PayFlow is a high-availability banking gateway proxy written in Go, resolving transaction failures by auto-switching gateways.
"PayFlow intercepts Stripe, Adyen, and PayPal checkouts, selecting the provider with the lowest fees and highest success rates."
Smart Routing
Leveraging transactional history stored in Redis cache clusters, the router runs multi-armed bandit algorithms to detect down times in Stripe or Adyen endpoints, re-routing payments to active fallbacks without dropping user checkout sessions.
System Architecture
[CHECKOUT GATEWAY INGESTION]
Client Billing Form SDK integrations (Stripe, Paypal elements)
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[GO HIGH-FREQUENCY ROUTER]
Golang Router / Redis Realtime Merchant Metrics / Rate Arbitrage Engine
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[EXTERNAL BANK GATEWAYS]
Stripe / Adyen / Paypal Merchant Bank APIs
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