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Outline

•  contract Upgradeable *
•    - function authentication()
•    - function implementation()
•    - function upgrade(address _implementat ...
•    - function _setimplementation(address _ ...
•    - function _setauthentication(address _ ...

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/**
 *Submitted for verification at Etherscan.io on 2021-03-25
*/

/**
 *Submitted for verification at Etherscan.io on 2020-11-18
*/

/**
 *Submitted for verification at Etherscan.io on 2020-09-11
*/

pragma solidity >=0.6.0;


contract Upgradeable {
    event Upgrade(
        address indexed sender,
        address indexed from,
        address indexed to
    );

    //https://eips.ethereum.org/EIPS/eip-1967
    //bytes32(uint256(keccak256('eip1967.proxy.implementation')) - 1)
    bytes32
        internal constant IMPLEMENTATION_STORAGE_SLOT = 0x360894a13ba1a3210667c828492db98dca3e2076cc3735a920a3ca505d382bbc;
    bytes32
        internal constant AUTHENTICATION_STORAGE_SLOT = 0xb53127684a568b3173ae13b9f8a6016e243e63b6e8ee1178d6a717850b5d6103;

    constructor(address _authentication, address _implementation) public {
        require(_authentication != address(0), "Upgradeable.constructor.EID00090");
        require(_implementation != address(0), "Upgradeable.constructor.EID00090");
        _setauthentication(_authentication);
        _setimplementation(_implementation);
    }

    modifier auth() {
        require(msg.sender == authentication(), "Upgradeable.auth.EID00001");
        _;
    }

    function authentication() public view returns (address _authentication) {
        bytes32 slot = AUTHENTICATION_STORAGE_SLOT;
        assembly {
            _authentication := sload(slot)
        }
    }

    function implementation() public view returns (address _implementation) {
        bytes32 slot = IMPLEMENTATION_STORAGE_SLOT;
        assembly {
            _implementation := sload(slot)
        }
    }

    function upgrade(address _implementation)
        public
        auth
        returns (address)
    {
        require(_implementation != address(0), "Upgradeable.upgrade.EID00090");
        address from = _setimplementation(_implementation);
        emit Upgrade(msg.sender, from, _implementation);
        return from;
    }

    fallback() external payable {
        address _implementation = implementation();
        assembly {
            calldatacopy(0, 0, calldatasize())
            let result := delegatecall(
                gas(),
                _implementation,
                0,
                calldatasize(),
                0,
                0
            )
            returndatacopy(0, 0, returndatasize())
            switch result
                case 0 {
                    revert(0, returndatasize())
                }
                default {
                    return(0, returndatasize())
                }
        }
    }

    function _setimplementation(address _implementation)
        internal
        returns (address)
    {
        address from = implementation();
        bytes32 slot = IMPLEMENTATION_STORAGE_SLOT;
        assembly {
            sstore(slot, _implementation)
        }
        return from;
    }

    function _setauthentication(address _authentication)
        internal
        returns (address)
    {
        address from = authentication();
        bytes32 slot = AUTHENTICATION_STORAGE_SLOT;
        assembly {
            sstore(slot, _authentication)
        }
        return from;
    }
}

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[{"inputs":[{"internalType":"address","name":"_authentication","type":"address"},{"internalType":"address","name":"_implementation","type":"address"}],"stateMutability":"nonpayable","type":"constructor"},{"anonymous":false,"inputs":[{"indexed":true,"internalType":"address","name":"sender","type":"address"},{"indexed":true,"internalType":"address","name":"from","type":"address"},{"indexed":true,"internalType":"address","name":"to","type":"address"}],"name":"Upgrade","type":"event"},{"stateMutability":"payable","type":"fallback"},{"inputs":[],"name":"authentication","outputs":[{"internalType":"address","name":"_authentication","type":"address"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"implementation","outputs":[{"internalType":"address","name":"_implementation","type":"address"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"address","name":"_implementation","type":"address"}],"name":"upgrade","outputs":[{"internalType":"address","name":"","type":"address"}],"stateMutability":"nonpayable","type":"function"}]

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

000000000000000000000000c9ec0ef264c037795953709e6c2f7ca301a155d100000000000000000000000048c6d852f9fb13dbba1b7d7452d81d4425912abf

-----Decoded View---------------
Arg [0] : _authentication (address): 0xc9ec0Ef264C037795953709e6C2f7ca301A155D1
Arg [1] : _implementation (address): 0x48C6d852F9FB13dBba1b7D7452d81D4425912Abf

-----Encoded View---------------
2 Constructor Arguments found :
Arg [0] : 000000000000000000000000c9ec0ef264c037795953709e6c2f7ca301a155d1
Arg [1] : 00000000000000000000000048c6d852f9fb13dbba1b7d7452d81d4425912abf

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ipfs://d41d03b31cf9db85101fd6d862e4d16ae947f2f349fad998342eeeb2576107d2