ERC20 token not deploying on Remix

I have 3 contracts but they are not deploying on remix.ethereum.org

pragma solidity ^0.6.7;


contract Owned {
    modifier onlyOwner() {
        require(msg.sender==owner);
        _;
    }
    address payable owner;
    address payable newOwner;
    function changeOwner(address payable _newOwner) public onlyOwner {
        require(_newOwner!=address(0));
        newOwner = _newOwner;
    }
    function acceptOwnership() public {
        if (msg.sender==newOwner) {
            owner = newOwner;
        }
    }
}

abstract contract ERC20 {
    uint256 public totalSupply;
    function balanceOf(address _owner) view public virtual returns (uint256 balance);
    function transfer(address _to, uint256 _value) public virtual returns (bool success);
    function transferFrom(address _from, address _to, uint256 _value) public virtual returns (bool success);
    function approve(address _spender, uint256 _value) public virtual returns (bool success);
    function allowance(address _owner, address _spender) view public virtual returns (uint256 remaining);
    event Transfer(address indexed _from, address indexed _to, uint256 _value);
    event Approval(address indexed _owner, address indexed _spender, uint256 _value);
}

contract Token is Owned,  ERC20 {
    string public symbol;
    string public name;
    uint8 public decimals;
    mapping (address=>uint256) balances;
    mapping (address=>mapping (address=>uint256)) allowed;
    
    function balanceOf(address _owner) view public virtual override returns (uint256 balance) {return balances[_owner];}
    
    function transfer(address _to, uint256 _amount) public virtual override returns (bool success) {
        require (balances[msg.sender]>=_amount&&_amount>0&&balances[_to]+_amount>balances[_to]);
        balances[msg.sender]-=_amount;
        balances[_to]+=_amount;
        emit Transfer(msg.sender,_to,_amount);
        return true;
    }
  
    function transferFrom(address _from,address _to,uint256 _amount) public virtual override returns (bool success) {
        require (balances[_from]>=_amount&&allowed[_from][msg.sender]>=_amount&&_amount>0&&balances[_to]+_amount>balances[_to]);
        balances[_from]-=_amount;
        allowed[_from][msg.sender]-=_amount;
        balances[_to]+=_amount;
        emit Transfer(_from, _to, _amount);
        return true;
    }
  
    function approve(address _spender, uint256 _amount) public virtual override returns (bool success) {
        allowed[msg.sender][_spender]=_amount;
        emit Approval(msg.sender, _spender, _amount);
        return true;
    }
    
    function allowance(address _owner, address _spender) view public virtual override returns (uint256 remaining) {
      return allowed[_owner][_spender];
    }
}

contract YFIVE_FINANCE is Token{
    
    constructor() public{
        symbol = "YFIVE";
        name = "YFIVE.FINANCE";
        decimals = 18;
        totalSupply = 33000000000000000000000;  
        owner = msg.sender;
        balances[owner] = totalSupply;
    }
    
    receive () payable external {
        require(msg.value>0);
        owner.transfer(msg.value);
    }
}
1 Like

Hi @Timbrian1234,

Welcome to the community :wave:

As well as this post, you have posted two other token contracts:


I am not sure what the “No worker” error was that you were receiving. Can you post a screen shot?

Taking a step back, you seem to be wanting to deploy a simple token with the total supply minted to the deployer of the contract.

The following is an example using OpenZeppelin Contracts imported via GitHub:

// SPDX-License-Identifier: MIT
pragma solidity ^0.6.2;

import "https://github.com/OpenZeppelin/openzeppelin-contracts/blob/v3.2.0/contracts/token/ERC20/ERC20.sol";

contract Token is ERC20 {

    constructor () public ERC20("Token", "TKN") {
        _mint(msg.sender, 1000000 * (10 ** uint256(decimals())));
    }
}

For a mintable, pausable and burnable token you can follow: Create an ERC20 using Remix, without writing Solidity

Hi @Timbrian1234,

Were you able to deploy on Remix using: Create an ERC20 using Remix, without writing Solidity?

No. Can you help me test both on your remix.ethereum.org. Anyone that deploys. Please send it to me. I’d really appreciate it @abcoathup Thanks alot. I don’t know how to import openzeppelin in the contract. But if you help me add it to any of the contract. I can just copy it to my remix.ethereum.org and deploy it

1 Like

Hi @Timbrian1234,

I recommend following the tutorial to deploy a token locally: Create an ERC20 using Remix, without writing Solidity

Once you have done that you could try the following simple token:

// SPDX-License-Identifier: MIT
pragma solidity ^0.6.2;

import "https://github.com/OpenZeppelin/openzeppelin-contracts/blob/v3.2.0/contracts/token/ERC20/ERC20.sol";

contract Token is ERC20 {

    constructor () public ERC20("Token", "TKN") {
        _mint(msg.sender, 1000000 * (10 ** uint256(decimals())));
    }
}

Is there a video tutorial on YouTube?? I went through it immediately but I was confused. @abcoathup Thanks alot

Can I add the staking and yield Farming contract code to ERC20PRESETMINTPAUSER

1 Like

Hi @Timbrian1234,

There isn’t a YouTube tutorial. Feel free to ask all the questions that you need.

Hi @Timbrian1234,

I am not familiar with the smart contract code for staking and yield farming.
I assume that you can use the Preset ERC20 contract and then create contracts for staking rewards.

Okay is there an OpenZappelin Github contract for only PRESETBURN without MINTING

1 Like

Hi @Timbrian1234,

There isn’t a preset ERC20 with fixed supply currently with burn.
I have created an issue proposing that there could be one added: https://github.com/OpenZeppelin/openzeppelin-contracts/issues/2377

You could try something like the following.

:warning: The following code hasn’t been tested or audited.

// SPDX-License-Identifier: MIT
pragma solidity ^0.6.2;

import "@openzeppelin/contracts/token/ERC20/ERC20.sol";
import "@openzeppelin/contracts/token/ERC20/ERC20Burnable.sol";

contract ERC20FixedSupply is ERC20, ERC20Burnable {
    constructor(
        string memory name,
        string memory symbol,
        uint256 initialSupply
    ) public ERC20(name, symbol) {
        _mint(msg.sender, initialSupply);
    }
}