feat: check melt quote

Author: StringNick

src/core/mint/mint.zig

@@ -11,6 +11,7 @@ const zul = @import("zul");
 const RWMutex = helper.RWMutex;
 const MintInfo = core.nuts.MintInfo;
 const MintQuoteBolt11Response = core.nuts.nut04.MintQuoteBolt11Response;
+const MeltQuoteBolt11Response = core.nuts.nut05.MeltQuoteBolt11Response;
 const MintQuoteState = core.nuts.nut04.QuoteState;
 const MintKeySet = core.nuts.MintKeySet;
 const CurrencyUnit = core.nuts.CurrencyUnit;
@@ -937,6 +938,16 @@ pub const Mint = struct {
             .signatures = promises.items,
         };
     }
+
+    /// Check melt quote status
+    pub fn checkMeltQuote(self: *Mint, gpa: std.mem.Allocator, quote_id: [16]u8) !MeltQuoteBolt11Response {
+        const quote = try self.localstore
+            .value
+            .getMeltQuote(gpa, quote_id) orelse return error.UnknownQuote;
+        errdefer quote.deinit();
+
+        return MeltQuoteBolt11Response.fromMeltQuote(quote);
+    }
 };
 
 /// Generate new [`MintKeySetInfo`] from path

src/router/router.zig

@@ -50,6 +50,7 @@ pub fn createMintServer(
     router.get("/v1/keysets", router_handlers.getKeysets, .{});
     router.get("/v1/keys/:keyset_id", router_handlers.getKeysetPubkeys, .{});
     router.get("/v1/mint/quote/bolt11/:quote_id", router_handlers.getCheckMintBolt11Quote, .{});
+    router.get("/v1/melt/quote/bolt11/:quote_id", router_handlers.getCheckMeltBolt11Quote, .{});
     router.post("/v1/checkstate", router_handlers.postCheck, .{});
     router.get("/v1/info", router_handlers.getMintInfo, .{});
 

src/router/router_handlers.zig

@@ -48,6 +48,24 @@ pub fn getCheckMintBolt11Quote(
     return try res.json(quote, .{});
 }
 
+pub fn getCheckMeltBolt11Quote(
+    state: MintState,
+    req: *httpz.Request,
+    res: *httpz.Response,
+) !void {
+    const quote_id_hex = req.param("quote_id") orelse return error.ExpectQuoteId;
+
+    const quote_id = try zul.UUID.parse(quote_id_hex);
+    const quote = state
+        .mint
+        .checkMeltQuote(res.arena, quote_id.bin) catch |err| {
+        std.log.debug("Could not check melt quote {any}: {any}", .{ quote_id, err });
+        return error.CheckMintQuoteFailed;
+    };
+
+    return try res.json(quote, .{});
+}
+
 pub fn postCheck(
     state: MintState,
     req: *httpz.Request,