private fun getSignedNetworkParameters(): NetworkParameters {

        //load the notary from a Keystore. This avoids having to start a flow from a node in order to retrieve NotaryInfo
        val notary = loadKeyStore("\path-to-keystore\keystore.jks", "keystore-password")

        val certificateAndKeyPair : CertificateAndKeyPair = notary.getCertificateAndKeyPair("entry-alias", "entry-password")
        val notaryParty = Party(certificateAndKeyPair.certificate)
        val notaryInfo = listOf(NotaryInfo(notaryParty, false))

        //map contract ID to the SHA-256 hash of its CorDapp contracts&states JAR file
        val whitelistedContractImplementations = mapOf(
                TestContract.TEST_CONTRACT_ID to listOf(getCheckSum(contractFile))
        )

        return NetworkParameters(minimumPlatformVersion = 3, notaries = notaryInfo,
                maxMessageSize = n, maxTransactionSize = n, modifiedTime = Instant.now(),
                epoch = 1, whitelistedContractImplementations = whitelistedContractImplementations)
    }