forked from cerc-io/plugeth
bbc4ea4ae8
The run loop, which previously contained custom opcode executes have been removed and has been simplified to a few checks. Each operation consists of 4 elements: execution function, gas cost function, stack validation function and memory size function. The execution function implements the operation's runtime behaviour, the gas cost function implements the operation gas costs function and greatly depends on the memory and stack, the stack validation function validates the stack and makes sure that enough items can be popped off and pushed on and the memory size function calculates the memory required for the operation and returns it. This commit also allows the EVM to go unmetered. This is helpful for offline operations such as contract calls.
221 lines
6.6 KiB
Go
221 lines
6.6 KiB
Go
// Copyright 2015 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 eth
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import (
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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/core"
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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/internal/ethapi"
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"github.com/ethereum/go-ethereum/params"
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rpc "github.com/ethereum/go-ethereum/rpc"
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"golang.org/x/net/context"
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)
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// EthApiBackend implements ethapi.Backend for full nodes
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type EthApiBackend struct {
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eth *Ethereum
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gpo *gasprice.GasPriceOracle
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}
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func (b *EthApiBackend) ChainConfig() *params.ChainConfig {
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return b.eth.chainConfig
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}
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func (b *EthApiBackend) CurrentBlock() *types.Block {
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return b.eth.blockchain.CurrentBlock()
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}
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func (b *EthApiBackend) SetHead(number uint64) {
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b.eth.blockchain.SetHead(number)
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}
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func (b *EthApiBackend) HeaderByNumber(ctx context.Context, blockNr rpc.BlockNumber) (*types.Header, error) {
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// Pending block is only known by the miner
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if blockNr == rpc.PendingBlockNumber {
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block := b.eth.miner.PendingBlock()
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return block.Header(), nil
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}
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// Otherwise resolve and return the block
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if blockNr == rpc.LatestBlockNumber {
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return b.eth.blockchain.CurrentBlock().Header(), nil
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}
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return b.eth.blockchain.GetHeaderByNumber(uint64(blockNr)), nil
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}
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func (b *EthApiBackend) BlockByNumber(ctx context.Context, blockNr rpc.BlockNumber) (*types.Block, error) {
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// Pending block is only known by the miner
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if blockNr == rpc.PendingBlockNumber {
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block := b.eth.miner.PendingBlock()
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return block, nil
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}
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// Otherwise resolve and return the block
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if blockNr == rpc.LatestBlockNumber {
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return b.eth.blockchain.CurrentBlock(), nil
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}
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return b.eth.blockchain.GetBlockByNumber(uint64(blockNr)), nil
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}
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func (b *EthApiBackend) StateAndHeaderByNumber(ctx context.Context, blockNr rpc.BlockNumber) (ethapi.State, *types.Header, error) {
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// Pending state is only known by the miner
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if blockNr == rpc.PendingBlockNumber {
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block, state := b.eth.miner.Pending()
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return EthApiState{state}, block.Header(), nil
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}
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// Otherwise resolve the block number and return its state
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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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stateDb, err := b.eth.BlockChain().StateAt(header.Root)
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return EthApiState{stateDb}, header, err
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}
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func (b *EthApiBackend) GetBlock(ctx context.Context, blockHash common.Hash) (*types.Block, error) {
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return b.eth.blockchain.GetBlockByHash(blockHash), nil
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}
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func (b *EthApiBackend) GetReceipts(ctx context.Context, blockHash common.Hash) (types.Receipts, error) {
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return core.GetBlockReceipts(b.eth.chainDb, blockHash, core.GetBlockNumber(b.eth.chainDb, blockHash)), nil
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}
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func (b *EthApiBackend) 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 *EthApiBackend) GetVMEnv(ctx context.Context, msg core.Message, state ethapi.State, header *types.Header) (*vm.EVM, func() error, error) {
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statedb := state.(EthApiState).state
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from := statedb.GetOrNewStateObject(msg.From())
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from.SetBalance(common.MaxBig)
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vmError := func() error { return nil }
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context := core.NewEVMContext(msg, header, b.eth.BlockChain())
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return vm.NewEVM(context, statedb, b.eth.chainConfig, vm.Config{}), vmError, nil
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}
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func (b *EthApiBackend) SendTx(ctx context.Context, signedTx *types.Transaction) error {
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b.eth.txMu.Lock()
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defer b.eth.txMu.Unlock()
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b.eth.txPool.SetLocal(signedTx)
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return b.eth.txPool.Add(signedTx)
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}
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func (b *EthApiBackend) RemoveTx(txHash common.Hash) {
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b.eth.txMu.Lock()
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defer b.eth.txMu.Unlock()
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b.eth.txPool.Remove(txHash)
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}
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func (b *EthApiBackend) GetPoolTransactions() (types.Transactions, error) {
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b.eth.txMu.Lock()
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defer b.eth.txMu.Unlock()
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pending, err := b.eth.txPool.Pending()
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if err != nil {
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return nil, err
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}
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var txs types.Transactions
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for _, batch := range pending {
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txs = append(txs, batch...)
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}
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return txs, nil
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}
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func (b *EthApiBackend) GetPoolTransaction(hash common.Hash) *types.Transaction {
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b.eth.txMu.Lock()
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defer b.eth.txMu.Unlock()
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return b.eth.txPool.Get(hash)
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}
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func (b *EthApiBackend) GetPoolNonce(ctx context.Context, addr common.Address) (uint64, error) {
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b.eth.txMu.Lock()
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defer b.eth.txMu.Unlock()
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return b.eth.txPool.State().GetNonce(addr), nil
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}
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func (b *EthApiBackend) Stats() (pending int, queued int) {
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b.eth.txMu.Lock()
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defer b.eth.txMu.Unlock()
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return b.eth.txPool.Stats()
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}
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func (b *EthApiBackend) TxPoolContent() (map[common.Address]types.Transactions, map[common.Address]types.Transactions) {
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b.eth.txMu.Lock()
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defer b.eth.txMu.Unlock()
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return b.eth.TxPool().Content()
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}
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func (b *EthApiBackend) Downloader() *downloader.Downloader {
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return b.eth.Downloader()
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}
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func (b *EthApiBackend) ProtocolVersion() int {
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return b.eth.EthVersion()
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}
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func (b *EthApiBackend) SuggestPrice(ctx context.Context) (*big.Int, error) {
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return b.gpo.SuggestPrice(), nil
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}
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func (b *EthApiBackend) ChainDb() ethdb.Database {
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return b.eth.ChainDb()
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}
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func (b *EthApiBackend) EventMux() *event.TypeMux {
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return b.eth.EventMux()
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}
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func (b *EthApiBackend) AccountManager() *accounts.Manager {
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return b.eth.AccountManager()
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}
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type EthApiState struct {
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state *state.StateDB
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}
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func (s EthApiState) GetBalance(ctx context.Context, addr common.Address) (*big.Int, error) {
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return s.state.GetBalance(addr), nil
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}
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func (s EthApiState) GetCode(ctx context.Context, addr common.Address) ([]byte, error) {
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return s.state.GetCode(addr), nil
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}
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func (s EthApiState) GetState(ctx context.Context, a common.Address, b common.Hash) (common.Hash, error) {
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return s.state.GetState(a, b), nil
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}
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func (s EthApiState) GetNonce(ctx context.Context, addr common.Address) (uint64, error) {
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return s.state.GetNonce(addr), nil
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}
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