Stop using undefined value

.eslintrc.cjs

@@ -31,7 +31,6 @@ module.exports = {
             "never"
         ],
 
-        "no-undefined": "warn",
         "no-underscore-dangle": "warn",
         "no-use-before-define": "warn",
         "no-warning-comments": "warn",

src/contractFactory.ts

@@ -15,7 +15,7 @@ const getSkaleManifest = async () => {
         await getManifestFile(),
         "utf-8"
     ));
-    if (manifest.libraries === undefined) {
+    if (typeof manifest.libraries === "undefined") {
         manifest.libraries = {};
     }
     return manifest as SkaleManifestData;
@@ -119,7 +119,7 @@ const getLibrariesToUpgrade = async (
     const librariesNames = getLibrariesNames(linkReferences);
     const byteCodes = await loadBytesCodes(librariesNames);
     for (const libraryName of librariesNames) {
-        if (manifest.libraries[libraryName] === undefined) {
+        if (typeof manifest.libraries[libraryName] === "undefined") {
             librariesToUpgrade.push(libraryName);
         } else if (
             hashBytecode(byteCodes.get(libraryName) as string) ===

src/deploy.ts

@@ -100,7 +100,7 @@ const updateManifest = async (libraryArtifacts: LibraryArtifacts) => {
         await getManifestFile(),
         "utf-8"
     )) as SkaleManifestData;
-    if (manifest.libraries === undefined) {
+    if (typeof manifest.libraries === "undefined") {
         Object.assign(
             manifest,
             {"libraries": libraryArtifacts}

src/submitters/safe-to-ima-submitter.ts

@@ -48,7 +48,7 @@ export class SafeToImaSubmitter extends SafeSubmitter {
     }
 
     private async _getMessageProxyForMainnet () {
-        if (this._messageProxyForMainnet === undefined) {
+        if (typeof this._messageProxyForMainnet === "undefined") {
             this._messageProxyForMainnet =
                 await this.imaInstance.getContract("MessageProxyForMainnet");
         }

src/upgrader.ts

@@ -30,8 +30,8 @@ interface Target {
     contractNamesToUpgrade: string[]
 }
 
-const withoutUndefined = <T>(array: Array<T | undefined>) => array.
-    filter((element) => element !== undefined) as Array<T>;
+const withoutNull = <T>(array: Array<T | null>) => array.
+    filter((element) => element !== null) as Array<T>;
 
 
 export abstract class Upgrader {
@@ -106,13 +106,13 @@ export abstract class Upgrader {
     // Private
 
     private async callInitialize () {
-        if (this.initialize !== undefined) {
+        if (typeof this.initialize !== "undefined") {
             await this.initialize();
         }
     }
 
     private async callDeployNewContracts () {
-        if (this.deployNewContracts !== undefined) {
+        if (typeof this.deployNewContracts !== "undefined") {
             // Deploy new contracts
             await this.deployNewContracts();
         }
@@ -176,7 +176,7 @@ export abstract class Upgrader {
     private async deployNewImplementations () {
         const contracts = await Promise.all(this.contractNamesToUpgrade.
             map(this.deployNewImplementation));
-        return withoutUndefined(contracts);
+        return withoutNull(contracts);
     }
 
     private async deployNewImplementation (contract: string) {
@@ -186,11 +186,10 @@ export abstract class Upgrader {
                 (await this.instance.getContract(contract)).address;
 
         console.log(`Prepare upgrade of ${contract}`);
-        const
-            currentImplementationAddress = await getImplementationAddress(
-                network.provider,
-                proxyAddress
-            );
+        const currentImplementationAddress = await getImplementationAddress(
+            network.provider,
+            proxyAddress
+        );
         const newImplementationAddress = await upgrades.prepareUpgrade(
             proxyAddress,
             contractFactory,
@@ -207,7 +206,7 @@ export abstract class Upgrader {
             };
         }
         console.log(chalk.gray(`Contract ${contract} is up to date`));
-        return undefined;
+        return null;
     }
 
     private async getNormalizedDeployedVersion () {

src/version.ts

@@ -8,7 +8,7 @@ const exec = util.promisify(asyncExec);
 class VersionNotFound extends Error {}
 
 const getVersionFilename = async (folder?: string): Promise<string> => {
-    if (folder === undefined) {
+    if (typeof folder === "undefined") {
         return getVersionFilename((
             await exec("git rev-parse --show-toplevel")
         ).stdout.trim());