Replying to Avatar Leo Wandersleb

The SegWit discount of 4x is arbitrary though.

Pre-SegWit nodes see SegWit transactions as anyone-can-spend "unsigned" transactions, so they don't know of signatures and the weight thereof. They do count the bytes of OP_RETURN though as it's not segregated.
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Carman 2y ago

It's not arbitrary, it was picked because it makes spending inputs cheaper than creating new outputs.

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Leo Wandersleb 2y ago

The "4x" is arbitrary. The discount in general not.

With "arbitrary" I mean there is no scientific reason why exactly this number is the correct one.

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Carman 2y ago

It isn't arbitrary, it's the smallest whole number where we cross that threshold of making inputs cheaper

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Leo Wandersleb 2y ago

Sounds arbitrary to me. Why not use a decimal number ;)

Ok, TIL. Will read up on the details ...

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Carman 2y ago

You don't want to use floats for money