/
api_backend.go
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/
api_backend.go
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// Copyright 2016 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 les
import (
"context"
"math/big"
"github.com/worldopennetwork/go-won/accounts"
"github.com/worldopennetwork/go-won/common"
"github.com/worldopennetwork/go-won/common/math"
"github.com/worldopennetwork/go-won/core"
"github.com/worldopennetwork/go-won/core/bloombits"
"github.com/worldopennetwork/go-won/core/state"
"github.com/worldopennetwork/go-won/core/types"
"github.com/worldopennetwork/go-won/core/vm"
"github.com/worldopennetwork/go-won/event"
"github.com/worldopennetwork/go-won/light"
"github.com/worldopennetwork/go-won/params"
"github.com/worldopennetwork/go-won/rpc"
"github.com/worldopennetwork/go-won/won/downloader"
"github.com/worldopennetwork/go-won/won/gasprice"
"github.com/worldopennetwork/go-won/wondb"
)
type LesApiBackend struct {
won *LightEthereum
gpo *gasprice.Oracle
}
func (b *LesApiBackend) ChainConfig() *params.ChainConfig {
return b.won.chainConfig
}
func (b *LesApiBackend) CurrentBlock() *types.Block {
return types.NewBlockWithHeader(b.won.BlockChain().CurrentHeader())
}
func (b *LesApiBackend) SetHead(number uint64) {
b.won.protocolManager.downloader.Cancel()
b.won.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.won.blockchain.CurrentHeader(), nil
}
return b.won.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) (*state.StateDB, *types.Header, error) {
header, err := b.HeaderByNumber(ctx, blockNr)
if header == nil || err != nil {
return nil, nil, err
}
return light.NewState(ctx, header, b.won.odr), header, nil
}
func (b *LesApiBackend) GetBlock(ctx context.Context, blockHash common.Hash) (*types.Block, error) {
return b.won.blockchain.GetBlockByHash(ctx, blockHash)
}
func (b *LesApiBackend) GetReceipts(ctx context.Context, blockHash common.Hash) (types.Receipts, error) {
return light.GetBlockReceipts(ctx, b.won.odr, blockHash, core.GetBlockNumber(b.won.chainDb, blockHash))
}
func (b *LesApiBackend) GetLogs(ctx context.Context, blockHash common.Hash) ([][]*types.Log, error) {
return light.GetBlockLogs(ctx, b.won.odr, blockHash, core.GetBlockNumber(b.won.chainDb, blockHash))
}
func (b *LesApiBackend) GetTd(blockHash common.Hash) *big.Int {
return b.won.blockchain.GetTdByHash(blockHash)
}
func (b *LesApiBackend) GetEVM(ctx context.Context, msg core.Message, state *state.StateDB, header *types.Header, vmCfg vm.Config) (*vm.EVM, func() error, error) {
state.SetBalance(msg.From(), math.MaxBig256)
context := core.NewEVMContext(msg, header, b.won.blockchain, nil)
return vm.NewEVM(context, state, b.won.chainConfig, vmCfg), state.Error, nil
}
func (b *LesApiBackend) SendTx(ctx context.Context, signedTx *types.Transaction) error {
return b.won.txPool.Add(ctx, signedTx)
}
func (b *LesApiBackend) RemoveTx(txHash common.Hash) {
b.won.txPool.RemoveTx(txHash)
}
func (b *LesApiBackend) GetPoolTransactions() (types.Transactions, error) {
return b.won.txPool.GetTransactions()
}
func (b *LesApiBackend) GetPoolTransaction(txHash common.Hash) *types.Transaction {
return b.won.txPool.GetTransaction(txHash)
}
func (b *LesApiBackend) GetPoolNonce(ctx context.Context, addr common.Address) (uint64, error) {
return b.won.txPool.GetNonce(ctx, addr)
}
func (b *LesApiBackend) Stats() (pending int, queued int) {
return b.won.txPool.Stats(), 0
}
func (b *LesApiBackend) TxPoolContent() (map[common.Address]types.Transactions, map[common.Address]types.Transactions) {
return b.won.txPool.Content()
}
func (b *LesApiBackend) SubscribeTxPreEvent(ch chan<- core.TxPreEvent) event.Subscription {
return b.won.txPool.SubscribeTxPreEvent(ch)
}
func (b *LesApiBackend) SubscribeChainEvent(ch chan<- core.ChainEvent) event.Subscription {
return b.won.blockchain.SubscribeChainEvent(ch)
}
func (b *LesApiBackend) SubscribeChainHeadEvent(ch chan<- core.ChainHeadEvent) event.Subscription {
return b.won.blockchain.SubscribeChainHeadEvent(ch)
}
func (b *LesApiBackend) SubscribeChainSideEvent(ch chan<- core.ChainSideEvent) event.Subscription {
return b.won.blockchain.SubscribeChainSideEvent(ch)
}
func (b *LesApiBackend) SubscribeLogsEvent(ch chan<- []*types.Log) event.Subscription {
return b.won.blockchain.SubscribeLogsEvent(ch)
}
func (b *LesApiBackend) SubscribeRemovedLogsEvent(ch chan<- core.RemovedLogsEvent) event.Subscription {
return b.won.blockchain.SubscribeRemovedLogsEvent(ch)
}
func (b *LesApiBackend) Downloader() *downloader.Downloader {
return b.won.Downloader()
}
func (b *LesApiBackend) ProtocolVersion() int {
return b.won.LesVersion() + 10000
}
func (b *LesApiBackend) SuggestPrice(ctx context.Context) (*big.Int, error) {
return b.gpo.SuggestPrice(ctx)
}
func (b *LesApiBackend) FixedPrice() *big.Int {
return b.gpo.FixedPrice()
}
func (b *LesApiBackend) ChainDb() wondb.Database {
return b.won.chainDb
}
func (b *LesApiBackend) EventMux() *event.TypeMux {
return b.won.eventMux
}
func (b *LesApiBackend) AccountManager() *accounts.Manager {
return b.won.accountManager
}
func (b *LesApiBackend) BloomStatus() (uint64, uint64) {
if b.won.bloomIndexer == nil {
return 0, 0
}
sections, _, _ := b.won.bloomIndexer.Sections()
return light.BloomTrieFrequency, sections
}
func (b *LesApiBackend) ServiceFilter(ctx context.Context, session *bloombits.MatcherSession) {
for i := 0; i < bloomFilterThreads; i++ {
go session.Multiplex(bloomRetrievalBatch, bloomRetrievalWait, b.won.bloomRequests)
}
}