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erc20-wallace-token.sol
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erc20-wallace-token.sol
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// SPDX-License-Identifier: MIT
pragma solidity ^0.8.0;
contract WallaceCoin {
string public name = "WallaceCoin";
string public symbol = "WLC";
uint8 public decimals = 18;
uint256 public totalSupply = 1000000 * 10 ** uint256(decimals);
mapping(address => uint256) public balanceOf;
mapping(address => mapping(address => uint256)) public allowance;
event Transfer(address indexed from, address indexed to, uint256 value);
event Approval(address indexed owner, address indexed spender, uint256 value);
constructor() {
balanceOf[msg.sender] = totalSupply;
}
function transfer(address _to, uint256 _value) public returns (bool success) {
require(balanceOf[msg.sender] >= _value, "Insufficient balance");
balanceOf[msg.sender] -= _value;
balanceOf[_to] += _value;
emit Transfer(msg.sender, _to, _value);
return true;
}
function approve(address _spender, uint256 _value) public returns (bool success) {
allowance[msg.sender][_spender] = _value;
emit Approval(msg.sender, _spender, _value);
return true;
}
function transferFrom(address _from, address _to, uint256 _value) public returns (bool success) {
require(_value <= balanceOf[_from], "Insufficient balance");
require(_value <= allowance[_from][msg.sender], "Allowance exceeded");
balanceOf[_from] -= _value;
balanceOf[_to] += _value;
allowance[_from][msg.sender] -= _value;
emit Transfer(_from, _to, _value);
return true;
}
}