diff --git a/src/dlt/config/ca.org1.example.com-cert.pem b/src/dlt/config/ca.org1.example.com-cert.pem
index 230cb04a1862d9b82f98b961e6238448d9b803a7..9c10b97908d70ae16b542f922563dbcba21056c6 100644
--- a/src/dlt/config/ca.org1.example.com-cert.pem
+++ b/src/dlt/config/ca.org1.example.com-cert.pem
@@ -1,14 +1,14 @@
 -----BEGIN CERTIFICATE-----
-MIICJjCCAc2gAwIBAgIUUg8VnWZ4QPo0ohjSzLtOg5SnqbswCgYIKoZIzj0EAwIw
+MIICJjCCAc2gAwIBAgIULDVQiqifWHypuW50LhHXSJeeFG0wCgYIKoZIzj0EAwIw
 cDELMAkGA1UEBhMCVVMxFzAVBgNVBAgTDk5vcnRoIENhcm9saW5hMQ8wDQYDVQQH
 EwZEdXJoYW0xGTAXBgNVBAoTEG9yZzEuZXhhbXBsZS5jb20xHDAaBgNVBAMTE2Nh
-Lm9yZzEuZXhhbXBsZS5jb20wHhcNMjExMTIyMTg0ODAwWhcNMzYxMTE4MTg0ODAw
+Lm9yZzEuZXhhbXBsZS5jb20wHhcNMjExMTIzMTIzNzAwWhcNMzYxMTE5MTIzNzAw
 WjBwMQswCQYDVQQGEwJVUzEXMBUGA1UECBMOTm9ydGggQ2Fyb2xpbmExDzANBgNV
 BAcTBkR1cmhhbTEZMBcGA1UEChMQb3JnMS5leGFtcGxlLmNvbTEcMBoGA1UEAxMT
-Y2Eub3JnMS5leGFtcGxlLmNvbTBZMBMGByqGSM49AgEGCCqGSM49AwEHA0IABIOo
-NtC20scX8QGQgcSUvaau9RwQsKnq/t0914d3BoIqvBD94Ue1xX2VKEgFdQnQtIJq
-/ZzT63f3QC0fG5BrSjmjRTBDMA4GA1UdDwEB/wQEAwIBBjASBgNVHRMBAf8ECDAG
-AQH/AgEBMB0GA1UdDgQWBBTQn8ZDeefPmduovU85c2bqzyzb8TAKBggqhkjOPQQD
-AgNHADBEAiBXRKPF+MCMWIAzkHnbgeVrmKJBBjj6EeKU1IpdExDIogIgIw2PR2lx
-KSoiemyU6hTEWbBmpkJbTIEiuGljYvd4uIQ=
+Y2Eub3JnMS5leGFtcGxlLmNvbTBZMBMGByqGSM49AgEGCCqGSM49AwEHA0IABFNi
+ggnkzv5qQSkIAQ05Y9DUq4teNjbMTdqD0IwdQe+lcYI0wgkR9wpBn5fj2pN093+P
+l2crhgyNqZyAuqaylvCjRTBDMA4GA1UdDwEB/wQEAwIBBjASBgNVHRMBAf8ECDAG
+AQH/AgEBMB0GA1UdDgQWBBS44tGlbJ5GIBwATL383Hw0vz8jHDAKBggqhkjOPQQD
+AgNHADBEAiAlkKikh7eG8lf0uI7NwBi0QrbnnY4vHf9ErceKwUhZWgIgS9Z9AzBc
+n9RAK3v/freT3Exs7b+MK13UeDdejRWS+RE=
 -----END CERTIFICATE-----
diff --git a/src/dlt/config/connection-org1.json b/src/dlt/config/connection-org1.json
index c22fe293394b93e40daf2544ed624bee786a9a73..c28ac57118e8695375187eaf103f1f499f2cf301 100644
--- a/src/dlt/config/connection-org1.json
+++ b/src/dlt/config/connection-org1.json
@@ -26,7 +26,7 @@
         "peer0.org1.example.com": {
             "url": "grpcs://s2:7051",
             "tlsCACerts": {
-                "pem": "-----BEGIN CERTIFICATE-----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\nKSoiemyU6hTEWbBmpkJbTIEiuGljYvd4uIQ=\n-----END CERTIFICATE-----\n"
+                "pem": "-----BEGIN CERTIFICATE-----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\nn9RAK3v/freT3Exs7b+MK13UeDdejRWS+RE=\n-----END CERTIFICATE-----\n"
             },
             "grpcOptions": {
                 "ssl-target-name-override": "peer0.org1.example.com",
@@ -36,7 +36,7 @@
         "peer0.org2.example.com": {
             "url": "grpcs://s2:9051",
             "tlsCACerts": {
-                "pem": "-----BEGIN CERTIFICATE-----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\ngsqR6Ye2X75ek2vTymVXVDFJ\n-----END CERTIFICATE-----\n"
+                "pem": "-----BEGIN CERTIFICATE-----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\nZG8mXOJeZu0Zro9DuQUEDPBfDQ==\n-----END CERTIFICATE-----\n"
             },
             "grpcOptions": {
                 "ssl-target-name-override": "peer0.org2.example.com",
@@ -50,7 +50,7 @@
             "caName": "ca-org1",
             "tlsCACerts": {
                 "pem": [
-                    "-----BEGIN CERTIFICATE-----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\nKSoiemyU6hTEWbBmpkJbTIEiuGljYvd4uIQ=\n-----END CERTIFICATE-----\n"
+                    "-----BEGIN CERTIFICATE-----\nMIICJjCCAc2gAwIBAgIULDVQiqifWHypuW50LhHXSJeeFG0wCgYIKoZIzj0EAwIw\ncDELMAkGA1UEBhMCVVMxFzAVBgNVBAgTDk5vcnRoIENhcm9saW5hMQ8wDQYDVQQH\nEwZEdXJoYW0xGTAXBgNVBAoTEG9yZzEuZXhhbXBsZS5jb20xHDAaBgNVBAMTE2Nh\nLm9yZzEuZXhhbXBsZS5jb20wHhcNMjExMTIzMTIzNzAwWhcNMzYxMTE5MTIzNzAw\nWjBwMQswCQYDVQQGEwJVUzEXMBUGA1UECBMOTm9ydGggQ2Fyb2xpbmExDzANBgNV\nBAcTBkR1cmhhbTEZMBcGA1UEChMQb3JnMS5leGFtcGxlLmNvbTEcMBoGA1UEAxMT\nY2Eub3JnMS5leGFtcGxlLmNvbTBZMBMGByqGSM49AgEGCCqGSM49AwEHA0IABFNi\nggnkzv5qQSkIAQ05Y9DUq4teNjbMTdqD0IwdQe+lcYI0wgkR9wpBn5fj2pN093+P\nl2crhgyNqZyAuqaylvCjRTBDMA4GA1UdDwEB/wQEAwIBBjASBgNVHRMBAf8ECDAG\nAQH/AgEBMB0GA1UdDgQWBBS44tGlbJ5GIBwATL383Hw0vz8jHDAKBggqhkjOPQQD\nAgNHADBEAiAlkKikh7eG8lf0uI7NwBi0QrbnnY4vHf9ErceKwUhZWgIgS9Z9AzBc\nn9RAK3v/freT3Exs7b+MK13UeDdejRWS+RE=\n-----END CERTIFICATE-----\n"
                 ]
             },
             "httpOptions": {
@@ -62,7 +62,7 @@
         "orderer0.example.com": {
             "url": "grpcs://s2:7050",
             "tlsCACerts": {
-                "pem": "-----BEGIN CERTIFICATE-----\nMIICCzCCAbGgAwIBAgIUVXJ8op9+t1XoWR3BDbodSHNA4WcwCgYIKoZIzj0EAwIw\nYjELMAkGA1UEBhMCVVMxETAPBgNVBAgTCE5ldyBZb3JrMREwDwYDVQQHEwhOZXcg\nWW9yazEUMBIGA1UEChMLZXhhbXBsZS5jb20xFzAVBgNVBAMTDmNhLmV4YW1wbGUu\nY29tMB4XDTIxMTEyMjE4NDgwMFoXDTM2MTExODE4NDgwMFowYjELMAkGA1UEBhMC\nVVMxETAPBgNVBAgTCE5ldyBZb3JrMREwDwYDVQQHEwhOZXcgWW9yazEUMBIGA1UE\nChMLZXhhbXBsZS5jb20xFzAVBgNVBAMTDmNhLmV4YW1wbGUuY29tMFkwEwYHKoZI\nzj0CAQYIKoZIzj0DAQcDQgAE3ZjdgxSVlZpHiFHRjd7Sct5YSFlPOuKePGT8i8SN\nWh5bZje2JHSQ4JMMgiiyALJCHUdBqnfs05D0ds4Hz4rJUaNFMEMwDgYDVR0PAQH/\nBAQDAgEGMBIGA1UdEwEB/wQIMAYBAf8CAQEwHQYDVR0OBBYEFEsA2wOBKpjnILGy\nIPtNmvIrwAt4MAoGCCqGSM49BAMCA0gAMEUCIQDxg/NK2ZuNrzA6U/lRU6IWQbwt\nC9gWNlz55pCS2HlWsAIgCHLo4oaECBYmGosqrC5hZQ5NgdV60X9Td0QC6zdYmJk=\n-----END CERTIFICATE-----\n"
+                "pem": "-----BEGIN CERTIFICATE-----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\n-----END CERTIFICATE-----\n"
             },
             "grpcOptions": {
                 "ssl-target-name-override": "orderer0.example.com",
diff --git a/src/dlt/src/main/kotlin/Main.kt b/src/dlt/src/main/kotlin/Main.kt
index d1e7e3076c0e12ed4578cccb05665d59138dc29b..be5de110fd611d4cf57d88eccf37c19036ac4ed7 100644
--- a/src/dlt/src/main/kotlin/Main.kt
+++ b/src/dlt/src/main/kotlin/Main.kt
@@ -2,7 +2,6 @@ import io.ktor.client.*
 import io.ktor.client.engine.cio.*
 import io.ktor.client.features.*
 import io.ktor.client.request.*
-import io.ktor.http.*
 import io.ktor.utils.io.jvm.javaio.*
 import kotlinx.serialization.ExperimentalSerializationApi
 import proto.Config
@@ -74,7 +73,7 @@ suspend fun main(args: Array<String>) {
 
     try {
         val newRecord = Config.DltRecord.newBuilder().setId(id).setOperation(Config.DltRecordOperation.UPDATE)
-            .setType(Config.DltRecordType.SLICE).setJson("{}").build()
+            .setType(Config.DltRecordType.UNKNOWN).setJson("{}").build()
         val result = client.post<ByteArray>("http://localhost:8080/dlt/record") {
             body = newRecord.toByteArray()
         }
@@ -103,5 +102,4 @@ suspend fun main(args: Array<String>) {
         println(e.response.status)
         println(String(e.response.content.toInputStream().readAllBytes()))
     }
-
 }
\ No newline at end of file
diff --git a/src/dlt/src/main/kotlin/fabric/FabricConnector.kt b/src/dlt/src/main/kotlin/fabric/FabricConnector.kt
index 45e86c869e32f9cba1095ace8f9c25e2e93b607f..36e06b06861a94d3465786bf032bb48990bb737a 100644
--- a/src/dlt/src/main/kotlin/fabric/FabricConnector.kt
+++ b/src/dlt/src/main/kotlin/fabric/FabricConnector.kt
@@ -1,8 +1,5 @@
 package fabric
 
-import com.google.protobuf.util.JsonFormat
-import kotlinx.serialization.decodeFromString
-import kotlinx.serialization.json.Json
 import org.hyperledger.fabric.gateway.Contract
 import org.hyperledger.fabric.gateway.Wallet
 import org.hyperledger.fabric.gateway.Wallets
@@ -50,12 +47,8 @@ class FabricConnector(val config: Config.DltConfig) {
     }
 
     fun getData(uuid: String): Config.DltRecord {
-        // TODO: get rid of json encoding/decoding
         val result = contract.evaluateTransaction("GetRecord", uuid)
-        println(String(result))
-        val builder = Config.DltRecord.newBuilder()
-        val protoRes = JsonFormat.parser().merge(String(result), builder)
-        return builder.build()
+        return Config.DltRecord.parseFrom(result)
     }
 
     fun updateData(record: Config.DltRecord): String {
diff --git a/src/dlt/src/main/kotlin/proto/Config.proto b/src/dlt/src/main/kotlin/proto/Config.proto
index 2ccf8456f3448bc150500bd0e8a8a5b84339cf02..0438785214180813909c801f5f54a2a16bd0aff3 100644
--- a/src/dlt/src/main/kotlin/proto/Config.proto
+++ b/src/dlt/src/main/kotlin/proto/Config.proto
@@ -21,16 +21,18 @@ message DltRecordId {
 }
 
 enum DltRecordOperation {
-  ADD = 0;
-  UPDATE = 1;
-  DISABLE = 2;
+  OP_UNSET = 0;
+  ADD = 1;
+  UPDATE = 2;
+  DISABLE = 3;
 }
 
 enum DltRecordType {
-  UNKNOWN = 0;
-  SERVICE = 1;
-  DEVICE = 2;
-  SLICE = 3;
+  RECORD_UNSET = 0;
+  UNKNOWN = 1;
+  SERVICE = 2;
+  DEVICE = 3;
+  SLICE = 4;
 }
 
 message DltRecord {