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Key Refresh

Update the client's and server's secret shares without altering the wallet's public address or key.

Step 1 : Create Session​

Step 2 : Perform Key-Refresh​

  • Call duoSession.keyRefresh() which returns Result of Success with Refreshed-Keyshare ByteArray or Failure with exception.

Example​

Example.kt
suspend fun performKeyRefresh(keyshare: ByteArray, duoSession: DuoSession): ByteArray {
    return withContext(Dispatchers.IO) {
        duoSession.keyRefresh(
            keyshare = keyshare
        ).getOrThrow()
    }
}
  • keyshare is the client's "share" of the MPC wallet.
  • duoSession.keyRefresh() performs message exchange between mobile and server to "refresh" the MPC wallet. Refer to Key Refresh for more details.
  • Result of duoSession.keyRefresh() could be a Success with ByteArray (client's new 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.