Blueprints
Implementation blueprints and architectural patterns for embedded crypto accounts
Blueprints
This section provides detailed implementation blueprints and architectural patterns for building robust embedded crypto account systems. Each blueprint includes proven designs, security considerations, and scalability guidelines.
Who this helps
Products needing custodial wallets + card-to-USDC checkout.
Apps that must offload KYC while keeping a native UX.
Platforms that need per-user/per-entity balances and webhooks.
Operators who want hosted Payment Links first, embed later.
Teams that need clear, REST-verifiable money-movement events.
How to choose
Hosted Payment Link: fastest. No front-end changes; redirect to track.swipelux.com. Good for MVP, external pages, or deep links.
Embedded SDK (widget/modal): best UX. Opens in-page; reuses saved KYC/payment to cut friction.
Server-led transfer: you call POST /v1/transfers then send user to sourceInstructions.signedUrl. Gives you IDs early for reliable tracking and REST re-verification.
Archetypes
End-User Custodial Wallet + On-Ramp Checkout
Create wallets, route to hosted/embedded checkout, show USDC balance.
Programmatic Payouts to User Wallets
Spin customers, initiate card→USDC top-ups per user, show balances.
Embedded Checkout for Digital Goods
In-app modal or link; saved KYC/payment reduces drop-off.
Campaign / Project Collections & Reconciliation
Auto-create a customer per campaign; track balances via REST.
Two-Sided Marketplace Escrow-Like Flows
Hold fulfillment until transfer.completed; per-user wallets.
Merchant/Partner Settlement in Stablecoins
Issue wallets to partners; route them to on-ramp; read balances.
In-App Micro-Purchases with Hosted Checkout
One-click modal/link; Apple Pay when available.
Multi-Entity Sub-Accounts & Reporting
Model entities as Customers; poll balances; reconcile via webhooks.
End-User Custodial Wallet + On-Ramp Checkout – Use case
Detailed implementation example of custodial wallets with on-ramp checkout for a digital media platform.