github.com/FUSIONFoundation/efsn@v3.6.2-0.20200916075423-dbb5dd5d2cc7+incompatible/eth/api_backend.go (about)

     1  // Copyright 2015 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 eth
    18  
    19  import (
    20  	"context"
    21  	"math/big"
    22  
    23  	"github.com/FusionFoundation/efsn/accounts"
    24  	"github.com/FusionFoundation/efsn/common"
    25  	"github.com/FusionFoundation/efsn/common/math"
    26  	"github.com/FusionFoundation/efsn/core"
    27  	"github.com/FusionFoundation/efsn/core/bloombits"
    28  	"github.com/FusionFoundation/efsn/core/rawdb"
    29  	"github.com/FusionFoundation/efsn/core/state"
    30  	"github.com/FusionFoundation/efsn/core/types"
    31  	"github.com/FusionFoundation/efsn/core/vm"
    32  	"github.com/FusionFoundation/efsn/eth/downloader"
    33  	"github.com/FusionFoundation/efsn/eth/gasprice"
    34  	"github.com/FusionFoundation/efsn/ethdb"
    35  	"github.com/FusionFoundation/efsn/event"
    36  	"github.com/FusionFoundation/efsn/params"
    37  	"github.com/FusionFoundation/efsn/rpc"
    38  )
    39  
    40  // EthAPIBackend implements ethapi.Backend for full nodes
    41  type EthAPIBackend struct {
    42  	eth *Ethereum
    43  	gpo *gasprice.Oracle
    44  }
    45  
    46  // ChainConfig returns the active chain configuration.
    47  func (b *EthAPIBackend) ChainConfig() *params.ChainConfig {
    48  	return b.eth.chainConfig
    49  }
    50  
    51  func (b *EthAPIBackend) CurrentBlock() *types.Block {
    52  	return b.eth.blockchain.CurrentBlock()
    53  }
    54  
    55  func (b *EthAPIBackend) SetHead(number uint64) {
    56  	b.eth.protocolManager.downloader.Cancel()
    57  	b.eth.blockchain.SetHead(number)
    58  }
    59  
    60  func (b *EthAPIBackend) HeaderByNumber(ctx context.Context, blockNr rpc.BlockNumber) (*types.Header, error) {
    61  	// Pending block is only known by the miner
    62  	if blockNr == rpc.PendingBlockNumber {
    63  		block := b.eth.miner.PendingBlock()
    64  		return block.Header(), nil
    65  	}
    66  	// Otherwise resolve and return the block
    67  	if blockNr == rpc.LatestBlockNumber {
    68  		return b.eth.blockchain.CurrentBlock().Header(), nil
    69  	}
    70  	return b.eth.blockchain.GetHeaderByNumber(uint64(blockNr)), nil
    71  }
    72  
    73  func (b *EthAPIBackend) HeaderByHash(ctx context.Context, hash common.Hash) (*types.Header, error) {
    74  	return b.eth.blockchain.GetHeaderByHash(hash), nil
    75  }
    76  
    77  func (b *EthAPIBackend) BlockByNumber(ctx context.Context, blockNr rpc.BlockNumber) (*types.Block, error) {
    78  	// Pending block is only known by the miner
    79  	if blockNr == rpc.PendingBlockNumber {
    80  		block := b.eth.miner.PendingBlock()
    81  		if block != nil {
    82  			return block, nil
    83  		}
    84  		return b.eth.blockchain.CurrentBlock(), nil
    85  	}
    86  	// Otherwise resolve and return the block
    87  	if blockNr == rpc.LatestBlockNumber {
    88  		return b.eth.blockchain.CurrentBlock(), nil
    89  	}
    90  	return b.eth.blockchain.GetBlockByNumber(uint64(blockNr)), nil
    91  }
    92  
    93  func (b *EthAPIBackend) StateAndHeaderByNumber(ctx context.Context, blockNr rpc.BlockNumber) (*state.StateDB, *types.Header, error) {
    94  	// Pending state is only known by the miner
    95  	if blockNr == rpc.PendingBlockNumber {
    96  		block, state := b.eth.miner.Pending()
    97  		return state, block.Header(), nil
    98  	}
    99  	// Otherwise resolve the block number and return its state
   100  	header, err := b.HeaderByNumber(ctx, blockNr)
   101  	if header == nil || err != nil {
   102  		return nil, nil, err
   103  	}
   104  	stateDb, err := b.eth.BlockChain().StateAt(header.Root, header.MixDigest)
   105  	return stateDb, header, err
   106  }
   107  
   108  func (b *EthAPIBackend) GetBlock(ctx context.Context, hash common.Hash) (*types.Block, error) {
   109  	return b.eth.blockchain.GetBlockByHash(hash), nil
   110  }
   111  
   112  func (b *EthAPIBackend) GetReceipts(ctx context.Context, hash common.Hash) (types.Receipts, error) {
   113  	if number := rawdb.ReadHeaderNumber(b.eth.chainDb, hash); number != nil {
   114  		return rawdb.ReadReceipts(b.eth.chainDb, hash, *number), nil
   115  	}
   116  	return nil, nil
   117  }
   118  
   119  func (b *EthAPIBackend) GetLogs(ctx context.Context, hash common.Hash) ([][]*types.Log, error) {
   120  	number := rawdb.ReadHeaderNumber(b.eth.chainDb, hash)
   121  	if number == nil {
   122  		return nil, nil
   123  	}
   124  	receipts := rawdb.ReadReceipts(b.eth.chainDb, hash, *number)
   125  	if receipts == nil {
   126  		return nil, nil
   127  	}
   128  	logs := make([][]*types.Log, len(receipts))
   129  	for i, receipt := range receipts {
   130  		logs[i] = receipt.Logs
   131  	}
   132  	return logs, nil
   133  }
   134  
   135  func (b *EthAPIBackend) GetTd(blockHash common.Hash) *big.Int {
   136  	return b.eth.blockchain.GetTdByHash(blockHash)
   137  }
   138  
   139  func (b *EthAPIBackend) GetEVM(ctx context.Context, msg core.Message, state *state.StateDB, header *types.Header, vmCfg vm.Config) (*vm.EVM, func() error, error) {
   140  	state.SetBalance(msg.From(), common.SystemAssetID, math.MaxBig256)
   141  	vmError := func() error { return nil }
   142  
   143  	context := core.NewEVMContext(msg, header, b.eth.BlockChain(), nil)
   144  	return vm.NewEVM(context, state, b.eth.chainConfig, vmCfg), vmError, nil
   145  }
   146  
   147  func (b *EthAPIBackend) SubscribeRemovedLogsEvent(ch chan<- core.RemovedLogsEvent) event.Subscription {
   148  	return b.eth.BlockChain().SubscribeRemovedLogsEvent(ch)
   149  }
   150  
   151  func (b *EthAPIBackend) SubscribeChainEvent(ch chan<- core.ChainEvent) event.Subscription {
   152  	return b.eth.BlockChain().SubscribeChainEvent(ch)
   153  }
   154  
   155  func (b *EthAPIBackend) SubscribeChainHeadEvent(ch chan<- core.ChainHeadEvent) event.Subscription {
   156  	return b.eth.BlockChain().SubscribeChainHeadEvent(ch)
   157  }
   158  
   159  func (b *EthAPIBackend) SubscribeChainSideEvent(ch chan<- core.ChainSideEvent) event.Subscription {
   160  	return b.eth.BlockChain().SubscribeChainSideEvent(ch)
   161  }
   162  
   163  func (b *EthAPIBackend) SubscribeLogsEvent(ch chan<- []*types.Log) event.Subscription {
   164  	return b.eth.BlockChain().SubscribeLogsEvent(ch)
   165  }
   166  
   167  func (b *EthAPIBackend) SendTx(ctx context.Context, signedTx *types.Transaction) error {
   168  	return b.eth.txPool.AddLocal(signedTx)
   169  }
   170  
   171  func (b *EthAPIBackend) GetPoolTransactions() (types.Transactions, error) {
   172  	pending, err := b.eth.txPool.Pending()
   173  	if err != nil {
   174  		return nil, err
   175  	}
   176  	var txs types.Transactions
   177  	for _, batch := range pending {
   178  		txs = append(txs, batch...)
   179  	}
   180  	return txs, nil
   181  }
   182  
   183  func (b *EthAPIBackend) GetPoolTransaction(hash common.Hash) *types.Transaction {
   184  	return b.eth.txPool.Get(hash)
   185  }
   186  
   187  func (b *EthAPIBackend) GetPoolTransactionByPredicate(predicate func(*types.Transaction) bool) *types.Transaction {
   188  	return b.eth.txPool.GetByPredicate(predicate)
   189  }
   190  
   191  func (b *EthAPIBackend) GetPoolNonce(ctx context.Context, addr common.Address) (uint64, error) {
   192  	return b.eth.txPool.State().GetNonce(addr), nil
   193  }
   194  
   195  func (b *EthAPIBackend) Stats() (pending int, queued int) {
   196  	return b.eth.txPool.Stats()
   197  }
   198  
   199  func (b *EthAPIBackend) TxPoolContent() (map[common.Address]types.Transactions, map[common.Address]types.Transactions) {
   200  	return b.eth.TxPool().Content()
   201  }
   202  
   203  func (b *EthAPIBackend) SubscribeNewTxsEvent(ch chan<- core.NewTxsEvent) event.Subscription {
   204  	return b.eth.TxPool().SubscribeNewTxsEvent(ch)
   205  }
   206  
   207  func (b *EthAPIBackend) Downloader() *downloader.Downloader {
   208  	return b.eth.Downloader()
   209  }
   210  
   211  func (b *EthAPIBackend) ProtocolVersion() int {
   212  	return b.eth.EthVersion()
   213  }
   214  
   215  func (b *EthAPIBackend) SuggestPrice(ctx context.Context) (*big.Int, error) {
   216  	return b.gpo.SuggestPrice(ctx)
   217  }
   218  
   219  func (b *EthAPIBackend) ChainDb() ethdb.Database {
   220  	return b.eth.ChainDb()
   221  }
   222  
   223  func (b *EthAPIBackend) EventMux() *event.TypeMux {
   224  	return b.eth.EventMux()
   225  }
   226  
   227  func (b *EthAPIBackend) AccountManager() *accounts.Manager {
   228  	return b.eth.AccountManager()
   229  }
   230  
   231  func (b *EthAPIBackend) BloomStatus() (uint64, uint64) {
   232  	sections, _, _ := b.eth.bloomIndexer.Sections()
   233  	return params.BloomBitsBlocks, sections
   234  }
   235  
   236  func (b *EthAPIBackend) ServiceFilter(ctx context.Context, session *bloombits.MatcherSession) {
   237  	for i := 0; i < bloomFilterThreads; i++ {
   238  		go session.Multiplex(bloomRetrievalBatch, bloomRetrievalWait, b.eth.bloomRequests)
   239  	}
   240  }
   241  
   242  func (b *EthAPIBackend) IsMining() bool {
   243  	return b.eth.IsMining()
   244  }
   245  
   246  func (b *EthAPIBackend) Coinbase() (common.Address, error) {
   247  	return b.eth.Etherbase()
   248  }