title: NFTokenMintOffer
type: Spec
author: tequ

Abstract

This proposal extends the minting capabilities of NFToken (XLS-20).

NFToken are not only held by the issuer, but are often distributed or sold by the issuer to others.

XRPL NFToken requires two transactions (NFTokenMint and NFTokenCreateOffer) to be sent by the issuer before the NFToken can be minted and distributed (or sold). NFTokenOfferMint extends the existing NFTokenMint transaction to allow an NFToken Sell Offer to be created at the same time as the NFToken is minted.

NFTokenOfferMint is expected to significantly improve the experience of NFT projects and users.

Specification

New NFTokenMint Transaction Field

Add 3 new fields to theNFTokenMint transaction.

Field Name	Required?	JSON Type	Internal Type
Amount		Currency Amount	AMOUNT
Destination		string	AccountID
Expiration		number	UINT32

These fields have the same meaning as the field of the same name used in the NFTokenCreateOffer transaction, but the Amount field is not a required field.

If the Amount field (and the other 2 fields) are not specified, NFTokenMint transaction behaves exactly like a previous NFTokenMint transaction.

Creating an NFTokenOffer

Since NFToken issuers can only create a sell offer for their NFToken, the Owner field is not set and tfSellNFToken flag is always set in the NFTokenOffer created in an NFTokenMint transaction.

In an extended NFTokenMint transaction, an NFTokenOffer is created when

• Amount field is specified.

An error occurs in the following cases

• One or both of Destination and Expiration fields are specified, but the Amount field is not .

Owner Reserve

The NFTokenPage and NFTokenOffer reserves will not change, but will create the possibility of up to 2 incremental reserves (NFTokenPage, NFTokenOffer) in an NFTokenMint transaction.