diff --git a/packages/cactus-cmd-socketio-server/package.json b/packages/cactus-cmd-socketio-server/package.json
index 7cf35a09e74..0e40a0d23df 100644
--- a/packages/cactus-cmd-socketio-server/package.json
+++ b/packages/cactus-cmd-socketio-server/package.json
@@ -42,7 +42,8 @@
     "@types/escape-html": "1.0.1",
     "@types/http-errors": "1.6.3",
     "@types/morgan": "1.9.1",
-    "@types/shelljs": "^0.8.11",
+    "@types/shelljs": "0.8.11",
+    "http-terminator": "3.2.0",
     "ts-node": "8.9.1"
   },
   "publishConfig": {
diff --git a/packages/cactus-cmd-socketio-server/src/main/typescript/business-logic-plugin/BLP_config.ts b/packages/cactus-cmd-socketio-server/src/main/typescript/business-logic-plugin/BLP_config.ts
index c44e36e4a67..2eb3dbf3fb3 100644
--- a/packages/cactus-cmd-socketio-server/src/main/typescript/business-logic-plugin/BLP_config.ts
+++ b/packages/cactus-cmd-socketio-server/src/main/typescript/business-logic-plugin/BLP_config.ts
@@ -7,17 +7,24 @@
 
 import { BusinessLogicPlugin } from "./BusinessLogicPlugin";
 
-let _blp: BusinessLogicPlugin | null = null;
+// Singleton of BLPs
+let _blpMapping = new Map<string, BusinessLogicPlugin>();
 
 export function getTargetBLPInstance(
   businessLogicID: string,
 ): BusinessLogicPlugin | null {
-  return _blp;
+  return _blpMapping.get(businessLogicID) ?? null;
 }
 
 export function setTargetBLPInstance(
   businessLogicID: string,
   blp: BusinessLogicPlugin,
 ) {
-  _blp = blp;
-}
\ No newline at end of file
+  _blpMapping.set(businessLogicID, blp);
+}
+
+export function deleteTargetBLPInstance(
+  businessLogicID: string,
+) {
+  return _blpMapping.delete(businessLogicID);
+}
diff --git a/packages/cactus-cmd-socketio-server/src/main/typescript/business-logic-plugin/BusinessLogicBase.ts b/packages/cactus-cmd-socketio-server/src/main/typescript/business-logic-plugin/BusinessLogicBase.ts
index 4e3a21210da..1727958610e 100644
--- a/packages/cactus-cmd-socketio-server/src/main/typescript/business-logic-plugin/BusinessLogicBase.ts
+++ b/packages/cactus-cmd-socketio-server/src/main/typescript/business-logic-plugin/BusinessLogicBase.ts
@@ -83,8 +83,10 @@ export class BusinessLogicBase implements BusinessLogicPlugin {
     return null;
   }
 
+  // This function is optional in setup with single BLP,
+  // that's why value true is returned (to indicate that given Tx always belong to this BLP)
   hasTxIDInTransactions(txID: string): boolean {
     // NOTE: This method implements the BisinessLogcPlugin operation(* Override by subclass)
-    return false;
+    return true;
   }
 }
diff --git a/packages/cactus-cmd-socketio-server/src/main/typescript/routing-interface/CactusSocketIOServer.ts b/packages/cactus-cmd-socketio-server/src/main/typescript/routing-interface/CactusSocketIOServer.ts
index 2fed089ecda..f4f3166f930 100644
--- a/packages/cactus-cmd-socketio-server/src/main/typescript/routing-interface/CactusSocketIOServer.ts
+++ b/packages/cactus-cmd-socketio-server/src/main/typescript/routing-interface/CactusSocketIOServer.ts
@@ -29,10 +29,17 @@ export type BLPConfig = {
   plugin: BusinessLogicPlugin;
 };
 
-export function startCactusSocketIOServer(blp?: BLPConfig) {
+export function startCactusSocketIOServer(blp?: BLPConfig | BLPConfig[], onListening?: () => void) {
   if (blp) {
-    logger.info("Using BLP with id =", blp.id);
-    setTargetBLPInstance(blp.id, blp.plugin);
+      // Support both single and multiple BLPs
+      if(!Array.isArray(blp)) {
+        blp = [blp];
+      }
+
+      blp.forEach((cfg) => {
+        logger.info("Using BLP with id =", cfg.id);
+        setTargetBLPInstance(cfg.id, cfg.plugin);
+      });
   }
 
   runExpressApp();
@@ -85,15 +92,16 @@ export function startCactusSocketIOServer(blp?: BLPConfig) {
   /**
    * Event listener for HTTP server "listening" event.
    */
-
-  function onListening(): void {
-    const addr = server.address();
-    if (addr) {
-      const bind =
-        typeof addr === "string" ? "pipe " + addr : "port " + addr.port;
-      debugModule("Listening on " + bind);
-    } else {
-      throw new Error("Could not get server address!");
+  if (!onListening) {
+    onListening = () => {
+      const addr = server.address();
+      if (addr) {
+        const bind =
+          typeof addr === "string" ? "pipe " + addr : "port " + addr.port;
+        debugModule("Listening on " + bind);
+      } else {
+        throw new Error("Could not get server address!");
+      }
     }
   }
 
diff --git a/packages/cactus-cmd-socketio-server/src/main/typescript/routing-interface/TransactionManagement.ts b/packages/cactus-cmd-socketio-server/src/main/typescript/routing-interface/TransactionManagement.ts
index e879ed6d83c..ced36df6226 100644
--- a/packages/cactus-cmd-socketio-server/src/main/typescript/routing-interface/TransactionManagement.ts
+++ b/packages/cactus-cmd-socketio-server/src/main/typescript/routing-interface/TransactionManagement.ts
@@ -8,15 +8,10 @@
 import { Request } from "express";
 import { BusinessLogicPlugin } from "../business-logic-plugin/BusinessLogicPlugin";
 import { BLPRegistry } from "./util/BLPRegistry";
-import { LPInfoHolder } from "./util/LPInfoHolder";
-import { json2str } from "../verifier/DriverCommon";
-import { Verifier } from "../verifier/Verifier";
 import { IVerifierEventListener, LedgerEvent } from "../verifier/LedgerPlugin";
 import { getTargetBLPInstance } from "../business-logic-plugin/BLP_config";
 import { ConfigUtil } from "./util/ConfigUtil";
 
-const fs = require("fs");
-const path = require("path");
 const config: any = ConfigUtil.getConfig();
 import { getLogger } from "log4js";
 const moduleName = "TransactionManagement";
@@ -117,22 +112,20 @@ export class TransactionManagement implements IVerifierEventListener {
 
     // object judgment
     let result: {} = {};
-    if (businessLogicID === "h40Q9eMD") {
-      const blp = getTargetBLPInstance(businessLogicID);
-      if (blp === null) {
-        logger.warn(
-          `##startBusinessLogic(): not found BusinessLogicPlugin. businessLogicID: ${businessLogicID}`,
-        );
-        return undefined;
-      }
+    const blp = getTargetBLPInstance(businessLogicID);
+    if (blp === null) {
+      logger.warn(
+        `##startBusinessLogic(): not found BusinessLogicPlugin. businessLogicID: ${businessLogicID}`,
+      );
+      return undefined;
+    }
 
-      logger.debug("created instance");
+    logger.debug("created instance");
 
-      // Set business logic config
-      logger.debug(`meterParams = ${req.body.meterParams}`);
-      result = blp.setConfig(req.body.meterParams);
-      logger.debug("set business logic config");
-    }
+    // Set business logic config
+    logger.debug(`meterParams = ${req.body.meterParams}`);
+    result = blp.setConfig(req.body.meterParams);
+    logger.debug("set business logic config");
 
     return result;
   }
@@ -271,12 +264,12 @@ export class TransactionManagement implements IVerifierEventListener {
         continue;
       }
 
-      //            if (blp.hasTxIDInTransactions(txID)) {
-      logger.debug(
-        `####getBLPInstanceFromTxID(): found!, businessLogicID: ${businessLogicID}`,
-      );
-      return blp;
-      //            }
+      if (blp.hasTxIDInTransactions(txID)) {
+        logger.debug(
+          `####getBLPInstanceFromTxID(): found!, businessLogicID: ${businessLogicID}`,
+        );
+        return blp;
+      }
     }
 
     // not found.
diff --git a/packages/cactus-cmd-socketio-server/src/test/typescript/unit/Verifier.test.ts b/packages/cactus-cmd-socketio-server/src/test/typescript/unit/Verifier.test.ts
index 5cdc1d9d7ca..655472285e8 100644
--- a/packages/cactus-cmd-socketio-server/src/test/typescript/unit/Verifier.test.ts
+++ b/packages/cactus-cmd-socketio-server/src/test/typescript/unit/Verifier.test.ts
@@ -63,7 +63,7 @@ import {
   LogLevelDesc,
 } from "@hyperledger/cactus-common";
 
-const logLevel: LogLevelDesc = "error";
+const logLevel: LogLevelDesc = "info";
 const log: Logger = LoggerProvider.getOrCreate({
   label: "test-cmd-socketio-verifier",
   level: logLevel,
diff --git a/packages/cactus-cmd-socketio-server/src/test/typescript/unit/VerifierAuthentication.test.ts b/packages/cactus-cmd-socketio-server/src/test/typescript/unit/VerifierAuthentication.test.ts
index 2273f267945..20c438b5a39 100644
--- a/packages/cactus-cmd-socketio-server/src/test/typescript/unit/VerifierAuthentication.test.ts
+++ b/packages/cactus-cmd-socketio-server/src/test/typescript/unit/VerifierAuthentication.test.ts
@@ -20,7 +20,7 @@ import {
   LogLevelDesc,
 } from "@hyperledger/cactus-common";
 
-const logLevel: LogLevelDesc = "error";
+const logLevel: LogLevelDesc = "info";
 const log: Logger = LoggerProvider.getOrCreate({
   label: "test-cmd-socketio-verifier",
   level: logLevel,
diff --git a/packages/cactus-cmd-socketio-server/src/test/typescript/unit/VerifierFactory.test.ts b/packages/cactus-cmd-socketio-server/src/test/typescript/unit/VerifierFactory.test.ts
index 178f65c1c1d..641588289e0 100644
--- a/packages/cactus-cmd-socketio-server/src/test/typescript/unit/VerifierFactory.test.ts
+++ b/packages/cactus-cmd-socketio-server/src/test/typescript/unit/VerifierFactory.test.ts
@@ -19,7 +19,7 @@ import {
   LogLevelDesc,
 } from "@hyperledger/cactus-common";
 
-const logLevel: LogLevelDesc = "error";
+const logLevel: LogLevelDesc = "info";
 const log: Logger = LoggerProvider.getOrCreate({
   label: "test-cmd-socketio-verifier",
   level: logLevel,
diff --git a/packages/cactus-cmd-socketio-server/src/test/typescript/unit/cmd-socketio-blp-plugin.test.ts b/packages/cactus-cmd-socketio-server/src/test/typescript/unit/cmd-socketio-blp-plugin.test.ts
new file mode 100644
index 00000000000..fd600748c87
--- /dev/null
+++ b/packages/cactus-cmd-socketio-server/src/test/typescript/unit/cmd-socketio-blp-plugin.test.ts
@@ -0,0 +1,399 @@
+/**
+ * Tests to check the BLP framework functions included in this package.
+ * Client applications can use this framework when developing own client side apps (BLP).
+ */
+
+// Contants
+const testLogLevel: LogLevelDesc = "info";
+const sutLogLevel: LogLevelDesc = "info";
+const setupTimeout = 1000 * 60; // 1 minute timeout for setup
+const firstServiceName = "firstBLPServiceID";
+const secondServiceName = "secondBLPServiceID";
+
+/**
+ * Mock cmd-socketio-server configuration that will be used by the test.
+ * Normally, this would come from parsing config files in `/etc/cactus/`
+ */
+const mockAppConfig = {
+  blpRegistry: [
+    {
+      businessLogicID: firstServiceName,
+      validatorID: [],
+    },
+    {
+      businessLogicID: secondServiceName,
+      validatorID: [],
+    },
+  ],
+  logLevel: sutLogLevel,
+  applicationHostInfo: { hostName: "0.0.0.0", hostPort: 0 },
+  socketOptions: {
+    rejectUnauthorized: false,
+    reconnection: false,
+    timeout: 20000,
+  },
+  verifier: { maxCounterRequestID: 100, syncFunctionTimeoutMillisecond: 5000 },
+  appRouters: [],
+};
+
+// Must be mocked before loading cactus-cmd-socketio-server
+import * as ConfigUtil from "../../../main/typescript/routing-interface/util/ConfigUtil";
+jest.mock("../../../main/typescript/routing-interface/util/ConfigUtil");
+(ConfigUtil as any)["__configMock"] = mockAppConfig;
+
+jest.mock("fs");
+
+import { BusinessLogicBase } from "../../../main/typescript/business-logic-plugin/BusinessLogicBase";
+import { LedgerEvent } from "../../../main/typescript/verifier/LedgerPlugin";
+import { TransactionManagement } from "../../../main/typescript/routing-interface/TransactionManagement";
+import { startCactusSocketIOServer } from "../../../main/typescript/routing-interface/CactusSocketIOServer";
+
+import {
+  Logger,
+  LoggerProvider,
+  LogLevelDesc,
+} from "@hyperledger/cactus-common";
+
+import { createHttpTerminator } from "http-terminator";
+import { Request } from "express";
+import http from "http";
+import "jest-extended";
+
+// Unit Test logger setup
+const log: Logger = LoggerProvider.getOrCreate({
+  label: "cmd-socketio-blp-plugin.test",
+  level: testLogLevel,
+});
+
+//////////////////////////////
+// Mock BLP Class
+//////////////////////////////
+
+/**
+ * Returns predefined responses for certain operations that can be then validated in by the test suite.
+ * Performs some validations of the input parameters as well.
+ */
+export class TestBLPService extends BusinessLogicBase {
+  blpClassName: string;
+
+  /**
+   * Mocked value of ledger transaction ID that belongs to this BLP logic.
+   * Assume it was received from another call to the ledger (`sendTransaction()` or something similar).
+   */
+  txName: string;
+
+  /**
+   * List of tradeID generated by the TransactionManagement component.
+   * Should correspond to each `startBusinessLogic()` call.
+   */
+  transactions: string[] = [];
+
+  /**
+   * List of received event IDs by `onEvent()` function.
+   */
+  receivedEvents: string[] = [];
+
+  constructor(public businessLogicID: string) {
+    super();
+    this.blpClassName = this.constructor.name;
+    this.txName = `${businessLogicID}_TxID1`;
+    log.debug(`${this.blpClassName} of ${businessLogicID} created.`);
+  }
+
+  /**
+   * Called after receiving startBusinessLogic request in TransactionManagement.
+   * Should register new trade start.
+   *
+   * @param req HTTP request that triggered this operation.
+   * @param businessLogicID should be equal to this plugin ID.
+   * @param tradeID New trade ID generated by TransactionManagement.
+   */
+  startTransaction(req: Request, businessLogicID: string, tradeID: string) {
+    log.info(
+      `${this.blpClassName}: [startTransaction] businessLogicID: ${businessLogicID}, tradeID: ${tradeID}`,
+    );
+    expect(req).toBeTruthy();
+    expect(businessLogicID).toBeTruthy();
+    expect(businessLogicID).toEqual(this.businessLogicID);
+    expect(tradeID).toBeTruthy();
+    this.transactions.push(tradeID);
+    log.debug(
+      "Added new transaction (trade). Current transactions:",
+      this.transactions,
+    );
+  }
+
+  /**
+   * Should return status of the trade given in argument.
+   *
+   * @param tradeID Status we want to get.
+   * @returns response: true if routed to correct BLP, businessLogicID: this BLP id
+   */
+  getOperationStatus(tradeID: string) {
+    log.info(
+      `${this.blpClassName}: [getOperationStatus] businessLogicID: ${this.businessLogicID}, tradeID: ${tradeID}`,
+    );
+    expect(tradeID).toBeTruthy();
+    const isIncluded = this.transactions.includes(tradeID);
+    expect(isIncluded).toBeTrue();
+    return { response: isIncluded, businessLogicID: this.businessLogicID };
+  }
+
+  /**
+   * Should be used for BLP logic setup by the client.
+   * @param meterParams some BLP options.
+   * @returns meterParams: received in input, businessLogicID: this BLP id
+   */
+  setConfig(meterParams: string[]): any {
+    log.info(
+      `${this.blpClassName}: [setConfig] businessLogicID: ${this.businessLogicID}, meterParams: ${meterParams}`,
+    );
+    expect(meterParams).toBeTruthy();
+    return { meterParams, businessLogicID: this.businessLogicID };
+  }
+
+  /**
+   * Used to receive events from the verifier. Events should be routed correctly based on responses
+   * from other methods in this BLP. Pushes new event to `receivedEvents`.
+   *
+   * Current flow of the event while being routed to the BLP (implemented in TransactionManagement,
+   * but described here for test setup clarity):
+   * 1. `getEventDataNum(ledgerEvent)` is called for each registered BLP, until one of them returns event count different from `0`.
+   * 2. `getTxIDFromEvent(ledgerEvent, targetIndex)` is called for each registered BLP, until one of them returns
+   *  transaction id different from `null`.
+   * 3. `hasTxIDInTransactions(txID)` is called for each registered BLP, until one of them confirms it's
+   *  an owner of given transaction. For single-BLP, this function can be ommited and will return true (for backward compatibility).
+   * 4.  `onEvent(ledgerEvent, targetIndex)` - this function is called.
+   *
+   * @param ledgerEvent Event that belong to this BLP.
+   * @param targetIndex Index of the event (starting from `0`).
+   */
+  onEvent(ledgerEvent: LedgerEvent, targetIndex: number): void {
+    log.info(
+      `${this.blpClassName}: [onEvent] businessLogicID: ${this.businessLogicID}, ledgerEvent: ${ledgerEvent}, targetIndex: ${targetIndex}`,
+    );
+    expect(ledgerEvent).toBeTruthy();
+    expect(targetIndex).toEqual(0);
+    expect(ledgerEvent.data).toEqual(this.businessLogicID);
+    this.receivedEvents.push(ledgerEvent.id);
+    log.debug("Added new event. Current event IDs:", this.receivedEvents);
+  }
+
+  /**
+   * Should return number of events from given LedgerEvent.
+   * This test implementation always returns 1.
+   *
+   * @returns 1
+   */
+  getEventDataNum() {
+    log.info(
+      `${this.blpClassName}: [getEventDataNum] businessLogicID: ${this.businessLogicID}`,
+    );
+    return 1;
+  }
+
+  /**
+   * Should read ledger transaction id from given LedgerEvent.
+   * It returns either predefined `this.txName` if event matches this BLP, or `null` if not.
+   * @param ledgerEvent
+   * @returns
+   */
+  getTxIDFromEvent(ledgerEvent: LedgerEvent<any>) {
+    log.info(
+      `${this.blpClassName}: [getTxIDFromEvent] businessLogicID: ${this.businessLogicID}, ledgerEvent: ${ledgerEvent}`,
+    );
+
+    if (ledgerEvent.data === this.businessLogicID) {
+      log.debug("Event matches, return txName");
+      return this.txName;
+    } else {
+      return null;
+    }
+  }
+
+  /**
+   * Should return true if given ledger transaction belongs to this BLP.
+   *
+   * @param txID ledger transaction ID.
+   * @returns `true` if given txID matches predefined `this.txName`, `false` otherwise.
+   */
+  hasTxIDInTransactions(txID: string) {
+    return txID === this.txName;
+  }
+}
+
+//////////////////////////////
+// Test Suite
+//////////////////////////////
+
+describe("Test multiple Bussiness Logic Plugins (BLP) running as a single service", () => {
+  const firstService = new TestBLPService(firstServiceName);
+  const secondService = new TestBLPService(secondServiceName);
+  let transactionManagement: TransactionManagement;
+  let cmdServer: http.Server;
+
+  //////////////////////////////
+  // Setup
+  //////////////////////////////
+
+  beforeAll((done) => {
+    transactionManagement = new TransactionManagement();
+
+    const blpConfig = [
+      {
+        id: firstServiceName,
+        plugin: firstService,
+      },
+      {
+        id: secondServiceName,
+        plugin: secondService,
+      },
+    ];
+    log.info(
+      "Create CMD SocketIO Server with the following BLP config:",
+      blpConfig,
+    );
+
+    cmdServer = startCactusSocketIOServer(blpConfig, () => {
+      expect(cmdServer).toBeTruthy();
+      const addr = cmdServer.address();
+      expect(addr).toBeTruthy();
+      const bind =
+        typeof addr === "string" ? "pipe " + addr : "port " + addr!.port;
+      log.info("Test CMD SocketIO Server started at", bind);
+      done();
+    });
+  }, setupTimeout);
+
+  afterAll(async () => {
+    if (cmdServer) {
+      log.info("Stop CMD SocketIO Server");
+      const httpTerminator = createHttpTerminator({
+        server: cmdServer,
+      });
+      await httpTerminator.terminate();
+    }
+
+    log.info("Cleanup done.");
+  }, setupTimeout);
+
+  //////////////////////////////
+  // Tests
+  //////////////////////////////
+
+  test("Start bussiness logic creates new trade and calls correct BLP", () => {
+    // First BLP
+    const reqMockFirst = {
+      body: {
+        businessLogicID: firstServiceName,
+      },
+    };
+    const firstTradeID = transactionManagement.startBusinessLogic(
+      reqMockFirst as any,
+    );
+    expect(firstTradeID).toBeTruthy();
+    expect(firstService.transactions).toInclude(firstTradeID as string);
+
+    // Second BLP
+    const reqMockSecond = {
+      body: {
+        businessLogicID: secondServiceName,
+      },
+    };
+    const secondTradeID = transactionManagement.startBusinessLogic(
+      reqMockSecond as any,
+    );
+    expect(secondTradeID).toBeTruthy();
+    expect(secondService.transactions).toInclude(secondTradeID as string);
+  });
+
+  test("Calling getOperationStatus gets status from correct BLP", () => {
+    // First BLP
+    const reqMockFirst = {
+      body: {
+        businessLogicID: firstServiceName,
+      },
+    };
+    const firstTradeID = transactionManagement.startBusinessLogic(
+      reqMockFirst as any,
+    ) as any;
+    const firstTradeStatus = transactionManagement.getOperationStatus(
+      firstTradeID,
+    ) as any;
+    expect(firstTradeStatus).toBeTruthy();
+    expect(firstTradeStatus.businessLogicID).toEqual(firstServiceName);
+    expect(firstTradeStatus.response).toBeTrue();
+
+    // Second BLP
+    const reqMockSecond = {
+      body: {
+        businessLogicID: secondServiceName,
+      },
+    };
+    const secondTradeID = transactionManagement.startBusinessLogic(
+      reqMockSecond as any,
+    ) as any;
+    const secondTradeStatus = transactionManagement.getOperationStatus(
+      secondTradeID,
+    ) as any;
+    expect(secondTradeStatus).toBeTruthy();
+    expect(secondTradeStatus.businessLogicID).toEqual(secondServiceName);
+    expect(secondTradeStatus.response).toBeTrue();
+  });
+
+  test("Calling setBusinessLogicConfig sends request to correct BLP", () => {
+    // First BLP
+    const firstMeterParams = ["a", "b", "c"];
+    const reqMockFirst = {
+      body: {
+        businessLogicID: firstServiceName,
+        meterParams: firstMeterParams,
+      },
+    };
+    const firstSetResponse = transactionManagement.setBusinessLogicConfig(
+      reqMockFirst as any,
+    ) as any;
+    expect(firstSetResponse).toBeTruthy();
+    expect(firstSetResponse.businessLogicID).toEqual(firstServiceName);
+    expect(firstSetResponse.meterParams).toEqual(firstMeterParams);
+
+    // Second BLP
+    const secondMeterParams = ["x", "y", "z"];
+    const reqMockSecond = {
+      body: {
+        businessLogicID: secondServiceName,
+        meterParams: secondMeterParams,
+      },
+    };
+    const secondSetResponse = transactionManagement.setBusinessLogicConfig(
+      reqMockSecond as any,
+    ) as any;
+    expect(secondSetResponse).toBeTruthy();
+    expect(secondSetResponse.businessLogicID).toEqual(secondServiceName);
+    expect(secondSetResponse.meterParams).toEqual(secondMeterParams);
+  });
+
+  test("Events are routed to the correct BLP", () => {
+    // First BLP
+    const firstEventId = "someEventForFirstService";
+    const firstLedgerEvent = {
+      id: firstEventId,
+      verifierId: "someVerifier",
+      data: firstServiceName,
+    };
+    transactionManagement.onEvent(firstLedgerEvent);
+    expect(firstService.receivedEvents.length).toBeGreaterThan(0);
+    expect(firstService.receivedEvents[0]).toEqual(firstEventId);
+
+    // Second BLP
+    const secondEventId = "someEventForSecondService";
+    const secondLedgerEvent = {
+      id: secondEventId,
+      verifierId: "someVerifier",
+      data: secondServiceName,
+    };
+    transactionManagement.onEvent(secondLedgerEvent);
+    expect(secondService.receivedEvents.length).toBeGreaterThan(0);
+    expect(secondService.receivedEvents[0]).toEqual(secondEventId);
+  });
+});
diff --git a/packages/cactus-cmd-socketio-server/src/test/typescript/unit/validator-authentication.test.ts b/packages/cactus-cmd-socketio-server/src/test/typescript/unit/validator-authentication.test.ts
index 51265161c11..59f44de13b2 100644
--- a/packages/cactus-cmd-socketio-server/src/test/typescript/unit/validator-authentication.test.ts
+++ b/packages/cactus-cmd-socketio-server/src/test/typescript/unit/validator-authentication.test.ts
@@ -17,7 +17,7 @@ import {
   LogLevelDesc,
 } from "@hyperledger/cactus-common";
 
-const logLevel: LogLevelDesc = "error";
+const logLevel: LogLevelDesc = "info";
 const log: Logger = LoggerProvider.getOrCreate({
   label: "test-cmd-socketio-verifier",
   level: logLevel,
@@ -36,7 +36,7 @@ const mockConfig = {
     certValue: publicKey,
     jwtAlgo: "ES256",
   },
-  logLevel: "info",
+  logLevel: logLevel,
 };
 
 jest.mock("config");
diff --git a/packages/cactus-plugin-ledger-connector-go-ethereum-socketio/package.json b/packages/cactus-plugin-ledger-connector-go-ethereum-socketio/package.json
index 5128820086c..e287feb7f33 100644
--- a/packages/cactus-plugin-ledger-connector-go-ethereum-socketio/package.json
+++ b/packages/cactus-plugin-ledger-connector-go-ethereum-socketio/package.json
@@ -28,7 +28,8 @@
     "serve-favicon": "2.4.5",
     "shelljs": "0.8.5",
     "socket.io": "4.4.1",
-    "web3": "1.8.1"
+    "web3": "1.8.1",
+    "http-errors": "1.6.3"
   },
   "devDependencies": {
     "@hyperledger/cactus-test-tooling": "1.1.2",
diff --git a/yarn.lock b/yarn.lock
index 8a612766d07..57677348463 100644
--- a/yarn.lock
+++ b/yarn.lock
@@ -5617,7 +5617,7 @@ ajv@8.9.0:
     require-from-string "^2.0.2"
     uri-js "^4.2.2"
 
-ajv@^6.10.0, ajv@^6.12.0, ajv@^6.12.3, ajv@^6.12.4, ajv@^6.12.5, ajv@^6.12.6:
+ajv@^6.10.0, ajv@^6.11.0, ajv@^6.12.0, ajv@^6.12.3, ajv@^6.12.4, ajv@^6.12.5, ajv@^6.12.6:
   version "6.12.6"
   resolved "https://registry.yarnpkg.com/ajv/-/ajv-6.12.6.tgz#baf5a62e802b07d977034586f8c3baf5adf26df4"
   integrity sha512-j3fVLgvTo527anyYyJOGTYJbG+vnnQYvE0m5mmkc1TK+nxAppkCLMIL0aZ4dblVCNoGShhm+kzE4ZUykBoMg4g==
@@ -6820,7 +6820,7 @@ boolbase@^1.0.0, boolbase@~1.0.0:
   resolved "https://registry.yarnpkg.com/boolbase/-/boolbase-1.0.0.tgz#68dff5fbe60c51eb37725ea9e3ed310dcc1e776e"
   integrity sha1-aN/1++YMUes3cl6p4+0xDcwed24=
 
-boolean@^3.0.1:
+boolean@^3.0.1, boolean@^3.1.4:
   version "3.2.0"
   resolved "https://registry.yarnpkg.com/boolean/-/boolean-3.2.0.tgz#9e5294af4e98314494cbb17979fa54ca159f116b"
   integrity sha512-d0II/GO9uf9lfUHH2BQsjxzRJZBdsjgsBiW4BvhWk/3qoKwQFjIDVN19PfX8F2D/r9PCMTtLWjYVCFrpeYUzsw==
@@ -9206,6 +9206,11 @@ del@^6.0.0:
     rimraf "^3.0.2"
     slash "^3.0.0"
 
+delay@^5.0.0:
+  version "5.0.0"
+  resolved "https://registry.yarnpkg.com/delay/-/delay-5.0.0.tgz#137045ef1b96e5071060dd5be60bf9334436bd1d"
+  integrity sha512-ReEBKkIfe4ya47wlPYf/gu5ib6yUG0/Aez0JQZQz94kiWtRQvZIQbTiehsnwHvLSWJnQdhVeqYue7Id1dKr0qw==
+
 delayed-stream@~1.0.0:
   version "1.0.0"
   resolved "https://registry.yarnpkg.com/delayed-stream/-/delayed-stream-1.0.0.tgz#df3ae199acadfb7d440aaae0b29e2272b24ec619"
@@ -11135,12 +11140,29 @@ fast-json-stable-stringify@2.1.0, fast-json-stable-stringify@2.x, fast-json-stab
   resolved "https://registry.yarnpkg.com/fast-json-stable-stringify/-/fast-json-stable-stringify-2.1.0.tgz#874bf69c6f404c2b5d99c481341399fd55892633"
   integrity sha512-lhd/wF+Lk98HZoTCtlVraHtfh5XYijIjalXck7saUtuanSDyLMxnHhSXEDJqHxD7msR8D0uCmqlkwjCV8xvwHw==
 
+fast-json-stringify@^2.7.10:
+  version "2.7.13"
+  resolved "https://registry.yarnpkg.com/fast-json-stringify/-/fast-json-stringify-2.7.13.tgz#277aa86c2acba4d9851bd6108ed657aa327ed8c0"
+  integrity sha512-ar+hQ4+OIurUGjSJD1anvYSDcUflywhKjfxnsW4TBTD7+u0tJufv6DKRWoQk3vI6YBOWMoz0TQtfbe7dxbQmvA==
+  dependencies:
+    ajv "^6.11.0"
+    deepmerge "^4.2.2"
+    rfdc "^1.2.0"
+    string-similarity "^4.0.1"
+
 fast-levenshtein@^2.0.6, fast-levenshtein@~2.0.6:
   version "2.0.6"
   resolved "https://registry.yarnpkg.com/fast-levenshtein/-/fast-levenshtein-2.0.6.tgz#3d8a5c66883a16a30ca8643e851f19baa7797917"
   integrity sha1-PYpcZog6FqMMqGQ+hR8Zuqd5eRc=
 
-fast-safe-stringify@2.1.1:
+fast-printf@^1.6.9:
+  version "1.6.9"
+  resolved "https://registry.yarnpkg.com/fast-printf/-/fast-printf-1.6.9.tgz#212f56570d2dc8ccdd057ee93d50dd414d07d676"
+  integrity sha512-FChq8hbz65WMj4rstcQsFB0O7Cy++nmbNfLYnD9cYv2cRn8EG6k/MGn9kO/tjO66t09DLDugj3yL+V2o6Qftrg==
+  dependencies:
+    boolean "^3.1.4"
+
+fast-safe-stringify@2.1.1, fast-safe-stringify@^2.1.1:
   version "2.1.1"
   resolved "https://registry.yarnpkg.com/fast-safe-stringify/-/fast-safe-stringify-2.1.1.tgz#c406a83b6e70d9e35ce3b30a81141df30aeba884"
   integrity sha512-W+KJc2dmILlPplD/H4K9l9LcAHAfPtP6BY84uVLXQ6Evcz9Lcg33Y2z1IVblT6xdY54PXYVHEv+0Wpq8Io6zkA==
@@ -11977,6 +11999,13 @@ globalthis@^1.0.1:
   dependencies:
     define-properties "^1.1.3"
 
+globalthis@^1.0.2:
+  version "1.0.3"
+  resolved "https://registry.yarnpkg.com/globalthis/-/globalthis-1.0.3.tgz#5852882a52b80dc301b0660273e1ed082f0b6ccf"
+  integrity sha512-sFdI5LyBiNTHjRd7cGPWapiHWMOXKyuBNX/cWJ3NfzrZQVa8GI/8cofCl74AOVqq9W5kNmguTIzJ/1s2gyI9wA==
+  dependencies:
+    define-properties "^1.1.3"
+
 globby@10.0.0:
   version "10.0.0"
   resolved "https://registry.yarnpkg.com/globby/-/globby-10.0.0.tgz#abfcd0630037ae174a88590132c2f6804e291072"
@@ -12729,6 +12758,16 @@ http-status-codes@2.1.4:
   resolved "https://registry.yarnpkg.com/http-status-codes/-/http-status-codes-2.1.4.tgz#453d99b4bd9424254c4f6a9a3a03715923052798"
   integrity sha512-MZVIsLKGVOVE1KEnldppe6Ij+vmemMuApDfjhVSLzyYP+td0bREEYyAoIw9yFePoBXManCuBqmiNP5FqJS5Xkg==
 
+http-terminator@3.2.0:
+  version "3.2.0"
+  resolved "https://registry.yarnpkg.com/http-terminator/-/http-terminator-3.2.0.tgz#bc158d2694b733ca4fbf22a35065a81a609fb3e9"
+  integrity sha512-JLjck1EzPaWjsmIf8bziM3p9fgR1Y3JoUKAkyYEbZmFrIvJM6I8vVJfBGWlEtV9IWOvzNnaTtjuwZeBY2kwB4g==
+  dependencies:
+    delay "^5.0.0"
+    p-wait-for "^3.2.0"
+    roarr "^7.0.4"
+    type-fest "^2.3.3"
+
 http2-wrapper@^1.0.0-beta.5.2:
   version "1.0.3"
   resolved "https://registry.yarnpkg.com/http2-wrapper/-/http2-wrapper-1.0.3.tgz#b8f55e0c1f25d4ebd08b3b0c2c079f9590800b3d"
@@ -17732,7 +17771,7 @@ p-timeout@^1.1.1:
   dependencies:
     p-finally "^1.0.0"
 
-p-timeout@^3.1.0, p-timeout@^3.2.0:
+p-timeout@^3.0.0, p-timeout@^3.1.0, p-timeout@^3.2.0:
   version "3.2.0"
   resolved "https://registry.yarnpkg.com/p-timeout/-/p-timeout-3.2.0.tgz#c7e17abc971d2a7962ef83626b35d635acf23dfe"
   integrity sha512-rhIwUycgwwKcP9yTOOFK/AKsAopjjCakVqLHePO3CC6Mir1Z99xT+R63jZxAT5lFZLa2inS5h+ZS2GvR99/FBg==
@@ -17749,6 +17788,13 @@ p-try@^2.0.0:
   resolved "https://registry.yarnpkg.com/p-try/-/p-try-2.2.0.tgz#cb2868540e313d61de58fafbe35ce9004d5540e6"
   integrity sha512-R4nPAVTAU0B9D35/Gk3uJf/7XYbQcyohSKdvAxIRSNghFl4e71hVoGnBNQz9cWaXxO2I10KTC+3jMdvvoKw6dQ==
 
+p-wait-for@^3.2.0:
+  version "3.2.0"
+  resolved "https://registry.yarnpkg.com/p-wait-for/-/p-wait-for-3.2.0.tgz#640429bcabf3b0dd9f492c31539c5718cb6a3f1f"
+  integrity sha512-wpgERjNkLrBiFmkMEjuZJEWKKDrNfHCKA1OhyN1wg1FrLkULbviEy6py1AyJUgZ72YWFbZ38FIpnqvVqAlDUwA==
+  dependencies:
+    p-timeout "^3.0.0"
+
 package-hash@^4.0.0:
   version "4.0.0"
   resolved "https://registry.yarnpkg.com/package-hash/-/package-hash-4.0.0.tgz#3537f654665ec3cc38827387fc904c163c54f506"
@@ -19622,7 +19668,7 @@ reusify@^1.0.4:
   resolved "https://registry.yarnpkg.com/reusify/-/reusify-1.0.4.tgz#90da382b1e126efc02146e90845a88db12925d76"
   integrity sha512-U9nH88a3fc/ekCF1l0/UP1IosiuIjyTh7hBvXVMHYgVcfGvt897Xguj2UOLDeI5BG2m7/uwyaLVT6fbtCwTyzw==
 
-rfdc@^1.3.0:
+rfdc@^1.2.0, rfdc@^1.3.0:
   version "1.3.0"
   resolved "https://registry.yarnpkg.com/rfdc/-/rfdc-1.3.0.tgz#d0b7c441ab2720d05dc4cf26e01c89631d9da08b"
   integrity sha512-V2hovdzFbOi77/WajaSMXk2OLm+xNIeQdMMuB7icj7bk6zi2F8GGAxigcnDFpJHbNyNcgyJDiP+8nOrY5cZGrA==
@@ -19682,6 +19728,18 @@ roarr@^2.15.3:
     semver-compare "^1.0.0"
     sprintf-js "^1.1.2"
 
+roarr@^7.0.4:
+  version "7.11.0"
+  resolved "https://registry.yarnpkg.com/roarr/-/roarr-7.11.0.tgz#010a0ef39bbb8317fd28fcfb337cb8a3e56f3de2"
+  integrity sha512-DKiMaEYHoOZ0JyD4Ohr5KRnqybQ162s3ZL/WNO9oy6EUszYvpp0eLYJErc/U4NI96HYnHsbROhFaH4LYuJPnDg==
+  dependencies:
+    boolean "^3.1.4"
+    fast-json-stringify "^2.7.10"
+    fast-printf "^1.6.9"
+    fast-safe-stringify "^2.1.1"
+    globalthis "^1.0.2"
+    semver-compare "^1.0.0"
+
 run-async@^2.4.0:
   version "2.4.1"
   resolved "https://registry.yarnpkg.com/run-async/-/run-async-2.4.1.tgz#8440eccf99ea3e70bd409d49aab88e10c189a455"
@@ -21027,6 +21085,11 @@ string-length@^4.0.1:
     char-regex "^1.0.2"
     strip-ansi "^6.0.0"
 
+string-similarity@^4.0.1:
+  version "4.0.4"
+  resolved "https://registry.yarnpkg.com/string-similarity/-/string-similarity-4.0.4.tgz#42d01ab0b34660ea8a018da8f56a3309bb8b2a5b"
+  integrity sha512-/q/8Q4Bl4ZKAPjj8WerIBJWALKkaPRfrvhfF8k/B23i4nzrlRj2/go1m90In7nG/3XDSbOo0+pu6RvCTM9RGMQ==
+
 string-width@^1.0.1:
   version "1.0.2"
   resolved "https://registry.yarnpkg.com/string-width/-/string-width-1.0.2.tgz#118bdf5b8cdc51a2a7e70d211e07e2b0b9b107d3"
@@ -22157,6 +22220,11 @@ type-fest@^1.0.1, type-fest@^1.2.1, type-fest@^1.2.2:
   resolved "https://registry.yarnpkg.com/type-fest/-/type-fest-1.4.0.tgz#e9fb813fe3bf1744ec359d55d1affefa76f14be1"
   integrity sha512-yGSza74xk0UG8k+pLh5oeoYirvIiWo5t0/o3zHHAO2tRDiZcxWP7fywNlXhqb6/r6sWvwi+RsyQMWhVLe4BVuA==
 
+type-fest@^2.3.3:
+  version "2.13.1"
+  resolved "https://registry.yarnpkg.com/type-fest/-/type-fest-2.13.1.tgz#621c84220df0e01a8469002594fc005714f0cfba"
+  integrity sha512-hXYyrPFwETT2swFLHeoKtJrvSF/ftG/sA15/8nGaLuaDGfVAaq8DYFpu4yOyV4tzp082WqnTEoMsm3flKMI2FQ==
+
 type-is@^1.6.4, type-is@~1.6.15, type-is@~1.6.16, type-is@~1.6.17, type-is@~1.6.18:
   version "1.6.18"
   resolved "https://registry.yarnpkg.com/type-is/-/type-is-1.6.18.tgz#4e552cd05df09467dcbc4ef739de89f2cf37c131"