From 67502b58c733b755f658f526aff0536828cd7757 Mon Sep 17 00:00:00 2001
From: Arnaud Bailly <arnaud.bailly@iohk.io>
Date: Wed, 9 Oct 2024 08:02:11 +0200
Subject: Derive seed for Rng from client id

---
 rust/src/web.rs | 13 ++++++++-----
 1 file changed, 8 insertions(+), 5 deletions(-)

diff --git a/rust/src/web.rs b/rust/src/web.rs
index 420d72c..de87ad6 100644
--- a/rust/src/web.rs
+++ b/rust/src/web.rs
@@ -2,7 +2,7 @@ use actix_web::{middleware::Logger, post, web, App, HttpResponse, HttpServer, Re
 use clap::Parser;
 use futures::lock::Mutex;
 use log::info;
-use proptest::test_runner::TestRunner;
+use proptest::test_runner::{Config, RngAlgorithm, TestRng, TestRunner};
 use rand::Rng;
 use serde::{Deserialize, Serialize};
 use std::time::Duration;
@@ -34,7 +34,6 @@ struct Client {
     url: String,
     grade: u8,
     runner: TestRunner,
-    seed: u64,
     results: Vec<TestResult>,
     delay: std::time::Duration,
 }
@@ -48,12 +47,16 @@ enum TestResult {
 
 impl Client {
     fn new(url: String) -> Self {
+        let id = Uuid::new_v4();
+        let runner = TestRunner::new_with_rng(
+            Config::default(),
+            TestRng::from_seed(RngAlgorithm::XorShift, &id.to_bytes_le()),
+        );
         Self {
-            id: Uuid::new_v4(),
+            id,
             url,
             grade: 1,
-            runner: TestRunner::deterministic(),
-            seed: 42,
+            runner,
             results: Vec::new(),
             delay: Duration::from_secs(10),
         }
-- 
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