# ERC-20 smart contract

### Créez votre propre token 

Comme bonne pratique, vous pouvez choisir de créer votre propre token en utilisant [le modèle standard ERC-20](https://ethereum.org/en/developers/docs/standards/tokens/erc-20/). 

Utilisez le contrat intelligent suivant dans l'éditeur de code de votre choix, personnalisez votre cryptomonnaie, et compilez votre code après avoir approuvé la connexion en utilisant votre portefeuille numérique préféré (ici, le portefeuille MetaMask est utilisé). 

### Contrat intelligent ERC-20

{% code lineNumbers="true" %}

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

interface IERC20 {
    event Transfer(address indexed from, address indexed to, uint256 value);
    event Approval(address indexed owner, address indexed spender, uint256 value);
    function totalSupply() external view returns (uint256);
    function balanceOf(address account) external view returns (uint256);
    function transfer(address to, uint256 amount) external returns (bool);
    function allowance(address owner, address spender) external view returns (uint256);
    function approve(address spender, uint256 amount) external returns (bool);
    function transferFrom(address from, address to, uint256 amount) external returns (bool);
}

contract SampleERC20Token is IERC20 {
    string public symbol;
    string public  name;
    uint8 public decimals;
    uint public _totalSupply;
    mapping(address => uint) balances;
    mapping(address => mapping(address => uint)) allowed;

    constructor() {
        symbol = "SYM";
        name = "Sample ERC20 Token";
        decimals = 2;
        _totalSupply = 100000;
        balances[msg.sender] = _totalSupply;
        emit Transfer(address(0), msg.sender, _totalSupply);
 Personnalisez et utilisez le contrat intelligent ERC-20 pour créer un jeton.   }
    function totalSupply() external view returns (uint) {
        return _totalSupply  - balances[address(0)];
    }
    function balanceOf(address tokenOwner) external view returns (uint balance) {
        return balances[tokenOwner];
    }
    function transfer(address to, uint tokens) public returns (bool success) {
        balances[msg.sender] = balances[msg.sender] - tokens;
        balances[to] = balances[to] + tokens;
        emit Transfer(msg.sender, to, tokens);
        return true;
    }
    function approve(address spender, uint tokens) public returns (bool success) {
        allowed[msg.sender][spender] = tokens;
        emit Approval(msg.sender, spender, tokens);
        return true;
    }
    function transferFrom(address from, address to, uint tokens) public returns (bool success) {
        balances[from] = balances[from] - tokens;
        allowed[from][msg.sender] = allowed[from][msg.sender] - tokens;
        balances[to] = balances[to] + tokens;
        emit Transfer(from, to, tokens);
        return true;
    }
    function allowance(address tokenOwner, address spender) external view returns (uint remaining) {
        return allowed[tokenOwner][spender];
    }
}
```

{% endcode %}


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