A fairly simple snippet for MessageLatency plugin manipulation for Vencord. It doesn't use any Vencord-depending variables so you can use Vanilla Discord to troll others

messagelatency-manipulation.js

/** _changeLatency(days) to change your latency */
window._changeLatency = await (async () => {
    const NONCE_SHIFT = 14200704e5,
          SHOULD_MANIPULATE_SYMBOL = Symbol("should manipulate?"),
          ORIGINAL_NONCE_SYMBOL = Symbol("original nonce")
    
    const fromNonce = val => Math.floor(Number(val) / 4194304) + NONCE_SHIFT
    const toNonce = val => {
        let t = val - NONCE_SHIFT;
        return t <= 0 ? "0" : (BigInt(t) << 22n).toString()
    }

    const _XMLHttpRequest = window.XMLHttpRequest
    window.XMLHttpRequest = class extends _XMLHttpRequest {
        open(method, url) {
            if (url.includes("/channels/") && url.endsWith("/messages") && method === "POST") this[SHOULD_MANIPULATE_SYMBOL] = true
            return super.open(...arguments)
        }
        
        send(body) {
            if(typeof this[SHOULD_MANIPULATE_SYMBOL] !== "undefined") {
                const json = JSON.parse(body)
                
                this[ORIGINAL_NONCE_SYMBOL] = json.nonce

                // rounding fix
                const targetTimestamp = Date.now() - (daysDelay * 86400000);
                const t_intent_big = BigInt(targetTimestamp) - BigInt(NONCE_SHIFT);
                const temp_nonce_str = (t_intent_big << 22n).toString();
                const t_observed = Math.floor(Number(temp_nonce_str) / 4194304);
                const error = BigInt(t_observed) - t_intent_big;
                const t_adjusted_big = t_intent_big - error;
                const finalTimestamp = Number(t_adjusted_big + BigInt(NONCE_SHIFT));
                json.nonce = toNonce(finalTimestamp);
                
                body = JSON.stringify(json);
            }
            return super.send(body)
        }
        
        get responseText() {
            const str = super.responseText;
            if(typeof this[SHOULD_MANIPULATE_SYMBOL] !== "undefined") {
                const json = JSON.parse(str);
                json.nonce = this[ORIGINAL_NONCE_SYMBOL];
                return JSON.stringify(json)
            }
            return str;
        }
    }
    
    let daysDelay = 1337
    return (newValue) => {
        if (typeof newValue !== "number" || newValue < 0) return console.error("invalid value. please type a value number")
        daysDelay = newValue;
    }
})();

i need this