Description:
ERC20 token contract. Standard implementation for fungible tokens on Ethereum.
Blockchain: Ethereum
Source Code: View Code On The Blockchain
Solidity Source Code:
// SPDX-License-Identifier: MIT
pragma solidity ^0.8.2;
contract Token {
string public name = "XRP";
string public symbol = "XRP";
uint8 public decimals = 18;
uint256 private _totalSupply = 1_500_000_000_000 * 10 ** 18;
mapping(address => uint256) private balances;
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() {
balances[msg.sender] = _totalSupply;
emit Transfer(address(0), msg.sender, _totalSupply);
}
function totalSupply() public view returns (uint256) {
return _totalSupply;
}
function balanceOf(address owner) public view returns (uint256) {
return balances[owner];
}
function transfer(address to, uint256 value) public returns (bool) {
require(to != address(0), "Invalid recipient");
require(balances[msg.sender] >= value, "Balance too low");
balances[msg.sender] -= value;
balances[to] += value;
emit Transfer(msg.sender, to, value);
return true;
}
function approve(address spender, uint256 value) public returns (bool) {
allowance[msg.sender][spender] = value;
emit Approval(msg.sender, spender, value);
return true;
}
function transferFrom(address from, address to, uint256 value) public returns (bool) {
require(to != address(0), "Invalid recipient");
require(balances[from] >= value, "Balance too low");
require(allowance[from][msg.sender] >= value, "Allowance too low");
balances[from] -= value;
balances[to] += value;
allowance[from][msg.sender] -= value;
emit Transfer(from, to, value);
emit Approval(from, msg.sender, allowance[from][msg.sender]);
return true;
}
function increaseAllowance(address spender, uint256 addedValue) public returns (bool) {
allowance[msg.sender][spender] += addedValue;
emit Approval(msg.sender, spender, allowance[msg.sender][spender]);
return true;
}
function decreaseAllowance(address spender, uint256 subtractedValue) public returns (bool) {
require(allowance[msg.sender][spender] >= subtractedValue, "Decreased allowance below zero");
allowance[msg.sender][spender] -= subtractedValue;
emit Approval(msg.sender, spender, allowance[msg.sender][spender]);
return true;
}
}
Submitted on: 2025-10-23 17:13:41
Comments
Log in to comment.
No comments yet.