Hmm ... It's impossible ;-) This RPM doesn't exist on any FTP server

Provides :
libfilezilla-devel
libfilezilla-devel(x86-64)
pkgconfig(libfilezilla)

Requires :

/usr/bin/pkg-config
libfilezilla45 = 0.48.1-lp160.1.2
pkgconfig(gnutls) >= 3.7.0
pkgconfig(hogweed) >= 3.3
pkgconfig(nettle) >= 3.3
rpmlib(CompressedFileNames) <= 3.0.4-1
rpmlib(FileDigests) <= 4.6.0-1
rpmlib(PayloadFilesHavePrefix) <= 4.0-1
rpmlib(PayloadIsZstd) <= 5.4.18-1

Content of RPM :
/usr/include/libfilezilla
/usr/include/libfilezilla/aio
/usr/include/libfilezilla/aio/aio.hpp
/usr/include/libfilezilla/aio/reader.hpp
/usr/include/libfilezilla/aio/writer.hpp
/usr/include/libfilezilla/aio/xml_writer.hpp
/usr/include/libfilezilla/apply.hpp
/usr/include/libfilezilla/ascii_layer.hpp
/usr/include/libfilezilla/basic_tls_params.hpp
/usr/include/libfilezilla/buffer.hpp
/usr/include/libfilezilla/encode.hpp
/usr/include/libfilezilla/encryption.hpp
/usr/include/libfilezilla/event.hpp
/usr/include/libfilezilla/event_handler.hpp
/usr/include/libfilezilla/event_loop.hpp
/usr/include/libfilezilla/file.hpp
/usr/include/libfilezilla/format.hpp
/usr/include/libfilezilla/forward_like.hpp
/usr/include/libfilezilla/fsresult.hpp
/usr/include/libfilezilla/glue
/usr/include/libfilezilla/glue/unix.hpp
/usr/include/libfilezilla/glue/wx.hpp
/usr/include/libfilezilla/glue/wxinvoker.hpp
/usr/include/libfilezilla/hash.hpp
/usr/include/libfilezilla/hostname_lookup.hpp
/usr/include/libfilezilla/http
/usr/include/libfilezilla/http/client.hpp
/usr/include/libfilezilla/http/client_request.hpp
/usr/include/libfilezilla/http/client_response.hpp
/usr/include/libfilezilla/http/digest.hpp
There is 1247 files more in these RPM.