nix-bitcoin/modules/presets/secure-node.nix

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{ config, lib, pkgs, ... }:
with lib;
let
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cfg = config.services;
operatorName = config.nix-bitcoin.operatorName;
mkHiddenService = map: {
map = [ map ];
version = 3;
};
in {
imports = [
../modules.nix
../nodeinfo.nix
../nix-bitcoin-webindex.nix
];
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options = {
services.clightning.onionport = mkOption {
type = types.ints.u16;
default = 9735;
description = "Port on which to listen for tor client connections.";
};
services.electrs.onionport = mkOption {
type = types.ints.u16;
default = 50002;
description = "Port on which to listen for tor client connections.";
};
nix-bitcoin.operatorName = mkOption {
type = types.str;
default = "operator";
description = "Less-privileged user's name.";
};
};
config = {
# For backwards compatibility only
nix-bitcoin.secretsDir = mkDefault "/secrets";
networking.firewall.enable = true;
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# Tor
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services.tor = {
enable = true;
client.enable = true;
# LND uses ControlPort to create onion services
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controlPort = mkIf cfg.lnd.enable 9051;
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hiddenServices.sshd = mkHiddenService { port = 22; };
};
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# bitcoind
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services.bitcoind = {
enable = true;
listen = true;
dataDirReadableByGroup = mkIf cfg.electrs.high-memory true;
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proxy = cfg.tor.client.socksListenAddress;
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enforceTor = true;
port = 8333;
zmqpubrawblock = "tcp://127.0.0.1:28332";
zmqpubrawtx = "tcp://127.0.0.1:28333";
assumevalid = "00000000000000000000e5abc3a74fe27dc0ead9c70ea1deb456f11c15fd7bc6";
addnodes = [ "ecoc5q34tmbq54wl.onion" ];
discover = false;
addresstype = "bech32";
prune = 0;
dbCache = 1000;
};
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services.tor.hiddenServices.bitcoind = mkHiddenService { port = cfg.bitcoind.port; };
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# clightning
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services.clightning = {
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bitcoin-rpcuser = cfg.bitcoind.rpcuser;
proxy = cfg.tor.client.socksListenAddress;
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enforceTor = true;
always-use-proxy = true;
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bind-addr = "127.0.0.1:${toString cfg.clightning.onionport}";
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};
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services.tor.hiddenServices.clightning = mkHiddenService { port = cfg.clightning.onionport; };
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# lnd
services.lnd.enforceTor = true;
# liquidd
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services.liquidd = {
rpcuser = "liquidrpc";
prune = 1000;
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extraConfig = ''
mainchainrpcuser=${cfg.bitcoind.rpcuser}
mainchainrpcport=8332
'';
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validatepegin = true;
listen = true;
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proxy = cfg.tor.client.socksListenAddress;
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enforceTor = true;
port = 7042;
};
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services.tor.hiddenServices.liquidd = mkHiddenService { port = cfg.liquidd.port; };
# electrs
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services.electrs = {
port = 50001;
enforceTor = true;
TLSProxy.enable = true;
TLSProxy.port = 50003;
};
services.tor.hiddenServices.electrs = mkHiddenService {
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port = cfg.electrs.onionport;
toPort = if cfg.electrs.TLSProxy.enable then cfg.electrs.TLSProxy.port else cfg.electrs.port;
};
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services.spark-wallet.onion-service = true;
services.nix-bitcoin-webindex.enforceTor = true;
environment.systemPackages = with pkgs; [
tor
jq
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qrencode
];
# Create operator user which can access the node's services
users.users.${operatorName} = {
isNormalUser = true;
extraGroups = [
"systemd-journal"
cfg.bitcoind.group
]
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++ (optionals cfg.clightning.enable [ "clightning" ])
++ (optionals cfg.lnd.enable [ "lnd" ])
++ (optionals cfg.liquidd.enable [ cfg.liquidd.group ])
++ (optionals (cfg.hardware-wallets.ledger || cfg.hardware-wallets.trezor)
[ cfg.hardware-wallets.group ]);
openssh.authorizedKeys.keys = config.users.users.root.openssh.authorizedKeys.keys;
};
# Give operator access to onion hostnames
services.onion-chef.enable = true;
services.onion-chef.access.${operatorName} = [ "bitcoind" "clightning" "nginx" "liquidd" "spark-wallet" "electrs" "sshd" ];
security.sudo.configFile =
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(optionalString cfg.lnd.enable ''
${operatorName} ALL=(lnd) NOPASSWD: ALL
'');
# Enable nixops ssh for operator (`nixops ssh operator@mynode`) on nixops-vbox deployments
systemd.services.get-vbox-nixops-client-key =
mkIf (builtins.elem ".vbox-nixops-client-key" config.services.openssh.authorizedKeysFiles) {
postStart = ''
cp "${config.users.users.root.home}/.vbox-nixops-client-key" "${config.users.users.${operatorName}.home}"
'';
};
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};
}