truffle test

[cyl2chan]

I have problems going through the truffle test. May I know how to fix it please? It said

truffle(develop)> truffle test
Using network 'develop'.


Compiling your contracts...
===========================
> Compiling .\contracts\Migrations.sol
> Compiling .\contracts\dex.sol
> Compiling .\contracts\tokens.sol
> Compiling .\contracts\tokens.sol
> Compiling .\contracts\wallet.sol
> Artifacts written to C:\Users\ccy_s\AppData\Local\Temp\test--19012-BAvuMK8Y2iRM
> Compiled successfully using:
   - solc: 0.8.16+commit.07a7930e.Emscripten.clang
Error: Returned error: VM Exception while processing transaction: revert
    at module.exports (C:\Users\ccy_s\OneDrive\Documents\ethereum-201\ETH201_DEX\migrations\3_token_migration.js:10:13)
    at processTicksAndRejections (node:internal/process/task_queues:96:5)
    at Migration._deploy (C:\Users\ccy_s\AppData\Roaming\npm\node_modules\truffle\build\webpack:\packages\migrate\Migration.js:72:1)
    at Migration._load (C:\Users\ccy_s\AppData\Roaming\npm\node_modules\truffle\build\webpack:\packages\migrate\Migration.js:54:1)
    at Migration.run (C:\Users\ccy_s\AppData\Roaming\npm\node_modules\truffle\build\webpack:\packages\migrate\Migration.js:202:1)
    at Object.runMigrations (C:\Users\ccy_s\AppData\Roaming\npm\node_modules\truffle\build\webpack:\packages\migrate\index.js:142:1)
    at Object.runFrom (C:\Users\ccy_s\AppData\Roaming\npm\node_modules\truffle\build\webpack:\packages\migrate\index.js:107:1)
    at Object.runAll (C:\Users\ccy_s\AppData\Roaming\npm\node_modules\truffle\build\webpack:\packages\migrate\index.js:111:1)
    at Object.run (C:\Users\ccy_s\AppData\Roaming\npm\node_modules\truffle\build\webpack:\packages\migrate\index.js:84:1)
    at Object.run (C:\Users\ccy_s\AppData\Roaming\npm\node_modules\truffle\build\webpack:\packages\core\lib\testing\Test.js:114:1)
    at Object.module.exports [as run] (C:\Users\ccy_s\AppData\Roaming\npm\node_modules\truffle\build\webpack:\packages\core\lib\commands\test\run.js:115:1)
    at runCommand (C:\Users\ccy_s\AppData\Roaming\npm\node_modules\truffle\build\webpack:\packages\core\lib\command-utils.js:190:1)`

Below are my codes:

Migrations.sol:

// SPDX-License-Identifier: MIT
pragma solidity >=0.4.22 <0.9.0;

contract Migrations {
  address public owner = msg.sender;
  uint public last_completed_migration;

  modifier restricted() {
    require(
      msg.sender == owner,
      "This function is restricted to the contract's owner"
    );
    _;
  }

  function setCompleted(uint completed) public restricted {
    last_completed_migration = completed;
  }
}

dex.sol:

pragma solidity 0.8.16;
//SPDX-License-Identifier: UNLICENSED
pragma experimental ABIEncoderV2;

import "./wallet.sol";

//market order always take out order from orderbook
//limit order is always added into orderbook

contract Dex is Wallet {

    enum Side {
        BUY,
        SELL
    }

    struct Order {
        uint id;
        address trader;
        bool buyOrder;
        bytes32 ticker;
        uint amount;
        uint price;
    }

    mapping(bytes32 => mapping(uint => Order[])) public orderBook;  //bytes32 is the asset

    function getOrderBook(bytes32 ticker, Side side) view public returns(Order[] memory) {
        return orderBook[ticker][uint(side)];
    }

   // getOrderBook(bytes32("LINK"), Side.BUY)

   //function createLimitOrder() {

   //}

}

tokens.sol:

pragma solidity 0.8.16;
//SPDX-License-Identifier: UNLICENSED

import "../node_modules/@openzeppelin/contracts/token/ERC20/ERC20.sol";

contract Link is ERC20 {
    constructor() ERC20("Chainlink", "LINK") {
        _mint(msg.sender, 1000);
    }
}

wallet.sol:

 modifier tokenExist(bytes32 ticker){
        require(tokenMapping[ticker].tokenAddress != address(0));
        _;
    }

    function addToken(bytes32 ticker, address tokenAddress) onlyOwner external {
        tokenMapping[ticker] = Token(ticker, tokenAddress);
        tokenList.push(ticker);
    }

    function deposit(uint amount, bytes32 ticker) tokenExist(ticker) external {
        IERC20 (tokenMapping[ticker].tokenAddress).transferFrom(msg.sender, address(this), amount);
        balances[msg.sender][ticker] = balances[msg.sender][ticker].add(amount);
    }

    function withdraw(uint amount, bytes32 ticker) tokenExist(ticker) external {
        require(balances[msg.sender][ticker] >= amount, "Balances not sufficient");
        

        balances[msg.sender][ticker] = balances[msg.sender][ticker].sub(amount);
        IERC20(tokenMapping[ticker].tokenAddress).transfer(msg.sender, amount);
    }
}

wallettest.js:

const Dex = artifacts.require("Dex")
const Link = artifacts.require("Link")
const truffleAssert = requrie('truffle-assertions');

contract ("Dex", accounts => {
    it("should only be possible for owner to add tokens", async () => {
        let dex = await Dex.deployed()
        let link = await Link.deployed()
        await truffleAssert.passes(
            dex.addToken(web3.utils.fromUtf8("LINK"), link.address, {from: accounts[0]})
        )
    })   
})

[cyl2chan]

Anyone able to help pleaaaaase?

[apdan510]

@cyl2chan can you please share your code repo? I want to reproduce the error on my side. Thank you!
-Alex