (*StateObject, error) {
func DecodeObject(ctx context.Context, stateID *TrieID, address common.Address, odr OdrBackend, data []byte) (*StateObject, error) {
var (
obj = &StateObject{address: address, odr: odr, storage: make(Storage)}
ext extStateObject
@@ -251,9 +270,10 @@ func DecodeObject(ctx context.Context, address common.Address, odr OdrBackend, d
if err = rlp.DecodeBytes(data, &ext); err != nil {
return nil, err
}
obj.trie = NewLightTrie(ext.Root, odr, true)
trieID := StorageTrieID(stateID, address, ext.Root)
obj.trie = NewLightTrie(trieID, odr, true)
if !bytes.Equal(ext.CodeHash, emptyCodeHash) {
if obj.code, err = retrieveNodeData(ctx, obj.odr, common.BytesToHash(ext.CodeHash)); err != nil {
if obj.code, err = retrieveContractCode(ctx, obj.odr, trieID, common.BytesToHash(ext.CodeHash)); err != nil {
return nil, fmt.Errorf("can't find code for hash %x: %v", ext.CodeHash, err)
}
}

50
light/state_test.go
View File

@@ -22,33 +22,13 @@ import (
"testing"
"github.com/ethereum/go-ethereum/common"
"github.com/ethereum/go-ethereum/core"
"github.com/ethereum/go-ethereum/core/state"
"github.com/ethereum/go-ethereum/core/types"
"github.com/ethereum/go-ethereum/ethdb"
"github.com/ethereum/go-ethereum/trie"
"golang.org/x/net/context"
)
type testOdr struct {
OdrBackend
sdb, ldb ethdb.Database
}
func (odr *testOdr) Database() ethdb.Database {
return odr.ldb
}
func (odr *testOdr) Retrieve(ctx context.Context, req OdrRequest) error {
switch req := req.(type) {
case *TrieRequest:
t, _ := trie.New(req.root, odr.sdb)
req.proof = t.Prove(req.key)
case *NodeDataRequest:
req.data, _ = odr.sdb.Get(req.hash[:])
}
req.StoreResult(odr.ldb)
return nil
}
func makeTestState() (common.Hash, ethdb.Database) {
sdb, _ := ethdb.NewMemDatabase()
st, _ := state.New(common.Hash{}, sdb)
@@ -67,9 +47,11 @@ func makeTestState() (common.Hash, ethdb.Database) {
func TestLightStateOdr(t *testing.T) {
root, sdb := makeTestState()
header := &types.Header{Root: root, Number: big.NewInt(0)}
core.WriteHeader(sdb, header)
ldb, _ := ethdb.NewMemDatabase()
odr := &testOdr{sdb: sdb, ldb: ldb}
ls := NewLightState(root, odr)
ls := NewLightState(StateTrieID(header), odr)
ctx := context.Background()
for i := byte(0); i < 100; i++ {
@@ -151,9 +133,11 @@ func TestLightStateOdr(t *testing.T) {
func TestLightStateSetCopy(t *testing.T) {
root, sdb := makeTestState()
header := &types.Header{Root: root, Number: big.NewInt(0)}
core.WriteHeader(sdb, header)
ldb, _ := ethdb.NewMemDatabase()
odr := &testOdr{sdb: sdb, ldb: ldb}
ls := NewLightState(root, odr)
ls := NewLightState(StateTrieID(header), odr)
ctx := context.Background()
for i := byte(0); i < 100; i++ {
@@ -227,9 +211,11 @@ func TestLightStateSetCopy(t *testing.T) {
func TestLightStateDelete(t *testing.T) {
root, sdb := makeTestState()
header := &types.Header{Root: root, Number: big.NewInt(0)}
core.WriteHeader(sdb, header)
ldb, _ := ethdb.NewMemDatabase()
odr := &testOdr{sdb: sdb, ldb: ldb}
ls := NewLightState(root, odr)
ls := NewLightState(StateTrieID(header), odr)
ctx := context.Background()
addr := common.Address{42}
@@ -242,21 +228,21 @@ func TestLightStateDelete(t *testing.T) {
t.Fatalf("HasAccount returned false, expected true")
}
b, err = ls.IsDeleted(ctx, addr)
b, err = ls.HasSuicided(ctx, addr)
if err != nil {
t.Fatalf("IsDeleted error: %v", err)
t.Fatalf("HasSuicided error: %v", err)
}
if b {
t.Fatalf("IsDeleted returned true, expected false")
t.Fatalf("HasSuicided returned true, expected false")
}
ls.Delete(ctx, addr)
ls.Suicide(ctx, addr)
b, err = ls.IsDeleted(ctx, addr)
b, err = ls.HasSuicided(ctx, addr)
if err != nil {
t.Fatalf("IsDeleted error: %v", err)
t.Fatalf("HasSuicided error: %v", err)
}
if !b {
t.Fatalf("IsDeleted returned false, expected true")
t.Fatalf("HasSuicided returned false, expected true")
}
}

25
light/trie.go
View File

@@ -17,7 +17,6 @@
package light
import (
"github.com/ethereum/go-ethereum/common"
"github.com/ethereum/go-ethereum/ethdb"
"github.com/ethereum/go-ethereum/trie"
"golang.org/x/net/context"
@@ -25,28 +24,28 @@ import (
// LightTrie is an ODR-capable wrapper around trie.SecureTrie
type LightTrie struct {
trie *trie.SecureTrie
originalRoot common.Hash
odr OdrBackend
db ethdb.Database
trie *trie.SecureTrie
id *TrieID
odr OdrBackend
db ethdb.Database
}
// NewLightTrie creates a new LightTrie instance. It doesn't instantly try to
// access the db or network and retrieve the root node, it only initializes its
// encapsulated SecureTrie at the first actual operation.
func NewLightTrie(root common.Hash, odr OdrBackend, useFakeMap bool) *LightTrie {
func NewLightTrie(id *TrieID, odr OdrBackend, useFakeMap bool) *LightTrie {
return &LightTrie{
// SecureTrie is initialized before first request
originalRoot: root,
odr: odr,
db: odr.Database(),
id: id,
odr: odr,
db: odr.Database(),
}
}
// retrieveKey retrieves a single key, returns true and stores nodes in local
// database if successful
func (t *LightTrie) retrieveKey(ctx context.Context, key []byte) bool {
r := &TrieRequest{root: t.originalRoot, key: key}
r := &TrieRequest{Id: t.id, Key: key}
return t.odr.Retrieve(ctx, r) == nil
}
@@ -79,7 +78,7 @@ func (t *LightTrie) do(ctx context.Context, fallbackKey []byte, fn func() error)
func (t *LightTrie) Get(ctx context.Context, key []byte) (res []byte, err error) {
err = t.do(ctx, key, func() (err error) {
if t.trie == nil {
t.trie, err = trie.NewSecure(t.originalRoot, t.db, 0)
t.trie, err = trie.NewSecure(t.id.Root, t.db, 0)
}
if err == nil {
res, err = t.trie.TryGet(key)
@@ -98,7 +97,7 @@ func (t *LightTrie) Get(ctx context.Context, key []byte) (res []byte, err error)
func (t *LightTrie) Update(ctx context.Context, key, value []byte) (err error) {
err = t.do(ctx, key, func() (err error) {
if t.trie == nil {
t.trie, err = trie.NewSecure(t.originalRoot, t.db, 0)
t.trie, err = trie.NewSecure(t.id.Root, t.db, 0)
}
if err == nil {
err = t.trie.TryUpdate(key, value)
@@ -112,7 +111,7 @@ func (t *LightTrie) Update(ctx context.Context, key, value []byte) (err error) {
func (t *LightTrie) Delete(ctx context.Context, key []byte) (err error) {
err = t.do(ctx, key, func() (err error) {
if t.trie == nil {
t.trie, err = trie.NewSecure(t.originalRoot, t.db, 0)
t.trie, err = trie.NewSecure(t.id.Root, t.db, 0)
}
if err == nil {
err = t.trie.TryDelete(key)

551
light/txpool.go Normal file
View File

@@ -0,0 +1,551 @@
// Copyright 2015 The go-ethereum Authors
// This file is part of the go-ethereum library.
//
// The go-ethereum library is free software: you can redistribute it and/or modify
// it under the terms of the GNU Lesser General Public License as published by
// the Free Software Foundation, either version 3 of the License, or
// (at your option) any later version.
//
// The go-ethereum library is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
// GNU Lesser General Public License for more details.
//
// You should have received a copy of the GNU Lesser General Public License
// along with the go-ethereum library. If not, see <http://www.gnu.org/licenses/>.
package light
import (
"fmt"
"sync"
"time"
"github.com/ethereum/go-ethereum/common"
"github.com/ethereum/go-ethereum/core"
"github.com/ethereum/go-ethereum/core/types"
"github.com/ethereum/go-ethereum/ethdb"
"github.com/ethereum/go-ethereum/event"
"github.com/ethereum/go-ethereum/logger"
"github.com/ethereum/go-ethereum/logger/glog"
"github.com/ethereum/go-ethereum/rlp"
"golang.org/x/net/context"
)
// txPermanent is the number of mined blocks after a mined transaction is
// considered permanent and no rollback is expected
var txPermanent = uint64(500)
// TxPool implements the transaction pool for light clients, which keeps track
// of the status of locally created transactions, detecting if they are included
// in a block (mined) or rolled back. There are no queued transactions since we
// always receive all locally signed transactions in the same order as they are
// created.
type TxPool struct {
config *core.ChainConfig
quit chan bool
eventMux *event.TypeMux
events event.Subscription
mu sync.RWMutex
chain *LightChain
odr OdrBackend
chainDb ethdb.Database
relay TxRelayBackend
head common.Hash
nonce map[common.Address]uint64 // "pending" nonce
pending map[common.Hash]*types.Transaction // pending transactions by tx hash
mined map[common.Hash][]*types.Transaction // mined transactions by block hash
clearIdx uint64 // earliest block nr that can contain mined tx info
homestead bool
}
// TxRelayBackend provides an interface to the mechanism that forwards transacions
// to the ETH network. The implementations of the functions should be non-blocking.
//
// Send instructs backend to forward new transactions
// NewHead notifies backend about a new head after processed by the tx pool,
// including mined and rolled back transactions since the last event
// Discard notifies backend about transactions that should be discarded either
// because they have been replaced by a re-send or because they have been mined
// long ago and no rollback is expected
type TxRelayBackend interface {
Send(txs types.Transactions)
NewHead(head common.Hash, mined []common.Hash, rollback []common.Hash)
Discard(hashes []common.Hash)
}
// NewTxPool creates a new light transaction pool
func NewTxPool(config *core.ChainConfig, eventMux *event.TypeMux, chain *LightChain, relay TxRelayBackend) *TxPool {
pool := &TxPool{
config: config,
nonce: make(map[common.Address]uint64),
pending: make(map[common.Hash]*types.Transaction),
mined: make(map[common.Hash][]*types.Transaction),
quit: make(chan bool),
eventMux: eventMux,
events: eventMux.Subscribe(core.ChainHeadEvent{}),
chain: chain,
relay: relay,
odr: chain.Odr(),
chainDb: chain.Odr().Database(),
head: chain.CurrentHeader().Hash(),
clearIdx: chain.CurrentHeader().GetNumberU64(),
}
go pool.eventLoop()
return pool
}
// currentState returns the light state of the current head header
func (pool *TxPool) currentState() *LightState {
return NewLightState(StateTrieID(pool.chain.CurrentHeader()), pool.odr)
}
// GetNonce returns the "pending" nonce of a given address. It always queries
// the nonce belonging to the latest header too in order to detect if another
// client using the same key sent a transaction.
func (pool *TxPool) GetNonce(ctx context.Context, addr common.Address) (uint64, error) {
nonce, err := pool.currentState().GetNonce(ctx, addr)
if err != nil {
return 0, err
}
sn, ok := pool.nonce[addr]
if ok && sn > nonce {
nonce = sn
}
if !ok || sn < nonce {
pool.nonce[addr] = nonce
}
return nonce, nil
}
type txBlockData struct {
BlockHash common.Hash
BlockIndex uint64
Index uint64
}
// storeTxBlockData stores the block position of a mined tx in the local db
func (pool *TxPool) storeTxBlockData(txh common.Hash, tbd txBlockData) {
//fmt.Println("storeTxBlockData", txh, tbd)
data, _ := rlp.EncodeToBytes(tbd)
pool.chainDb.Put(append(txh[:], byte(1)), data)
}
// removeTxBlockData removes the stored block position of a rolled back tx
func (pool *TxPool) removeTxBlockData(txh common.Hash) {
//fmt.Println("removeTxBlockData", txh)
pool.chainDb.Delete(append(txh[:], byte(1)))
}
// txStateChanges stores the recent changes between pending/mined states of
// transactions. True means mined, false means rolled back, no entry means no change
type txStateChanges map[common.Hash]bool
// setState sets the status of a tx to either recently mined or recently rolled back
func (txc txStateChanges) setState(txHash common.Hash, mined bool) {
val, ent := txc[txHash]
if ent && (val != mined) {
delete(txc, txHash)
} else {
txc[txHash] = mined
}
}
// getLists creates lists of mined and rolled back tx hashes
func (txc txStateChanges) getLists() (mined []common.Hash, rollback []common.Hash) {
for hash, val := range txc {
if val {
mined = append(mined, hash)
} else {
rollback = append(rollback, hash)
}
}
return
}
// checkMinedTxs checks newly added blocks for the currently pending transactions
// and marks them as mined if necessary. It also stores block position in the db
// and adds them to the received txStateChanges map.
func (pool *TxPool) checkMinedTxs(ctx context.Context, hash common.Hash, idx uint64, txc txStateChanges) error {
//fmt.Println("checkMinedTxs")
if len(pool.pending) == 0 {
return nil
}
//fmt.Println("len(pool) =", len(pool.pending))
block, err := GetBlock(ctx, pool.odr, hash, idx)
var receipts types.Receipts
if err != nil {
//fmt.Println(err)
return err
}
//fmt.Println("len(block.Transactions()) =", len(block.Transactions()))
list := pool.mined[hash]
for i, tx := range block.Transactions() {
txHash := tx.Hash()
//fmt.Println(" txHash:", txHash)
if tx, ok := pool.pending[txHash]; ok {
//fmt.Println("TX FOUND")
if receipts == nil {
receipts, err = GetBlockReceipts(ctx, pool.odr, hash, idx)
if err != nil {
return err
}
if len(receipts) != len(block.Transactions()) {
panic(nil) // should never happen if hashes did match
}
core.SetReceiptsData(block, receipts)
}
//fmt.Println("WriteReceipt", receipts[i].TxHash)
core.WriteReceipt(pool.chainDb, receipts[i])
pool.storeTxBlockData(txHash, txBlockData{hash, idx, uint64(i)})
delete(pool.pending, txHash)
list = append(list, tx)
txc.setState(txHash, true)
}
}
if list != nil {
pool.mined[hash] = list
}
return nil
}
// rollbackTxs marks the transactions contained in recently rolled back blocks
// as rolled back. It also removes block position info from the db and adds them
// to the received txStateChanges map.
func (pool *TxPool) rollbackTxs(hash common.Hash, txc txStateChanges) {
if list, ok := pool.mined[hash]; ok {
for _, tx := range list {
txHash := tx.Hash()
pool.removeTxBlockData(txHash)
pool.pending[txHash] = tx
txc.setState(txHash, false)
}
delete(pool.mined, hash)
}
}
// setNewHead sets a new head header, processing (and rolling back if necessary)
// the blocks since the last known head and returns a txStateChanges map containing
// the recently mined and rolled back transaction hashes. If an error (context
// timeout) occurs during checking new blocks, it leaves the locally known head
// at the latest checked block and still returns a valid txStateChanges, making it
// possible to continue checking the missing blocks at the next chain head event
func (pool *TxPool) setNewHead(ctx context.Context, newHeader *types.Header) (txStateChanges, error) {
txc := make(txStateChanges)
oldh := pool.chain.GetHeaderByHash(pool.head)
newh := newHeader
// find common ancestor, create list of rolled back and new block hashes
var oldHashes, newHashes []common.Hash
for oldh.Hash() != newh.Hash() {
if oldh.GetNumberU64() >= newh.GetNumberU64() {
oldHashes = append(oldHashes, oldh.Hash())
oldh = pool.chain.GetHeader(oldh.ParentHash, oldh.Number.Uint64()-1)
}
if oldh.GetNumberU64() < newh.GetNumberU64() {
newHashes = append(newHashes, newh.Hash())
newh = pool.chain.GetHeader(newh.ParentHash, newh.Number.Uint64()-1)
if newh == nil {
// happens when CHT syncing, nothing to do
newh = oldh
}
}
}
if oldh.GetNumberU64() < pool.clearIdx {
pool.clearIdx = oldh.GetNumberU64()
}
// roll back old blocks
for _, hash := range oldHashes {
pool.rollbackTxs(hash, txc)
}
pool.head = oldh.Hash()
// check mined txs of new blocks (array is in reversed order)
for i := len(newHashes) - 1; i >= 0; i-- {
hash := newHashes[i]
if err := pool.checkMinedTxs(ctx, hash, newHeader.GetNumberU64()-uint64(i), txc); err != nil {
return txc, err
}
pool.head = hash
}
// clear old mined tx entries of old blocks
if idx := newHeader.GetNumberU64(); idx > pool.clearIdx+txPermanent {
idx2 := idx - txPermanent
for i := pool.clearIdx; i < idx2; i++ {
hash := core.GetCanonicalHash(pool.chainDb, i)
if list, ok := pool.mined[hash]; ok {
hashes := make([]common.Hash, len(list))
for i, tx := range list {
hashes[i] = tx.Hash()
}
pool.relay.Discard(hashes)
delete(pool.mined, hash)
}
}
pool.clearIdx = idx2
}
return txc, nil
}
// blockCheckTimeout is the time limit for checking new blocks for mined
// transactions. Checking resumes at the next chain head event if timed out.
const blockCheckTimeout = time.Second * 3
// eventLoop processes chain head events and also notifies the tx relay backend
// about the new head hash and tx state changes
func (pool *TxPool) eventLoop() {
for ev := range pool.events.Chan() {
switch ev.Data.(type) {
case core.ChainHeadEvent:
pool.mu.Lock()
ctx, _ := context.WithTimeout(context.Background(), blockCheckTimeout)
head := pool.chain.CurrentHeader()
txc, _ := pool.setNewHead(ctx, head)
m, r := txc.getLists()
pool.relay.NewHead(pool.head, m, r)
pool.homestead = pool.config.IsHomestead(head.Number)
pool.mu.Unlock()
}
}
}
// Stop stops the light transaction pool
func (pool *TxPool) Stop() {
close(pool.quit)
pool.events.Unsubscribe()
glog.V(logger.Info).Infoln("Transaction pool stopped")
}
// Stats returns the number of currently pending (locally created) transactions
func (pool *TxPool) Stats() (pending int) {
pool.mu.RLock()
defer pool.mu.RUnlock()
pending = len(pool.pending)
return
}
// validateTx checks whether a transaction is valid according to the consensus rules.
func (pool *TxPool) validateTx(ctx context.Context, tx *types.Transaction) error {
// Validate sender
var (
from common.Address
err error
)
// Validate the transaction sender and it's sig. Throw
// if the from fields is invalid.
if from, err = tx.From(); err != nil {
return core.ErrInvalidSender
}
// Make sure the account exist. Non existent accounts
// haven't got funds and well therefor never pass.
currentState := pool.currentState()
if h, err := currentState.HasAccount(ctx, from); err == nil {
if !h {
return core.ErrNonExistentAccount
}
} else {
return err
}
// Last but not least check for nonce errors
if n, err := currentState.GetNonce(ctx, from); err == nil {
if n > tx.Nonce() {
return core.ErrNonce
}
} else {
return err
}
// Check the transaction doesn't exceed the current
// block limit gas.
header := pool.chain.GetHeaderByHash(pool.head)
if header.GasLimit.Cmp(tx.Gas()) < 0 {
return core.ErrGasLimit
}
// Transactions can't be negative. This may never happen
// using RLP decoded transactions but may occur if you create
// a transaction using the RPC for example.
if tx.Value().Cmp(common.Big0) < 0 {
return core.ErrNegativeValue
}
// Transactor should have enough funds to cover the costs
// cost == V + GP * GL
if b, err := currentState.GetBalance(ctx, from); err == nil {
if b.Cmp(tx.Cost()) < 0 {
return core.ErrInsufficientFunds
}
} else {
return err
}
// Should supply enough intrinsic gas
if tx.Gas().Cmp(core.IntrinsicGas(tx.Data(), core.MessageCreatesContract(tx), pool.homestead)) < 0 {
return core.ErrIntrinsicGas
}
return nil
}
// add validates a new transaction and sets its state pending if processable.
// It also updates the locally stored nonce if necessary.
func (self *TxPool) add(ctx context.Context, tx *types.Transaction) error {
hash := tx.Hash()
if self.pending[hash] != nil {
return fmt.Errorf("Known transaction (%x)", hash[:4])
}
err := self.validateTx(ctx, tx)
if err != nil {
return err
}
if _, ok := self.pending[hash]; !ok {
self.pending[hash] = tx
nonce := tx.Nonce() + 1
addr, _ := tx.From()
if nonce > self.nonce[addr] {
self.nonce[addr] = nonce
}
// Notify the subscribers. This event is posted in a goroutine
// because it's possible that somewhere during the post "Remove transaction"
// gets called which will then wait for the global tx pool lock and deadlock.
go self.eventMux.Post(core.TxPreEvent{Tx: tx})
}
if glog.V(logger.Debug) {
var toname string
if to := tx.To(); to != nil {
toname = common.Bytes2Hex(to[:4])
} else {
toname = "[NEW_CONTRACT]"
}
// we can ignore the error here because From is
// verified in ValidateTransaction.
f, _ := tx.From()
from := common.Bytes2Hex(f[:4])
glog.Infof("(t) %x => %s (%v) %x\n", from, toname, tx.Value, hash)
}
return nil
}
// Add adds a transaction to the pool if valid and passes it to the tx relay
// backend
func (self *TxPool) Add(ctx context.Context, tx *types.Transaction) error {
self.mu.Lock()
defer self.mu.Unlock()
data, err := rlp.EncodeToBytes(tx)
if err != nil {
return err
}
if err := self.add(ctx, tx); err != nil {
return err
}
//fmt.Println("Send", tx.Hash())
self.relay.Send(types.Transactions{tx})
self.chainDb.Put(tx.Hash().Bytes(), data)
return nil
}
// AddTransactions adds all valid transactions to the pool and passes them to
// the tx relay backend
func (self *TxPool) AddBatch(ctx context.Context, txs []*types.Transaction) {
self.mu.Lock()
defer self.mu.Unlock()
var sendTx types.Transactions
for _, tx := range txs {
if err := self.add(ctx, tx); err != nil {
glog.V(logger.Debug).Infoln("tx error:", err)
} else {
sendTx = append(sendTx, tx)
h := tx.Hash()
glog.V(logger.Debug).Infof("tx %x\n", h[:4])
}
}
if len(sendTx) > 0 {
self.relay.Send(sendTx)
}
}
// GetTransaction returns a transaction if it is contained in the pool
// and nil otherwise.
func (tp *TxPool) GetTransaction(hash common.Hash) *types.Transaction {
// check the txs first
if tx, ok := tp.pending[hash]; ok {
return tx
}
return nil
}
// GetTransactions returns all currently processable transactions.
// The returned slice may be modified by the caller.
func (self *TxPool) GetTransactions() (txs types.Transactions) {
self.mu.RLock()
defer self.mu.RUnlock()
txs = make(types.Transactions, len(self.pending))
i := 0
for _, tx := range self.pending {
txs[i] = tx
i++
}
return txs
}
// Content retrieves the data content of the transaction pool, returning all the
// pending as well as queued transactions, grouped by account and nonce.
func (self *TxPool) Content() (map[common.Address]types.Transactions, map[common.Address]types.Transactions) {
self.mu.RLock()
defer self.mu.RUnlock()
// Retrieve all the pending transactions and sort by account and by nonce
pending := make(map[common.Address]types.Transactions)
for _, tx := range self.pending {
account, _ := tx.From()
pending[account] = append(pending[account], tx)
}
// There are no queued transactions in a light pool, just return an empty map
queued := make(map[common.Address]types.Transactions)
return pending, queued
}
// RemoveTransactions removes all given transactions from the pool.
func (self *TxPool) RemoveTransactions(txs types.Transactions) {
self.mu.Lock()
defer self.mu.Unlock()
var hashes []common.Hash
for _, tx := range txs {
//self.RemoveTx(tx.Hash())
hash := tx.Hash()
delete(self.pending, hash)
self.chainDb.Delete(hash[:])
hashes = append(hashes, hash)
}
self.relay.Discard(hashes)
}
// RemoveTx removes the transaction with the given hash from the pool.
func (pool *TxPool) RemoveTx(hash common.Hash) {
pool.mu.Lock()
defer pool.mu.Unlock()
// delete from pending pool
delete(pool.pending, hash)
pool.chainDb.Delete(hash[:])
pool.relay.Discard([]common.Hash{hash})
}

140
light/txpool_test.go Normal file
View File

@@ -0,0 +1,140 @@
// Copyright 2014 The go-ethereum Authors
// This file is part of the go-ethereum library.
//
// The go-ethereum library is free software: you can redistribute it and/or modify
// it under the terms of the GNU Lesser General Public License as published by
// the Free Software Foundation, either version 3 of the License, or
// (at your option) any later version.
//
// The go-ethereum library is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
// GNU Lesser General Public License for more details.
//
// You should have received a copy of the GNU Lesser General Public License
// along with the go-ethereum library. If not, see <http://www.gnu.org/licenses/>.
package light
import (
"math"
"math/big"
"testing"
"time"
"github.com/ethereum/go-ethereum/common"
"github.com/ethereum/go-ethereum/core"
"github.com/ethereum/go-ethereum/core/types"
"github.com/ethereum/go-ethereum/ethdb"
"github.com/ethereum/go-ethereum/event"
"github.com/ethereum/go-ethereum/params"
"golang.org/x/net/context"
)
type testTxRelay struct {
send, nhMined, nhRollback, discard int
}
func (self *testTxRelay) Send(txs types.Transactions) {
self.send = len(txs)
}
func (self *testTxRelay) NewHead(head common.Hash, mined []common.Hash, rollback []common.Hash) {
self.nhMined = len(mined)
self.nhRollback = len(rollback)
}
func (self *testTxRelay) Discard(hashes []common.Hash) {
self.discard = len(hashes)
}
const poolTestTxs = 1000
const poolTestBlocks = 100
// test tx 0..n-1
var testTx [poolTestTxs]*types.Transaction
// txs sent before block i
func sentTx(i int) int {
return int(math.Pow(float64(i)/float64(poolTestBlocks), 0.9) * poolTestTxs)
}
// txs included in block i or before that (minedTx(i) <= sentTx(i))
func minedTx(i int) int {
return int(math.Pow(float64(i)/float64(poolTestBlocks), 1.1) * poolTestTxs)
}
func txPoolTestChainGen(i int, block *core.BlockGen) {
s := minedTx(i)
e := minedTx(i + 1)
for i := s; i < e; i++ {
block.AddTx(testTx[i])
}
}
func TestTxPool(t *testing.T) {
for i, _ := range testTx {
testTx[i], _ = types.NewTransaction(uint64(i), acc1Addr, big.NewInt(10000), params.TxGas, nil, nil).SignECDSA(testBankKey)
}
var (
evmux = new(event.TypeMux)
pow = new(core.FakePow)
sdb, _ = ethdb.NewMemDatabase()
ldb, _ = ethdb.NewMemDatabase()
genesis = core.WriteGenesisBlockForTesting(sdb, core.GenesisAccount{Address: testBankAddress, Balance: testBankFunds})
)
core.WriteGenesisBlockForTesting(ldb, core.GenesisAccount{Address: testBankAddress, Balance: testBankFunds})
// Assemble the test environment
blockchain, _ := core.NewBlockChain(sdb, testChainConfig(), pow, evmux)
gchain, _ := core.GenerateChain(nil, genesis, sdb, poolTestBlocks, txPoolTestChainGen)
if _, err := blockchain.InsertChain(gchain); err != nil {
panic(err)
}
odr := &testOdr{sdb: sdb, ldb: ldb}
relay := &testTxRelay{}
lightchain, _ := NewLightChain(odr, testChainConfig(), pow, evmux)
lightchain.SetValidator(bproc{})
txPermanent = 50
pool := NewTxPool(testChainConfig(), evmux, lightchain, relay)
for ii, block := range gchain {
i := ii + 1
ctx, _ := context.WithTimeout(context.Background(), 200*time.Millisecond)
s := sentTx(i - 1)
e := sentTx(i)
for i := s; i < e; i++ {
relay.send = 0
pool.Add(ctx, testTx[i])
got := relay.send
exp := 1
if got != exp {
t.Errorf("relay.Send expected len = %d, got %d", exp, got)
}
}
relay.nhMined = 0
relay.nhRollback = 0
relay.discard = 0
if _, err := lightchain.InsertHeaderChain([]*types.Header{block.Header()}, 1); err != nil {
panic(err)
}
time.Sleep(time.Millisecond * 30)
got := relay.nhMined
exp := minedTx(i) - minedTx(i-1)
if got != exp {
t.Errorf("relay.NewHead expected len(mined) = %d, got %d", exp, got)
}
got = relay.discard
exp = 0
if i > int(txPermanent)+1 {
exp = minedTx(i-int(txPermanent)-1) - minedTx(i-int(txPermanent)-2)
}
if got != exp {
t.Errorf("relay.Discard expected len = %d, got %d", exp, got)
}
}
}

271
light/vm_env.go Normal file
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// Copyright 2015 The go-ethereum Authors
// This file is part of the go-ethereum library.
//
// The go-ethereum library is free software: you can redistribute it and/or modify
// it under the terms of the GNU Lesser General Public License as published by
// the Free Software Foundation, either version 3 of the License, or
// (at your option) any later version.
//
// The go-ethereum library is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
// GNU Lesser General Public License for more details.
//
// You should have received a copy of the GNU Lesser General Public License
// along with the go-ethereum library. If not, see <http://www.gnu.org/licenses/>.
package light
import (
"math/big"
"github.com/ethereum/go-ethereum/common"
"github.com/ethereum/go-ethereum/core"
"github.com/ethereum/go-ethereum/core/types"
"github.com/ethereum/go-ethereum/core/vm"
"github.com/ethereum/go-ethereum/crypto"
"golang.org/x/net/context"
)
// VMEnv is the light client version of the vm execution environment.
// Unlike other structures, VMEnv holds a context that is applied by state
// retrieval requests through the entire execution. If any state operation
// returns an error, the execution fails.
type VMEnv struct {
vm.Environment
ctx context.Context
chainConfig *core.ChainConfig
evm *vm.EVM
state *VMState
header *types.Header
msg core.Message
depth int
chain *LightChain
err error
}
// NewEnv creates a new execution environment based on an ODR capable light state
func NewEnv(ctx context.Context, state *LightState, chainConfig *core.ChainConfig, chain *LightChain, msg core.Message, header *types.Header, cfg vm.Config) *VMEnv {
env := &VMEnv{
chainConfig: chainConfig,
chain: chain,
header: header,
msg: msg,
}
env.state = &VMState{ctx: ctx, state: state, env: env}
env.evm = vm.New(env, cfg)
return env
}
func (self *VMEnv) RuleSet() vm.RuleSet { return self.chainConfig }
func (self *VMEnv) Vm() vm.Vm { return self.evm }
func (self *VMEnv) Origin() common.Address { f, _ := self.msg.From(); return f }
func (self *VMEnv) BlockNumber() *big.Int { return self.header.Number }
func (self *VMEnv) Coinbase() common.Address { return self.header.Coinbase }
func (self *VMEnv) Time() *big.Int { return self.header.Time }
func (self *VMEnv) Difficulty() *big.Int { return self.header.Difficulty }
func (self *VMEnv) GasLimit() *big.Int { return self.header.GasLimit }
func (self *VMEnv) Db() vm.Database { return self.state }
func (self *VMEnv) Depth() int { return self.depth }
func (self *VMEnv) SetDepth(i int) { self.depth = i }
func (self *VMEnv) GetHash(n uint64) common.Hash {
for header := self.chain.GetHeader(self.header.ParentHash, self.header.Number.Uint64()-1); header != nil; header = self.chain.GetHeader(header.ParentHash, header.Number.Uint64()-1) {
if header.GetNumberU64() == n {
return header.Hash()
}
}
return common.Hash{}
}
func (self *VMEnv) AddLog(log *vm.Log) {
//self.state.AddLog(log)
}
func (self *VMEnv) CanTransfer(from common.Address, balance *big.Int) bool {
return self.state.GetBalance(from).Cmp(balance) >= 0
}
func (self *VMEnv) SnapshotDatabase() int {
return self.state.SnapshotDatabase()
}
func (self *VMEnv) RevertToSnapshot(idx int) {
self.state.RevertToSnapshot(idx)
}
func (self *VMEnv) Transfer(from, to vm.Account, amount *big.Int) {
core.Transfer(from, to, amount)
}
func (self *VMEnv) Call(me vm.ContractRef, addr common.Address, data []byte, gas, price, value *big.Int) ([]byte, error) {
return core.Call(self, me, addr, data, gas, price, value)
}
func (self *VMEnv) CallCode(me vm.ContractRef, addr common.Address, data []byte, gas, price, value *big.Int) ([]byte, error) {
return core.CallCode(self, me, addr, data, gas, price, value)
}
func (self *VMEnv) DelegateCall(me vm.ContractRef, addr common.Address, data []byte, gas, price *big.Int) ([]byte, error) {
return core.DelegateCall(self, me, addr, data, gas, price)
}
func (self *VMEnv) Create(me vm.ContractRef, data []byte, gas, price, value *big.Int) ([]byte, common.Address, error) {
return core.Create(self, me, data, gas, price, value)
}
// Error returns the error (if any) that happened during execution.
func (self *VMEnv) Error() error {
return self.err
}
// VMState is a wrapper for the light state that holds the actual context and
// passes it to any state operation that requires it.
type VMState struct {
vm.Database
ctx context.Context
state *LightState
snapshots []*LightState
env *VMEnv
}
// errHandler handles and stores any state error that happens during execution.
func (s *VMState) errHandler(err error) {
if err != nil && s.env.err == nil {
s.env.err = err
}
}
func (self *VMState) SnapshotDatabase() int {
self.snapshots = append(self.snapshots, self.state.Copy())
return len(self.snapshots) - 1
}
func (self *VMState) RevertToSnapshot(idx int) {
self.state.Set(self.snapshots[idx])
self.snapshots = self.snapshots[:idx]
}
// GetAccount returns the account object of the given account or nil if the
// account does not exist
func (s *VMState) GetAccount(addr common.Address) vm.Account {
so, err := s.state.GetStateObject(s.ctx, addr)
s.errHandler(err)
if err != nil {
// return a dummy state object to avoid panics
so = s.state.newStateObject(addr)
}
return so
}
// CreateAccount creates creates a new account object and takes ownership.
func (s *VMState) CreateAccount(addr common.Address) vm.Account {
so, err := s.state.CreateStateObject(s.ctx, addr)
s.errHandler(err)
if err != nil {
// return a dummy state object to avoid panics
so = s.state.newStateObject(addr)
}
return so
}
// AddBalance adds the given amount to the balance of the specified account
func (s *VMState) AddBalance(addr common.Address, amount *big.Int) {
err := s.state.AddBalance(s.ctx, addr, amount)
s.errHandler(err)
}
// GetBalance retrieves the balance from the given address or 0 if the account does
// not exist
func (s *VMState) GetBalance(addr common.Address) *big.Int {
res, err := s.state.GetBalance(s.ctx, addr)
s.errHandler(err)
return res
}
// GetNonce returns the nonce at the given address or 0 if the account does
// not exist
func (s *VMState) GetNonce(addr common.Address) uint64 {
res, err := s.state.GetNonce(s.ctx, addr)
s.errHandler(err)
return res
}
// SetNonce sets the nonce of the specified account
func (s *VMState) SetNonce(addr common.Address, nonce uint64) {
err := s.state.SetNonce(s.ctx, addr, nonce)
s.errHandler(err)
}
// GetCode returns the contract code at the given address or nil if the account
// does not exist
func (s *VMState) GetCode(addr common.Address) []byte {
res, err := s.state.GetCode(s.ctx, addr)
s.errHandler(err)
return res
}
// GetCodeHash returns the contract code hash at the given address
func (s *VMState) GetCodeHash(addr common.Address) common.Hash {
res, err := s.state.GetCode(s.ctx, addr)
s.errHandler(err)
return crypto.Keccak256Hash(res)
}
// GetCodeSize returns the contract code size at the given address
func (s *VMState) GetCodeSize(addr common.Address) int {
res, err := s.state.GetCode(s.ctx, addr)
s.errHandler(err)
return len(res)
}
// SetCode sets the contract code at the specified account
func (s *VMState) SetCode(addr common.Address, code []byte) {
err := s.state.SetCode(s.ctx, addr, code)
s.errHandler(err)
}
// AddRefund adds an amount to the refund value collected during a vm execution
func (s *VMState) AddRefund(gas *big.Int) {
s.state.AddRefund(gas)
}
// GetRefund returns the refund value collected during a vm execution
func (s *VMState) GetRefund() *big.Int {
return s.state.GetRefund()
}
// GetState returns the contract storage value at storage address b from the
// contract address a or common.Hash{} if the account does not exist
func (s *VMState) GetState(a common.Address, b common.Hash) common.Hash {
res, err := s.state.GetState(s.ctx, a, b)
s.errHandler(err)
return res
}
// SetState sets the storage value at storage address key of the account addr
func (s *VMState) SetState(addr common.Address, key common.Hash, value common.Hash) {
err := s.state.SetState(s.ctx, addr, key, value)
s.errHandler(err)
}
// Suicide marks an account to be removed and clears its balance
func (s *VMState) Suicide(addr common.Address) bool {
res, err := s.state.Suicide(s.ctx, addr)
s.errHandler(err)
return res
}
// Exist returns true if an account exists at the given address
func (s *VMState) Exist(addr common.Address) bool {
res, err := s.state.HasAccount(s.ctx, addr)
s.errHandler(err)
return res
}
// HasSuicided returns true if the given account has been marked for deletion
// or false if the account does not exist
func (s *VMState) HasSuicided(addr common.Address) bool {
res, err := s.state.HasSuicided(s.ctx, addr)
s.errHandler(err)
return res
}