player_template.ts

import { Data, fromText, Lucid } from "https://deno.land/x/lucid@0.10.7/mod.ts";
import { HelloRedeemer } from "./types.ts";
import {
  awaitTxConfirms,
  getFormattedTxDetails,
} from "../../common/offchain/utils.ts";
import { GameData, TestData } from "./task.ts";

export async function play(
  lucid: Lucid,
  gameData: GameData,
): Promise<TestData> {
  /**
   * The smart contracts are already deployed, see the [run.ts] file for more details.
   * The [gameData] variable contains all the things you need to interact with the vulnerable smart contracts.
   */

  // This is just a sanity check, so you do not have to change much here to pass the tests
  // Check the validator code to find out how to unlock the locked ADA!
  // The following code fails, read the validator carefully to find out why?
  // Hint base64: TG9vayBhdCB0aGUgcmVkZWVtZXIu

  // We find the contract UTxO where the ADA is locked
  // We create the redeemer

  // ================ YOUR CODE STARTS HERE
  // We unlock the locked UTxO using the redeemer "Hello, World!".
  console.log(`Building a transaction to unlock the locked script UTxO`);

  const redeemer = Data.to({ msg: fromText("Hello, World!") }, HelloRedeemer);
  const utxo = gameData.scriptUtxo;
  const scriptValidator = gameData.scriptValidator;

  const tx = await lucid
    .newTx()
    .collectFrom([utxo], redeemer)
    .attachSpendingValidator(scriptValidator)
    .complete();

  const signedTx = await tx
    .sign()
    .complete();

  const unlockTxHash = await signedTx.submit();

  console.log(
    `UTxO was successfuly unlocked ${
      getFormattedTxDetails(unlockTxHash, lucid)
    }`,
  );

  // We await the transaction confirmations.
  await awaitTxConfirms(lucid, unlockTxHash);

  // ================ YOUR CODE ENDS HERE
}