I'm in the process of understanding scriptSigs of transaction inputs and encountered some transactions with inputs that seem to be missing a public key.
This is what I expect to see as a scriptSig. A signature and a public key.
ScriptSig: PUSHDATA(71)[3044022017e2af6e1308d431365deeb5739d41a909cf0d61a9c0e48f3ae5b0bd6544bfc5022066e73dd26d71d824552b034b322603cce8b936912b99f4f3df512e502bd7c11e01] PUSHDATA(33)[03d7b3bc2d0b4b72a845c469c9fee3c8cf475a2f237e379d7f75a4f463f7bd6ebd]
However, I've encountered these type of scriptSigs as well. There seems to be no public key. What exactly is happening here?