pub async fn sign_prepared_tx(
        &self,
        data: Vec<u8>,
        options: Options,
    ) -> Result<SignedCallResult, SigningError> {
        self.sign_prepared_tx_for_addr(data, self.contract_addr(), options)
            .await
    }
Similar to [`EthInterface::sign_prepared_tx_for_addr`], but is fixed over `Self::contract_addr()`.
core/lib/eth_client/src/lib.rs