Reworked for simplified flake

modules/bitcoind/default.nix

@@ -0,0 +1,34 @@
+{ config, specialConfig, lib, pkgs, ... }:
+{
+    #################################
+    # Bitcoin Core (bitcoind)
+    #################################
+    services.bitcoind = {
+      enable = true;
+      address = "0.0.0.0";
+      port = 23002;
+      listen = true;
+      listenWhitelisted = true;
+      whitelistedPort = 8335;
+      # dataDir = "/var/lib/bitcoind";
+      rpc = {
+        address = "0.0.0.0";
+        port = 8332;
+        threads = 4;
+        allowip = [
+          "0.0.0.0"
+        ];
+      };
+      regtest = false;
+      # network = "regtest"; # or "mainnet"
+      dataDirReadableByGroup = false;
+      disablewallet = null;
+      dbCache = 4000;
+      prune = 10000;
+      txindex = true;
+      zmqpubrawblock = "tcp://0.0.0.0:28332";
+      zmqpubrawtx = "tcp://0.0.0.0:28333";
+      user = "bitcoind";
+      group = "bitcoind";
+    };
+}