Hi All,
OP_CHECKOUTPUTSHASHVERIFY is retracted in favor of OP_SECURETHEBAG*. OP_SECURETHEBAG does more or less the same thing, but fixes malleability issues and lifts the single output restriction to a known number of inputs restriction.
OP_CHECKOUTPUTSVERIFY had some issues with malleability of version and locktime. OP_SECURETHEBAG commits to both of these values.
OP_SECURETHEBAG also lifts the restriction that OP_CHECKOUTPUTSVERIFY had to be spent as only a single input, and instead just commits to the number of inputs. This allows for more flexibility, but keeps it easy to get the same single output restriction.
A particularly useful topic of discussion is how best to eliminate the PUSHDATA and treat OP_SECURETHEBAG like a pushdata directly. I thought about how the interpreter works and is implemented and couldn't come up with something noninvasive.
Thank you for your review and discussion,
* Plus the name is better