A minimum 2 partners is required.
It looks as if it doesn't exist.
Basically it looks like there is just a regular company in whatever jurisdiction (trader) doing business as usual.
In the background, there is a silent partnership contract, on the basis of which the silent partner undertakes to make a specific contribution to the management of the enterprise or a part thereof, and the trader undertakes to pay the silent partner a share of the profits︀ corresponding to the silent partner's contribution.
Now, let's imagine the trader is actually operating more︁ like "a front" (like a payment processor) and pays out almost everything to the silent︂ partner.
This is a perfect structure to combine higher tax jurisdictions with less reputable offshore︃ jurisdictions.
Investment is not always required. Partners could also contribute through work.