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Key Recovery

Restore the client's secret shares to regain access to the wallet without changing its public address or key.

Step 1 : Create Session​

Step 2 : Perform Key-Refresh​

  • We need to have key-share's public key to recover the share.
  • Call trioSession.recovery() which returns Result of Success with Refreshed-Keyshare ByteArray or Failure with exception.

Example​

Example.kt
suspend fun performKeyRefresh(trioSession: TrioSession): ByteArray {
    return withContext(Dispatchers.IO) {

        //At some point of time you might have done keygen.
        val keyshare = trioSession.keygen().getOrThrow()

        //You might have stored public-key of the keyshare(ECDSA).
        val keysharePublicKey = SilentShard.ECDSA.getKeysharePublicKey<ByteArray>(keyshare).getOrThrow()

        // Perform recovery operation
        val recoveredKeyshare = trioSession.recovery(keysharePublicKey = keysharePublicKey).getOrThrow()

        recoveredKeyshare
    }
}
  • trioSession.recovery() performs message exchange between mobile and server to "recover" the MPC wallet. Refer to Key Recovery for more details.
  • Result of trioSession.recovery() could be a Success with ByteArray (client's recovered share of the MPC wallet) or Failure with Exception
  • This process enhances the long-term security of the MPC wallet by proactively updating the client's and server's secret shares.
  • The wallet's public address or key remains unchanged during this process.