// 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 eth import ( "context" "errors" "math/big" "github.com/ava-labs/coreth/accounts" "github.com/ava-labs/coreth/consensus" "github.com/ava-labs/coreth/core" "github.com/ava-labs/coreth/core/bloombits" "github.com/ava-labs/coreth/core/rawdb" "github.com/ava-labs/coreth/core/state" "github.com/ava-labs/coreth/core/types" "github.com/ava-labs/coreth/core/vm" "github.com/ava-labs/coreth/eth/gasprice" "github.com/ava-labs/coreth/miner" "github.com/ava-labs/coreth/params" "github.com/ava-labs/coreth/rpc" "github.com/ethereum/go-ethereum/common" "github.com/ethereum/go-ethereum/eth/downloader" "github.com/ethereum/go-ethereum/ethdb" "github.com/ethereum/go-ethereum/event" ) // EthAPIBackend implements ethapi.Backend for full nodes type EthAPIBackend struct { extRPCEnabled bool eth *Ethereum gpo *gasprice.Oracle } // ChainConfig returns the active chain configuration. func (b *EthAPIBackend) ChainConfig() *params.ChainConfig { return b.eth.blockchain.Config() } func (b *EthAPIBackend) CurrentBlock() *types.Block { return b.eth.blockchain.CurrentBlock() } func (b *EthAPIBackend) AcceptedBlock() *types.Block { return b.eth.AcceptedBlock() } func (b *EthAPIBackend) SetHead(number uint64) { //b.eth.protocolManager.downloader.Cancel() b.eth.blockchain.SetHead(number) } func (b *EthAPIBackend) HeaderByNumber(ctx context.Context, number rpc.BlockNumber) (*types.Header, error) { // Pending block is only known by the miner in // Ethereum, but Coreth does not have the same notion. // So we treat requests for the pending block identically // to the latest accepted block instead if number == rpc.PendingBlockNumber { return b.eth.AcceptedBlock().Header(), nil } // Otherwise resolve and return the block if number == rpc.LatestBlockNumber { return b.eth.blockchain.CurrentBlock().Header(), nil } if number == rpc.AcceptedBlockNumber { return b.eth.AcceptedBlock().Header(), nil } return b.eth.blockchain.GetHeaderByNumber(uint64(number)), nil } func (b *EthAPIBackend) 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 := b.eth.blockchain.GetHeaderByHash(hash) 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 *EthAPIBackend) HeaderByHash(ctx context.Context, hash common.Hash) (*types.Header, error) { return b.eth.blockchain.GetHeaderByHash(hash), nil } func (b *EthAPIBackend) BlockByNumber(ctx context.Context, number rpc.BlockNumber) (*types.Block, error) { // Pending block is only known by the miner in // Ethereum, but Coreth does not have the same notion. // So we treat requests for the pending block identically // to the latest accepted block instead if number == rpc.PendingBlockNumber { return b.eth.AcceptedBlock(), nil } // Otherwise resolve and return the block if number == rpc.LatestBlockNumber { return b.eth.blockchain.CurrentBlock(), nil } if number == rpc.AcceptedBlockNumber { return b.eth.AcceptedBlock(), nil } return b.eth.blockchain.GetBlockByNumber(uint64(number)), nil } func (b *EthAPIBackend) BlockByHash(ctx context.Context, hash common.Hash) (*types.Block, error) { return b.eth.blockchain.GetBlockByHash(hash), nil } func (b *EthAPIBackend) 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 { header := b.eth.blockchain.GetHeaderByHash(hash) 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") } block := b.eth.blockchain.GetBlock(hash, header.Number.Uint64()) if block == nil { return nil, errors.New("header found, but block body is missing") } return block, nil } return nil, errors.New("invalid arguments; neither block nor hash specified") } func (b *EthAPIBackend) StateAndHeaderByNumber(ctx context.Context, number rpc.BlockNumber) (*state.StateDB, *types.Header, error) { // Note: Ethereum typically first checks if the request is for // the pending block (by rpc.PendingBlockNumber), but Coreth // does not have the same notion of the miner having a pending // block, so this is skipped here // Request the block by its number and retrieve its state header, err := b.HeaderByNumber(ctx, number) if err != nil { return nil, nil, err } if header == nil { return nil, nil, errors.New("header not found") } stateDb, err := b.eth.BlockChain().StateAt(header.Root) return stateDb, header, err } func (b *EthAPIBackend) StateAndHeaderByNumberOrHash(ctx context.Context, blockNrOrHash rpc.BlockNumberOrHash) (*state.StateDB, *types.Header, error) { if blockNr, ok := blockNrOrHash.Number(); ok { return b.StateAndHeaderByNumber(ctx, blockNr) } if hash, ok := blockNrOrHash.Hash(); ok { header, err := b.HeaderByHash(ctx, hash) if err != nil { return nil, nil, err } 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") } stateDb, err := b.eth.BlockChain().StateAt(header.Root) return stateDb, header, err } return nil, nil, errors.New("invalid arguments; neither block nor hash specified") } func (b *EthAPIBackend) GetReceipts(ctx context.Context, hash common.Hash) (types.Receipts, error) { return b.eth.blockchain.GetReceiptsByHash(hash), nil } func (b *EthAPIBackend) GetLogs(ctx context.Context, hash common.Hash) ([][]*types.Log, error) { receipts := b.eth.blockchain.GetReceiptsByHash(hash) if receipts == nil { return nil, nil } logs := make([][]*types.Log, len(receipts)) for i, receipt := range receipts { logs[i] = receipt.Logs } return logs, nil } func (b *EthAPIBackend) GetTd(ctx context.Context, hash common.Hash) *big.Int { return b.eth.blockchain.GetTdByHash(hash) } func (b *EthAPIBackend) GetEVM(ctx context.Context, msg core.Message, state *state.StateDB, header *types.Header) (*vm.EVM, func() error, error) { vmError := func() error { return nil } context := core.NewEVMContext(msg, header, b.eth.BlockChain(), nil) return vm.NewEVM(context, state, b.eth.blockchain.Config(), *b.eth.blockchain.GetVMConfig()), vmError, nil } func (b *EthAPIBackend) SubscribeRemovedLogsEvent(ch chan<- core.RemovedLogsEvent) event.Subscription { return b.eth.BlockChain().SubscribeRemovedLogsEvent(ch) } func (b *EthAPIBackend) SubscribePendingLogsEvent(ch chan<- []*types.Log) event.Subscription { return b.eth.miner.SubscribePendingLogs(ch) } func (b *EthAPIBackend) SubscribeChainEvent(ch chan<- core.ChainEvent) event.Subscription { return b.eth.BlockChain().SubscribeChainEvent(ch) } func (b *EthAPIBackend) SubscribeChainHeadEvent(ch chan<- core.ChainHeadEvent) event.Subscription { return b.eth.BlockChain().SubscribeChainHeadEvent(ch) } func (b *EthAPIBackend) SubscribeChainSideEvent(ch chan<- core.ChainSideEvent) event.Subscription { return b.eth.BlockChain().SubscribeChainSideEvent(ch) } func (b *EthAPIBackend) SubscribeLogsEvent(ch chan<- []*types.Log) event.Subscription { return b.eth.BlockChain().SubscribeLogsEvent(ch) } func (b *EthAPIBackend) SendTx(ctx context.Context, signedTx *types.Transaction) error { err := b.eth.txPool.AddLocal(signedTx) select { case b.eth.txSubmitChan <- struct{}{}: default: } return err } func (b *EthAPIBackend) GetPoolTransactions() (types.Transactions, error) { pending, err := b.eth.txPool.Pending() if err != nil { return nil, err } var txs types.Transactions for _, batch := range pending { txs = append(txs, batch...) } return txs, nil } func (b *EthAPIBackend) GetPoolTransaction(hash common.Hash) *types.Transaction { return b.eth.txPool.Get(hash) } func (b *EthAPIBackend) GetTransaction(ctx context.Context, txHash common.Hash) (*types.Transaction, common.Hash, uint64, uint64, error) { tx, blockHash, blockNumber, index := rawdb.ReadTransaction(b.eth.ChainDb(), txHash) return tx, blockHash, blockNumber, index, nil } func (b *EthAPIBackend) GetPoolNonce(ctx context.Context, addr common.Address) (uint64, error) { return b.eth.txPool.Nonce(addr), nil } func (b *EthAPIBackend) Stats() (pending int, queued int) { return b.eth.txPool.Stats() } func (b *EthAPIBackend) TxPoolContent() (map[common.Address]types.Transactions, map[common.Address]types.Transactions) { return b.eth.TxPool().Content() } func (b *EthAPIBackend) TxPool() *core.TxPool { return b.eth.TxPool() } func (b *EthAPIBackend) SubscribeNewTxsEvent(ch chan<- core.NewTxsEvent) event.Subscription { return b.eth.TxPool().SubscribeNewTxsEvent(ch) } func (b *EthAPIBackend) Downloader() *downloader.Downloader { return b.eth.Downloader() } func (b *EthAPIBackend) ProtocolVersion() int { return b.eth.EthVersion() } func (b *EthAPIBackend) SuggestPrice(ctx context.Context) (*big.Int, error) { return b.gpo.SuggestPrice(ctx) } func (b *EthAPIBackend) ChainDb() ethdb.Database { return b.eth.ChainDb() } func (b *EthAPIBackend) EventMux() *event.TypeMux { return b.eth.EventMux() } func (b *EthAPIBackend) AccountManager() *accounts.Manager { return b.eth.AccountManager() } func (b *EthAPIBackend) ExtRPCEnabled() bool { return b.extRPCEnabled } func (b *EthAPIBackend) RPCGasCap() uint64 { return b.eth.config.RPCGasCap } func (b *EthAPIBackend) RPCTxFeeCap() float64 { return b.eth.config.RPCTxFeeCap } func (b *EthAPIBackend) BloomStatus() (uint64, uint64) { sections, _, _ := b.eth.bloomIndexer.Sections() return params.BloomBitsBlocks, sections } func (b *EthAPIBackend) ServiceFilter(ctx context.Context, session *bloombits.MatcherSession) { for i := 0; i < bloomFilterThreads; i++ { go session.Multiplex(bloomRetrievalBatch, bloomRetrievalWait, b.eth.bloomRequests) } } func (b *EthAPIBackend) Engine() consensus.Engine { return b.eth.engine } func (b *EthAPIBackend) CurrentHeader() *types.Header { return b.eth.blockchain.CurrentHeader() } func (b *EthAPIBackend) Miner() *miner.Miner { return b.eth.Miner() } func (b *EthAPIBackend) StartMining(threads int) error { return b.eth.StartMining(threads) }