public interface PrivyUser {
  // Other privy user methods

  public suspend fun createEthereumWallet(allowAdditional: Boolean = false):  Result<EmbeddedEthereumWallet>

  // ...
}

privy.user?.let { privyUser ->
  // non null user means user is authenticated
  val result = privyUser.createEthereumWallet(allowAdditional = false)

  result.fold(
    onSuccess = { ethereumWallet ->
      println("Created wallet with address: ${ethereumWallet.address}")
    },
    onFailure = {
      println("Error creating Ethereum wallet: ${it.message}")
    }
  )
}

public interface EmbeddedEthereumWalletProvider {
 /**
  * Sends a request to the Ethereum provider
  *
  * @param The RPC request
  * @return The response received
  */
 public suspend fun request(request: EthereumRpcRequest): Result<EthereumRpcResponse>
}

// Get Privy user
val user = privy.user

// check if user is authenticated
if (user != null) {
  // Retrieve list of user's embedded Ethereum wallets
  val ethereumWallets = user.embeddedEthereumWallets

  if (ethereumWallets.isNotEmpty()) {
    // Grab the desired wallet. Here, we retrieve the first wallet
    val ethereumWallet = ethereumWallets.first()

    // Make an rpc request
    ethereumWallet.provider.request(
      request = EthereumRpcRequest(
        method = "personal_sign",
        params = listOf("A message to sign", ethereumWallet.address),
      ),
    )
  }
}

public interface PrivyUser {
  // Other privy user methods

  public suspend fun createSolanaWallet():  Result<EmbeddedSolanaWallet>

  // ...
}

privy.user?.let { privyUser ->
  // non null user means user is authenticated
  val result = privyUser.createSolanaWallet()

  result.fold(
    onSuccess = { solanaWallet ->
      println("Created wallet with address: ${solanaWallet.address}")
    },
    onFailure = {
      println("Error creating Solana wallet: ${it.message}")
    }
  )
}

public interface EmbeddedSolanaWalletProvider {
  /**
   * Request a signature on a Base64 encoded message or transaction
   *
   * @param message Base64 encoded message or transaction
   * @return The Base64 encoded computed signature
   */
  public suspend fun signMessage(message: String): Result<String>
}

// Get current auth state
val user = privy.user

// check if user is authenticated
if (user != null) {
    // Retrieve the user's Solana wallet
    val solanaWallet = user.embeddedSolanaWallets.first()

    if (solanaWallet != null) {
        // Base 64 encoded: "Hello! I am the base64 encoded message to be signed."
        val result = solanaWallet.provider.signMessage("SGVsbG8hIEkgYW0gdGhlIGJhc2U2NCBlbmNvZGVkIG1lc3NhZ2UgdG8gYmUgc2lnbmVkLg==")
    }
}