ETH Price: $1,587.27 (-0.37%)
Gas: 9 Gwei
 

Overview

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0 ETH

Eth Value

$0.00

Multi Chain

Multichain Addresses

1 address found via
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Method
Block
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Value
0x6060604054184542018-04-11 1:03:161992 days 17 hrs ago1523408596IN
 Contract Creation
0 ETH0.001025791

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Similar Match Source Code
This contract matches the deployed Bytecode of the Source Code for Contract 0xa75478...b775f6af
The constructor portion of the code might be different and could alter the actual behaviour of the contract

Contract Name:
Nonprofit

Compiler Version
v0.4.21+commit.dfe3193c

Optimization Enabled:
Yes with 200 runs

Other Settings:
default evmVersion
/**
 *Submitted for verification at Etherscan.io on 2019-07-17
*/

pragma solidity ^0.4.21;

interface tokenRecipient { function receiveApproval(address _from, uint256 _value, address _token, bytes _extraData) external; }

/// Contract for nonprofit tokens
contract Nonprofit {
    uint256 constant _decimals = 18;

    // Public variables of the token
    string public name;
    string public symbol;
    /// 18 decimals is the strongly suggested default, avoid changing it
    uint8 public decimals = uint8(_decimals);

    uint256 constant initialSupply = 10**24; // an arbitrary big number to represent infinity

    /// Does not include our "infinite" account
    uint256 public totalSupply;

    /// Total amount of Ether received
    uint256 public etherReceived;

    address owner; /// the creator of the contract, not public for more security

    // This creates an array with all balances
    mapping (address => uint256) public balanceOf;
    mapping (address => mapping (address => uint256)) public allowance;

    // This generates a public event on the blockchain that will notify clients
    event Transfer(address indexed from, address indexed to, uint256 value);

    event Approval(address indexed _owner, address indexed _spender, uint256 _value);


    // This notifies clients about the amount burnt
    event Burn(address indexed from, uint256 value);

    /**
     * Constructor function
     *
     * Initializes contract with infinite supply tokens to the creator of the contract
     */
    function Nonprofit(
        string tokenName,
        string tokenSymbol
    ) public {
        owner = msg.sender;
        totalSupply = 0;  // Update total supply with the decimal amount
        balanceOf[owner] = initialSupply * 10**_decimals; // arbitrary septillion of the token
        name = tokenName;                                   // Set the name for display purposes
        symbol = tokenSymbol;                               // Set the symbol for display purposes
    }

    /**
     * Change contract owner.
     */
    function setOwner(address _owner) public {
        require(msg.sender == owner);
        if(_owner == owner) return;
        totalSupply -= balanceOf[_owner];
        balanceOf[owner] = 0;
        balanceOf[_owner] = initialSupply * 10**_decimals;
        owner = _owner;
    }

    /**
     * Internal transfer, only can be called by this contract
     */
    function _transfer(address _from, address _to, uint _value) internal {
        // Prevent transfer to 0x0 address. Use burn() instead
        require(_to != 0x0);
        // Check if the sender has enough
        require(balanceOf[_from] >= _value);
        // Check for overflows
        require(balanceOf[_to] + _value >= balanceOf[_to]);
        if(_from != _to) {
            if(_from == owner) {
                uint256 newTotalSupply = totalSupply + _value;
                require(newTotalSupply >= totalSupply); // Check for overflows
                totalSupply = newTotalSupply;
            } else {
                balanceOf[_from] -= _value;
            }
            if(_to == owner) {
                assert(totalSupply >= _value);
                totalSupply -= _value;
            } else {
                uint256 newBalance = balanceOf[_to] + _value;
                require(newBalance >= balanceOf[_to]); // Check for overflows
                balanceOf[_to] = newBalance;
            }
        }
        emit Transfer(_from, _to, _value);
    }

    /**
     * Transfer tokens
     *
     * Send `_value` tokens to `_to` from your account
     *
     * @param _to The address of the recipient
     * @param _value the amount to send
     */
    function transfer(address _to, uint256 _value) public {
        _transfer(msg.sender, _to, _value);
    }

    /**
     * Transfer tokens from other address
     *
     * Send `_value` tokens to `_to` on behalf of `_from`
     *
     * @param _from The address of the sender
     * @param _to The address of the recipient
     * @param _value the amount to send
     */
    function transferFrom(address _from, address _to, uint256 _value) public returns (bool success) {
        require(_value <= allowance[_from][msg.sender]);     // Check allowance
        allowance[_from][msg.sender] -= _value;
        _transfer(_from, _to, _value);
        return true;
    }

    /**
     * Set allowance for other address
     *
     * Allows `_spender` to spend no more than `_value` tokens on your behalf
     *
     * @param _spender The address authorized to spend
     * @param _value the max amount they can spend
     */
    function approve(address _spender, uint256 _value) public
        returns (bool success)
    {
        allowance[msg.sender][_spender] = _value;
        emit Approval(msg.sender, _spender, _value);
        return true;
    }

    /**
     * Set allowance for other address and notify
     *
     * Allows `_spender` to spend no more than `_value` tokens on your behalf, and then ping the contract about it
     *
     * @param _spender The address authorized to spend
     * @param _value the max amount they can spend
     * @param _extraData some extra information to send to the approved contract
     */
    function approveAndCall(address _spender, uint256 _value, bytes _extraData)
        public
        returns (bool success)
    {
        tokenRecipient spender = tokenRecipient(_spender);
        if (approve(_spender, _value)) {
            spender.receiveApproval(msg.sender, _value, this, _extraData);
            return true;
        }
    }

    /**
     * Destroy tokens
     *
     * Remove `_value` tokens from the system irreversibly
     *
     * @param _value the amount of money to burn
     */
    function burn(uint256 _value) public returns (bool success) {
        if(msg.sender == owner) return true; // ignore
        require(balanceOf[msg.sender] >= _value);   // Check if the sender has enough
        balanceOf[msg.sender] -= _value;            // Subtract from the sender
        totalSupply -= _value;                      // Updates totalSupply
        emit Burn(msg.sender, _value);
        return true;
    }

    /**
     * Destroy tokens from other account
     *
     * Remove `_value` tokens from the system irreversibly on behalf of `_from`.
     *
     * @param _from the address of the sender
     * @param _value the amount of money to burn
     */
    function burnFrom(address _from, uint256 _value) public returns (bool success) {
        if(_from == owner) return true; // ignore
        require(balanceOf[_from] >= _value);                // Check if the targeted balance is enough
        require(_value <= allowance[_from][msg.sender]);    // Check allowance
        balanceOf[_from] -= _value;                         // Subtract from the targeted balance
        allowance[_from][msg.sender] -= _value;             // Subtract from the sender's allowance
        totalSupply -= _value;                              // Update totalSupply
        emit Burn(_from, _value);
        return true;
    }

    // Guards against integer overflows
//    function safeMultiply(uint256 a, uint256 b) internal pure returns (uint256) {
//        if (a == 0) {
//            return 0;
//        } else {
//            uint256 c = a * b;
//            assert(c / a == b);
//            return c;
//        }
//    }

    // Receive Ether

    /**
     * Accept payments in Ether and send in exchange e^2/(T+e) tokens where
     * e is the amount of Ether received in this payment and T is the total
     * amount of Ether received to our token before this payment.
     */
    function() public payable {
        if(msg.value == 0) {
            emit Transfer(0x0, msg.sender, 0);
        } else {
            uint256 newEtherReceived = etherReceived + msg.value;
            assert(newEtherReceived >= etherReceived);
            uint256 numberOfTokens = msg.value * msg.value / newEtherReceived;
            _transfer(owner, msg.sender, numberOfTokens);
            etherReceived = newEtherReceived;
            totalSupply = totalSupply + numberOfTokens;

            emit Transfer(0x0, msg.sender, numberOfTokens);
        }
    }

    /**
     * Withdraw Ether for nonprofit use.
     *
     * @param _address the address of the recipient (0 to use the default wallet)
     * @param _amount the amount to send (in wei)
     */
    function withdrawEther(address _address, uint256 _amount) public {
        require(msg.sender == owner);
        if(_address == 0)
            msg.sender.transfer(_amount);
        else
            _address.transfer(_amount);
    }
}

Contract Security Audit

Contract ABI

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Deployed Bytecode

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Deployed Bytecode Sourcemap

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Swarm Source

bzzr://ca0dc31fb8cd209f3e73a533e05e94fd9034b595c04fcbfb6a6a37417b247709

Block Transaction Difficulty Gas Used Reward
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Block Uncle Number Difficulty Gas Used Reward
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Txn Hash Block Value Eth2 PubKey Valid
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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.