nixpkgs/nixos/modules/services/networking/blockbook-frontend.nix
2020-06-26 16:16:49 +02:00

273 lines
9.2 KiB
Nix

{ config, lib, pkgs, ... }:
with lib;
let
eachBlockbook = config.services.blockbook-frontend;
blockbookOpts = { config, lib, name, ...}: {
options = {
enable = mkEnableOption "blockbook-frontend application.";
package = mkOption {
type = types.package;
default = pkgs.blockbook;
description = "Which blockbook package to use.";
};
user = mkOption {
type = types.str;
default = "blockbook-frontend-${name}";
description = "The user as which to run blockbook-frontend-${name}.";
};
group = mkOption {
type = types.str;
default = "${config.user}";
description = "The group as which to run blockbook-frontend-${name}.";
};
certFile = mkOption {
type = types.nullOr types.path;
default = null;
example = "/etc/secrets/blockbook-frontend-${name}/certFile";
description = ''
To enable SSL, specify path to the name of certificate files without extension.
Expecting <filename>certFile.crt</filename> and <filename>certFile.key</filename>.
'';
};
configFile = mkOption {
type = with types; nullOr path;
default = null;
example = "${config.dataDir}/config.json";
description = "Location of the blockbook configuration file.";
};
coinName = mkOption {
type = types.str;
default = "Bitcoin";
example = "Bitcoin";
description = ''
See <link xlink:href="https://github.com/trezor/blockbook/blob/master/bchain/coins/blockchain.go#L61"/>
for current of coins supported in master (Note: may differ from release).
'';
};
cssDir = mkOption {
type = types.path;
default = "${config.package}/share/css/";
example = "${config.dataDir}/static/css/";
description = ''
Location of the dir with <filename>main.css</filename> CSS file.
By default, the one shipped with the package is used.
'';
};
dataDir = mkOption {
type = types.path;
default = "/var/lib/blockbook-frontend-${name}";
description = "Location of blockbook-frontend-${name} data directory.";
};
debug = mkOption {
type = types.bool;
default = false;
description = "Debug mode, return more verbose errors, reload templates on each request.";
};
internal = mkOption {
type = types.nullOr types.str;
default = ":9030";
example = ":9030";
description = "Internal http server binding <literal>[address]:port</literal>.";
};
messageQueueBinding = mkOption {
type = types.str;
default = "tcp://127.0.0.1:38330";
example = "tcp://127.0.0.1:38330";
description = "Message Queue Binding <literal>address:port</literal>.";
};
public = mkOption {
type = types.nullOr types.str;
default = ":9130";
example = ":9130";
description = "Public http server binding <literal>[address]:port</literal>.";
};
rpc = {
url = mkOption {
type = types.str;
default = "http://127.0.0.1";
description = "URL for JSON-RPC connections.";
};
port = mkOption {
type = types.port;
default = 8030;
description = "Port for JSON-RPC connections.";
};
user = mkOption {
type = types.str;
default = "rpc";
example = "rpc";
description = "Username for JSON-RPC connections.";
};
password = mkOption {
type = types.str;
default = "rpc";
example = "rpc";
description = ''
RPC password for JSON-RPC connections.
Warning: this is stored in cleartext in the Nix store!!!
Use <literal>configFile</literal> or <literal>passwordFile</literal> if needed.
'';
};
passwordFile = mkOption {
type = types.nullOr types.path;
default = null;
description = ''
File containing password of the RPC user.
Note: This options is ignored when <literal>configFile</literal> is used.
'';
};
};
sync = mkOption {
type = types.bool;
default = true;
description = "Synchronizes until tip, if together with zeromq, keeps index synchronized.";
};
templateDir = mkOption {
type = types.path;
default = "${config.package}/share/templates/";
example = "${config.dataDir}/templates/static/";
description = "Location of the HTML templates. By default, ones shipped with the package are used.";
};
extraConfig = mkOption {
type = types.attrs;
default = {};
example = literalExample '' {
alternative_estimate_fee = "whatthefee-disabled";
alternative_estimate_fee_params = "{\"url\": \"https://whatthefee.io/data.json\", \"periodSeconds\": 60}";
fiat_rates = "coingecko";
fiat_rates_params = "{\"url\": \"https://api.coingecko.com/api/v3\", \"coin\": \"bitcoin\", \"periodSeconds\": 60}";
coin_shortcut = "BTC";
coin_label = "Bitcoin";
xpub_magic = 76067358;
xpub_magic_segwit_p2sh = 77429938;
xpub_magic_segwit_native = 78792518;
}'';
description = ''
Additional configurations to be appended to <filename>coin.conf</filename>.
Overrides any already defined configuration options.
See <link xlink:href="https://github.com/trezor/blockbook/tree/master/configs/coins"/>
for current configuration options supported in master (Note: may differ from release).
'';
};
extraCmdLineOptions = mkOption {
type = types.listOf types.str;
default = [];
example = [ "-workers=1" "-dbcache=0" "-logtosderr" ];
description = ''
Extra command line options to pass to Blockbook.
Run blockbook --help to list all available options.
'';
};
};
};
in
{
# interface
options = {
services.blockbook-frontend = mkOption {
type = types.attrsOf (types.submodule blockbookOpts);
default = {};
description = "Specification of one or more blockbook-frontend instances.";
};
};
# implementation
config = mkIf (eachBlockbook != {}) {
systemd.services = mapAttrs' (blockbookName: cfg: (
nameValuePair "blockbook-frontend-${blockbookName}" (
let
configFile = if cfg.configFile != null then cfg.configFile else
pkgs.writeText "config.conf" (builtins.toJSON ( {
coin_name = "${cfg.coinName}";
rpc_user = "${cfg.rpc.user}";
rpc_pass = "${cfg.rpc.password}";
rpc_url = "${cfg.rpc.url}:${toString cfg.rpc.port}";
message_queue_binding = "${cfg.messageQueueBinding}";
} // cfg.extraConfig)
);
in {
description = "blockbook-frontend-${blockbookName} daemon";
after = [ "network.target" ];
wantedBy = [ "multi-user.target" ];
preStart = ''
ln -sf ${cfg.templateDir} ${cfg.dataDir}/static/
ln -sf ${cfg.cssDir} ${cfg.dataDir}/static/
${optionalString (cfg.rpc.passwordFile != null && cfg.configFile == null) ''
CONFIGTMP=$(mktemp)
${pkgs.jq}/bin/jq ".rpc_pass = \"$(cat ${cfg.rpc.passwordFile})\"" ${configFile} > $CONFIGTMP
mv $CONFIGTMP ${cfg.dataDir}/${blockbookName}-config.json
''}
'';
serviceConfig = {
User = cfg.user;
Group = cfg.group;
ExecStart = ''
${cfg.package}/bin/blockbook \
${if (cfg.rpc.passwordFile != null && cfg.configFile == null) then
"-blockchaincfg=${cfg.dataDir}/${blockbookName}-config.json"
else
"-blockchaincfg=${configFile}"
} \
-datadir=${cfg.dataDir} \
${optionalString (cfg.sync != false) "-sync"} \
${optionalString (cfg.certFile != null) "-certfile=${toString cfg.certFile}"} \
${optionalString (cfg.debug != false) "-debug"} \
${optionalString (cfg.internal != null) "-internal=${toString cfg.internal}"} \
${optionalString (cfg.public != null) "-public=${toString cfg.public}"} \
${toString cfg.extraCmdLineOptions}
'';
Restart = "on-failure";
WorkingDirectory = cfg.dataDir;
LimitNOFILE = 65536;
};
}
) )) eachBlockbook;
systemd.tmpfiles.rules = flatten (mapAttrsToList (blockbookName: cfg: [
"d ${cfg.dataDir} 0750 ${cfg.user} ${cfg.group} - -"
"d ${cfg.dataDir}/static 0750 ${cfg.user} ${cfg.group} - -"
]) eachBlockbook);
users.users = mapAttrs' (blockbookName: cfg: (
nameValuePair "blockbook-frontend-${blockbookName}" {
name = cfg.user;
group = cfg.group;
home = cfg.dataDir;
isSystemUser = true;
})) eachBlockbook;
users.groups = mapAttrs' (instanceName: cfg: (
nameValuePair "${cfg.group}" { })) eachBlockbook;
};
}