108 lines
3.6 KiB
Nix
108 lines
3.6 KiB
Nix
{ config, lib, pkgs, ... }:
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with lib;
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let
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options.services.recurring-donations = {
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enable = mkEnableOption "recurring-donations";
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tallycoin = mkOption {
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type = types.attrs;
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default = {};
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description = ''
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This option is used to specify tallycoin donation receivers using an
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attribute set. For example the following setting instructs the module
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to repeatedly send 1000 satoshis to djbooth007.
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{
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"djbooth007" = 1000;
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}
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'';
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};
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interval = mkOption {
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type = types.str;
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default = "Mon *-*-* 00:00:00";
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description = ''
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Schedules the donations. Default is weekly on Mon 00:00:00. See `man
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systemd.time` for further options.
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'';
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};
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randomizedDelaySec = mkOption {
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type = types.int;
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default = 86400;
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description = ''
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Random delay to add to scheduled time for donation. Default is one day.
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'';
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};
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enforceTor = nbLib.enforceTor;
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};
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cfg = config.services.recurring-donations;
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nbLib = config.nix-bitcoin.lib;
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recurring-donations-script = pkgs.writeScript "recurring-donations.sh" ''
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LNCLI="${config.nix-bitcoin.pkgs.clightning}/bin/lightning-cli --lightning-dir=${config.services.clightning.dataDir}"
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pay_tallycoin() {
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NAME=$1
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AMOUNT=$2
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echo "Attempting to pay $AMOUNT sat to $NAME"
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INVOICE=$(curl --socks5-hostname ${config.nix-bitcoin.torClientAddressWithPort} -d "satoshi_amount=$AMOUNT&payment_method=ln&id=$NAME&type=profile" -X POST https://api.tallyco.in/v1/payment/request/ | jq -r '.lightning_pay_request') 2> /dev/null
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if [ -z "$INVOICE" ] || [ "$INVOICE" = "null" ]; then
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echo "ERROR: did not get invoice from tallycoin"
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return
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fi
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# Decode invoice and compare amount with requested amount
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DECODED_AMOUNT=$($LNCLI decodepay "$INVOICE" | jq -r '.amount_msat' | head -c -8)
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if [ -z "$DECODED_AMOUNT" ] || [ "$DECODED_AMOUNT" = "null" ]; then
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echo "ERROR: did not get response from clightning"
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return
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fi
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if [ $DECODED_AMOUNT -eq $AMOUNT ]; then
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echo "Paying with invoice $INVOICE"
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$LNCLI pay "$INVOICE"
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else
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echo "ERROR: requested amount and invoice amount do not match. $AMOUNT vs $DECODED_AMOUNT"
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return
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fi
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}
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${ builtins.foldl'
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(x: receiver: x +
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''
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pay_tallycoin ${receiver} ${toString (builtins.getAttr receiver cfg.tallycoin)}
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'')
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""
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(builtins.attrNames cfg.tallycoin)
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}
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'';
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in {
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inherit options;
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config = mkIf cfg.enable {
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services.clightning.enable = true;
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systemd.services.recurring-donations = {
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requires = [ "clightning.service" ];
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after = [ "clightning.service" ];
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path = with pkgs; [ nix-bitcoin.clightning curl jq ];
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serviceConfig = nbLib.defaultHardening // {
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ExecStart = "${pkgs.bash}/bin/bash ${recurring-donations-script}";
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User = "recurring-donations";
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Type = "oneshot";
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} // nbLib.allowedIPAddresses cfg.enforceTor;
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};
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systemd.timers.recurring-donations = {
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requires = [ "clightning.service" ];
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after = [ "clightning.service" ];
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timerConfig = {
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Unit = "recurring-donations.service";
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OnCalendar = cfg.interval;
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RandomizedDelaySec = toString cfg.randomizedDelaySec;
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};
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wantedBy = [ "multi-user.target" ];
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};
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users.users.recurring-donations = {
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isSystemUser = true;
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group = "recurring-donations";
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extraGroups = [ config.services.clightning.group ];
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};
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users.groups.recurring-donations = {};
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};
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}
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