Good morning Chris,
> This could be worked around by honest makers because they > can consolidate TXOs on the blockchain, which rented TXO owners can't do > because the TXOs are owned by different people. Would it not be possible the below? * I rent some funds from Dmitry. I agree to pay him 0.5 BTC for this service of putting up 50BTC from Dmitry UTXO. * I also own 50BTC myself in a separate UTXO. * We create a funding transaction paying out to a Schnorr MuSig output that is 2-of-2 between us. This spends Dmitry UTXO 50 BTC and my UTXO 50BTC. We only create this yet and do not sign. * We create a backout transaction, probably with `nLockTime`, paying out 50.5BTC to Dmitry and 49.5BTC to me. This spends the funding transaction. We sign this using MuSig. * After we exchange the signatures of the backout transaction, we exchange signatures for the funding transaction. * Now we have a common 100BTC UTXO (indistinguishable from other Schnorr single-sig UTXOs) that can be used as fidelity bond for me. This is the output of the funding transaction. The above can be scaled up so I can rent arbitrary amounts of coin from many different people, who are assured of getting their funds back, in exchange for a fidelity bond / advertisement, and thus greatly destroying the properties of the V^2 tweak. (The ability to have shared ownership of UTXOs is a powerful feature of Bitcoin, and backs its ability to scale, as witnessed with Lightning Network and channel factories.) Regards, ZmnSCPxj _______________________________________________ bitcoin-dev mailing list bitcoin-dev@lists.linuxfoundation.org https://lists.linuxfoundation.org/mailman/listinfo/bitcoin-dev
