solana-dev/references/kit/programs/token-2022.md

title, description

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Token-2022 (Token Extensions)	Kit-compatible @solana-program/token-2022 client — key differences from base Token program, account sizing, ATA derivation, and extension reference.

Token-2022 (Token Extensions)

Program address: TokenzQdBNbLqP5VEhdkAS6EPFLC1PHnBqCXEpPxuEb

import { TOKEN_2022_PROGRAM_ADDRESS } from '@solana-program/token-2022';

Token-2022 extends the base Token program with configurable extensions. For a full guide to available extensions and their use cases, see the Token Extensions documentation.

When to Use Token-2022 vs Token

Use Token-2022	Use Token
Transfer fees needed	Simple fungible tokens
On-chain metadata	Maximum compatibility
Confidential transfers	Lowest compute cost
Transfer hooks	Existing ecosystem integration
Interest-bearing tokens
Non-transferable tokens

Key Differences from Base Token

Variable Account Sizes

Unlike base Token (fixed 82/165 byte accounts), Token-2022 sizes vary by extension. Calculate before creating or rent allocation fails:

import { getMintSize, getTokenSize } from '@solana-program/token-2022';

// Without extensions
const baseSize = getMintSize(); // 82 bytes

// With extensions - pass extension configs
const sizeWithExtensions = getMintSize([
  { extension: 'TransferFeeConfig', ... },
  { extension: 'MetadataPointer', ... },
]);

ATA Derivation

Same pattern as base Token, but you must pass TOKEN_2022_PROGRAM_ADDRESS — using the wrong program address derives the wrong ATA.

import { findAssociatedTokenPda, TOKEN_2022_PROGRAM_ADDRESS } from '@solana-program/token-2022';

const [ata] = await findAssociatedTokenPda({
  owner: walletAddress,
  mint: mintAddress,
  tokenProgram: TOKEN_2022_PROGRAM_ADDRESS,
});

Extension Initialization Order

Extension instructions must come before mint initialization — the runtime processes them in order and mint init finalizes the account.

Account Fetching

Same patterns as base Token — extensions are accessible via mint.data.extensions:

import { fetchMint, fetchToken } from '@solana-program/token-2022';

const mint = await fetchMint(rpc, mintAddress);
// Access extensions via mint.data.extensions

Extensions Reference

See Token Extensions documentation for implementation details on each extension.