From: Chris Duncan <chris@zoso.dev>
Date: Mon, 3 Mar 2025 14:56:20 +0000 (-0800)
Subject: Create DataView on hash message to enable setting endianness.
X-Git-Url: https://zoso.dev/?a=commitdiff_plain;h=d0d48c2182c35c69ef65be8d783bab5a0f9cf9fa;p=nano-pow.git

Create DataView on hash message to enable setting endianness.
---

diff --git a/src/classes/cpu.ts b/src/classes/cpu.ts
index 133b6ea..44fea21 100644
--- a/src/classes/cpu.ts
+++ b/src/classes/cpu.ts
@@ -14,6 +14,7 @@ export class NanoPowCpu {
 	static #blake2b_sigma: number[][]
 	static #v: BigUint64Array
 	static #m: BigUint64Array
+	static #mView: DataView
 
 	static async init (): Promise<void> {
 		if (this.#busy) return
@@ -45,6 +46,7 @@ export class NanoPowCpu {
 			]
 			this.#v = new BigUint64Array(16)
 			this.#m = new BigUint64Array(16)
+			this.#mView = new DataView(this.#m.buffer)
 			console.log(`NanoPow CPU initialized.`)
 		} catch (err) {
 			throw new Error('NanoPow CPU initialization failed.', { cause: err })
@@ -124,11 +126,11 @@ export class NanoPowCpu {
 		this.#v[12] ^= 40n // Output length
 
 		// Set up input buffers
-		this.#m[0] = seed
-		if (this.#debug) console.log(`seed: ${this.#m[0].toString(16).padStart(16, '0')}`)
+		this.#mView.setBigUint64(0, seed, true)
+		if (this.#debug) console.log(`seed: ${this.#m[0].toString(16).padStart(16, '0')} (${this.#m[0]})`)
 		for (let i = 0; i < hash.length; i += 16) {
 			const u64 = hash.slice(i, i + 16)
-			this.#m[i / 16 + 1] = BigInt(`0x${u64}`)
+			this.#mView.setBigUint64(i / 2 + 8, BigInt(`0x${u64}`))
 		}
 		if (this.#debug) console.log('m', this.#m)