From 7219b82f9171130cfcbc38a1e764e7c589c42f0d Mon Sep 17 00:00:00 2001
From: Scroogey-SN <wiring-slit-hubcap@duck.com>
Date: Tue, 18 Mar 2025 11:09:45 +0000
Subject: [PATCH] Add CLN send via CLNRest

---
 wallets/cln/client.js | 38 ++++++++++++++++++++++++++++++++++++++
 wallets/cln/index.js  | 25 ++++++++++++++++++++++++-
 2 files changed, 62 insertions(+), 1 deletion(-)

diff --git a/wallets/cln/client.js b/wallets/cln/client.js
index 97b542b38..875d48d89 100644
--- a/wallets/cln/client.js
+++ b/wallets/cln/client.js
@@ -1 +1,39 @@
+import { fetchWithTimeout } from '@/lib/fetch'
+import { assertContentTypeJson, assertResponseOk } from '@/lib/url'
+
 export * from '@/wallets/cln'
+
+export async function testSendPayment ({ socket, runePay }, { logger, signal }) {
+  // TODO: check rune
+}
+
+export async function sendPayment (bolt11, { socket, runePay }, { logger, signal }) {
+  const url = `https://${socket}/v1/pay`
+
+  const headers = new Headers()
+  headers.set('Content-Type', 'application/json')
+  headers.set('Rune', runePay)
+  // see nodeId in lib/cln.js
+  headers.set('nodeId', '02cb2e2d5a6c5b17fa67b1a883e2973c82e328fb9bd08b2b156a9e23820c87a490')
+
+  const body = new URLSearchParams()
+  body.append('bolt11', bolt11)
+
+  const res = await fetchWithTimeout(url, {
+    method: 'POST',
+    headers,
+    body,
+    signal
+  })
+
+  assertResponseOk(res)
+  assertContentTypeJson(res)
+
+  const payment = await res.json()
+  const preimage = payment.data.payment_preimage
+  if (!preimage) {
+    throw new Error(payment.reason)
+  }
+
+  return preimage
+}
diff --git a/wallets/cln/index.js b/wallets/cln/index.js
index 2e9eec71e..58749dbb0 100644
--- a/wallets/cln/index.js
+++ b/wallets/cln/index.js
@@ -14,7 +14,6 @@ export const fields = [
     placeholder: '55.5.555.55:3010',
     hint: 'tor or clearnet',
     clear: true,
-    serverOnly: true,
     validate: string().socket()
   },
   {
@@ -33,10 +32,13 @@ export const fields = [
     hint: 'must be restricted to method=invoice',
     clear: true,
     serverOnly: true,
+    optional: 'for receiving',
+    requiredWithout: 'runePay',
     validate: string().matches(B64_URL_REGEX, { message: 'invalid rune' })
       .test({
         name: 'rune',
         test: (v, context) => {
+          if (!v) return true
           const decoded = decodeRune(v)
           if (!decoded) return context.createError({ message: 'invalid rune' })
           if (decoded.restrictions.length === 0) {
@@ -52,6 +54,27 @@ export const fields = [
         }
       })
   },
+  {
+    name: 'runePay',
+    label: 'pay rune',
+    type: 'text',
+    placeholder: 'S34KtUW-6gqS_hD_9cc_PNhfF-NinZyBOCgr1aIrark9NCZtZXRob2Q9aW52b2ljZQ==',
+    hint: 'must allow method=pay',
+    clear: true,
+    clientOnly: true,
+    optional: 'for sending',
+    requiredWithout: 'rune',
+    validate: string().matches(B64_URL_REGEX, { message: 'invalid rune' })
+      .test({
+        name: 'runePay',
+        test: (v, context) => {
+          if (!v) return true
+          const decoded = decodeRune(v)
+          if (!decoded) return context.createError({ message: 'invalid rune' })
+          return true
+        }
+      })
+  },
   {
     name: 'cert',
     label: 'cert',