ETH Price: $2,781.19 (+4.06%)

Contract

0xAEa8e1b6CB5c05D1dAc618551C76bcD578EA3524
 

Overview

ETH Balance

8.696525286588796041 ETH

Eth Value

$24,186.69 (@ $2,781.19/ETH)

Token Holdings

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Private Name Tags

TokenTracker

Multichain Info

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Transaction Hash
Method
Block
From
To
Transfer194728852024-03-20 2:16:59339 days ago1710901019IN
Sogur: SGR Token
0.005 ETH0.0006101629.05532737
Transfer194728762024-03-20 2:15:11339 days ago1710900911IN
Sogur: SGR Token
0.00760358 ETH0.0006036428.74483041
Transfer179497162023-08-19 15:29:11553 days ago1692458951IN
Sogur: SGR Token
0 ETH0.0011077116.7677863
Transfer155021952022-09-09 10:16:41897 days ago1662718601IN
Sogur: SGR Token
0 ETH0.0005600512.65860605
Transfer153113612022-08-10 1:06:30927 days ago1660093590IN
Sogur: SGR Token
0 ETH0.0006940814.74673918
Transfer137574812021-12-07 8:16:191173 days ago1638864979IN
Sogur: SGR Token
0 ETH0.0055776286.92359165
Approve132797762021-09-23 4:13:381248 days ago1632370418IN
Sogur: SGR Token
0 ETH0.0016087367
Transfer129707592021-08-06 10:00:451296 days ago1628244045IN
Sogur: SGR Token
0 ETH0.0018490628
Transfer126274712021-06-13 17:23:211349 days ago1623605001IN
Sogur: SGR Token
0 ETH0.000390957
Transfer126114192021-06-11 5:36:261352 days ago1623389786IN
Sogur: SGR Token
0 ETH0.000726213
Transfer125376412021-05-30 19:43:071363 days ago1622403787IN
Sogur: SGR Token
0 ETH0.0015186326
Transfer125274082021-05-29 5:36:451365 days ago1622266605IN
Sogur: SGR Token
0 ETH0.0027760651.42857142
Transfer124167452021-05-12 1:51:271382 days ago1620784287IN
Sogur: SGR Token
0 ETH0.00893984160
Transfer123789822021-05-06 5:44:571388 days ago1620279897IN
Sogur: SGR Token
0 ETH0.0019547535
Transfer123034502021-04-24 14:20:411400 days ago1619274041IN
Sogur: SGR Token
0 ETH0.0029054452
Transfer122604162021-04-17 22:54:051406 days ago1618700045IN
Sogur: SGR Token
0 ETH0.004868990.2
Transfer121101022021-03-25 19:49:571429 days ago1616701797IN
Sogur: SGR Token
0 ETH0.00759565121
Transfer120972292021-03-23 20:18:341431 days ago1616530714IN
Sogur: SGR Token
0 ETH0.01007957160.6
Transfer120755132021-03-20 11:50:251435 days ago1616241025IN
Sogur: SGR Token
0 ETH0.00384571110
Transfer120151122021-03-11 4:22:581444 days ago1615436578IN
Sogur: SGR Token
0 ETH0.0035675275
Approve119871882021-03-06 20:57:251448 days ago1615064245IN
Sogur: SGR Token
0 ETH0.00382423153
Approve119871882021-03-06 20:57:251448 days ago1615064245IN
Sogur: SGR Token
0 ETH0.00636408144
Transfer119584382021-03-02 11:02:101453 days ago1614682930IN
Sogur: SGR Token
0 ETH0.00476976
Transfer119419682021-02-27 22:12:011455 days ago1614463921IN
Sogur: SGR Token
0 ETH0.0050219280
Transfer119417942021-02-27 21:32:271455 days ago1614461547IN
Sogur: SGR Token
0 ETH0.0055241188
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Latest 25 internal transactions (View All)

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179497162023-08-19 15:29:11553 days ago1692458951
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0 ETH
179497162023-08-19 15:29:11553 days ago1692458951
0xAEa8e1b6...578EA3524
0.00579248 ETH
179497162023-08-19 15:29:11553 days ago1692458951
0xAEa8e1b6...578EA3524
0 ETH
179497162023-08-19 15:29:11553 days ago1692458951
0xAEa8e1b6...578EA3524
0 ETH
179497162023-08-19 15:29:11553 days ago1692458951
0xAEa8e1b6...578EA3524
0 ETH
179497162023-08-19 15:29:11553 days ago1692458951
0xAEa8e1b6...578EA3524
0 ETH
179497162023-08-19 15:29:11553 days ago1692458951
0xAEa8e1b6...578EA3524
0 ETH
155021952022-09-09 10:16:41897 days ago1662718601
0xAEa8e1b6...578EA3524
0 ETH
155021952022-09-09 10:16:41897 days ago1662718601
0xAEa8e1b6...578EA3524
0 ETH
155021952022-09-09 10:16:41897 days ago1662718601
0xAEa8e1b6...578EA3524
0 ETH
153113612022-08-10 1:06:30927 days ago1660093590
0xAEa8e1b6...578EA3524
0 ETH
153113612022-08-10 1:06:30927 days ago1660093590
0xAEa8e1b6...578EA3524
0 ETH
153113612022-08-10 1:06:30927 days ago1660093590
0xAEa8e1b6...578EA3524
0 ETH
137574812021-12-07 8:16:191173 days ago1638864979
0xAEa8e1b6...578EA3524
0 ETH
137574812021-12-07 8:16:191173 days ago1638864979
0xAEa8e1b6...578EA3524
0 ETH
137574812021-12-07 8:16:191173 days ago1638864979
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0 ETH
129707592021-08-06 10:00:451296 days ago1628244045
0xAEa8e1b6...578EA3524
0 ETH
129707592021-08-06 10:00:451296 days ago1628244045
0xAEa8e1b6...578EA3524
0.00780706 ETH
129707592021-08-06 10:00:451296 days ago1628244045
0xAEa8e1b6...578EA3524
0 ETH
129707592021-08-06 10:00:451296 days ago1628244045
0xAEa8e1b6...578EA3524
0 ETH
129707592021-08-06 10:00:451296 days ago1628244045
0xAEa8e1b6...578EA3524
0 ETH
129707592021-08-06 10:00:451296 days ago1628244045
0xAEa8e1b6...578EA3524
0 ETH
129707592021-08-06 10:00:451296 days ago1628244045
0xAEa8e1b6...578EA3524
0 ETH
126274712021-06-13 17:23:211349 days ago1623605001
0xAEa8e1b6...578EA3524
0 ETH
126274712021-06-13 17:23:211349 days ago1623605001
0xAEa8e1b6...578EA3524
0.02882233 ETH
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Contract Source Code Verified (Exact Match)

Contract Name:
SGRToken

Compiler Version
v0.4.25+commit.59dbf8f1

Optimization Enabled:
Yes with 6000 runs

Other Settings:
default evmVersion, GNU GPLv3 license

Contract Source Code (Solidity)

/**
 *Submitted for verification at Etherscan.io on 2020-08-25
*/

pragma solidity 0.4.25;

// File: contracts/sogur/interfaces/IPaymentHandler.sol

/**
 * @title Payment Handler Interface.
 */
interface IPaymentHandler {
    /**
     * @dev Get the amount of available ETH.
     * @return The amount of available ETH.
     */
    function getEthBalance() external view returns (uint256);

    /**
     * @dev Transfer ETH to an SGR holder.
     * @param _to The address of the SGR holder.
     * @param _value The amount of ETH to transfer.
     */
    function transferEthToSgrHolder(address _to, uint256 _value) external;
}

// File: contracts/sogur/interfaces/IMintListener.sol

/**
 * @title Mint Listener Interface.
 */
interface IMintListener {
    /**
     * @dev Mint SGR for SGN holders.
     * @param _value The amount of SGR to mint.
     */
    function mintSgrForSgnHolders(uint256 _value) external;
}

// File: contracts/sogur/interfaces/ISGRTokenManager.sol

/**
 * @title SGR Token Manager Interface.
 */
interface ISGRTokenManager {
    /**
     * @dev Exchange ETH for SGR.
     * @param _sender The address of the sender.
     * @param _ethAmount The amount of ETH received.
     * @return The amount of SGR that the sender is entitled to.
     */
    function exchangeEthForSgr(address _sender, uint256 _ethAmount) external returns (uint256);

    /**
     * @dev Handle after the ETH for SGR exchange operation.
     * @param _sender The address of the sender.
     * @param _ethAmount The amount of ETH received.
     * @param _sgrAmount The amount of SGR given.
     */
    function afterExchangeEthForSgr(address _sender, uint256 _ethAmount, uint256 _sgrAmount) external;

    /**
     * @dev Exchange SGR for ETH.
     * @param _sender The address of the sender.
     * @param _sgrAmount The amount of SGR received.
     * @return The amount of ETH that the sender is entitled to.
     */
    function exchangeSgrForEth(address _sender, uint256 _sgrAmount) external returns (uint256);

    /**
     * @dev Handle after the SGR for ETH exchange operation.
     * @param _sender The address of the sender.
     * @param _sgrAmount The amount of SGR received.
     * @param _ethAmount The amount of ETH given.
     * @return The is success result.
     */
    function afterExchangeSgrForEth(address _sender, uint256 _sgrAmount, uint256 _ethAmount) external returns (bool);

    /**
     * @dev Handle direct SGR transfer.
     * @param _sender The address of the sender.
     * @param _to The address of the destination account.
     * @param _value The amount of SGR to be transferred.
     */
    function uponTransfer(address _sender, address _to, uint256 _value) external;


    /**
     * @dev Handle after direct SGR transfer operation.
     * @param _sender The address of the sender.
     * @param _to The address of the destination account.
     * @param _value The SGR transferred amount.
     * @param _transferResult The transfer result.
     * @return is success result.
     */
    function afterTransfer(address _sender, address _to, uint256 _value, bool _transferResult) external returns (bool);

    /**
     * @dev Handle custodian SGR transfer.
     * @param _sender The address of the sender.
     * @param _from The address of the source account.
     * @param _to The address of the destination account.
     * @param _value The amount of SGR to be transferred.
     */
    function uponTransferFrom(address _sender, address _from, address _to, uint256 _value) external;

    /**
     * @dev Handle after custodian SGR transfer operation.
     * @param _sender The address of the sender.
     * @param _from The address of the source account.
     * @param _to The address of the destination account.
     * @param _value The SGR transferred amount.
     * @param _transferFromResult The transferFrom result.
     * @return is success result.
     */
    function afterTransferFrom(address _sender, address _from, address _to, uint256 _value, bool _transferFromResult) external returns (bool);

    /**
     * @dev Handle the operation of ETH deposit into the SGRToken contract.
     * @param _sender The address of the account which has issued the operation.
     * @param _balance The amount of ETH in the SGRToken contract.
     * @param _amount The deposited ETH amount.
     * @return The address of the reserve-wallet and the deficient amount of ETH in the SGRToken contract.
     */
    function uponDeposit(address _sender, uint256 _balance, uint256 _amount) external returns (address, uint256);

    /**
     * @dev Handle the operation of ETH withdrawal from the SGRToken contract.
     * @param _sender The address of the account which has issued the operation.
     * @param _balance The amount of ETH in the SGRToken contract prior the withdrawal.
     * @return The address of the reserve-wallet and the excessive amount of ETH in the SGRToken contract.
     */
    function uponWithdraw(address _sender, uint256 _balance) external returns (address, uint256);

    /**
     * @dev Handle after ETH withdrawal from the SGRToken contract operation.
     * @param _sender The address of the account which has issued the operation.
     * @param _wallet The address of the withdrawal wallet.
     * @param _amount The ETH withdraw amount.
     * @param _priorWithdrawEthBalance The amount of ETH in the SGRToken contract prior the withdrawal.
     * @param _afterWithdrawEthBalance The amount of ETH in the SGRToken contract after the withdrawal.
     */
    function afterWithdraw(address _sender, address _wallet, uint256 _amount, uint256 _priorWithdrawEthBalance, uint256 _afterWithdrawEthBalance) external;

    /** 
     * @dev Upon SGR mint for SGN holders.
     * @param _value The amount of SGR to mint.
     */
    function uponMintSgrForSgnHolders(uint256 _value) external;

    /**
     * @dev Handle after SGR mint for SGN holders.
     * @param _value The minted amount of SGR.
     */
    function afterMintSgrForSgnHolders(uint256 _value) external;

    /**
     * @dev Upon SGR transfer to an SGN holder.
     * @param _to The address of the SGN holder.
     * @param _value The amount of SGR to transfer.
     */
    function uponTransferSgrToSgnHolder(address _to, uint256 _value) external;

    /**
     * @dev Handle after SGR transfer to an SGN holder.
     * @param _to The address of the SGN holder.
     * @param _value The transferred amount of SGR.
     */
    function afterTransferSgrToSgnHolder(address _to, uint256 _value) external;

    /**
     * @dev Upon ETH transfer to an SGR holder.
     * @param _to The address of the SGR holder.
     * @param _value The amount of ETH to transfer.
     * @param _status The operation's completion-status.
     */
    function postTransferEthToSgrHolder(address _to, uint256 _value, bool _status) external;

    /**
     * @dev Get the address of the reserve-wallet and the deficient amount of ETH in the SGRToken contract.
     * @return The address of the reserve-wallet and the deficient amount of ETH in the SGRToken contract.
     */
    function getDepositParams() external view returns (address, uint256);

    /**
     * @dev Get the address of the reserve-wallet and the excessive amount of ETH in the SGRToken contract.
     * @return The address of the reserve-wallet and the excessive amount of ETH in the SGRToken contract.
     */
    function getWithdrawParams() external view returns (address, uint256);
}

// File: contracts/contract_address_locator/interfaces/IContractAddressLocator.sol

/**
 * @title Contract Address Locator Interface.
 */
interface IContractAddressLocator {
    /**
     * @dev Get the contract address mapped to a given identifier.
     * @param _identifier The identifier.
     * @return The contract address.
     */
    function getContractAddress(bytes32 _identifier) external view returns (address);

    /**
     * @dev Determine whether or not a contract address relates to one of the identifiers.
     * @param _contractAddress The contract address to look for.
     * @param _identifiers The identifiers.
     * @return A boolean indicating if the contract address relates to one of the identifiers.
     */
    function isContractAddressRelates(address _contractAddress, bytes32[] _identifiers) external view returns (bool);
}

// File: contracts/contract_address_locator/ContractAddressLocatorHolder.sol

/**
 * @title Contract Address Locator Holder.
 * @dev Hold a contract address locator, which maps a unique identifier to every contract address in the system.
 * @dev Any contract which inherits from this contract can retrieve the address of any contract in the system.
 * @dev Thus, any contract can remain "oblivious" to the replacement of any other contract in the system.
 * @dev In addition to that, any function in any contract can be restricted to a specific caller.
 */
contract ContractAddressLocatorHolder {
    bytes32 internal constant _IAuthorizationDataSource_ = "IAuthorizationDataSource";
    bytes32 internal constant _ISGNConversionManager_    = "ISGNConversionManager"      ;
    bytes32 internal constant _IModelDataSource_         = "IModelDataSource"        ;
    bytes32 internal constant _IPaymentHandler_          = "IPaymentHandler"            ;
    bytes32 internal constant _IPaymentManager_          = "IPaymentManager"            ;
    bytes32 internal constant _IPaymentQueue_            = "IPaymentQueue"              ;
    bytes32 internal constant _IReconciliationAdjuster_  = "IReconciliationAdjuster"      ;
    bytes32 internal constant _IIntervalIterator_        = "IIntervalIterator"       ;
    bytes32 internal constant _IMintHandler_             = "IMintHandler"            ;
    bytes32 internal constant _IMintListener_            = "IMintListener"           ;
    bytes32 internal constant _IMintManager_             = "IMintManager"            ;
    bytes32 internal constant _IPriceBandCalculator_     = "IPriceBandCalculator"       ;
    bytes32 internal constant _IModelCalculator_         = "IModelCalculator"        ;
    bytes32 internal constant _IRedButton_               = "IRedButton"              ;
    bytes32 internal constant _IReserveManager_          = "IReserveManager"         ;
    bytes32 internal constant _ISagaExchanger_           = "ISagaExchanger"          ;
    bytes32 internal constant _ISogurExchanger_           = "ISogurExchanger"          ;
    bytes32 internal constant _SgnToSgrExchangeInitiator_ = "SgnToSgrExchangeInitiator"          ;
    bytes32 internal constant _IMonetaryModel_               = "IMonetaryModel"              ;
    bytes32 internal constant _IMonetaryModelState_          = "IMonetaryModelState"         ;
    bytes32 internal constant _ISGRAuthorizationManager_ = "ISGRAuthorizationManager";
    bytes32 internal constant _ISGRToken_                = "ISGRToken"               ;
    bytes32 internal constant _ISGRTokenManager_         = "ISGRTokenManager"        ;
    bytes32 internal constant _ISGRTokenInfo_         = "ISGRTokenInfo"        ;
    bytes32 internal constant _ISGNAuthorizationManager_ = "ISGNAuthorizationManager";
    bytes32 internal constant _ISGNToken_                = "ISGNToken"               ;
    bytes32 internal constant _ISGNTokenManager_         = "ISGNTokenManager"        ;
    bytes32 internal constant _IMintingPointTimersManager_             = "IMintingPointTimersManager"            ;
    bytes32 internal constant _ITradingClasses_          = "ITradingClasses"         ;
    bytes32 internal constant _IWalletsTradingLimiterValueConverter_        = "IWalletsTLValueConverter"       ;
    bytes32 internal constant _BuyWalletsTradingDataSource_       = "BuyWalletsTradingDataSource"      ;
    bytes32 internal constant _SellWalletsTradingDataSource_       = "SellWalletsTradingDataSource"      ;
    bytes32 internal constant _WalletsTradingLimiter_SGNTokenManager_          = "WalletsTLSGNTokenManager"         ;
    bytes32 internal constant _BuyWalletsTradingLimiter_SGRTokenManager_          = "BuyWalletsTLSGRTokenManager"         ;
    bytes32 internal constant _SellWalletsTradingLimiter_SGRTokenManager_          = "SellWalletsTLSGRTokenManager"         ;
    bytes32 internal constant _IETHConverter_             = "IETHConverter"   ;
    bytes32 internal constant _ITransactionLimiter_      = "ITransactionLimiter"     ;
    bytes32 internal constant _ITransactionManager_      = "ITransactionManager"     ;
    bytes32 internal constant _IRateApprover_      = "IRateApprover"     ;
    bytes32 internal constant _SGAToSGRInitializer_      = "SGAToSGRInitializer"     ;

    IContractAddressLocator private contractAddressLocator;

    /**
     * @dev Create the contract.
     * @param _contractAddressLocator The contract address locator.
     */
    constructor(IContractAddressLocator _contractAddressLocator) internal {
        require(_contractAddressLocator != address(0), "locator is illegal");
        contractAddressLocator = _contractAddressLocator;
    }

    /**
     * @dev Get the contract address locator.
     * @return The contract address locator.
     */
    function getContractAddressLocator() external view returns (IContractAddressLocator) {
        return contractAddressLocator;
    }

    /**
     * @dev Get the contract address mapped to a given identifier.
     * @param _identifier The identifier.
     * @return The contract address.
     */
    function getContractAddress(bytes32 _identifier) internal view returns (address) {
        return contractAddressLocator.getContractAddress(_identifier);
    }



    /**
     * @dev Determine whether or not the sender relates to one of the identifiers.
     * @param _identifiers The identifiers.
     * @return A boolean indicating if the sender relates to one of the identifiers.
     */
    function isSenderAddressRelates(bytes32[] _identifiers) internal view returns (bool) {
        return contractAddressLocator.isContractAddressRelates(msg.sender, _identifiers);
    }

    /**
     * @dev Verify that the caller is mapped to a given identifier.
     * @param _identifier The identifier.
     */
    modifier only(bytes32 _identifier) {
        require(msg.sender == getContractAddress(_identifier), "caller is illegal");
        _;
    }

}

// File: contracts/saga-genesis/interfaces/ISogurExchanger.sol

/**
 * @title Sogur Exchanger Interface.
 */
interface ISogurExchanger {
    /**
     * @dev Transfer SGR to an SGN holder.
     * @param _to The address of the SGN holder.
     * @param _value The amount of SGR to transfer.
     */
    function transferSgrToSgnHolder(address _to, uint256 _value) external;
}

// File: openzeppelin-solidity/contracts/token/ERC20/IERC20.sol

/**
 * @title ERC20 interface
 * @dev see https://github.com/ethereum/EIPs/issues/20
 */
interface IERC20 {
  function totalSupply() external view returns (uint256);

  function balanceOf(address who) external view returns (uint256);

  function allowance(address owner, address spender)
    external view returns (uint256);

  function transfer(address to, uint256 value) external returns (bool);

  function approve(address spender, uint256 value)
    external returns (bool);

  function transferFrom(address from, address to, uint256 value)
    external returns (bool);

  event Transfer(
    address indexed from,
    address indexed to,
    uint256 value
  );

  event Approval(
    address indexed owner,
    address indexed spender,
    uint256 value
  );
}

// File: openzeppelin-solidity/contracts/math/SafeMath.sol

/**
 * @title SafeMath
 * @dev Math operations with safety checks that revert on error
 */
library SafeMath {

  /**
  * @dev Multiplies two numbers, reverts on overflow.
  */
  function mul(uint256 a, uint256 b) internal pure returns (uint256) {
    // Gas optimization: this is cheaper than requiring 'a' not being zero, but the
    // benefit is lost if 'b' is also tested.
    // See: https://github.com/OpenZeppelin/openzeppelin-solidity/pull/522
    if (a == 0) {
      return 0;
    }

    uint256 c = a * b;
    require(c / a == b);

    return c;
  }

  /**
  * @dev Integer division of two numbers truncating the quotient, reverts on division by zero.
  */
  function div(uint256 a, uint256 b) internal pure returns (uint256) {
    require(b > 0); // Solidity only automatically asserts 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 Subtracts two numbers, reverts on overflow (i.e. if subtrahend is greater than minuend).
  */
  function sub(uint256 a, uint256 b) internal pure returns (uint256) {
    require(b <= a);
    uint256 c = a - b;

    return c;
  }

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

    return c;
  }

  /**
  * @dev Divides two numbers and returns the remainder (unsigned integer modulo),
  * reverts when dividing by zero.
  */
  function mod(uint256 a, uint256 b) internal pure returns (uint256) {
    require(b != 0);
    return a % b;
  }
}

// File: openzeppelin-solidity/contracts/token/ERC20/ERC20.sol

/**
 * @title Standard ERC20 token
 *
 * @dev Implementation of the basic standard token.
 * https://github.com/ethereum/EIPs/blob/master/EIPS/eip-20.md
 * Originally based on code by FirstBlood: https://github.com/Firstbloodio/token/blob/master/smart_contract/FirstBloodToken.sol
 */
contract ERC20 is IERC20 {
  using SafeMath for uint256;

  mapping (address => uint256) private _balances;

  mapping (address => mapping (address => uint256)) private _allowed;

  uint256 private _totalSupply;

  /**
  * @dev Total number of tokens in existence
  */
  function totalSupply() public view returns (uint256) {
    return _totalSupply;
  }

  /**
  * @dev Gets the balance of the specified address.
  * @param owner The address to query the balance of.
  * @return An uint256 representing the amount owned by the passed address.
  */
  function balanceOf(address owner) public view returns (uint256) {
    return _balances[owner];
  }

  /**
   * @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];
  }

  /**
  * @dev Transfer token for a specified address
  * @param to The address to transfer to.
  * @param value The amount to be transferred.
  */
  function transfer(address to, uint256 value) public returns (bool) {
    _transfer(msg.sender, to, value);
    return true;
  }

  /**
   * @dev Approve the passed address to spend the specified amount of tokens on behalf of msg.sender.
   * Beware that changing an allowance with this method brings the risk that someone may use both the old
   * and the new allowance by unfortunate transaction ordering. One possible solution to mitigate this
   * race condition is to first reduce the spender's allowance to 0 and set the desired value afterwards:
   * https://github.com/ethereum/EIPs/issues/20#issuecomment-263524729
   * @param spender The address which will spend the funds.
   * @param value The amount of tokens to be spent.
   */
  function approve(address spender, uint256 value) public returns (bool) {
    require(spender != address(0));

    _allowed[msg.sender][spender] = value;
    emit Approval(msg.sender, spender, value);
    return true;
  }

  /**
   * @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 value uint256 the amount of tokens to be transferred
   */
  function transferFrom(
    address from,
    address to,
    uint256 value
  )
    public
    returns (bool)
  {
    require(value <= _allowed[from][msg.sender]);

    _allowed[from][msg.sender] = _allowed[from][msg.sender].sub(value);
    _transfer(from, to, value);
    return true;
  }

  /**
   * @dev Increase the amount of tokens that an owner allowed to a spender.
   * approve should be called when allowed_[_spender] == 0. To increment
   * allowed value is better to use this function to avoid 2 calls (and wait until
   * the first transaction is mined)
   * From MonolithDAO Token.sol
   * @param spender The address which will spend the funds.
   * @param addedValue The amount of tokens to increase the allowance by.
   */
  function increaseAllowance(
    address spender,
    uint256 addedValue
  )
    public
    returns (bool)
  {
    require(spender != address(0));

    _allowed[msg.sender][spender] = (
      _allowed[msg.sender][spender].add(addedValue));
    emit Approval(msg.sender, spender, _allowed[msg.sender][spender]);
    return true;
  }

  /**
   * @dev Decrease the amount of tokens that an owner allowed to a spender.
   * approve should be called when allowed_[_spender] == 0. To decrement
   * allowed value is better to use this function to avoid 2 calls (and wait until
   * the first transaction is mined)
   * From MonolithDAO Token.sol
   * @param spender The address which will spend the funds.
   * @param subtractedValue The amount of tokens to decrease the allowance by.
   */
  function decreaseAllowance(
    address spender,
    uint256 subtractedValue
  )
    public
    returns (bool)
  {
    require(spender != address(0));

    _allowed[msg.sender][spender] = (
      _allowed[msg.sender][spender].sub(subtractedValue));
    emit Approval(msg.sender, spender, _allowed[msg.sender][spender]);
    return true;
  }

  /**
  * @dev Transfer token for a specified addresses
  * @param from The address to transfer from.
  * @param to The address to transfer to.
  * @param value The amount to be transferred.
  */
  function _transfer(address from, address to, uint256 value) internal {
    require(value <= _balances[from], "sdjfndskjfndskjfb");
    require(to != address(0), "asfdsf");

    _balances[from] = _balances[from].sub(value);
    _balances[to] = _balances[to].add(value);
    emit Transfer(from, to, value);
  }

  /**
   * @dev Internal function that mints an amount of the token and assigns it to
   * an account. This encapsulates the modification of balances such that the
   * proper events are emitted.
   * @param account The account that will receive the created tokens.
   * @param value The amount that will be created.
   */
  function _mint(address account, uint256 value) internal {
    require(account != 0);
    _totalSupply = _totalSupply.add(value);
    _balances[account] = _balances[account].add(value);
    emit Transfer(address(0), account, value);
  }

  /**
   * @dev Internal function that burns an amount of the token of a given
   * account.
   * @param account The account whose tokens will be burnt.
   * @param value The amount that will be burnt.
   */
  function _burn(address account, uint256 value) internal {
    require(account != 0, "heerrrrrsss");
    require(value <= _balances[account], "heerrrrr");

    _totalSupply = _totalSupply.sub(value);
    _balances[account] = _balances[account].sub(value);
    emit Transfer(account, address(0), value);
  }

  /**
   * @dev Internal function that burns an amount of the token of a given
   * account, deducting from the sender's allowance for said account. Uses the
   * internal burn function.
   * @param account The account whose tokens will be burnt.
   * @param value The amount that will be burnt.
   */
  function _burnFrom(address account, uint256 value) internal {
    require(value <= _allowed[account][msg.sender]);

    // Should https://github.com/OpenZeppelin/zeppelin-solidity/issues/707 be accepted,
    // this function needs to emit an event with the updated approval.
    _allowed[account][msg.sender] = _allowed[account][msg.sender].sub(
      value);
    _burn(account, value);
  }
}

// File: contracts/sogur/interfaces/ISGRTokenInfo.sol

/**
 * @title SGR Token Info Interface.
 */
interface ISGRTokenInfo {
    /**
     * @return the name of the sgr token.
     */
    function getName() external pure returns (string);

    /**
     * @return the symbol of the sgr token.
     */
    function getSymbol() external pure returns (string);

    /**
     * @return the number of decimals of the sgr token.
     */
    function getDecimals() external pure returns (uint8);
}

// File: contracts/sogur/SGRToken.sol

/**
 * Details of usage of licenced software see here: https://www.sogur.com/software/readme_v1
 */

/**
 * @title Sogur Token.
 * @dev ERC20 compatible.
 * @dev Exchange ETH for SGR.
 * @dev Exchange SGR for ETH.
 */
contract SGRToken is ERC20, ContractAddressLocatorHolder, IMintListener, ISogurExchanger, IPaymentHandler {
    string public constant VERSION = "2.0.0";

    bool public initialized;

    event SgrTokenInitialized(address indexed _initializer, address _sgaToSGRTokenExchangeAddress, uint256 _sgaToSGRTokenExchangeSGRSupply);


    /**
     * @dev Public Address 0x6e9Cd21f2B9033ea0953943c81A041fe203D5E55.
     * @notice SGR will be minted at this public address for SGN holders.
     * @notice SGR will be transferred from this public address upon conversion by an SGN holder.
     * @notice It is generated in a manner which ensures that the corresponding private key is unknown.
     */
    address public constant SGR_MINTED_FOR_SGN_HOLDERS = address(keccak256("SGR_MINTED_FOR_SGN_HOLDERS"));

    /**
     * @dev Create the contract.
     * @param _contractAddressLocator The contract address locator.
     */
    constructor(IContractAddressLocator _contractAddressLocator) ContractAddressLocatorHolder(_contractAddressLocator) public {}

    /**
     * @dev Return the contract which implements the ISGRTokenManager interface.
     */
    function getSGRTokenManager() public view returns (ISGRTokenManager) {
        return ISGRTokenManager(getContractAddress(_ISGRTokenManager_));
    }

    /**
    * @dev Return the contract which implements ISGRTokenInfo interface.
    */
    function getSGRTokenInfo() public view returns (ISGRTokenInfo) {
        return ISGRTokenInfo(getContractAddress(_ISGRTokenInfo_));
    }

    /**
    * @dev Return the sgr token name.
    */
    function name() public view returns (string) {
        return getSGRTokenInfo().getName();
    }

    /**
     * @dev Return the sgr token symbol.
     */
    function symbol() public view returns (string){
        return getSGRTokenInfo().getSymbol();
    }

    /**
     * @dev Return the sgr token number of decimals.
     */
    function decimals() public view returns (uint8){
        return getSGRTokenInfo().getDecimals();
    }

    /**
    * @dev Reverts if called when the contract is already initialized.
    */
    modifier onlyIfNotInitialized() {
        require(!initialized, "contract already initialized");
        _;
    }

    /**
     * @dev Exchange ETH for SGR.
     * @notice Can be executed from externally-owned accounts but not from other contracts.
     * @notice This is due to the insufficient gas-stipend provided to the fallback function.
     */
    function() external payable {
        ISGRTokenManager sgrTokenManager = getSGRTokenManager();
        uint256 amount = sgrTokenManager.exchangeEthForSgr(msg.sender, msg.value);
        _mint(msg.sender, amount);
        sgrTokenManager.afterExchangeEthForSgr(msg.sender, msg.value, amount);
    }

    /**
     * @dev Exchange ETH for SGR.
     * @notice Can be executed from externally-owned accounts as well as from other contracts.
     */
    function exchange() external payable {
        ISGRTokenManager sgrTokenManager = getSGRTokenManager();
        uint256 amount = sgrTokenManager.exchangeEthForSgr(msg.sender, msg.value);
        _mint(msg.sender, amount);
        sgrTokenManager.afterExchangeEthForSgr(msg.sender, msg.value, amount);
    }

    /**
     * @dev Initialize the contract.
     * @param _sgaToSGRTokenExchangeAddress the contract address.
     * @param _sgaToSGRTokenExchangeSGRSupply SGR supply for the SGAToSGRTokenExchange contract.
     */
    function init(address _sgaToSGRTokenExchangeAddress, uint256 _sgaToSGRTokenExchangeSGRSupply) external onlyIfNotInitialized only(_SGAToSGRInitializer_) {
        require(_sgaToSGRTokenExchangeAddress != address(0), "SGA to SGR token exchange address is illegal");
        initialized = true;
        _mint(_sgaToSGRTokenExchangeAddress, _sgaToSGRTokenExchangeSGRSupply);
        emit SgrTokenInitialized(msg.sender, _sgaToSGRTokenExchangeAddress, _sgaToSGRTokenExchangeSGRSupply);
    }


    /**
     * @dev Transfer SGR to another account.
     * @param _to The address of the destination account.
     * @param _value The amount of SGR to be transferred.
     * @return Status (true if completed successfully, false otherwise).
     * @notice If the destination account is this contract, then exchange SGR for ETH.
     */
    function transfer(address _to, uint256 _value) public returns (bool) {
        ISGRTokenManager sgrTokenManager = getSGRTokenManager();
        if (_to == address(this)) {
            uint256 amount = sgrTokenManager.exchangeSgrForEth(msg.sender, _value);
            _burn(msg.sender, _value);
            msg.sender.transfer(amount);
            return sgrTokenManager.afterExchangeSgrForEth(msg.sender, _value, amount);
        }
        sgrTokenManager.uponTransfer(msg.sender, _to, _value);
        bool transferResult = super.transfer(_to, _value);
        return sgrTokenManager.afterTransfer(msg.sender, _to, _value, transferResult);
    }

    /**
     * @dev Transfer SGR from one account to another.
     * @param _from The address of the source account.
     * @param _to The address of the destination account.
     * @param _value The amount of SGR to be transferred.
     * @return Status (true if completed successfully, false otherwise).
     * @notice If the destination account is this contract, then the operation is illegal.
     */
    function transferFrom(address _from, address _to, uint256 _value) public returns (bool) {
        ISGRTokenManager sgrTokenManager = getSGRTokenManager();
        require(_to != address(this), "custodian-transfer of SGR into this contract is illegal");
        sgrTokenManager.uponTransferFrom(msg.sender, _from, _to, _value);
        bool transferFromResult = super.transferFrom(_from, _to, _value);
        return sgrTokenManager.afterTransferFrom(msg.sender, _from, _to, _value, transferFromResult);
    }

    /**
     * @dev Deposit ETH into this contract.
     */
    function deposit() external payable {
        getSGRTokenManager().uponDeposit(msg.sender, address(this).balance, msg.value);
    }

    /**
     * @dev Withdraw ETH from this contract.
     */
    function withdraw() external {
        ISGRTokenManager sgrTokenManager = getSGRTokenManager();
        uint256 priorWithdrawEthBalance = address(this).balance;
        (address wallet, uint256 amount) = sgrTokenManager.uponWithdraw(msg.sender, priorWithdrawEthBalance);
        wallet.transfer(amount);
        sgrTokenManager.afterWithdraw(msg.sender, wallet, amount, priorWithdrawEthBalance, address(this).balance);
    }

    /**
     * @dev Mint SGR for SGN holders.
     * @param _value The amount of SGR to mint.
     */
    function mintSgrForSgnHolders(uint256 _value) external only(_IMintManager_) {
        ISGRTokenManager sgrTokenManager = getSGRTokenManager();
        sgrTokenManager.uponMintSgrForSgnHolders(_value);
        _mint(SGR_MINTED_FOR_SGN_HOLDERS, _value);
        sgrTokenManager.afterMintSgrForSgnHolders(_value);
    }

    /**
     * @dev Transfer SGR to an SGN holder.
     * @param _to The address of the SGN holder.
     * @param _value The amount of SGR to transfer.
     */
    function transferSgrToSgnHolder(address _to, uint256 _value) external only(_SgnToSgrExchangeInitiator_) {
        ISGRTokenManager sgrTokenManager = getSGRTokenManager();
        sgrTokenManager.uponTransferSgrToSgnHolder(_to, _value);
        _transfer(SGR_MINTED_FOR_SGN_HOLDERS, _to, _value);
        sgrTokenManager.afterTransferSgrToSgnHolder(_to, _value);
    }

    /**
     * @dev Transfer ETH to an SGR holder.
     * @param _to The address of the SGR holder.
     * @param _value The amount of ETH to transfer.
     */
    function transferEthToSgrHolder(address _to, uint256 _value) external only(_IPaymentManager_) {
        bool status = _to.send(_value);
        getSGRTokenManager().postTransferEthToSgrHolder(_to, _value, status);
    }

    /**
     * @dev Get the amount of available ETH.
     * @return The amount of available ETH.
     */
    function getEthBalance() external view returns (uint256) {
        return address(this).balance;
    }

    /**
     * @dev Get the address of the reserve-wallet and the deficient amount of ETH in this contract.
     * @return The address of the reserve-wallet and the deficient amount of ETH in this contract.
     */
    function getDepositParams() external view returns (address, uint256) {
        return getSGRTokenManager().getDepositParams();
    }

    /**
     * @dev Get the address of the reserve-wallet and the excessive amount of ETH in this contract.
     * @return The address of the reserve-wallet and the excessive amount of ETH in this contract.
     */
    function getWithdrawParams() external view returns (address, uint256) {
        return getSGRTokenManager().getWithdrawParams();
    }
}

Contract Security Audit

Contract ABI

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Constructor Arguments (ABI-Encoded and is the last bytes of the Contract Creation Code above)

000000000000000000000000aabcd54faf94925adbe0df117c62961acecbacdb

-----Decoded View---------------
Arg [0] : _contractAddressLocator (address): 0xaAbcd54Faf94925ADBE0df117C62961AcEcBACDb

-----Encoded View---------------
1 Constructor Arguments found :
Arg [0] : 000000000000000000000000aabcd54faf94925adbe0df117c62961acecbacdb


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OVERVIEW

SGR is a currency designed to be the democratic evolution of money. SGR is using stabilization mechanisms to temper the risk of value loss in unpredictable market conditions.

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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.