Glossary · Standards

What is Token-2022 (SPL)?

Token-2022 is Solana's programmable token standard: everything the classic SPL token does, plus an extension system that lets an issuer configure transfer hooks, transfer fees, freeze and mint authorities, confidential transfers, and metadata directly on the token itself.

For regulated assets that is the unlock: compliance powers (who may hold, when transfers pause) live on-chain in the token program rather than bolted on by each venue. The same machinery that makes a token compliant also makes its powers visible: the extensions are public data, and U.CASH lists them on every Token-2022 asset page.

How Token-2022 (SPL) works

Token-2022 is Solana's modern token program: the extension-capable successor to the original SPL token standard. Where the original defined one fixed behavior, Token-2022 builds a menu of extensions a token can enable at creation: transfer fees taken at the protocol level, interest-bearing balances, confidential transfers, metadata attached to the mint itself, and compliance hooks including transfer rules.

The design point is that features stop requiring custom programs. A token that wants a transfer fee gets one natively rather than wrapping itself in bespoke logic; a token with compliance obligations encodes them as extensions the chain enforces. Each token picks its menu, and wallets and tools read the enabled set.

For payments people, the two extensions that matter most are transfer fees, which make the cost of moving a token explicit at the protocol layer rather than buried in pool math, and the transfer-rule hooks that tokenized securities use for eligibility. The Solana tokenized assets in the U.CASH roster ride Token-2022, which is where their on-chain compliance behavior lives.

Token-2022 (SPL) in practice

A tokenized equity on Solana enables the transfer-rule extension, so eligibility enforcement happens in the token program itself: an ineligible transfer reverts at the chain level, not in an off-chain filter that someone might route around. The extension menu also composes: a single token can carry transfer fees and rules and on-mint metadata together, which is how the serious tokenized issuances ship, one program account carrying its full behavior profile, readable by any tool that speaks the standard, rather than a constellation of side contracts each holding part of the story.

Token-2022 (SPL) on U.CASH

Every Solana asset on U.CASH, from the xStocks to the pegged stablecoins, is a Token-2022 token; each asset page shows its program, decimals, authorities, and the exact extension set the issuer configured.

Merchants holding or accepting Solana tokenized assets are interacting with Token-2022's extension set, particularly the compliance hooks. Asset pages state what each token enforces, and the standard is what makes those statements checkable on-chain rather than contractual prose.

Related standards terms

ERC-20TRC-20ISIN

See also

ERC-20All tokenized stocks

Token-2022 (SPL): FAQ

Why do issuers want freeze powers on a token?
Regulated issuers must be able to freeze or pause for compliance (sanctions, court order, error). On Token-2022 that power is a disclosed on-chain configuration, not a surprise.
What is a transfer hook?
A program the token calls on every transfer, letting the issuer enforce rules (eligibility, limits) at the protocol level. Transfers that fail the hook revert on-chain.
What does the 2022 refer to?
The program's adoption year, distinguishing it from Solana's original token program. Both run today; Token-2022 is the extension-capable one new tokens choose.
Which extensions matter for payments?
Transfer fees, which surface cost at the protocol level, and the transfer rules that tokenized securities use for eligibility. Metadata-on-mint simplifies the operational bookkeeping around tokens.
Do wallets treat Token-2022 differently?
They read the enabled extensions and behave accordingly: a fee-bearing token shows its fee, a rule-bound token enforces its rules at send. The standard exists precisely so this is automatic.
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