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authorZsolt Felfoldi <zsfelfoldi@gmail.com>2016-10-14 11:51:29 +0800
committerFelix Lange <fjl@twurst.com>2016-11-09 09:12:53 +0800
commit9f8d192991c4f68fa14c91366722bbca601da117 (patch)
tree5c1e089673d3f0208cd4a8208623bb95f29622c9 /les/api_backend.go
parent760fd65487614b7a61443cd9371015925795f40f (diff)
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les: light client protocol and API
Diffstat (limited to 'les/api_backend.go')
-rw-r--r--les/api_backend.go144
1 files changed, 144 insertions, 0 deletions
diff --git a/les/api_backend.go b/les/api_backend.go
new file mode 100644
index 000000000..d50b3ea33
--- /dev/null
+++ b/les/api_backend.go
@@ -0,0 +1,144 @@
+// 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 les
+
+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/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/light"
+ rpc "github.com/ethereum/go-ethereum/rpc"
+ "golang.org/x/net/context"
+)
+
+type LesApiBackend struct {
+ eth *LightEthereum
+ gpo *gasprice.LightPriceOracle
+}
+
+func (b *LesApiBackend) SetHead(number uint64) {
+ b.eth.blockchain.SetHead(number)
+}
+
+func (b *LesApiBackend) HeaderByNumber(ctx context.Context, blockNr rpc.BlockNumber) (*types.Header, error) {
+ if blockNr == rpc.LatestBlockNumber || blockNr == rpc.PendingBlockNumber {
+ return b.eth.blockchain.CurrentHeader(), nil
+ }
+
+ return b.eth.blockchain.GetHeaderByNumberOdr(ctx, uint64(blockNr))
+}
+
+func (b *LesApiBackend) BlockByNumber(ctx context.Context, blockNr rpc.BlockNumber) (*types.Block, error) {
+ header, err := b.HeaderByNumber(ctx, blockNr)
+ if header == nil || err != nil {
+ return nil, err
+ }
+ return b.GetBlock(ctx, header.Hash())
+}
+
+func (b *LesApiBackend) StateAndHeaderByNumber(ctx context.Context, blockNr rpc.BlockNumber) (ethapi.State, *types.Header, error) {
+ header, err := b.HeaderByNumber(ctx, blockNr)
+ if header == nil || err != nil {
+ return nil, nil, err
+ }
+ return light.NewLightState(light.StateTrieID(header), b.eth.odr), header, nil
+}
+
+func (b *LesApiBackend) GetBlock(ctx context.Context, blockHash common.Hash) (*types.Block, error) {
+ return b.eth.blockchain.GetBlockByHash(ctx, blockHash)
+}
+
+func (b *LesApiBackend) GetReceipts(ctx context.Context, blockHash common.Hash) (types.Receipts, error) {
+ return light.GetBlockReceipts(ctx, b.eth.odr, blockHash, core.GetBlockNumber(b.eth.chainDb, blockHash))
+}
+
+func (b *LesApiBackend) GetTd(blockHash common.Hash) *big.Int {
+ return b.eth.blockchain.GetTdByHash(blockHash)
+}
+
+func (b *LesApiBackend) GetVMEnv(ctx context.Context, msg core.Message, state ethapi.State, header *types.Header) (vm.Environment, func() error, error) {
+ stateDb := state.(*light.LightState).Copy()
+ addr, _ := msg.From()
+ from, err := stateDb.GetOrNewStateObject(ctx, addr)
+ if err != nil {
+ return nil, nil, err
+ }
+ from.SetBalance(common.MaxBig)
+ env := light.NewEnv(ctx, stateDb, b.eth.chainConfig, b.eth.blockchain, msg, header, b.eth.chainConfig.VmConfig)
+ return env, env.Error, nil
+}
+
+func (b *LesApiBackend) SendTx(ctx context.Context, signedTx *types.Transaction) error {
+ return b.eth.txPool.Add(ctx, signedTx)
+}
+
+func (b *LesApiBackend) RemoveTx(txHash common.Hash) {
+ b.eth.txPool.RemoveTx(txHash)
+}
+
+func (b *LesApiBackend) GetPoolTransactions() types.Transactions {
+ return b.eth.txPool.GetTransactions()
+}
+
+func (b *LesApiBackend) GetPoolTransaction(txHash common.Hash) *types.Transaction {
+ return b.eth.txPool.GetTransaction(txHash)
+}
+
+func (b *LesApiBackend) GetPoolNonce(ctx context.Context, addr common.Address) (uint64, error) {
+ return b.eth.txPool.GetNonce(ctx, addr)
+}
+
+func (b *LesApiBackend) Stats() (pending int, queued int) {
+ return b.eth.txPool.Stats(), 0
+}
+
+func (b *LesApiBackend) TxPoolContent() (map[common.Address]types.Transactions, map[common.Address]types.Transactions) {
+ return b.eth.txPool.Content()
+}
+
+func (b *LesApiBackend) Downloader() *downloader.Downloader {
+ return b.eth.Downloader()
+}
+
+func (b *LesApiBackend) ProtocolVersion() int {
+ return b.eth.LesVersion() + 10000
+}
+
+func (b *LesApiBackend) SuggestPrice(ctx context.Context) (*big.Int, error) {
+ return b.gpo.SuggestPrice(ctx)
+}
+
+func (b *LesApiBackend) ChainDb() ethdb.Database {
+ return b.eth.chainDb
+}
+
+func (b *LesApiBackend) EventMux() *event.TypeMux {
+ return b.eth.eventMux
+}
+
+func (b *LesApiBackend) AccountManager() *accounts.Manager {
+ return b.eth.accountManager
+}