diff --git a/dist/API/app.js b/dist/API/app.js
index ebd65df..71c8fd9 100644
--- a/dist/API/app.js
+++ b/dist/API/app.js
@@ -35,14 +35,15 @@ function onError(error) {
     if (error.syscall !== "listen") {
         throw error;
     }
-    // handle specific listen errors with friendly messages
     switch (error.code) {
         case "EACCES":
             console.error(`${hostPort} requires elevated privileges`);
-            break;
+            process.exit(1);
+        // eslint-disable-next-line no-fallthrough
         case "EADDRINUSE":
             console.error(`${hostPort} is already in use`);
-            break;
+            process.exit(1);
+        // eslint-disable-next-line no-fallthrough
         default:
             throw error;
     }
diff --git a/dist/API/app.js.map b/dist/API/app.js.map
index c833dca..30089a7 100644
--- a/dist/API/app.js.map
+++ b/dist/API/app.js.map
@@ -1 +1 @@
-{"version":3,"file":"app.js","sourceRoot":"","sources":["../../src/API/app.ts"],"names":[],"mappings":"AAAA,OAAO,IAAI,MAAM,MAAM,CAAC;AACxB,OAAO,OAAO,MAAM,SAAS,CAAC;AAC9B,OAAO,YAAY,MAAM,eAAe,CAAC;AACzC,OAAO,MAAM,MAAM,QAAQ,CAAC;AAC5B,OAAO,EAAE,QAAQ,EAAE,WAAW,EAAE,MAAM,aAAa,CAAC;AACpD,OAAO,EAAE,uBAAuB,EAAE,MAAM,YAAY,CAAC;AAErD,OAAO,iBAAiB,CAAC;AAEzB,OAAO,WAAW,MAAM,mBAAmB,CAAC;AAC5C,OAAO,WAAW,MAAM,mBAAmB,CAAC;AAC5C,OAAO,YAAY,MAAM,oBAAoB,CAAC;AAC9C,OAAO,iBAAiB,MAAM,yBAAyB,CAAC;AACxD,OAAO,UAAU,MAAM,kBAAkB,CAAC;AAC1C,OAAO,UAAU,MAAM,kBAAkB,CAAC;AAG1C,MAAM,GAAG,GAAG,OAAO,EAAE,CAAC;AACtB,GAAG,CAAC,GAAG,CAAE,MAAM,CAAE,KAAK,CAAE,CAAE,CAAC;AAC3B,GAAG,CAAC,GAAG,CAAE,OAAO,CAAC,IAAI,EAAE,CAAE,CAAC;AAC1B,GAAG,CAAC,GAAG,CAAE,OAAO,CAAC,UAAU,CAAC,EAAE,QAAQ,EAAE,KAAK,EAAE,CAAC,CAAE,CAAC;AACnD,GAAG,CAAC,GAAG,CAAE,YAAY,EAAE,CAAE,CAAC;AAC1B,GAAG,CAAC,GAAG,CAAE,MAAM,EAAE,QAAQ,CAAE,CAAC;AAE5B,GAAG,CAAC,GAAG,CAAE,QAAQ,EAAE,WAAW,CAAE,CAAC;AACjC,GAAG,CAAC,GAAG,CAAE,QAAQ,EAAE,WAAW,CAAE,CAAC;AACjC,GAAG,CAAC,GAAG,CAAE,SAAS,EAAE,YAAY,CAAE,CAAC;AACnC,GAAG,CAAC,GAAG,CAAE,cAAc,EAAE,iBAAiB,CAAE,CAAC;AAC7C,GAAG,CAAC,GAAG,CAAE,OAAO,EAAE,UAAU,CAAE,CAAC;AAC/B,GAAG,CAAC,GAAG,CAAE,QAAQ,EAAE,UAAU,CAAE,CAAC;AAChC,GAAG,CAAC,GAAG,CAAE,YAAY,CAAE,CAAC;AAExB,MAAM,MAAM,GAAG,IAAI,CAAC,YAAY,CAAE,GAAG,CAAE,CAAC;AACxC,MAAM,CAAC,MAAM,CAAC,EAAE,IAAI,EAAE,QAAQ,EAAE,IAAI,EAAE,WAAW,EAAE,CAAC,CAAC;AACrD,MAAM,CAAC,EAAE,CAAE,OAAO,EAAE,OAAO,CAAE,CAAC;AAC9B,MAAM,CAAC,EAAE,CAAE,WAAW,EAAE,WAAW,CAAE,CAAC;AAEtC,SAAS,WAAW;IAEnB,OAAO,CAAC,GAAG,CAAE,cAAc,EAAI,MAAM,CAAC,OAAO,EAAmB,CAAC,OAAO,EAAI,MAAM,CAAC,OAAO,EAAmB,CAAC,IAAI,CAAE,CAAC;AACtH,CAAC;AAED,SAAS,OAAO,CAAG,KAA4B;IAE9C,IAAK,KAAK,CAAC,OAAO,KAAK,QAAQ,EAC/B,CAAC;QACA,MAAM,KAAK,CAAC;IACb,CAAC;IACD,uDAAuD;IACvD,QAAS,KAAK,CAAC,IAAI,EACnB,CAAC;QACD,KAAK,QAAQ;YACZ,OAAO,CAAC,KAAK,CAAE,GAAG,QAAQ,+BAA+B,CAAE,CAAC;YAC5D,MAAM;QACP,KAAK,YAAY;YAChB,OAAO,CAAC,KAAK,CAAE,GAAG,QAAQ,oBAAoB,CAAE,CAAC;YACjD,MAAM;QACP;YACC,MAAM,KAAK,CAAC;IACb,CAAC;AACF,CAAC;AAED,SAAS,YAAY,CAAG,GAAgB,EAAE,GAAoB,EAAE,GAAqB,EAAE,IAA0B;IAEhH,IAAK,GAAG,CAAC,WAAW,EACpB,CAAC;QACA,OAAO,IAAI,CAAE,GAAG,CAAE,CAAC;IACpB,CAAC;IACD,GAAG,CAAC,MAAM,CAAE,GAAG,CAAE,CAAC,IAAI,CAAE,uBAAuB,CAAE,GAAG,CAAE,CAAE,CAAC;AAC1D,CAAC"}
\ No newline at end of file
+{"version":3,"file":"app.js","sourceRoot":"","sources":["../../src/API/app.ts"],"names":[],"mappings":"AAAA,OAAO,IAAI,MAAM,MAAM,CAAC;AACxB,OAAO,OAAO,MAAM,SAAS,CAAC;AAC9B,OAAO,YAAY,MAAM,eAAe,CAAC;AACzC,OAAO,MAAM,MAAM,QAAQ,CAAC;AAC5B,OAAO,EAAE,QAAQ,EAAE,WAAW,EAAE,MAAM,aAAa,CAAC;AACpD,OAAO,EAAE,uBAAuB,EAAE,MAAM,YAAY,CAAC;AAErD,OAAO,iBAAiB,CAAC;AAEzB,OAAO,WAAW,MAAM,mBAAmB,CAAC;AAC5C,OAAO,WAAW,MAAM,mBAAmB,CAAC;AAC5C,OAAO,YAAY,MAAM,oBAAoB,CAAC;AAC9C,OAAO,iBAAiB,MAAM,yBAAyB,CAAC;AACxD,OAAO,UAAU,MAAM,kBAAkB,CAAC;AAC1C,OAAO,UAAU,MAAM,kBAAkB,CAAC;AAG1C,MAAM,GAAG,GAAG,OAAO,EAAE,CAAC;AACtB,GAAG,CAAC,GAAG,CAAE,MAAM,CAAE,KAAK,CAAE,CAAE,CAAC;AAC3B,GAAG,CAAC,GAAG,CAAE,OAAO,CAAC,IAAI,EAAE,CAAE,CAAC;AAC1B,GAAG,CAAC,GAAG,CAAE,OAAO,CAAC,UAAU,CAAC,EAAE,QAAQ,EAAE,KAAK,EAAE,CAAC,CAAE,CAAC;AACnD,GAAG,CAAC,GAAG,CAAE,YAAY,EAAE,CAAE,CAAC;AAC1B,GAAG,CAAC,GAAG,CAAE,MAAM,EAAE,QAAQ,CAAE,CAAC;AAE5B,GAAG,CAAC,GAAG,CAAE,QAAQ,EAAE,WAAW,CAAE,CAAC;AACjC,GAAG,CAAC,GAAG,CAAE,QAAQ,EAAE,WAAW,CAAE,CAAC;AACjC,GAAG,CAAC,GAAG,CAAE,SAAS,EAAE,YAAY,CAAE,CAAC;AACnC,GAAG,CAAC,GAAG,CAAE,cAAc,EAAE,iBAAiB,CAAE,CAAC;AAC7C,GAAG,CAAC,GAAG,CAAE,OAAO,EAAE,UAAU,CAAE,CAAC;AAC/B,GAAG,CAAC,GAAG,CAAE,QAAQ,EAAE,UAAU,CAAE,CAAC;AAChC,GAAG,CAAC,GAAG,CAAE,YAAY,CAAE,CAAC;AAExB,MAAM,MAAM,GAAG,IAAI,CAAC,YAAY,CAAE,GAAG,CAAE,CAAC;AACxC,MAAM,CAAC,MAAM,CAAC,EAAE,IAAI,EAAE,QAAQ,EAAE,IAAI,EAAE,WAAW,EAAE,CAAC,CAAC;AACrD,MAAM,CAAC,EAAE,CAAE,OAAO,EAAE,OAAO,CAAE,CAAC;AAC9B,MAAM,CAAC,EAAE,CAAE,WAAW,EAAE,WAAW,CAAE,CAAC;AAEtC,SAAS,WAAW;IAEnB,OAAO,CAAC,GAAG,CAAE,cAAc,EAAI,MAAM,CAAC,OAAO,EAAmB,CAAC,OAAO,EAAI,MAAM,CAAC,OAAO,EAAmB,CAAC,IAAI,CAAE,CAAC;AACtH,CAAC;AAED,SAAS,OAAO,CAAG,KAA4B;IAE9C,IAAK,KAAK,CAAC,OAAO,KAAK,QAAQ,EAC/B,CAAC;QACA,MAAM,KAAK,CAAC;IACb,CAAC;IACD,QAAS,KAAK,CAAC,IAAI,EACnB,CAAC;QACD,KAAK,QAAQ;YACZ,OAAO,CAAC,KAAK,CAAE,GAAG,QAAQ,+BAA+B,CAAE,CAAC;YAC5D,OAAO,CAAC,IAAI,CAAE,CAAC,CAAE,CAAC;QACnB,0CAA0C;QAC1C,KAAK,YAAY;YAChB,OAAO,CAAC,KAAK,CAAE,GAAG,QAAQ,oBAAoB,CAAE,CAAC;YACjD,OAAO,CAAC,IAAI,CAAE,CAAC,CAAE,CAAC;QACnB,0CAA0C;QAC1C;YACC,MAAM,KAAK,CAAC;IACb,CAAC;AACF,CAAC;AAED,SAAS,YAAY,CAAG,GAAgB,EAAE,GAAoB,EAAE,GAAqB,EAAE,IAA0B;IAEhH,IAAK,GAAG,CAAC,WAAW,EACpB,CAAC;QACA,OAAO,IAAI,CAAE,GAAG,CAAE,CAAC;IACpB,CAAC;IACD,GAAG,CAAC,MAAM,CAAE,GAAG,CAAE,CAAC,IAAI,CAAE,uBAAuB,CAAE,GAAG,CAAE,CAAE,CAAC;AAC1D,CAAC"}
\ No newline at end of file
diff --git a/dist/API/blockchain.js b/dist/API/blockchain.js
index a0fc4c3..f4bedbd 100644
--- a/dist/API/blockchain.js
+++ b/dist/API/blockchain.js
@@ -1,9 +1,9 @@
 import Blockchain from "../library/main.js";
 import Consensus from "../library/pow-consensus.js";
-const consensus = new Consensus();
 import { initJsonFile } from "../library/utils.js";
 import Wallet from "../library/wallet.js";
 import { name, dbPath, minerKeysFile, hostUrl, nodesList } from "./config.js";
+const consensus = new Consensus();
 const minerKeys = initJsonFile(minerKeysFile, Wallet.generateKeyPair());
 export default new Blockchain({
     dbPath,
diff --git a/dist/API/blockchain.js.map b/dist/API/blockchain.js.map
index 40507a0..f9d0d39 100644
--- a/dist/API/blockchain.js.map
+++ b/dist/API/blockchain.js.map
@@ -1 +1 @@
-{"version":3,"file":"blockchain.js","sourceRoot":"","sources":["../../src/API/blockchain.ts"],"names":[],"mappings":"AAAA,OAAO,UAAU,MAAM,oBAAoB,CAAC;AAC5C,OAAO,SAAS,MAAM,6BAA6B,CAAC;AACpD,MAAM,SAAS,GAAG,IAAI,SAAS,EAAE,CAAC;AAClC,OAAO,EAAE,YAAY,EAAE,MAAM,qBAAqB,CAAC;AACnD,OAAO,MAAM,MAAM,sBAAsB,CAAC;AAC1C,OAAO,EAAE,IAAI,EAAE,MAAM,EAAE,aAAa,EAAE,OAAO,EAAE,SAAS,EAAE,MAAM,aAAa,CAAC;AAE9E,MAAM,SAAS,GAAG,YAAY,CAAE,aAAa,EAAE,MAAM,CAAC,eAAe,EAAE,CAAE,CAAC;AAC1E,eAAe,IAAI,UAAU,CAAC;IAC7B,MAAM;IACN,KAAK,EAAE;QACN,IAAI,EAAE,SAAS;QACf,OAAO;KACP;IACD,SAAS,EAAE,IAAI;IACf,cAAc,EAAE,SAAS,CAAC,SAAS;IACnC,SAAS;CACT,CAAC,CAAC"}
\ No newline at end of file
+{"version":3,"file":"blockchain.js","sourceRoot":"","sources":["../../src/API/blockchain.ts"],"names":[],"mappings":"AAAA,OAAO,UAAU,MAAM,oBAAoB,CAAC;AAC5C,OAAO,SAAS,MAAM,6BAA6B,CAAC;AACpD,OAAO,EAAE,YAAY,EAAE,MAAM,qBAAqB,CAAC;AACnD,OAAO,MAAM,MAAM,sBAAsB,CAAC;AAC1C,OAAO,EAAE,IAAI,EAAE,MAAM,EAAE,aAAa,EAAE,OAAO,EAAE,SAAS,EAAE,MAAM,aAAa,CAAC;AAC9E,MAAM,SAAS,GAAG,IAAI,SAAS,EAAE,CAAC;AAElC,MAAM,SAAS,GAAG,YAAY,CAAE,aAAa,EAAE,MAAM,CAAC,eAAe,EAAE,CAAE,CAAC;AAC1E,eAAe,IAAI,UAAU,CAAC;IAC7B,MAAM;IACN,KAAK,EAAE;QACN,IAAI,EAAE,SAAS;QACf,OAAO;KACP;IACD,SAAS,EAAE,IAAI;IACf,cAAc,EAAE,SAAS,CAAC,SAAS;IACnC,SAAS;CACT,CAAC,CAAC"}
\ No newline at end of file
diff --git a/dist/API/routes/block.js b/dist/API/routes/block.js
index ef185a6..da43a85 100644
--- a/dist/API/routes/block.js
+++ b/dist/API/routes/block.js
@@ -8,19 +8,16 @@ router.get("/", function (req, res) {
     const { to, index, from, firstAndLast } = req.query;
     if (!index && !from && !to && !list && !firstAndLast) {
         res.json(blockchain.chain.latestBlock);
-        return;
     }
     else if (index) {
         const blockIndex = toNum(index);
         res.json(blockchain.chain.get(blockIndex));
-        return;
     }
     else if (from || to) {
         const blockFrom = toNum(from);
         const blockTo = toNum(to);
         const blocks = blockchain.getBlocks(blockFrom, blockTo);
         res.json(blocks);
-        return;
     }
     else if (list) {
         const blockList = list.toString().split(",");
@@ -29,14 +26,12 @@ router.get("/", function (req, res) {
             blocks.push(blockchain.chain.get(blcokIndex));
         }
         res.json(blocks);
-        return;
     }
     else if (firstAndLast) {
         const blocks = [];
         blocks.push(blockchain.chain.get(0));
         blocks.push(blockchain.chain.latestBlock);
         res.json(blocks);
-        return;
     }
 });
 router.post("/", function (req, res) {
diff --git a/dist/API/routes/block.js.map b/dist/API/routes/block.js.map
index 22fac1b..d1d7627 100644
--- a/dist/API/routes/block.js.map
+++ b/dist/API/routes/block.js.map
@@ -1 +1 @@
-{"version":3,"file":"block.js","sourceRoot":"","sources":["../../../src/API/routes/block.ts"],"names":[],"mappings":"AAAA,OAAO,OAAO,MAAM,SAAS,CAAC;AAC9B,OAAO,KAAK,MAAM,OAAO,CAAC;AAC1B,OAAO,UAAU,MAAM,kBAAkB,CAAC;AAC1C,OAAO,EAAE,KAAK,EAAE,MAAM,aAAa,CAAC;AAEpC,MAAM,MAAM,GAAG,OAAO,CAAC,MAAM,EAAE,CAAC;AAEhC,MAAM,CAAC,GAAG,CAAE,GAAG,EAAE,UAAW,GAAG,EAAE,GAAG;IAEnC,MAAM,EAAE,IAAI,EAAE,GAAG,GAAG,CAAC,KAAK,CAAC;IAC3B,MAAM,EAAE,EAAE,EAAE,KAAK,EAAE,IAAI,EAAE,YAAY,EAAE,GAAG,GAAG,CAAC,KAAK,CAAC;IACpD,IAAK,CAAC,KAAK,IAAI,CAAC,IAAI,IAAI,CAAC,EAAE,IAAI,CAAC,IAAI,IAAI,CAAC,YAAY,EACrD,CAAC;QACA,GAAG,CAAC,IAAI,CAAE,UAAU,CAAC,KAAK,CAAC,WAAW,CAAE,CAAC;QACzC,OAAO;IACR,CAAC;SACI,IAAK,KAAK,EACf,CAAC;QACA,MAAM,UAAU,GAAG,KAAK,CAAE,KAAK,CAAE,CAAC;QAClC,GAAG,CAAC,IAAI,CAAE,UAAU,CAAC,KAAK,CAAC,GAAG,CAAE,UAAU,CAAE,CAAE,CAAC;QAC/C,OAAO;IACR,CAAC;SACI,IAAK,IAAI,IAAI,EAAE,EACpB,CAAC;QACA,MAAM,SAAS,GAAG,KAAK,CAAE,IAAI,CAAE,CAAC;QAChC,MAAM,OAAO,GAAG,KAAK,CAAE,EAAE,CAAE,CAAC;QAC5B,MAAM,MAAM,GAAG,UAAU,CAAC,SAAS,CAAE,SAAS,EAAE,OAAO,CAAE,CAAC;QAC1D,GAAG,CAAC,IAAI,CAAE,MAAM,CAAE,CAAC;QACnB,OAAO;IACR,CAAC;SACI,IAAK,IAAI,EACd,CAAC;QACA,MAAM,SAAS,GAAG,IAAI,CAAC,QAAQ,EAAE,CAAC,KAAK,CAAE,GAAG,CAAE,CAAC;QAC/C,MAAM,MAAM,GAAG,EAAE,CAAC;QAClB,KAAM,MAAM,UAAU,IAAI,SAAS,EACnC,CAAC;YACA,MAAM,CAAC,IAAI,CAAE,UAAU,CAAC,KAAK,CAAC,GAAG,CAAE,UAAU,CAAE,CAAE,CAAC;QACnD,CAAC;QACD,GAAG,CAAC,IAAI,CAAE,MAAM,CAAE,CAAC;QACnB,OAAO;IACR,CAAC;SACI,IAAK,YAAY,EACtB,CAAC;QACA,MAAM,MAAM,GAAG,EAAE,CAAC;QAClB,MAAM,CAAC,IAAI,CAAE,UAAU,CAAC,KAAK,CAAC,GAAG,CAAE,CAAC,CAAE,CAAE,CAAC;QACzC,MAAM,CAAC,IAAI,CAAE,UAAU,CAAC,KAAK,CAAC,WAAW,CAAE,CAAC;QAC5C,GAAG,CAAC,IAAI,CAAE,MAAM,CAAE,CAAC;QACnB,OAAO;IACR,CAAC;AACF,CAAC,CAAC,CAAC;AAEH,MAAM,CAAC,IAAI,CAAE,GAAG,EAAE,UAAW,GAAG,EAAE,GAAG;IAEpC,MAAM,KAAK,GAAG,UAAU,CAAC,QAAQ,CAAE,GAAG,CAAC,IAAI,CAAE,CAAC;IAC9C,GAAG,CAAC,IAAI,CAAE,KAAK,CAAE,CAAC;AACnB,CAAC,CAAC,CAAC;AAEH,MAAM,CAAC,GAAG,CAAE,YAAY,EAAE,KAAK,WAAY,GAAG,EAAE,GAAG;IAElD,KAAM,MAAM,IAAI,IAAI,UAAU,CAAC,KAAK,CAAC,IAAI,EACzC,CAAC;QACA,IACA,CAAC;YACA,MAAM,KAAK,CAAC,IAAI,CAAE,GAAG,IAAI,QAAQ,EAAE,UAAU,CAAC,KAAK,CAAC,WAAW,CAAE,CAAC;QACnE,CAAC;QACD,OAAQ,KAAK,EACb,CAAC;YACA,IAAK,KAAK,YAAY,KAAK,EAC3B,CAAC;gBACA,OAAO,CAAC,KAAK,CAAE,8BAA8B,IAAI,GAAG,EAAE,KAAK,CAAC,OAAO,CAAE,CAAC;YACvE,CAAC;iBAED,CAAC;gBACA,OAAO,CAAC,KAAK,CAAE,8BAA8B,IAAI,EAAE,EAAE,KAAK,CAAE,CAAC;YAC9D,CAAC;QACF,CAAC;IACF,CAAC;IACD,GAAG,CAAC,IAAI,CAAE,0BAA0B,CAAE,CAAC;AACxC,CAAC,CAAC,CAAC;AAEH,eAAe,MAAM,CAAC"}
\ No newline at end of file
+{"version":3,"file":"block.js","sourceRoot":"","sources":["../../../src/API/routes/block.ts"],"names":[],"mappings":"AAAA,OAAO,OAAO,MAAM,SAAS,CAAC;AAC9B,OAAO,KAAK,MAAM,OAAO,CAAC;AAC1B,OAAO,UAAU,MAAM,kBAAkB,CAAC;AAC1C,OAAO,EAAE,KAAK,EAAE,MAAM,aAAa,CAAC;AAEpC,MAAM,MAAM,GAAG,OAAO,CAAC,MAAM,EAAE,CAAC;AAEhC,MAAM,CAAC,GAAG,CAAE,GAAG,EAAE,UAAW,GAAG,EAAE,GAAG;IAEnC,MAAM,EAAE,IAAI,EAAE,GAAG,GAAG,CAAC,KAAK,CAAC;IAC3B,MAAM,EAAE,EAAE,EAAE,KAAK,EAAE,IAAI,EAAE,YAAY,EAAE,GAAG,GAAG,CAAC,KAAK,CAAC;IACpD,IAAK,CAAC,KAAK,IAAI,CAAC,IAAI,IAAI,CAAC,EAAE,IAAI,CAAC,IAAI,IAAI,CAAC,YAAY,EACrD,CAAC;QACA,GAAG,CAAC,IAAI,CAAE,UAAU,CAAC,KAAK,CAAC,WAAW,CAAE,CAAC;IAC1C,CAAC;SACI,IAAK,KAAK,EACf,CAAC;QACA,MAAM,UAAU,GAAG,KAAK,CAAE,KAAK,CAAE,CAAC;QAClC,GAAG,CAAC,IAAI,CAAE,UAAU,CAAC,KAAK,CAAC,GAAG,CAAE,UAAU,CAAE,CAAE,CAAC;IAChD,CAAC;SACI,IAAK,IAAI,IAAI,EAAE,EACpB,CAAC;QACA,MAAM,SAAS,GAAG,KAAK,CAAE,IAAI,CAAE,CAAC;QAChC,MAAM,OAAO,GAAG,KAAK,CAAE,EAAE,CAAE,CAAC;QAC5B,MAAM,MAAM,GAAG,UAAU,CAAC,SAAS,CAAE,SAAS,EAAE,OAAO,CAAE,CAAC;QAC1D,GAAG,CAAC,IAAI,CAAE,MAAM,CAAE,CAAC;IACpB,CAAC;SACI,IAAK,IAAI,EACd,CAAC;QACA,MAAM,SAAS,GAAG,IAAI,CAAC,QAAQ,EAAE,CAAC,KAAK,CAAE,GAAG,CAAE,CAAC;QAC/C,MAAM,MAAM,GAAG,EAAE,CAAC;QAClB,KAAM,MAAM,UAAU,IAAI,SAAS,EACnC,CAAC;YACA,MAAM,CAAC,IAAI,CAAE,UAAU,CAAC,KAAK,CAAC,GAAG,CAAE,UAAU,CAAE,CAAE,CAAC;QACnD,CAAC;QACD,GAAG,CAAC,IAAI,CAAE,MAAM,CAAE,CAAC;IACpB,CAAC;SACI,IAAK,YAAY,EACtB,CAAC;QACA,MAAM,MAAM,GAAG,EAAE,CAAC;QAClB,MAAM,CAAC,IAAI,CAAE,UAAU,CAAC,KAAK,CAAC,GAAG,CAAE,CAAC,CAAE,CAAE,CAAC;QACzC,MAAM,CAAC,IAAI,CAAE,UAAU,CAAC,KAAK,CAAC,WAAW,CAAE,CAAC;QAC5C,GAAG,CAAC,IAAI,CAAE,MAAM,CAAE,CAAC;IACpB,CAAC;AACF,CAAC,CAAC,CAAC;AAEH,MAAM,CAAC,IAAI,CAAE,GAAG,EAAE,UAAW,GAAG,EAAE,GAAG;IAEpC,MAAM,KAAK,GAAG,UAAU,CAAC,QAAQ,CAAE,GAAG,CAAC,IAAI,CAAE,CAAC;IAC9C,GAAG,CAAC,IAAI,CAAE,KAAK,CAAE,CAAC;AACnB,CAAC,CAAC,CAAC;AAEH,MAAM,CAAC,GAAG,CAAE,YAAY,EAAE,KAAK,WAAY,GAAG,EAAE,GAAG;IAElD,KAAM,MAAM,IAAI,IAAI,UAAU,CAAC,KAAK,CAAC,IAAI,EACzC,CAAC;QACA,IACA,CAAC;YACA,MAAM,KAAK,CAAC,IAAI,CAAE,GAAG,IAAI,QAAQ,EAAE,UAAU,CAAC,KAAK,CAAC,WAAW,CAAE,CAAC;QACnE,CAAC;QACD,OAAQ,KAAK,EACb,CAAC;YACA,IAAK,KAAK,YAAY,KAAK,EAC3B,CAAC;gBACA,OAAO,CAAC,KAAK,CAAE,8BAA8B,IAAI,GAAG,EAAE,KAAK,CAAC,OAAO,CAAE,CAAC;YACvE,CAAC;iBAED,CAAC;gBACA,OAAO,CAAC,KAAK,CAAE,8BAA8B,IAAI,EAAE,EAAE,KAAK,CAAE,CAAC;YAC9D,CAAC;QACF,CAAC;IACF,CAAC;IACD,GAAG,CAAC,IAAI,CAAE,0BAA0B,CAAE,CAAC;AACxC,CAAC,CAAC,CAAC;AAEH,eAAe,MAAM,CAAC"}
\ No newline at end of file
diff --git a/src/API/app.ts b/src/API/app.ts
index 32aa59f..a1326ca 100644
--- a/src/API/app.ts
+++ b/src/API/app.ts
@@ -46,21 +46,22 @@ function onError ( error: NodeJS.ErrnoException )
 	{
 		throw error;
 	}
-	// handle specific listen errors with friendly messages
 	switch ( error.code )
 	{
 	case "EACCES":
 		console.error( `${hostPort} requires elevated privileges` );
-		break;
+		process.exit( 1 );
+	// eslint-disable-next-line no-fallthrough
 	case "EADDRINUSE":
 		console.error( `${hostPort} is already in use` );
-		break;
+		process.exit( 1 );
+	// eslint-disable-next-line no-fallthrough
 	default:
 		throw error;
 	}
 }
 
-function errorHandler ( err: CustomError, req: express.Request, res: express.Response, next: express.NextFunction )
+function errorHandler ( err: SimpleError, req: express.Request, res: express.Response, next: express.NextFunction )
 {
 	if ( res.headersSent )
 	{
diff --git a/src/API/blockchain.ts b/src/API/blockchain.ts
index 2cea657..57eabb7 100644
--- a/src/API/blockchain.ts
+++ b/src/API/blockchain.ts
@@ -1,9 +1,9 @@
 import Blockchain from "../library/main.js";
 import Consensus from "../library/pow-consensus.js";
-const consensus = new Consensus();
 import { initJsonFile } from "../library/utils.js";
 import Wallet from "../library/wallet.js";
 import { name, dbPath, minerKeysFile, hostUrl, nodesList } from "./config.js";
+const consensus = new Consensus();
 
 const minerKeys = initJsonFile( minerKeysFile, Wallet.generateKeyPair() );
 export default new Blockchain({
diff --git a/src/API/routes/block.ts b/src/API/routes/block.ts
index 85ff393..f4b9b32 100644
--- a/src/API/routes/block.ts
+++ b/src/API/routes/block.ts
@@ -12,13 +12,11 @@ router.get( "/", function ( req, res )
 	if ( !index && !from && !to && !list && !firstAndLast )
 	{
 		res.json( blockchain.chain.latestBlock );
-		return;
 	}
 	else if ( index )
 	{
 		const blockIndex = toNum( index );
 		res.json( blockchain.chain.get( blockIndex ) );
-		return;
 	}
 	else if ( from || to )
 	{
@@ -26,7 +24,6 @@ router.get( "/", function ( req, res )
 		const blockTo = toNum( to );
 		const blocks = blockchain.getBlocks( blockFrom, blockTo );
 		res.json( blocks );
-		return;
 	}
 	else if ( list )
 	{
@@ -37,7 +34,6 @@ router.get( "/", function ( req, res )
 			blocks.push( blockchain.chain.get( blcokIndex ) );
 		}
 		res.json( blocks );
-		return;
 	}
 	else if ( firstAndLast )
 	{
@@ -45,7 +41,6 @@ router.get( "/", function ( req, res )
 		blocks.push( blockchain.chain.get( 0 ) );
 		blocks.push( blockchain.chain.latestBlock );
 		res.json( blocks );
-		return;
 	}
 });
 
diff --git a/src/API/utils.ts b/src/API/utils.ts
index c772e1c..87c3159 100644
--- a/src/API/utils.ts
+++ b/src/API/utils.ts
@@ -20,7 +20,7 @@ export function toNum ( value: unknown ): number
 	return Number( value );
 }
 
-export function convertErrorToSimpleObj ( err: CustomError )
+export function convertErrorToSimpleObj ( err: SimpleError )
 {
 	if ( err.isAxiosError )
 	{
diff --git a/src/global.d.ts b/src/global.d.ts
index 24bde1c..8b44e6a 100644
--- a/src/global.d.ts
+++ b/src/global.d.ts
@@ -64,11 +64,6 @@ interface ErrorWithStdsOutErr extends Error
 	status?: number;
 }
 
-interface CustomError extends Error
-{
-	[x: string]: CustomError;
-}
-
 interface SimpleError
 {
 	message?: string;