Overview
Max Total Supply
300,000,000 OKB
Holders
17,059 ( 0.029%)
Market
Price
$37.72 @ 0.014358 ETH (+0.87%)
Onchain Market Cap
$11,316,000,000.00
Circulating Supply Market Cap
$2,263,015,043.00
Other Info
Token Contract (WITH 18 Decimals)
Balance
0.015241876855002609 OKBValue
$0.57 ( ~0.000216970819590695 Eth) [0.0000%]Loading...
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# | Exchange | Pair | Price | 24H Volume | % Volume |
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Contract Name:
OwnedUpgradeabilityProxy
Compiler Version
v0.4.24+commit.e67f0147
Contract Source Code (Solidity Multiple files format)
pragma solidity ^0.4.24; import './UpgradeabilityProxy.sol'; /** * @title OwnedUpgradeabilityProxy * @dev This contract combines an upgradeability proxy with basic authorization control functionalities */ contract OwnedUpgradeabilityProxy is UpgradeabilityProxy { /** * @dev Event to show ownership has been transferred * @param previousOwner representing the address of the previous owner * @param newOwner representing the address of the new owner */ event ProxyOwnershipTransferred(address previousOwner, address newOwner); // Storage position of the owner of the contract bytes32 private constant proxyOwnerPosition = keccak256("org.zeppelinos.proxy.owner"); /** * @dev the constructor sets the original owner of the contract to the sender account. */ constructor() public { setUpgradeabilityOwner(msg.sender); } /** * @dev Throws if called by any account other than the owner. */ modifier onlyProxyOwner() { require(msg.sender == proxyOwner()); _; } /** * @dev Tells the address of the owner * @return the address of the owner */ function proxyOwner() public view returns (address owner) { bytes32 position = proxyOwnerPosition; assembly { owner := sload(position) } } /** * @dev Sets the address of the owner */ function setUpgradeabilityOwner(address newProxyOwner) internal { bytes32 position = proxyOwnerPosition; assembly { sstore(position, newProxyOwner) } } /** * @dev Allows the current owner to transfer control of the contract to a newOwner. * @param newOwner The address to transfer ownership to. */ function transferProxyOwnership(address newOwner) public onlyProxyOwner { require(newOwner != address(0)); emit ProxyOwnershipTransferred(proxyOwner(), newOwner); setUpgradeabilityOwner(newOwner); } /** * @dev Allows the proxy owner to upgrade the current version of the proxy. * @param implementation representing the address of the new implementation to be set. */ function upgradeTo(address implementation) public onlyProxyOwner { _upgradeTo(implementation); } /** * @dev Allows the proxy owner to upgrade the current version of the proxy and call the new implementation * to initialize whatever is needed through a low level call. * @param implementation representing the address of the new implementation to be set. * @param data represents the msg.data to bet sent in the low level call. This parameter may include the function * signature of the implementation to be called with the needed payload */ function upgradeToAndCall(address implementation, bytes data) payable public onlyProxyOwner { upgradeTo(implementation); require(implementation.delegatecall(data)); } }
pragma solidity ^0.4.24; library Address { /** * 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; } }
pragma solidity ^0.4.24; /** * @title Proxy * @dev Gives the possibility to delegate any call to a foreign implementation. */ contract Proxy { /** * @dev Tells the address of the implementation where every call will be delegated. * @return address of the implementation to which it will be delegated */ function implementation() public view returns (address); /** * @dev Fallback function allowing to perform a delegatecall to the given implementation. * This function will return whatever the implementation call returns */ function () payable public { address _impl = implementation(); require(_impl != address(0)); assembly { let ptr := mload(0x40) calldatacopy(ptr, 0, calldatasize) let result := delegatecall(gas, _impl, ptr, calldatasize, 0, 0) let size := returndatasize returndatacopy(ptr, 0, size) switch result case 0 { revert(ptr, size) } default { return(ptr, size) } } } }
pragma solidity ^0.4.24; import './Proxy.sol'; import './Address.sol'; /** * @title UpgradeabilityProxy * @dev This contract represents a proxy where the implementation address to which it will delegate can be upgraded */ contract UpgradeabilityProxy is Proxy { /** * @dev This event will be emitted every time the implementation gets upgraded * @param implementation representing the address of the upgraded implementation */ event Upgraded(address indexed implementation); // Storage position of the address of the current implementation bytes32 private constant implementationPosition = keccak256("org.zeppelinos.proxy.implementation"); /** * @dev Constructor function */ constructor() public {} /** * @dev Tells the address of the current implementation * @return address of the current implementation */ function implementation() public view returns (address impl) { bytes32 position = implementationPosition; assembly { impl := sload(position) } } /** * @dev Sets the address of the current implementation * @param newImplementation address representing the new implementation to be set */ function setImplementation(address newImplementation) internal { require(Address.isContract(newImplementation),"newImplementation is not a contractAddress"); bytes32 position = implementationPosition; assembly { sstore(position, newImplementation) } } /** * @dev Upgrades the implementation address * @param newImplementation representing the address of the new implementation to be set */ function _upgradeTo(address newImplementation) internal { address currentImplementation = implementation(); require(currentImplementation != newImplementation); setImplementation(newImplementation); emit Upgraded(newImplementation); } }
Contract Security Audit
- No Contract Security Audit Submitted- Submit Audit Here
[{"constant":true,"inputs":[],"name":"proxyOwner","outputs":[{"name":"owner","type":"address"}],"payable":false,"stateMutability":"view","type":"function"},{"constant":false,"inputs":[{"name":"implementation","type":"address"}],"name":"upgradeTo","outputs":[],"payable":false,"stateMutability":"nonpayable","type":"function"},{"constant":false,"inputs":[{"name":"implementation","type":"address"},{"name":"data","type":"bytes"}],"name":"upgradeToAndCall","outputs":[],"payable":true,"stateMutability":"payable","type":"function"},{"constant":true,"inputs":[],"name":"implementation","outputs":[{"name":"impl","type":"address"}],"payable":false,"stateMutability":"view","type":"function"},{"constant":false,"inputs":[{"name":"newOwner","type":"address"}],"name":"transferProxyOwnership","outputs":[],"payable":false,"stateMutability":"nonpayable","type":"function"},{"inputs":[],"payable":false,"stateMutability":"nonpayable","type":"constructor"},{"payable":true,"stateMutability":"payable","type":"fallback"},{"anonymous":false,"inputs":[{"indexed":false,"name":"previousOwner","type":"address"},{"indexed":false,"name":"newOwner","type":"address"}],"name":"ProxyOwnershipTransferred","type":"event"},{"anonymous":false,"inputs":[{"indexed":true,"name":"implementation","type":"address"}],"name":"Upgraded","type":"event"}]
Contract Creation Code
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Deployed Bytecode Sourcemap
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Swarm Source
bzzr://b21827233f9d2bef4fe7ba531d23ab64a9325b87e4f66551d34e9fa11786d84b
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