Network Health & Validator Intelligence

Technical Details:

Amendment ID	950AE2EA4654E47F04AA8739C0B214E242097E802FD372D24047A89AB1F5EC38
Status	Open for Voting
Default Vote (Latest stable release)	No
Pre-amendment functionality retired?	No

Description:

Implements a new type of fungible token, called a Multi-Purpose Token (MPT). This token type is optimized to be used for common token use cases such as stablecoins, and are intended to avoid some of the complexity inherent to the XRP Ledger's existing fungible tokens which are stored in bidirectional trust lines. This amendment adds the following:

New ledger entry types:

• MPToken - represents tokens held by a specific account, including the amount held and who issued them.
• MPTokenIssuance - records information and settings for a specific issuance of MPT, such as the scale and transfer fee of those tokens.

Transaction types:

• (New) MPTokenIssuanceCreate - Define a new issuance of MPTs.
• (New) MPTokenIssuanceDestroy - Remove an issuance definition.
• (New) MPTokenIssuanceSet - Modify an issuance definition.
• (New) MPTokenAuthorize - Allow an account to hold a specific issuance definition.
• (Updated) Payment transactions can also send MPTs.
• (Updated) Clawback transactions can also claw back MPTs if the issuance definition allows clawback.

API Methods:

• (New) mpt_holders method - Returns a list of accounts that hold a specific MPT issuance.
• (Updated) ledger_entry method - Can look up MPToken and MPTokenIssuance ledger entry types.

Technical Details:

Amendment ID	A730EB18A9D4BB52502C898589558B4CCEB4BE10044500EE5581137A2E80E849
Status	Open for Voting
Default Vote (Latest stable release)	No
Pre-amendment functionality retired?	No

Description:

Permissioned domains are controlled environments within the broader ecosystem of the XRP Ledger blockchain. Domains do nothing on their own, but features such as Permissioned DEXes and Lending Protocols can use domains to restrict access, so that traditional financial institutions can offer services on chain while complying with various compliance rules.

This amendment creates a new ledger entry type, PermissionedDomain, and new transactions, PermissionedDomainSet (creates or modifies permissioned domains) and PermissionedDomainDelete (deletes permissioned domains).

Technical Details:

Amendment ID	2BF037D90E1B676B17592A8AF55E88DB465398B4B597AE46EECEE1399AB05699
Status	Open for Voting
Default Vote (Latest stable release)	No
Pre-amendment functionality retired?	No

Description:

This amendment ensures that reward shares for cross-chain transactions are always rounded down. This preserves the original intended behavior.

Without this amendment, the XChainBridge amendment has an incompatibility with the fixUniversalNumber amendment. When those two amendments are both enabled, the Number type may be used for some intermediate calculations of token amounts. In some cases, values that used to round down instead are rounded to nearest, which alters the intended rounding behavior for reward shares in cross-chain transactions.

This amendment restores the intended rounding behavior. It has no effect unless both the XChainBridge and fixUniversalNumber amendments are also enabled.

Technical Details:

Amendment ID	894646DD5284E97DECFE6674A6D6152686791C4A95F8C132CCA9BAF9E5812FB6
Status	Open for Voting
Default Vote (Latest stable release)	No
Pre-amendment functionality retired?	No

Description:

Allows multiple transactions to be bundled into a batch that's processed all together. Standard: XLS-56d

Technical Details:

Amendment ID	138B968F25822EFBF54C00F97031221C47B1EAB8321D93C7C2AEAF85F04EC5DF
Status	Open for Voting
Default Vote (Latest stable release)	No
Pre-amendment functionality retired?	No

Description:

Extends the existing Escrow functionality to support escrowing issued tokens or MPTs.

Specification: XLS-85

Technical Details:

Amendment ID	677E401A423E3708363A36BA8B3A7D019D21AC5ABD00387BDBEA6BDE4C91247E
Status	Open for Voting
Default Vote (Latest stable release)	No
Pre-amendment functionality retired?	No

Description:

Creates Permissioned DEXes, controlled environments for trading within the XRP Ledger's decentralized exchange (DEX). Trading in a permissioned DEX works like trading in the open DEX, except that a permissioned domain controls who can place and accept offers.

Specification: XLS-81

Technical Details:

Amendment ID	C98D98EE9616ACD36E81FDEB8D41D349BF5F1B41DD64A0ABC1FE9AA5EA267E9C
Status	Open for Voting
Default Vote (Latest stable release)	No
Pre-amendment functionality retired?	No

Description:

Adds cross-chain bridges, enabling the transfer of digital assets between networks (for example, between Mainnet and a sidechain). Standards draft: XLS-0038 Cross-Chain Bridge.

Adds new transactions:

• XChainAccountCreateCommit - Create a new account for a witness server to submit transactions on an issuing chain..
• XChainAddAccountCreateAttestation - Provide an attestation that an account was created for a witness server to use.
• XChainAddClaimAttestation - Provide an attestation that assets were locked on a locking chain.
• XChainClaim - Claim assets on the destination chain.
• XChainCommit - Locks assets on the locking chain.
• XChainCreateBridge - Create a bridge ledger object.
• XChainCreateClaimID - Create a new cross-chain claim ID that is used for a cross-chain transfer.
• XChainModifyBridge - Modify the parameters of a bridge.

Adds new ledger entry types:

• Bridge - A single cross-chain bridge that connects the XRP Ledger with another blockchain.
• XChainOwnedClaimID - A cross-chain transfer of value that includes information of the account on the source chain that locks or burns the funds on the source chain.
• XChainOwnedCreateAccountClaimID - Collects attestations for creating an account via a cross-chain transfer.

Adds several new transaction result codes.

Technical Details:

Amendment ID	AE6AB9028EEB7299EBB03C7CBCC3F2A4F5FBE00EA28B8223AA3118A0B436C1C5
Status	Open for Voting
Default Vote (Latest stable release)	No
Pre-amendment functionality retired?	No

Description:

Allows accounts to delegate some permissions to other accounts.

Specification: XLS-75.

Technical Details:

Amendment ID	0285B7E5E08E1A8E4C15636F0591D87F73CB6A7B6452A932AD72BBC8E5D1CBE3
Status	Obsolete
Default Vote (Latest stable release)	No
Pre-amendment functionality retired?	No

Description:

This amendment fixes an off-by-one error that occurred in some corner cases when determining which NFTokenPage a NFToken object belongs on. It also adjusts the constraints of NFTokenPage invariant checks, so that certain error cases fail with a suitable error code such as tecNO_SUITABLE_TOKEN_PAGE instead of failing with a tecINVARIANT_FAILED error code.

This amendment has no effect unless the NonFungibleTokensV1 amendment is enabled. This amendment is obsolete because its effects are included as part of NonFungibleTokensV1_1.

Technical Details:

Amendment ID	36799EA497B1369B170805C078AEFE6188345F9B3E324C21E9CA3FF574E3C3D6
Status	Obsolete
Default Vote (Latest stable release)	No
Pre-amendment functionality retired?	No

Description:

This amendment fixes a bug in the NonFungibleTokensV1 amendment code where NFTs could be traded for negative amounts of money. Without this fix, users could place and accept an offer to buy or sell a NFToken for a negative amount of money, which resulted in the person "buying" the NFT also receiving money from the "seller". With this amendment, NFT offers for negative amounts are considered invalid.

This amendment has no effect unless the NonFungibleTokensV1 amendment is enabled. This amendment is obsolete because its effects are included as part of NonFungibleTokensV1_1.

Technical Details:

Amendment ID	3C43D9A973AA4443EF3FC38E42DD306160FBFFDAB901CD8BAA15D09F2597EB87
Status	Obsolete
Default Vote (Latest stable release)	No
Pre-amendment functionality retired?	No

Description:

Adds native support for non-fungible tokens. Standards Draft: XLS-20d.

There are several known issues with this amendment including one that can cause tecINVARIANT_FAILED errors to appear in the ledger. It has been replaced by the NonFungibleTokensV1_1 amendment.

This amendment adds 5 new transaction types:

• NFTokenAcceptOffer
• NFTokenBurn
• NFTokenCancelOffer
• NFTokenCreateOffer
• NFTokenMint

It also adds 2 new ledger object types:

• NFTokenOffer object
• NFTokenPage object

Additionally, it modifies the AccountRoot object type to add 3 new optional fields: MintedNFTokens, BurnedNFTokens, and NFTokenMinter.

It also modifies the AccountSet transaction type to allow you to set the NFTokenMinter field.

Technical Details:

Amendment ID	86E83A7D2ECE3AD5FA87AB2195AE015C950469ABF0B72EAACED318F74886AE90
Status	Obsolete
Default Vote (Latest stable release)	No
Pre-amendment functionality retired?	No

Description:

This amendment was intended to add support for several types of crypto-conditions from the official crypto-conditions specification for use in EscrowCreate and EscrowFinish transactions.

However, the amendment was added to rippled v0.60.0 before implementation was complete. As a result, this amendment ID refers to incomplete code which does almost nothing. Modifying the existing amendment to add support for other crypto-conditions would cause a conflict with old versions of the amendment already in released software. If a future release adds support for additional crypto-conditions, it must use a new and different amendment ID.