Deploying a contract to the Mezo testnet using Remix
Deploying contracts is sometimes necessary for retroactive activities. In this article, I will explain how to do this in the Mezo testnet using a simple ERC-20 token as an example.
1. First, we need Mats in Mezo, if you have already staked them in mezo.org/matsnet as required in the previous guide https://teletype.in/@coingonzo/mezo_testnet , then proceed to the next step
2. Add the network to the EVM wallet: https://chainlist.org/chain/31611
We will see BTC - these are our mats, which we will use for gas
3. Go here https://remix.ethereum.org/ and select the ERC-20 contract
4. In the contract files we find "MyToken.sol", erase everything from there and paste this there:
Change "CoinGonzo" and "GNZ"on your names
// SPDX-License-Identifier: MIT
pragma solidity ^0.8.20;
contract CoinGonzo {
// Token details
string public name = "CoinGonzo";
string public symbol = "GNZ";
uint8 public decimals = 18;
uint256 public totalSupply;
// Balances for each account
mapping(address => uint256) public balanceOf;
// Allowances for spending
mapping(address => mapping(address => uint256)) public allowance;
// Events
event Transfer(address indexed from, address indexed to, uint256 value);
event Approval(address indexed owner, address indexed spender, uint256 value);
// Constructor
constructor(uint256 initialSupply) {
totalSupply = initialSupply * (10 ** decimals); // Scale the supply based on decimals
balanceOf[msg.sender] = totalSupply; // Assign the entire supply to the deployer
emit Transfer(address(0), msg.sender, totalSupply);
}
// Transfer function
function transfer(address to, uint256 value) public returns (bool success) {
require(to != address(0), "Invalid address");
require(balanceOf[msg.sender] >= value, "Insufficient balance");
balanceOf[msg.sender] -= value;
balanceOf[to] += value;
emit Transfer(msg.sender, to, value);
return true;
}
// Approve allowance
function approve(address spender, uint256 value) public returns (bool success) {
require(spender != address(0), "Invalid address");
allowance[msg.sender][spender] = value;
emit Approval(msg.sender, spender, value);
return true;
}
// Transfer from (for allowances)
function transferFrom(address from, address to, uint256 value) public returns (bool success) {
require(to != address(0), "Invalid address");
require(balanceOf[from] >= value, "Insufficient balance");
require(allowance[from][msg.sender] >= value, "Allowance exceeded");
balanceOf[from] -= value;
balanceOf[to] += value;
allowance[from][msg.sender] -= value;
emit Transfer(from, to, value);
return true;
}
}
5. In the Solidity Compiler tab:
- Select the Compiler version 0.8.20 commit
- Click Advanced Configuration and select EVM VERSION - london
6. In the Deploy & run tab:
-In Environment, select Inject Provider - Metamask (If you are using another wallet, then click Custom this list and add the option you need for your wallet. For example: "Injected Provider - OKX Wallet" to do this via OKX)
- Next to the orange Deploy button, enter the desired number of tokens and click on this button, then sign the transaction
7. A green check mark will appear at the bottom. Open it and find the contract address, copy it and import the token into your wallet.
Adding a token for those who don't know:
Done, now you can send your token in the Mezo testnet! I think this activity will not go unnoticed by the drop checker)
https://t.me/coingonzo - Subscribe to learn about fresh activities in the testnet