do not actually compute the nested p2wsh-p2sh script if just estimating size (#4412)

7 years ago · c6fce4b7cc
1 changed files with 4 additions and 1 deletions
--- a/lib/transaction.py
+++ b/lib/transaction.py
@ -825,6 +825,9 @@ class Transaction:
            scriptSig = bitcoin.p2wpkh_nested_script(pubkey)
            return push_script(scriptSig)
        elif _type == 'p2wsh-p2sh':
+            if estimate_size:
+                witness_script = ''
+            else:
                witness_script = self.get_preimage_script(txin)
            scriptSig = bitcoin.p2wsh_nested_script(witness_script)
            return push_script(scriptSig)