Handle and test losing database connection in wire-gateway - depolymerization

commit c016404cd3dd43b085c7f84fd137258bf27ee0f1
parent b8b1200be9810a1e03f47e90c2d3f0ebb309ccd5
Author: Antoine A <>
Date:   Fri, 10 Dec 2021 19:08:13 +0100

Handle and test losing database connection in wire-gateway

Diffstat:
M Cargo.lock  | 3594 ++++++++++++++++++++++++++++++++++++++++---------------------------------------
M btc-wire/src/rpc_utils.rs  | 2 --
M makefile  | 5 +++--
M script/test_btc_wire.sh  | 1 +
M script/test_gateway.sh  | 1 +
A script/test_recover_db.sh  | 62 ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
M test.conf  | 2 +-
M wire-gateway/Cargo.toml  | 1 +
M wire-gateway/src/error.rs  | 2 +-
M wire-gateway/src/main.rs  | 102 +++++++++++++++++++++++++++++++++++++++++++++++++++++++------------------------

10 files changed, 1955 insertions(+), 1817 deletions(-)
diff --git a/Cargo.lock b/Cargo.lock
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+
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+version = "0.1.0"
+dependencies = [
+ "base32",
+ "bitcoin",
+ "configparser",
+ "deadpool-postgres",
+ "hyper",
+ "listenfd",
+ "miniz_oxide",
+ "rand",
+ "serde",
+ "serde_json",
+ "serde_urlencoded",
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+ "tokio",
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diff --git a/btc-wire/src/rpc_utils.rs b/btc-wire/src/rpc_utils.rs
@@ -113,12 +113,10 @@ pub fn dirty_guess_network(data_dir: &Path) -> Network {
     if result_test.is_ok() {
         return Network::TestNet;
     }
-
     let result_main = common_rpc(data_dir, Network::MainNet).and_then(|rpc| rpc.get_network_info());
     if result_main.is_ok() {
         return Network::MainNet;
     }
-
     unreachable!(
         "Failed to connect to any chain\nreg: {:?}\ntest: {:?}\nmain: {:?}",
         result_reg, result_main, result_test
diff --git a/makefile b/makefile
@@ -4,4 +4,5 @@ install:
 
 test:
 	script/test_gateway.sh
-	script/test_btc_wire.sh
-\ No newline at end of file
+	script/test_btc_wire.sh
+	script/test_recover_db.sh
+\ No newline at end of file
diff --git a/script/test_btc_wire.sh b/script/test_btc_wire.sh
@@ -25,6 +25,7 @@ BTC_CLI="bitcoin-cli -regtest -datadir=$TEMP_DIR"
 echo  "---- Setup -----"
 
 echo "Reset database"
+sudo service postgresql start > /dev/null
 sudo -u postgres psql $DB_URL < wire-gateway/db/schema.sql > /dev/null
 echo "Start bitcoin node"
 bitcoind -datadir=$TEMP_DIR -txindex -regtest -fallbackfee=0.00000001 &> /dev/null &
diff --git a/script/test_gateway.sh b/script/test_gateway.sh
@@ -24,6 +24,7 @@ BANK_ENDPOINT=http://127.0.0.1:$PORT/
 echo  "---- Setup -----"
 
 echo "Reset database"
+sudo service postgresql start > /dev/null
 sudo -u postgres psql $DB_URL < wire-gateway/db/schema.sql > /dev/null
 echo "Start gateway"
 cargo build --bin wire-gateway --features test &> /dev/null
diff --git a/script/test_recover_db.sh b/script/test_recover_db.sh
@@ -0,0 +1,62 @@
+#!/bin/bash
+
+set -eu
+
+# Create temp file
+TEMP_FILE=$(mktemp)
+
+# Cleanup to run whenever we exit
+function cleanup() {
+    for n in `jobs -p`; do
+        kill $n 2> /dev/null || true
+    done
+    rm -f $TEMP_FILE
+    wait
+}
+
+# Install cleanup handler (except for kill -9)
+trap cleanup EXIT
+# Load conf file
+source <(grep = test.conf | sed 's/ *= */=/' | sed 's/=\(.*\)/="\1"/g1')
+
+BANK_ENDPOINT=http://127.0.0.1:$PORT/
+
+echo  "---- Setup -----"
+
+echo "Reset database"
+sudo service postgresql start > /dev/null
+sudo -u postgres psql $DB_URL < wire-gateway/db/schema.sql > /dev/null
+echo "Start gateway"
+cargo build --bin wire-gateway --features test &> /dev/null
+target/debug/wire-gateway &> /dev/null & 
+for n in `seq 1 50`; do
+    echo -n "."
+    sleep 0.2
+    curl -s $BANK_ENDPOINT -o /dev/null && break
+done
+echo ""
+
+echo "---- With DB -----"
+
+echo -n "Making wire transfer to exchange:"
+taler-exchange-wire-gateway-client -b $BANK_ENDPOINT -D payto://bitcoin/$ADDRESS -a BTC:0.000042 > /dev/null && echo " OK" || echo " Failed"
+echo -n "Requesting exchange incoming transaction list:"
+taler-exchange-wire-gateway-client -b $BANK_ENDPOINT -i | grep BTC:0.000042 > /dev/null && echo " OK" || echo " Failed"
+
+echo "---- Without DB -----"
+
+echo "Stop database"
+sudo service postgresql stop > /dev/null
+echo -n "Making wire transfer to exchange:"
+taler-exchange-wire-gateway-client -b $BANK_ENDPOINT -D payto://bitcoin/$ADDRESS -a BTC:0.000042 2>&1 | grep -q "504" && echo " OK" || echo " Failed"
+echo -n "Requesting exchange incoming transaction list:"
+taler-exchange-wire-gateway-client -b $BANK_ENDPOINT -i 2>&1 | grep -q "504" && echo " OK" || echo " Failed"
+
+echo "---- Recover DB -----"
+
+echo "Recovering database"
+sudo service postgresql start > /dev/null
+echo -n "Making wire transfer to exchange:"
+taler-exchange-wire-gateway-client -b $BANK_ENDPOINT -D payto://bitcoin/$ADDRESS -a BTC:0.000042 > /dev/null && echo " OK" || echo " Failed"
+echo -n "Requesting exchange incoming transaction list:"
+taler-exchange-wire-gateway-client -b $BANK_ENDPOINT -i | grep BTC:0.000042 > /dev/null && echo " OK" || echo " Failed"
diff --git a/test.conf b/test.conf
@@ -1,6 +1,6 @@
 [main]
 BASE_URL = test.com
-DB_URL   = postgres://localhost?user=postgres&password=password
+DB_URL   = postgres://localhost/postgres?user=postgres&password=password
 PORT     = 8060
 PAYTO    = payto://bitcoin/bcrt1qgkgxkjj27g3f7s87mcvjjsghay7gh34cx39prj
 ADDRESS  = mpTJZxWPerz1Gife6mQSdHT8mMuJK6FP85
 \ No newline at end of file
diff --git a/wire-gateway/Cargo.toml b/wire-gateway/Cargo.toml
@@ -32,6 +32,7 @@ rand = { version = "0.8.4", features = ["getrandom"] }
 url = { version = "2.2.2", features = ["serde"] }
 # Async postgres client
 tokio-postgres = { version = "0.7.5" }
+deadpool-postgres = "0.10.1"
 # Logging
 taler-log = { path = "../taler-log" }
 # Socket activation
diff --git a/wire-gateway/src/error.rs b/wire-gateway/src/error.rs
@@ -25,7 +25,7 @@ impl ServerError {
     }
 
     pub fn response(self) -> (Response<Body>, String) {
-        let mut builder = Response::builder().status(self.status);
+        let builder = Response::builder().status(self.status);
         let result = match self.content {
             Content::None => builder.body(Body::empty()),
             Content::Json(it) => builder
diff --git a/wire-gateway/src/main.rs b/wire-gateway/src/main.rs
@@ -1,15 +1,16 @@
 use configparser::ini::Ini;
+use deadpool_postgres::{Config, Pool, Runtime};
 use error::{CatchResult, ServerError};
 use hyper::{
     http::request::Parts,
     service::{make_service_fn, service_fn},
     Body, Method, Response, Server, StatusCode,
 };
-use json::parse_body;
+use json::{encode_body, parse_body};
 use listenfd::ListenFd;
-use std::{convert::Infallible, process::exit, str::FromStr, time::Instant};
+use std::{convert::Infallible, str::FromStr, time::Instant};
 use taler_log::log::{error, info, log, Level};
-use tokio_postgres::{Client, NoTls};
+use tokio_postgres::{config::Host, NoTls};
 use url::Url;
 use wire_gateway::{
     api_common::{Amount, SafeUint64, ShortHashCode, Timestamp},
@@ -20,11 +21,14 @@ use wire_gateway::{
     error_codes::ErrorCode,
 };
 
-use crate::json::encode_body;
-
 mod error;
 mod json;
 
+struct ServerState {
+    pool: Pool,
+    pay_to: String,
+}
+
 #[tokio::main]
 async fn main() {
     taler_log::init();
@@ -42,15 +46,33 @@ async fn main() {
     #[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();
+    // Parse postgres url
+    let config = tokio_postgres::Config::from_str(&db_url).unwrap();
+    // TODO find a way to clean this ugly mess
+    let mut cfg = 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();
 
-    tokio::spawn(async move {
-        if let Err(e) = connection.await {
-            error!("DB: {}", e);
-            exit(1);
-        }
-    });
-    let state = ServerState { client, pay_to };
+    let pool = cfg.create_pool(Some(Runtime::Tokio1), NoTls).unwrap();
+    let state = ServerState { pool, pay_to };
     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 {
@@ -99,11 +121,6 @@ async fn main() {
     }
 }
 
-struct ServerState {
-    client: Client,
-    pay_to: String,
-}
-
 /// Check if an url is a valid bitcoin payto url
 fn check_pay_to(url: &Url) -> bool {
     return url.domain() == Some("bitcoin")
@@ -181,9 +198,16 @@ async fn router(
                 ));
             }
             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", &[
+            let db = state.pool.get().await.catch_code(
+                StatusCode::GATEWAY_TIMEOUT,
+                ErrorCode::GENERIC_DB_FETCH_FAILED,
+            )?;
+            let row = db.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(), &state.pay_to,  &request.credit_account.to_string(), &request.exchange_base_url.to_string(), &0i16
-            ]).await.unwrap();
+            ]).await.catch_code(
+                StatusCode::BAD_GATEWAY,
+                ErrorCode::GENERIC_DB_FETCH_FAILED,
+            )?;
             encode_body(
                 parts,
                 StatusCode::OK,
@@ -202,15 +226,19 @@ async fn router(
             assert_method(&parts, Method::GET)?;
             let params = history_params(&parts)?;
             let filter = sql_history_filter(&params);
-
-            let transactions = state
-                .client
+            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
-                .unwrap()
+                .await.catch_code(
+                    StatusCode::BAD_GATEWAY,
+                    ErrorCode::GENERIC_DB_FETCH_FAILED,
+                )?
                 .into_iter()
                 .map(|row| IncomingBankTransaction::IncomingReserveTransaction {
                     row_id: {
@@ -243,14 +271,19 @@ async fn router(
             let params = history_params(&parts)?;
             let filter = sql_history_filter(&params);
 
-            let transactions = state
-                .client
+            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
-                .unwrap()
+                .await.catch_code(
+                    StatusCode::BAD_GATEWAY,
+                    ErrorCode::GENERIC_DB_FETCH_FAILED,
+                )?
                 .into_iter()
                 .map(|row| OutgoingBankTransaction {
                     row_id: {
@@ -286,9 +319,16 @@ async fn router(
             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", &[
+            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.to_string(), &"payto://bitcoin/bcrt1qgkgxkjj27g3f7s87mcvjjsghay7gh34cx39prj"
-            ]).await.unwrap();
+            ]).await.catch_code(
+                StatusCode::BAD_GATEWAY,
+                ErrorCode::GENERIC_DB_FETCH_FAILED,
+            )?;
             encode_body(
                 parts,
                 StatusCode::OK,

	depolymerization wire gateway for Bitcoin/Ethereum
	Log \| Files \| Refs \| Submodules \| README \| LICENSE

M	Cargo.lock	\|	3594	++++++++++++++++++++++++++++++++++++++++---------------------------------------
M	btc-wire/src/rpc_utils.rs	\|	2	--
M	makefile	\|	5	+++--
M	script/test_btc_wire.sh	\|	1	+
M	script/test_gateway.sh	\|	1	+
A	script/test_recover_db.sh	\|	62	++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
M	test.conf	\|	2	+-
M	wire-gateway/Cargo.toml	\|	1	+
M	wire-gateway/src/error.rs	\|	2	+-
M	wire-gateway/src/main.rs	\|	102	+++++++++++++++++++++++++++++++++++++++++++++++++++++++------------------------