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// This contract is part of Zellic’s smart contract dataset, which is a collection of publicly available contract code gathered as of March 2023.
pragma solidity ^0.8.17;
contract PreMergeToken {
string public name = "Pre Merge Token";
string public symbol = "PREM";
uint8 public decimals = 18;
uint256 public totalSupply = 42000000e18;
mapping (address => uint256) private balances;
mapping (address => mapping (address => uint256)) private allowed;
event Transfer(
address indexed from,
address indexed to,
uint256 value
);
event Approval(
address indexed owner,
address indexed spender,
uint256 value
);
constructor ()
{
balances[msg.sender] = totalSupply;
emit Transfer(address(0), msg.sender, totalSupply);
}
function balanceOf(address owner)
public
view
returns (uint256)
{
return balances[owner];
}
function allowance(address owner, address spender)
public
view
returns (uint256)
{
return allowed[owner][spender];
}
function transfer(address to, uint256 value)
public
returns (bool)
{
require(balances[msg.sender] >= value);
require(balances[to] + value >= balances[to]);
balances[msg.sender] = balances[msg.sender] - value;
balances[to] = balances[to] + value;
emit Transfer(msg.sender, to, value);
return true;
}
function approve(address spender, uint256 value)
public
returns (bool)
{
require(spender != address(0));
allowed[msg.sender][spender] = value;
emit Approval(msg.sender, spender, value);
return true;
}
function transferFrom(address from, address to, uint256 value)
public
returns (bool)
{
require(balances[from] >= value);
require(allowed[from][msg.sender] >= value);
require(balances[to] + value >= balances[to]);
balances[from] = balances[from] - value;
balances[to] = balances[to] + value;
allowed[from][msg.sender] = allowed[from][msg.sender] - value;
emit Transfer(from, to, value);
return true;
}
} |