ETH Price: $1,875.11 (-0.16%)

Transaction Decoder

Block:
11069103 at Oct-16-2020 08:30:28 PM +UTC
Transaction Fee:
0.003687476423700668 ETH $6.91
Gas Used:
185,677 Gas / 19.859629484 Gwei

Emitted Events:

275 ETGFinance.Transfer( from=[Receiver] AdminUpgradeabilityProxy, to=[Sender] 0x7ab39b2dea7aed327468ab3248da602f3525b10c, tokens=141249999999999998964 )
276 AdminUpgradeabilityProxy.0xd6d4f5681c246c9f42c203e287975af1601f8df8035a9251f79aab5c8f09e2f8( 0xd6d4f5681c246c9f42c203e287975af1601f8df8035a9251f79aab5c8f09e2f8, 000000000000000000000000f14e2952a6a71c342cba3d7aa4ed932151964945, 0000000000000000000000007ab39b2dea7aed327468ab3248da602f3525b10c, 00000000000000000000000074603e780545d02c4257e7d2be19c74de7be1952, 0000000000000000000000000000000000000000000000000000000000000000, 000000000000000000000000000000000000000000000007a83ccea01becfbf4, 0000000000000000000000000000000000000000000000001158e460913d0000 )

Account State Difference:

  Address   Before After State Difference Code
0x73282A63...1ecA3C86A
(Bounce Finance: Bounce Swap Proxy)
0x74603e78...dE7BE1952
0x7ab39b2d...f3525b10C
1.303511562555370446 Eth
Nonce: 407
0.049824086131669778 Eth
Nonce: 408
1.253687476423700668
(F2Pool Old)
4,058.316348447521310344 Eth4,058.320035923945011012 Eth0.003687476423700668
0x98945BC6...c2431c48E 110.18771270938775769 Eth110.20021270938775769 Eth0.0125
0xF14e2952...151964945
(ETG Finance: Deployer)
144.613988339341835125 Eth145.851488339341835125 Eth1.2375

Execution Trace

ETH 1.25 AdminUpgradeabilityProxy.aed35147( )
  • ETH 1.25 0x8564e1e7457bce44d8f5f8683b4d48ebeec8b4f3.aed35147( )
    • ETGFinance.transfer( to=0x7ab39b2deA7AeD327468AB3248da602f3525b10C, tokens=141249999999999998964 ) => ( success=True )
    • ETH 1.2375 ETG Finance: Deployer.CALL( )
    • ETH 0.0125 AdminUpgradeabilityProxy.CALL( )
      • ETH 0.0125 0x89987719c6048f3094922575c5fe8e75614aaf4f.DELEGATECALL( )
        File 1 of 3: AdminUpgradeabilityProxy
        // File: @openzeppelin/upgrades/contracts/upgradeability/Proxy.sol
        
        pragma solidity ^0.5.0;
        
        /**
         * @title Proxy
         * @dev Implements delegation of calls to other contracts, with proper
         * forwarding of return values and bubbling of failures.
         * It defines a fallback function that delegates all calls to the address
         * returned by the abstract _implementation() internal function.
         */
        contract Proxy {
          /**
           * @dev Fallback function.
           * Implemented entirely in `_fallback`.
           */
          function () payable external {
            _fallback();
          }
        
          /**
           * @return The Address of the implementation.
           */
          function _implementation() internal view returns (address);
        
          /**
           * @dev Delegates execution to an implementation contract.
           * This is a low level function that doesn't return to its internal call site.
           * It will return to the external caller whatever the implementation returns.
           * @param implementation Address to delegate.
           */
          function _delegate(address implementation) internal {
            assembly {
              // Copy msg.data. We take full control of memory in this inline assembly
              // block because it will not return to Solidity code. We overwrite the
              // Solidity scratch pad at memory position 0.
              calldatacopy(0, 0, calldatasize)
        
              // Call the implementation.
              // out and outsize are 0 because we don't know the size yet.
              let result := delegatecall(gas, implementation, 0, calldatasize, 0, 0)
        
              // Copy the returned data.
              returndatacopy(0, 0, returndatasize)
        
              switch result
              // delegatecall returns 0 on error.
              case 0 { revert(0, returndatasize) }
              default { return(0, returndatasize) }
            }
          }
        
          /**
           * @dev Function that is run as the first thing in the fallback function.
           * Can be redefined in derived contracts to add functionality.
           * Redefinitions must call super._willFallback().
           */
          function _willFallback() internal {
          }
        
          /**
           * @dev fallback implementation.
           * Extracted to enable manual triggering.
           */
          function _fallback() internal {
            _willFallback();
            _delegate(_implementation());
          }
        }
        
        // File: @openzeppelin/upgrades/contracts/utils/Address.sol
        
        pragma solidity ^0.5.0;
        
        /**
         * Utility library of inline functions on addresses
         *
         * Source https://raw.githubusercontent.com/OpenZeppelin/openzeppelin-solidity/v2.1.3/contracts/utils/Address.sol
         * This contract is copied here and renamed from the original to avoid clashes in the compiled artifacts
         * when the user imports a zos-lib contract (that transitively causes this contract to be compiled and added to the
         * build/artifacts folder) as well as the vanilla Address implementation from an openzeppelin version.
         */
        library OpenZeppelinUpgradesAddress {
            /**
             * Returns whether the target address is a contract
             * @dev This function will return false if invoked during the constructor of a contract,
             * as the code is not actually created until after the constructor finishes.
             * @param account address of the account to check
             * @return whether the target address is a contract
             */
            function isContract(address account) internal view returns (bool) {
                uint256 size;
                // XXX Currently there is no better way to check if there is a contract in an address
                // than to check the size of the code at that address.
                // See https://ethereum.stackexchange.com/a/14016/36603
                // for more details about how this works.
                // TODO Check this again before the Serenity release, because all addresses will be
                // contracts then.
                // solhint-disable-next-line no-inline-assembly
                assembly { size := extcodesize(account) }
                return size > 0;
            }
        }
        
        // File: @openzeppelin/upgrades/contracts/upgradeability/BaseUpgradeabilityProxy.sol
        
        pragma solidity ^0.5.0;
        
        
        
        /**
         * @title BaseUpgradeabilityProxy
         * @dev This contract implements a proxy that allows to change the
         * implementation address to which it will delegate.
         * Such a change is called an implementation upgrade.
         */
        contract BaseUpgradeabilityProxy is Proxy {
          /**
           * @dev Emitted when the implementation is upgraded.
           * @param implementation Address of the new implementation.
           */
          event Upgraded(address indexed implementation);
        
          /**
           * @dev Storage slot with the address of the current implementation.
           * This is the keccak-256 hash of "eip1967.proxy.implementation" subtracted by 1, and is
           * validated in the constructor.
           */
          bytes32 internal constant IMPLEMENTATION_SLOT = 0x360894a13ba1a3210667c828492db98dca3e2076cc3735a920a3ca505d382bbc;
        
          /**
           * @dev Returns the current implementation.
           * @return Address of the current implementation
           */
          function _implementation() internal view returns (address impl) {
            bytes32 slot = IMPLEMENTATION_SLOT;
            assembly {
              impl := sload(slot)
            }
          }
        
          /**
           * @dev Upgrades the proxy to a new implementation.
           * @param newImplementation Address of the new implementation.
           */
          function _upgradeTo(address newImplementation) internal {
            _setImplementation(newImplementation);
            emit Upgraded(newImplementation);
          }
        
          /**
           * @dev Sets the implementation address of the proxy.
           * @param newImplementation Address of the new implementation.
           */
          function _setImplementation(address newImplementation) internal {
            require(OpenZeppelinUpgradesAddress.isContract(newImplementation), "Cannot set a proxy implementation to a non-contract address");
        
            bytes32 slot = IMPLEMENTATION_SLOT;
        
            assembly {
              sstore(slot, newImplementation)
            }
          }
        }
        
        // File: @openzeppelin/upgrades/contracts/upgradeability/UpgradeabilityProxy.sol
        
        pragma solidity ^0.5.0;
        
        
        /**
         * @title UpgradeabilityProxy
         * @dev Extends BaseUpgradeabilityProxy with a constructor for initializing
         * implementation and init data.
         */
        contract UpgradeabilityProxy is BaseUpgradeabilityProxy {
          /**
           * @dev Contract constructor.
           * @param _logic Address of the initial implementation.
           * @param _data Data to send as msg.data to the implementation to initialize the proxied contract.
           * It should include the signature and the parameters of the function to be called, as described in
           * https://solidity.readthedocs.io/en/v0.4.24/abi-spec.html#function-selector-and-argument-encoding.
           * This parameter is optional, if no data is given the initialization call to proxied contract will be skipped.
           */
          constructor(address _logic, bytes memory _data) public payable {
            assert(IMPLEMENTATION_SLOT == bytes32(uint256(keccak256('eip1967.proxy.implementation')) - 1));
            _setImplementation(_logic);
            if(_data.length > 0) {
              (bool success,) = _logic.delegatecall(_data);
              require(success);
            }
          }  
        }
        
        // File: @openzeppelin/upgrades/contracts/upgradeability/BaseAdminUpgradeabilityProxy.sol
        
        pragma solidity ^0.5.0;
        
        
        /**
         * @title BaseAdminUpgradeabilityProxy
         * @dev This contract combines an upgradeability proxy with an authorization
         * mechanism for administrative tasks.
         * All external functions in this contract must be guarded by the
         * `ifAdmin` modifier. See ethereum/solidity#3864 for a Solidity
         * feature proposal that would enable this to be done automatically.
         */
        contract BaseAdminUpgradeabilityProxy is BaseUpgradeabilityProxy {
          /**
           * @dev Emitted when the administration has been transferred.
           * @param previousAdmin Address of the previous admin.
           * @param newAdmin Address of the new admin.
           */
          event AdminChanged(address previousAdmin, address newAdmin);
        
          /**
           * @dev Storage slot with the admin of the contract.
           * This is the keccak-256 hash of "eip1967.proxy.admin" subtracted by 1, and is
           * validated in the constructor.
           */
        
          bytes32 internal constant ADMIN_SLOT = 0xb53127684a568b3173ae13b9f8a6016e243e63b6e8ee1178d6a717850b5d6103;
        
          /**
           * @dev Modifier to check whether the `msg.sender` is the admin.
           * If it is, it will run the function. Otherwise, it will delegate the call
           * to the implementation.
           */
          modifier ifAdmin() {
            if (msg.sender == _admin()) {
              _;
            } else {
              _fallback();
            }
          }
        
          /**
           * @return The address of the proxy admin.
           */
          function admin() external ifAdmin returns (address) {
            return _admin();
          }
        
          /**
           * @return The address of the implementation.
           */
          function implementation() external ifAdmin returns (address) {
            return _implementation();
          }
        
          /**
           * @dev Changes the admin of the proxy.
           * Only the current admin can call this function.
           * @param newAdmin Address to transfer proxy administration to.
           */
          function changeAdmin(address newAdmin) external ifAdmin {
            require(newAdmin != address(0), "Cannot change the admin of a proxy to the zero address");
            emit AdminChanged(_admin(), newAdmin);
            _setAdmin(newAdmin);
          }
        
          /**
           * @dev Upgrade the backing implementation of the proxy.
           * Only the admin can call this function.
           * @param newImplementation Address of the new implementation.
           */
          function upgradeTo(address newImplementation) external ifAdmin {
            _upgradeTo(newImplementation);
          }
        
          /**
           * @dev Upgrade the backing implementation of the proxy and call a function
           * on the new implementation.
           * This is useful to initialize the proxied contract.
           * @param newImplementation Address of the new implementation.
           * @param data Data to send as msg.data in the low level call.
           * It should include the signature and the parameters of the function to be called, as described in
           * https://solidity.readthedocs.io/en/v0.4.24/abi-spec.html#function-selector-and-argument-encoding.
           */
          function upgradeToAndCall(address newImplementation, bytes calldata data) payable external ifAdmin {
            _upgradeTo(newImplementation);
            (bool success,) = newImplementation.delegatecall(data);
            require(success);
          }
        
          /**
           * @return The admin slot.
           */
          function _admin() internal view returns (address adm) {
            bytes32 slot = ADMIN_SLOT;
            assembly {
              adm := sload(slot)
            }
          }
        
          /**
           * @dev Sets the address of the proxy admin.
           * @param newAdmin Address of the new proxy admin.
           */
          function _setAdmin(address newAdmin) internal {
            bytes32 slot = ADMIN_SLOT;
        
            assembly {
              sstore(slot, newAdmin)
            }
          }
        
          /**
           * @dev Only fall back when the sender is not the admin.
           */
          function _willFallback() internal {
            require(msg.sender != _admin(), "Cannot call fallback function from the proxy admin");
            super._willFallback();
          }
        }
        
        // File: @openzeppelin/upgrades/contracts/upgradeability/AdminUpgradeabilityProxy.sol
        
        pragma solidity ^0.5.0;
        
        
        /**
         * @title AdminUpgradeabilityProxy
         * @dev Extends from BaseAdminUpgradeabilityProxy with a constructor for 
         * initializing the implementation, admin, and init data.
         */
        contract AdminUpgradeabilityProxy is BaseAdminUpgradeabilityProxy, UpgradeabilityProxy {
          /**
           * Contract constructor.
           * @param _logic address of the initial implementation.
           * @param _admin Address of the proxy administrator.
           * @param _data Data to send as msg.data to the implementation to initialize the proxied contract.
           * It should include the signature and the parameters of the function to be called, as described in
           * https://solidity.readthedocs.io/en/v0.4.24/abi-spec.html#function-selector-and-argument-encoding.
           * This parameter is optional, if no data is given the initialization call to proxied contract will be skipped.
           */
          constructor(address _logic, address _admin, bytes memory _data) UpgradeabilityProxy(_logic, _data) public payable {
            assert(ADMIN_SLOT == bytes32(uint256(keccak256('eip1967.proxy.admin')) - 1));
            _setAdmin(_admin);
          }
        }

        File 2 of 3: ETGFinance
        /**
         *Submitted for verification at Etherscan.io on 2020-09-04
        */
        
        pragma solidity ^0.5.0;
        
        // ----------------------------------------------------------------------------
        // ERC Token Standard #20 Interface
        //
        // ----------------------------------------------------------------------------
        contract ERC20Interface {
            function totalSupply() public view returns (uint);
            function balanceOf(address tokenOwner) public view returns (uint balance);
            function allowance(address tokenOwner, address spender) public view returns (uint remaining);
            function transfer(address to, uint tokens) public returns (bool success);
            function approve(address spender, uint tokens) public returns (bool success);
            function transferFrom(address from, address to, uint tokens) public returns (bool success);
        
            event Transfer(address indexed from, address indexed to, uint tokens);
            event Approval(address indexed tokenOwner, address indexed spender, uint tokens);
        }
        
        // ----------------------------------------------------------------------------
        // Safe Math Library 
        // ----------------------------------------------------------------------------
        contract SafeMath {
            function safeAdd(uint a, uint b) public pure returns (uint c) {
                c = a + b;
                require(c >= a);
            }
            function safeSub(uint a, uint b) public pure returns (uint c) {
                require(b <= a); c = a - b; } function safeMul(uint a, uint b) public pure returns (uint c) { c = a * b; require(a == 0 || c / a == b); } function safeDiv(uint a, uint b) public pure returns (uint c) { require(b > 0);
                c = a / b;
            }
        }
        
        
        contract ETGFinance is ERC20Interface, SafeMath {
            string public name;
            string public symbol;
            uint8 public decimals; // 18 decimals is the strongly suggested default, avoid changing it
            
            uint256 public _totalSupply;
            
            mapping(address => uint) balances;
            mapping(address => mapping(address => uint)) allowed;
            
            /**
             * Constrctor function
             *
             * Initializes contract with initial supply tokens to the creator of the contract
             */
            constructor() public {
                name = "ETG Finance";
                symbol = "ETGF";
                decimals = 18;
                _totalSupply = 150000000000000000000000;
                
                balances[msg.sender] = _totalSupply;
                emit Transfer(address(0), msg.sender, _totalSupply);
            }
            
            function totalSupply() public view returns (uint) {
                return _totalSupply  - balances[address(0)];
            }
            
            function balanceOf(address tokenOwner) public view returns (uint balance) {
                return balances[tokenOwner];
            }
            
            function allowance(address tokenOwner, address spender) public view returns (uint remaining) {
                return allowed[tokenOwner][spender];
            }
            
            function approve(address spender, uint tokens) public returns (bool success) {
                allowed[msg.sender][spender] = tokens;
                emit Approval(msg.sender, spender, tokens);
                return true;
            }
            
            function transfer(address to, uint tokens) public returns (bool success) {
                balances[msg.sender] = safeSub(balances[msg.sender], tokens);
                balances[to] = safeAdd(balances[to], tokens);
                emit Transfer(msg.sender, to, tokens);
                return true;
            }
            
            function transferFrom(address from, address to, uint tokens) public returns (bool success) {
                balances[from] = safeSub(balances[from], tokens);
                allowed[from][msg.sender] = safeSub(allowed[from][msg.sender], tokens);
                balances[to] = safeAdd(balances[to], tokens);
                emit Transfer(from, to, tokens);
                return true;
            }
        }

        File 3 of 3: AdminUpgradeabilityProxy
        // File: @openzeppelin/upgrades/contracts/upgradeability/Proxy.sol
        
        pragma solidity ^0.5.0;
        
        /**
         * @title Proxy
         * @dev Implements delegation of calls to other contracts, with proper
         * forwarding of return values and bubbling of failures.
         * It defines a fallback function that delegates all calls to the address
         * returned by the abstract _implementation() internal function.
         */
        contract Proxy {
          /**
           * @dev Fallback function.
           * Implemented entirely in `_fallback`.
           */
          function () payable external {
            _fallback();
          }
        
          /**
           * @return The Address of the implementation.
           */
          function _implementation() internal view returns (address);
        
          /**
           * @dev Delegates execution to an implementation contract.
           * This is a low level function that doesn't return to its internal call site.
           * It will return to the external caller whatever the implementation returns.
           * @param implementation Address to delegate.
           */
          function _delegate(address implementation) internal {
            assembly {
              // Copy msg.data. We take full control of memory in this inline assembly
              // block because it will not return to Solidity code. We overwrite the
              // Solidity scratch pad at memory position 0.
              calldatacopy(0, 0, calldatasize)
        
              // Call the implementation.
              // out and outsize are 0 because we don't know the size yet.
              let result := delegatecall(gas, implementation, 0, calldatasize, 0, 0)
        
              // Copy the returned data.
              returndatacopy(0, 0, returndatasize)
        
              switch result
              // delegatecall returns 0 on error.
              case 0 { revert(0, returndatasize) }
              default { return(0, returndatasize) }
            }
          }
        
          /**
           * @dev Function that is run as the first thing in the fallback function.
           * Can be redefined in derived contracts to add functionality.
           * Redefinitions must call super._willFallback().
           */
          function _willFallback() internal {
          }
        
          /**
           * @dev fallback implementation.
           * Extracted to enable manual triggering.
           */
          function _fallback() internal {
            _willFallback();
            _delegate(_implementation());
          }
        }
        
        // File: @openzeppelin/upgrades/contracts/utils/Address.sol
        
        pragma solidity ^0.5.0;
        
        /**
         * Utility library of inline functions on addresses
         *
         * Source https://raw.githubusercontent.com/OpenZeppelin/openzeppelin-solidity/v2.1.3/contracts/utils/Address.sol
         * This contract is copied here and renamed from the original to avoid clashes in the compiled artifacts
         * when the user imports a zos-lib contract (that transitively causes this contract to be compiled and added to the
         * build/artifacts folder) as well as the vanilla Address implementation from an openzeppelin version.
         */
        library OpenZeppelinUpgradesAddress {
            /**
             * Returns whether the target address is a contract
             * @dev This function will return false if invoked during the constructor of a contract,
             * as the code is not actually created until after the constructor finishes.
             * @param account address of the account to check
             * @return whether the target address is a contract
             */
            function isContract(address account) internal view returns (bool) {
                uint256 size;
                // XXX Currently there is no better way to check if there is a contract in an address
                // than to check the size of the code at that address.
                // See https://ethereum.stackexchange.com/a/14016/36603
                // for more details about how this works.
                // TODO Check this again before the Serenity release, because all addresses will be
                // contracts then.
                // solhint-disable-next-line no-inline-assembly
                assembly { size := extcodesize(account) }
                return size > 0;
            }
        }
        
        // File: @openzeppelin/upgrades/contracts/upgradeability/BaseUpgradeabilityProxy.sol
        
        pragma solidity ^0.5.0;
        
        
        
        /**
         * @title BaseUpgradeabilityProxy
         * @dev This contract implements a proxy that allows to change the
         * implementation address to which it will delegate.
         * Such a change is called an implementation upgrade.
         */
        contract BaseUpgradeabilityProxy is Proxy {
          /**
           * @dev Emitted when the implementation is upgraded.
           * @param implementation Address of the new implementation.
           */
          event Upgraded(address indexed implementation);
        
          /**
           * @dev Storage slot with the address of the current implementation.
           * This is the keccak-256 hash of "eip1967.proxy.implementation" subtracted by 1, and is
           * validated in the constructor.
           */
          bytes32 internal constant IMPLEMENTATION_SLOT = 0x360894a13ba1a3210667c828492db98dca3e2076cc3735a920a3ca505d382bbc;
        
          /**
           * @dev Returns the current implementation.
           * @return Address of the current implementation
           */
          function _implementation() internal view returns (address impl) {
            bytes32 slot = IMPLEMENTATION_SLOT;
            assembly {
              impl := sload(slot)
            }
          }
        
          /**
           * @dev Upgrades the proxy to a new implementation.
           * @param newImplementation Address of the new implementation.
           */
          function _upgradeTo(address newImplementation) internal {
            _setImplementation(newImplementation);
            emit Upgraded(newImplementation);
          }
        
          /**
           * @dev Sets the implementation address of the proxy.
           * @param newImplementation Address of the new implementation.
           */
          function _setImplementation(address newImplementation) internal {
            require(OpenZeppelinUpgradesAddress.isContract(newImplementation), "Cannot set a proxy implementation to a non-contract address");
        
            bytes32 slot = IMPLEMENTATION_SLOT;
        
            assembly {
              sstore(slot, newImplementation)
            }
          }
        }
        
        // File: @openzeppelin/upgrades/contracts/upgradeability/UpgradeabilityProxy.sol
        
        pragma solidity ^0.5.0;
        
        
        /**
         * @title UpgradeabilityProxy
         * @dev Extends BaseUpgradeabilityProxy with a constructor for initializing
         * implementation and init data.
         */
        contract UpgradeabilityProxy is BaseUpgradeabilityProxy {
          /**
           * @dev Contract constructor.
           * @param _logic Address of the initial implementation.
           * @param _data Data to send as msg.data to the implementation to initialize the proxied contract.
           * It should include the signature and the parameters of the function to be called, as described in
           * https://solidity.readthedocs.io/en/v0.4.24/abi-spec.html#function-selector-and-argument-encoding.
           * This parameter is optional, if no data is given the initialization call to proxied contract will be skipped.
           */
          constructor(address _logic, bytes memory _data) public payable {
            assert(IMPLEMENTATION_SLOT == bytes32(uint256(keccak256('eip1967.proxy.implementation')) - 1));
            _setImplementation(_logic);
            if(_data.length > 0) {
              (bool success,) = _logic.delegatecall(_data);
              require(success);
            }
          }  
        }
        
        // File: @openzeppelin/upgrades/contracts/upgradeability/BaseAdminUpgradeabilityProxy.sol
        
        pragma solidity ^0.5.0;
        
        
        /**
         * @title BaseAdminUpgradeabilityProxy
         * @dev This contract combines an upgradeability proxy with an authorization
         * mechanism for administrative tasks.
         * All external functions in this contract must be guarded by the
         * `ifAdmin` modifier. See ethereum/solidity#3864 for a Solidity
         * feature proposal that would enable this to be done automatically.
         */
        contract BaseAdminUpgradeabilityProxy is BaseUpgradeabilityProxy {
          /**
           * @dev Emitted when the administration has been transferred.
           * @param previousAdmin Address of the previous admin.
           * @param newAdmin Address of the new admin.
           */
          event AdminChanged(address previousAdmin, address newAdmin);
        
          /**
           * @dev Storage slot with the admin of the contract.
           * This is the keccak-256 hash of "eip1967.proxy.admin" subtracted by 1, and is
           * validated in the constructor.
           */
        
          bytes32 internal constant ADMIN_SLOT = 0xb53127684a568b3173ae13b9f8a6016e243e63b6e8ee1178d6a717850b5d6103;
        
          /**
           * @dev Modifier to check whether the `msg.sender` is the admin.
           * If it is, it will run the function. Otherwise, it will delegate the call
           * to the implementation.
           */
          modifier ifAdmin() {
            if (msg.sender == _admin()) {
              _;
            } else {
              _fallback();
            }
          }
        
          /**
           * @return The address of the proxy admin.
           */
          function admin() external ifAdmin returns (address) {
            return _admin();
          }
        
          /**
           * @return The address of the implementation.
           */
          function implementation() external ifAdmin returns (address) {
            return _implementation();
          }
        
          /**
           * @dev Changes the admin of the proxy.
           * Only the current admin can call this function.
           * @param newAdmin Address to transfer proxy administration to.
           */
          function changeAdmin(address newAdmin) external ifAdmin {
            require(newAdmin != address(0), "Cannot change the admin of a proxy to the zero address");
            emit AdminChanged(_admin(), newAdmin);
            _setAdmin(newAdmin);
          }
        
          /**
           * @dev Upgrade the backing implementation of the proxy.
           * Only the admin can call this function.
           * @param newImplementation Address of the new implementation.
           */
          function upgradeTo(address newImplementation) external ifAdmin {
            _upgradeTo(newImplementation);
          }
        
          /**
           * @dev Upgrade the backing implementation of the proxy and call a function
           * on the new implementation.
           * This is useful to initialize the proxied contract.
           * @param newImplementation Address of the new implementation.
           * @param data Data to send as msg.data in the low level call.
           * It should include the signature and the parameters of the function to be called, as described in
           * https://solidity.readthedocs.io/en/v0.4.24/abi-spec.html#function-selector-and-argument-encoding.
           */
          function upgradeToAndCall(address newImplementation, bytes calldata data) payable external ifAdmin {
            _upgradeTo(newImplementation);
            (bool success,) = newImplementation.delegatecall(data);
            require(success);
          }
        
          /**
           * @return The admin slot.
           */
          function _admin() internal view returns (address adm) {
            bytes32 slot = ADMIN_SLOT;
            assembly {
              adm := sload(slot)
            }
          }
        
          /**
           * @dev Sets the address of the proxy admin.
           * @param newAdmin Address of the new proxy admin.
           */
          function _setAdmin(address newAdmin) internal {
            bytes32 slot = ADMIN_SLOT;
        
            assembly {
              sstore(slot, newAdmin)
            }
          }
        
          /**
           * @dev Only fall back when the sender is not the admin.
           */
          function _willFallback() internal {
            require(msg.sender != _admin(), "Cannot call fallback function from the proxy admin");
            super._willFallback();
          }
        }
        
        // File: @openzeppelin/upgrades/contracts/upgradeability/AdminUpgradeabilityProxy.sol
        
        pragma solidity ^0.5.0;
        
        
        /**
         * @title AdminUpgradeabilityProxy
         * @dev Extends from BaseAdminUpgradeabilityProxy with a constructor for 
         * initializing the implementation, admin, and init data.
         */
        contract AdminUpgradeabilityProxy is BaseAdminUpgradeabilityProxy, UpgradeabilityProxy {
          /**
           * Contract constructor.
           * @param _logic address of the initial implementation.
           * @param _admin Address of the proxy administrator.
           * @param _data Data to send as msg.data to the implementation to initialize the proxied contract.
           * It should include the signature and the parameters of the function to be called, as described in
           * https://solidity.readthedocs.io/en/v0.4.24/abi-spec.html#function-selector-and-argument-encoding.
           * This parameter is optional, if no data is given the initialization call to proxied contract will be skipped.
           */
          constructor(address _logic, address _admin, bytes memory _data) UpgradeabilityProxy(_logic, _data) public payable {
            assert(ADMIN_SLOT == bytes32(uint256(keccak256('eip1967.proxy.admin')) - 1));
            _setAdmin(_admin);
          }
        }