forked from tornado-packages/tornado-core
33 lines
877 B
TypeScript
33 lines
877 B
TypeScript
import { BabyJub, PedersenHash, Point, buildPedersenHash } from 'circomlibjs';
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export class Pedersen {
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pedersenHash?: PedersenHash;
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babyJub?: BabyJub;
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pedersenPromise: Promise<void>;
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constructor() {
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this.pedersenPromise = this.initPedersen();
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}
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async initPedersen() {
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this.pedersenHash = await buildPedersenHash();
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this.babyJub = this.pedersenHash.babyJub;
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}
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async unpackPoint(buffer: Uint8Array) {
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await this.pedersenPromise;
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return this.babyJub?.unpackPoint(this.pedersenHash?.hash(buffer) as Uint8Array);
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}
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toStringBuffer(buffer: Uint8Array): string {
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return this.babyJub?.F.toString(buffer);
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}
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}
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export const pedersen = new Pedersen();
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export async function buffPedersenHash(buffer: Uint8Array): Promise<string> {
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const [hash] = (await pedersen.unpackPoint(buffer)) as Point;
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return pedersen.toStringBuffer(hash);
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}
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