ecash receive

4 files changed, 51 insertions, 0 deletions

diff --git a/index.ts b/index.ts
index 569d6dfe..97b3a71d 100644
--- a/index.ts
+++ b/index.ts
@@ -131,6 +131,7 @@ app.post("/cash", ecash.save);
 app.post("/claim", auth, ecash.claim);
 app.post("/mint", auth, ecash.mint);
 app.post("/melt", auth, ecash.melt);
+app.post("/ecash/:id", ecash.receive);
 
 app.post("/echo", (req, res) => {
   console.log("echo", req.body);
diff --git a/lib/ecash.ts b/lib/ecash.ts
index 7c44bec0..1a214b46 100644
--- a/lib/ecash.ts
+++ b/lib/ecash.ts
@@ -6,11 +6,16 @@ import {
   CashuMint,
   CashuWallet,
   MintQuoteState,
+  PaymentRequest,
+  PaymentRequestTransport,
+  PaymentRequestTransportType,
   getDecodedToken,
   getEncodedToken,
   getEncodedTokenV4,
 } from "@cashu/cashu-ts";
+import { v4 } from "uuid";
 
+const { URL } = process.env;
 const m = new CashuMint(config.mintUrl);
 const w = new CashuWallet(m);
 
@@ -92,3 +97,21 @@ export async function init(amount = 100000) {
     console.log(e);
   }
 }
+
+export function request(uuid, amount, memo) {
+  const target = `${URL}/ecash/${uuid}`;
+  const tags = [["n", "17"]];
+
+  const { POST: type } = PaymentRequestTransportType;
+  const transport = [{ type, target, tags }];
+  const unit = "sat";
+
+  return new PaymentRequest(
+    transport,
+    uuid,
+    amount,
+    unit,
+    config.mintUrl,
+    memo,
+  ).toEncodedRequest();
+}
diff --git a/lib/invoices.ts b/lib/invoices.ts
index 30ae8402..5e59fd83 100644
--- a/lib/invoices.ts
+++ b/lib/invoices.ts
@@ -1,5 +1,6 @@
 import config from "$config";
 import { db, g, s } from "$lib/db";
+import { request } from "$lib/ecash";
 import ln from "$lib/ln";
 import { types } from "$lib/payments";
 import { emit } from "$lib/sockets";
@@ -101,6 +102,9 @@ export const generate = async ({ invoice, user }) => {
     text = bip21(hash, invoice);
   } else if (type === types.internal) {
     hash = id;
+  } else if (type === types.ecash) {
+    hash = id;
+    text = request(id, amount, memo);
   } else {
     fail(`unrecognized type ${type}`);
   }
diff --git a/routes/ecash.ts b/routes/ecash.ts
index 6aac01a8..a807cdb5 100644
--- a/routes/ecash.ts
+++ b/routes/ecash.ts
@@ -4,6 +4,7 @@ import { err, l } from "$lib/logging";
 import { credit, debit, types } from "$lib/payments";
 import { emit } from "$lib/sockets";
 import { bail, fail } from "$lib/utils";
+import { getEncodedToken } from "@cashu/cashu-ts";
 import { v4 } from "uuid";
 const { ecash: type } = types;
 
@@ -140,4 +141,26 @@ export default {
       bail(res, e.message);
     }
   },
+
+  async receive(req, res) {
+    try {
+      const { payload } = req.body;
+      const { id, proofs, mint, memo } = payload;
+      const { uid: ref } = await g(`invoice:${id}`);
+
+      const amount = await claim(
+        getEncodedToken({
+          mint,
+          proofs,
+        }),
+      );
+
+      await credit({ hash: id, amount, memo, ref, type });
+
+      res.send({ id });
+    } catch (e) {
+      err(e.message);
+      bail(res, e.message);
+    }
+  },
 };