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|
use error::{CatchResult, ServerError};
use hyper::{
http::request::Parts,
service::{make_service_fn, service_fn},
Body, Error, Method, Response, Server, StatusCode,
};
use json::parse_body;
use std::{process::exit, str::FromStr, time::Instant};
use taler_log::log::{error, info, log, Level};
use tokio_postgres::{Client, NoTls};
use url::Url;
use wire_gateway::{
api_common::{Amount, SafeUint64, ShortHashCode, Timestamp},
api_wire::{
HistoryParams, IncomingBankTransaction, IncomingHistory, OutgoingBankTransaction,
OutgoingHistory, TransferRequest, TransferResponse,
},
error_codes::ErrorCode,
};
use crate::json::encode_body;
mod error;
mod json;
const SELF_PAYTO: &str = "payto://bitcoin/bcrt1qgkgxkjj27g3f7s87mcvjjsghay7gh34cx39prj";
#[cfg(target_family = "windows")]
const DB_URL: &str = "postgres://localhost/wire_gateway?user=postgres";
#[cfg(target_family = "unix")]
const DB_URL: &str = "postgres://localhost?user=postgres&password=password";
#[tokio::main]
async fn main() {
taler_log::init();
#[cfg(feature = "test")]
taler_log::log::warn!("Running with test admin endpoint unsuitable for production");
let (client, connection) = tokio_postgres::connect(DB_URL, NoTls).await.unwrap();
tokio::spawn(async move {
if let Err(e) = connection.await {
error!("DB: {}", e);
exit(1);
}
});
let state = ServerState { client };
let state: &'static ServerState = Box::leak(Box::new(state));
let addr = ([0, 0, 0, 0], 8080).into();
let make_service = make_service_fn(move |_| async move {
Ok::<_, Error>(service_fn(move |req| async move {
let start = Instant::now();
let (parts, body) = req.into_parts();
let response = match router(&parts, body, state).await {
Ok(resp) => resp,
Err(err) => err.response(),
};
// TODO log error message inlined into response log OR use a request id to link error message and 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,
"{} {} {:>2}ms {}",
parts.method,
status,
start.elapsed().as_millis(),
parts.uri.path()
);
Ok::<Response<Body>, Error>(response)
}))
});
let server = Server::bind(&addr).serve(make_service);
info!("Server listening on http://{}", addr);
if let Err(e) = server.await {
error!("server: {}", e);
}
}
struct ServerState {
client: Client,
}
/// 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 timestamp = Timestamp::now();
let row = state.client.query_one("INSERT INTO tx_out (_date, amount, wtid, debit_acc, credit_acc, exchange_url, status) VALUES (now(), $1, $2, $3, $4, $5, $6) RETURNING id", &[
&request.amount.to_string(), &request.wtid.as_ref(), &SELF_PAYTO, &request.credit_account.to_string(), &request.exchange_base_url.to_string(), &0i16
]).await.unwrap();
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 transactions = state
.client
.query(
&format!("SELECT id, _date, amount, reserve_pub, debit_acc, credit_acc FROM tx_in {}", filter),
&[],
)
.await
.unwrap()
.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 transactions = state
.client
.query(
&format!("SELECT id, _date, amount, wtid, debit_acc, credit_acc, exchange_url FROM tx_out {}",filter),
&[],
)
.await
.unwrap()
.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: wire_gateway::api_wire::AddIncomingRequest =
parse_body(&parts, body).await.unwrap();
let timestamp = Timestamp::now();
let row = state.client.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.to_string(), &"payto://bitcoin/bcrt1qgkgxkjj27g3f7s87mcvjjsghay7gh34cx39prj"
]).await.unwrap();
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);
}
|
