Tokenization — CityZeen® Smart Contracts
Infrastructure / Tokenization

11 smart contracts.
Source-verified. Test-complete.

ERC-3643 T-REX · GeoStamp ERC-721 · ONCHAINID Bridge. 32/32 tests passing. Testnet broadcast Q3 2026. Base mainnet production Q4 2026.

32 / 32 tests passing Foundry · Solidity 0.8.24 Audit pending · Q3 2026

The stack.

Eleven role-restricted, pausable, fuzz-tested contracts. Source-verified locally with Foundry. Testnet broadcast and third-party audit scheduled for Q3 2026; on-chain addresses publish here at broadcast.

01Attestation

AttestationRegistry

Role-gated · Pausable
Source-verified Audit pending · Q3 2026
02ERC-3643 T-REX

CityZeenClaimTopicsRegistry

Claim topics · T-REX core
Source-verified Audit pending · Q3 2026
03ERC-3643 T-REX

CityZeenTrustedIssuersRegistry

Trusted issuers · T-REX core
Source-verified Audit pending · Q3 2026
04ERC-3643 T-REX

IdentityRegistryStorage

Identity storage · T-REX core
Source-verified Audit pending · Q3 2026
05ERC-3643 T-REX

CityZeenIdentityRegistry

Identity registry · T-REX core
Source-verified Audit pending · Q3 2026
06ERC-3643 T-REX

CityZeenComplianceModule

Transfer compliance · MiFID II rails
Source-verified Audit pending · Q3 2026
07ERC-3643

CityZeenSecurityToken

Security token · Permissioned transfers
Source-verified Audit pending · Q3 2026
08ERC-721 · GeoStamp

GeoStampCertificate

Geo-attested NFT · Custody proof
Source-verified Audit pending · Q3 2026
09ONCHAINID

CityZeenIdentityFactory

Identity deployment factory · ERC-734/735
Source-verified Audit pending · Q3 2026
10ERC-20 Wrapper

CityZeenWrapperFactory

Liquidity wrapper · Compliance-boundary preserved
Source-verified Audit pending · Q3 2026
11ONCHAINID · Sumsub Bridge

Identity

ONCHAINID instance · KYC claim issuance target
Source-verified Audit pending · Q3 2026
Roadmap

Source today.
Mainnet Q4 2026.

Contracts are chain-agnostic EVM, source-verified and fuzz-tested locally with Foundry. Testnet broadcast to Polygon Amoy is scheduled for Q3 2026 alongside third-party audit. Base mainnet production deployment in Q4 2026, with administrative roles held by a Safe 3-of-5 multisig from day one.

  • Production ChainBase mainnet · Q4 2026
  • Testnet BroadcastPolygon Amoy · Q3 2026
  • Admin ControlSafe 3-of-5 multisig
  • Test Coverage32 / 32 passing · forge test -vvv
SumsubONCHAINID
Identity Bridge

KYC claims, written on-chain.

Sumsub-verified investor identities are bridged to ERC-734/735 ONCHAINID instances via the Identity Factory. The Compliance Module reads these claims at transfer time — eligibility is deterministic, auditable, and enforced at contract level, not at the application layer.

Sumsub (off-chain KYC/KYB) → Trusted Issuer signs claim → ONCHAINID instance stores claim → IdentityRegistry resolves → ComplianceModule permits transfer.

Eleven contracts.
One regulated rail.

Issue, identify, settle, wrap — the full institutional tokenization path is source-complete and audit-bound. Testnet Q3 2026. Base mainnet Q4 2026.

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CSSF Luxembourg · MiFID II · AIFMD · SFDR