in regards to the cause of SMO

How to swap a token for SOL or vise versa** from within** a Solana smart contract? That is, on-chain. How to interract with a router of either Raydium or SolDex? I haven't found any example of this.

In Python one would write:

file_name = 'fdsafdsafds.wav'
audio, sample_rate = librosa.load(file_name, res_type='kaiser_fast') 
mfccs = librosa.feature.mfcc(y=audio, sr=sample_rate, n_mfcc=40)

Is there such a library or the one with this functionality in other, compiled languages? in C++, Go, Rust, .NET.... I haven't found any

I want to create a simple web service that'll manage WireGuard VPN servers of mine in defferent locations. It'll work like this: whenever I try to access a site in from certain, pre-defined list, a web service (a) or a local customly-modified VPN client (b) will switch me to a VPN server in a certain location. When I go back to other, normal website, it'll switch me back to the last VPN server.

How would I go about this? Will it be implemented on the side of the server (a) - web service? Or on the client one (b) -- by a custom VPN client which I'd have to modify to incorporate this functionality?

But this won't compare to Europe which trolls itself by buying russian gas and oil still, and burning more of coal than ever.

What bad news? Why? Hasn't UA been winning all along, for 1.5 years?