Stellar payment-link / invoicing guide

[truthixify]

Tier: M (2-4 days) Type: writing

Context

Demo wave shipped payment-link generation. Real apps want this primitive. Document the URL schema, signing patterns (to prevent tampering), and integration recipes.

Scope

Write docs/guides/stellar-payment-links.mdx:

• URL schema for Wraith payment links (https://your-domain/pay?to=alice.wraith&amount=...&memo=...&exp=...)
• Optional signature for tamper protection
• Deep-linking into your own app
• QR code generation patterns
• Expiry handling
• Demo's reference implementation walkthrough (link to demo repo)
• Webhook receiver for confirmed payments

Acceptance criteria

• Page committed
• Working example URL
• Reference implementation code excerpts
• Linked from demo + SDK Stellar

Files to start with

• New: docs/guides/stellar-payment-links.mdx
• demo/src/components/StellarPaymentLink.tsx