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Subject: [bitcoin-dev] Coinjoin with less steps using ALL|ANYONECANPAY
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Hi Bitcoin Developers,
I recently experimented with different sighash flags, PSBTs and realized AL=
L|ANYONECANPAY could be used to reduce some steps in coinjoin.
Steps:
- Register outputs.
- One user creates a signed PSBT with 1 input, all registered outputs and A=
LL|ANYONECANPAY sighash flag. Other participants keep adding their inputs t=
o PSBT.
- Finalize and broadcast the transaction.
Proof of Concept (Aice and Bob):=C2=A0https://gitlab.com/-/snippets/2542297
Tx: https://mempool.space/testnet/tx/c6dd626591dca7e25bbd516f01b23171eb0f2b=
623471fcf8e073c87c1179c492
I plan to use this in joinstr if there are no major drawbacks and it can ev=
en be implemented by other coinjoin implementations.=20
/dev/fd0
floppy disk guy
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