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author | zsfelfoldi <zsfelfoldi@gmail.com> | 2015-12-16 11:26:23 +0800 |
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committer | zsfelfoldi <zsfelfoldi@gmail.com> | 2016-06-16 23:36:38 +0800 |
commit | 3a97280ae889bb6852ba16e70750a37b2ed08473 (patch) | |
tree | 41e078895ddd76fe81b323539046b7d9df8b17b3 /eth/api_backend.go | |
parent | a38be3eb488a349693a9c9905ab015278281f8db (diff) | |
download | dexon-3a97280ae889bb6852ba16e70750a37b2ed08473.tar.gz dexon-3a97280ae889bb6852ba16e70750a37b2ed08473.tar.zst dexon-3a97280ae889bb6852ba16e70750a37b2ed08473.zip |
eth: separate common and full node-specific API and backend service
Diffstat (limited to 'eth/api_backend.go')
-rw-r--r-- | eth/api_backend.go | 201 |
1 files changed, 201 insertions, 0 deletions
diff --git a/eth/api_backend.go b/eth/api_backend.go new file mode 100644 index 000000000..9dbebb226 --- /dev/null +++ b/eth/api_backend.go @@ -0,0 +1,201 @@ +// Copyright 2015 The go-ethereum Authors +// This file is part of go-ethereum. +// +// go-ethereum is free software: you can redistribute it and/or modify +// it under the terms of the GNU General Public License as published by +// the Free Software Foundation, either version 3 of the License, or +// (at your option) any later version. +// +// go-ethereum 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 General Public License for more details. +// +// You should have received a copy of the GNU General Public License +// along with go-ethereum. 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" + rpc "github.com/ethereum/go-ethereum/rpc" + "golang.org/x/net/context" +) + +// EthApiBackend implements ethapi.Backend for full nodes +type EthApiBackend struct { + eth *FullNodeService + gpo *gasprice.GasPriceOracle +} + +func (b *EthApiBackend) SetHead(number uint64) { + b.eth.blockchain.SetHead(number) +} + +func (b *EthApiBackend) HeaderByNumber(blockNr rpc.BlockNumber) *types.Header { + // Pending block is only known by the miner + if blockNr == rpc.PendingBlockNumber { + block, _ := b.eth.miner.Pending() + return block.Header() + } + // Otherwise resolve and return the block + if blockNr == rpc.LatestBlockNumber { + return b.eth.blockchain.CurrentBlock().Header() + } + return b.eth.blockchain.GetHeaderByNumber(uint64(blockNr)) +} + +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.Pending() + 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(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 := b.HeaderByNumber(blockNr) + if header == nil { + return nil, nil, nil + } + stateDb, err := state.New(header.Root, b.eth.chainDb) + 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) GetVMEnv(ctx context.Context, msg core.Message, state ethapi.State, header *types.Header) (vm.Environment, func() error, error) { + stateDb := state.(EthApiState).state.Copy() + addr, _ := msg.From() + from := stateDb.GetOrNewStateObject(addr) + from.SetBalance(common.MaxBig) + vmError := func() error { return nil } + return core.NewEnv(stateDb, b.eth.chainConfig, b.eth.blockchain, msg, header, b.eth.chainConfig.VmConfig), 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.RemoveTx(txHash) +} + +func (b *EthApiBackend) GetPoolTransactions() types.Transactions { + b.eth.txMu.Lock() + defer b.eth.txMu.Unlock() + + return b.eth.txPool.GetTransactions() +} + +func (b *EthApiBackend) GetPoolTransaction(txHash common.Hash) *types.Transaction { + b.eth.txMu.Lock() + defer b.eth.txMu.Unlock() + + return b.eth.txPool.GetTransaction(txHash) +} + +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]map[uint64][]*types.Transaction, map[common.Address]map[uint64][]*types.Transaction) { + 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 +} |