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lnd: use onionServices for address announcing

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This commit is contained in:
Erik Arvstedt 2021-01-14 13:24:21 +01:00
parent 3980cd5a41
commit bed00fe937
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GPG Key ID: 33312B944DD97846
2 changed files with 23 additions and 16 deletions
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10
examples/configuration.nix
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@ -53,10 +53,12 @@
# you must disable clightning or change the services.clightning.port or
# services.lnd.port to a port other than 9735.
# services.lnd.enable = true;
# Enable this option to announce our Tor Hidden Service. By default lnd
# offers outgoing functionality, but doesn't announce the Tor Hidden Service
# under which peers can reach us.
# services.lnd.announce-tor = true;
#
# Set this to create an onion service by which lnd can accept incoming connections
# via Tor.
# The onion service is automatically announced to peers.
# nix-bitcoin.onionServices.lnd.public = true;
#
## WARNING
# If you use lnd, you should manually backup your wallet mnemonic
# seed. This will allow you to recover on-chain funds. You can run the

29
modules/lnd.nix
View File

@ -9,7 +9,6 @@ let
bitcoind = config.services.bitcoind;
bitcoindRpcAddress = bitcoind.rpc.address;
onionAddressesService = (if cfg.announce-tor then [ "onion-addresses.service" ] else []);
networkDir = "${cfg.dataDir}/chain/bitcoin/${bitcoind.network}";
configFile = pkgs.writeText "lnd.conf" ''
datadir=${cfg.dataDir}
@ -92,11 +91,6 @@ in {
default = if cfg.enforceTor then config.services.tor.client.socksListenAddress else null;
description = "Set a socks proxy to use to connect to Tor nodes";
};
announce-tor = mkOption {
type = types.bool;
default = false;
description = "Announce LND Tor Hidden Service";
};
macaroons = mkOption {
default = {};
type = with types; attrsOf (submodule {
@ -142,7 +136,15 @@ in {
'';
description = "Binary to connect with the lnd instance.";
};
enforceTor = nix-bitcoin-services.enforceTor;
getPublicAddressCmd = mkOption {
type = types.str;
default = "";
description = ''
Bash expression which outputs the public service address to announce to peers.
If left empty, no address is announced.
'';
};
inherit (nix-bitcoin-services) enforceTor;
};
config = mkIf cfg.enable {
@ -165,16 +167,19 @@ in {
zmqpubrawtx = "tcp://${bitcoindRpcAddress}:28333";
};
nix-bitcoin.onionAddresses.access.lnd = if cfg.announce-tor then [ "lnd" ] else [];
systemd.services.lnd = {
description = "Run LND";
wantedBy = [ "multi-user.target" ];
requires = [ "bitcoind.service" ] ++ onionAddressesService;
after = [ "bitcoind.service" ] ++ onionAddressesService;
requires = [ "bitcoind.service" ];
after = [ "bitcoind.service" ];
preStart = ''
install -m600 ${configFile} '${cfg.dataDir}/lnd.conf'
echo "bitcoind.rpcpass=$(cat ${secretsDir}/bitcoin-rpcpassword-public)" >> '${cfg.dataDir}/lnd.conf'
${optionalString cfg.announce-tor "echo externalip=$(cat /var/lib/onion-addresses/lnd/lnd) >> '${cfg.dataDir}/lnd.conf'"}
{
echo "bitcoind.rpcpass=$(cat ${secretsDir}/bitcoin-rpcpassword-public)"
${optionalString (cfg.getPublicAddressCmd != "") ''
echo "externalip=$(${cfg.getPublicAddressCmd})"
''}
} >> '${cfg.dataDir}/lnd.conf'
'';
serviceConfig = nix-bitcoin-services.defaultHardening // {
RuntimeDirectory = "lnd"; # Only used to store custom macaroons