Function flow_sdk::algorithms::secp256k1::secp256k1_sys::secp256k1_ecdsa_signature_serialize_der

pub unsafe extern "C" fn secp256k1_ecdsa_signature_serialize_der(
    cx: *const Context, 
    output: *mut u8, 
    out_len: *mut usize, 
    sig: *const Signature
) -> i32