> For the complete documentation index, see [llms.txt](https://docs.ethgas.com/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.ethgas.com/overview/products-deepdive/inclusion-preconfirmations.md).
# Inclusion Preconfirmations
Inclusion Preconfirmations (or Inclusion Preconfs) are commitments whereby the Proposer guarantees to include your transactions within a specific block N. Bids are for a fixed amount of blockspace (e.g. 200k gas units), may be included anywhere in the block, and do not carry any reversion guarantees.
Inclusion Preconf markets are created only when a Validator/Proposer has performed an initial, primary market sale of the Preconfs into the market. That is, it is not possible to ‘short’ an Inclusion Preconf.
Transaction Fees: \[ 5% ] on Initial Sale, \[ 30 ] bps on secondary market trading TBC
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