Token-2022 is an upgraded token standard on Solana that extends the original SPL token standard with additional features. It is maintained by the Solana Program Library and is available on Solana mainnet.

Token-2022 supports a range of extensions including transfer fees (transfer taxes), interest-bearing tokens, non-transferable tokens, permanent delegate authority, and confidential transfers. These features enable more complex tokenomics that are not possible with standard SPL tokens.

Token-2022 tokens are increasingly common on Solana, particularly for projects that require transfer tax mechanics to fund liquidity, buybacks, or rewards distributions.