Allow me to explain something. These guys had the current wormhole technology that most creatures have a very short time after the galaxy formed....I had best give a backstory to explain this better.
A short time after the formation of the galaxy, life began to form. There was much life, but it was undeveloped; the most advanced were two races. one was a pich black race, highly agressive, very territorital. The other was a peaceful race. Kind, friendly, and they did not jump to war very fast. These two races built up their technologies, their spacecraft, their civilisations. Eventually, the dark blobs, coming to call themselves "The Shadow" lauched a massive genocide against all other life in the galaxy, feeling it was far too inferior to have the right to live. Many races died out in the bloody affair. The other well developed race, apalled at this extreme violence, sent their fleet of mighty warships to engage the primary Shadow armada. Their secret weapon was a massive wormhole generator called The Divisor. This was the only device powerful enough to create a wormhole between universes. During the massive battle, they fired the great weapon. The whole of the Shadow fleet was cought in the wormhole. The weapon malfunctioned, and the power source was ejected, pulled into the wormhole as well. Though the threat of the Shadow was quelled for the moment, that power source gave them the technology that ultimately lead to their mastery of Wormhole tech, and gave birth to the current situation.What became of that other race? None remain who know.