Too Long; Didn't Read
The scriptSig is an important part of Bitcoin’s transaction. In SegWit transaction, it is empty: this is the way through wich the Bitcoin protocol solves the Transaction malleability! We should know the Bitcoin Script key and the public signature that we can search the digital signature and search for the public key for this time. We know that there are enough constants to understand how many hex charters are used to get it. We save it in an environment variable SCRIPTSIG.