github.com/nitinawathare/ethereumassignment3@v0.0.0-20211021213010-f07344c2b868/go-ethereum/internal/ethapi/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 ethapi implements the general Ethereum API functions.
    18  package ethapi
    19  
    20  import (
    21  	"context"
    22  	"math/big"
    23  
    24  	"github.com/ethereum/go-ethereum/accounts"
    25  	"github.com/ethereum/go-ethereum/common"
    26  	"github.com/ethereum/go-ethereum/core"
    27  	"github.com/ethereum/go-ethereum/core/state"
    28  	"github.com/ethereum/go-ethereum/core/types"
    29  	"github.com/ethereum/go-ethereum/core/vm"
    30  	"github.com/ethereum/go-ethereum/eth/downloader"
    31  	"github.com/ethereum/go-ethereum/ethdb"
    32  	"github.com/ethereum/go-ethereum/event"
    33  	"github.com/ethereum/go-ethereum/params"
    34  	"github.com/ethereum/go-ethereum/rpc"
    35  )
    36  
    37  // Backend interface provides the common API services (that are provided by
    38  // both full and light clients) with access to necessary functions.
    39  type Backend interface {
    40  	// General Ethereum API
    41  	Downloader() *downloader.Downloader
    42  	ProtocolVersion() int
    43  	SuggestPrice(ctx context.Context) (*big.Int, error)
    44  	ChainDb() ethdb.Database
    45  	EventMux() *event.TypeMux
    46  	AccountManager() *accounts.Manager
    47  	ExtRPCEnabled() bool
    48  	RPCGasCap() *big.Int // global gas cap for eth_call over rpc: DoS protection
    49  
    50  	// BlockChain API
    51  	SetHead(number uint64)
    52  	HeaderByNumber(ctx context.Context, blockNr rpc.BlockNumber) (*types.Header, error)
    53  	BlockByNumber(ctx context.Context, blockNr rpc.BlockNumber) (*types.Block, error)
    54  	StateAndHeaderByNumber(ctx context.Context, blockNr rpc.BlockNumber) (*state.StateDB, *types.Header, error)
    55  	GetBlock(ctx context.Context, blockHash common.Hash) (*types.Block, error)
    56  	GetReceipts(ctx context.Context, blockHash common.Hash) (types.Receipts, error)
    57  	GetTd(blockHash common.Hash) *big.Int
    58  	GetEVM(ctx context.Context, msg core.Message, state *state.StateDB, header *types.Header) (*vm.EVM, func() error, error)
    59  	SubscribeChainEvent(ch chan<- core.ChainEvent) event.Subscription
    60  	SubscribeChainHeadEvent(ch chan<- core.ChainHeadEvent) event.Subscription
    61  	SubscribeChainSideEvent(ch chan<- core.ChainSideEvent) event.Subscription
    62  
    63  	// TxPool API
    64  	SendTx(ctx context.Context, signedTx *types.Transaction) error
    65  	GetPoolTransactions() (types.Transactions, error)
    66  	GetPoolTransaction(txHash common.Hash) *types.Transaction
    67  	GetPoolNonce(ctx context.Context, addr common.Address) (uint64, error)
    68  	Stats() (pending int, queued int)
    69  	TxPoolContent() (map[common.Address]types.Transactions, map[common.Address]types.Transactions)
    70  	SubscribeNewTxsEvent(chan<- core.NewTxsEvent) event.Subscription
    71  
    72  	ChainConfig() *params.ChainConfig
    73  	CurrentBlock() *types.Block
    74  }
    75  
    76  func GetAPIs(apiBackend Backend) []rpc.API {
    77  	nonceLock := new(AddrLocker)
    78  	return []rpc.API{
    79  		{
    80  			Namespace: "eth",
    81  			Version:   "1.0",
    82  			Service:   NewPublicEthereumAPI(apiBackend),
    83  			Public:    true,
    84  		}, {
    85  			Namespace: "eth",
    86  			Version:   "1.0",
    87  			Service:   NewPublicBlockChainAPI(apiBackend),
    88  			Public:    true,
    89  		}, {
    90  			Namespace: "eth",
    91  			Version:   "1.0",
    92  			Service:   NewPublicTransactionPoolAPI(apiBackend, nonceLock),
    93  			Public:    true,
    94  		}, {
    95  			Namespace: "txpool",
    96  			Version:   "1.0",
    97  			Service:   NewPublicTxPoolAPI(apiBackend),
    98  			Public:    true,
    99  		}, {
   100  			Namespace: "debug",
   101  			Version:   "1.0",
   102  			Service:   NewPublicDebugAPI(apiBackend),
   103  			Public:    true,
   104  		}, {
   105  			Namespace: "debug",
   106  			Version:   "1.0",
   107  			Service:   NewPrivateDebugAPI(apiBackend),
   108  		}, {
   109  			Namespace: "eth",
   110  			Version:   "1.0",
   111  			Service:   NewPublicAccountAPI(apiBackend.AccountManager()),
   112  			Public:    true,
   113  		}, {
   114  			Namespace: "personal",
   115  			Version:   "1.0",
   116  			Service:   NewPrivateAccountAPI(apiBackend, nonceLock),
   117  			Public:    false,
   118  		},
   119  	}
   120  }