From ab5ea8de369e7fe8d612ed6d3e5f38277d16e0b4 Mon Sep 17 00:00:00 2001
From: fiatjaf <fiatjaf@gmail.com>
Date: Thu, 16 Feb 2023 09:29:21 -0300
Subject: [PATCH] another nip57 helper and bump version.

---
 nip57.ts     | 34 ++++++++++++++++++++++++++++++++++
 package.json |  2 +-
 2 files changed, 35 insertions(+), 1 deletion(-)

diff --git a/nip57.ts b/nip57.ts
index e0d50e7..5fd8ca7 100644
--- a/nip57.ts
+++ b/nip57.ts
@@ -71,3 +71,37 @@ export function makeZapRequest({
 
   return zr
 }
+
+export function makeZapReceipt({
+  zapRequest,
+  preimage,
+  bolt11,
+  paidAt
+}: {
+  zapRequest: string
+  preimage: string | null
+  bolt11: string
+  paidAt: Date
+}): EventTemplate {
+  let zr: Event = JSON.parse(zapRequest)
+  let tagsFromZapRequest = zr.tags.filter(
+    ([t]) => t === 'e' || t === 'p' || t === 'a'
+  )
+
+  let zap = {
+    kind: 9735,
+    created_at: Math.round(paidAt.getTime() / 1000),
+    content: '',
+    tags: [
+      ...tagsFromZapRequest,
+      ['bolt11', bolt11],
+      ['description', zapRequest]
+    ]
+  }
+
+  if (preimage) {
+    zap.tags.push(['preimage', preimage])
+  }
+
+  return zap
+}
diff --git a/package.json b/package.json
index 73be3b2..d88fb18 100644
--- a/package.json
+++ b/package.json
@@ -1,6 +1,6 @@
 {
   "name": "nostr-tools",
-  "version": "1.4.1",
+  "version": "1.4.2",
   "description": "Tools for making a Nostr client.",
   "repository": {
     "type": "git",