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|
use deadpool_postgres::{Pool, Runtime};
use error::{CatchResult, ServerError};
use hyper::{
http::request::Parts,
service::{make_service_fn, service_fn},
Body, Method, Response, Server, StatusCode,
};
use json::{encode_body, parse_body};
use listenfd::ListenFd;
use std::{convert::Infallible, str::FromStr, time::Instant};
use taler_api::{
api_common::{Amount, SafeUint64, ShortHashCode, Timestamp},
api_wire::{
HistoryParams, IncomingBankTransaction, IncomingHistory, OutgoingBankTransaction,
OutgoingHistory, TransferRequest, TransferResponse,
},
error_codes::ErrorCode,
url::Url,
};
use taler_log::log::{error, info, log, Level};
use tokio_postgres::{config::Host, NoTls};
mod error;
mod json;
struct ServerState {
pool: Pool,
config: taler_config::Config,
}
#[tokio::main]
async fn main() {
taler_log::init();
let conf = taler_config::Config::from_path("test.conf");
#[cfg(feature = "test")]
taler_log::log::warn!("Running with test admin endpoint unsuitable for production");
// Parse postgres url
let config = tokio_postgres::Config::from_str(&conf.db_url).unwrap();
// TODO find a way to clean this ugly mess
let mut cfg = deadpool_postgres::Config::new();
cfg.user = config.get_user().map(|it| it.to_string());
cfg.password = config
.get_password()
.map(|it| String::from_utf8(it.to_vec()).unwrap());
cfg.dbname = config.get_dbname().map(|it| it.to_string());
cfg.options = config.get_options().map(|it| it.to_string());
cfg.host = Some(
config
.get_hosts()
.into_iter()
.map(|it| match it {
Host::Tcp(it) => it.to_string(),
#[cfg(target_os = "linux")]
Host::Unix(it) => it.to_str().unwrap().to_string(),
})
.collect(),
);
cfg.ports = Some(config.get_ports().to_vec());
cfg.application_name = config.get_application_name().map(|it| it.to_string());
cfg.connect_timeout = config.get_connect_timeout().cloned();
let pool = cfg.create_pool(Some(Runtime::Tokio1), NoTls).unwrap();
let state = ServerState { pool, config: conf };
let state: &'static ServerState = Box::leak(Box::new(state));
let make_service = make_service_fn(move |_| async move {
Ok::<_, Infallible>(service_fn(move |req| async move {
let start = Instant::now();
let (parts, body) = req.into_parts();
let (response, msg) = match router(&parts, body, state).await {
Ok(resp) => (resp, String::new()),
Err(err) => err.response(),
};
let status = response.status().as_u16();
let level = if status >= 500 {
Level::Error
} else if status >= 400 {
Level::Warn
} else {
Level::Info
};
log!(
level,
"{} {} {}ms {} - {}",
parts.method,
status,
start.elapsed().as_millis(),
parts.uri.path(),
msg
);
Ok::<Response<Body>, Infallible>(response)
}))
});
let mut listenfd = ListenFd::from_env();
let server = if let Some(listener) = listenfd.take_tcp_listener(0).unwrap() {
info!(
"Server listening on activated socket {}",
listener.local_addr().unwrap()
);
Server::from_tcp(listener).unwrap().serve(make_service)
} else {
let addr = ([0, 0, 0, 0], state.config.port).into();
info!("Server listening on http://{}", &addr);
Server::bind(&addr).serve(make_service)
};
if let Err(e) = server.await {
error!("server: {}", e);
}
}
/// Check if an url is a valid bitcoin payto url
fn check_pay_to(url: &Url) -> bool {
return url.domain() == Some("bitcoin")
&& url.scheme() == "payto"
&& url.username() == ""
&& url.password().is_none()
&& url.query().is_none()
&& url.fragment().is_none()
&& bitcoin::Address::from_str(url.path().trim_start_matches('/')).is_ok();
}
/// Assert request method match expected
fn assert_method(parts: &Parts, method: Method) -> Result<(), ServerError> {
if parts.method == method {
Ok(())
} else {
Err(ServerError::code(
StatusCode::METHOD_NOT_ALLOWED,
ErrorCode::GENERIC_METHOD_INVALID,
))
}
}
/// Parse history params from request
fn history_params(parts: &Parts) -> Result<HistoryParams, ServerError> {
let params: HistoryParams = serde_urlencoded::from_str(parts.uri.query().unwrap_or(""))
.catch_code(
StatusCode::BAD_REQUEST,
ErrorCode::GENERIC_PARAMETER_MALFORMED,
)?;
if params.delta == 0 {
return Err(ServerError::code(
StatusCode::BAD_REQUEST,
ErrorCode::GENERIC_PARAMETER_MALFORMED,
));
}
Ok(params)
}
/// Generate sql query filter from history params
fn sql_history_filter(params: &HistoryParams) -> String {
let asc = params.delta > 0;
let limit = params.delta.abs();
let order_sql = if asc { "ASC" } else { "DESC" };
let where_sql = if let Some(start) = params.start {
format!("WHERE id {} {}", if asc { '>' } else { '<' }, start)
} else {
String::new()
};
format!("{} ORDER BY id {} LIMIT {}", where_sql, order_sql, limit)
}
async fn router(
parts: &Parts,
body: Body,
state: &'static ServerState,
) -> Result<Response<Body>, ServerError> {
let response = match parts.uri.path() {
"/transfer" => {
assert_method(parts, Method::POST)?;
let request: TransferRequest = parse_body(parts, body).await.catch_code(
StatusCode::BAD_REQUEST,
ErrorCode::GENERIC_PARAMETER_MALFORMED,
)?;
if !check_pay_to(&request.credit_account) {
return Err(ServerError::code(
StatusCode::BAD_REQUEST,
ErrorCode::GENERIC_PAYTO_URI_MALFORMED,
));
}
if request.amount.currency != "BTC" {
return Err(ServerError::code(
StatusCode::BAD_REQUEST,
ErrorCode::GENERIC_PARAMETER_MALFORMED,
));
}
let db = state.pool.get().await.catch_code(
StatusCode::GATEWAY_TIMEOUT,
ErrorCode::GENERIC_DB_FETCH_FAILED,
)?;
// Handle idempotence, check previous transaction with the same request_uid
let row = db.query_opt("SELECT amount, exchange_url, wtid, credit_acc, id, _date FROM tx_out WHERE request_uid = $1", &[&request.request_uid.as_ref()])
.await?;
if let Some(row) = row {
let prev = TransferRequest {
request_uid: request.request_uid.clone(),
amount: Amount::from_str(row.get(0)).unwrap(),
exchange_base_url: Url::parse(row.get(1)).unwrap(),
wtid: {
let slice: &[u8] = row.get(2);
let array: [u8; 32] = slice.try_into().unwrap();
ShortHashCode::from(array)
},
credit_account: Url::parse(row.get(3)).unwrap(),
};
if prev == request {
// Idempotence
return encode_body(
parts,
StatusCode::OK,
&TransferResponse {
timestamp: Timestamp::Time(row.get(5)),
row_id: {
let id: i32 = row.get(4);
SafeUint64::try_from(id as u64).unwrap()
},
},
)
.await
.unexpected();
} else {
return Err(ServerError::status(StatusCode::CONFLICT));
}
}
let timestamp = Timestamp::now();
let row = db.query_one("INSERT INTO tx_out (_date, amount, wtid, debit_acc, credit_acc, exchange_url, status, request_uid) VALUES (now(), $1, $2, $3, $4, $5, $6, $7) RETURNING id", &[
&request.amount.to_string(), &request.wtid.as_ref(), &state.config.payto.as_ref(), &request.credit_account.as_ref(), &request.exchange_base_url.as_ref(), &0i16, &request.request_uid.as_ref()
]).await?;
encode_body(
parts,
StatusCode::OK,
&TransferResponse {
timestamp,
row_id: {
let id: i32 = row.get(0);
SafeUint64::try_from(id as u64).unwrap()
},
},
)
.await
.unexpected()?
}
"/history/incoming" => {
assert_method(&parts, Method::GET)?;
let params = history_params(&parts)?;
let filter = sql_history_filter(¶ms);
let db = state.pool.get().await.catch_code(
StatusCode::GATEWAY_TIMEOUT,
ErrorCode::GENERIC_DB_FETCH_FAILED,
)?;
let transactions = db
.query(
&format!("SELECT id, _date, amount, reserve_pub, debit_acc, credit_acc FROM tx_in {}", filter),
&[],
)
.await.catch_code(
StatusCode::BAD_GATEWAY,
ErrorCode::GENERIC_DB_FETCH_FAILED,
)?
.into_iter()
.map(|row| IncomingBankTransaction::IncomingReserveTransaction {
row_id: {
let id: i32 = row.get(0);
SafeUint64::try_from(id as u64).unwrap()
},
date: Timestamp::Time(row.get(1)),
amount: Amount::from_str(row.get(2)).unwrap(),
reserve_pub: {
let slice: &[u8] = row.get(3);
let array: [u8; 32] = slice.try_into().unwrap();
ShortHashCode::from(array)
},
debit_account: Url::parse(row.get(4)).unwrap(),
credit_account: Url::parse(row.get(5)).unwrap(),
})
.collect();
encode_body(
parts,
StatusCode::OK,
&IncomingHistory {
incoming_transactions: transactions,
},
)
.await
.unexpected()?
}
"/history/outgoing" => {
assert_method(&parts, Method::GET)?;
let params = history_params(&parts)?;
let filter = sql_history_filter(¶ms);
let db = state.pool.get().await.catch_code(
StatusCode::GATEWAY_TIMEOUT,
ErrorCode::GENERIC_DB_FETCH_FAILED,
)?;
let transactions = db
.query(
&format!("SELECT id, _date, amount, wtid, debit_acc, credit_acc, exchange_url FROM tx_out {}",filter),
&[],
)
.await.catch_code(
StatusCode::BAD_GATEWAY,
ErrorCode::GENERIC_DB_FETCH_FAILED,
)?
.into_iter()
.map(|row| OutgoingBankTransaction {
row_id: {
let id: i32 = row.get(0);
SafeUint64::try_from(id as u64).unwrap()
},
date: Timestamp::Time(row.get(1)),
amount: Amount::from_str(row.get(2)).unwrap(),
wtid: {
let slice : &[u8] = row.get(3);
let array: [u8; 32] = slice.try_into().unwrap();
ShortHashCode::from(array)
},
debit_account: Url::parse(row.get(4)).unwrap(),
credit_account: Url::parse(row.get(5)).unwrap(),
exchange_base_url: Url::parse(row.get(6)).unwrap(),
})
.collect();
encode_body(
parts,
StatusCode::OK,
&OutgoingHistory {
outgoing_transactions: transactions,
},
)
.await
.unexpected()?
}
#[cfg(feature = "test")]
"/admin/add-incoming" => {
// We do not check input as this is a test admin endpoint
assert_method(&parts, Method::POST).unwrap();
let request: taler_api::api_wire::AddIncomingRequest =
parse_body(&parts, body).await.unwrap();
let timestamp = Timestamp::now();
let db = state.pool.get().await.catch_code(
StatusCode::GATEWAY_TIMEOUT,
ErrorCode::GENERIC_DB_FETCH_FAILED,
)?;
let row = db.query_one("INSERT INTO tx_in (_date, amount, reserve_pub, debit_acc, credit_acc) VALUES (now(), $1, $2, $3, $4) RETURNING id", &[
&request.amount.to_string(), &request.reserve_pub.as_ref(), &request.debit_account.as_ref(), &"payto://bitcoin/bcrt1qgkgxkjj27g3f7s87mcvjjsghay7gh34cx39prj"
]).await.catch_code(
StatusCode::BAD_GATEWAY,
ErrorCode::GENERIC_DB_FETCH_FAILED,
)?;
encode_body(
parts,
StatusCode::OK,
&TransferResponse {
timestamp,
row_id: {
let id: i32 = row.get(0);
SafeUint64::try_from(id as u64).unwrap()
},
},
)
.await
.unexpected()?
}
_ => {
return Err(ServerError::code(
StatusCode::NOT_FOUND,
ErrorCode::GENERIC_ENDPOINT_UNKNOWN,
))
}
};
return Ok(response);
}
|
