From 9b2d46b4fd9d423566145db53be65e041f90bce5 Mon Sep 17 00:00:00 2001
From: Thomas Farstrike <thomasverstreken@protonmail.com>
Date: Sun, 25 May 2025 12:59:10 +0200
Subject: [PATCH] add wallet.py

---
 .../assets/wallet.py                          | 123 ++++++++++++++++++
 1 file changed, 123 insertions(+)
 create mode 100644 internal_filesystem/apps/com.lightningpiggy.displaywallet/assets/wallet.py

diff --git a/internal_filesystem/apps/com.lightningpiggy.displaywallet/assets/wallet.py b/internal_filesystem/apps/com.lightningpiggy.displaywallet/assets/wallet.py
new file mode 100644
index 00000000..86483b99
--- /dev/null
+++ b/internal_filesystem/apps/com.lightningpiggy.displaywallet/assets/wallet.py
@@ -0,0 +1,123 @@
+
+class Wallet:
+
+    # These values could be loading from a cache.json file at __init__
+    last_known_balance = 0
+    last_known_balance_timestamp = 0
+
+    def __init__(self):
+        pass
+
+    def __str__(self):
+        if isinstance(self, LNBitsWallet):
+            return "LNBitsWallet"
+        elif isinstance(self, NWCWallet):
+            return "NWCWallet"
+
+
+class LNBitsWallet(Wallet):
+
+    def __init__(self, lnbits_url, lnbits_readkey):
+        super().__init__()
+        self.lnbits_url = lnbits_url
+        self.lnbits_readkey = lnbits_readkey
+
+    def fetch_balance_thread():
+        print("fetch_balance_thread")
+        walleturl = self.lnbits_url + "/api/v1/wallet"
+        headers = {
+            "X-Api-Key": self.lnbits_readkey,
+        }
+        try:
+            response = requests.get(self.lnbits_url, timeout=10, headers=headers)
+        except Exception as e:
+            print("GET request failed:", e)
+            #lv.async_call(lambda l: please_wait_label.set_text(f"Error downloading app index: {e}"), None)
+        if response and response.status_code == 200:
+            print(f"Got response text: {response.text}")
+            response.close()
+
+    def start_refresh_balance(self):
+        _thread.stack_size(mpos.apps.good_stack_size())
+        _thread.start_new_thread(self.fetch_balance_thread, ())
+
+class NWCWallet(Wallet):
+
+    def __init__(self, nwc_url):
+        super().__init__()
+        self.nwc_url = nwc_url
+        nwc_data = parse_nwc_url(nwc_url)
+        self.relay = nwc_data['relay']
+        self.wallet_pubkey = nwc_data['pubkey']
+        self.secret = nwc_data['secret']
+        self.lud16 = nwc_data['lud16']
+        print(f"DEBUG: Parsed NWC data - Relay: {relay}, Pubkey: {wallet_pubkey}, Secret: {secret}, lud16: {lud16}")
+        # TODO: open connection to relay, subscribe to updates
+
+    def start_refresh_balance(self) :
+        # TODO: make sure connected to relay (otherwise connect) and fetch balance
+        pass
+
+    def parse_nwc_url(self, nwc_url):
+        """Parse Nostr Wallet Connect URL to extract pubkey, relay, secret, and lud16."""
+        print(f"DEBUG: Starting to parse NWC URL: {nwc_url}")
+        try:
+            # Remove 'nostr+walletconnect://' or 'nwc:' prefix
+            if nwc_url.startswith('nostr+walletconnect://'):
+                print(f"DEBUG: Removing 'nostr+walletconnect://' prefix")
+                nwc_url = nwc_url[22:]
+            elif nwc_url.startswith('nwc:'):
+                print(f"DEBUG: Removing 'nwc:' prefix")
+                nwc_url = nwc_url[4:]
+            else:
+                print(f"DEBUG: No recognized prefix found in URL")
+                raise ValueError("Invalid NWC URL: missing 'nostr+walletconnect://' or 'nwc:' prefix")
+            
+            print(f"DEBUG: URL after prefix removal: {nwc_url}")
+    
+            # Split into pubkey and query params
+            parts = nwc_url.split('?')
+            pubkey = parts[0]
+            print(f"DEBUG: Extracted pubkey: {pubkey}")
+    
+            # Validate pubkey (should be 64 hex characters)
+            if len(pubkey) != 64 or not all(c in '0123456789abcdef' for c in pubkey):
+                raise ValueError("Invalid NWC URL: pubkey must be 64 hex characters")
+    
+            # Extract relay, secret, and lud16 from query params
+            relay = None
+            secret = None
+            lud16 = None
+            if len(parts) > 1:
+                print(f"DEBUG: Query parameters found: {parts[1]}")
+                params = parts[1].split('&')
+                for param in params:
+                    if param.startswith('relay='):
+                        relay = param[6:] # TODO: urldecode because the relay might have %3A%2F%2F etc
+                        print(f"DEBUG: Extracted relay: {relay}")
+                    elif param.startswith('secret='):
+                        secret = param[7:]
+                        print(f"DEBUG: Extracted secret: {secret}")
+                    elif param.startswith('lud16='):
+                        lud16 = param[6:]
+                        print(f"DEBUG: Extracted lud16: {lud16}")
+            else:
+                print(f"DEBUG: No query parameters found")
+    
+            if not pubkey or not relay or not secret:
+                raise ValueError("Invalid NWC URL: missing required fields (pubkey, relay, or secret)")
+    
+            # Validate secret (should be 64 hex characters)
+            if len(secret) != 64 or not all(c in '0123456789abcdef' for c in secret):
+                raise ValueError("Invalid NWC URL: secret must be 64 hex characters")
+    
+            return {
+                'relay': relay,
+                'pubkey': pubkey,
+                'secret': secret,
+                'lud16': lud16
+            }
+        except Exception as e:
+            print(f"DEBUG: Error parsing NWC URL: {e}")
+            sys.exit(1)
+