ca376ead88
This PR implements the new LES protocol version extensions: * new and more efficient Merkle proofs reply format (when replying to a multiple Merkle proofs request, we just send a single set of trie nodes containing all necessary nodes) * BBT (BloomBitsTrie) works similarly to the existing CHT and contains the bloombits search data to speed up log searches * GetTxStatusMsg returns the inclusion position or the pending/queued/unknown state of a transaction referenced by hash * an optional signature of new block data (number/hash/td) can be included in AnnounceMsg to provide an option for "very light clients" (mobile/embedded devices) to skip expensive Ethash check and accept multiple signatures of somewhat trusted servers (still a lot better than trusting a single server completely and retrieving everything through RPC). The new client mode is not implemented in this PR, just the protocol extension.
189 lines
6.2 KiB
Go
189 lines
6.2 KiB
Go
// Copyright 2016 The go-ethereum Authors
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// This file is part of the go-ethereum library.
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//
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// The go-ethereum library is free software: you can redistribute it and/or modify
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// it under the terms of the GNU Lesser General Public License as published by
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// the Free Software Foundation, either version 3 of the License, or
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// (at your option) any later version.
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//
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// The go-ethereum library is distributed in the hope that it will be useful,
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// but WITHOUT ANY WARRANTY; without even the implied warranty of
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// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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// GNU Lesser General Public License for more details.
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//
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// You should have received a copy of the GNU Lesser General Public License
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// along with the go-ethereum library. If not, see <http://www.gnu.org/licenses/>.
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package les
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import (
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"context"
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"math/big"
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"github.com/ethereum/go-ethereum/accounts"
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"github.com/ethereum/go-ethereum/common"
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"github.com/ethereum/go-ethereum/common/math"
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"github.com/ethereum/go-ethereum/core"
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"github.com/ethereum/go-ethereum/core/bloombits"
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"github.com/ethereum/go-ethereum/core/state"
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"github.com/ethereum/go-ethereum/core/types"
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"github.com/ethereum/go-ethereum/core/vm"
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"github.com/ethereum/go-ethereum/eth/downloader"
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"github.com/ethereum/go-ethereum/eth/gasprice"
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"github.com/ethereum/go-ethereum/ethdb"
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"github.com/ethereum/go-ethereum/event"
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"github.com/ethereum/go-ethereum/light"
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"github.com/ethereum/go-ethereum/params"
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"github.com/ethereum/go-ethereum/rpc"
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)
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type LesApiBackend struct {
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eth *LightEthereum
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gpo *gasprice.Oracle
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}
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func (b *LesApiBackend) ChainConfig() *params.ChainConfig {
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return b.eth.chainConfig
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}
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func (b *LesApiBackend) CurrentBlock() *types.Block {
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return types.NewBlockWithHeader(b.eth.BlockChain().CurrentHeader())
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}
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func (b *LesApiBackend) SetHead(number uint64) {
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b.eth.protocolManager.downloader.Cancel()
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b.eth.blockchain.SetHead(number)
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}
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func (b *LesApiBackend) HeaderByNumber(ctx context.Context, blockNr rpc.BlockNumber) (*types.Header, error) {
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if blockNr == rpc.LatestBlockNumber || blockNr == rpc.PendingBlockNumber {
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return b.eth.blockchain.CurrentHeader(), nil
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}
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return b.eth.blockchain.GetHeaderByNumberOdr(ctx, uint64(blockNr))
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}
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func (b *LesApiBackend) BlockByNumber(ctx context.Context, blockNr rpc.BlockNumber) (*types.Block, error) {
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header, err := b.HeaderByNumber(ctx, blockNr)
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if header == nil || err != nil {
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return nil, err
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}
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return b.GetBlock(ctx, header.Hash())
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}
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func (b *LesApiBackend) StateAndHeaderByNumber(ctx context.Context, blockNr rpc.BlockNumber) (*state.StateDB, *types.Header, error) {
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header, err := b.HeaderByNumber(ctx, blockNr)
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if header == nil || err != nil {
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return nil, nil, err
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}
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return light.NewState(ctx, header, b.eth.odr), header, nil
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}
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func (b *LesApiBackend) GetBlock(ctx context.Context, blockHash common.Hash) (*types.Block, error) {
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return b.eth.blockchain.GetBlockByHash(ctx, blockHash)
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}
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func (b *LesApiBackend) GetReceipts(ctx context.Context, blockHash common.Hash) (types.Receipts, error) {
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return light.GetBlockReceipts(ctx, b.eth.odr, blockHash, core.GetBlockNumber(b.eth.chainDb, blockHash))
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}
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func (b *LesApiBackend) GetTd(blockHash common.Hash) *big.Int {
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return b.eth.blockchain.GetTdByHash(blockHash)
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}
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func (b *LesApiBackend) GetEVM(ctx context.Context, msg core.Message, state *state.StateDB, header *types.Header, vmCfg vm.Config) (*vm.EVM, func() error, error) {
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state.SetBalance(msg.From(), math.MaxBig256)
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context := core.NewEVMContext(msg, header, b.eth.blockchain, nil)
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return vm.NewEVM(context, state, b.eth.chainConfig, vmCfg), state.Error, nil
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}
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func (b *LesApiBackend) SendTx(ctx context.Context, signedTx *types.Transaction) error {
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return b.eth.txPool.Add(ctx, signedTx)
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}
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func (b *LesApiBackend) RemoveTx(txHash common.Hash) {
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b.eth.txPool.RemoveTx(txHash)
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}
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func (b *LesApiBackend) GetPoolTransactions() (types.Transactions, error) {
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return b.eth.txPool.GetTransactions()
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}
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func (b *LesApiBackend) GetPoolTransaction(txHash common.Hash) *types.Transaction {
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return b.eth.txPool.GetTransaction(txHash)
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}
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func (b *LesApiBackend) GetPoolNonce(ctx context.Context, addr common.Address) (uint64, error) {
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return b.eth.txPool.GetNonce(ctx, addr)
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}
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func (b *LesApiBackend) Stats() (pending int, queued int) {
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return b.eth.txPool.Stats(), 0
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}
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func (b *LesApiBackend) TxPoolContent() (map[common.Address]types.Transactions, map[common.Address]types.Transactions) {
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return b.eth.txPool.Content()
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}
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func (b *LesApiBackend) SubscribeTxPreEvent(ch chan<- core.TxPreEvent) event.Subscription {
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return b.eth.txPool.SubscribeTxPreEvent(ch)
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}
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func (b *LesApiBackend) SubscribeChainEvent(ch chan<- core.ChainEvent) event.Subscription {
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return b.eth.blockchain.SubscribeChainEvent(ch)
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}
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func (b *LesApiBackend) SubscribeChainHeadEvent(ch chan<- core.ChainHeadEvent) event.Subscription {
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return b.eth.blockchain.SubscribeChainHeadEvent(ch)
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}
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func (b *LesApiBackend) SubscribeChainSideEvent(ch chan<- core.ChainSideEvent) event.Subscription {
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return b.eth.blockchain.SubscribeChainSideEvent(ch)
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}
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func (b *LesApiBackend) SubscribeLogsEvent(ch chan<- []*types.Log) event.Subscription {
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return b.eth.blockchain.SubscribeLogsEvent(ch)
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}
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func (b *LesApiBackend) SubscribeRemovedLogsEvent(ch chan<- core.RemovedLogsEvent) event.Subscription {
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return b.eth.blockchain.SubscribeRemovedLogsEvent(ch)
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}
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func (b *LesApiBackend) Downloader() *downloader.Downloader {
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return b.eth.Downloader()
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}
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func (b *LesApiBackend) ProtocolVersion() int {
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return b.eth.LesVersion() + 10000
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}
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func (b *LesApiBackend) SuggestPrice(ctx context.Context) (*big.Int, error) {
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return b.gpo.SuggestPrice(ctx)
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}
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func (b *LesApiBackend) ChainDb() ethdb.Database {
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return b.eth.chainDb
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}
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func (b *LesApiBackend) EventMux() *event.TypeMux {
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return b.eth.eventMux
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}
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func (b *LesApiBackend) AccountManager() *accounts.Manager {
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return b.eth.accountManager
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}
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func (b *LesApiBackend) BloomStatus() (uint64, uint64) {
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if b.eth.bloomIndexer == nil {
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return 0, 0
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}
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sections, _, _ := b.eth.bloomIndexer.Sections()
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return light.BloomTrieFrequency, sections
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}
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func (b *LesApiBackend) ServiceFilter(ctx context.Context, session *bloombits.MatcherSession) {
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for i := 0; i < bloomFilterThreads; i++ {
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go session.Multiplex(bloomRetrievalBatch, bloomRetrievalWait, b.eth.bloomRequests)
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}
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}
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