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/*
This file is part of TALER
Copyright (C) 2022 Taler Systems SA
TALER is free software; you can redistribute it and/or modify it under the
terms of the GNU Affero General Public License as published by the Free Software
Foundation; either version 3, or (at your option) any later version.
TALER is distributed in the hope that it will be useful, but WITHOUT ANY
WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR
A PARTICULAR PURPOSE. See the GNU Affero General Public License for more details.
You should have received a copy of the GNU Affero General Public License along with
TALER; see the file COPYING. If not, see <http://www.gnu.org/licenses/>
*/
use bitcoin::{Amount as BtcAmount, Network};
use btc_wire::{
config::{BitcoinConfig, WIRE_WALLET_NAME},
config_bounce_fee,
rpc::{self, auto_rpc_common, auto_rpc_wallet, ErrorCode, Rpc},
rpc_utils::default_data_dir,
};
use clap::StructOpt;
use common::{
config::{load_btc_config, BtcConfig, Config, CoreConfig},
log::log::info,
named_spawn, password,
postgres::{Client, NoTls},
reconnect::auto_reconnect_db,
};
use std::{path::PathBuf, sync::atomic::AtomicU16};
use crate::loops::{analysis::analysis, watcher::watcher, worker::worker};
mod fail_point;
mod loops;
mod sql;
const DEFAULT_CONFIRMATION: u16 = 6;
pub struct WireState {
confirmation: AtomicU16,
max_confirmation: u16,
config: BtcConfig,
bounce_fee: BtcAmount,
}
/// Taler wire for bitcoincore
#[derive(clap::Parser, Debug)]
struct Args {
/// Override default configuration file path
#[clap(global = true, short, long)]
config: Option<PathBuf>,
#[clap(subcommand)]
init: Option<Init>,
}
#[derive(clap::Subcommand, Debug)]
enum Init {
/// Initialize database schema and state
Initdb,
/// Generate bitcoin wallet and initialize state
Initwallet,
}
/// TODO support external signer https://github.com/bitcoin/bitcoin/blob/master/doc/external-signer.md
fn main() {
common::log::init();
let args = Args::parse();
match args.init {
Some(cmd) => init(args.config, cmd),
None => run(args.config),
}
}
fn init(config: Option<PathBuf>, init: Init) {
// Parse taler config
let config = CoreConfig::load_taler_config(config.as_deref(), Some("BTC"));
// Connect to database
let mut db = Client::connect(&config.db_url, NoTls).expect("Failed to connect to database");
// Parse bitcoin config
let btc_conf = BitcoinConfig::load(config.data_dir.unwrap_or_else(default_data_dir))
.expect("Failed to load bitcoin configuration");
// Connect to bitcoin node
let mut rpc = Rpc::common(&btc_conf).expect("Failed to connect to bitcoin RPC server");
match init {
Init::Initdb => {
// Load schema
db.batch_execute(include_str!("../../db/btc.sql"))
.expect("Failed to load database schema");
// Init status to true
db
.execute(
"INSERT INTO state (name, value) VALUES ('status', $1) ON CONFLICT (name) DO NOTHING",
&[&[1u8].as_ref()],
)
.expect("Failed to initialise database state");
// Init last_hash if not already set
let genesis_hash = rpc.get_genesis().expect("Failed to get genesis hash");
db
.execute(
"INSERT INTO state (name, value) VALUES ('last_hash', $1) ON CONFLICT (name) DO NOTHING",
&[&genesis_hash.as_ref()],
)
.expect("Failed to update database state");
println!("Database initialised");
}
Init::Initwallet => {
// Skip past blocks
let info = rpc
.get_blockchain_info()
.expect("Failed to get blockchain info");
let nb_row = db
.execute(
"INSERT INTO state (name, value) VALUES ('last_hash', $1) ON CONFLICT (name) DO NOTHING",
&[&info.best_block_hash.as_ref()],
)
.expect("Failed to update database state");
if nb_row > 0 {
println!("Skip previous block until now");
}
// Create wallet
let passwd = password();
let created = match rpc.create_wallet(WIRE_WALLET_NAME, &passwd) {
Err(rpc::Error::RPC { code, .. }) if code == ErrorCode::RpcWalletError => false,
Err(e) => panic!("{}", e),
Ok(_) => true,
};
rpc.load_wallet(WIRE_WALLET_NAME).ok();
// Load previous address
let prev_addr = db
.query_opt("SELECT value FROM state WHERE name = 'addr'", &[])
.expect("Failed to query database state");
let addr = if let Some(row) = prev_addr {
String::from_utf8(row.get(0)).expect("Stored address is not a valid string")
} else {
// Or generate a new one
let new = Rpc::wallet(&btc_conf, WIRE_WALLET_NAME)
.expect("Failed to connect to wallet bitcoin RPC server")
.gen_addr()
.expect("Failed to generate new address")
.to_string();
db.execute(
"INSERT INTO state (name, value) VALUES ('addr', $1)",
&[&new.as_bytes()],
)
.expect("Failed to update database state");
new
};
if created {
println!("Created new wallet");
} else {
println!("Found already existing wallet")
}
println!("You must backup the generated key file and your chosen password, more info there: https://github.com/bitcoin/bitcoin/blob/master/doc/managing-wallets.md#14-backing-up-the-wallet");
println!("Public address is {}", &addr);
println!("Add the following line into taler.conf:");
println!("[depolymerizer-bitcoin]");
println!("PAYTO = payto://bitcoin/{}", addr);
}
}
}
fn run(config: Option<PathBuf>) {
let config = load_btc_config(config.as_deref());
let data_dir = config
.core
.data_dir
.as_ref()
.cloned()
.unwrap_or_else(default_data_dir);
let btc_config = BitcoinConfig::load(&data_dir).unwrap();
#[cfg(feature = "fail")]
if btc_config.network == Network::Regtest {
common::log::log::warn!("Running with random failures");
} else {
common::log::log::error!("Running with random failures is unsuitable for production");
std::process::exit(1);
}
let chain_name = match btc_config.network {
Network::Bitcoin => "main",
Network::Testnet => "test",
Network::Signet => "signet",
Network::Regtest => "regtest",
};
info!("Running on {} chain", chain_name);
let init_confirmation = config.confirmation.unwrap_or(DEFAULT_CONFIRMATION);
let state: &'static WireState = Box::leak(Box::new(WireState {
confirmation: AtomicU16::new(init_confirmation),
max_confirmation: init_confirmation * 2,
bounce_fee: config_bounce_fee(&config),
config,
}));
let mut rpc = Rpc::common(&btc_config).unwrap();
rpc.load_wallet(WIRE_WALLET_NAME).ok();
let rpc_watcher = auto_rpc_common(btc_config.clone());
let rpc_analysis = auto_rpc_common(btc_config.clone());
let rpc_worker = auto_rpc_wallet(btc_config, WIRE_WALLET_NAME);
let db_watcher = auto_reconnect_db(state.config.core.db_url.clone());
let db_analysis = auto_reconnect_db(state.config.core.db_url.clone());
let db_worker = auto_reconnect_db(state.config.core.db_url.clone());
named_spawn("watcher", move || watcher(rpc_watcher, db_watcher));
named_spawn("analysis", move || {
analysis(rpc_analysis, db_analysis, state)
});
worker(rpc_worker, db_worker, state);
}
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