[feature][BTIP-52]: File share with encryption

[Shawn-Huang-Tron]

In BTFS, sharing files with a CID is good and convenient. However, if we want to keep our file secret and then share it with somebody, it will be hard. Cause the CID is public and anyone who gets this CID will know the content related to it.
So we raise this issue to solve this problem.

The docs about this BTIP is in: BTIP-52

[simbadMarino]

Are we having encryption by default? I think doing it like this will be better than expecting users to switch from public to private :)

[yu-btc]

My point: After an encrypted file is uploaded to the BTFS network, other nodes will not be able to access or view the file directly. Only users with the appropriate decryption key can decrypt and access these encrypted files. Therefore, when using BTFS for file storage, users are advised to choose and implement appropriate encryption measures on their own to ensure file security and privacy.

[simbadMarino]

Hello @yu-btc ! I just checked the release which includes this BTIP! Thank you for including this, it was a long awaited feature for some of us :)

Question: checking the docs looks like it takes the peerID as argument to encryption so it can later be decrypted using the node pk...

1. What is the relationship between the node BTTC Public Address and the peerID/NodeID?
2. By talking about the node pk are we talking about the BTTC wallet pk?

Thanks