Function indy_sys::ledger::indy_register_transaction_parser_for_sp

#[no_mangle]
pub unsafe extern "C" fn indy_register_transaction_parser_for_sp(
    command_handle: Handle, 
    txn_type: CString, 
    parser: Option<CustomTransactionParser>, 
    free: Option<CustomFree>, 
    cb: Option<ResponseEmptyCB>
) -> Error