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These functions are transferring ether between balances, so why aren't they modified with payable?

Jossie Calderon
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1 Answers1

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Those examples date from a version of solidity prior to when the payable modifer existed. I believe it was introduced in version 0.4.0, released on September 8, 2016. The blog post you link to dates from July of 2016

Jeff Coleman
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