@waku/rln/dist/utils/epoch.js

RLN (Rate Limiting Nullifier) implementation for Waku

import { Logger } from "@waku/utils";
const DefaultEpochUnitSeconds = 10; // the rln-relay epoch length in seconds
const log = new Logger("waku:rln:epoch");
export function dateToEpoch(timestamp, epochUnitSeconds = DefaultEpochUnitSeconds) {
    const time = timestamp.getTime();
    const epoch = Math.floor(time / 1000 / epochUnitSeconds);
    log.info("generated epoch", epoch);
    return epoch;
}
export function epochIntToBytes(epoch) {
    const bytes = new Uint8Array(32);
    const db = new DataView(bytes.buffer);
    db.setUint32(0, epoch, true);
    log.info("encoded epoch", epoch, bytes);
    return bytes;
}
export function epochBytesToInt(bytes) {
    const dv = new DataView(bytes.buffer, bytes.byteOffset, bytes.byteLength);
    const epoch = dv.getUint32(0, true);
    log.info("decoded epoch", epoch, bytes);
    return epoch;
}
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