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api_backend.go
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api_backend.go
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// Copyright 2016 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 les
import (
"context"
"errors"
"math/big"
"time"
"github.com/ethereum/go-ethereum/accounts"
"github.com/ethereum/go-ethereum/common"
"github.com/ethereum/go-ethereum/common/math"
"github.com/ethereum/go-ethereum/core"
"github.com/ethereum/go-ethereum/core/bloombits"
"github.com/ethereum/go-ethereum/core/rawdb"
"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/eth/downloader"
"github.com/ethereum/go-ethereum/eth/gasprice"
"github.com/ethereum/go-ethereum/ethdb"
"github.com/ethereum/go-ethereum/event"
"github.com/ethereum/go-ethereum/light"
"github.com/ethereum/go-ethereum/params"
"github.com/ethereum/go-ethereum/rpc"
)
type LesApiBackend struct {
extRPCEnabled bool
eth *LightEthereum
gpo *gasprice.Oracle
}
func (b *LesApiBackend) ChainConfig() *params.ChainConfig {
return b.eth.chainConfig
}
func (b *LesApiBackend) CurrentBlock() *types.Block {
return types.NewBlockWithHeader(b.eth.BlockChain().CurrentHeader())
}
func (b *LesApiBackend) SetHead(number uint64) {
b.eth.handler.downloader.Cancel()
b.eth.blockchain.SetHead(number)
}
func (b *LesApiBackend) HeaderByNumber(ctx context.Context, number rpc.BlockNumber) (*types.Header, error) {
if number == rpc.LatestBlockNumber || number == rpc.PendingBlockNumber {
return b.eth.blockchain.CurrentHeader(), nil
}
return b.eth.blockchain.GetHeaderByNumberOdr(ctx, uint64(number))
}
func (b *LesApiBackend) HeaderByNumberOrHash(ctx context.Context, blockNrOrHash rpc.BlockNumberOrHash) (*types.Header, error) {
if blockNr, ok := blockNrOrHash.Number(); ok {
return b.HeaderByNumber(ctx, blockNr)
}
if hash, ok := blockNrOrHash.Hash(); ok {
header, err := b.HeaderByHash(ctx, hash)
if err != nil {
return nil, err
}
if header == nil {
return nil, errors.New("header for hash not found")
}
if blockNrOrHash.RequireCanonical && b.eth.blockchain.GetCanonicalHash(header.Number.Uint64()) != hash {
return nil, errors.New("hash is not currently canonical")
}
return header, nil
}
return nil, errors.New("invalid arguments; neither block nor hash specified")
}
func (b *LesApiBackend) HeaderByHash(ctx context.Context, hash common.Hash) (*types.Header, error) {
return b.eth.blockchain.GetHeaderByHash(hash), nil
}
func (b *LesApiBackend) BlockByNumber(ctx context.Context, number rpc.BlockNumber) (*types.Block, error) {
header, err := b.HeaderByNumber(ctx, number)
if header == nil || err != nil {
return nil, err
}
return b.BlockByHash(ctx, header.Hash())
}
func (b *LesApiBackend) BlockByHash(ctx context.Context, hash common.Hash) (*types.Block, error) {
return b.eth.blockchain.GetBlockByHash(ctx, hash)
}
func (b *LesApiBackend) BlockByNumberOrHash(ctx context.Context, blockNrOrHash rpc.BlockNumberOrHash) (*types.Block, error) {
if blockNr, ok := blockNrOrHash.Number(); ok {
return b.BlockByNumber(ctx, blockNr)
}
if hash, ok := blockNrOrHash.Hash(); ok {
block, err := b.BlockByHash(ctx, hash)
if err != nil {
return nil, err
}
if block == nil {
return nil, errors.New("header found, but block body is missing")
}
if blockNrOrHash.RequireCanonical && b.eth.blockchain.GetCanonicalHash(block.NumberU64()) != hash {
return nil, errors.New("hash is not currently canonical")
}
return block, nil
}
return nil, errors.New("invalid arguments; neither block nor hash specified")
}
func (b *LesApiBackend) StateAndHeaderByNumber(ctx context.Context, number rpc.BlockNumber) (vm.MinimalApiState, *types.Header, error) {
header, err := b.HeaderByNumber(ctx, number)
if err != nil {
return nil, nil, err
}
if header == nil {
return nil, nil, errors.New("header not found")
}
return light.NewState(ctx, header, b.eth.odr), header, nil
}
func (b *LesApiBackend) StateAndHeaderByNumberOrHash(ctx context.Context, blockNrOrHash rpc.BlockNumberOrHash) (vm.MinimalApiState, *types.Header, error) {
if blockNr, ok := blockNrOrHash.Number(); ok {
return b.StateAndHeaderByNumber(ctx, blockNr)
}
if hash, ok := blockNrOrHash.Hash(); ok {
header := b.eth.blockchain.GetHeaderByHash(hash)
if header == nil {
return nil, nil, errors.New("header for hash not found")
}
if blockNrOrHash.RequireCanonical && b.eth.blockchain.GetCanonicalHash(header.Number.Uint64()) != hash {
return nil, nil, errors.New("hash is not currently canonical")
}
return light.NewState(ctx, header, b.eth.odr), header, nil
}
return nil, nil, errors.New("invalid arguments; neither block nor hash specified")
}
func (b *LesApiBackend) GetReceipts(ctx context.Context, hash common.Hash) (types.Receipts, error) {
if number := rawdb.ReadHeaderNumber(b.eth.chainDb, hash); number != nil {
return light.GetBlockReceipts(ctx, b.eth.odr, hash, *number)
}
return nil, nil
}
func (b *LesApiBackend) GetLogs(ctx context.Context, hash common.Hash) ([][]*types.Log, error) {
if number := rawdb.ReadHeaderNumber(b.eth.chainDb, hash); number != nil {
return light.GetBlockLogs(ctx, b.eth.odr, hash, *number)
}
return nil, nil
}
func (b *LesApiBackend) GetTd(hash common.Hash) *big.Int {
return b.eth.blockchain.GetTdByHash(hash)
}
func (b *LesApiBackend) GetEVM(ctx context.Context, msg core.Message, apiState vm.MinimalApiState, header *types.Header) (*vm.EVM, func() error, error) {
statedb := apiState.(*state.StateDB)
statedb.SetBalance(msg.From(), math.MaxBig256)
context := core.NewEVMContext(msg, header, b.eth.blockchain, nil)
return vm.NewEVM(context, statedb, statedb, b.eth.chainConfig, vm.Config{}), statedb.Error, nil
}
func (b *LesApiBackend) SendTx(ctx context.Context, signedTx *types.Transaction) error {
return b.eth.txPool.Add(ctx, signedTx)
}
func (b *LesApiBackend) RemoveTx(txHash common.Hash) {
b.eth.txPool.RemoveTx(txHash)
}
func (b *LesApiBackend) GetPoolTransactions() (types.Transactions, error) {
return b.eth.txPool.GetTransactions()
}
func (b *LesApiBackend) GetPoolTransaction(txHash common.Hash) *types.Transaction {
return b.eth.txPool.GetTransaction(txHash)
}
func (b *LesApiBackend) GetTransaction(ctx context.Context, txHash common.Hash) (*types.Transaction, common.Hash, uint64, uint64, error) {
return light.GetTransaction(ctx, b.eth.odr, txHash)
}
func (b *LesApiBackend) GetPoolNonce(ctx context.Context, addr common.Address) (uint64, error) {
return b.eth.txPool.GetNonce(ctx, addr)
}
func (b *LesApiBackend) Stats() (pending int, queued int) {
return b.eth.txPool.Stats(), 0
}
func (b *LesApiBackend) TxPoolContent() (map[common.Address]types.Transactions, map[common.Address]types.Transactions) {
return b.eth.txPool.Content()
}
func (b *LesApiBackend) SubscribeNewTxsEvent(ch chan<- core.NewTxsEvent) event.Subscription {
return b.eth.txPool.SubscribeNewTxsEvent(ch)
}
func (b *LesApiBackend) SubscribeChainEvent(ch chan<- core.ChainEvent) event.Subscription {
return b.eth.blockchain.SubscribeChainEvent(ch)
}
func (b *LesApiBackend) SubscribeChainHeadEvent(ch chan<- core.ChainHeadEvent) event.Subscription {
return b.eth.blockchain.SubscribeChainHeadEvent(ch)
}
func (b *LesApiBackend) SubscribeChainSideEvent(ch chan<- core.ChainSideEvent) event.Subscription {
return b.eth.blockchain.SubscribeChainSideEvent(ch)
}
func (b *LesApiBackend) SubscribeLogsEvent(ch chan<- []*types.Log) event.Subscription {
return b.eth.blockchain.SubscribeLogsEvent(ch)
}
func (b *LesApiBackend) SubscribeRemovedLogsEvent(ch chan<- core.RemovedLogsEvent) event.Subscription {
return b.eth.blockchain.SubscribeRemovedLogsEvent(ch)
}
func (b *LesApiBackend) Downloader() *downloader.Downloader {
return b.eth.Downloader()
}
func (b *LesApiBackend) ProtocolVersion() int {
return b.eth.LesVersion() + 10000
}
func (b *LesApiBackend) SuggestPrice(ctx context.Context) (*big.Int, error) {
return b.gpo.SuggestPrice(ctx)
}
func (b *LesApiBackend) ChainDb() ethdb.Database {
return b.eth.chainDb
}
func (b *LesApiBackend) EventMux() *event.TypeMux {
return b.eth.eventMux
}
func (b *LesApiBackend) AccountManager() *accounts.Manager {
return b.eth.accountManager
}
func (b *LesApiBackend) ExtRPCEnabled() bool {
return b.extRPCEnabled
}
func (b *LesApiBackend) CallTimeOut() time.Duration {
return b.eth.config.EVMCallTimeOut
}
func (b *LesApiBackend) RPCGasCap() *big.Int {
return b.eth.config.RPCGasCap
}
func (b *LesApiBackend) BloomStatus() (uint64, uint64) {
if b.eth.bloomIndexer == nil {
return 0, 0
}
sections, _, _ := b.eth.bloomIndexer.Sections()
return params.BloomBitsBlocksClient, sections
}
func (b *LesApiBackend) ServiceFilter(ctx context.Context, session *bloombits.MatcherSession) {
for i := 0; i < bloomFilterThreads; i++ {
go session.Multiplex(bloomRetrievalBatch, bloomRetrievalWait, b.eth.bloomRequests)
}
}