add nix-bitcoin pkgs namespace

Not polluting the main pkgs namespace with internal pkgs makes it
easier to integrate the nix-bitcoin modules into a larger config.

Also, by overriding the nix-bitcoin namespace, users can now easily set the
packages used by services that offer no explicit `package` option, like `clightning`.

modules/bitcoind.nix

@@ -69,7 +69,7 @@ in {
 
       package = mkOption {
         type = types.package;
-        default = pkgs.blockchains.bitcoind;
+        default = pkgs.nix-bitcoin.bitcoind;
         defaultText = "pkgs.blockchains.bitcoind";
         description = "The package providing bitcoin binaries.";
       };

modules/clightning.nix

@@ -71,7 +71,7 @@ in {
 
     systemd.services.clightning = {
       description = "Run clightningd";
-      path  = [ pkgs.blockchains.bitcoind ];
+      path  = [ pkgs.nix-bitcoin.bitcoind ];
       wantedBy = [ "multi-user.target" ];
       requires = [ "bitcoind.service" ];
       after = [ "bitcoind.service" ];
@@ -87,7 +87,7 @@ in {
         '';
       serviceConfig = {
         PermissionsStartOnly = "true";
-        ExecStart = "${pkgs.clightning}/bin/lightningd --lightning-dir=${cfg.dataDir}";
+        ExecStart = "${pkgs.nix-bitcoin.clightning}/bin/lightningd --lightning-dir=${cfg.dataDir}";
         User = "clightning";
         Restart = "on-failure";
         RestartSec = "10s";

modules/electrs.nix

@@ -74,7 +74,7 @@ in {
       preStart = ''
         mkdir -m 0770 -p ${cfg.dataDir}
         chown -R '${cfg.user}:${cfg.group}' ${cfg.dataDir}
-        echo "${pkgs.electrs}/bin/electrs -vvv ${index-batch-size} ${jsonrpc-import} --timestamp --db-dir ${cfg.dataDir} --daemon-dir /var/lib/bitcoind --cookie=${config.services.bitcoind.rpcuser}:$(cat /secrets/bitcoin-rpcpassword) --electrum-rpc-addr=127.0.0.1:${toString cfg.port}" > /run/electrs/startscript.sh
+        echo "${pkgs.nix-bitcoin.electrs}/bin/electrs -vvv ${index-batch-size} ${jsonrpc-import} --timestamp --db-dir ${cfg.dataDir} --daemon-dir /var/lib/bitcoind --cookie=${config.services.bitcoind.rpcuser}:$(cat /secrets/bitcoin-rpcpassword) --electrum-rpc-addr=127.0.0.1:${toString cfg.port}" > /run/electrs/startscript.sh
         '';	
       serviceConfig = rec {
         RuntimeDirectory = "electrs";

modules/lightning-charge.nix

@@ -31,7 +31,7 @@ in {
       after = [ "clightning.service" ];
       serviceConfig = {
           EnvironmentFile = "/secrets/lightning-charge-api-token";
-          ExecStart = "${pkgs.lightning-charge}/bin/charged -l ${config.services.clightning.dataDir} -d ${config.services.clightning.dataDir}/lightning-charge.db";
+          ExecStart = "${pkgs.nix-bitcoin.lightning-charge}/bin/charged -l ${config.services.clightning.dataDir} -d ${config.services.clightning.dataDir}/lightning-charge.db";
           # Unfortunately c-lightning doesn't allow setting the permissions of the rpc socket,
           # so this must run as the clightning user
           # https://github.com/ElementsProject/lightning/issues/1366

modules/liquid.nix

@@ -180,7 +180,7 @@ in {
   };
 
   config = mkIf cfg.enable {
-    environment.systemPackages = [ pkgs.elementsd ];
+    environment.systemPackages = [ pkgs.nix-bitcoin.elementsd ];
     systemd.services.liquidd = {
       description = "Elements daemon providing access to the Liquid sidechain";
       requires = [ "bitcoind.service" ];
@@ -200,7 +200,7 @@ in {
         Type = "simple";
         User = "${cfg.user}";
         Group = "${cfg.group}";
-        ExecStart = "${pkgs.elementsd}/bin/elementsd ${cmdlineOptions}";
+        ExecStart = "${pkgs.nix-bitcoin.elementsd}/bin/elementsd ${cmdlineOptions}";
         StateDirectory = "liquidd";
         PIDFile = "${pidFile}";
         Restart = "on-failure";

modules/lnd.nix

@@ -102,7 +102,7 @@ in {
 
     systemd.services.lnd = {
       description = "Run LND";
-      path  = [ pkgs.blockchains.bitcoind ];
+      path  = [ pkgs.nix-bitcoin.bitcoind ];
       wantedBy = [ "multi-user.target" ];
       requires = [ "bitcoind.service" ];
       after = [ "bitcoind.service" ];
@@ -115,7 +115,7 @@ in {
       '';
       serviceConfig = {
         PermissionsStartOnly = "true";
-        ExecStart = "${pkgs.lnd}/bin/lnd --configfile=${cfg.dataDir}/lnd.conf";
+        ExecStart = "${pkgs.nix-bitcoin.lnd}/bin/lnd --configfile=${cfg.dataDir}/lnd.conf";
         ExecStartPost = "${pkgs.bash}/bin/bash ${init-lnd-wallet-script}";
         User = "lnd";
         Restart = "on-failure";

modules/modules.nix

@@ -27,5 +27,7 @@ in {
 
   disabledModules = [ "services/networking/bitcoind.nix" ];
 
-  nixpkgs.overlays = [ (self: super: allPackages super) ];
+  nixpkgs.overlays = [ (self: super: {
+    nix-bitcoin = allPackages super;
+  }) ];
 }

modules/nanopos.nix

@@ -65,7 +65,7 @@ in {
       after = [ "lightning-charge.service" ];
       serviceConfig = {
         EnvironmentFile = "/secrets/lightning-charge-api-token-for-nanopos";
-        ExecStart = "${pkgs.nanopos}/bin/nanopos -y ${cfg.itemsFile} -p ${toString cfg.port} --show-bolt11";
+        ExecStart = "${pkgs.nix-bitcoin.nanopos}/bin/nanopos -y ${cfg.itemsFile} -p ${toString cfg.port} --show-bolt11";
 
         User = "nanopos";
         Restart = "on-failure";

modules/nix-bitcoin-webindex.nix

@@ -74,7 +74,7 @@ in {
       description = "Get node info";
       wantedBy = [ "multi-user.target" ];
       after = [ "nodeinfo.service" ];
-      path  = [ pkgs.nodeinfo pkgs.clightning pkgs.jq pkgs.sudo ];
+      path  = with pkgs; [ nix-bitcoin.nodeinfo nix-bitcoin.clightning jq sudo ];
       serviceConfig = {
         ExecStart="${pkgs.bash}/bin/bash ${createWebIndex}";
         User = "root";

modules/nix-bitcoin.nix

@@ -167,9 +167,9 @@ in {
       }];
       version = 3;
     };
-    environment.systemPackages = with pkgs; [
+    environment.systemPackages = with pkgs; with nix-bitcoin; [
       tor
-      blockchains.bitcoind
+      bitcoind
       (hiPrio config.services.bitcoind.cli)
       nodeinfo
       jq

modules/recurring-donations.nix

@@ -82,7 +82,7 @@ in {
       description = "Run recurring-donations";
       requires = [ "clightning.service" ];
       after = [ "clightning.service" ];
-      path  = [ pkgs.clightning pkgs.curl pkgs.torsocks pkgs.sudo pkgs.jq ];
+      path = with pkgs; [ nix-bitcoin.clightning curl torsocks sudo jq ];
       serviceConfig = {
         ExecStart = "${pkgs.bash}/bin/bash ${recurring-donations-script}";
         # TODO: would be better if this was operator, but I don't get sudo

modules/spark-wallet.nix

@@ -8,7 +8,7 @@ let
   dataDir = "/var/lib/spark-wallet/";
   onion-chef-service = (if cfg.onion-service then [ "onion-chef.service" ] else []);
   run-spark-wallet = pkgs.writeScript "run-spark-wallet" ''
-    CMD="${pkgs.spark-wallet}/bin/spark-wallet --ln-path ${cfg.ln-path} -Q -k -c /secrets/spark-wallet-login"
+    CMD="${pkgs.nix-bitcoin.spark-wallet}/bin/spark-wallet --ln-path ${cfg.ln-path} -Q -k -c /secrets/spark-wallet-login"
     ${optionalString cfg.onion-service
       ''
       echo Getting onion hostname