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Contract Overview
Balance: 0 Ether
Ether Value: $0
Transactions: 22 txns
 Latest 22 txns

TxHash Age From To Value [TxFee]
0xa72388ae5e9aa09106f26edf9a6395ef4ded76a490be94590e5b49e42e8b2508114 days 15 hrs ago0x680e558d867e8e016237a1f9542c26c918d5042c  IN  0x21f961d83ae6a2fe8cf926d7f8af9107be8e968e0.0002 Ether0.0000252
0x14c6ed2bcc8a38f0357b0849bd2e303ea6a3f679cd53f8be11ae326ab38647f2116 days 5 hrs ago0x5554849edda39b0ba58232b7ae57925caa41f14c  IN  0x21f961d83ae6a2fe8cf926d7f8af9107be8e968e0.01 Ether0.000707805
0x52995605bb4a847a754a6602eab0496625ad14064514ed957e66c92edd18df54123 days 6 hrs ago0x42755e7796fd61f1f894fdf8e3afe0967b5b60e7  IN  0x21f961d83ae6a2fe8cf926d7f8af9107be8e968e0.005 Ether0.00013482
0xc589d66a3c428a3c7f2a25f3e21b24a117a1f435ff945b2f8e50da279f8fb844125 days 13 hrs ago0x26919e377a4e0b75edead8412a473ce838817fbb  IN  0x21f961d83ae6a2fe8cf926d7f8af9107be8e968e0.001 Ether0.000033705
0x8f4ebb060259570f808d6b23f4959aab906a5f3ccf9f6ba5f8406179f0e5d461126 days 5 hrs ago0x075ec3728910b78f7a7ef6b56da66657f41d7811  IN  0x21f961d83ae6a2fe8cf926d7f8af9107be8e968e0.001 Ether0.00013482
0xcdfc88101f9c1688d32c83748455edb9f60ff1e157155a1ed8cabeebda4ca8f0126 days 19 hrs ago0x11fb38b9828143cf9fd9f1393285a65eca487862  IN  0x21f961d83ae6a2fe8cf926d7f8af9107be8e968e0.001 Ether0.00013482
0xd7bee62a1171a9f140963ffa1c9fd863ebf54432047f92ed0afb72db0281120e127 days 17 hrs ago0xb2028881f9586f8b7fe8b7a7d0cf5fdc3aba053c  IN  0x21f961d83ae6a2fe8cf926d7f8af9107be8e968e0.01 Ether0.00013482
0x093d64e6870b402f0f617739b7a1b866ff994706cbc36c735ba3ec4cf7c606e8128 days 17 hrs ago0x9e327c6d054ccab946c95c3c6355dcb6b9791004  IN  0x21f961d83ae6a2fe8cf926d7f8af9107be8e968e0.001 Ether0.00013482
0xf64a525f678bb874400454a8c7ee4dee52ec391c806ba510ec9e54113db3f0ff128 days 17 hrs ago0xb1d5b0f8c3d0c59602533d8f8bf6eba24f315514  IN  0x21f961d83ae6a2fe8cf926d7f8af9107be8e968e0.001 Ether0.00013482
0x4f3b274933c935c64fa4ea72a1ff69ba44caaf17d0836ec9856d874f6e350da2132 days 4 hrs ago0x5a0b652052a8227b2daa9abe2714847fd0f709b6  IN  0x21f961d83ae6a2fe8cf926d7f8af9107be8e968e0.005 Ether0.00006741
0x42a86c946b28fdd25ad7e5a2e7d7dc3135332769ab1aab0e8a2427ce46a8f7b3132 days 4 hrs ago0xb89bfe33458c2b739e4e7eee87d29db3199cc33d  IN  0x21f961d83ae6a2fe8cf926d7f8af9107be8e968e0.0005 Ether0.00013482
0xba09fcd3b1db9e07f27faadcb7dc213828512674cba7a97b81f143346e84bbb6132 days 12 hrs ago0x4c581d7799c4dce78ecc7066d3ba7bb9b0e12861  IN  0x21f961d83ae6a2fe8cf926d7f8af9107be8e968e0.009669812 Ether0.00013482
0x53abaa2527237261fb5e77b2269c7c0e6e72a2cb5cc36885bd1b54b1ba222550132 days 14 hrs ago0xa631ec94edce1fe78cd7344a029b6c37c0df7dca  IN  0x21f961d83ae6a2fe8cf926d7f8af9107be8e968e0.001 Ether0.00013482
0x7a7c9aed589943f03941b5d80e67f2dc58cd73dbc1f34e87b8aa778b615bcd00132 days 17 hrs ago0x82055717366ec2dcf187a726b44ad35aca1973b7  IN  0x21f961d83ae6a2fe8cf926d7f8af9107be8e968e0.008 Ether0.00013482
0x6c1e64a243a89cf37d9edf46c85c2d5725267238d9f1207a170677289a2fb49f132 days 17 hrs ago0x4f7c6dd4550bcb2d39c6b266c73068b5d46c4704  IN  0x21f961d83ae6a2fe8cf926d7f8af9107be8e968e0 Ether0.000099948
0xaba0d23574f0b9f4082d34107ebea397487e66a30011fd9476d0d6d5a6a48f5e132 days 21 hrs ago0xd8d77b9208a6678eaecd03ac6f979584b4d4f51c  IN  0x21f961d83ae6a2fe8cf926d7f8af9107be8e968e0.001 Ether0.00013482
0xc5d612f47b2f69450c63657b654c20683bbbf498c9c52ab90ee054b8bd10570a132 days 23 hrs ago0xf4c0494ed1508f866fdd7f6c831c3c97394e164c  IN  0x21f961d83ae6a2fe8cf926d7f8af9107be8e968e0.005 Ether0.00013482
0x2df9488a08075e6464fca7ce0a51c300111ac705925eb0029887d28e3af1736e132 days 23 hrs ago0x2b186c4e8c918b4b517bb7a50083fc31ae02a85d  IN  0x21f961d83ae6a2fe8cf926d7f8af9107be8e968e0.001 Ether0.00026964
0x7fae6b3e792c027cde81e5b9fb71485e420d2508a294c6686845b6e2a47e496f132 days 23 hrs ago0xf4c0494ed1508f866fdd7f6c831c3c97394e164c  IN  0x21f961d83ae6a2fe8cf926d7f8af9107be8e968e0.01 Ether0.000101115
0xc40ab9985d711fe0e7c90b661b11cfc2b2a8bfd40e78569e0c512b8e3e476f8b132 days 23 hrs ago0xaff82c013a7bccc318f469cff7942e4010293770  IN  0x21f961d83ae6a2fe8cf926d7f8af9107be8e968e0.001 Ether0.00013482
0x1953a608145c4c904d2822b052a474f70071cc95b6730567c153f3c980e0a1ef132 days 23 hrs ago0x695b9d43733b776ea2820650ffb246082e378af4  IN  0x21f961d83ae6a2fe8cf926d7f8af9107be8e968e0 Ether0.000024987
0x2ae1161f266f34cd13f336d0eb88ad026966da334673c99756bb4ec7fb2a999c132 days 23 hrs ago0x90c8a611eaede9bc6ebe64834d75e117380d7094  IN  0x21f961d83ae6a2fe8cf926d7f8af9107be8e968e0.001 Ether0.00013482
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 Internal Transactions as a result of Contract Execution
 Latest 20 Internal Transactions

ParentTxHash Block Age From To Value
0x14c6ed2bcc8a38f0357b0849bd2e303ea6a3f679cd53f8be11ae326ab38647f25339531116 days 5 hrs ago0x21f961d83ae6a2fe8cf926d7f8af9107be8e968e0x131a99859a8bfa3251d899f0675607766736ffae0.01 Ether
0x52995605bb4a847a754a6602eab0496625ad14064514ed957e66c92edd18df545297469123 days 6 hrs ago0x21f961d83ae6a2fe8cf926d7f8af9107be8e968e0x131a99859a8bfa3251d899f0675607766736ffae0.005 Ether
0xc589d66a3c428a3c7f2a25f3e21b24a117a1f435ff945b2f8e50da279f8fb8445283649125 days 13 hrs ago0x21f961d83ae6a2fe8cf926d7f8af9107be8e968e0x131a99859a8bfa3251d899f0675607766736ffae0.001 Ether
0x8f4ebb060259570f808d6b23f4959aab906a5f3ccf9f6ba5f8406179f0e5d4615279697126 days 5 hrs ago0x21f961d83ae6a2fe8cf926d7f8af9107be8e968e0x131a99859a8bfa3251d899f0675607766736ffae0.001 Ether
0xcdfc88101f9c1688d32c83748455edb9f60ff1e157155a1ed8cabeebda4ca8f05276352126 days 19 hrs ago0x21f961d83ae6a2fe8cf926d7f8af9107be8e968e0x131a99859a8bfa3251d899f0675607766736ffae0.001 Ether
0xd7bee62a1171a9f140963ffa1c9fd863ebf54432047f92ed0afb72db0281120e5270893127 days 17 hrs ago0x21f961d83ae6a2fe8cf926d7f8af9107be8e968e0x131a99859a8bfa3251d899f0675607766736ffae0.01 Ether
0x093d64e6870b402f0f617739b7a1b866ff994706cbc36c735ba3ec4cf7c606e85265057128 days 17 hrs ago0x21f961d83ae6a2fe8cf926d7f8af9107be8e968e0x131a99859a8bfa3251d899f0675607766736ffae0.001 Ether
0xf64a525f678bb874400454a8c7ee4dee52ec391c806ba510ec9e54113db3f0ff5264971128 days 17 hrs ago0x21f961d83ae6a2fe8cf926d7f8af9107be8e968e0x131a99859a8bfa3251d899f0675607766736ffae0.001 Ether
0x4f3b274933c935c64fa4ea72a1ff69ba44caaf17d0836ec9856d874f6e350da25244635132 days 4 hrs ago0x21f961d83ae6a2fe8cf926d7f8af9107be8e968e0x131a99859a8bfa3251d899f0675607766736ffae0.005 Ether
0x42a86c946b28fdd25ad7e5a2e7d7dc3135332769ab1aab0e8a2427ce46a8f7b35244580132 days 4 hrs ago0x21f961d83ae6a2fe8cf926d7f8af9107be8e968e0x131a99859a8bfa3251d899f0675607766736ffae0.0005 Ether
0xba09fcd3b1db9e07f27faadcb7dc213828512674cba7a97b81f143346e84bbb65242674132 days 12 hrs ago0x21f961d83ae6a2fe8cf926d7f8af9107be8e968e0x131a99859a8bfa3251d899f0675607766736ffae0.009669812 Ether
0x53abaa2527237261fb5e77b2269c7c0e6e72a2cb5cc36885bd1b54b1ba2225505242322132 days 14 hrs ago0x21f961d83ae6a2fe8cf926d7f8af9107be8e968e0x131a99859a8bfa3251d899f0675607766736ffae0.001 Ether
0x7a7c9aed589943f03941b5d80e67f2dc58cd73dbc1f34e87b8aa778b615bcd005241501132 days 17 hrs ago0x21f961d83ae6a2fe8cf926d7f8af9107be8e968e0x131a99859a8bfa3251d899f0675607766736ffae0.008 Ether
0xaba0d23574f0b9f4082d34107ebea397487e66a30011fd9476d0d6d5a6a48f5e5240583132 days 21 hrs ago0x21f961d83ae6a2fe8cf926d7f8af9107be8e968e0x131a99859a8bfa3251d899f0675607766736ffae0.001 Ether
0xc5d612f47b2f69450c63657b654c20683bbbf498c9c52ab90ee054b8bd10570a5240092132 days 23 hrs ago0x21f961d83ae6a2fe8cf926d7f8af9107be8e968e0x131a99859a8bfa3251d899f0675607766736ffae0.005 Ether
0x2df9488a08075e6464fca7ce0a51c300111ac705925eb0029887d28e3af1736e5240092132 days 23 hrs ago0x21f961d83ae6a2fe8cf926d7f8af9107be8e968e0x131a99859a8bfa3251d899f0675607766736ffae0.001 Ether
0x7fae6b3e792c027cde81e5b9fb71485e420d2508a294c6686845b6e2a47e496f5240086132 days 23 hrs ago0x21f961d83ae6a2fe8cf926d7f8af9107be8e968e0x131a99859a8bfa3251d899f0675607766736ffae0.01 Ether
0xc40ab9985d711fe0e7c90b661b11cfc2b2a8bfd40e78569e0c512b8e3e476f8b5240051132 days 23 hrs ago0x21f961d83ae6a2fe8cf926d7f8af9107be8e968e0x131a99859a8bfa3251d899f0675607766736ffae0.001 Ether
0x2ae1161f266f34cd13f336d0eb88ad026966da334673c99756bb4ec7fb2a999c5240023132 days 23 hrs ago0x21f961d83ae6a2fe8cf926d7f8af9107be8e968e0x131a99859a8bfa3251d899f0675607766736ffae0.001 Ether
0xa9038041b4508181ecb551b85c241f55f04e8f343d5275282d8dffcfbbf1cef15226785135 days 5 hrs ago0x131a99859a8bfa3251d899f0675607766736ffae  Contract Creation0 Ether
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Warning: The compiled contract might be susceptible to ZeroFunctionSelector (very low-severity) Solidity compiler bugs.

Contract Source Code Verified (Similar match)
Note: Displaying similar matching verified source code at contract 0xe236aebe408c6363deadff4db15938708fe07d3f(excluding Constructor Arguments if any)
Contract Name: Forwarder
Compiler Version: v0.4.16-nightly.2017.8.11+commit.c84de7fa
Optimization Enabled: Yes
Runs (Optimiser):  200



  Contract Source Code   Find Similiar Contracts

pragma solidity ^0.4.14;

/**
 * Contract that exposes the needed erc20 token functions
 */

contract ERC20Interface {
  // Send _value amount of tokens to address _to
  function transfer(address _to, uint256 _value) returns (bool success);
  // Get the account balance of another account with address _owner
  function balanceOf(address _owner) constant returns (uint256 balance);
}

/**
 * Contract that will forward any incoming Ether to its creator
 */
contract Forwarder {
  // Address to which any funds sent to this contract will be forwarded
  address public parentAddress;
  event ForwarderDeposited(address from, uint value, bytes data);

  event TokensFlushed(
    address tokenContractAddress, // The contract address of the token
    uint value // Amount of token sent
  );

  /**
   * Create the contract, and set the destination address to that of the creator
   */
  function Forwarder() {
    parentAddress = msg.sender;
  }

  /**
   * Modifier that will execute internal code block only if the sender is a parent of the forwarder contract
   */
  modifier onlyParent {
    if (msg.sender != parentAddress) {
      throw;
    }
    _;
  }

  /**
   * Default function; Gets called when Ether is deposited, and forwards it to the destination address
   */
  function() payable {
    if (!parentAddress.call.value(msg.value)(msg.data))
      throw;
    // Fire off the deposited event if we can forward it  
    ForwarderDeposited(msg.sender, msg.value, msg.data);
  }

  /**
   * Execute a token transfer of the full balance from the forwarder token to the main wallet contract
   * @param tokenContractAddress the address of the erc20 token contract
   */
  function flushTokens(address tokenContractAddress) onlyParent {
    ERC20Interface instance = ERC20Interface(tokenContractAddress);
    var forwarderAddress = address(this);
    var forwarderBalance = instance.balanceOf(forwarderAddress);
    if (forwarderBalance == 0) {
      return;
    }
    if (!instance.transfer(parentAddress, forwarderBalance)) {
      throw;
    }
    TokensFlushed(tokenContractAddress, forwarderBalance);
  }

  /**
   * It is possible that funds were sent to this address before the contract was deployed.
   * We can flush those funds to the destination address.
   */
  function flush() {
    if (!parentAddress.call.value(this.balance)())
      throw;
  }
}

/**
 * Basic multi-signer wallet designed for use in a co-signing environment where 2 signatures are required to move funds.
 * Typically used in a 2-of-3 signing configuration. Uses ecrecover to allow for 2 signatures in a single transaction.
 */
contract WalletSimple {
  // Events
  event Deposited(address from, uint value, bytes data);
  event SafeModeActivated(address msgSender);
  event Transacted(
    address msgSender, // Address of the sender of the message initiating the transaction
    address otherSigner, // Address of the signer (second signature) used to initiate the transaction
    bytes32 operation, // Operation hash (sha3 of toAddress, value, data, expireTime, sequenceId)
    address toAddress, // The address the transaction was sent to
    uint value, // Amount of Wei sent to the address
    bytes data // Data sent when invoking the transaction
  );
  event TokenTransacted(
    address msgSender, // Address of the sender of the message initiating the transaction
    address otherSigner, // Address of the signer (second signature) used to initiate the transaction
    bytes32 operation, // Operation hash (sha3 of toAddress, value, tokenContractAddress, expireTime, sequenceId)
    address toAddress, // The address the transaction was sent to
    uint value, // Amount of token sent
    address tokenContractAddress // The contract address of the token
  );

  // Public fields
  address[] public signers; // The addresses that can co-sign transactions on the wallet
  bool public safeMode = false; // When active, wallet may only send to signer addresses

  // Internal fields
  uint constant SEQUENCE_ID_WINDOW_SIZE = 10;
  uint[10] recentSequenceIds;

  /**
   * Modifier that will execute internal code block only if the sender is an authorized signer on this wallet
   */
  modifier onlysigner {
    if (!isSigner(msg.sender)) {
      throw;
    }
    _;
  }

  /**
   * Set up a simple multi-sig wallet by specifying the signers allowed to be used on this wallet.
   * 2 signers will be required to send a transaction from this wallet.
   * Note: The sender is NOT automatically added to the list of signers.
   * Signers CANNOT be changed once they are set
   *
   * @param allowedSigners An array of signers on the wallet
   */
  function WalletSimple(address[] allowedSigners) {
    if (allowedSigners.length != 3) {
      // Invalid number of signers
      throw;
    }
    signers = allowedSigners;
  }

  /**
   * Gets called when a transaction is received without calling a method
   */
  function() payable {
    if (msg.value > 0) {
      // Fire deposited event if we are receiving funds
      Deposited(msg.sender, msg.value, msg.data);
    }
  }

  /**
   * Create a new contract (and also address) that forwards funds to this contract
   * returns address of newly created forwarder address
   */
  function createForwarder() onlysigner returns (address) {
    return new Forwarder();
  }

  /**
   * Execute a multi-signature transaction from this wallet using 2 signers: one from msg.sender and the other from ecrecover.
   * The signature is a signed form (using eth.sign) of tightly packed toAddress, value, data, expireTime and sequenceId
   * Sequence IDs are numbers starting from 1. They are used to prevent replay attacks and may not be repeated.
   *
   * @param toAddress the destination address to send an outgoing transaction
   * @param value the amount in Wei to be sent
   * @param data the data to send to the toAddress when invoking the transaction
   * @param expireTime the number of seconds since 1970 for which this transaction is valid
   * @param sequenceId the unique sequence id obtainable from getNextSequenceId
   * @param signature the result of eth.sign on the operationHash sha3(toAddress, value, data, expireTime, sequenceId)
   */
  function sendMultiSig(address toAddress, uint value, bytes data, uint expireTime, uint sequenceId, bytes signature) onlysigner {
    // Verify the other signer
    var operationHash = sha3("ETHER", toAddress, value, data, expireTime, sequenceId);
    
    var otherSigner = verifyMultiSig(toAddress, operationHash, signature, expireTime, sequenceId);

    // Success, send the transaction
    if (!(toAddress.call.value(value)(data))) {
      // Failed executing transaction
      throw;
    }
    Transacted(msg.sender, otherSigner, operationHash, toAddress, value, data);
  }
  
  /**
   * Execute a multi-signature token transfer from this wallet using 2 signers: one from msg.sender and the other from ecrecover.
   * The signature is a signed form (using eth.sign) of tightly packed toAddress, value, tokenContractAddress, expireTime and sequenceId
   * Sequence IDs are numbers starting from 1. They are used to prevent replay attacks and may not be repeated.
   *
   * @param toAddress the destination address to send an outgoing transaction
   * @param value the amount in tokens to be sent
   * @param tokenContractAddress the address of the erc20 token contract
   * @param expireTime the number of seconds since 1970 for which this transaction is valid
   * @param sequenceId the unique sequence id obtainable from getNextSequenceId
   * @param signature the result of eth.sign on the operationHash sha3(toAddress, value, tokenContractAddress, expireTime, sequenceId)
   */
  function sendMultiSigToken(address toAddress, uint value, address tokenContractAddress, uint expireTime, uint sequenceId, bytes signature) onlysigner {
    // Verify the other signer
    var operationHash = sha3("ERC20", toAddress, value, tokenContractAddress, expireTime, sequenceId);
    
    var otherSigner = verifyMultiSig(toAddress, operationHash, signature, expireTime, sequenceId);
    
    ERC20Interface instance = ERC20Interface(tokenContractAddress);
    if (!instance.transfer(toAddress, value)) {
        throw;
    }
    TokenTransacted(msg.sender, otherSigner, operationHash, toAddress, value, tokenContractAddress);
  }

  /**
   * Execute a token flush from one of the forwarder addresses. This transfer needs only a single signature and can be done by any signer
   *
   * @param forwarderAddress the address of the forwarder address to flush the tokens from
   * @param tokenContractAddress the address of the erc20 token contract
   */
  function flushForwarderTokens(address forwarderAddress, address tokenContractAddress) onlysigner {    
    Forwarder forwarder = Forwarder(forwarderAddress);
    forwarder.flushTokens(tokenContractAddress);
  }  
  
  /**
   * Do common multisig verification for both eth sends and erc20token transfers
   *
   * @param toAddress the destination address to send an outgoing transaction
   * @param operationHash the sha3 of the toAddress, value, data/tokenContractAddress and expireTime
   * @param signature the tightly packed signature of r, s, and v as an array of 65 bytes (returned by eth.sign)
   * @param expireTime the number of seconds since 1970 for which this transaction is valid
   * @param sequenceId the unique sequence id obtainable from getNextSequenceId
   * returns address of the address to send tokens or eth to
   */
  function verifyMultiSig(address toAddress, bytes32 operationHash, bytes signature, uint expireTime, uint sequenceId) private returns (address) {

    var otherSigner = recoverAddressFromSignature(operationHash, signature);

    // Verify if we are in safe mode. In safe mode, the wallet can only send to signers
    if (safeMode && !isSigner(toAddress)) {
      // We are in safe mode and the toAddress is not a signer. Disallow!
      throw;
    }
    // Verify that the transaction has not expired
    if (expireTime < block.timestamp) {
      // Transaction expired
      throw;
    }

    // Try to insert the sequence ID. Will throw if the sequence id was invalid
    tryInsertSequenceId(sequenceId);

    if (!isSigner(otherSigner)) {
      // Other signer not on this wallet or operation does not match arguments
      throw;
    }
    if (otherSigner == msg.sender) {
      // Cannot approve own transaction
      throw;
    }

    return otherSigner;
  }

  /**
   * Irrevocably puts contract into safe mode. When in this mode, transactions may only be sent to signing addresses.
   */
  function activateSafeMode() onlysigner {
    safeMode = true;
    SafeModeActivated(msg.sender);
  }

  /**
   * Determine if an address is a signer on this wallet
   * @param signer address to check
   * returns boolean indicating whether address is signer or not
   */
  function isSigner(address signer) returns (bool) {
    // Iterate through all signers on the wallet and
    for (uint i = 0; i < signers.length; i++) {
      if (signers[i] == signer) {
        return true;
      }
    }
    return false;
  }

  /**
   * Gets the second signer's address using ecrecover
   * @param operationHash the sha3 of the toAddress, value, data/tokenContractAddress and expireTime
   * @param signature the tightly packed signature of r, s, and v as an array of 65 bytes (returned by eth.sign)
   * returns address recovered from the signature
   */
  function recoverAddressFromSignature(bytes32 operationHash, bytes signature) private returns (address) {
    if (signature.length != 65) {
      throw;
    }
    // We need to unpack the signature, which is given as an array of 65 bytes (from eth.sign)
    bytes32 r;
    bytes32 s;
    uint8 v;
    assembly {
      r := mload(add(signature, 32))
      s := mload(add(signature, 64))
      v := and(mload(add(signature, 65)), 255)
    }
    if (v < 27) {
      v += 27; // Ethereum versions are 27 or 28 as opposed to 0 or 1 which is submitted by some signing libs
    }
    return ecrecover(operationHash, v, r, s);
  }

  /**
   * Verify that the sequence id has not been used before and inserts it. Throws if the sequence ID was not accepted.
   * We collect a window of up to 10 recent sequence ids, and allow any sequence id that is not in the window and
   * greater than the minimum element in the window.
   * @param sequenceId to insert into array of stored ids
   */
  function tryInsertSequenceId(uint sequenceId) onlysigner private {
    // Keep a pointer to the lowest value element in the window
    uint lowestValueIndex = 0;
    for (uint i = 0; i < SEQUENCE_ID_WINDOW_SIZE; i++) {
      if (recentSequenceIds[i] == sequenceId) {
        // This sequence ID has been used before. Disallow!
        throw;
      }
      if (recentSequenceIds[i] < recentSequenceIds[lowestValueIndex]) {
        lowestValueIndex = i;
      }
    }
    if (sequenceId < recentSequenceIds[lowestValueIndex]) {
      // The sequence ID being used is lower than the lowest value in the window
      // so we cannot accept it as it may have been used before
      throw;
    }
    if (sequenceId > (recentSequenceIds[lowestValueIndex] + 10000)) {
      // Block sequence IDs which are much higher than the lowest value
      // This prevents people blocking the contract by using very large sequence IDs quickly
      throw;
    }
    recentSequenceIds[lowestValueIndex] = sequenceId;
  }

  /**
   * Gets the next available sequence ID for signing when using executeAndConfirm
   * returns the sequenceId one higher than the highest currently stored
   */
  function getNextSequenceId() returns (uint) {
    uint highestSequenceId = 0;
    for (uint i = 0; i < SEQUENCE_ID_WINDOW_SIZE; i++) {
      if (recentSequenceIds[i] > highestSequenceId) {
        highestSequenceId = recentSequenceIds[i];
      }
    }
    return highestSequenceId + 1;
  }
}

    Contract ABI  
[{"constant":true,"inputs":[],"name":"parentAddress","outputs":[{"name":"","type":"address"}],"payable":false,"type":"function"},{"constant":false,"inputs":[{"name":"tokenContractAddress","type":"address"}],"name":"flushTokens","outputs":[],"payable":false,"type":"function"},{"constant":false,"inputs":[],"name":"flush","outputs":[],"payable":false,"type":"function"},{"inputs":[],"payable":false,"type":"constructor"},{"payable":true,"type":"fallback"},{"anonymous":false,"inputs":[{"indexed":false,"name":"from","type":"address"},{"indexed":false,"name":"value","type":"uint256"},{"indexed":false,"name":"data","type":"bytes"}],"name":"ForwarderDeposited","type":"event"},{"anonymous":false,"inputs":[{"indexed":false,"name":"tokenContractAddress","type":"address"},{"indexed":false,"name":"value","type":"uint256"}],"name":"TokensFlushed","type":"event"}]

  Contract Creation Code Switch To Opcodes View
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

   Swarm Source:
bzzr://d0f8838ba17108a895d34ae8ef3bff4e0dc9d639c3c51921fee1d17eaa803721

 

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