From: Chris Duncan <chris@zoso.dev>
Date: Sat, 4 Jan 2025 04:55:25 +0000 (-0800)
Subject: Do a bit reversal to create a psuedo random looking nonce even though it mathematical... 
X-Git-Url: https://zoso.dev/?a=commitdiff_plain;h=2900a835864a5573e55c4da3ffdcd0596179629d;p=libnemo.git

Do a bit reversal to create a psuedo random looking nonce even though it mathematically doesn't matter if it's truly random or not.
---

diff --git a/perf/block.perf.js b/perf/block.perf.js
index 79658c5..0fa1337 100644
--- a/perf/block.perf.js
+++ b/perf/block.perf.js
@@ -9,7 +9,7 @@ import { SendBlock } from '#dist/main.js'
 import 'nano-webgl-pow'
 
 await suite('Block performance', async () => {
-	const COUNT = 0x1
+	const COUNT = 0x10
 
 	await test(`Customized PoW: Time to calculate proof-of-work for a send block ${COUNT} times`, async () => {
 		const times = []
diff --git a/src/lib/workers/powgpu.ts b/src/lib/workers/powgpu.ts
index e19bf18..3ecadc6 100644
--- a/src/lib/workers/powgpu.ts
+++ b/src/lib/workers/powgpu.ts
@@ -154,7 +154,7 @@ export class PowGpu extends WorkerInterface {
 										(local_id.x & 0xff);
 			var m: array<u32, 16>;
 			m[0u] = id;
-			m[1u] = id;
+			m[1u] = reverseBits(id);
 			m[2u] = ubo.blockhash[0u].x;
 			m[3u] = ubo.blockhash[0u].y;
 			m[4u] = ubo.blockhash[0u].z;
@@ -164,7 +164,6 @@ export class PowGpu extends WorkerInterface {
 			m[8u] = ubo.blockhash[1u].z;
 			m[9u] = ubo.blockhash[1u].w;
 
-
 			/**
 			* Compression buffer, intialized to 2 instances of the initialization vector
 			* The following values have been modified from the BLAKE2B_IV:
@@ -190,11 +189,11 @@ export class PowGpu extends WorkerInterface {
 			/**
 			* Iterate and hash until nonce found
 			*/
-			for (var j: u32 = id; j < id + 1u; j = j + 1u) {
+			for (var j: u32 = 0u; j < 0x1u; j = j + 1u) {
 				if (atomicLoad(&work.found) != 0u) {
 					return;
 				}
-				m[0u] = j;
+				m[0u] = m[0u] ^ j;
 
 				// twelve rounds of mixing
 				for (var i: u32 = 0u; i < 12u; i = i + 1u) {
@@ -211,8 +210,8 @@ export class PowGpu extends WorkerInterface {
 				// Store the result directly into work array
 				if ((BLAKE2B_IV32_1 ^ v[1u] ^ v[17u]) > ubo.threshold) {
 					atomicStore(&work.found, 1u);
-					work.nonce.x = id;
-					work.nonce.y = j;
+					work.nonce.x = m[0];
+					work.nonce.y = m[1];
 					return;
 				}
 			}