From f5ea3ffe497f2867854f306f1103ade3e875ed56 Mon Sep 17 00:00:00 2001
From: Chris Duncan <chris@codecow.com>
Date: Thu, 21 May 2026 10:45:54 -0700
Subject: [PATCH] Delete invalid work from cache if it was somehow stored.

---
 src/lib/index.ts   | 11 ++++++++++-
 src/utils/cache.ts | 13 +++++++++++++
 2 files changed, 23 insertions(+), 1 deletion(-)

diff --git a/src/lib/index.ts b/src/lib/index.ts
index 3deb723..bbc0dd5 100644
--- a/src/lib/index.ts
+++ b/src/lib/index.ts
@@ -18,7 +18,16 @@ export async function work_generate (hash: unknown, options?: unknown): Promise<
 			const cached = Cache.search(hash, difficulty)
 			if (cached) {
 				LOG: logger.log('found work in cache')
-				return cached
+				const { valid } = NanoPowValidate(bigintFrom(cached.work, 'hex'), bigintFrom(cached.hash, 'hex'), bigintFrom(cached.difficulty, 'hex'), debug)
+				if (valid === '1') {
+					return cached
+				} else {
+					try {
+						Cache.delete(hash)
+					} catch (err) {
+						LOG: logger.log('error deleting invalid work from cache, continuing with generate', err)
+					}
+				}
 			}
 			switch (api) {
 				case 'webgpu': {
diff --git a/src/utils/cache.ts b/src/utils/cache.ts
index 5d446f8..24d0e0e 100644
--- a/src/utils/cache.ts
+++ b/src/utils/cache.ts
@@ -10,6 +10,19 @@ export class Cache {
 		this.#removeItem('NanoPowCache')
 	}
 
+	static delete (hash: unknown): void {
+		const bigintHash = bigintFrom(hash, 'hex')
+		const item = this.#getItem('NanoPowCache')
+		if (item == null) return
+		const cache = JSON.parse(item) as WorkGenerateResponse[]
+		for (let i = 0; i < cache.length; i++) {
+			if (bigintFrom(cache[i].hash, 'hex') === bigintHash) {
+				cache.splice(i, 1)
+			}
+		}
+		this.#setItem('NanoPowCache', JSON.stringify(cache))
+	}
+
 	static search (hash: unknown, difficulty: bigint): WorkGenerateResponse | null {
 		const bigintHash = bigintFrom(hash, 'hex')
 		const item = this.#getItem('NanoPowCache')
-- 
2.52.0