In case of a k-of-n checksigadd multisignature tapscript, Tapscript is [pk0] [CHECKSIG] [PK1] [CHECKSIGADD] [PK2] [CHECKSIGADD] [2] [NUMEQUAL] and following are the possible spending witnesses:
[sig2] [sig1] []
[sig2] [] [sig0]
[] [sig1] [sig0]
How is the empty signature in witness stack specified when creating the spending txn?
In case of a k-of-n checksigadd multisignature tapscript, Tapscript is [pk0] [CHECKSIG] [PK1] [CHECKSIGADD] [PK2] [CHECKSIGADD] [2] [NUMEQUAL] and following are the possible spending witnesses: [sig2] [sig1] [] [sig2] [] [sig0] [] [sig1] [sig0] How is the empty signature in witness stack specified when creating the spending txn?