ethinterface

type EthClientSpec interface {
	bind.ContractBackend
	TransactionReceipt(ctx context.Context, txHash common.Hash) (*types.Receipt, error)
	BalanceAt(ctx context.Context, account common.Address, blockNumber *big.Int) (*big.Int, error)
	HeaderByNumber(ctx context.Context, number *big.Int) (*types.Header, error)
}

type SimExtend struct {
	*backends.SimulatedBackend
}