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codiak / socialarchive-dapp

Dapp built on Swarm to back-up and interact with Twitter data.
GNU General Public License v3.0
2 stars 3 forks source link

Show recently archived backups #33

Closed ameer-clara closed 2 years ago

ameer-clara commented 2 years ago

Out of the list below, reviewed Swarm Feeds and PSS.

PSS is quite interesting, it allows for subscribing to a topic to get real time push updates via websockets, however, it requires running a local server to get certain info, such as address. We should revisit it sometime in the future.

For reading and writing profiles (when uploading archive)

Screen Shot 2022-02-03 at 2 44 28 AM

Implement using Swarm Feeds and Single Owner Chunks (soc)

Algo

upload (4 network calls - probably more behind the scenes)

  1. upload bundle and get hash

    bee.uploadFile
returns <Reference> 
{
reference: hash
}

  2. upload feed with hash^ and get feed index

    feedWriter.upload(stamp, hash);
feedReader.download()
returns {
feedIndex: "0000000000000005"
...
}

  3. upload profile by adding feedIndex^ to topic

    const profile = {
timestamp,
name,
username,
hash,
bio,
profileImage, // converted to ascii art :)
};
topic.writeUInt16LE(feedIndex, 0);
socWriter.upload(stamp, topic, compress(profile)); // payload restriction of 4096 bytes

browse (1 + n network calls)

  1. get latest feedIndex 
    feedReader.download();
returns {
feedIndex: "0000000000000006"
...
}
  2. download profiles by using feed index 
    for (index === feedIndex; index>0; index--)
topic.writeUInt16LE(index, 0);
decompress(socReader.download(topic));

See #62 for cache details