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New default threshold for v21 local webGL pow #123

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New default threshold for v21 local webGL pow #123

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1cbf9f7
New default threshold for v21
Joohansson Jun 21, 2020
40b14ca
const correction
Joohansson Jun 29, 2020
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12 changes: 7 additions & 5 deletions src/assets/lib/pow/nano-webgl-pow.js
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Original file line number Diff line number Diff line change
Expand Up @@ -3,15 +3,17 @@
// Author: numtel <ben@latenightsketches.com>
// License: MIT

// window.NanoWebglPow(hashHex, callback, progressCallback);
// window.NanoWebglPow(hashHex, callback, progressCallback, threshold);
// @param hashHex String Previous Block Hash as Hex String
// @param callback Function Called when work value found
// Receives single string argument, work value as hex
// @param progressCallback Function Optional
// Receives single argument: n, number of frames so far
// Return true to abort
// @param threshold String Optional difficulty threshold (default=0xFFFFFFF8 since v21)

(function(){
const defaultThreshold = '0xFFFFFFF8'

function array_hex(arr, index, length) {
let out='';
Expand All @@ -29,7 +31,7 @@ function hex_reverse(hex) {
return out;
}

function calculate(hashHex, callback, progressCallback) {
function calculate(hashHex, callback, progressCallback, threshold = defaultThreshold) {
const canvas = document.createElement('canvas');

canvas.width = window.NanoWebglPow.width;
Expand Down Expand Up @@ -212,7 +214,7 @@ function calculate(hashHex, callback, progressCallback) {

// Threshold test, first 4 bytes not significant,
// only calculate digest of the second 4 bytes
if((BLAKE2B_IV32_1 ^ v[1] ^ v[17]) > 0xFFFFFFC0u) {
if((BLAKE2B_IV32_1 ^ v[1] ^ v[17]) > ` + threshold + `u) {
// Success found, return pixel data so work value can be constructed
fragColor = vec4(
float(x_index + 1u)/255., // +1 to distinguish from 0 (unsuccessful) pixels
Expand Down Expand Up @@ -287,7 +289,7 @@ function calculate(hashHex, callback, progressCallback) {

gl.uniform4uiv(work0Location, Array.from(work0));
gl.uniform4uiv(work1Location, Array.from(work1));

// Check with progressCallback every 100 frames
if(n%100===0 && typeof progressCallback === 'function' && progressCallback(n))
return;
Expand Down Expand Up @@ -328,4 +330,4 @@ window.NanoWebglPow = calculate;
window.NanoWebglPow.width = 256 * 2;
window.NanoWebglPow.height = 256 * 2;

})();
})();