About bitcoin taproot mutual satisfaction clause

Book mastering bitcoin 3rd edition, page 179.

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In MAST and with scriptless multisignatures, a mutual satisfaction clause is easy to design. We simply make one of the top leaves of the script tree a scriptless multi signature between all interested parties. We already saw a complex contract between several parties with a simple mutual satisfaction clause in Figure 7-7. We could make that more optimized by switching from scripted multisignature to scriptless multisignature.

What is the mutual satisfaction clause in Figure 7-7? thanks.



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