Broken Proxy

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Broken Proxy

Try this:
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contract Proxy {
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    address public implementation;
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    function setAddress(address a) external {
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        implementation = a;
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    }
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    function () external payable {
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        address impl = implementation;
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         assembly {
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    let ptr := mload(0x40)
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    calldatacopy(ptr, 0, calldatasize)
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    let result := delegatecall(gas, impl, ptr, calldatasize, 0, 0)
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    let size := returndatasize
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    returndatacopy(ptr, 0, size)
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​
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    switch result
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    case 0 { revert(ptr, size) }
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    default { return(ptr, size) }
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 }
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    }
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}
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​
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And use this contract to delegate to:
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contract Score {
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    uint public score;
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    function setScore(uint _score) external {
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        score = _score;
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    }
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}
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Fix this contract.
Try This
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contract Score {
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    bytes32 myHash = keccak256("This is awesome");
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    uint public score;
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    function setScore(uint _score) external {
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        score = _score;
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    }
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}
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​

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Proxy with Inheritance

Next - Tasks

Proxy with Unstructured Storage

Last modified 2yr ago

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