You could do this whole thing with regular currency, so if you treat it like that the tax implications are no different to regular income. The government doesn'

You could do this whole thing with regular currency, so if you treat it like that the tax implications are no different to regular income. The government doesn't (yet) care how many apples you bought, or that you found some extra apples in the forest on your way home, they just care how much money you end up with when you sell those apples you found at the market.