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luv2drnkbr (OP)
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August 17, 2016, 10:03:42 AM
 #1
Can OP_NOTIF begin an if/else block?  That is, is the following code valid:

Code:
<true / false stack item>
OP_NOTIF
    <some script to be executed>
OP_ENDIF

Or does an if/else block need to always begin with an OP_IF?

I assume I am correct that you can begin with OP_NOTIF, and that the above script code is valid, but I wanted to double check.
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August 17, 2016, 12:51:23 PM
 #2
That is correct, you can begin the block with OP_NOTIF.
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luv2drnkbr (OP)
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August 19, 2016, 08:53:49 AM
 #3
Thanks.  It would be cleaner to use OP_IF, but it saves redeemscript space to use NOTIF, and for Bitcoin I figure saving space is the way to go.
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