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

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Nix
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{ config, lib, pkgs, ... }:
with lib;
let
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cfg = config.services;
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nbLib = config.nix-bitcoin.lib;
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operatorName = config.nix-bitcoin.operator.name;
in {
imports = [
../modules.nix
./enable-tor.nix
];
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options = {
# Used by ../versioning.nix
nix-bitcoin.secure-node-preset-enabled = {};
};
config = {
networking.firewall.enable = true;
nix-bitcoin.security.dbusHideProcessInformation = true;
# Use doas instead of sudo
security.doas.enable = true;
security.sudo.enable = false;
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environment.systemPackages = with pkgs; [
jq
];
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# Add a SSH onion service
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services.tor.relay.onionServices.sshd = nbLib.mkOnionService { port = 22; };
nix-bitcoin.onionAddresses.access.${operatorName} = [ "sshd" ];
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services.bitcoind = {
enable = true;
listen = true;
dbCache = 1000;
};
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services.liquidd = {
# Enable `validatepegin` to verify that a transaction sending BTC into
# Liquid exists on Bitcoin. Without it, a malicious liquid federation can
# make the node accept a sidechain that is not fully backed.
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validatepegin = true;
listen = true;
};
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nix-bitcoin.nodeinfo.enable = true;
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services.backups.frequency = "daily";
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# operator
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nix-bitcoin.operator.enable = true;
users.users.${operatorName} = {
openssh.authorizedKeys.keys = config.users.users.root.openssh.authorizedKeys.keys;
};
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};
}