Contract Overview
Balance: 0.080024033499555911 Ether
Transactions: 6 txns
 Latest 6 txns

TxHash Age From To Value [TxFee]
0x4a1a6f4a8106c33d27869e663b61ad2be74ae79d4f5b72dadaf7a263649c38f2134 days 10 hrs ago0x5479a9ec6386db424b563ef059fc127042543a5d  IN   0x90f6c344e7d984f332c22266ef426e9727ca372c0.01 Ether0.000043529
0x1c11aff35a8c6a2afd7f0b135bbb836879651c05732b243979d9d44570d48463173 days 6 hrs ago0xb9fedb203920981e26d84a4dea867b4927085074  IN   0x90f6c344e7d984f332c22266ef426e9727ca372c0.1 Ether0.000522348
0xb1c0f7d78082b7a51e2675bd12674be41a80d3a43ef946fc28b291504364bd42193 days 5 hrs ago0x5479a9ec6386db424b563ef059fc127042543a5d  IN   0x90f6c344e7d984f332c22266ef426e9727ca372c0.00666 Ether0.000058529
0xfaaaebed1079dbf6c34e298e283f77b0539d0a2f5d22251eb5d058079f1ed97c194 days 2 hrs ago0xaebbd80fd7dae979d965a3a5b09bbcd23eb40e5f  IN   0x90f6c344e7d984f332c22266ef426e9727ca372c0.1 Ether0.00004208
0xb42021dd2f3ae20690c11d0f00bf4d5bb1c80db37bc6ee2956c7f26baec5aaf4194 days 2 hrs ago0xaebbd80fd7dae979d965a3a5b09bbcd23eb40e5f  IN   0x90f6c344e7d984f332c22266ef426e9727ca372c0.1 Ether0.00004208
0x24303367d27b1a67aa12277f09dca0372159f6a0d57cbfee4e95d31a1affbf13194 days 2 hrs ago0xaebbd80fd7dae979d965a3a5b09bbcd23eb40e5f  IN    Contract Creation0 Ether0.001992802
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 Internal Transactions as a result of Contract Execution
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ParentTxHash Block Age From To Value
0x014cdefda74cc7b3b071937fca825e674093494fc0d79dd30bb19f480b510f5e4200804134 days 9 hrs ago0x90f6c344e7d984f332c22266ef426e9727ca372c0x5479a9ec6386db424b563ef059fc127042543a5d0.190809218301954076 Ether
0x014cdefda74cc7b3b071937fca825e674093494fc0d79dd30bb19f480b510f5e4200804134 days 9 hrs ago0x90f6c344e7d984f332c22266ef426e9727ca372c0xe0832c4f024d2427bbc6bd0c4931096d2ab5ccaf0 Ether
0x014cdefda74cc7b3b071937fca825e674093494fc0d79dd30bb19f480b510f5e4200804134 days 9 hrs ago0x90f6c344e7d984f332c22266ef426e9727ca372c0xe0832c4f024d2427bbc6bd0c4931096d2ab5ccaf0 Ether
0x014cdefda74cc7b3b071937fca825e674093494fc0d79dd30bb19f480b510f5e4200804134 days 9 hrs ago0xe0832c4f024d2427bbc6bd0c4931096d2ab5ccaf0x90f6c344e7d984f332c22266ef426e9727ca372c0 Ether
0x4a1a6f4a8106c33d27869e663b61ad2be74ae79d4f5b72dadaf7a263649c38f24200562134 days 10 hrs ago0x90f6c344e7d984f332c22266ef426e9727ca372c0xe0832c4f024d2427bbc6bd0c4931096d2ab5ccaf0 Ether
0x4a1a6f4a8106c33d27869e663b61ad2be74ae79d4f5b72dadaf7a263649c38f24200562134 days 10 hrs ago0x90f6c344e7d984f332c22266ef426e9727ca372c0xe0832c4f024d2427bbc6bd0c4931096d2ab5ccaf0 Ether
0x1c11aff35a8c6a2afd7f0b135bbb836879651c05732b243979d9d44570d484633948255173 days 6 hrs ago0x90f6c344e7d984f332c22266ef426e9727ca372c0xe0832c4f024d2427bbc6bd0c4931096d2ab5ccaf0 Ether
0x1c11aff35a8c6a2afd7f0b135bbb836879651c05732b243979d9d44570d484633948255173 days 6 hrs ago0x90f6c344e7d984f332c22266ef426e9727ca372c0xe0832c4f024d2427bbc6bd0c4931096d2ab5ccaf0 Ether
0xfcb65493edb89089b37e680953faa0626be42bd043280c6b8efe5f256f419de43870528185 days 4 hrs ago0x00559af7ef1b0a8d9e7a63adf3fc4e3931b74a3b0x90f6c344e7d984f332c22266ef426e9727ca372c0.04 Ether
0xfcb65493edb89089b37e680953faa0626be42bd043280c6b8efe5f256f419de43870528185 days 4 hrs ago0x90f6c344e7d984f332c22266ef426e9727ca372c0xe0832c4f024d2427bbc6bd0c4931096d2ab5ccaf0 Ether
0xfcb65493edb89089b37e680953faa0626be42bd043280c6b8efe5f256f419de43870528185 days 4 hrs ago0x00559af7ef1b0a8d9e7a63adf3fc4e3931b74a3b0x90f6c344e7d984f332c22266ef426e9727ca372c0 Ether
0x40005a1df3b2993db889921f3bc566d266f02b8bf593b6d7e78e4643db45025f3859737187 days 10 mins ago0x90f6c344e7d984f332c22266ef426e9727ca372c0x603506ea4a154b256bcba721c9681afaa2f3fe660.011508824401663876 Ether
0x40005a1df3b2993db889921f3bc566d266f02b8bf593b6d7e78e4643db45025f3859737187 days 10 mins ago0x90f6c344e7d984f332c22266ef426e9727ca372c0xe0832c4f024d2427bbc6bd0c4931096d2ab5ccaf0 Ether
0x40005a1df3b2993db889921f3bc566d266f02b8bf593b6d7e78e4643db45025f3859737187 days 10 mins ago0x90f6c344e7d984f332c22266ef426e9727ca372c0xe0832c4f024d2427bbc6bd0c4931096d2ab5ccaf0 Ether
0x40005a1df3b2993db889921f3bc566d266f02b8bf593b6d7e78e4643db45025f3859737187 days 10 mins ago0xe0832c4f024d2427bbc6bd0c4931096d2ab5ccaf0x90f6c344e7d984f332c22266ef426e9727ca372c0 Ether
0xfbf81911450aebfee5f33157fb5d8e2875994912c1d6002b3a7b0ed00bff22443824050192 days 7 hrs ago0x90f6c344e7d984f332c22266ef426e9727ca372c0x5479a9ec6386db424b563ef059fc127042543a5d0.000315876851866604 Ether
0xfbf81911450aebfee5f33157fb5d8e2875994912c1d6002b3a7b0ed00bff22443824050192 days 7 hrs ago0x90f6c344e7d984f332c22266ef426e9727ca372c0xe0832c4f024d2427bbc6bd0c4931096d2ab5ccaf0 Ether
0xfbf81911450aebfee5f33157fb5d8e2875994912c1d6002b3a7b0ed00bff22443824050192 days 7 hrs ago0x90f6c344e7d984f332c22266ef426e9727ca372c0xe0832c4f024d2427bbc6bd0c4931096d2ab5ccaf0 Ether
0xfbf81911450aebfee5f33157fb5d8e2875994912c1d6002b3a7b0ed00bff22443824050192 days 7 hrs ago0xe0832c4f024d2427bbc6bd0c4931096d2ab5ccaf0x90f6c344e7d984f332c22266ef426e9727ca372c0 Ether
0x95b13e1136fef3ef8c3d54702110f2714a2210ee1da78e662bf5c4c378ed02a43817761193 days 3 hrs ago0x90f6c344e7d984f332c22266ef426e9727ca372c0x5479a9ec6386db424b563ef059fc127042543a5d0.014002046944959533 Ether
0x95b13e1136fef3ef8c3d54702110f2714a2210ee1da78e662bf5c4c378ed02a43817761193 days 3 hrs ago0x90f6c344e7d984f332c22266ef426e9727ca372c0xe0832c4f024d2427bbc6bd0c4931096d2ab5ccaf0 Ether
0x95b13e1136fef3ef8c3d54702110f2714a2210ee1da78e662bf5c4c378ed02a43817761193 days 3 hrs ago0x90f6c344e7d984f332c22266ef426e9727ca372c0xe0832c4f024d2427bbc6bd0c4931096d2ab5ccaf0 Ether
0x95b13e1136fef3ef8c3d54702110f2714a2210ee1da78e662bf5c4c378ed02a43817761193 days 3 hrs ago0xe0832c4f024d2427bbc6bd0c4931096d2ab5ccaf0x90f6c344e7d984f332c22266ef426e9727ca372c0 Ether
0x19f4e83d78e4e5d7db54a0feedcb18a4702fbc87a4e27001f8ecafb50a3fa9ce3817143193 days 5 hrs ago0x00559af7ef1b0a8d9e7a63adf3fc4e3931b74a3b0x90f6c344e7d984f332c22266ef426e9727ca372c0.02 Ether
0x19f4e83d78e4e5d7db54a0feedcb18a4702fbc87a4e27001f8ecafb50a3fa9ce3817143193 days 5 hrs ago0x90f6c344e7d984f332c22266ef426e9727ca372c0xe0832c4f024d2427bbc6bd0c4931096d2ab5ccaf0 Ether
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Warning: The Compiled Contract might be susceptible to ExpExponentCleanup (medium/high-severity), EventStructWrongData (very low-severity) SolidityCompiler Bugs.

Contract Source Code Verified (Exact Match)
Contract Name: AutomatedExchange
Compiler Version: v0.4.24+commit.e67f0147
Optimization Enabled: No
Runs (Optimiser):  200



  Contract Source Code   Find Similiar Contracts

pragma solidity ^0.4.18; // solhint-disable-line



// ----------------------------------------------------------------------------
// ERC Token Standard #20 Interface
// https://github.com/ethereum/EIPs/blob/master/EIPS/eip-20.md
// ----------------------------------------------------------------------------
contract ERC20Interface {
    function totalSupply() public constant returns (uint);
    function balanceOf(address tokenOwner) public constant returns (uint balance);
    function allowance(address tokenOwner, address spender) public constant returns (uint remaining);
    function transfer(address to, uint tokens) public returns (bool success);
    function approve(address spender, uint tokens) public returns (bool success);
    function transferFrom(address from, address to, uint tokens) public returns (bool success);

    event Transfer(address indexed from, address indexed to, uint tokens);
    event Approval(address indexed tokenOwner, address indexed spender, uint tokens);
}

contract ApproveAndCallFallBack {
    function receiveApproval(address from, uint256 tokens, address token, bytes data) public;
}

contract AutomatedExchange is ApproveAndCallFallBack{

    uint256 PSN=100000000000000;
    uint256 PSNH=50000000000000;
    address creator;
    address vrfAddress=0xe0832c4f024D2427bBC6BD0C4931096d2ab5CCaF;//0x64F82571C326487cac31669F1e797EA0c9650879;
    ERC20Interface vrfcontract=ERC20Interface(vrfAddress);
    event BoughtToken(uint tokens,uint eth,address indexed to);
    event SoldToken(uint tokens,uint eth,address indexed to);
    function AutomatedExchange() public{
      creator=msg.sender;
    }
    function setAddress(address newaddr) public payable{
      require(msg.sender==creator);//only contract creator can set the address
      require(vrfAddress==0);//this can only be called once
      vrfAddress=newaddr;
    }
    //Tokens are sold by sending them to this contract with ApproveAndCall
    function receiveApproval(address from, uint256 tokens, address token, bytes data) public{
        //only allow this to be called from the token contract
        require(msg.sender==vrfAddress);
        uint256 tokenValue=calculateTokenSell(tokens);
        vrfcontract.transferFrom(from,this,tokens);
        from.transfer(tokenValue);
        emit SoldToken(tokens,tokenValue,from);
    }
    function buyTokens() public payable{
        uint256 tokensBought=calculateTokenBuy(msg.value,SafeMath.sub(this.balance,msg.value));
        vrfcontract.transfer(msg.sender,tokensBought);
        emit BoughtToken(tokensBought,msg.value,msg.sender);
    }
    //magic trade balancing algorithm
    function calculateTrade(uint256 rt,uint256 rs, uint256 bs) public view returns(uint256){
        //(PSN*bs)/(PSNH+((PSN*rs+PSNH*rt)/rt));
        return SafeMath.div(SafeMath.mul(PSN,bs),SafeMath.add(PSNH,SafeMath.div(SafeMath.add(SafeMath.mul(PSN,rs),SafeMath.mul(PSNH,rt)),rt)));
    }
    function calculateTokenSell(uint256 tokens) public view returns(uint256){
        return calculateTrade(tokens,vrfcontract.balanceOf(this),this.balance);
    }
    function calculateTokenBuy(uint256 eth,uint256 contractBalance) public view returns(uint256){
        return calculateTrade(eth,contractBalance,vrfcontract.balanceOf(this));
    }
    function calculateTokenBuySimple(uint256 eth) public view returns(uint256){
        return calculateTokenBuy(eth,this.balance);
    }

    //allow sending eth to the contract
    function () public payable {}

    function getBalance() public view returns(uint256){
        return this.balance;
    }
    function getTokenBalance() public view returns(uint256){
        return vrfcontract.balanceOf(this);
    }
    function min(uint256 a, uint256 b) private pure returns (uint256) {
        return a < b ? a : b;
    }
}

library SafeMath {

  /**
  * @dev Multiplies two numbers, throws on overflow.
  */
  function mul(uint256 a, uint256 b) internal pure returns (uint256) {
    if (a == 0) {
      return 0;
    }
    uint256 c = a * b;
    assert(c / a == b);
    return c;
  }

  /**
  * @dev Integer division of two numbers, truncating the quotient.
  */
  function div(uint256 a, uint256 b) internal pure returns (uint256) {
    // assert(b > 0); // Solidity automatically throws when dividing by 0
    uint256 c = a / b;
    // assert(a == b * c + a % b); // There is no case in which this doesn't hold
    return c;
  }

  /**
  * @dev Substracts two numbers, throws on overflow (i.e. if subtrahend is greater than minuend).
  */
  function sub(uint256 a, uint256 b) internal pure returns (uint256) {
    assert(b <= a);
    return a - b;
  }

  /**
  * @dev Adds two numbers, throws on overflow.
  */
  function add(uint256 a, uint256 b) internal pure returns (uint256) {
    uint256 c = a + b;
    assert(c >= a);
    return c;
  }
}

    Contract ABI  
[{"constant":true,"inputs":[],"name":"getBalance","outputs":[{"name":"","type":"uint256"}],"payable":false,"stateMutability":"view","type":"function"},{"constant":true,"inputs":[{"name":"rt","type":"uint256"},{"name":"rs","type":"uint256"},{"name":"bs","type":"uint256"}],"name":"calculateTrade","outputs":[{"name":"","type":"uint256"}],"payable":false,"stateMutability":"view","type":"function"},{"constant":true,"inputs":[],"name":"getTokenBalance","outputs":[{"name":"","type":"uint256"}],"payable":false,"stateMutability":"view","type":"function"},{"constant":true,"inputs":[{"name":"eth","type":"uint256"},{"name":"contractBalance","type":"uint256"}],"name":"calculateTokenBuy","outputs":[{"name":"","type":"uint256"}],"payable":false,"stateMutability":"view","type":"function"},{"constant":false,"inputs":[{"name":"from","type":"address"},{"name":"tokens","type":"uint256"},{"name":"token","type":"address"},{"name":"data","type":"bytes"}],"name":"receiveApproval","outputs":[],"payable":false,"stateMutability":"nonpayable","type":"function"},{"constant":true,"inputs":[{"name":"tokens","type":"uint256"}],"name":"calculateTokenSell","outputs":[{"name":"","type":"uint256"}],"payable":false,"stateMutability":"view","type":"function"},{"constant":false,"inputs":[],"name":"buyTokens","outputs":[],"payable":true,"stateMutability":"payable","type":"function"},{"constant":false,"inputs":[{"name":"newaddr","type":"address"}],"name":"setAddress","outputs":[],"payable":true,"stateMutability":"payable","type":"function"},{"constant":true,"inputs":[{"name":"eth","type":"uint256"}],"name":"calculateTokenBuySimple","outputs":[{"name":"","type":"uint256"}],"payable":false,"stateMutability":"view","type":"function"},{"inputs":[],"payable":false,"stateMutability":"nonpayable","type":"constructor"},{"payable":true,"stateMutability":"payable","type":"fallback"},{"anonymous":false,"inputs":[{"indexed":false,"name":"tokens","type":"uint256"},{"indexed":false,"name":"eth","type":"uint256"},{"indexed":true,"name":"to","type":"address"}],"name":"BoughtToken","type":"event"},{"anonymous":false,"inputs":[{"indexed":false,"name":"tokens","type":"uint256"},{"indexed":false,"name":"eth","type":"uint256"},{"indexed":true,"name":"to","type":"address"}],"name":"SoldToken","type":"event"}]

  Contract Creation Code Switch To Opcodes View
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   Swarm Source:
bzzr://da8282944b43b13fd1566b165623efed311b48b894ed7478e89986f6217c4812

 

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