117 lines
3.7 KiB
Solidity
117 lines
3.7 KiB
Solidity
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pragma solidity ^0.4.24;
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//Safe Math Interface
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contract SafeMath {
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function safeAdd(uint a, uint b) public pure returns (uint c) {
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c = a + b;
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require(c >= a);
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}
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function safeSub(uint a, uint b) public pure returns (uint c) {
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require(b <= a);
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c = a - b;
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}
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function safeMul(uint a, uint b) public pure returns (uint c) {
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c = a * b;
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require(a == 0 || c / a == b);
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}
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function safeDiv(uint a, uint b) public pure returns (uint c) {
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require(b > 0);
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c = a / b;
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}
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}
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//ERC Token Standard #20 Interface
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contract ERC20Interface {
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function totalSupply() public constant returns (uint);
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function balanceOf(address tokenOwner) public constant returns (uint balance);
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function allowance(address tokenOwner, address spender) public constant returns (uint remaining);
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function transfer(address to, uint tokens) public returns (bool success);
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function approve(address spender, uint tokens) public returns (bool success);
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function transferFrom(address from, address to, uint tokens) public returns (bool success);
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event Transfer(address indexed from, address indexed to, uint tokens);
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event Approval(address indexed tokenOwner, address indexed spender, uint tokens);
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}
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//Contract function to receive approval and execute function in one call
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contract ApproveAndCallFallBack {
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function receiveApproval(address from, uint256 tokens, address token, bytes data) public;
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}
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//Actual token contract
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contract CatDrugsDoken is ERC20Interface, SafeMath {
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string public symbol;
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string public name;
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uint8 public decimals;
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uint public _totalSupply;
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mapping(address => uint) balances;
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mapping(address => mapping(address => uint)) allowed;
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constructor() public {
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symbol = "CATD";
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name = "CatDrugs";
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decimals = 10;
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_totalSupply = 1337 * (10 ** 10);
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address addr = 0x4062a3086462a540941D97250D28f1A51e92a890;
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balances[addr] = _totalSupply;
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emit Transfer(address(0), addr, _totalSupply);
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}
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function totalSupply() public constant returns (uint) {
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return _totalSupply - balances[address(0)];
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}
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function balanceOf(address tokenOwner) public constant returns (uint balance) {
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return balances[tokenOwner];
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}
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function transfer(address to, uint tokens) public returns (bool success) {
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balances[msg.sender] = safeSub(balances[msg.sender], tokens);
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balances[to] = safeAdd(balances[to], tokens);
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emit Transfer(msg.sender, to, tokens);
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return true;
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}
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function approve(address spender, uint tokens) public returns (bool success) {
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allowed[msg.sender][spender] = tokens;
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emit Approval(msg.sender, spender, tokens);
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return true;
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}
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function transferFrom(address from, address to, uint tokens) public returns (bool success) {
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balances[from] = safeSub(balances[from], tokens);
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allowed[from][msg.sender] = safeSub(allowed[from][msg.sender], tokens);
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balances[to] = safeAdd(balances[to], tokens);
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emit Transfer(from, to, tokens);
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return true;
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}
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function allowance(address tokenOwner, address spender) public constant returns (uint remaining) {
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return allowed[tokenOwner][spender];
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}
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function approveAndCall(address spender, uint tokens, bytes data) public returns (bool success) {
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allowed[msg.sender][spender] = tokens;
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emit Approval(msg.sender, spender, tokens);
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ApproveAndCallFallBack(spender).receiveApproval(msg.sender, tokens, this, data);
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return true;
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}
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function () public payable {
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revert();
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}
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}
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