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BIP32 Support

We support generating signatures for a BIP32 child key. Perform keygen once, and generate signatures for all BIP32 child keys!

Perform Derive Child Public-Key​

  • Call SilentShard.ECDSA.deriveChildPublicKey or SilentShard.EdDSA.deriveChildPublicKey which returns Result of Success with Child Public-Key ByteArray or Failure with exception.

Example​

Example.kt

suspend fun deriveChildPublicKeyUsingKeyshare(
    keyshare: ByteArray,
    trioSession: TrioSession,
): ByteArray {
    return withContext(Dispatchers.IO) {
        //signature example for context
        trioSession.signature(
            keyshare = keyshare,
            message = messageHash,
            derivationPath = "m" // This is the default, use your desired path here. For e.g. 'm/1/2'
        ).getOrThrow()


        // child public key derivation
        SilentShard.ECDSA.deriveChildPublicKey<ByteArray>(
            keyshare = keyshare,
            derivationPath = "m/1",
            resultType = SilentShard.ResultType.ByteArray
        ).getOrThrow()
    }
}
  • When trioSession.sign() is called with a derivationPath, the signature is generated for the specified BIP32 derivation path.
  • derivationPath is a string that specifies the path to the child key. It defaults to 'm' (no derivation) if not provided.