Overview
The Payments domain covers institutional cash movement scenarios including payouts, payment-versus-payment (PvP) settlements, delivery-versus-payment (DvP) cash legs, and workflows requiring selective disclosure to stakeholders.Key Focus: Stakeholder-only visibility with selective disclosure, ISO/SWIFT linkage when needed, and optimized latency/finality/costs on target networks.
Core Requirements
Privacy
Transaction details visible only to authorized stakeholders, protecting commercial terms and workflow memos
Compliance
Selective disclosure mechanisms for regulatory oversight without compromising counterparty privacy
Finality
Measure and optimize settlement latency on target L2 or app-chain infrastructure
Interoperability
ISO 20022 messaging integration for legacy payment rail connectivity
Technical Considerations
Avoiding HTLC Brittleness
Avoiding HTLC Brittleness
Hash Time-Locked Contracts (HTLCs) introduce timing dependencies and failure modes that are problematic for institutional settlements. Prefer ERC-7573 or zk-SPV patterns for atomic operations.
L2 vs App-Chain Trade-offs
L2 vs App-Chain Trade-offs
Evaluate latency, finality guarantees, and gas costs on target networks. App-chains offer predictable performance but require bridge security. L2s provide Ethereum security but may have variable throughput.
Encrypted Off-chain Audit Logs
Encrypted Off-chain Audit Logs
For workflows requiring comprehensive audit trails without on-chain data exposure, combine L2 privacy with encrypted off-chain storage and selective key disclosure.
Primary Use Cases
Private Stablecoins for Institutional Payments
Confidential stablecoin transfers between institutional counterparties with regulatory reporting
Shortest-Path Patterns
These patterns provide proven implementation approaches for common payment scenarios:Private Stablecoin Shielded Payments
Zero-knowledge proofs for confidential stablecoin transfers
Private PvP via ERC-7573
Atomic payment-versus-payment with privacy preservation
Atomic DvP via ERC-7573
Delivery-versus-payment settlements with cryptographic guarantees
L2 + Encrypted Off-chain Audit
Layer-2 privacy with comprehensive audit trail management
Private ISO 20022 Messaging
Integration with legacy payment messaging standards
Adjacent Vendors
Chainlink ACE
Cross-chain atomic settlements with privacy
Kaleido Paladin
Enterprise privacy orchestration layer
Aztec L2
Zero-knowledge rollup for private payments
Related Domains
Trading
DvP cash leg settlements in trade execution workflows
Identity & Compliance
KYC/AML verification required before payment authorization
Payment workflows typically require coordination with Custody domain for secure key management and Identity & Compliance for transaction authorization.