The hosted /pay page now shows the wallet's grin1 Slatepack address (with
a QR and the exact amount) as a payment method alongside the Goblin/Nostr
option. A payer sends the amount from any Grin wallet via the Slatepack or
file method, pastes the S1 into the existing paste box, receives an S2,
and finalizes to complete the payment. Reuses the existing offline
receive_tx flow bound to the invoice token; the Nostr gift-wrap path, the
invoice matcher, and the proof/confirm logic are unchanged. No Tor
listener. The grin1 address is the wallet's stable index-0 address.
2ro
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