Add onionbalance Tor frontends to default node lists (#3431)

* Add onionbalance Tor frontends to default node lists

Update the primary Monero and Zcash onion nodes to the new
load-balanced onionbalance frontends, add missing Cake Wallet Tor
nodes for Bitcoin and Litecoin, and use the mempool onion frontend
for Bitcoin fee fetching when Tor is enabled. All Cake Tor nodes are
marked isOfficial so they get the official-node badge.

Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>

* Remove per-instance Zcash Tor #2 node, superseded by onionbalance frontend

Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>

---------

Co-authored-by: Claude Fable 5 <noreply@anthropic.com>

assets/bitcoin_electrum_server_list.yml

@@ -9,6 +9,11 @@
   uri: electrs.cakewallet.com:50001
   isOfficial: true
   label: "Cake Wallet Electrs"
+-
+  uri: cakebtc5pihzt3byjclxfumiwvtxj72auarshrsvmaatmwmr7dj6zyid.onion:50001
+  useSSL: false
+  isOfficial: true
+  label: "Cake Wallet (Tor)"
 -
   uri: fulcrum.sethforprivacy.com:50002
   useSSL: true

assets/litecoin_electrum_server_list.yml

@@ -5,6 +5,11 @@
   isOfficial: true
   isEnabledForAutoSwitching: true
   label: "Cake Wallet"
+-
+  uri: cakeltcnzbdxhk3dhlzxjnnylxbfhhbx2njegaluyh35t7dca35vcnqd.onion:50001
+  useSSL: false
+  isOfficial: true
+  label: "Cake Wallet (Tor)"
 -
   uri: litecoin.stackwallet.com:20063
   useSSL: true

assets/node_list.yml

@@ -7,8 +7,9 @@
   useSSL: true
   isEnabledForAutoSwitching: true
 -
-  label: "Cake Wallet (Onion)"
-  uri: cakexmrl7bonq7ovjka5kuwuyd3f7qnkz6z6s6dmsy3uckwra7bvggyd.onion:18081
+  label: "Cake Wallet (Tor)"
+  uri: cakexmrkbd7ptshw7vfzhzqgg77xgeavdrxm6zbu57lppfkj3fczbrqd.onion:18081
+  isOfficial: true
 -
   label: "Seth For Privacy"
   uri: node.sethforprivacy.com:443

assets/zcash_node_list.yml

@@ -11,10 +11,7 @@
   isEnabledForAutoSwitching: true
   label: "Zec.rocks"
 -
-  uri: 2c4whzg26j6hgjh22rxynj3oig4gm22ga7x74weclujywxye23v3u5id.onion:9067
+  uri: cakezecgh6enylxz3yya52pu4rq3bojy7zfhvnegqkq4qbbpzderjiqd.onion:9067
   useSSL: false
-  label: "Cake Wallet (Tor)"
--
-  uri: bvp2l442g5ogma7rywzahm7eqyhpp3g26n3gvvxeioqn5csio2ir6myd.onion:9067
-  useSSL: false
-  label: "Cake Wallet (Tor #2)"
+  isOfficial: true
+  label: "Cake Wallet (Tor)"

cw_bitcoin/lib/electrum_wallet.dart

@@ -794,7 +794,11 @@ abstract class ElectrumWalletBase
     if (await checkIfMempoolAPIIsEnabled() && type == WalletType.bitcoin) {
       try {
         final response = await ProxyWrapper()
-            .get(clearnetUri: Uri.parse("https://mempool.cakewallet.com/api/v1/fees/recommended"))
+            .get(
+              clearnetUri: Uri.parse("https://mempool.cakewallet.com/api/v1/fees/recommended"),
+              onionUri: Uri.parse(
+                  "http://cakememcninjdqbaub3tp2iswuigxqtdoevnpgzkolmy4gvhrrsub3yd.onion/api/v1/fees/recommended"),
+            )
             .timeout(Duration(seconds: 15));
 
         final result = json.decode(response.body) as Map<String, dynamic>;