Sign

This distributed signing process allows for secure transaction authorization while preserving the key's distributed nature, exemplifying the MPC wallet's enhanced security model.

Step 1 : Create Session

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• Create TrioSession if you haven't already.

Step 2 : Perform Sign

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• Call trioSession.sign() which returns Result of Success with Signature ByteArray or Failure with exception.

Example

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Example.kt

val messageHash = "e2a159d17b7bb714aed7675d7c7d394dec8d2e4337842848104694bf89c71c03"

// Sign the message hash with the key addressed by keyId (returned from keygen/import).
suspend fun performSignature(keyId: String, trioSession: TrioSession): ByteArray {
    return withContext(Dispatchers.IO) {
        trioSession.sign(
            keyId = keyId,
            message = messageHash,
            derivationPath = "m" // This is the default; use your desired path, e.g. "m/1/2"
        ).getOrThrow()
    }
}

• keyId is the identifier returned by keygen that addresses the client's keyshare in your storage.
• messageHash is the hash of the message to be signed as ByteArray.
• trioSession.sign() performs message exchange between mobile and server to generate a ECDSA/EdDSA signature.
• Result of trioSession.sign() could be a Success with ByteArray (ECDSA/EdDSA signature) of messageHash, corresponding to the public key (or address) of the wallet or Failure with Exception.