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Update zombieownership.sol #6

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Update zombieownership.sol #6

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2 changes: 1 addition & 1 deletion lesson-5/chapter-6/zombieownership.sol
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Original file line number Diff line number Diff line change
Expand Up @@ -23,7 +23,7 @@ contract ZombieOwnership is ZombieAttack, ERC721 {
}

function transferFrom(address _from, address _to, uint256 _tokenId) external payable {
require (zombieToOwner[_tokenId] == msg.sender || zombieApprovals[_tokenId] == msg.sender);
require ((zombieToOwner[_tokenId] == msg.sender && _from == msg.sender) || (zombieApprovals[_tokenId] == msg.sender && _to == msg.sender));
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@BrandonNoad BrandonNoad Jan 2, 2022 •
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I think in both cases you need to check zombieToOwner[_tokenId] == _from.

So the fix would be:

require (zombieToOwner[_tokenId] == _from && (msg.sender == _from || (msg.sender == _to && zombieApprovals[_tokenId] == msg.sender)));

_transfer(_from, _to, _tokenId);
}

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