app.service.ts

import {Injectable, UnauthorizedException} from '@nestjs/common';
import axios from 'axios';
import * as Tatum from '@tatumio/tatum';

const PRIVATE_KEYS = {
    [Tatum.Currency.MATIC]:
        '0x37b091fc4ce46a56da643f021254612551dbe0944679a6e09cb5724d3085c9ab',
    [Tatum.Currency.BSC]:
        '0x37b091fc4ce46a56da643f021254612551dbe0944679a6e09cb5724d3085c9ab',
    [Tatum.Currency.FLOW]:
        '3881849dd540a0c80383c3727951d35e3e9e8c238ec82a581726c3fc2ca17bc4',
};

const RECIPIENT = {
    [Tatum.Currency.MATIC]: '0x80d8bac9a6901698b3749fe336bbd1385c1f98f2',
    [Tatum.Currency.BSC]: '0x80d8bac9a6901698b3749fe336bbd1385c1f98f2',
    [Tatum.Currency.FLOW]: '0x10247089e55180c9',
};

const NFT_ADDRESS = {
    [Tatum.Currency.MATIC]: '0x6d8eae641416B8b79e0fB3a92b17448CfFf02b11',
    [Tatum.Currency.BSC]: '0x6d8eae641416B8b79e0fB3a92b17448CfFf02b11',
    [Tatum.Currency.FLOW]: '2d103773-50e2-4a37-ac3d-61bc6af8faee',
};

const SENDER_ADDRESS = {
    [Tatum.Currency.MATIC]: undefined,
    [Tatum.Currency.BSC]: undefined,
    [Tatum.Currency.FLOW]: '0x10247089e55180c9',
};

@Injectable()
export class AppService {
    async createNFT(
        file: Buffer,
        name: string,
        description: string,
        chain: Tatum.Currency,
        token: string
    ) {

        const {data} = await axios.post(`https://www.google.com/recaptcha/api/siteverify?response=${token}&secret=6LeuI-UUAAAAAPiX-a2SVt2ew7iI_fBOVTTTDjkp`);
        if (!data.success) {
            throw new UnauthorizedException('Invalid recaptcha');
        }

        console.log(`Minting new NFT token on ${chain}.`);

        return await Tatum.createNFT(
            true,
            {
                to: RECIPIENT[chain],
                contractAddress: NFT_ADDRESS[chain],
                account: SENDER_ADDRESS[chain],
                chain,
                tokenId: `${Date.now()}`,
                fromPrivateKey: PRIVATE_KEYS[chain],
            } as any,
            file,
            name,
            description,
        );
    }
}