Reserve lookup address for .sol domains

helper.ts

import fetch from "node-fetch";
export interface DomainLookupResponse {
    s:      string;
    result: {
        key:    string;
        domain: string;
    }[];
}
export async function getDomainFromAddress(address: string): Promise<string | null> {
    const url = `https://sns-sdk-proxy.bonfida.workers.dev/domains/${address}`;
    try {
        const response = await fetch(url);
        const json = await response.json() as DomainLookupResponse;
        return json.result[0].domain;
    } catch (e) {
        return null;
    }
}