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Flow

  1. Customer opens https://pay.meum.io/pay/{publicId}
  2. Customer views link details (amount, store, description)
  3. Customer selects payment token and enters refund address
  4. System calls POST /v1/public/payment-links/{publicId}/checkout
  5. Invoice is created; customer redirected to https://pay.meum.io/{invoiceId}?src=pl
  6. Standard checkout and payment flow continues

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Public API (checkout creation)

curl -X POST https://api.meum.io/v1/public/payment-links/pay_demo_123/checkout \
  -H "Content-Type: application/json" \
  -d '{
    "origin_asset": "eth",
    "refund_to": "0x742d35Cc6634C0532925a3b844Bc9e7595f0bEb",
    "amount": "25.00"
  }'
The amount field is required for customer-amount links; omit for fixed-amount links.