script: give `Builder` ability to verify-ify opcodes #286
I don't think many people build a script if they don't know what script they are going to build beforehand.. I mean that almost all usage of
If you know all your script opcodes upfront, you can just as well manually verify-ify the last opcode and if you don't know all upcodes upfront, you're doing dangerous stuff.
Updated to fix bug where slices that ended in a
@stevenroose This function is semantically equivalent to