erigon-pulse/eth/api_backend.go
Jeffrey Wilcke c12f4df910 params: core, core/vm, miner: 64bit gas instructions
Reworked the EVM gas instructions to use 64bit integers rather than
arbitrary size big ints. All gas operations, be it additions,
multiplications or divisions, are checked and guarded against 64 bit
integer overflows.

In additon, most of the protocol paramaters in the params package have
been converted to uint64 and are now constants rather than variables.

* common/math: added overflow check ops
* core: vmenv, env renamed to evm
* eth, internal/ethapi, les: unmetered eth_call and cancel methods
* core/vm: implemented big.Int pool for evm instructions
* core/vm: unexported intPool methods & verification methods
* core/vm: added memoryGasCost overflow check and test
2017-02-13 21:44:25 +01:00

221 lines
6.6 KiB
Go

// 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 (
"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/state"
"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/params"
"github.com/ethereum/go-ethereum/rpc"
"golang.org/x/net/context"
)
// EthApiBackend implements ethapi.Backend for full nodes
type EthApiBackend struct {
eth *Ethereum
gpo *gasprice.GasPriceOracle
}
func (b *EthApiBackend) ChainConfig() *params.ChainConfig {
return b.eth.chainConfig
}
func (b *EthApiBackend) CurrentBlock() *types.Block {
return b.eth.blockchain.CurrentBlock()
}
func (b *EthApiBackend) SetHead(number uint64) {
b.eth.blockchain.SetHead(number)
}
func (b *EthApiBackend) HeaderByNumber(ctx context.Context, blockNr rpc.BlockNumber) (*types.Header, error) {
// Pending block is only known by the miner
if blockNr == rpc.PendingBlockNumber {
block := b.eth.miner.PendingBlock()
return block.Header(), nil
}
// Otherwise resolve and return the block
if blockNr == rpc.LatestBlockNumber {
return b.eth.blockchain.CurrentBlock().Header(), nil
}
return b.eth.blockchain.GetHeaderByNumber(uint64(blockNr)), nil
}
func (b *EthApiBackend) BlockByNumber(ctx context.Context, blockNr rpc.BlockNumber) (*types.Block, error) {
// Pending block is only known by the miner
if blockNr == rpc.PendingBlockNumber {
block := b.eth.miner.PendingBlock()
return block, nil
}
// Otherwise resolve and return the block
if blockNr == rpc.LatestBlockNumber {
return b.eth.blockchain.CurrentBlock(), nil
}
return b.eth.blockchain.GetBlockByNumber(uint64(blockNr)), nil
}
func (b *EthApiBackend) StateAndHeaderByNumber(ctx context.Context, blockNr rpc.BlockNumber) (ethapi.State, *types.Header, error) {
// Pending state is only known by the miner
if blockNr == rpc.PendingBlockNumber {
block, state := b.eth.miner.Pending()
return EthApiState{state}, block.Header(), nil
}
// Otherwise resolve the block number and return its state
header, err := b.HeaderByNumber(ctx, blockNr)
if header == nil || err != nil {
return nil, nil, err
}
stateDb, err := b.eth.BlockChain().StateAt(header.Root)
return EthApiState{stateDb}, header, err
}
func (b *EthApiBackend) GetBlock(ctx context.Context, blockHash common.Hash) (*types.Block, error) {
return b.eth.blockchain.GetBlockByHash(blockHash), nil
}
func (b *EthApiBackend) GetReceipts(ctx context.Context, blockHash common.Hash) (types.Receipts, error) {
return core.GetBlockReceipts(b.eth.chainDb, blockHash, core.GetBlockNumber(b.eth.chainDb, blockHash)), nil
}
func (b *EthApiBackend) GetTd(blockHash common.Hash) *big.Int {
return b.eth.blockchain.GetTdByHash(blockHash)
}
func (b *EthApiBackend) GetEVM(ctx context.Context, msg core.Message, state ethapi.State, header *types.Header, vmCfg vm.Config) (*vm.EVM, func() error, error) {
statedb := state.(EthApiState).state
from := statedb.GetOrNewStateObject(msg.From())
from.SetBalance(common.MaxBig)
vmError := func() error { return nil }
context := core.NewEVMContext(msg, header, b.eth.BlockChain())
return vm.NewEVM(context, statedb, b.eth.chainConfig, vmCfg), vmError, nil
}
func (b *EthApiBackend) SendTx(ctx context.Context, signedTx *types.Transaction) error {
b.eth.txMu.Lock()
defer b.eth.txMu.Unlock()
b.eth.txPool.SetLocal(signedTx)
return b.eth.txPool.Add(signedTx)
}
func (b *EthApiBackend) RemoveTx(txHash common.Hash) {
b.eth.txMu.Lock()
defer b.eth.txMu.Unlock()
b.eth.txPool.Remove(txHash)
}
func (b *EthApiBackend) GetPoolTransactions() (types.Transactions, error) {
b.eth.txMu.Lock()
defer b.eth.txMu.Unlock()
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 {
b.eth.txMu.Lock()
defer b.eth.txMu.Unlock()
return b.eth.txPool.Get(hash)
}
func (b *EthApiBackend) GetPoolNonce(ctx context.Context, addr common.Address) (uint64, error) {
b.eth.txMu.Lock()
defer b.eth.txMu.Unlock()
return b.eth.txPool.State().GetNonce(addr), nil
}
func (b *EthApiBackend) Stats() (pending int, queued int) {
b.eth.txMu.Lock()
defer b.eth.txMu.Unlock()
return b.eth.txPool.Stats()
}
func (b *EthApiBackend) TxPoolContent() (map[common.Address]types.Transactions, map[common.Address]types.Transactions) {
b.eth.txMu.Lock()
defer b.eth.txMu.Unlock()
return b.eth.TxPool().Content()
}
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(), nil
}
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()
}
type EthApiState struct {
state *state.StateDB
}
func (s EthApiState) GetBalance(ctx context.Context, addr common.Address) (*big.Int, error) {
return s.state.GetBalance(addr), nil
}
func (s EthApiState) GetCode(ctx context.Context, addr common.Address) ([]byte, error) {
return s.state.GetCode(addr), nil
}
func (s EthApiState) GetState(ctx context.Context, a common.Address, b common.Hash) (common.Hash, error) {
return s.state.GetState(a, b), nil
}
func (s EthApiState) GetNonce(ctx context.Context, addr common.Address) (uint64, error) {
return s.state.GetNonce(addr), nil
}