aboutsummaryrefslogblamecommitdiffstats
path: root/eth/api_backend.go
blob: ecd5488a24513d774b2a7b38ad71f963fe01a6e0 (plain) (tree)
1
2
3
4
5
6
7
8
9
                                         
                                                
  

                                                                                  


                                                                    
                                                                             

                                                                 
                                                      
  

                                                                                  



           
                 



                                                  
                                                     
                                              
                                                        






                                                        
                                                
                                             



                                                         
                     
                            

 







                                                           
                                                
                                                 


                                        
                                                                                                             

                                                   
                                                   
                                          


                                                 
                                                                    
         
                                                                       




                                                                                                           
                                                   








                                                                      
                                                                                                                                     


                                                     
                                                 

                                                                  


                                                     
         
                                                               
                                   









                                                                                                                  











                                                                                                                  



                                                               

                                                                                                                                                                   
                                              
 
                                                                           
                                                                                

 



















                                                                                                       
                                                                                        
                                              

 
                                                                           



                                              
                                  
                                       

                                           
                       

 
                                                                                 
                                     


                                                                                                



                                                           


                                   
                                                                                                                        


                                       



                                                                                           








                                                                             
                                      












                                                            
 


                                                        

 


                                                                                                  

         
// 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 eth

import (
    "context"
    "math/big"

    "github.com/ethereum/go-ethereum/accounts"
    "github.com/ethereum/go-ethereum/common"
    "github.com/ethereum/go-ethereum/common/math"
    "github.com/ethereum/go-ethereum/core"
    "github.com/ethereum/go-ethereum/core/bloombits"
    "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/params"
    "github.com/ethereum/go-ethereum/rpc"
)

// EthApiBackend implements ethapi.Backend for full nodes
type EthApiBackend struct {
    eth *Ethereum
    gpo *gasprice.Oracle
}

func (b *EthApiBackend) ChainConfig() *params.ChainConfig {
    return b.eth.chainConfig
}

func (b *EthApiBackend) CurrentBlock() *types.Block {
    return b.eth.blockchain.CurrentBlock()
}

func (b *EthApiBackend) SetHead(number uint64) {
    b.eth.protocolManager.downloader.Cancel()
    b.eth.blockchain.SetHead(number)
}

func (b *EthApiBackend) HeaderByNumber(ctx context.Context, blockNr rpc.BlockNumber) (*types.Header, error) {
    // Pending block is only known by the miner
    if blockNr == rpc.PendingBlockNumber {
        block := b.eth.miner.PendingBlock()
        return block.Header(), nil
    }
    // Otherwise resolve and return the block
    if blockNr == rpc.LatestBlockNumber {
        return b.eth.blockchain.CurrentBlock().Header(), nil
    }
    return b.eth.blockchain.GetHeaderByNumber(uint64(blockNr)), nil
}

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.PendingBlock()
        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(ctx context.Context, blockNr rpc.BlockNumber) (*state.StateDB, *types.Header, error) {
    // Pending state is only known by the miner
    if blockNr == rpc.PendingBlockNumber {
        block, state := b.eth.miner.Pending()
        return state, block.Header(), nil
    }
    // Otherwise resolve the block number and return its state
    header, err := b.HeaderByNumber(ctx, blockNr)
    if header == nil || err != nil {
        return nil, nil, err
    }
    stateDb, err := b.eth.BlockChain().StateAt(header.Root)
    return 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) GetLogs(ctx context.Context, blockHash common.Hash) ([][]*types.Log, error) {
    receipts := core.GetBlockReceipts(b.eth.chainDb, blockHash, core.GetBlockNumber(b.eth.chainDb, blockHash))
    if receipts == nil {
        return nil, nil
    }
    logs := make([][]*types.Log, len(receipts))
    for i, receipt := range receipts {
        logs[i] = receipt.Logs
    }
    return logs, nil
}

func (b *EthApiBackend) GetTd(blockHash common.Hash) *big.Int {
    return b.eth.blockchain.GetTdByHash(blockHash)
}

func (b *EthApiBackend) 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)
    vmError := func() error { return nil }

    context := core.NewEVMContext(msg, header, b.eth.BlockChain(), nil)
    return vm.NewEVM(context, state, b.eth.chainConfig, vmCfg), vmError, nil
}

func (b *EthApiBackend) SubscribeRemovedLogsEvent(ch chan<- core.RemovedLogsEvent) event.Subscription {
    return b.eth.BlockChain().SubscribeRemovedLogsEvent(ch)
}

func (b *EthApiBackend) SubscribeChainEvent(ch chan<- core.ChainEvent) event.Subscription {
    return b.eth.BlockChain().SubscribeChainEvent(ch)
}

func (b *EthApiBackend) SubscribeChainHeadEvent(ch chan<- core.ChainHeadEvent) event.Subscription {
    return b.eth.BlockChain().SubscribeChainHeadEvent(ch)
}

func (b *EthApiBackend) SubscribeChainSideEvent(ch chan<- core.ChainSideEvent) event.Subscription {
    return b.eth.BlockChain().SubscribeChainSideEvent(ch)
}

func (b *EthApiBackend) SubscribeLogsEvent(ch chan<- []*types.Log) event.Subscription {
    return b.eth.BlockChain().SubscribeLogsEvent(ch)
}

func (b *EthApiBackend) SendTx(ctx context.Context, signedTx *types.Transaction) error {
    return b.eth.txPool.AddLocal(signedTx)
}

func (b *EthApiBackend) GetPoolTransactions() (types.Transactions, error) {
    pending, err := b.eth.txPool.Pending()
    if err != nil {
        return nil, err
    }
    var txs types.Transactions
    for _, batch := range pending {
        txs = append(txs, batch...)
    }
    return txs, nil
}

func (b *EthApiBackend) GetPoolTransaction(hash common.Hash) *types.Transaction {
    return b.eth.txPool.Get(hash)
}

func (b *EthApiBackend) GetPoolNonce(ctx context.Context, addr common.Address) (uint64, error) {
    return b.eth.txPool.State().GetNonce(addr), nil
}

func (b *EthApiBackend) Stats() (pending int, queued int) {
    return b.eth.txPool.Stats()
}

func (b *EthApiBackend) TxPoolContent() (map[common.Address]types.Transactions, map[common.Address]types.Transactions) {
    return b.eth.TxPool().Content()
}

func (b *EthApiBackend) SubscribeTxPreEvent(ch chan<- core.TxPreEvent) event.Subscription {
    return b.eth.TxPool().SubscribeTxPreEvent(ch)
}

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(ctx)
}

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()
}

func (b *EthApiBackend) BloomStatus() (uint64, uint64) {
    sections, _, _ := b.eth.bloomIndexer.Sections()
    return params.BloomBitsBlocks, sections
}

func (b *EthApiBackend) ServiceFilter(ctx context.Context, session *bloombits.MatcherSession) {
    for i := 0; i < bloomFilterThreads; i++ {
        go session.Multiplex(bloomRetrievalBatch, bloomRetrievalWait, b.eth.bloomRequests)
    }
}