github.com/m3shine/gochain@v2.2.26+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  	"go.opencensus.io/trace"
    24  
    25  	"github.com/gochain-io/gochain/accounts"
    26  	"github.com/gochain-io/gochain/common"
    27  	"github.com/gochain-io/gochain/common/math"
    28  	"github.com/gochain-io/gochain/core"
    29  	"github.com/gochain-io/gochain/core/bloombits"
    30  	"github.com/gochain-io/gochain/core/state"
    31  	"github.com/gochain-io/gochain/core/types"
    32  	"github.com/gochain-io/gochain/core/vm"
    33  	"github.com/gochain-io/gochain/eth/downloader"
    34  	"github.com/gochain-io/gochain/eth/gasprice"
    35  	"github.com/gochain-io/gochain/event"
    36  	"github.com/gochain-io/gochain/log"
    37  	"github.com/gochain-io/gochain/params"
    38  	"github.com/gochain-io/gochain/rpc"
    39  )
    40  
    41  // EthApiBackend implements ethapi.Backend for full nodes
    42  type EthApiBackend struct {
    43  	eth           *GoChain
    44  	initialSupply *big.Int
    45  	gpo           *gasprice.Oracle
    46  }
    47  
    48  func (b *EthApiBackend) ChainConfig() *params.ChainConfig {
    49  	return b.eth.chainConfig
    50  }
    51  
    52  func (b *EthApiBackend) InitialSupply() *big.Int {
    53  	return b.initialSupply
    54  }
    55  
    56  func (b *EthApiBackend) GenesisAlloc() core.GenesisAlloc {
    57  	if g := b.eth.config.Genesis; g != nil {
    58  		return g.Alloc
    59  	}
    60  	return nil
    61  }
    62  
    63  func (b *EthApiBackend) CurrentBlock() *types.Block {
    64  	return b.eth.blockchain.CurrentBlock()
    65  }
    66  
    67  func (b *EthApiBackend) SetHead(number uint64) {
    68  	b.eth.protocolManager.downloader.Cancel()
    69  	if err := b.eth.blockchain.SetHead(number); err != nil {
    70  		log.Error("Cannot set eth api backend head", "number", number, "err", err)
    71  	}
    72  }
    73  
    74  func (b *EthApiBackend) HeaderByNumber(ctx context.Context, blockNr rpc.BlockNumber) (*types.Header, error) {
    75  	ctx, span := trace.StartSpan(ctx, "EthApiBackend.HeaderByNumber")
    76  	defer span.End()
    77  	// Pending block is only known by the miner
    78  	if blockNr == rpc.PendingBlockNumber {
    79  		block := b.eth.miner.PendingBlock(ctx)
    80  		if block == nil {
    81  			return nil, nil
    82  		}
    83  		return block.Header(), nil
    84  	}
    85  	// Otherwise resolve and return the block
    86  	if blockNr == rpc.LatestBlockNumber {
    87  		return b.eth.blockchain.CurrentBlock().Header(), nil
    88  	}
    89  	return b.eth.blockchain.GetHeaderByNumber(uint64(blockNr)), nil
    90  }
    91  
    92  func (b *EthApiBackend) HeaderByHash(ctx context.Context, hash common.Hash) (*types.Header, error) {
    93  	return b.eth.blockchain.GetHeaderByHash(hash), nil
    94  }
    95  
    96  func (b *EthApiBackend) BlockByNumber(ctx context.Context, blockNr rpc.BlockNumber) (*types.Block, error) {
    97  	ctx, span := trace.StartSpan(ctx, "EthApiBackend.BlockByNumber")
    98  	defer span.End()
    99  	span.AddAttributes(trace.Int64Attribute("num", int64(blockNr)))
   100  	// Pending block is only known by the miner
   101  	if blockNr == rpc.PendingBlockNumber {
   102  		block := b.eth.miner.PendingBlock(ctx)
   103  		return block, nil
   104  	}
   105  	// Otherwise resolve and return the block
   106  	if blockNr == rpc.LatestBlockNumber {
   107  		return b.eth.blockchain.CurrentBlock(), nil
   108  	}
   109  	return b.eth.blockchain.GetBlockByNumber(uint64(blockNr)), nil
   110  }
   111  
   112  func (b *EthApiBackend) StateAndHeaderByNumber(ctx context.Context, blockNr rpc.BlockNumber) (*state.StateDB, *types.Header, error) {
   113  	ctx, span := trace.StartSpan(ctx, "EthApiBackend.StateAndHeaderByNumber")
   114  	defer span.End()
   115  	// Pending state is only known by the miner
   116  	if blockNr == rpc.PendingBlockNumber {
   117  		block, state := b.eth.miner.Pending(ctx)
   118  		return state, block.Header(), nil
   119  	}
   120  	// Otherwise resolve the block number and return its state
   121  	header, err := b.HeaderByNumber(ctx, blockNr)
   122  	if header == nil || err != nil {
   123  		return nil, nil, err
   124  	}
   125  	stateDb, err := b.eth.BlockChain().StateAt(header.Root)
   126  	return stateDb, header, err
   127  }
   128  
   129  func (b *EthApiBackend) GetBlock(ctx context.Context, hash common.Hash) (*types.Block, error) {
   130  	return b.eth.blockchain.GetBlockByHash(hash), nil
   131  }
   132  
   133  func (b *EthApiBackend) GetReceipts(ctx context.Context, hash common.Hash) (types.Receipts, error) {
   134  	return b.eth.blockchain.GetReceiptsByHash(hash), nil
   135  }
   136  
   137  func (b *EthApiBackend) GetLogs(ctx context.Context, hash common.Hash) ([][]*types.Log, error) {
   138  	receipts := b.eth.blockchain.GetReceiptsByHash(hash)
   139  	if receipts == nil {
   140  		return nil, nil
   141  	}
   142  	logs := make([][]*types.Log, len(receipts))
   143  	for i, receipt := range receipts {
   144  		logs[i] = receipt.Logs
   145  	}
   146  	return logs, nil
   147  }
   148  
   149  func (b *EthApiBackend) GetTd(blockHash common.Hash) *big.Int {
   150  	return b.eth.blockchain.GetTdByHash(blockHash)
   151  }
   152  
   153  func (b *EthApiBackend) GetEVM(ctx context.Context, msg core.Message, state *state.StateDB, header *types.Header, vmCfg vm.Config) (*vm.EVM, error) {
   154  	ctx, span := trace.StartSpan(ctx, "EthApiBackend.GetEVM")
   155  	defer span.End()
   156  	state.SetBalance(msg.From(), math.MaxBig256)
   157  
   158  	context := core.NewEVMContext(msg, header, b.eth.BlockChain(), nil)
   159  	return vm.NewEVM(context, state, b.eth.chainConfig, vmCfg), nil
   160  }
   161  
   162  func (b *EthApiBackend) SubscribeRemovedLogsEvent(ch chan<- core.RemovedLogsEvent, name string) {
   163  	b.eth.BlockChain().SubscribeRemovedLogsEvent(ch, name)
   164  }
   165  
   166  func (b *EthApiBackend) UnsubscribeRemovedLogsEvent(ch chan<- core.RemovedLogsEvent) {
   167  	b.eth.BlockChain().UnsubscribeRemovedLogsEvent(ch)
   168  }
   169  
   170  func (b *EthApiBackend) SubscribeChainEvent(ch chan<- core.ChainEvent, name string) {
   171  	b.eth.BlockChain().SubscribeChainEvent(ch, name)
   172  }
   173  
   174  func (b *EthApiBackend) UnsubscribeChainEvent(ch chan<- core.ChainEvent) {
   175  	b.eth.BlockChain().UnsubscribeChainEvent(ch)
   176  }
   177  
   178  func (b *EthApiBackend) SubscribeChainHeadEvent(ch chan<- core.ChainHeadEvent, name string) {
   179  	b.eth.BlockChain().SubscribeChainHeadEvent(ch, name)
   180  }
   181  
   182  func (b *EthApiBackend) UnsubscribeChainHeadEvent(ch chan<- core.ChainHeadEvent) {
   183  	b.eth.BlockChain().UnsubscribeChainHeadEvent(ch)
   184  }
   185  
   186  func (b *EthApiBackend) SubscribeChainSideEvent(ch chan<- core.ChainSideEvent, name string) {
   187  	b.eth.BlockChain().SubscribeChainSideEvent(ch, name)
   188  }
   189  
   190  func (b *EthApiBackend) UnsubscribeChainSideEvent(ch chan<- core.ChainSideEvent) {
   191  	b.eth.BlockChain().UnsubscribeChainSideEvent(ch)
   192  }
   193  
   194  func (b *EthApiBackend) SubscribeLogsEvent(ch chan<- []*types.Log, name string) {
   195  	b.eth.BlockChain().SubscribeLogsEvent(ch, name)
   196  }
   197  
   198  func (b *EthApiBackend) UnsubscribeLogsEvent(ch chan<- []*types.Log) {
   199  	b.eth.BlockChain().UnsubscribeLogsEvent(ch)
   200  }
   201  
   202  func (b *EthApiBackend) SendTx(ctx context.Context, signedTx *types.Transaction) error {
   203  	return b.eth.txPool.AddLocal(ctx, signedTx)
   204  }
   205  
   206  func (b *EthApiBackend) GetPoolTransactions() types.Transactions {
   207  	ctx := context.TODO()
   208  	return b.eth.txPool.PendingList(ctx)
   209  }
   210  
   211  func (b *EthApiBackend) GetPoolTransaction(hash common.Hash) *types.Transaction {
   212  	return b.eth.txPool.Get(hash)
   213  }
   214  
   215  func (b *EthApiBackend) GetPoolNonce(ctx context.Context, addr common.Address) (uint64, error) {
   216  	return b.eth.txPool.State().GetNonce(addr), nil
   217  }
   218  
   219  func (b *EthApiBackend) Stats() (pending int, queued int) {
   220  	ctx, span := trace.StartSpan(context.Background(), "EthApiBackend.Stats")
   221  	defer span.End()
   222  	return b.eth.txPool.StatsCtx(ctx)
   223  }
   224  
   225  func (b *EthApiBackend) TxPoolContent(ctx context.Context) (map[common.Address]types.Transactions, map[common.Address]types.Transactions) {
   226  	ctx, span := trace.StartSpan(ctx, "EthApiBackend.TxPoolContent")
   227  	defer span.End()
   228  	return b.eth.TxPool().Content(ctx)
   229  }
   230  
   231  func (b *EthApiBackend) SubscribeNewTxsEvent(ch chan<- core.NewTxsEvent, name string) {
   232  	b.eth.TxPool().SubscribeNewTxsEvent(ch, name)
   233  }
   234  
   235  func (b *EthApiBackend) UnsubscribeNewTxsEvent(ch chan<- core.NewTxsEvent) {
   236  	b.eth.TxPool().UnsubscribeNewTxsEvent(ch)
   237  }
   238  
   239  func (b *EthApiBackend) Downloader() *downloader.Downloader {
   240  	return b.eth.Downloader()
   241  }
   242  
   243  func (b *EthApiBackend) ProtocolVersion() int {
   244  	return b.eth.EthVersion()
   245  }
   246  
   247  func (b *EthApiBackend) SuggestPrice(ctx context.Context) (*big.Int, error) {
   248  	return b.gpo.SuggestPrice(ctx)
   249  }
   250  
   251  func (b *EthApiBackend) ChainDb() common.Database {
   252  	return b.eth.ChainDb()
   253  }
   254  
   255  func (b *EthApiBackend) EventMux() *event.TypeMux {
   256  	return b.eth.EventMux()
   257  }
   258  
   259  func (b *EthApiBackend) AccountManager() *accounts.Manager {
   260  	return b.eth.AccountManager()
   261  }
   262  
   263  func (b *EthApiBackend) BloomStatus() (uint64, uint64) {
   264  	sections, _, _ := b.eth.bloomIndexer.Sections()
   265  	return params.BloomBitsBlocks, sections
   266  }
   267  
   268  func (b *EthApiBackend) ServiceFilter(ctx context.Context, session *bloombits.MatcherSession) {
   269  	for i := 0; i < bloomFilterThreads; i++ {
   270  		go session.Multiplex(bloomRetrievalBatch, bloomRetrievalWait, b.eth.bloomRequests)
   271  	}
   272  }