Serialize an ECDSA signature in compact format (64 bytes + recovery id).
1 Args: ctx: a secp256k1 context object. Out: output64: a pointer to a 64-byte array of the compact signature. recid: a pointer to an integer to hold the recovery id. In: sig: a pointer to an initialized signature object.
See Implementation
Serialize an ECDSA signature in compact format (64 bytes + recovery id).