// Sources flattened with hardhat v2.12.4 https://hardhat.org
// File contracts/upgradability/UUPSUtils.sol
// SPDX-License-Identifier: AGPLv3
pragma solidity 0.8.16;
/**
* @title UUPS (Universal Upgradeable Proxy Standard) Shared Library
*/
library UUPSUtils {
/**
* @dev Implementation slot constant.
* Using https://eips.ethereum.org/EIPS/eip-1967 standard
* Storage slot 0x360894a13ba1a3210667c828492db98dca3e2076cc3735a920a3ca505d382bbc
* (obtained as bytes32(uint256(keccak256('eip1967.proxy.implementation')) - 1)).
*/
bytes32 internal constant _IMPLEMENTATION_SLOT =
0x360894a13ba1a3210667c828492db98dca3e2076cc3735a920a3ca505d382bbc;
/// @dev Get implementation address.
function implementation() internal view returns (address impl) {
assembly {
// solium-disable-line
impl := sload(_IMPLEMENTATION_SLOT)
}
}
/// @dev Set new implementation address.
function setImplementation(address codeAddress) internal {
assembly {
// solium-disable-line
sstore(_IMPLEMENTATION_SLOT, codeAddress)
}
}
}
// File @openzeppelin/contracts/proxy/Proxy.sol@v4.8.0
/**
* @dev This abstract contract provides a fallback function that delegates all calls to another contract using the EVM
* instruction `delegatecall`. We refer to the second contract as the _implementation_ behind the proxy, and it has to
* be specified by overriding the virtual {_implementation} function.
*
* Additionally, delegation to the implementation can be triggered manually through the {_fallback} function, or to a
* different contract through the {_delegate} function.
*
* The success and return data of the delegated call will be returned back to the caller of the proxy.
*/
abstract contract Proxy {
/**
* @dev Delegates the current call to `implementation`.
*
* This function does not return to its internal call site, it will return directly to the external caller.
*/
function _delegate(address implementation) internal virtual {
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 This is a virtual function that should be overridden so it returns the address to which the fallback function
* and {_fallback} should delegate.
*/
function _implementation() internal view virtual returns (address);
/**
* @dev Delegates the current call to the address returned by `_implementation()`.
*
* This function does not return to its internal call site, it will return directly to the external caller.
*/
function _fallback() internal virtual {
_beforeFallback();
_delegate(_implementation());
}
/**
* @dev Fallback function that delegates calls to the address returned by `_implementation()`. Will run if no other
* function in the contract matches the call data.
*/
fallback() external payable virtual {
_fallback();
}
/**
* @dev Fallback function that delegates calls to the address returned by `_implementation()`. Will run if call data
* is empty.
*/
receive() external payable virtual {
_fallback();
}
/**
* @dev Hook that is called before falling back to the implementation. Can happen as part of a manual `_fallback`
* call, or as part of the Solidity `fallback` or `receive` functions.
*
* If overridden should call `super._beforeFallback()`.
*/
function _beforeFallback() internal virtual {}
}
// File contracts/upgradability/UUPSProxy.sol
/**
* @title UUPS (Universal Upgradeable Proxy Standard) Proxy
*
* NOTE:
* - Compliant with [Universal Upgradeable Proxy Standard](https://eips.ethereum.org/EIPS/eip-1822)
* - Compiiant with [Standard Proxy Storage Slots](https://eips.ethereum.org/EIPS/eip-1967)
* - 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 implementation.
*/
contract UUPSProxy is Proxy {
/**
* @dev Proxy initialization function.
* This should only be called once and it is permission-less.
* @param initialAddress Initial logic contract code address to be used.
*/
function initializeProxy(address initialAddress) external {
require(initialAddress != address(0), "UUPSProxy: zero address");
require(
UUPSUtils.implementation() == address(0),
"UUPSProxy: already initialized"
);
UUPSUtils.setImplementation(initialAddress);
}
/// @dev Proxy._implementation implementation
function _implementation() internal view virtual override returns (address) {
return UUPSUtils.implementation();
}
}
{
"compilationTarget": {
"project:/contracts/token/superfluid/UUPSProxy.sol": "UUPSProxy"
},
"evmVersion": "london",
"libraries": {},
"metadata": {
"bytecodeHash": "ipfs"
},
"optimizer": {
"enabled": true,
"runs": 0
},
"remappings": []
}
[{"stateMutability":"payable","type":"fallback"},{"inputs":[{"internalType":"address","name":"initialAddress","type":"address"}],"name":"initializeProxy","outputs":[],"stateMutability":"nonpayable","type":"function"},{"stateMutability":"payable","type":"receive"}]