Technical deep dive on integrating MoneyGram's fiat on/off ramp with Stellar wallets, covering authentication flows, transaction initiation, USDC settlement, and best practices for handling deposits and withdrawals.
This presentation provides a comprehensive technical guide for wallet developers integrating MoneyGram's fiat on/off ramp service on Stellar. It covers the complete architecture including authentication (omnibus vs individual accounts), transaction initiation for deposits and withdrawals, USDC payment handling with fee and timeout strategies, and transaction completion. Key topics include client domain attribution, memo usage for transaction routing, Horizon API integration for streaming payments, and error handling. The speaker emphasizes using Stellar SDKs to simplify complexity and references the SEP-24 standard, the SDF's reference server, and demo wallet resources. Q&A addresses agent network education, cross-country cash flows, onboarding timelines, and geographic availability of cash-in and cash-out services.