Book mastering bitcoin 3rd edition, page 179.
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.
