# Casey Rodarmor - Bitcoin Ordinal Numbers BIP (Highlights)  ## Metadata **Review**:: [readwise.io](https://readwise.io/bookreview/24536607) **Source**:: #from/readwise **Zettel**:: #zettel/fleeting **Status**:: #x **Authors**:: [[Casey Rodarmor]] **Full Title**:: Bitcoin Ordinal Numbers BIP **Category**:: #articles #readwise/articles **Category Icon**:: 📰 **URL**:: [github.com](https://github.com/casey/ord/blob/master/bip.mediawiki) **Host**:: [[github.com]] **Highlighted**:: [[2023-02-19]] **Created**:: [[2023-02-24]] ## Highlights - Every sat is serially numbered, starting at 0, in the order in which it is mined. These numbers are termed "ordinal numbers", or "ordinals", as they are ordinal numbers in the mathematical sense, giving the order of each sat in the totally supply. ([View Highlight](https://read.readwise.io/read/01gsm08y4f0y8qr5pja3kn30kw)) ^478593227 - The ordinal numbers of sats in transaction inputs are transferred to output sats in first-in-first-out order, according to the size and order of the transactions inputs and outputs ([View Highlight](https://read.readwise.io/read/01gsm097hay44ahbhtg131eew6)) ^478593234 - Underpaying the subsidy does not change the ordinal numbers of sats mined in subsequent blocks. Ordinals depend only on how many sats could have been mined, not how many actually were. ([View Highlight](https://read.readwise.io/read/01gsm0djzyvqfa2dbjwj0z1zr2)) ^478593565 - first ordinal of subsidy of block at given height ([View Highlight](https://read.readwise.io/read/01gsm0gbak9s46ndwvr1xe3n0b)) ^478593719 fee not counted