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1 address found via
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Method
Block
From
To
Transfer133393962021-10-02 10:44:571607 days ago1633171497IN
Sogur: Old SGA Token
0 ETH0.0027201148
Transfer117245412021-01-25 11:20:361857 days ago1611573636IN
Sogur: Old SGA Token
0 ETH0.00713978107
Transfer115478232020-12-29 8:27:101884 days ago1609230430IN
Sogur: Old SGA Token
0 ETH0.0027545275
Transfer115478232020-12-29 8:27:101884 days ago1609230430IN
Sogur: Old SGA Token
0 ETH0.0027536275
Transfer115478232020-12-29 8:27:101884 days ago1609230430IN
Sogur: Old SGA Token
0 ETH0.0027545275
Transfer115478232020-12-29 8:27:101884 days ago1609230430IN
Sogur: Old SGA Token
0 ETH0.0027545275
Transfer115478232020-12-29 8:27:101884 days ago1609230430IN
Sogur: Old SGA Token
0 ETH0.0027545275
Transfer113239612020-11-24 23:16:031918 days ago1606259763IN
Sogur: Old SGA Token
0 ETH0.0017069933
Transfer113189132020-11-24 4:49:121919 days ago1606193352IN
Sogur: Old SGA Token
0 ETH0.0031856461.6
Transfer113172322020-11-23 22:41:201919 days ago1606171280IN
Sogur: Old SGA Token
0 ETH0.0022043460
Transfer112900372020-11-19 18:13:241924 days ago1605809604IN
Sogur: Old SGA Token
0 ETH0.0020695640
Transfer111885432020-11-04 4:31:061939 days ago1604464266IN
Sogur: Old SGA Token
0 ETH0.000832816.1
Transfer111702142020-11-01 8:57:441942 days ago1604221064IN
Sogur: Old SGA Token
0 ETH0.0010340620
Transfer111574822020-10-30 9:57:231944 days ago1604051843IN
Sogur: Old SGA Token
0 ETH0.0027177974
Transfer111461722020-10-28 16:14:181946 days ago1603901658IN
Sogur: Old SGA Token
0 ETH0.0013735837.4
Transfer111170362020-10-24 4:57:181950 days ago1603515438IN
Sogur: Old SGA Token
0 ETH0.0005876316
Transfer110944022020-10-20 17:41:241954 days ago1603215684IN
Sogur: Old SGA Token
0 ETH0.00531589117
Transfer110885902020-10-19 20:13:071954 days ago1603138387IN
Sogur: Old SGA Token
0 ETH0.001217440
Transfer110885212020-10-19 19:55:311954 days ago1603137331IN
Sogur: Old SGA Token
0 ETH0.0007919326
Transfer110884432020-10-19 19:39:051954 days ago1603136345IN
Sogur: Old SGA Token
0 ETH0.0007919326
Transfer110884422020-10-19 19:39:011954 days ago1603136341IN
Sogur: Old SGA Token
0 ETH0.0011819326
Transfer110882932020-10-19 19:06:521954 days ago1603134412IN
Sogur: Old SGA Token
0 ETH0.0008826129
Transfer110878162020-10-19 17:30:151955 days ago1603128615IN
Sogur: Old SGA Token
0 ETH0.004834880
Transfer110877932020-10-19 17:24:121955 days ago1603128252IN
Sogur: Old SGA Token
0 ETH0.0036338480
Transfer110877582020-10-19 17:16:181955 days ago1603127778IN
Sogur: Old SGA Token
0 ETH0.002480
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Latest 25 internal transactions (View All)

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Parent Transaction Hash Method Block
From
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-108143652020-09-07 11:56:271997 days ago1599479787
Sogur: Old SGA Token
15 ETH
-107616192020-08-30 10:27:302005 days ago1598783250
Sogur: Old SGA Token
24.7 ETH
-107298292020-08-25 13:25:472010 days ago1598361947
Sogur: Old SGA Token
50.491 ETH
-106452162020-08-12 12:49:272023 days ago1597236567
Sogur: Old SGA Token
31.0100558 ETH
-105999082020-08-05 13:07:322030 days ago1596632852
Sogur: Old SGA Token
0.0269249 ETH
-105989292020-08-05 9:21:532030 days ago1596619313
Sogur: Old SGA Token
0.0269249 ETH
-105988652020-08-05 9:07:082030 days ago1596618428
Sogur: Old SGA Token
0.0269249 ETH
-105988482020-08-05 9:02:122030 days ago1596618132
Sogur: Old SGA Token
0.0269249 ETH
-105988432020-08-05 9:01:082030 days ago1596618068
Sogur: Old SGA Token
0.0269249 ETH
-105568182020-07-29 20:56:562036 days ago1596056216
Sogur: Old SGA Token
0.04 ETH
-105567982020-07-29 20:51:272036 days ago1596055887
Sogur: Old SGA Token
0.02 ETH
-105567802020-07-29 20:46:292036 days ago1596055589
Sogur: Old SGA Token
0.01 ETH
-105547092020-07-29 13:13:192037 days ago1596028399
Sogur: Old SGA Token
0.01 ETH
-105482732020-07-28 13:24:232038 days ago1595942663
Sogur: Old SGA Token
0.00004419 ETH
-105323422020-07-26 2:27:032040 days ago1595730423
Sogur: Old SGA Token
18.8 ETH
-105104992020-07-22 17:21:392044 days ago1595438499
Sogur: Old SGA Token
23.38146496 ETH
-103940092020-07-04 16:33:462062 days ago1593880426
Sogur: Old SGA Token
50.80410453 ETH
-103591162020-06-29 6:25:412067 days ago1593411941
Sogur: Old SGA Token
0.0000612 ETH
-103085892020-06-21 10:31:382075 days ago1592735498
Sogur: Old SGA Token
16.41633544 ETH
-99788242020-05-01 6:51:202126 days ago1588315880
Sogur: Old SGA Token
71 ETH
-99485702020-04-26 14:09:332131 days ago1587910173
Sogur: Old SGA Token
55.24150305 ETH
-99023502020-04-19 10:38:142138 days ago1587292694
Sogur: Old SGA Token
54.7 ETH
-98637732020-04-13 11:46:012144 days ago1586778361
Sogur: Old SGA Token
77.99 ETH
-98574332020-04-12 12:11:412145 days ago1586693501
Sogur: Old SGA Token
98.17356289 ETH
-97287822020-03-23 16:33:102165 days ago1584981190
Sogur: Old SGA Token
1,914 ETH
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Contract Source Code Verified (Exact Match)

Contract Name:
SGAToken

Compiler Version
v0.4.25+commit.59dbf8f1

Optimization Enabled:
Yes with 6000 runs

Other Settings:
default evmVersion, GNU GPLv3 license
/**
 *Submitted for verification at Etherscan.io on 2019-11-27
*/

pragma solidity 0.4.25;

// File: contracts/saga/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 SGA holder.
     * @param _to The address of the SGA holder.
     * @param _value The amount of ETH to transfer.
     */
    function transferEthToSgaHolder(address _to, uint256 _value) external;
}

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

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

// File: contracts/saga/interfaces/ISGATokenManager.sol

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

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

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

    /**
     * @dev Handle custodian SGA 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 SGA to be transferred.
     */
    function uponTransferFrom(address _sender, address _from, address _to, uint256 _value) external;

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

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

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

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

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

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

    /**
     * @dev Get the address of the reserve-wallet and the excessive amount of ETH in the SGAToken contract.
     * @return The address of the reserve-wallet and the excessive amount of ETH in the SGAToken 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 _IMonetaryModel_               = "IMonetaryModel"              ;
    bytes32 internal constant _IMonetaryModelState_          = "IMonetaryModelState"         ;
    bytes32 internal constant _ISGAAuthorizationManager_ = "ISGAAuthorizationManager";
    bytes32 internal constant _ISGAToken_                = "ISGAToken"               ;
    bytes32 internal constant _ISGATokenManager_         = "ISGATokenManager"        ;
    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 _IWalletsTradingDataSource_       = "IWalletsTradingDataSource"      ;
    bytes32 internal constant _WalletsTradingLimiter_SGNTokenManager_          = "WalletsTLSGNTokenManager"         ;
    bytes32 internal constant _WalletsTradingLimiter_SGATokenManager_          = "WalletsTLSGATokenManager"         ;
    bytes32 internal constant _IETHConverter_             = "IETHConverter"   ;
    bytes32 internal constant _ITransactionLimiter_      = "ITransactionLimiter"     ;
    bytes32 internal constant _ITransactionManager_      = "ITransactionManager"     ;
    bytes32 internal constant _IRateApprover_      = "IRateApprover"     ;

    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/ISagaExchanger.sol

/**
 * @title Saga Exchanger Interface.
 */
interface ISagaExchanger {
    /**
     * @dev Transfer SGA to an SGN holder.
     * @param _to The address of the SGN holder.
     * @param _value The amount of SGA to transfer.
     */
    function transferSgaToSgnHolder(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]);
    require(to != address(0));

    _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);
    require(value <= _balances[account]);

    _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/saga/SGAToken.sol

/**
 * Details of usage of licenced software see here: https://www.saga.org/software/readme_v1
 */

/**
 * @title Saga Token.
 * @dev ERC20 compatible.
 * @dev Exchange ETH for SGA.
 * @dev Exchange SGA for ETH.
 */
contract SGAToken is ERC20, ContractAddressLocatorHolder, IMintListener, ISagaExchanger, IPaymentHandler {
    string public constant VERSION = "1.0.0";

    string public constant name = "Saga";
    string public constant symbol = "SGA";
    uint8  public constant decimals = 18;

    /**
     * @dev Public Address 0x10063FCCf5eEE46fC65D399a7F5dd88730906CF9.
     * @notice SGA will be minted at this public address for SGN holders.
     * @notice SGA 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 SGA_MINTED_FOR_SGN_HOLDERS = address(keccak256("SGA_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 ISGATokenManager interface.
     */
    function getSGATokenManager() public view returns (ISGATokenManager) {
        return ISGATokenManager(getContractAddress(_ISGATokenManager_));
    }

    /**
     * @dev Exchange ETH for SGA.
     * @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 {
        uint256 amount = getSGATokenManager().exchangeEthForSga(msg.sender, msg.value);
        _mint(msg.sender, amount);
    }

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

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

    /**
     * @dev Transfer SGA 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 SGA 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) {
        require(_to != address(this), "custodian-transfer of SGA into this contract is illegal");
        getSGATokenManager().uponTransferFrom(msg.sender, _from, _to, _value);
        return super.transferFrom(_from, _to, _value);
    }

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

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

    /**
     * @dev Mint SGA for SGN holders.
     * @param _value The amount of SGA to mint.
     */
    function mintSgaForSgnHolders(uint256 _value) external only(_IMintManager_) {
        getSGATokenManager().uponMintSgaForSgnHolders(_value);
        _mint(SGA_MINTED_FOR_SGN_HOLDERS, _value);
    }

    /**
     * @dev Transfer SGA to an SGN holder.
     * @param _to The address of the SGN holder.
     * @param _value The amount of SGA to transfer.
     */
    function transferSgaToSgnHolder(address _to, uint256 _value) external only(_ISGNToken_) {
        getSGATokenManager().uponTransferSgaToSgnHolder(_to, _value);
        _transfer(SGA_MINTED_FOR_SGN_HOLDERS, _to, _value);
    }

    /**
     * @dev Transfer ETH to an SGA holder.
     * @param _to The address of the SGA holder.
     * @param _value The amount of ETH to transfer.
     */
    function transferEthToSgaHolder(address _to, uint256 _value) external only(_IPaymentManager_) {
        bool status = _to.send(_value);
        getSGATokenManager().postTransferEthToSgaHolder(_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 getSGATokenManager().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 getSGATokenManager().getWithdrawParams();
    }
}

Contract Security Audit

Contract ABI

API
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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


Swarm Source

bzzr://cce51a801a9711b3368f01322bda5566f7110b3a843141414dc75766f448238a

Block Uncle Number Difficulty Gas Used Reward
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OVERVIEW

Saga (SGA) is a reserve-backed worldwide money, complementing national currencies, accepted by acclaimed financial institutions and governed by its holders.

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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.