GRU technical model
The technical reference stack ties institutional policy to verifiable operating evidence: ISO 20022 payment references, OMNL journal entries, HYBX workflow state, settlement contracts, PMM liquidity pools, payload hashes, and public transparency endpoints deployed on Chain 138.
Reference architecture
- Workflow orchestration — HYBX state records for approvals, counterparty steps, reconciliation, and exceptions
- Payment spine — ISO 20022 references and bank acknowledgements for regulated settlement execution
- Consensus — Absu (Hyperledger Besu fork) with QBFT for settlement-grade finality on Chain 138
- Settlement tokens — cUSDT treasury / government bond exposure and cUSDC cash-tokenized electronic money for institutional settlement
- Gold layer — cXAUC and cXAUT tokens backed 1:1 by troy ounce gold claims
- PMM pools — DODO Proactive Market Maker pools for on-chain liquidity (6-second tick mesh automation)
- Institutional ledger — Apache Fineract IPSAS-compliant double-entry bookkeeping (OMNL tenant)
- Evidence layer — reconciliation packets, payload hashes, and optional Chain 138 attestation for audit trail integrity
Deployed contracts (Chain 138)
Verified contract addresses on Chain 138. All addresses can be inspected on the block explorer.
| Contract | Address | Description |
|---|---|---|
| cUSDT | 0x93E66202…da7f22 | Compliant USD treasury / government bond exposure — 6 decimals |
| cUSDC | 0xf22258f5…fa640b | Compliant USD cash-tokenized electronic money — 6 decimals |
| cXAUC | 0x290E52a8…70EC6b | Gold-backed token — 1 token = 1 troy oz Au |
| cXAUT | 0x94e408E2…7dC96E | Gold-backed token — 1 token = 1 troy oz Au |
| DODOPMMIntegration | 0x5BDc62f1…6Ee72d | PMM integration router |
| PMM Pool (cUSDT/cUSDC) | 0xff8d3b8f…9C0849 | Primary GRU liquidity |
| PMM Pool (cUSDT/USDT) | 0x6fc60DED…b99D71 | cUSDT mint/redeem |
| PMM Pool (cUSDC/USDC) | 0x9f74Be42…510263 | cUSDC mint/redeem |
Deployer: 0x4A666F96fC8764181194447A7dFdb7d471b301C8
Wallet integrations
- MetaMask Snap — browser wallet integration for swaps, bridge, and pricing on Chain 138
- Ledger Live — hardware wallet integration for cold storage and institutional signing
Developers
OpenAPI contracts and SDKs are linked from developers.d-bis.org. Trust anchors for this apex domain are described under Security and /.well-known/trust.json. Full infrastructure inventory is on the Infrastructure page.