c0c01612e9
This PR significantly changes the APIs for instantiating Ethereum nodes in a Go program. The new APIs are not backwards-compatible, but we feel that this is made up for by the much simpler way of registering services on node.Node. You can find more information and rationale in the design document: https://gist.github.com/renaynay/5bec2de19fde66f4d04c535fd24f0775. There is also a new feature in Node's Go API: it is now possible to register arbitrary handlers on the user-facing HTTP server. In geth, this facility is used to enable GraphQL. There is a single minor change relevant for geth users in this PR: The GraphQL API is no longer available separately from the JSON-RPC HTTP server. If you want GraphQL, you need to enable it using the ./geth --http --graphql flag combination. The --graphql.port and --graphql.addr flags are no longer available.
294 lines
9.7 KiB
Go
294 lines
9.7 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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"errors"
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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/consensus"
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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/rawdb"
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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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extRPCEnabled bool
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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.handler.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, number rpc.BlockNumber) (*types.Header, error) {
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if number == rpc.LatestBlockNumber || number == 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(number))
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}
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func (b *LesApiBackend) HeaderByNumberOrHash(ctx context.Context, blockNrOrHash rpc.BlockNumberOrHash) (*types.Header, error) {
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if blockNr, ok := blockNrOrHash.Number(); ok {
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return b.HeaderByNumber(ctx, blockNr)
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}
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if hash, ok := blockNrOrHash.Hash(); ok {
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header, err := b.HeaderByHash(ctx, hash)
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if err != nil {
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return nil, err
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}
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if header == nil {
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return nil, errors.New("header for hash not found")
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}
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if blockNrOrHash.RequireCanonical && b.eth.blockchain.GetCanonicalHash(header.Number.Uint64()) != hash {
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return nil, errors.New("hash is not currently canonical")
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}
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return header, nil
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}
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return nil, errors.New("invalid arguments; neither block nor hash specified")
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}
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func (b *LesApiBackend) HeaderByHash(ctx context.Context, hash common.Hash) (*types.Header, error) {
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return b.eth.blockchain.GetHeaderByHash(hash), nil
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}
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func (b *LesApiBackend) BlockByNumber(ctx context.Context, number rpc.BlockNumber) (*types.Block, error) {
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header, err := b.HeaderByNumber(ctx, number)
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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.BlockByHash(ctx, header.Hash())
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}
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func (b *LesApiBackend) BlockByHash(ctx context.Context, hash common.Hash) (*types.Block, error) {
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return b.eth.blockchain.GetBlockByHash(ctx, hash)
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}
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func (b *LesApiBackend) BlockByNumberOrHash(ctx context.Context, blockNrOrHash rpc.BlockNumberOrHash) (*types.Block, error) {
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if blockNr, ok := blockNrOrHash.Number(); ok {
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return b.BlockByNumber(ctx, blockNr)
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}
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if hash, ok := blockNrOrHash.Hash(); ok {
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block, err := b.BlockByHash(ctx, hash)
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if err != nil {
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return nil, err
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}
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if block == nil {
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return nil, errors.New("header found, but block body is missing")
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}
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if blockNrOrHash.RequireCanonical && b.eth.blockchain.GetCanonicalHash(block.NumberU64()) != hash {
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return nil, errors.New("hash is not currently canonical")
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}
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return block, nil
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}
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return nil, errors.New("invalid arguments; neither block nor hash specified")
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}
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func (b *LesApiBackend) StateAndHeaderByNumber(ctx context.Context, number rpc.BlockNumber) (*state.StateDB, *types.Header, error) {
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header, err := b.HeaderByNumber(ctx, number)
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if err != nil {
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return nil, nil, err
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}
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if header == nil {
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return nil, nil, errors.New("header not found")
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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) StateAndHeaderByNumberOrHash(ctx context.Context, blockNrOrHash rpc.BlockNumberOrHash) (*state.StateDB, *types.Header, error) {
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if blockNr, ok := blockNrOrHash.Number(); ok {
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return b.StateAndHeaderByNumber(ctx, blockNr)
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}
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if hash, ok := blockNrOrHash.Hash(); ok {
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header := b.eth.blockchain.GetHeaderByHash(hash)
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if header == nil {
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return nil, nil, errors.New("header for hash not found")
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}
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if blockNrOrHash.RequireCanonical && b.eth.blockchain.GetCanonicalHash(header.Number.Uint64()) != hash {
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return nil, nil, errors.New("hash is not currently canonical")
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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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return nil, nil, errors.New("invalid arguments; neither block nor hash specified")
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}
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func (b *LesApiBackend) GetReceipts(ctx context.Context, hash common.Hash) (types.Receipts, error) {
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if number := rawdb.ReadHeaderNumber(b.eth.chainDb, hash); number != nil {
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return light.GetBlockReceipts(ctx, b.eth.odr, hash, *number)
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}
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return nil, nil
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}
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func (b *LesApiBackend) GetLogs(ctx context.Context, hash common.Hash) ([][]*types.Log, error) {
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if number := rawdb.ReadHeaderNumber(b.eth.chainDb, hash); number != nil {
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return light.GetBlockLogs(ctx, b.eth.odr, hash, *number)
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}
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return nil, nil
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}
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func (b *LesApiBackend) GetTd(ctx context.Context, hash common.Hash) *big.Int {
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if number := rawdb.ReadHeaderNumber(b.eth.chainDb, hash); number != nil {
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return b.eth.blockchain.GetTdOdr(ctx, hash, *number)
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}
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return nil
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}
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func (b *LesApiBackend) GetEVM(ctx context.Context, msg core.Message, state *state.StateDB, header *types.Header) (*vm.EVM, func() error, error) {
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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, vm.Config{}), 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) GetTransaction(ctx context.Context, txHash common.Hash) (*types.Transaction, common.Hash, uint64, uint64, error) {
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return light.GetTransaction(ctx, b.eth.odr, 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) SubscribeNewTxsEvent(ch chan<- core.NewTxsEvent) event.Subscription {
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return b.eth.txPool.SubscribeNewTxsEvent(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) SubscribePendingLogsEvent(ch chan<- []*types.Log) event.Subscription {
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return event.NewSubscription(func(quit <-chan struct{}) error {
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<-quit
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return nil
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})
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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) AccountManager() *accounts.Manager {
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return b.eth.accountManager
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}
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func (b *LesApiBackend) ExtRPCEnabled() bool {
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return b.extRPCEnabled
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}
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func (b *LesApiBackend) RPCGasCap() uint64 {
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return b.eth.config.RPCGasCap
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}
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func (b *LesApiBackend) RPCTxFeeCap() float64 {
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return b.eth.config.RPCTxFeeCap
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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 params.BloomBitsBlocksClient, 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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func (b *LesApiBackend) Engine() consensus.Engine {
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return b.eth.engine
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}
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func (b *LesApiBackend) CurrentHeader() *types.Header {
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return b.eth.blockchain.CurrentHeader()
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}
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