ERC-3643 Developers

ERC-3643, also known as the T-REX (Token for Regulated EXchanges) protocol, is an Ethereum token standard specifically designed for permissioned and regulated tokens. It includes a built-in identity framework (ONCHAINID), modular compliance modules, and a claim-based investor permissioning system.

ERC-3643 is the leading standard for security tokens, tokenized funds, RWA tokenization, and regulated digital securities because it was designed from the ground up for compliance, transfer restrictions, and institutional requirements. It is maintained by the T-REX Alliance and widely adopted by regulated platforms globally.

What is ERC-3643 used for?

ERC-3643 is used for any application requiring permissioned, regulated token transfers — primarily security tokens, tokenized funds, RWA tokenization, employee equity tokens, and other regulated financial instruments. It enforces compliance rules on every token transfer at the smart contract level.

How does ERC-3643 enforce compliance?

ERC-3643 uses a modular compliance contract system where each token is linked to a compliance contract that checks a set of rules (country restrictions, investor limits, supply caps, etc.) on every transfer. Investors must hold a valid on-chain identity (ONCHAINID) with required claims to receive or send tokens.

Is ERC-3643 an official Ethereum standard?

ERC-3643 is an Ethereum Request for Comment (ERC) that has been formalized and is maintained by the T-REX Alliance, which includes many institutional tokenization platforms. It is widely used in production but is not an 'official' Ethereum Foundation standard in the same way ERC-20 is.