checkDiff validates Etherscan source code

validate/FiatTokenProxy.etherscan

@@ -0,0 +1,329 @@
+pragma solidity ^0.4.24;
+
+// File: zos-lib/contracts/upgradeability/Proxy.sol
+
+/**
+ * @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-solidity/contracts/AddressUtils.sol
+
+/**
+ * Utility library of inline functions on addresses
+ */
+library AddressUtils {
+
+  /**
+   * 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 addr address to check
+   * @return whether the target address is a contract
+   */
+  function isContract(address addr) 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.
+    // solium-disable-next-line security/no-inline-assembly
+    assembly { size := extcodesize(addr) }
+    return size > 0;
+  }
+
+}
+
+// File: zos-lib/contracts/upgradeability/UpgradeabilityProxy.sol
+
+/**
+ * @title UpgradeabilityProxy
+ * @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 UpgradeabilityProxy is Proxy {
+  /**
+   * @dev Emitted when the implementation is upgraded.
+   * @param implementation Address of the new implementation.
+   */
+  event Upgraded(address implementation);
+
+  /**
+   * @dev Storage slot with the address of the current implementation.
+   * This is the keccak-256 hash of "org.zeppelinos.proxy.implementation", and is
+   * validated in the constructor.
+   */
+  bytes32 private constant IMPLEMENTATION_SLOT = 0x7050c9e0f4ca769c69bd3a8ef740bc37934f8e2c036e5a723fd8ee048ed3f8c3;
+
+  /**
+   * @dev Contract constructor.
+   * @param _implementation Address of the initial implementation.
+   */
+  constructor(address _implementation) public {
+    assert(IMPLEMENTATION_SLOT == keccak256("org.zeppelinos.proxy.implementation"));
+
+    _setImplementation(_implementation);
+  }
+
+  /**
+   * @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) private {
+    require(AddressUtils.isContract(newImplementation), "Cannot set a proxy implementation to a non-contract address");
+
+    bytes32 slot = IMPLEMENTATION_SLOT;
+
+    assembly {
+      sstore(slot, newImplementation)
+    }
+  }
+}
+
+// File: zos-lib/contracts/upgradeability/AdminUpgradeabilityProxy.sol
+
+/**
+ * @title AdminUpgradeabilityProxy
+ * @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 AdminUpgradeabilityProxy is UpgradeabilityProxy {
+  /**
+   * @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 "org.zeppelinos.proxy.admin", and is
+   * validated in the constructor.
+   */
+  bytes32 private constant ADMIN_SLOT = 0x10d6a54a4754c8869d6886b5f5d7fbfa5b4522237ea5c60d11bc4e7a1ff9390b;
+
+  /**
+   * @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();
+    }
+  }
+
+  /**
+   * Contract constructor.
+   * It sets the `msg.sender` as the proxy administrator.
+   * @param _implementation address of the initial implementation.
+   */
+  constructor(address _implementation) UpgradeabilityProxy(_implementation) public {
+    assert(ADMIN_SLOT == keccak256("org.zeppelinos.proxy.admin"));
+
+    _setAdmin(msg.sender);
+  }
+
+  /**
+   * @return The address of the proxy admin.
+   */
+  function admin() external view ifAdmin returns (address) {
+    return _admin();
+  }
+
+  /**
+   * @return The address of the implementation.
+   */
+  function implementation() external view 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/develop/abi-spec.html#function-selector-and-argument-encoding.
+   */
+  function upgradeToAndCall(address newImplementation, bytes data) payable external ifAdmin {
+    _upgradeTo(newImplementation);
+    require(address(this).call.value(msg.value)(data));
+  }
+
+  /**
+   * @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: contracts/FiatTokenProxy.sol
+
+/**
+* Copyright CENTRE SECZ 2018
+*
+* Permission is hereby granted, free of charge, to any person obtaining a copy
+* of this software and associated documentation files (the "Software"), to deal
+* in the Software without restriction, including without limitation the rights
+* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+* copies of the Software, and to permit persons to whom the Software is furnished to
+* do so, subject to the following conditions:
+*
+* The above copyright notice and this permission notice shall be included in all
+* copies or substantial portions of the Software.
+*
+* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,
+* WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
+* CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
+*/
+
+pragma solidity ^0.4.24;
+
+
+/**
+ * @title FiatTokenProxy
+ * @dev This contract proxies FiatToken calls and enables FiatToken upgrades
+*/
+contract FiatTokenProxy is AdminUpgradeabilityProxy {
+    constructor(address _implementation) public AdminUpgradeabilityProxy(_implementation) {
+    }
+}