Module issue 

Structs

IouIssue

Defines an issue for IOUs (40 bytes: 20-byte currency + 20-byte issuer).

MptIssue

Struct to represent an Issue of type MPT. Exists so that other structs can restrict type information to MPT in their declarations (this is not possible with just the Issue enum below).

XrpIssue

Struct to represent an Issue of type XRP. Exists so that other structs can restrict type information to XRP in their declarations (this is not possible with just the Issue enum below).

Enums

Issue

Represents an issue without a value, such as reading Asset1 and Asset2 in AMM ledger objects.