ERC-3643 Protocol

The open standard for compliant tokenization of real-world assets.

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What is ERC-3643?

ERC-3643 — code name T-REX (Token for Regulated EXchanges) — is the open Ethereum standard for permissioned tokens. It defines how to issue, manage, and transfer regulated financial assets on EVM blockchains while enforcing compliance, identity, and operational controls directly at the smart-contract layer.

ERC-3643 is the only standard for tokenized securities formally recognized by the Ethereum community as a Final EIP. More than $32 billion in real-world assets have been tokenized using ERC-3643 to date, across funds, equities, bonds, debt instruments, commodities, and cash equivalents.

The standard is maintained by the ERC-3643 Association, a non-profit organization gathering 140+ institutional and blockchain members.

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Where the protocol lives

The ERC-3643 protocol is open-source, audited, and maintained outside of T-REX Network. The authoritative resources are:

Official protocol documentation

erc3643docs.erc3643.org — the full technical reference for the ERC-3643 standard, maintained by the ERC-3643 Association. Covers smart contract architecture, identity registries, claim topics, compliance modules, and integration patterns.

Standard homepage & community

erc3643.org — the ERC-3643 Association website. Member directory, governance, working groups, and standard updates.

Smart contracts source code

github.com/ERC-3643 — official repositories maintained by the Association, including the reference implementation and tooling.

Ethereum standard specification

EIP-3643 — the canonical Ethereum Improvement Proposal, Final status.

Original whitepaper

T-REX Whitepaper — the original technical paper describing the T-REX protocol architecture.

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How ERC-3643 relates to T-REX Network

T-REX Network is built on top of ERC-3643 and extends it with:

• The T-REX Ledger — a canonical book of record for ERC-3643 assets, anchored to Ethereum, coordinated across execution venues. See T-REX Ledger.
• The Compliance Engine — the orchestration layer that enforces identity-aware transfer rules at network scale.
• The T-REX AppStore — official and third-party applications that consume ERC-3643 tokens, including the Token Factory and Identity dApps. See T-REX AppStore.
• Developer tooling — the T-REX Engine API and the T-REX Ledger Testnet for building and testing integrations. See Getting Started.

For details on the standard itself — interfaces, claim topics, compliance modules, transfer logic — refer to the official protocol documentation at erc3643docs.erc3643.org.