Code for 0x19d9…fc28
Since block 11380871
Verified contract
// SPDX-License-Identifier: MIT
pragma solidity ^0.6.2;
/**
* @dev Collection of functions related to the address type
*/
library Address {
/**
* @dev Returns true if `account` is a contract.
*
* [IMPORTANT]
* ====
* It is unsafe to assume that an address for which this function returns
* false is an externally-owned account (EOA) and not a contract.
*
* Among others, `isContract` will return false for the following
* types of addresses:
*
* - an externally-owned account
* - a contract in construction
* - an address where a contract will be created
* - an address where a contract lived, but was destroyed
* ====
*/
function isContract(address account) internal view returns (bool) {
// This method relies on extcodesize, which returns 0 for contracts in
// construction, since the code is only stored at the end of the
// constructor execution.
uint256 size;
// solhint-disable-next-line no-inline-assembly
assembly { size := extcodesize(account) }
return size > 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.
*/
abstract contract Proxy {
/**
* @dev Fallback function.
* Implemented entirely in `_fallback`.
*/
fallback () payable external {
_fallback();
}
/**
* @dev Receive function.
* Implemented entirely in `_fallback`.
*/
receive () payable external {
_fallback();
}
/**
* @return The Address of the implementation.
*/
function _implementation() internal virtual 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 virtual {
}
/**
* @dev fallback implementation.
* Extracted to enable manual triggering.
*/
function _fallback() internal {
_willFallback();
_delegate(_implementation());
}
}
/**
* @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 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);
}
}
/**
* @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 impl Address of the current implementation
*/
function _implementation() internal override 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(Address.isContract(newImplementation), "Cannot set a proxy implementation to a non-contract address");
bytes32 slot = IMPLEMENTATION_SLOT;
assembly {
sstore(slot, newImplementation)
}
}
}
/**
* @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 {
/**
* 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);
}
/**
* @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 adm 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 override virtual {
require(msg.sender != _admin(), "Cannot call fallback function from the proxy admin");
super._willFallback();
}
}
Contract sourced from Etherscan. Solidity version v0.6.8+commit.0bbfe453.
Panoramix decompilation
# Palkeoramix decompiler. def storage: stor3608 is uint128 at storage 0x360894a13ba1a3210667c828492db98dca3e2076cc3735a920a3ca505d382bbc offset 160 stor3608 is address at storage 0x360894a13ba1a3210667c828492db98dca3e2076cc3735a920a3ca505d382bbc stor3608 is uint256 at storage 0x360894a13ba1a3210667c828492db98dca3e2076cc3735a920a3ca505d382bbc storB531 is uint128 at storage 0xb53127684a568b3173ae13b9f8a6016e243e63b6e8ee1178d6a717850b5d6103 offset 160 storB531 is address at storage 0xb53127684a568b3173ae13b9f8a6016e243e63b6e8ee1178d6a717850b5d6103 def admin(): # not payable if caller == address(storB531.field_0): return address(storB531.field_0) delegate uint256(stor3608.field_0) with: funct call.data[0 len 4] gas gas_remaining wei args call.data[4 len calldata.size - 4] if not delegate.return_code: revert with ext_call.return_data[0 len return_data.size] return ext_call.return_data[0 len return_data.size] def implementation(): # not payable if caller == address(storB531.field_0): return address(stor3608.field_0) delegate uint256(stor3608.field_0) with: funct call.data[0 len 4] gas gas_remaining wei args call.data[4 len calldata.size - 4] if not delegate.return_code: revert with ext_call.return_data[0 len return_data.size] return ext_call.return_data[0 len return_data.size] def _fallback(?) payable: # default function if caller == address(storB531.field_0): revert with 0x8c379a000000000000000000000000000000000000000000000000000000000, 32, 50, 0xfe43616e6e6f742063616c6c2066616c6c6261636b2066756e6374696f6e2066726f6d207468652070726f78792061646d69, mem[214 len 14] delegate uint256(stor3608.field_0) with: funct call.data[0 len 4] gas gas_remaining wei args call.data[4 len calldata.size - 4] if not delegate.return_code: revert with ext_call.return_data[0 len return_data.size] return ext_call.return_data[0 len return_data.size] def upgradeTo(address newImplementation): # not payable require calldata.size - 4 >= 32 if address(storB531.field_0) != caller: delegate uint256(stor3608.field_0) with: funct call.data[0 len 4] gas gas_remaining wei args call.data[4 len calldata.size - 4] if not delegate.return_code: revert with ext_call.return_data[0 len return_data.size] return ext_call.return_data[0 len return_data.size] if ext_code.size(newImplementation) <= 0: revert with 0x8c379a000000000000000000000000000000000000000000000000000000000, 32, 59, 0x7343616e6e6f742073657420612070726f787920696d706c656d656e746174696f6e20746f2061206e6f6e2d636f6e747261637420616464726573, mem[223 len 5] address(stor3608.field_0) = newImplementation Mask(96, 0, stor3608.field_160) = 0 log Upgraded(address implementation=newImplementation) def changeAdmin(address newAdmin): # not payable require calldata.size - 4 >= 32 if address(storB531.field_0) != caller: delegate uint256(stor3608.field_0) with: funct call.data[0 len 4] gas gas_remaining wei args call.data[4 len calldata.size - 4] if not delegate.return_code: revert with ext_call.return_data[0 len return_data.size] return ext_call.return_data[0 len return_data.size] if not newAdmin: revert with 0x8c379a000000000000000000000000000000000000000000000000000000000, 32, 54, 0x6e43616e6e6f74206368616e6765207468652061646d696e206f6620612070726f787920746f20746865207a65726f20616464726573, mem[218 len 10] log AdminChanged( address previousAdmin=address(storB531.field_0), address newAdmin=newAdmin) address(storB531.field_0) = newAdmin Mask(96, 0, storB531.field_160) = 0 def upgradeToAndCall(address newImplementation, bytes data) payable: require calldata.size - 4 >= 64 require data <= unknown10000000() require data + 36 <= calldata.size require data.length <= unknown10000000() and data + data.length + 36 <= calldata.size if address(storB531.field_0) != caller: delegate uint256(stor3608.field_0) with: funct call.data[0 len 4] gas gas_remaining wei args call.data[4 len calldata.size - 4] if not delegate.return_code: revert with ext_call.return_data[0 len return_data.size] return ext_call.return_data[0 len return_data.size] if ext_code.size(newImplementation) <= 0: revert with 0x8c379a000000000000000000000000000000000000000000000000000000000, 32, 59, 0x7343616e6e6f742073657420612070726f787920696d706c656d656e746174696f6e20746f2061206e6f6e2d636f6e747261637420616464726573, mem[223 len 5] address(stor3608.field_0) = newImplementation Mask(96, 0, stor3608.field_160) = 0 log Upgraded(address implementation=newImplementation) delegate newImplementation with: gas gas_remaining wei args data[all] require delegate.return_code
Decompilation generated by Panoramix.
Raw bytecode
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