Minting Collateral Tokens (Optional)

For testing purposes, we'll use TEST collateral with the contracts deployed on Polygon. If you're testing on a live network, this step isn't necessary.

Minting TEST Tokens

First define the Collateral Token contract as a Web3 Instance:

const collateralABI = require('./abi/FakeStableCoinABI');
const collateralContract = new web3.eth.Contract(collateralABI, config.COLLATERAL_ADDRESS);

Where config.COLLATERAL_ADDRESS is the address for the TEST token defined in aconfig.js file.

You can mint TEST tokens by creating a function like below

async function mintCollateralTokens(amount) {
  try {
      const mintTx =, amount);
      //Gas Buffers
      let gas = await mintTx.estimateGas({from: account.address});
      let gasPrice = await web3.eth.getGasPrice();
      const gasBigInt = BigInt(gas);
      const gasPriceBigInt = BigInt(gasPrice);
      const increasedGasPrice = gasPriceBigInt * BigInt(120) / BigInt(100);
      const gasWithBuffer = gasBigInt + (gasBigInt * BigInt(20) / BigInt(100));
      const data = mintTx.encodeABI();
      const nonce = await web3.eth.getTransactionCount(account.address);

      const tx = {
          from: account.address,
          to: config.COLLATERAL_ADDRESS,
          gas: gasWithBuffer.toString(), 
          gasPrice: increasedGasPrice.toString(), 

      const signedTx = await web3.eth.accounts.signTransaction(tx, process.env.WALLET_PRIVATE_KEY);
      const receipt = await web3.eth.sendSignedTransaction(signedTx.rawTransaction);
      console.log("Tokens minted successfully. Transaction hash: ", receipt.transactionHash);
  } catch (error) {
      console.error("Error minting tokens: ", error);

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