AFAIU the number was picked to protect against CVE-2017-12842 covertly. See: https://github.com/bitcoin/bitcoin/pull/16885 which updated the text to explicitly mention this fact.

On Sat, May 23, 2020 at 11:20 AM Thomas Voegtlin via bitcoin-dev <bitcoin-dev@lists.linuxfoundation.org> wrote:

Hello list,

I have been trying to CPFP a transaction using OP_RETURN, because the
remaining output value would have been lower than the dust threshold.

The scriptPubkey of the output was OP_RETURN + OP_0, and there was a
single p2wsh input.

The result is a 60 bytes transaction (without witness), that gets
rejected because it is lower than MIN_STANDARD_TX_NONWITNESS_SIZE, which
is equal to 82 bytes.

Why is that value so high? Would it make sense to lower it to 60?


Thomas
_______________________________________________
bitcoin-dev mailing list
bitcoin-dev@lists.linuxfoundation.org
https://lists.linuxfoundation.org/mailman/listinfo/bitcoin-dev