25d677cbba
* fix(algorithms/fast): fix fast challenge on insecure contexts Closes #1192 Signed-off-by: Xe Iaso <me@xeiaso.net> * docs: update CHANGELOG Signed-off-by: Xe Iaso <me@xeiaso.net> --------- Signed-off-by: Xe Iaso <me@xeiaso.net>
90 lines
2.3 KiB
TypeScript
90 lines
2.3 KiB
TypeScript
type ProgressCallback = (nonce: number) => void;
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interface ProcessOptions {
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basePrefix: string;
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version: string;
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}
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const getHardwareConcurrency = () =>
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navigator.hardwareConcurrency !== undefined ? navigator.hardwareConcurrency : 1;
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export default function process(
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options: ProcessOptions,
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data: string,
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difficulty: number = 5,
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signal: AbortSignal | null = null,
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progressCallback?: ProgressCallback,
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threads: number = Math.trunc(Math.max(getHardwareConcurrency() / 2, 1)),
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): Promise<string> {
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console.debug("fast algo");
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// Choose worker based on secure context.
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// Use the WebCrypto worker if the page is a secure context; otherwise fall back to pure‑JS.
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let workerMethod: "webcrypto" | "purejs" = "purejs";
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if (window.isSecureContext) {
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workerMethod = "webcrypto";
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}
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if (navigator.userAgent.includes("Firefox") || navigator.userAgent.includes("Goanna")) {
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console.log("Firefox detected, using pure-JS fallback");
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workerMethod = "purejs";
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}
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return new Promise((resolve, reject) => {
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let webWorkerURL = `${options.basePrefix}/.within.website/x/cmd/anubis/static/js/worker/sha256-${workerMethod}.mjs?cacheBuster=${options.version}`;
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const workers: Worker[] = [];
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let settled = false;
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const onAbort = () => {
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console.log("PoW aborted");
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cleanup();
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reject(new DOMException("Aborted", "AbortError"));
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};
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const cleanup = () => {
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if (settled) {
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return;
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}
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settled = true;
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workers.forEach((w) => w.terminate());
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if (signal != null) {
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signal.removeEventListener("abort", onAbort);
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}
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};
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if (signal != null) {
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if (signal.aborted) {
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return onAbort();
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}
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signal.addEventListener("abort", onAbort, { once: true });
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}
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for (let i = 0; i < threads; i++) {
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let worker = new Worker(webWorkerURL);
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worker.onmessage = (event) => {
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if (typeof event.data === "number") {
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progressCallback?.(event.data);
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} else {
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cleanup();
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resolve(event.data);
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}
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};
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worker.onerror = (event) => {
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cleanup();
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reject(event);
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};
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worker.postMessage({
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data,
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difficulty,
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nonce: i,
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threads,
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});
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workers.push(worker);
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}
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});
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}
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