From: Chris Duncan <chris@zoso.dev>
Date: Sun, 6 Jul 2025 08:03:33 +0000 (-0700)
Subject: Validate PoW before committing to block.
X-Git-Tag: v0.10.5~103
X-Git-Url: https://git.codecow.com/?a=commitdiff_plain;h=0c7547f311806601e4572030bec4ecce59a682eb;p=libnemo.git

Validate PoW before committing to block.
---

diff --git a/src/lib/block.ts b/src/lib/block.ts
index d430bed..3686e3c 100644
--- a/src/lib/block.ts
+++ b/src/lib/block.ts
@@ -91,6 +91,13 @@ abstract class Block {
 		if ('error' in result) {
 			throw new Error('Failed to generate work', { cause: result.error })
 		}
+		const check = await NanoPow.work_validate(result.work, this.previous, { difficulty })
+		if ('error' in check) {
+			throw new Error('Failed to validate work generated', { cause: check.error })
+		}
+		if (check.valid === '0') {
+			throw new Error('Wwork generated is invalid', { cause: `${check.difficulty} < ${difficulty}` })
+		}
 		this.work = result.work
 	}
 
diff --git a/test/test.calculate-pow.mjs b/test/test.calculate-pow.mjs
index da742b8..a2d90ed 100644
--- a/test/test.calculate-pow.mjs
+++ b/test/test.calculate-pow.mjs
@@ -19,6 +19,7 @@ await suite('Calculate proof-of-work', async () => {
 			NANO_TEST_VECTORS.SEND_BLOCK.previous
 		)
 		await block.pow()
+
 		assert.equals(block.previous.length, 64)
 		assert.equals(block.work?.length, 16)
 
@@ -39,6 +40,7 @@ await suite('Calculate proof-of-work', async () => {
 			.update(bytes)
 			.digest('hex')
 			.slice(8, 16)
+
 		assert.ok(parseInt(hash.slice(0, 2), 16) > 0xf0)
 		assert.equals(parseInt(hash.slice(2, 8), 16), 0xffffff)
 	})