What Is the Primary Purpose of a "Scriptsig" in a Standard UTXO Transaction? ▴ Learn

What Is the Primary Purpose of a “Scriptsig” in a Standard UTXO Transaction?

The scriptSig is the unlocking script in a standard Bitcoin transaction. Its primary purpose is to provide the necessary data, typically a digital signature and the corresponding public key, to satisfy the conditions set by the locking script (scriptPubKey) of the UTXO being spent.

Essentially, it proves to the network that the sender has the authority to spend the funds. It is essential for transaction validation.

What Is the Relationship between a Private Key and a Public Key?

What Is a “Stack-Based” Language and How Does It Contribute to the Security Model of Bitcoin’s Script?

How Does the Elliptic Curve Digital Signature Algorithm (ECDSA) Relate to Public Key Security?

What Is the Mathematical Process Used to Derive a Public Key from a Private Key?