From 9f8d192991c4f68fa14c91366722bbca601da117 Mon Sep 17 00:00:00 2001 From: Zsolt Felfoldi Date: Fri, 14 Oct 2016 05:51:29 +0200 Subject: les: light client protocol and API --- les/api_backend.go | 144 +++++++++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 144 insertions(+) create mode 100644 les/api_backend.go (limited to 'les/api_backend.go') diff --git a/les/api_backend.go b/les/api_backend.go new file mode 100644 index 000000000..d50b3ea33 --- /dev/null +++ b/les/api_backend.go @@ -0,0 +1,144 @@ +// Copyright 2015 The go-ethereum Authors +// This file is part of go-ethereum. +// +// go-ethereum is free software: you can redistribute it and/or modify +// it under the terms of the GNU General Public License as published by +// the Free Software Foundation, either version 3 of the License, or +// (at your option) any later version. +// +// go-ethereum 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 General Public License for more details. +// +// You should have received a copy of the GNU General Public License +// along with go-ethereum. If not, see . + +package les + +import ( + "math/big" + + "github.com/ethereum/go-ethereum/accounts" + "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/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/internal/ethapi" + "github.com/ethereum/go-ethereum/light" + rpc "github.com/ethereum/go-ethereum/rpc" + "golang.org/x/net/context" +) + +type LesApiBackend struct { + eth *LightEthereum + gpo *gasprice.LightPriceOracle +} + +func (b *LesApiBackend) SetHead(number uint64) { + b.eth.blockchain.SetHead(number) +} + +func (b *LesApiBackend) HeaderByNumber(ctx context.Context, blockNr rpc.BlockNumber) (*types.Header, error) { + if blockNr == rpc.LatestBlockNumber || blockNr == rpc.PendingBlockNumber { + return b.eth.blockchain.CurrentHeader(), nil + } + + return b.eth.blockchain.GetHeaderByNumberOdr(ctx, uint64(blockNr)) +} + +func (b *LesApiBackend) BlockByNumber(ctx context.Context, blockNr rpc.BlockNumber) (*types.Block, error) { + header, err := b.HeaderByNumber(ctx, blockNr) + if header == nil || err != nil { + return nil, err + } + return b.GetBlock(ctx, header.Hash()) +} + +func (b *LesApiBackend) StateAndHeaderByNumber(ctx context.Context, blockNr rpc.BlockNumber) (ethapi.State, *types.Header, error) { + header, err := b.HeaderByNumber(ctx, blockNr) + if header == nil || err != nil { + return nil, nil, err + } + return light.NewLightState(light.StateTrieID(header), b.eth.odr), header, nil +} + +func (b *LesApiBackend) GetBlock(ctx context.Context, blockHash common.Hash) (*types.Block, error) { + return b.eth.blockchain.GetBlockByHash(ctx, blockHash) +} + +func (b *LesApiBackend) GetReceipts(ctx context.Context, blockHash common.Hash) (types.Receipts, error) { + return light.GetBlockReceipts(ctx, b.eth.odr, blockHash, core.GetBlockNumber(b.eth.chainDb, blockHash)) +} + +func (b *LesApiBackend) GetTd(blockHash common.Hash) *big.Int { + return b.eth.blockchain.GetTdByHash(blockHash) +} + +func (b *LesApiBackend) GetVMEnv(ctx context.Context, msg core.Message, state ethapi.State, header *types.Header) (vm.Environment, func() error, error) { + stateDb := state.(*light.LightState).Copy() + addr, _ := msg.From() + from, err := stateDb.GetOrNewStateObject(ctx, addr) + if err != nil { + return nil, nil, err + } + from.SetBalance(common.MaxBig) + env := light.NewEnv(ctx, stateDb, b.eth.chainConfig, b.eth.blockchain, msg, header, b.eth.chainConfig.VmConfig) + return env, env.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 { + return b.eth.txPool.GetTransactions() +} + +func (b *LesApiBackend) GetPoolTransaction(txHash common.Hash) *types.Transaction { + return b.eth.txPool.GetTransaction(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) 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 +} -- cgit v1.2.3