tests and eurc

shared/interfaces/Catcrafts.Shared-Model.cppm

@@ -344,6 +344,24 @@ export Financials LoadFinancials(std::string_view json) {
 // Everything the order status page needs to render — a projection of the
 // server's order record, not the record itself. The renderer stays a pure
 // function in Shared; the server owns storage and fills this in.
+// Self-hosted crypto payment instructions, rendered on the order page when the
+// rail has no hosted checkout to send the buyer to. Everything is pre-formatted
+// text: the renderer should not know what a chain id or a token decimal is, any
+// more than it knows where ECB rates come from.
+export struct OrderCryptoPay {
+    std::string address;       // where the money goes, "0x…"
+    std::string amount;        // decimal EURC amount ("570.43") — equals the
+                               // euro total; EURC is euro-denominated at par
+    std::int64_t minutesLeft = 0;  // until the window closes; <= 0 = closed
+    struct Chain {
+        std::string name;      // "base"
+        std::string contract;  // token contract, shown so the buyer can verify
+        std::string link;      // EIP-681 wallet URI; empty = no link rendered
+        std::string note;      // short hint ("lowest fees"), may be empty
+    };
+    std::vector<Chain> chains; // in display order — first is the recommended one
+};
+
 export struct OrderView {
     std::string token;        // the capability that IS the URL — never logged
     std::string reference;    // short human code, quoted in the bank transfer
@@ -363,6 +381,9 @@ export struct OrderView {
     std::int64_t shippingMinor = 0;
     std::int64_t totalMinor = 0;
     bool vatIncluded = false;
+    // Present only for an awaiting order on a rail without a hosted checkout;
+    // the page then renders instructions instead of a "resume payment" button.
+    std::optional<OrderCryptoPay> cryptoPay;
 };
 
 // An entry on the demos page.