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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 bytes as Data or Failure with error.

Example​

Example.swift
    func performKeyRefresh(keyshare: Data, duoSession: DuoSession) async -> Data?
    {
        let result = await duoSession.keyRefresh(
            keyshare: keyshare
        )
        // returns nil if operation fails or other flow you might have
        switch result {
        case .success(let dataBytes):
            do {
                // do something with bytes
                Swift.print(dataBytes)
                return dataBytes
            }
        case .failure(let error):
            do {
                // show error to user or abort process
                Swift.print(error)
                return nil
            }
        }
    }
  • 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 bytes as Data (client's new share of the MPC wallet) or Failure with error
  • 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.