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Overview โ€‹


The FA2 library has been introduced on March 4th, 2022 and officially replaces the legacy template since June 4th, 2022.

Introduction โ€‹

FA2 is the Tezos standard for a unified token contract interface.

It supports a wide range of token types and implementations (fungible tokens, NFTsโ€ฆ).

FA2 has been standardized through a system called TZIP.
> TZIP-12 and TZIP-16 are the related specifications.
FA2 offers possibilities equivalent to ERC-20, ERC-721 or ERC-1155 in Ethereum.

Library โ€‹

SmartPy provides a modular (experimental) FA2 library that can be configured and adapted with custom logic to support a very wide range of needs.

import smartpy as sp
FA2 ="")

Resources โ€‹

Token identification โ€‹

A token is uniquely identified on the chain by:

  • the token contract address
  • a token ID, a natural number (nat).

If the contract supports only a single token, the token ID MUST be 0. Otherwise the contract is fully responsible for assigning and managing token IDs.

FA2 library manages incrementing token ids.