Onchain identity
The wallet is linked to an identity record carrying claims from trusted issuers. Personal KYC data does not need to be made public.
Making internet-native securities possible.
ERC-3643 makes compliance part of a security's ownership logic: onchain identity, asset-specific eligibility rules and transfer conditions determine whether ownership can change. The result is a new financial primitive: securities that can be distributed, financed, composed and built upon onchain.
Why regulated assets need a permissioned standard.
ERC-20 / 721 / 1155
Permissionless by design
Standard token formats let any wallet hold and any wallet transfer. The right model for utility tokens, the wrong one for regulated instruments, where who can hold is the whole point.
The current solution
Compliance wrapped around the token
Allow-lists and off-chain gatekeeping sit beside the asset. They have to be re-implemented on every venue and chain, and they fail the moment the asset moves somewhere that does not enforce them.
ERC-3643
Compliance inside the asset
Eligibility and transfer rules are part of the token contract. Every transfer is checked by the asset itself, so the rules are enforced wherever the token is held, with no external gatekeeper to replicate.
DeFi has largely been built around balances, prices and pseudonymous wallets. ERC-3643 assets let applications reason about participants too. That opens the door to eligible liquidity, undercollateralized credit, institutional lending, repo, servicing-aware vaults and markets that were difficult to build around permissionless tokens alone.
How a permissioned asset works.
An ERC-3643 asset combines four capabilities, each written into the token contract itself.
Holder eligibility
Those claims establish whether the wallet is permitted to hold the asset.
Transfer conditions
Each transaction is checked against rules such as jurisdiction, holding limits and lock-ups.
Issuer control
Authorised agents can issue, freeze, recover, transfer or redeem the asset when required.
What ERC-3643 makes possible.
The world's most important assets become internet-native building blocks. Crypto demonstrated what developers can create with open, programmable assets. ERC-3643 extends that design space to funds, credit, equities, bonds and tokenized cash, the assets that underpin the global economy.
Eligible liquidity
Pools and order books that check who is on the other side, so regulated assets trade against verified counterparties.
Credit and collateral
Tokenized holdings that post as productive collateral in permissioned lending, repo and treasury markets.
Open distribution
One asset routed to primary and secondary venues, without re-issuing for each venue.
Programmable servicing
Coupons, dividends, corporate actions and reporting that run against the asset's own record.
New financial applications
Products that reason about participants, not just balances, from servicing-aware vaults to institutional credit.
Open source. Open audit. Open to all.
ERC-3643 is open under permissive licensing and maintained in public by the ERC3643 Association. Read the spec, fork the contracts, run the tests, build to the same target as every other institution on the standard.
Frequently asked questions.
What does ERC-3643 mean?
ERC-3643 is the officially recognised Ethereum token standard for the T-REX Protocol, the name the Ethereum community gave it when it was accepted as a standard.
Is ERC-3643 an alternative to ERC-20?
ERC-3643 is built on ERC-20. It inherits the full ERC-20 interface, so the same wallets, exchanges, custodians, and tooling work natively. What it adds is a compliance layer baked into the standard: onchain identity, eligibility checks, and transfer rules enforced at the token contract itself. It is not a choice between the two, ERC-3643 is the regulated form of ERC-20.
Who maintains ERC-3643?
The ERC3643 Association: a small, non-profit body of experts. The Association curates the specification, maintains the open-source reference implementations, and runs the working groups that propose changes. The wider community of 140+ institutions consumes and contributes to what the Association publishes.
Is ERC-3643 audited?
Yes. The reference contracts have been audited by multiple firms, with public reports. Implementations built on the standard inherit that audit history, then add their own audit on the issuer-specific configuration.
Which blockchains does ERC-3643 support?
ERC-3643 is EVM-native and runs on Ethereum, Polygon, and other EVM chains. Solutions are also in place to run on non-EVM chains such as Casper, Solana, Stellar, and Movement.
Do I have to use T-REX Network to use ERC-3643?
The standard itself is open source, so technically you can deploy an ERC-3643 token on your own. In practice, though, T-REX Network is not something you bolt on after issuance, the Ledger, identity registry, and compliance engine have to govern the asset from the first mint. A standalone deployment stays isolated, it won't share compliance state with the Network, can't travel cross-chain through the Ledger, and isn't reachable through the AppStore's distribution rails. Issuers join the T-REX Network at inception, or stay independent.
Tokenize on the standard the industry is converging on.
Talk to an institutional team that has shipped the standard at scale. We will walk your asset through eligibility, transfer rules, and distribution in one session.