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ERC20PredicateProxy
- Verified
- Polygon (Matic)
- Bridge
- Proxy
Verified
This contract is a proxy and the implementation details are not yet known.
0x40ec5b33f54e0e8a33a975908c5ba1c14e5bbbdf
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// File: contracts/common/Proxy/IERCProxy.sol
pragma solidity 0.6.6;
interface IERCProxy {
function proxyType() external pure returns (uint256 proxyTypeId);
function implementation() external view returns (address codeAddr);
}
// File: contracts/common/Proxy/Proxy.sol
pragma solidity 0.6.6;
abstract contract Proxy is IERCProxy {
function delegatedFwd(address _dst, bytes memory _calldata) internal {
// solium-disable-next-line security/no-inline-assembly
assembly {
let result := delegatecall(
sub(gas(), 10000),
_dst,
add(_calldata, 0x20),
mload(_calldata),
0,
0
)
let size := returndatasize()
let ptr := mload(0x40)
returndatacopy(ptr, 0, size)
// revert instead of invalid() bc if the underlying call failed with invalid() it already wasted gas.
// if the call returned error data, forward it
switch result
case 0 {
revert(ptr, size)
}
default {
return(ptr, size)
}
}
}
function proxyType() external virtual override pure returns (uint256 proxyTypeId) {
// Upgradeable proxy
proxyTypeId = 2;
}
function implementation() external virtual override view returns (address);
}
// File: contracts/common/Proxy/UpgradableProxy.sol
pragma solidity 0.6.6;
contract UpgradableProxy is Proxy {
event ProxyUpdated(address indexed _new, address indexed _old);
event ProxyOwnerUpdate(address _new, address _old);
bytes32 constant IMPLEMENTATION_SLOT = keccak256("matic.network.proxy.implementation");
bytes32 constant OWNER_SLOT = keccak256("matic.network.proxy.owner");
constructor(address _proxyTo) public {
setProxyOwner(msg.sender);
setImplementation(_proxyTo);
}
fallback() external payable {
delegatedFwd(loadImplementation(), msg.data);
}
receive() external payable {
delegatedFwd(loadImplementation(), msg.data);
}
modifier onlyProxyOwner() {
require(loadProxyOwner() == msg.sender, "NOT_OWNER");
_;
}
function proxyOwner() external view returns(address) {
return loadProxyOwner();
}
function loadProxyOwner() internal view returns(address) {
address _owner;
bytes32 position = OWNER_SLOT;
assembly {
_owner := sload(position)
}
return _owner;
}
function implementation() external override view returns (address) {
return loadImplementation();
}
function loadImplementation() internal view returns(address) {
address _impl;
bytes32 position = IMPLEMENTATION_SLOT;
assembly {
_impl := sload(position)
}
return _impl;
}
function transferProxyOwnership(address newOwner) public onlyProxyOwner {
require(newOwner != address(0), "ZERO_ADDRESS");
emit ProxyOwnerUpdate(newOwner, loadProxyOwner());
setProxyOwner(newOwner);
}
function setProxyOwner(address newOwner) private {
bytes32 position = OWNER_SLOT;
assembly {
sstore(position, newOwner)
}
}
function updateImplementation(address _newProxyTo) public onlyProxyOwner {
require(_newProxyTo != address(0x0), "INVALID_PROXY_ADDRESS");
require(isContract(_newProxyTo), "DESTINATION_ADDRESS_IS_NOT_A_CONTRACT");
emit ProxyUpdated(_newProxyTo, loadImplementation());
setImplementation(_newProxyTo);
}
function updateAndCall(address _newProxyTo, bytes memory data) payable public onlyProxyOwner {
updateImplementation(_newProxyTo);
(bool success, bytes memory returnData) = address(this).call{value: msg.value}(data);
require(success, string(returnData));
}
function setImplementation(address _newProxyTo) private {
bytes32 position = IMPLEMENTATION_SLOT;
assembly {
sstore(position, _newProxyTo)
}
}
function isContract(address _target) internal view returns (bool) {
if (_target == address(0)) {
return false;
}
uint256 size;
assembly {
size := extcodesize(_target)
}
return size > 0;
}
}
// File: contracts/root/TokenPredicates/ERC20PredicateProxy.sol
pragma solidity 0.6.6;
contract ERC20PredicateProxy is UpgradableProxy {
constructor(address _proxyTo)
public
UpgradableProxy(_proxyTo)
{}
}ERC20PredicateProxy ABI
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[{"inputs":[{"internalType":"address","name":"_proxyTo","type":"address"}],"stateMutability":"nonpayable","type":"constructor"},{"anonymous":false,"inputs":[{"indexed":false,"internalType":"address","name":"_new","type":"address"},{"indexed":false,"internalType":"address","name":"_old","type":"address"}],"name":"ProxyOwnerUpdate","type":"event"},{"anonymous":false,"inputs":[{"indexed":true,"internalType":"address","name":"_new","type":"address"},{"indexed":true,"internalType":"address","name":"_old","type":"address"}],"name":"ProxyUpdated","type":"event"},{"stateMutability":"payable","type":"fallback"},{"inputs":[],"name":"implementation","outputs":[{"internalType":"address","name":"","type":"address"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"proxyOwner","outputs":[{"internalType":"address","name":"","type":"address"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"proxyType","outputs":[{"internalType":"uint256","name":"proxyTypeId","type":"uint256"}],"stateMutability":"pure","type":"function"},{"inputs":[{"internalType":"address","name":"newOwner","type":"address"}],"name":"transferProxyOwnership","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"address","name":"_newProxyTo","type":"address"},{"internalType":"bytes","name":"data","type":"bytes"}],"name":"updateAndCall","outputs":[],"stateMutability":"payable","type":"function"},{"inputs":[{"internalType":"address","name":"_newProxyTo","type":"address"}],"name":"updateImplementation","outputs":[],"stateMutability":"nonpayable","type":"function"},{"stateMutability":"payable","type":"receive"}]ERC20PredicateProxy Bytecode
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