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Latest 25 from a total of 636 transactions
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Approve | 20367471 | 44 days ago | IN | 0 ETH | 0.00014318 | ||||
Transfer | 19964281 | 100 days ago | IN | 0 ETH | 0.0003221 | ||||
Transfer | 16652618 | 565 days ago | IN | 0 ETH | 0.00121677 | ||||
Transfer | 16319685 | 611 days ago | IN | 0 ETH | 0.00045162 | ||||
Transfer | 16319683 | 611 days ago | IN | 0 ETH | 0.00045817 | ||||
Transfer | 16319681 | 611 days ago | IN | 0 ETH | 0.00047588 | ||||
Transfer | 16319680 | 611 days ago | IN | 0 ETH | 0.00044223 | ||||
Transfer | 16319675 | 611 days ago | IN | 0 ETH | 0.00045268 | ||||
Transfer | 16319668 | 611 days ago | IN | 0 ETH | 0.00046641 | ||||
Transfer | 16319631 | 611 days ago | IN | 0 ETH | 0.00046514 | ||||
Transfer | 16317523 | 611 days ago | IN | 0 ETH | 0.00043202 | ||||
Transfer | 16317513 | 611 days ago | IN | 0 ETH | 0.00043394 | ||||
Transfer | 16317502 | 611 days ago | IN | 0 ETH | 0.00042464 | ||||
Transfer | 16317436 | 612 days ago | IN | 0 ETH | 0.00044623 | ||||
Transfer | 16317425 | 612 days ago | IN | 0 ETH | 0.00040403 | ||||
Transfer | 16317344 | 612 days ago | IN | 0 ETH | 0.00071357 | ||||
Approve | 15947195 | 663 days ago | IN | 0 ETH | 0.00041922 | ||||
Approve | 15869966 | 674 days ago | IN | 0 ETH | 0.00122789 | ||||
Approve | 15578341 | 715 days ago | IN | 0 ETH | 0.00015295 | ||||
Approve | 15578339 | 715 days ago | IN | 0 ETH | 0.00015295 | ||||
Approve | 15262504 | 764 days ago | IN | 0 ETH | 0.00018252 | ||||
Approve | 14764222 | 846 days ago | IN | 0 ETH | 0.00255833 | ||||
Approve | 14663432 | 862 days ago | IN | 0 ETH | 0.00162788 | ||||
Approve | 14446462 | 896 days ago | IN | 0 ETH | 0.00181392 | ||||
Transfer | 13938689 | 974 days ago | IN | 0 ETH | 0.00289014 |
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Contract Name:
UBIcityERC20
Compiler Version
v0.6.9+commit.3e3065ac
Contract Source Code (Solidity)
/** *Submitted for verification at Etherscan.io on 2021-01-19 */ /* Copyright 2020 UBI.city SPDX-License-Identifier: Apache-2.0 */ pragma solidity 0.6.9; pragma experimental ABIEncoderV2; /** * @title SafeMath * @author CITYMAN * * @notice Math operations with safety checks that revert on error */ library SafeMath { function mul(uint256 a, uint256 b) internal pure returns (uint256) { if (a == 0) { return 0; } uint256 c = a * b; require(c / a == b, "MUL_ERROR"); return c; } function div(uint256 a, uint256 b) internal pure returns (uint256) { require(b > 0, "DIVIDING_ERROR"); return a / b; } function divCeil(uint256 a, uint256 b) internal pure returns (uint256) { uint256 quotient = div(a, b); uint256 remainder = a - quotient * b; if (remainder > 0) { return quotient + 1; } else { return quotient; } } function sub(uint256 a, uint256 b) internal pure returns (uint256) { require(b <= a, "SUB_ERROR"); return a - b; } function add(uint256 a, uint256 b) internal pure returns (uint256) { uint256 c = a + b; require(c >= a, "ADD_ERROR"); return c; } function sqrt(uint256 x) internal pure returns (uint256 y) { uint256 z = x / 2 + 1; y = x; while (z < y) { y = z; z = (x / z + z) / 2; } } } /** * @title UBI.city Token * @author CITYMAN */ contract UBIcityERC20 { using SafeMath for uint256; string public symbol = "CITY"; string public name = "UBICITY"; uint256 public decimals = 18; uint256 public totalSupply = 100000000 * 10**18; // 100 million mapping(address => uint256) internal balances; mapping(address => mapping(address => uint256)) internal allowed; // ============ Events ============ event Transfer(address indexed from, address indexed to, uint256 amount); event Approval(address indexed owner, address indexed spender, uint256 amount); // ============ Functions ============ constructor() public { balances[msg.sender] = totalSupply; } /** * @dev transfer token for a specified address * @param to The address to transfer to. * @param amount The amount to be transferred. */ function transfer(address to, uint256 amount) public returns (bool) { require(amount <= balances[msg.sender], "BALANCE_NOT_ENOUGH"); balances[msg.sender] = balances[msg.sender].sub(amount); balances[to] = balances[to].add(amount); emit Transfer(msg.sender, to, amount); return true; } /** * @dev Gets the balance of the specified address. * @param owner The address to query the the balance of. * @return balance An uint256 representing the amount owned by the passed address. */ function balanceOf(address owner) external view returns (uint256 balance) { return balances[owner]; } /** * @dev Transfer tokens from one address to another * @param from address The address which you want to send tokens from * @param to address The address which you want to transfer to * @param amount uint256 the amount of tokens to be transferred */ function transferFrom( address from, address to, uint256 amount ) public returns (bool) { require(amount <= balances[from], "BALANCE_NOT_ENOUGH"); require(amount <= allowed[from][msg.sender], "ALLOWANCE_NOT_ENOUGH"); balances[from] = balances[from].sub(amount); balances[to] = balances[to].add(amount); allowed[from][msg.sender] = allowed[from][msg.sender].sub(amount); emit Transfer(from, to, amount); return true; } /** * @dev Approve the passed address to spend the specified amount of tokens on behalf of msg.sender. * @param spender The address which will spend the funds. * @param amount The amount of tokens to be spent. */ function approve(address spender, uint256 amount) public returns (bool) { allowed[msg.sender][spender] = amount; emit Approval(msg.sender, spender, amount); return true; } /** * @dev Function to check the amount of tokens that an owner allowed to a spender. * @param owner address The address which owns the funds. * @param spender address The address which will spend the funds. * @return A uint256 specifying the amount of tokens still available for the spender. */ function allowance(address owner, address spender) public view returns (uint256) { return allowed[owner][spender]; } }
Contract Security Audit
- No Contract Security Audit Submitted- Submit Audit Here
[{"inputs":[],"stateMutability":"nonpayable","type":"constructor"},{"anonymous":false,"inputs":[{"indexed":true,"internalType":"address","name":"owner","type":"address"},{"indexed":true,"internalType":"address","name":"spender","type":"address"},{"indexed":false,"internalType":"uint256","name":"amount","type":"uint256"}],"name":"Approval","type":"event"},{"anonymous":false,"inputs":[{"indexed":true,"internalType":"address","name":"from","type":"address"},{"indexed":true,"internalType":"address","name":"to","type":"address"},{"indexed":false,"internalType":"uint256","name":"amount","type":"uint256"}],"name":"Transfer","type":"event"},{"inputs":[{"internalType":"address","name":"owner","type":"address"},{"internalType":"address","name":"spender","type":"address"}],"name":"allowance","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"address","name":"spender","type":"address"},{"internalType":"uint256","name":"amount","type":"uint256"}],"name":"approve","outputs":[{"internalType":"bool","name":"","type":"bool"}],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"address","name":"owner","type":"address"}],"name":"balanceOf","outputs":[{"internalType":"uint256","name":"balance","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"decimals","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"name","outputs":[{"internalType":"string","name":"","type":"string"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"symbol","outputs":[{"internalType":"string","name":"","type":"string"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"totalSupply","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"address","name":"to","type":"address"},{"internalType":"uint256","name":"amount","type":"uint256"}],"name":"transfer","outputs":[{"internalType":"bool","name":"","type":"bool"}],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"address","name":"from","type":"address"},{"internalType":"address","name":"to","type":"address"},{"internalType":"uint256","name":"amount","type":"uint256"}],"name":"transferFrom","outputs":[{"internalType":"bool","name":"","type":"bool"}],"stateMutability":"nonpayable","type":"function"}]
Contract Creation Code
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Deployed Bytecode
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Swarm Source
ipfs://c16e7204fa2ecc5a339a4f87dfa73ceb6a63b81c2cfb222859b9c9119da0cd64
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OVERVIEW
UBI.city is a decentralized organizational governance protocol which realizes the vision of UBI. UBI.city solves the problem of Sybil attacks and realizes the value of personal tokens by introducing Proof of Performance.Multichain Portfolio | 26 Chains
Chain | Token | Portfolio % | Price | Amount | Value |
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A contract address hosts a smart contract, which is a set of code stored on the blockchain that runs when predetermined conditions are met. Learn more about addresses in our Knowledge Base.