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- Take care of posts using older public key when key is replaced.
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notes: not very difficult, GetTransaction must receive a maximum block number to search the
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transaction (we get this from post["height"]). another txIndex should be set to speedup lookup
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(key in db includes the number of the block that changed tx so previous one can be found).
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pseudocode:
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getTxIndex( key = "userX" ) => block h contains this tx;
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while( h > max_h )
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getTxIndex( "userX_h" ) => block h contains the previous tx
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- Until old public key is properly used, disable banning torrent peers due to bad piece hashes.
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note: torrent.cpp line 3286 (function piece_failed), iteration to ban peers is disabled (continue).
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- Count UTF8 chars in acceptSignedPost to proper limit the 140 characters.
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- Encrypt user_data (which contains all DMs)
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- Test wallet encrypt to see if it still works from original bitcoin implementation and what
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are the implications to our code.
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- Rescan directmessages after importing a privatekey (importprivkey)
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- Check libtorrent's limitation on the number of pieces (max_pieces in piece_picker.hpp = 1<<19)
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Since post number is constrained by max of 288 posts per day in average, that means we have 5 years
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to think about it (for the really heavy users).
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- Besides increasing the maximum number of pieces, a more pressing issue to save bandwidth and
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torrent download time would be to define the first piece to download/store locally. People don't
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need to maintain the entire post history for everybody they follow, they could just keep the last
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ones. This has to be implemented.
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- Move all crypto to javascript, store only encrypted version of the privatekey (which would be
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decrypted only in browser memory). getposts may obtain all DMs encrypted to browser, another
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newpostmsg needs to be provided to receive posts with signature field added.
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- Store a dht resource "publickey" containing not only the public key itself but also information
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needed to validate it by a lightweight client. That includes: block hash, block height and partial
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merkle tree inside that block. This resource propagation cannot be sent right after user
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registration for obvious reasons (no block yet, other nodes wouldn't accept the signed dht put).
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- Discuss and implement the acceptable level of spam per day (priorizing localization).
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- Implement the mention forwarding mechanism discussed in the paper so user don't need to do polling
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and can also be sure to receive all mentions.
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- Implement hashtag "storage-less" torrents for post distribution.
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- Define expiration policies to dht stored values. Currently all keys are refreshed every hour which,
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according to previous bittorrent research, would be enough to keep data available forever (with high
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probability). twister also persists keys to disk. As userbase increases, old post storage and
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unreliable multivalued keys should better expire. Since those posts include the height and time, a
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policy may me defined.
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=> Implemented shouldDhtResourceExpire() which is tested on initialization but not really used yet.
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- Check stored dht values if their signature is still valid before trying to refresh another node.
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Key pair might have changed and currently we receive a lot of errors from other nodes.
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- save_file() must truncate file.
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-
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