High Level Overview of Change

New Transactions:

• MPTokenIssuanceCreate
• MPTokenIssuanceDestory
• MPTokenIssuanceSet
• MPTokenAuthorize

Modified Transactions:

• Payment
• Clawback

New Objects:

• MPTokenIssuance
• MPToken

API updates:

• ledger_entry
• account_objects
• ledger_data

Refactor:

• Add new types Asset, MPTIssue, MPTAmount to handle MPT amount.
• Add SOElement constructor overload to describe the amount fields, which may have MPT amount (currently only sfAmount). The constructors are used in TxFormats to define fields supporting MPT.

Context of Change

• XLS-33d specification

Type of Change

• Bug fix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)
• Breaking change (fix or feature that would cause existing functionality to not work as expected)
• Refactor (non-breaking change that only restructures code)
• Performance (increase or change in throughput and/or latency)
• Tests (you added tests for code that already exists, or your new feature included in this PR)
• Documentation update
• Chore (no impact to binary, e.g. .gitignore, formatting, dropping support for older tooling)
• Release

API Impact

• Public API: New feature (new methods and/or new fields)
• Public API: Breaking change (in general, breaking changes should only impact the next api_version)
• libxrpl change (any change that may affect libxrpl or dependents of libxrpl)
• Peer protocol change (must be backward compatible or bump the peer protocol version)

Test Plan

Added test for new feature:

• MPT

Future Tasks

Integrate MPT into XRPL DEX.