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The On-Chain Layer

The On-Chain Layer is the foundation of CRYMBO's architecture — a protocol-level component that connects directly with Layer 1 and Layer 2 blockchains to enforce compliance where transactions happen.

It ensures native interoperability, real-time transaction visibility, and supports cross-network compliance logic without compromising decentralization.

Purpose​

The On-Chain Layer enables CRYMBO to:

  • Monitor blockchain activity across supported networks
  • Anchor identity and compliance attestations on-chain
  • Execute transaction-level compliance logic (e.g., Travel Rule enforcement, identity-gated execution)
  • Enable real-time Oracle requests and responses using secure smart contract hooks
  • Maintain composability with smart contracts, DeFi protocols, and RWA infrastructure

Supported Blockchains​

CRYMBO currently integrates with:

  • Ethereum (L1, EVM)
  • Polygon (L2, EVM)
  • Solana (L1)
  • Aptos (L1, Move)
  • Arbitrum (L2, EVM)
  • BNB Chain (L1, EVM)
  • Cardano (L1) — Integration
  • XDC (L1) — Integration
  • Base (L2, EVM) — Integration
  • Avalanche (L1) — Integration
  • Bitcoin & UTXO chains (via indexers)
  • Additional networks added regularly

Each integration enables the CRYMBO Oracle to index, validate, and enforce compliance on transactions via validator nodes and on-chain smart contract hooks.

How It Works​

  1. Wallet Activity Detection CRYMBO's chain indexers monitor activity involving registered institutional wallets and Oracle-enabled smart contracts.

  2. Smart Contract Invocation Compliance-related smart contracts (e.g., validateTransaction, checkCompliance) are triggered to enforce rules per jurisdiction and transaction type.

  3. Oracle Engagement The Oracle fetches relevant off-chain identity data, coordinates validator verification, and returns a signed attestation — determining whether the transaction may proceed.

  4. Attestation Publication Compliance attestations are published on-chain — cryptographically signed, verifiable, and immutable.

  5. Transaction Logging All compliance events are recorded and optionally surfaced in the CRYMBO Explorer for regulatory visibility and audit.

Example Use Cases​

Use CaseDescription
Travel RuleWhen a transaction is initiated between two institutions, CRYMBO ensures identity data is exchanged (encrypted) and compliance is attested before execution.
KYC Threshold EnforcementWallets transacting above configured thresholds must have verified identity or the transaction is flagged/halted via Oracle policy logic.
Sanctions ScreeningCRYMBO validates that no party in a transaction appears on sanctioned entity lists before allowing execution.
RWA ComplianceIdentity-gated issuance and transfer of tokenized real-world assets, with eligibility enforced at the transaction level.
DeFi Identity-Aware ExecutionDeFi protocols can query the Oracle to verify counterparty identity before allowing swaps, lending, or liquidity provision.

Developer Access​

To integrate with the On-Chain Layer:

  • Use the CRYMBO Platform to register institutional wallets and publish encryption keys
  • Deploy your transaction contracts with CRYMBO Oracle hooks for pre-execution compliance
  • Use @crymbo/oracle-sdk to validate compliance status before execution
  • Query attestations on-chain to verify compliance in your smart contract logic
// Example: Check compliance before executing a trade
function executeTrade(bytes32 attestationId) external {
    require(crymboOracle.isCompliant(attestationId), "Trade not compliant");
    // Execute trade logic
}

Smart contract templates and SDKs are available in the Integration Guide →

Why It Matters​

Traditional compliance tools rely on centralized databases, slow APIs, and post-trade batch audits. They watch transactions after they happen.

CRYMBO's On-Chain Layer embeds real-time, deterministic, pre-execution compliance directly where transactions happen — at the protocol level. This makes CRYMBO's architecture composable, transparent, and future-proof.

They watch. We enforce before the money moves.

Ready to build on top of the CRYMBO Oracle? Explore CRYMBO Oracle →