Generating the coupons

We've already got most of the work done for this in our coupons.js file that we created earlier and used in our tests.

Let's create a new script called generateCoupons.js in our scripts folder and fill it with the following code:

const { createCoupon } = require("./coupons");
const fs = require('fs');
require("dotenv").config();

// 1. Insert private key corresponding to _couponSigner
const privateKey = process.env.PRIVATE_KEY;

// 2. Populate with addresses to whitelist
let mint = [
    // Put all wallets that should be on the "mint" whitelist
];

let claim = [
    // put all wallets that should beon the "claim" whitelist
];

// 3. run `node scripts/generateCoupons.js

// 4. Signatures will be saved as coupons.json

const main = async () => {

  let output = [];

  console.log('Generating...');

  for (let i = 0; i < mint.length; i++) {
    let signature = await createCoupon(mint[i], 0, privateKey);
    output.push({
        wallet: mint[i],
        type: 'mint',
        r: signature.r,
        s: signature.s,
        v: signature.v
    })
  }

  for (let i = 0; i < claim.length; i++) {
    let signature = await createCoupon(claim[i], 1, privateKey);
    output.push({
        wallet: claim[i],
        type: 'claim',
        r: signature.r,
        s: signature.s,
        v: signature.v
    })
  }

  let data = JSON.stringify(output);
  fs.writeFileSync('coupons.json', data);
  console.log('Done.');
  console.log('Check the coupons.json file.');
};

const runMain = async () => {
  try {
    await main();
    process.exit(0);
  } catch (error) {
    console.log(error);
    process.exit(1);
  }
};

runMain();

You'll need to populate the mint and claim arrays with your list of wallets, and then run node run scripts/generateCoupons.js. This will generate your coupons and save them to a coupons.json file in a format that is convenient for serving behing a "coupons API" - which we'll cover below.