BIP Draft SENDTEMPLATE #1937

1. 
   ajtowns commented at 1:32 am on August 18, 2025: contributor

   Adds a BIP for SENDTEMPLATE, GETTEMPLATE, TEMPLATE p2p messages. Some discussion at

   https://delvingbitcoin.org/t/sharing-block-templates/1906

   (Post to bitcoindev group hasn’t made it through after about 5 days at this point)

2. bip-ajtowns-sendtemplate a89b303492
3. jonatack added the label New BIP on Aug 18, 2025
4. 
   jonatack commented at 4:45 pm on August 18, 2025: member

   Post to bitcoindev group hasn’t made it through

   fixed, published

5. in bip-ajtowns-sendtemplate.md:16 in a89b303492

   11+  License: BSD-3-Clause
   12+```
   13+
   14+## Abstract
   15+
   16+This BIP describes the use of [BIP-152 compact blocks][BIP-152] enccoding
   

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   murchandamus commented at 10:32 pm on August 18, 2025:

   0This BIP describes the use of [BIP-152 compact blocks][BIP-152] encoding
   

6. in bip-ajtowns-sendtemplate.md:74 in a89b303492

   69+and should be the hash of a block made up of those transactions.
   70+4. The transactions making up the payload of the template should be valid
   71+as a block -- for example all unconfirmed parents of a transaction should be
   72+included before the transaction, and consensus limits should be respected.
   73+5. A block containing the transactions making up the payload must not
   74+exceed four million weight units as defined in [BIP-141][BIP-141].
   

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   murchandamus commented at 10:48 pm on August 18, 2025:

   Have you considered allowing more data than just the top block? Otherwise, would you recommend that a node requests a template after each block is found for the first few new blocks after they come online? Have you considered a reconciliation-based approach akin to Erlay?
7. 
   murchandamus commented at 10:54 pm on August 18, 2025: contributor

   Interesting idea, thanks for sharing.

Contributors
ajtowns jonatack murchandamus

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