backend

type Geth interface {
	BalanceAt(ctx context.Context, account common.Address, blockNumber *big.Int) (*big.Int, error)
	BlockNumber(ctx context.Context) (uint64, error)
	CallContract(ctx context.Context, msg ethereum.CallMsg, blockNumber *big.Int) ([]byte, error)
	ChainID(ctx context.Context) (*big.Int, error)
	Close()
	EstimateGasAtBlock(ctx context.Context, msg ethereum.CallMsg, blockNumber *big.Int) (uint64, error)
	FilterLogs(ctx context.Context, q ethereum.FilterQuery) ([]types.Log, error)
	HeaderByNumber(ctx context.Context, number *big.Int) (*types.Header, error)
	NonceAt(ctx context.Context, account common.Address, blockNumber *big.Int) (uint64, error)
	PendingNonceAt(ctx context.Context, account common.Address) (uint64, error)
	SendTransaction(ctx context.Context, tx *types.Transaction) error
	SuggestGasTipCap(ctx context.Context) (*big.Int, error)
	TransactionByHash(ctx context.Context, hash common.Hash) (tx *types.Transaction, isPending bool, err error)
	TransactionReceipt(ctx context.Context, txHash common.Hash) (*types.Receipt, error)
}