github.com/4000d/go-ethereum@v1.8.2-0.20180223170251-423c8bb1d821/les/api_backend.go (about)

     1  // Copyright 2016 The go-ethereum Authors
     2  // This file is part of the go-ethereum library.
     3  //
     4  // The go-ethereum library is free software: you can redistribute it and/or modify
     5  // it under the terms of the GNU Lesser General Public License as published by
     6  // the Free Software Foundation, either version 3 of the License, or
     7  // (at your option) any later version.
     8  //
     9  // The go-ethereum library is distributed in the hope that it will be useful,
    10  // but WITHOUT ANY WARRANTY; without even the implied warranty of
    11  // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
    12  // GNU Lesser General Public License for more details.
    13  //
    14  // You should have received a copy of the GNU Lesser General Public License
    15  // along with the go-ethereum library. If not, see <http://www.gnu.org/licenses/>.
    16  
    17  package les
    18  
    19  import (
    20  	"context"
    21  	"math/big"
    22  
    23  	"github.com/ethereum/go-ethereum/accounts"
    24  	"github.com/ethereum/go-ethereum/common"
    25  	"github.com/ethereum/go-ethereum/common/math"
    26  	"github.com/ethereum/go-ethereum/core"
    27  	"github.com/ethereum/go-ethereum/core/bloombits"
    28  	"github.com/ethereum/go-ethereum/core/state"
    29  	"github.com/ethereum/go-ethereum/core/types"
    30  	"github.com/ethereum/go-ethereum/core/vm"
    31  	"github.com/ethereum/go-ethereum/eth/downloader"
    32  	"github.com/ethereum/go-ethereum/eth/gasprice"
    33  	"github.com/ethereum/go-ethereum/ethdb"
    34  	"github.com/ethereum/go-ethereum/event"
    35  	"github.com/ethereum/go-ethereum/light"
    36  	"github.com/ethereum/go-ethereum/params"
    37  	"github.com/ethereum/go-ethereum/rpc"
    38  )
    39  
    40  type LesApiBackend struct {
    41  	eth *LightEthereum
    42  	gpo *gasprice.Oracle
    43  }
    44  
    45  func (b *LesApiBackend) ChainConfig() *params.ChainConfig {
    46  	return b.eth.chainConfig
    47  }
    48  
    49  func (b *LesApiBackend) CurrentBlock() *types.Block {
    50  	return types.NewBlockWithHeader(b.eth.BlockChain().CurrentHeader())
    51  }
    52  
    53  func (b *LesApiBackend) SetHead(number uint64) {
    54  	b.eth.protocolManager.downloader.Cancel()
    55  	b.eth.blockchain.SetHead(number)
    56  }
    57  
    58  func (b *LesApiBackend) HeaderByNumber(ctx context.Context, blockNr rpc.BlockNumber) (*types.Header, error) {
    59  	if blockNr == rpc.LatestBlockNumber || blockNr == rpc.PendingBlockNumber {
    60  		return b.eth.blockchain.CurrentHeader(), nil
    61  	}
    62  
    63  	return b.eth.blockchain.GetHeaderByNumberOdr(ctx, uint64(blockNr))
    64  }
    65  
    66  func (b *LesApiBackend) BlockByNumber(ctx context.Context, blockNr rpc.BlockNumber) (*types.Block, error) {
    67  	header, err := b.HeaderByNumber(ctx, blockNr)
    68  	if header == nil || err != nil {
    69  		return nil, err
    70  	}
    71  	return b.GetBlock(ctx, header.Hash())
    72  }
    73  
    74  func (b *LesApiBackend) StateAndHeaderByNumber(ctx context.Context, blockNr rpc.BlockNumber) (*state.StateDB, *types.Header, error) {
    75  	header, err := b.HeaderByNumber(ctx, blockNr)
    76  	if header == nil || err != nil {
    77  		return nil, nil, err
    78  	}
    79  	return light.NewState(ctx, header, b.eth.odr), header, nil
    80  }
    81  
    82  func (b *LesApiBackend) GetBlock(ctx context.Context, blockHash common.Hash) (*types.Block, error) {
    83  	return b.eth.blockchain.GetBlockByHash(ctx, blockHash)
    84  }
    85  
    86  func (b *LesApiBackend) GetReceipts(ctx context.Context, blockHash common.Hash) (types.Receipts, error) {
    87  	return light.GetBlockReceipts(ctx, b.eth.odr, blockHash, core.GetBlockNumber(b.eth.chainDb, blockHash))
    88  }
    89  
    90  func (b *LesApiBackend) GetLogs(ctx context.Context, blockHash common.Hash) ([][]*types.Log, error) {
    91  	return light.GetBlockLogs(ctx, b.eth.odr, blockHash, core.GetBlockNumber(b.eth.chainDb, blockHash))
    92  }
    93  
    94  func (b *LesApiBackend) GetTd(blockHash common.Hash) *big.Int {
    95  	return b.eth.blockchain.GetTdByHash(blockHash)
    96  }
    97  
    98  func (b *LesApiBackend) GetEVM(ctx context.Context, msg core.Message, state *state.StateDB, header *types.Header, vmCfg vm.Config) (*vm.EVM, func() error, error) {
    99  	state.SetBalance(msg.From(), math.MaxBig256)
   100  	context := core.NewEVMContext(msg, header, b.eth.blockchain, nil)
   101  	return vm.NewEVM(context, state, b.eth.chainConfig, vmCfg), state.Error, nil
   102  }
   103  
   104  func (b *LesApiBackend) SendTx(ctx context.Context, signedTx *types.Transaction) error {
   105  	return b.eth.txPool.Add(ctx, signedTx)
   106  }
   107  
   108  func (b *LesApiBackend) RemoveTx(txHash common.Hash) {
   109  	b.eth.txPool.RemoveTx(txHash)
   110  }
   111  
   112  func (b *LesApiBackend) GetPoolTransactions() (types.Transactions, error) {
   113  	return b.eth.txPool.GetTransactions()
   114  }
   115  
   116  func (b *LesApiBackend) GetPoolTransaction(txHash common.Hash) *types.Transaction {
   117  	return b.eth.txPool.GetTransaction(txHash)
   118  }
   119  
   120  func (b *LesApiBackend) GetPoolNonce(ctx context.Context, addr common.Address) (uint64, error) {
   121  	return b.eth.txPool.GetNonce(ctx, addr)
   122  }
   123  
   124  func (b *LesApiBackend) Stats() (pending int, queued int) {
   125  	return b.eth.txPool.Stats(), 0
   126  }
   127  
   128  func (b *LesApiBackend) TxPoolContent() (map[common.Address]types.Transactions, map[common.Address]types.Transactions) {
   129  	return b.eth.txPool.Content()
   130  }
   131  
   132  func (b *LesApiBackend) SubscribeTxPreEvent(ch chan<- core.TxPreEvent) event.Subscription {
   133  	return b.eth.txPool.SubscribeTxPreEvent(ch)
   134  }
   135  
   136  func (b *LesApiBackend) SubscribeChainEvent(ch chan<- core.ChainEvent) event.Subscription {
   137  	return b.eth.blockchain.SubscribeChainEvent(ch)
   138  }
   139  
   140  func (b *LesApiBackend) SubscribeChainHeadEvent(ch chan<- core.ChainHeadEvent) event.Subscription {
   141  	return b.eth.blockchain.SubscribeChainHeadEvent(ch)
   142  }
   143  
   144  func (b *LesApiBackend) SubscribeChainSideEvent(ch chan<- core.ChainSideEvent) event.Subscription {
   145  	return b.eth.blockchain.SubscribeChainSideEvent(ch)
   146  }
   147  
   148  func (b *LesApiBackend) SubscribeLogsEvent(ch chan<- []*types.Log) event.Subscription {
   149  	return b.eth.blockchain.SubscribeLogsEvent(ch)
   150  }
   151  
   152  func (b *LesApiBackend) SubscribeRemovedLogsEvent(ch chan<- core.RemovedLogsEvent) event.Subscription {
   153  	return b.eth.blockchain.SubscribeRemovedLogsEvent(ch)
   154  }
   155  
   156  func (b *LesApiBackend) Downloader() *downloader.Downloader {
   157  	return b.eth.Downloader()
   158  }
   159  
   160  func (b *LesApiBackend) ProtocolVersion() int {
   161  	return b.eth.LesVersion() + 10000
   162  }
   163  
   164  func (b *LesApiBackend) SuggestPrice(ctx context.Context) (*big.Int, error) {
   165  	return b.gpo.SuggestPrice(ctx)
   166  }
   167  
   168  func (b *LesApiBackend) ChainDb() ethdb.Database {
   169  	return b.eth.chainDb
   170  }
   171  
   172  func (b *LesApiBackend) EventMux() *event.TypeMux {
   173  	return b.eth.eventMux
   174  }
   175  
   176  func (b *LesApiBackend) AccountManager() *accounts.Manager {
   177  	return b.eth.accountManager
   178  }
   179  
   180  func (b *LesApiBackend) BloomStatus() (uint64, uint64) {
   181  	if b.eth.bloomIndexer == nil {
   182  		return 0, 0
   183  	}
   184  	sections, _, _ := b.eth.bloomIndexer.Sections()
   185  	return light.BloomTrieFrequency, sections
   186  }
   187  
   188  func (b *LesApiBackend) ServiceFilter(ctx context.Context, session *bloombits.MatcherSession) {
   189  	for i := 0; i < bloomFilterThreads; i++ {
   190  		go session.Multiplex(bloomRetrievalBatch, bloomRetrievalWait, b.eth.bloomRequests)
   191  	}
   192  }