BIP-FAIR: Fair Fee Accounting for On-Chain Data with Segregated OP_RETURN (segOP) #2024

1. 
   defenwycke commented at 1:44 pm on October 29, 2025: none

   Author: defenwycke defenwycke@icloud.com

   This BIP removes the 75% witness discount for non-script data, introduces segOP as a clean, Merkle-rooted data section, and enforces a 100 KB total data cap per transaction.

   Key Rules

   • Data: OP_RETURN, segOP, or witness items >520 B (Taproot max push size)
   • Fee: Full 4 wu/byte for data (weight += data_size * 3)
   • Cap: 100,000 bytes total per tx
   • segOP: Post-witness, structured, verifiable via Merkle root

   Normal financial transactions are unaffected. Spam becomes uneconomical.

   Soft fork via BIP 9 (bit 5). Reference implementation included.

   Feedback welcome.

2. Add BIP-FAIR: Fair Fee Accounting for On-Chain Data with segOP

   Introduces segOP for clean data storage and full fees for non-script data. Soft fork proposal.

   980e139a57
3. 
   jonatack commented at 3:33 pm on October 29, 2025: member

   Hi @defenwycke, has this proposal been previously discussed with the community in a dedicated thread on the mail list?

   Please see BIP 2 for the process – suggest searching in it for sections containing the term “list”.

4. jonatack added the label New BIP on Oct 29, 2025
5. 
   defenwycke commented at 3:39 pm on October 29, 2025: none

   Hi @jonatack. I sent an email earlier to the dev group email.
6. 
   jonatack commented at 4:54 pm on October 29, 2025: member

   Hi @jonatack. I sent an email earlier to the dev group email.

   Thanks @defenwycke. In that case, this PR was opened prematurely. Please carefully read and follow the process described in BIP2.

7. 
   defenwycke commented at 5:02 pm on October 29, 2025: none

   Hey @jonatack. Yes - noted.
8. in bip-fair.mediawiki:138 in 980e139a57

   133+*Bitcoin Core v30.0 release notes: https://bitcoin.org/en/release/v30.0
   134+*Ordinals protocol documentation: https://ordinals.com
   135+
   136+==Acknowledgments==
   137+
   138+Inspired by discussions on bitcoin-dev mailing list and xAI assistance in drafting.
   

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   jonatack commented at 5:42 pm on October 29, 2025:

   Please do not use AI/LLMs. See https://github.com/bitcoin/bips/pull/2006/files for more.
9. 
   jonatack commented at 5:45 pm on October 29, 2025: member

   Closing for the reasons in #2024 (comment) and #2024 (review). You are free to retry via correctly following the process described in BIPs 2 / 3 and without using AI. Regards.
10. jonatack closed this on Oct 29, 2025

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defenwycke jonatack

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