package interfaces import ( "context" "math/big" "github.com/ethereum/go-ethereum/common" "github.com/ethereum/go-ethereum/consensus" "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/ethdb" "github.com/ethereum/go-ethereum/event" "github.com/ethereum/go-ethereum/params" "github.com/ethereum/go-ethereum/rpc" ) // Backend interface provides the common API services (that are provided by // both full and light clients) with access to necessary functions. type Backend interface { // General Ethereum API Downloader() *downloader.Downloader SuggestGasTipCap(ctx context.Context) (*big.Int, error) ChainDb() ethdb.Database ExtRPCEnabled() bool RPCGasCap() uint64 // global gas cap for eth_call over rpc: DoS protection RPCTxFeeCap() float64 // global tx fee cap for all transaction related APIs UnprotectedAllowed() bool // allows only for EIP155 transactions. // Blockchain API SetHead(number uint64) HeaderByNumber(ctx context.Context, number rpc.BlockNumber) (*types.Header, error) HeaderByHash(ctx context.Context, hash common.Hash) (*types.Header, error) HeaderByNumberOrHash(ctx context.Context, blockNrOrHash rpc.BlockNumberOrHash) (*types.Header, error) CurrentHeader() *types.Header CurrentBlock() *types.Block BlockByNumber(ctx context.Context, number rpc.BlockNumber) (*types.Block, error) BlockByHash(ctx context.Context, hash common.Hash) (*types.Block, error) BlockByNumberOrHash(ctx context.Context, blockNrOrHash rpc.BlockNumberOrHash) (*types.Block, error) StateAndHeaderByNumber(ctx context.Context, number rpc.BlockNumber) (*state.StateDB, *types.Header, error) StateAndHeaderByNumberOrHash(ctx context.Context, blockNrOrHash rpc.BlockNumberOrHash) (*state.StateDB, *types.Header, error) GetReceipts(ctx context.Context, hash common.Hash) (types.Receipts, error) GetTd(ctx context.Context, hash common.Hash) *big.Int GetEVM(ctx context.Context, msg core.Message, state *state.StateDB, header *types.Header, cfg *vm.Config) (*vm.EVM, func() error, error) SubscribeChainEvent(ch chan<- core.ChainEvent) event.Subscription SubscribeChainHeadEvent(ch chan<- core.ChainHeadEvent) event.Subscription SubscribeChainSideEvent(ch chan<- core.ChainSideEvent) event.Subscription // Transaction pool API SendTx(ctx context.Context, signedTx *types.Transaction) error GetTransaction(ctx context.Context, txHash common.Hash) (*types.Transaction, common.Hash, uint64, uint64, error) GetPoolTransactions() (types.Transactions, error) GetPoolTransaction(txHash common.Hash) *types.Transaction GetPoolNonce(ctx context.Context, addr common.Address) (uint64, error) Stats() (pending int, queued int) TxPoolContent() (map[common.Address]types.Transactions, map[common.Address]types.Transactions) SubscribeNewTxsEvent(chan<- core.NewTxsEvent) event.Subscription // Filter API BloomStatus() (uint64, uint64) GetLogs(ctx context.Context, blockHash common.Hash) ([][]*types.Log, error) ServiceFilter(ctx context.Context, session *bloombits.MatcherSession) SubscribeLogsEvent(ch chan<- []*types.Log) event.Subscription SubscribePendingLogsEvent(ch chan<- []*types.Log) event.Subscription SubscribeRemovedLogsEvent(ch chan<- core.RemovedLogsEvent) event.Subscription ChainConfig() *params.ChainConfig Engine() consensus.Engine } type TracerResult interface { vm.Tracer GetResult() (interface{}, error) }