backend

type OracleBackendChain interface {
	// ChainConfig gets the chain config
	ChainConfig() *params.ChainConfig
	BlockByHash(ctx context.Context, hash common.Hash) (*types.Block, error)
	BlockByNumber(ctx context.Context, number *big.Int) (*types.Block, error)
	HeaderByNumber(ctx context.Context, number *big.Int) (*types.Header, error)
	// SuggestGasPrice retrieves the currently suggested gas price to allow a timely
	// execution of a transaction. This is only used for non-determinstic pricing
	SuggestGasPrice(ctx context.Context) (*big.Int, error)

	// SuggestGasTipCap retrieves the currently suggested 1559 priority fee to allow
	// a timely execution of a transaction. This is only used for non-deterministic pricing.
	SuggestGasTipCap(ctx context.Context) (*big.Int, error)
}