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At this point of the documentation a new Solidity learner will not understand this line without further explanation:
if (!payable(msg.sender).send(amount)) {
It should explain how msg.sender is of type "address" and not "address payable" so it cannot send or receive Ether. Therefore it must be explicitly converted to payable.
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| .. | ||
| blind-auction.rst | ||
| micropayment.rst | ||
| modular.rst | ||
| safe-remote.rst | ||
| voting.rst | ||