Multichains stables to native BTC Bot guidance

[xcvb74]

Hi,
I'm in the process of building a very (very) simple bot to buy native BTC from stables (USDC, USDT mostly) on SOL, ETH & L2s (& potentially SUI).
I'm looking for the most efficient way to do this, if possible using a product already existing in Wormhole ecosystem, with very low fees, and the user keeps custody of funds at all times.
Who can guide me a bit in a correct direction for this project?