sol-mem-gen/src/utils/verifyTweet.ts

import assert from 'assert';

import { AppDataSource } from '../data-source';
import { Payment } from '../entity/Payment';
import { Tweet } from '../entity/Tweets';

assert(process.env.NEXT_PUBLIC_SOLANA_RPC_URL, 'SOLANA_RPC_URL is required');

export async function verifySignatureInTweet(transactionSignature: string): Promise<boolean> {
  const paymentRepository = AppDataSource.getRepository(Payment);
  const payment = await paymentRepository.findOneBy({ transactionSignature });

  const tweetRepository = AppDataSource.getRepository(Tweet);
  const tweet = await tweetRepository.findOneBy({ transactionSignature });

  if (!payment) {
    return false;
  }

  if (tweet) {
    return false;
  }

  return true;
}