• Jeffrey Wilcke's avatar
    params: core, core/vm, miner: 64bit gas instructions · c12f4df9
    Jeffrey Wilcke authored
    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
    c12f4df9
backend.go 4.2 KB
// 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 ethapi implements the general Ethereum API functions.
package ethapi

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/ethdb"
	"github.com/ethereum/go-ethereum/event"
	"github.com/ethereum/go-ethereum/params"
	"github.com/ethereum/go-ethereum/rpc"
	"golang.org/x/net/context"
)

// Backend interface provides the common API services (that are provided by
// both full and light clients) with access to necessary functions.
type Backend interface {
	// general Ethereum API
	Downloader() *downloader.Downloader
	ProtocolVersion() int
	SuggestPrice(ctx context.Context) (*big.Int, error)
	ChainDb() ethdb.Database
	EventMux() *event.TypeMux
	AccountManager() *accounts.Manager
	// BlockChain API
	SetHead(number uint64)
	HeaderByNumber(ctx context.Context, blockNr rpc.BlockNumber) (*types.Header, error)
	BlockByNumber(ctx context.Context, blockNr rpc.BlockNumber) (*types.Block, error)
	StateAndHeaderByNumber(ctx context.Context, blockNr rpc.BlockNumber) (State, *types.Header, error)
	GetBlock(ctx context.Context, blockHash common.Hash) (*types.Block, error)
	GetReceipts(ctx context.Context, blockHash common.Hash) (types.Receipts, error)
	GetTd(blockHash common.Hash) *big.Int
	GetEVM(ctx context.Context, msg core.Message, state State, header *types.Header, vmCfg vm.Config) (*vm.EVM, func() error, error)
	// TxPool API
	SendTx(ctx context.Context, signedTx *types.Transaction) error
	RemoveTx(txHash common.Hash)
	GetPoolTransactions() (types.Transactions, error)
	GetPoolTransaction(txHash common.Hash) *types.Transaction
	GetPoolNonce(ctx context.Context, addr common.Address) (uint64, error)
	Stats() (pending int, queued int)
	TxPoolContent() (map[common.Address]types.Transactions, map[common.Address]types.Transactions)

	ChainConfig() *params.ChainConfig
	CurrentBlock() *types.Block
}

type State interface {
	GetBalance(ctx context.Context, addr common.Address) (*big.Int, error)
	GetCode(ctx context.Context, addr common.Address) ([]byte, error)
	GetState(ctx context.Context, a common.Address, b common.Hash) (common.Hash, error)
	GetNonce(ctx context.Context, addr common.Address) (uint64, error)
}

func GetAPIs(apiBackend Backend, solcPath string) []rpc.API {
	compiler := makeCompilerAPIs(solcPath)
	all := []rpc.API{
		{
			Namespace: "eth",
			Version:   "1.0",
			Service:   NewPublicEthereumAPI(apiBackend),
			Public:    true,
		}, {
			Namespace: "eth",
			Version:   "1.0",
			Service:   NewPublicBlockChainAPI(apiBackend),
			Public:    true,
		}, {
			Namespace: "eth",
			Version:   "1.0",
			Service:   NewPublicTransactionPoolAPI(apiBackend),
			Public:    true,
		}, {
			Namespace: "txpool",
			Version:   "1.0",
			Service:   NewPublicTxPoolAPI(apiBackend),
			Public:    true,
		}, {
			Namespace: "debug",
			Version:   "1.0",
			Service:   NewPublicDebugAPI(apiBackend),
			Public:    true,
		}, {
			Namespace: "debug",
			Version:   "1.0",
			Service:   NewPrivateDebugAPI(apiBackend),
		}, {
			Namespace: "eth",
			Version:   "1.0",
			Service:   NewPublicAccountAPI(apiBackend.AccountManager()),
			Public:    true,
		}, {
			Namespace: "personal",
			Version:   "1.0",
			Service:   NewPrivateAccountAPI(apiBackend),
			Public:    false,
		},
	}
	return append(compiler, all...)
}