find a nip19 key with specific prefix for using on Nostr

NostrKeyFinder.js

const {nip19, generatePrivateKey, getPublicKey} = require('nostr-tools');

let found = false;
let counter = 0;
while(!found){
    counter++;
    if(counter%100000 == 0){
        console.log('Reached iteration #' + counter.toLocaleString());
    }

    const sk = generatePrivateKey();
    const pk = getPublicKey(sk);
    const addr = nip19.npubEncode(pk);

    if(addr.indexOf('earthchie') === 4){
        found = true;
        console.log(counter, addr, pk, sk);
    }
    if(addr.indexOf('thanarat') === 4){
        found = true;
        console.log(counter, addr, pk, sk);
    }
}

npm i nostr-tools
node NostrKeyFinder.js