I meant not to use the OP_PUSH opcodes to do the push. Does OP_0 give a zero length byte array?
Would this script return true? OP_0 OP_PUSHDATA1 (length = 1, data = 0) OP_EQUAL The easiest definition is that OP_0 and OP_1 must be used to push the data and not any other push opcodes. On Fri, Nov 6, 2015 at 9:32 AM, Oleg Andreev <olega...@gmail.com> wrote: > > > One and zero should be defined as arrays of length one. Otherwise, it is > still possible to mutate the transaction by changing the length of the > array. > > > > They should also be minimally encoded but that is covered by previous > rules. > > These two lines contradict each other. Minimally-encoded "zero" is an > array of length zero, not one. I'd suggest defining this explicitly here as > "IF/NOTIF argument must be either zero-length array or a single byte 0x01". > > >
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