Upgrade to cashu-ts v4 and drop unused deps.

Adapt amount handling for v4 Amount objects, replace axios/uuid with fetch and crypto.randomUUID, and remove dead helpers.

Co-authored-by: Cursor <cursoragent@cursor.com>

components/lightning.js

@@ -1,6 +1,21 @@
-const axios = require('axios');
 const bolt11 = require('bolt11');
 
+/**
+ * GET a JSON resource with a 10s timeout using native fetch
+ */
+async function fetchJson(url) {
+  const response = await fetch(url, {
+    signal: AbortSignal.timeout(10000),
+    headers: { 'User-Agent': 'Cashu-Redeem-API/1.0.0' }
+  });
+
+  if (!response.ok) {
+    throw new Error(`HTTP ${response.status}: ${response.statusText}`);
+  }
+
+  return response.json();
+}
+
 class LightningComponent {
   constructor() {
     this.allowedDomains = process.env.ALLOW_REDEEM_DOMAINS 
@@ -82,17 +97,8 @@ class LightningComponent {
    */
   async fetchLNURLpResponse(lnurlpUrl) {
     try {
-      const response = await axios.get(lnurlpUrl, {
-        timeout: 10000,
-        headers: { 'User-Agent': 'Cashu-Redeem-API/1.0.0' }
-      });
+      const data = await fetchJson(lnurlpUrl);
 
-      if (response.status !== 200) {
-        throw new Error(`HTTP ${response.status}: ${response.statusText}`);
-      }
-
-      const data = response.data;
-      
       if (data.status === 'ERROR') {
         throw new Error(data.reason || 'LNURLp endpoint returned error');
       }
@@ -103,7 +109,8 @@ class LightningComponent {
 
       return data;
     } catch (error) {
-      if (error.code === 'ECONNREFUSED' || error.code === 'ENOTFOUND') {
+      const code = error.cause?.code;
+      if (code === 'ECONNREFUSED' || code === 'ENOTFOUND') {
         throw new Error('Unable to connect to Lightning address provider');
       }
       throw new Error(`LNURLp fetch failed: ${error.message}`);
@@ -122,17 +129,8 @@ class LightningComponent {
         url.searchParams.set('comment', comment.substring(0, 144));
       }
 
-      const response = await axios.get(url.toString(), {
-        timeout: 10000,
-        headers: { 'User-Agent': 'Cashu-Redeem-API/1.0.0' }
-      });
+      const data = await fetchJson(url.toString());
 
-      if (response.status !== 200) {
-        throw new Error(`HTTP ${response.status}: ${response.statusText}`);
-      }
-
-      const data = response.data;
-      
       if (data.status === 'ERROR') {
         throw new Error(data.reason || 'Invoice generation failed');
       }
@@ -226,23 +224,6 @@ class LightningComponent {
     }
   }
 
-  /**
-   * Decode Lightning invoice (basic parsing)
-   */
-  parseInvoice(bolt11Invoice) {
-    try {
-      if (!bolt11Invoice.toLowerCase().startsWith('lnbc') && !bolt11Invoice.toLowerCase().startsWith('lntb')) {
-        throw new Error('Invalid Lightning invoice format');
-      }
-      return {
-        bolt11: bolt11Invoice,
-        network: bolt11Invoice.toLowerCase().startsWith('lnbc') ? 'mainnet' : 'testnet'
-      };
-    } catch (error) {
-      throw new Error(`Invoice parsing failed: ${error.message}`);
-    }
-  }
-
   /**
    * Verify that a Lightning invoice is valid and for the expected amount
    */