meta

type Meta interface {
	// Cosigners returns cosigners' addresses and the cosigners threshold.
	//
	// If no cosigners are set, empty set and threshold zero is returned.
	Cosigners(*instruction.DataFixed) (map[common.Address]bool, uint64, error)

	// CheckConsistency validates instruction according to its opType.
	//
	// For example, for the F_FDC2 Prove OPCommand, it verifies the internal signature of the FDC message.
	CheckConsistency(*instruction.Data, common.Address) error

	// ThresholdBIPS returns custom thresholdBIPS for the instruction.
	// If no specific threshold is set -1 is returned.
	ThresholdBIPS(*instruction.DataFixed) (int, error)
}