[watch-only] signer

[motorina0]

[watch-only] signer

[motorina0]

Secure communication:

• use ECDH to build the shared secret
• use AES-CBC for symmetric encryption

WHH side:

• uBitcoin point multiplication for secret derivation
• https://github.com/kokke/tiny-AES-c for encrypt/decrypt

Browser Side:

• https://github.com/paulmillr/noble-secp256k1 for secret derivation
• SubtleCrypto for encrypt/decrypt

[motorina0]

• refresh derivation path on network change
• add Home/Idle command (for example when seed sharing is done)

TODO

• test password with special characters (?)
• qrcode for xpub on UI
  • text also on HWW
• move utils to its own namespace no need
• make zpub more visible
• flush binaries
• seed next/prev
• bug: pair/forget list not updated
• UI <-> Signer version compatibility
• recheck console

[motorina0]

Tetris:

• https://github.com/VolosR/TTGOTetris/blob/main/TTgOTetris.ino?

[motorina0]

• PSBT checksum (check that the PSBT is not altered "in transit")
• install multiple versions
• connect to already paired device (in another window)