The first comment in the pull request is: "The maximum size for OP_RETURN output... | Hacker News

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		bhaak on Jan 15, 2021 \| parent \| context \| favorite \| on: Smart contracts on Bitcoin The first comment in the pull request is: "The maximum size for OP_RETURN outputs used to be 80 bytes, then got changed to 40 bytes to be on the safe side. We have now been running with 40 bytes for about 9 months, and nothing catastrophic happened to the Blockchain, so I am proposing to increase it back to 80 bytes." The commit that is referenced by this comment is "script: reduce OP_RETURN standard relay bytes to 40" https://github.com/bitcoin/bitcoin/commit/8175c790eb There you can see that it was originally 80 bytes.

iso8859-1 on Jan 18, 2021 [–]

What do you mean by "originally"? It looks like it was introduced as 80 bytes here, so it had only been 80 bytes for a year or so: https://github.com/bitcoin/bitcoin/pull/2738

I recognize the commit where the limit was lowered, though I don't believe it was actually released before being raised again.

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