From c7ff35fabebcbe5fa01d43912196f53eb1ccbb0d Mon Sep 17 00:00:00 2001
From: Kalle <38327916+Sendouc@users.noreply.github.com>
Date: Sun, 16 Aug 2026 10:03:37 +0300
Subject: [PATCH] Migrate invariant

---
 packages/tournament-engine/package.json              |  1 +
 packages/tournament-engine/src/create/seeding.ts     |  2 +-
 packages/tournament-engine/src/create/swiss.ts       |  2 +-
 .../src/propagation/report-result.ts                 |  2 +-
 packages/tournament-engine/src/propagation/set.ts    |  2 +-
 packages/tournament-engine/src/swiss/pairing.ts      |  3 ++-
 packages/tournament-engine/src/utils/invariant.ts    | 12 ------------
 pnpm-lock.yaml                                       |  3 +++
 8 files changed, 10 insertions(+), 17 deletions(-)
 delete mode 100644 packages/tournament-engine/src/utils/invariant.ts

diff --git a/packages/tournament-engine/package.json b/packages/tournament-engine/package.json
index 35401153a..6d2670625 100644
--- a/packages/tournament-engine/package.json
+++ b/packages/tournament-engine/package.json
@@ -10,6 +10,7 @@
 	},
 	"dependencies": {
 		"@sendou/in-game-lists": "workspace:*",
+		"@sendou/utils": "workspace:*",
 		"edmonds-blossom-fixed": "1.0.1",
 		"remeda": "2.39.0"
 	},
diff --git a/packages/tournament-engine/src/create/seeding.ts b/packages/tournament-engine/src/create/seeding.ts
index 350c657c1..e75593200 100644
--- a/packages/tournament-engine/src/create/seeding.ts
+++ b/packages/tournament-engine/src/create/seeding.ts
@@ -1,7 +1,7 @@
 // https://web.archive.org/web/20200601102344/https://tl.net/forum/sc2-tournaments/202139-superior-double-elimination-losers-bracket-seeding
 
+import invariant from "@sendou/utils/invariant";
 import type { OrderingMap, Seeding, SeedOrdering } from "../types";
-import invariant from "../utils/invariant";
 
 export const ordering: OrderingMap = {
 	natural: <T>(array: T[]) => [...array],
diff --git a/packages/tournament-engine/src/create/swiss.ts b/packages/tournament-engine/src/create/swiss.ts
index 95f0c2b31..d26f7c0df 100644
--- a/packages/tournament-engine/src/create/swiss.ts
+++ b/packages/tournament-engine/src/create/swiss.ts
@@ -1,3 +1,4 @@
+import invariant from "@sendou/utils/invariant";
 import { ENGINE_DEFAULTS } from "../constants";
 import type {
 	BracketData,
@@ -5,7 +6,6 @@ import type {
 	ResolvedCreateBracketInput,
 } from "../types";
 import { nullFilledArray } from "../utils/arrays";
-import invariant from "../utils/invariant";
 
 /**
  * Creates a Swiss bracket data set: all rounds up front, matches for round 1 only.
diff --git a/packages/tournament-engine/src/propagation/report-result.ts b/packages/tournament-engine/src/propagation/report-result.ts
index 20d3710cb..f4aac0fa4 100644
--- a/packages/tournament-engine/src/propagation/report-result.ts
+++ b/packages/tournament-engine/src/propagation/report-result.ts
@@ -1,5 +1,5 @@
+import invariant from "@sendou/utils/invariant";
 import type { BracketData, EngineResult, ReportResultInput } from "../types";
-import invariant from "../utils/invariant";
 import { Store } from "./store";
 import { Propagator } from "./traversal";
 
diff --git a/packages/tournament-engine/src/propagation/set.ts b/packages/tournament-engine/src/propagation/set.ts
index 70b1f73ef..0e4104659 100644
--- a/packages/tournament-engine/src/propagation/set.ts
+++ b/packages/tournament-engine/src/propagation/set.ts
@@ -1,6 +1,6 @@
+import invariant from "@sendou/utils/invariant";
 import { isSetOverByScore, matchEndedEarly } from "../status";
 import type { BracketData, EngineResult, MatchData, Side } from "../types";
-import invariant from "../utils/invariant";
 import { reportResult } from "./report-result";
 import { resetMatchResults } from "./reset-result";
 
diff --git a/packages/tournament-engine/src/swiss/pairing.ts b/packages/tournament-engine/src/swiss/pairing.ts
index d5b1e0a6f..4541a9df1 100644
--- a/packages/tournament-engine/src/swiss/pairing.ts
+++ b/packages/tournament-engine/src/swiss/pairing.ts
@@ -1,4 +1,6 @@
 /// <reference path="../edmonds-blossom.d.ts" />
+
+import invariant from "@sendou/utils/invariant";
 import blossom from "edmonds-blossom-fixed";
 import * as R from "remeda";
 import { swissRoundCount } from "../create/settings";
@@ -8,7 +10,6 @@ import type {
 	MatchData,
 	SwissStanding,
 } from "../types";
-import invariant from "../utils/invariant";
 import { err, ok, type Result } from "../utils/result";
 import { calculateTeamStatus } from "./team-status";
 
diff --git a/packages/tournament-engine/src/utils/invariant.ts b/packages/tournament-engine/src/utils/invariant.ts
deleted file mode 100644
index f321a91b7..000000000
--- a/packages/tournament-engine/src/utils/invariant.ts
+++ /dev/null
@@ -1,12 +0,0 @@
-// adapted from https://github.com/alexreardon/tiny-invariant, changed to show errors in production as well
-
-export default function invariant(
-	condition: any,
-	message?: string,
-): asserts condition {
-	if (condition) return;
-
-	const addition = message ? `: ${message}` : "";
-
-	throw new Error(`Invariant failed${addition}`);
-}
diff --git a/pnpm-lock.yaml b/pnpm-lock.yaml
index 06d032876..4db13a38d 100644
--- a/pnpm-lock.yaml
+++ b/pnpm-lock.yaml
@@ -353,6 +353,9 @@ importers:
       '@sendou/in-game-lists':
         specifier: workspace:*
         version: link:../in-game-lists
+      '@sendou/utils':
+        specifier: workspace:*
+        version: link:../utils
       edmonds-blossom-fixed:
         specifier: 1.0.1
         version: 1.0.1