diff --git a/.nvmrc b/.nvmrc
index d4b25d0..bd0878c 100644
--- a/.nvmrc
+++ b/.nvmrc
@@ -1 +1 @@
-16.16
+20.5
diff --git a/README.md b/README.md
index 043ac6a..914f7ac 100644
--- a/README.md
+++ b/README.md
@@ -150,6 +150,7 @@ $ cw -l
 - [ ] v17.x ⛔
 - [x] v18.x ✅
 - [x] v19.x ✅
+- [x] v20.x ✅
 
 *tested on Mac M1*
 
diff --git a/cli.js b/cli.js
index 73ff825..9872ec8 100644
--- a/cli.js
+++ b/cli.js
@@ -1,52 +1,12 @@
 #!/usr/bin/env node
 'use strict';
 
-import { program } from 'commander';
 import chalk from 'chalk';
+import { options } from './src/options.js';
 import { log, supportedChains } from './src/utils.js';
 import Method from './src/Method.js';
 
-program.option('-b, --chain <ticker>', 'Wallet for specific blockchain', 'ERC');
-program.option('-c, --chain <ticker>', 'Wallet for specific blockchain', 'ERC');
-program.option(
-  '-D, --csv [filename]',
-  'Save result into CSV file'
-);
-program.option(
-  '-f, --format <format>',
-  'Wallet format type (for cryptos with multiple wallet formats)'
-);
-program.option(
-  '-F, --filename <filename>',
-  'Filename to output the data (works with -o argument)'
-);
-program.option('-g, --geek', 'Display some more info (geeky)');
-program.option('-l, --list', 'List all supported cryptos');
-program.option(
-  '-m, --mnemonic [mnemonic]',
-  'Generate wallet from mnemonic string OR just a mnemonic string'
-);
-program.option(
-  '-n, --number <number>',
-  'Number of wallets to generate (if supported)'
-);
-program.option('-o, --output <format>', 'Return results into some file');
-program.option('-p, --prefix <prefix>', 'Desired wallet prefix');
-program.option(
-  '-P, --prefix-sensitive <prefix>',
-  'Desired wallet prefix (case-sensitive)'
-);
-program.option('-s, --suffix <suffix>', 'Desired wallet suffix');
-program.option(
-  '-S, --suffix-sensitive <suffix>',
-  'Desired wallet suffix (case-sensitive)'
-);
-program.option('-v, --version', 'Display cryptowallet version');
-program.parse();
-
 (async () => {
-  const options = program.opts();
-
   if (options.list !== undefined) {
     return new Method('list').init();
   }
diff --git a/package.json b/package.json
index 43d1acf..80c2d01 100644
--- a/package.json
+++ b/package.json
@@ -1,6 +1,6 @@
 {
   "name": "@yerofey/cryptowallet-cli",
-  "version": "1.9.0",
+  "version": "1.10.0",
   "description": "Crypto wallet generator CLI tool",
   "type": "module",
   "homepage": "https://github.com/yerofey/cryptowallet-cli",
diff --git a/src/CW.js b/src/CW.js
index 0e90950..54732f0 100644
--- a/src/CW.js
+++ b/src/CW.js
@@ -3,11 +3,17 @@ import { Wallet } from './Wallet.js';
 
 class CW {
   constructor(chain, options = {}) {
+    this.chain = chain;
+    this.options = this._prepareOptions(chain, options);
+  }
+
+  _prepareOptions(chain, options) {
     const csvFilename = 'cw-output';
+
     if (options.csv !== undefined) {
       options.output = 'csv';
 
-      if (typeof options.csv === 'string' && (options.csv).length > 0) {
+      if (typeof options.csv === 'string' && options.csv.length > 0) {
         options.filename = options.csv;
       }
     }
@@ -26,15 +32,7 @@ class CW {
       suffixIsCaseSensitive: options.suffixSensitive !== undefined,
     };
 
-    for (const key of Object.keys(defaultValues)) {
-      // eslint-disable-next-line no-prototype-builtins
-      if (!options.hasOwnProperty(key)) {
-        options[key] = defaultValues[key];
-      }
-    }
-
-    this.chain = chain;
-    this.options = options;
+    return { ...defaultValues, ...options };
   }
 
   async init() {
@@ -42,10 +40,7 @@ class CW {
     this.row = chainData.row || {};
 
     const w = await new Wallet(this).init();
-
-    for (const key of Object.keys(w)) {
-      this[key] = w[key];
-    }
+    Object.assign(this, w);
 
     return this;
   }
diff --git a/src/Chain.js b/src/Chain.js
index 87d48e8..38e7b94 100644
--- a/src/Chain.js
+++ b/src/Chain.js
@@ -2,38 +2,43 @@ import path from 'node:path';
 import { loadJson } from './utils.js';
 
 class Chain {
-  constructor(chain, format) {
+  constructor(chain, format = '') {
     this.chain = chain;
     this.format = format;
+    this.row = null;
   }
 
   async init() {
-    // eslint-disable-next-line no-undef
-    const content = await loadJson(`${path.dirname(import.meta.url)}/chains/${this.chain}.json`.replace('file://', ''));
-    const data = (() => {
-      if (content.formats !== undefined) {
-        if (this.format != '' && this.format != content.defaultFormat) {
-          // case-insensitive format
-          for (const key of Object.keys(content.formats)) {
-            if (this.format.toLowerCase() == key.toLowerCase()) {
-              return content.formats[key];
-            }
-          }
-        }
-
-        return content.formats[content.defaultFormat];
-      }
-
-      return content;
-    })();
-
-    this.row = {
-      ...content,
-      ...data,
-    };
-
+    const content = await this._loadChainJson();
+    this.row = this._parseContent(content);
     return this;
   }
+
+  async _loadChainJson() {
+    const filePath = `${path.dirname(import.meta.url)}/chains/${
+      this.chain
+    }.json`.replace('file://', '');
+    return await loadJson(filePath);
+  }
+
+  _parseContent(content) {
+    if (!content.formats) return content;
+
+    const formatKey = this._findFormatKey(content);
+    return { ...content, ...content.formats[formatKey] };
+  }
+
+  _findFormatKey(content) {
+    if (!this.format || this.format === content.defaultFormat)
+      return content.defaultFormat;
+
+    const normalizedFormat = this.format.toLowerCase();
+    const matchingKey = Object.keys(content.formats).find(
+      (key) => key.toLowerCase() === normalizedFormat
+    );
+
+    return matchingKey || content.defaultFormat;
+  }
 }
 
 export default Chain;
diff --git a/src/Method.js b/src/Method.js
index cf77eeb..fd7103b 100644
--- a/src/Method.js
+++ b/src/Method.js
@@ -1,5 +1,11 @@
 import path from 'node:path';
 import chalk from 'chalk';
+import columnify from 'columnify';
+import CsvWriter from 'csv-writer';
+import { log, supportedChains, loadJson } from './utils.js';
+import { generateMnemonicString } from './Wallet.js';
+import CW from './CW.js';
+
 const {
   blue,
   green,
@@ -10,366 +16,372 @@ const {
   magenta,
   white,
 } = chalk;
-import columnify from 'columnify';
-import CsvWriter from 'csv-writer';
-import {
-  log,
-  supportedChains,
-  loadJson,
-} from './utils.js';
-import { generateMnemonicString } from './Wallet.js';
-import CW from './CW.js';
-const pkg = await loadJson(`${path.dirname(import.meta.url)}/../package.json`.replace('file://', ''));
-// eslint-disable-next-line no-undef
+
+const pkg = await loadJson(
+  `${path.dirname(import.meta.url)}/../package.json`.replace('file://', '')
+);
 const _version = pkg['version'] || 0;
 
 class Method {
   constructor(name, params = {}) {
     this.name = name;
     this.params = params;
+    this.callMethods = this._initializeMethods();
   }
 
-  async init() {
-    const callMethod = {
+  _initializeMethods() {
+    return {
       _: () => {},
-      list: async () => {
-        log(`🔠  All supported blockchains:\n`);
-        let cryptos = {};
-        for (const val of supportedChains) {
-          // eslint-disable-next-line no-undef
-          const data = await loadJson(`${path.dirname(import.meta.url)}/chains/${val}.json`.replace('file://', ''));
+      list: this._list.bind(this),
+      mnemonic: this._mnemonic.bind(this),
+      version: this._version.bind(this),
+      wallet: this._wallet.bind(this),
+    };
+  }
 
-          let title = data.title || '';
-          if (title == '' || val == 'ERC') {
-            continue;
-          }
-          cryptos[blue(val)] = title;
-        }
+  async _list() {
+    log(`🔠  All supported blockchains:\n`);
+    let cryptos = {};
+    for (const val of supportedChains) {
+      // eslint-disable-next-line no-undef
+      const data = await loadJson(
+        `${path.dirname(import.meta.url)}/chains/${val}.json`.replace(
+          'file://',
+          ''
+        )
+      );
+
+      let title = data.title || '';
+      if (title == '' || val == 'ERC') {
+        continue;
+      }
+      cryptos[blue(val)] = title;
+    }
+    log(
+      columnify(cryptos, {
+        showHeaders: false,
+        columnSplitter: ' - ',
+      })
+    );
+    log();
+    log(`ℹ️   Use flag "-c TICKER" to select specific blockchain`);
+  }
+
+  _mnemonic() {
+    log(
+      `✨  ${green('Done!')} ${blueBright(
+        'Here is your randomly generated 12 words mnemonic string:'
+      )}\n`
+    );
+    log(`📄  ${generateMnemonicString()}`);
+    log();
+    log(
+      greenBright(
+        'ℹ️   You can import this wallet into MetaMask, Trust Wallet and many other wallet apps'
+      )
+    );
+  }
+
+  _version() {
+    log(_version);
+  }
+
+  async _wallet() {
+    const chain = this.params.chain;
+    const options = this.params.options;
+
+    const cw = await new CW(chain, options).init();
+
+    let chainFullName =
+      (cw.row.name || chain) +
+      (cw.wallet.format !== undefined && cw.wallet.format != ''
+        ? ' (' + cw.wallet.format + ')'
+        : '');
+
+    if (cw.options.prefix && !cw.prefixFound) {
+      log(
+        `😢  ${yellow(
+          'Sorry, ' + chainFullName + ' does not support prefix yet...'
+        )}`
+      );
+    }
+
+    if (cw.options.suffix && !cw.suffixFound) {
+      log(
+        `😢  ${yellow(
+          'Sorry, ' + chainFullName + ' does not support suffix yet...'
+        )}`
+      );
+    }
+
+    if (cw.options.mnemonic != '' && cw.wallet.mnemonic == undefined) {
+      log(
+        `😢  ${yellow(
+          'Sorry, ' + chainFullName + ' does not support mnemonic yet...'
+        )}`
+      );
+    }
+
+    if (cw.wallet.error !== undefined) {
+      log(`⛔️  ${red(`Error: ${cw.wallet.error}`)}`);
+      return;
+    }
+
+    let linesCount = 0;
+    const outputFormats = ['csv'];
+    const displayAsText =
+      cw.options.output === undefined ||
+      !outputFormats.includes(cw.options.output);
+
+    // prefix, suffix
+    if (displayAsText) {
+      if (cw.prefixFound && cw.suffixFound) {
         log(
-          columnify(cryptos, {
-            showHeaders: false,
-            columnSplitter: ' - ',
-          })
+          `✨  ${green('Done!')} ${blueBright(
+            'Here is your brand new ' +
+              chainFullName +
+              ' wallet with "' +
+              cw.options.prefix +
+              '" prefix and "' +
+              cw.options.suffix +
+              '" suffix:'
+          )}\n`
         );
-        log();
-        log(`ℹ️   Use flag "-c TICKER" to select specific blockchain`);
-      },
-      mnemonic: () => {
+      } else if (cw.prefixFound) {
         log(
           `✨  ${green('Done!')} ${blueBright(
-            'Here is your randomly generated 12 words mnemonic string:'
+            'Here is your brand new ' +
+              chainFullName +
+              ' wallet with "' +
+              cw.options.prefix +
+              '" prefix:'
           )}\n`
         );
-        log(`📄  ${generateMnemonicString()}`);
-        log();
+      } else if (cw.suffixFound) {
         log(
-          greenBright(
-            'ℹ️   You can import this wallet into MetaMask, Trust Wallet and many other wallet apps'
-          )
+          `✨  ${green('Done!')} ${blueBright(
+            'Here is your brand new ' +
+              chainFullName +
+              ' wallet with "' +
+              cw.options.suffix +
+              '" suffix:'
+          )}\n`
         );
-      },
-      version: () => {
-        log(_version);
-      },
-      wallet: async () => {
-        const chain = this.params.chain;
-        const options = this.params.options;
-
-        const cw = await new CW(chain, options).init();
-
-        let chainFullName =
-          (cw.row.name || chain) +
-          (cw.wallet.format !== undefined && cw.wallet.format != ''
-            ? ' (' + cw.wallet.format + ')'
-            : '');
-
-        if (cw.options.prefix && !cw.prefixFound) {
-          log(
-            `😢  ${yellow(
-              'Sorry, ' + chainFullName + ' does not support prefix yet...'
-            )}`
-          );
-        }
-
-        if (cw.options.suffix && !cw.suffixFound) {
-          log(
-            `😢  ${yellow(
-              'Sorry, ' + chainFullName + ' does not support suffix yet...'
-            )}`
-          );
-        }
-
-        if (cw.options.mnemonic != '' && cw.wallet.mnemonic == undefined) {
-          log(
-            `😢  ${yellow(
-              'Sorry, ' + chainFullName + ' does not support mnemonic yet...'
-            )}`
-          );
-        }
-
-        if (cw.wallet.error !== undefined) {
-          log(`⛔️  ${red(`Error: ${cw.wallet.error}`)}`);
-          return;
-        }
+      } else {
+        log(
+          `✨  ${green('Done!')} ${blueBright(
+            'Here is your brand new ' + chainFullName + ' wallet:'
+          )}\n`
+        );
+      }
+      linesCount += 1;
+    }
 
-        let linesCount = 0;
-        const outputFormats = ['csv'];
-        const displayAsText =
-          cw.options.output === undefined ||
-          !outputFormats.includes(cw.options.output);
+    // result
+    let outputData = {};
+    if (cw.wallet.addresses !== undefined) {
+      // private key
+      if (cw.wallet.privateExtendedKey && cw.options.geek) {
+        log(`🔐  ${cw.wallet.privateExtendedKey}`);
+        linesCount += 1;
+      }
+      // mnemonic
+      if (cw.wallet.mnemonic) {
+        log(`📄  ${cw.wallet.mnemonic}`);
+        linesCount += 1;
+      }
+      // addresses
+      if (displayAsText) {
+        for (const item of cw.wallet.addresses) {
+          if (cw.wallet.addresses.length > 1) {
+            log();
+            log(`🆔  ${item.index}`);
+          }
 
-        // prefix, suffix
-        if (displayAsText) {
-          if (cw.prefixFound && cw.suffixFound) {
-            log(
-              `✨  ${green('Done!')} ${blueBright(
-                'Here is your brand new ' +
-                  chainFullName +
-                  ' wallet with "' +
-                  cw.options.prefix +
-                  '" prefix and "' +
-                  cw.options.suffix +
-                  '" suffix:'
-              )}\n`
+          if (
+            cw.prefixFound &&
+            cw.prefixFoundInWallets.includes(item.address) &&
+            cw.suffixFound &&
+            cw.suffixFoundInWallets.includes(item.address)
+          ) {
+            // highlight found prefix
+            const addressCutPrefixLength =
+              cw.row.startsWith.length + cw.options.prefix.length;
+            const addressFirstPart = item.address.slice(
+              cw.row.startsWith.length,
+              addressCutPrefixLength
+            );
+            const addressLastPart = item.address.slice(
+              item.address.length - cw.options.suffix.length
             );
-          } else if (cw.prefixFound) {
             log(
-              `✨  ${green('Done!')} ${blueBright(
-                'Here is your brand new ' +
-                  chainFullName +
-                  ' wallet with "' +
-                  cw.options.prefix +
-                  '" prefix:'
-              )}\n`
+              `👛  ${cw.row.startsWith}${magenta(
+                addressFirstPart
+              )}${item.address.substring(
+                cw.row.startsWith.length + addressFirstPart.length,
+                item.address.length - addressLastPart.length
+              )}${magenta(addressLastPart)}`
             );
-          } else if (cw.suffixFound) {
+          } else if (
+            cw.prefixFound &&
+            cw.prefixFoundInWallets.includes(item.address)
+          ) {
+            // highlight found prefix
+            const addressCutLength =
+              cw.row.startsWith.length + cw.options.prefix.length;
             log(
-              `✨  ${green('Done!')} ${blueBright(
-                'Here is your brand new ' +
-                  chainFullName +
-                  ' wallet with "' +
-                  cw.options.suffix +
-                  '" suffix:'
-              )}\n`
+              `👛  ${cw.row.startsWith}${magenta(
+                item.address.slice(cw.row.startsWith.length, addressCutLength)
+              )}${item.address.slice(addressCutLength)}`
             );
-          } else {
+          } else if (
+            cw.suffixFound &&
+            cw.suffixFoundInWallets.includes(item.address)
+          ) {
+            // highlight found suffix
             log(
-              `✨  ${green('Done!')} ${blueBright(
-                'Here is your brand new ' + chainFullName + ' wallet:'
-              )}\n`
+              `👛  ${item.address.slice(
+                0,
+                item.address.length - cw.options.suffix.length
+              )}${magenta(
+                item.address.slice(
+                  item.address.length - cw.options.suffix.length
+                )
+              )}`
             );
+          } else {
+            log(`👛  ${item.address}`);
           }
-          linesCount += 1;
+          log(`🔑  ${item.privateKey}`);
         }
+      } else {
+        outputData.wallets = cw.wallet.addresses;
+      }
 
-        // result
-        let outputData = {};
-        if (cw.wallet.addresses !== undefined) {
-          // private key
-          if (cw.wallet.privateExtendedKey && cw.options.geek) {
-            log(`🔐  ${cw.wallet.privateExtendedKey}`);
-            linesCount += 1;
-          }
-          // mnemonic
-          if (cw.wallet.mnemonic) {
-            log(`📄  ${cw.wallet.mnemonic}`);
-            linesCount += 1;
-          }
-          // addresses
-          if (displayAsText) {
-            for (const item of cw.wallet.addresses) {
-              if (cw.wallet.addresses.length > 1) {
-                log();
-                log(`🆔  ${item.index}`);
-              }
+      if (displayAsText && cw.row.path !== undefined && cw.options.geek) {
+        log();
+        log(`🗂   wallet address path: ${cw.row.path}'/0'/0/ID`);
+        linesCount += 1;
+      }
 
-              if (
-                cw.prefixFound &&
-                cw.prefixFoundInWallets.includes(item.address) &&
-                cw.suffixFound &&
-                cw.suffixFoundInWallets.includes(item.address)
-              ) {
-                // highlight found prefix
-                const addressCutPrefixLength =
-                  cw.row.startsWith.length + cw.options.prefix.length;
-                const addressFirstPart = item.address.slice(
-                  cw.row.startsWith.length,
-                  addressCutPrefixLength
-                );
-                const addressLastPart = item.address.slice(
-                  item.address.length - cw.options.suffix.length
-                );
-                log(
-                  `👛  ${cw.row.startsWith}${magenta(
-                    addressFirstPart
-                  )}${item.address.substring(
-                    cw.row.startsWith.length + addressFirstPart.length,
-                    item.address.length - addressLastPart.length
-                  )}${magenta(addressLastPart)}`
-                );
-              } else if (
-                cw.prefixFound &&
-                cw.prefixFoundInWallets.includes(item.address)
-              ) {
-                // highlight found prefix
-                const addressCutLength =
-                  cw.row.startsWith.length + cw.options.prefix.length;
-                log(
-                  `👛  ${cw.row.startsWith}${magenta(
-                    item.address.slice(
-                      cw.row.startsWith.length,
-                      addressCutLength
-                    )
-                  )}${item.address.slice(addressCutLength)}`
-                );
-              } else if (
-                cw.suffixFound &&
-                cw.suffixFoundInWallets.includes(item.address)
-              ) {
-                // highlight found suffix
-                log(
-                  `👛  ${item.address.slice(
-                    0,
-                    item.address.length - cw.options.suffix.length
-                  )}${magenta(
-                    item.address.slice(
-                      item.address.length - cw.options.suffix.length
-                    )
-                  )}`
-                );
-              } else {
-                log(`👛  ${item.address}`);
-              }
-              log(`🔑  ${item.privateKey}`);
+      // generate csv
+      if (!displayAsText) {
+        const filename =
+          cw.options.csvOutputFilename ||
+          cw.options.filename.split('.')[0] ||
+          'cw-output';
+        // eslint-disable-next-line no-undef
+        const createCsvWriter = CsvWriter.createObjectCsvWriter;
+        const csvWriter = createCsvWriter({
+          path: `${filename}.csv`,
+          header: [
+            {
+              id: 'index',
+              title: 'index',
+            },
+            {
+              id: 'address',
+              title: 'address',
+            },
+            {
+              id: 'privateKey',
+              title: 'privateKey',
+            },
+          ],
+        });
+        csvWriter
+          .writeRecords(outputData.wallets)
+          .then(() =>
+            log(
+              `${linesCount > 0 ? '\n' : ''}🟠  ${yellow(
+                `Don't forget to save the data above manually, because it is not in the output file`
+              )} \n✨  ${green('Done!')} ${blueBright(
+                `The output successfully saved into "./${filename}.csv" file`
+              )}`
+            )
+          )
+          .catch(() =>
+            log(
+              `${linesCount > 0 ? '\n' : ''}⛔️  ${red(
+                `Error: failed to generate a file`
+              )}`
+            )
+          );
+      }
+    }
 
-            }
-          } else {
-            outputData.wallets = cw.wallet.addresses;
-          }
+    if (displayAsText) {
+      if (
+        cw.row.formats !== undefined ||
+        cw.row.network == 'EVM' ||
+        cw.row.apps ||
+        cw.wallet.tested !== undefined
+      ) {
+        log();
+      }
 
-          if (displayAsText && cw.row.path !== undefined && cw.options.geek) {
-            log();
-            log(`🗂   wallet address path: ${cw.row.path}'/0'/0/ID`);
-            linesCount += 1;
-          }
+      if (cw.wallet.tested !== undefined) {
+        log(
+          red(
+            '‼️   This wallet generation format was not tested yet, do not use it!'
+          )
+        );
+      }
 
-          // generate csv
-          if (!displayAsText) {
-            const filename = cw.options.csvOutputFilename || cw.options.filename.split('.')[0] || 'cw-output';
-            // eslint-disable-next-line no-undef
-            const createCsvWriter = CsvWriter.createObjectCsvWriter;
-            const csvWriter = createCsvWriter({
-              path: `${filename}.csv`,
-              header: [
-                {
-                  id: 'index',
-                  title: 'index',
-                },
-                {
-                  id: 'address',
-                  title: 'address',
-                },
-                {
-                  id: 'privateKey',
-                  title: 'privateKey',
-                },
-              ],
-            });
-            csvWriter
-              .writeRecords(outputData.wallets)
-              .then(() =>
-                log(
-                  `${linesCount > 0 ? '\n' : ''}🟠  ${yellow(
-                    `Don't forget to save the data above manually, because it is not in the output file`
-                  )} \n✨  ${green('Done!')} ${blueBright(
-                    `The output successfully saved into "./${filename}.csv" file`
-                  )}`
-                )
-              )
-              .catch(() =>
-                log(
-                  `${linesCount > 0 ? '\n' : ''}⛔️  ${red(
-                    `Error: failed to generate a file`
-                  )}`
-                )
-              );
-          }
+      if (
+        cw.row.formats !== undefined &&
+        Object.keys(cw.row.formats).length > 1
+      ) {
+        let formatsString = '';
+        for (const val of Object.keys(cw.row.formats)) {
+          formatsString += blue(val) + ', ';
         }
+        log(
+          yellow(
+            '*️⃣   You can create different wallet formats: ' +
+              formatsString.substring(0, formatsString.length - 2) +
+              ' (use it with ' +
+              white('-f') +
+              ' flag)'
+          )
+        );
+      }
 
-        if (displayAsText) {
-          if (
-            cw.row.formats !== undefined ||
-            cw.row.network == 'EVM' ||
-            cw.row.apps ||
-            cw.wallet.tested !== undefined
-          ) {
-            log();
-          }
-
-          if (cw.wallet.tested !== undefined) {
-            log(
-              red(
-                '‼️   This wallet generation format was not tested yet, do not use it!'
-              )
-            );
-          }
+      if (cw.row.network == 'EVM' || false) {
+        log(
+          yellow(
+            '🆒  You can use this wallet in Ethereum, Binance Smart Chain, Polygon and few more networks (EVM compatible)'
+          )
+        );
+      }
 
-          if (
-            cw.row.formats !== undefined &&
-            Object.keys(cw.row.formats).length > 1
-          ) {
-            let formatsString = '';
-            for (const val of Object.keys(cw.row.formats)) {
-              formatsString += blue(val) + ', ';
-            }
-            log(
-              yellow(
-                '*️⃣   You can create different wallet formats: ' +
-                  formatsString.substring(0, formatsString.length - 2) +
-                  ' (use it with ' +
-                  white('-f') +
-                  ' flag)'
-              )
-            );
-          }
+      if (cw.row.apps !== undefined) {
+        let apps = {
+          metamask: 'MetaMask',
+          tronlink: 'TronLink',
+          trustwallet: 'Trust Wallet',
+          'harmony-chrome-ext': 'Harmony Chrome Extension Wallet',
+          'binance-chain-wallet': 'Binance Chain Wallet',
+        };
+        let appsArray = [];
 
-          if (cw.row.network == 'EVM' || false) {
-            log(
-              yellow(
-                '🆒  You can use this wallet in Ethereum, Binance Smart Chain, Polygon and few more networks (EVM compatible)'
-              )
-            );
+        for (let key of Object.keys(apps)) {
+          if (cw.row.apps.includes(key)) {
+            appsArray.push(apps[key]);
           }
+        }
 
-          if (cw.row.apps !== undefined) {
-            let apps = {
-              metamask: 'MetaMask',
-              tronlink: 'TronLink',
-              trustwallet: 'Trust Wallet',
-              'harmony-chrome-ext': 'Harmony Chrome Extension Wallet',
-              'binance-chain-wallet': 'Binance Chain Wallet',
-            };
-            let appsArray = [];
-
-            for (let key of Object.keys(apps)) {
-              if (cw.row.apps.includes(key)) {
-                appsArray.push(apps[key]);
-              }
-            }
-
-            let appsString = appsArray.join(', ');
-            if (cw.row.apps || false) {
-              appsString += ' and many other wallet apps';
-            }
-            log(
-              greenBright('ℹ️   You can import this wallet into ' + appsString)
-            );
-          }
+        let appsString = appsArray.join(', ');
+        if (cw.row.apps || false) {
+          appsString += ' and many other wallet apps';
         }
-      },
-    };
+        log(greenBright('ℹ️   You can import this wallet into ' + appsString));
+      }
+    }
+  }
 
-    return (callMethod[this.name] || callMethod['_'])();
+  async init() {
+    return (this.callMethods[this.name] || this.callMethods['_'])();
   }
 }
 
diff --git a/src/Wallet.js b/src/Wallet.js
index 29bdcc3..8ce2117 100644
--- a/src/Wallet.js
+++ b/src/Wallet.js
@@ -1,35 +1,24 @@
 import { log } from './utils.js';
 import chalk from 'chalk';
-const { red } = chalk;
 import CoinKey from 'coinkey';
 import CoinInfo from 'coininfo';
 import bip39 from 'bip39';
 import bip84 from 'bip84';
-const {
-  fromMnemonic,
-  fromZPrv,
-} = bip84;
+const { fromMnemonic, fromZPrv } = bip84;
 import ethereumBip from 'ethereum-bip84';
-const {
-  fromMnemonic: fromMnemonicEthereum,
-  fromZPrv: fromZPrvEthereum,
-} = ethereumBip;
+const { fromMnemonic: fromMnemonicEthereum, fromZPrv: fromZPrvEthereum } =
+  ethereumBip;
 import dogecoinBip from '@yerofey/dogecoin-bip84';
-const {
-  fromMnemonic: fromMnemonicDoge,
-  fromZPrv: fromZPrvDoge
-} = dogecoinBip;
+const { fromMnemonic: fromMnemonicDoge, fromZPrv: fromZPrvDoge } = dogecoinBip;
 import litecoinBip from '@yerofey/litecoin-bip84';
-const {
-  fromMnemonic: fromMnemonicLite,
-  fromZPrv: fromZPrvLite,
-} = litecoinBip;
+const { fromMnemonic: fromMnemonicLite, fromZPrv: fromZPrvLite } = litecoinBip;
 import { Account } from 'eth-lib/lib/index.js';
 import { Wallet as HarmonyWallet } from '@harmony-js/account';
 import pkutils from 'ethereum-mnemonic-privatekey-utils';
 import bCrypto from '@binance-chain/javascript-sdk/lib/crypto/index.js';
 import tronWeb from 'tronweb';
 import tezos from 'tezos-sign';
+const { red } = chalk;
 
 class Wallet {
   constructor(cw) {
@@ -312,8 +301,9 @@ class Wallet {
         };
       }
 
-      const _fromMnemonic = (chain == 'DOGE') ? fromMnemonicDoge : fromMnemonicLite;
-      const _fromZPrv = (chain == 'DOGE') ? fromZPrvDoge : fromZPrvLite;
+      const _fromMnemonic =
+        chain == 'DOGE' ? fromMnemonicDoge : fromMnemonicLite;
+      const _fromZPrv = chain == 'DOGE' ? fromZPrvDoge : fromZPrvLite;
       const mnemonic = mnemonicString || bip39.generateMnemonic();
       const root = new _fromMnemonic(mnemonic, '');
       const child = root.deriveAccount(0);
@@ -487,7 +477,4 @@ function generateMnemonicString() {
   return bip39.generateMnemonic();
 }
 
-const _generateMnemonicString = generateMnemonicString;
-export { _generateMnemonicString as generateMnemonicString };
-const _Wallet = Wallet;
-export { _Wallet as Wallet };
+export { generateMnemonicString, Wallet };
diff --git a/src/options.js b/src/options.js
new file mode 100644
index 0000000..a057b90
--- /dev/null
+++ b/src/options.js
@@ -0,0 +1,43 @@
+import { program } from 'commander';
+
+
+program.option('-b, --chain <ticker>', 'Wallet for specific blockchain', 'ERC');
+program.option('-c, --chain <ticker>', 'Wallet for specific blockchain', 'ERC');
+program.option(
+  '-D, --csv [filename]',
+  'Save result into CSV file'
+);
+program.option(
+  '-f, --format <format>',
+  'Wallet format type (for cryptos with multiple wallet formats)'
+);
+program.option(
+  '-F, --filename <filename>',
+  'Filename to output the data (works with -o argument)'
+);
+program.option('-g, --geek', 'Display some more info (geeky)');
+program.option('-l, --list', 'List all supported cryptos');
+program.option(
+  '-m, --mnemonic [mnemonic]',
+  'Generate wallet from mnemonic string OR just a mnemonic string'
+);
+program.option(
+  '-n, --number <number>',
+  'Number of wallets to generate (if supported)'
+);
+program.option('-o, --output <format>', 'Return results into some file');
+program.option('-p, --prefix <prefix>', 'Desired wallet prefix');
+program.option(
+  '-P, --prefix-sensitive <prefix>',
+  'Desired wallet prefix (case-sensitive)'
+);
+program.option('-s, --suffix <suffix>', 'Desired wallet suffix');
+program.option(
+  '-S, --suffix-sensitive <suffix>',
+  'Desired wallet suffix (case-sensitive)'
+);
+program.option('-v, --version', 'Display cryptowallet version');
+program.parse();
+
+export const options = program.opts();
+export const zeroOptions = Object.keys(options).length === 0;
diff --git a/src/utils.js b/src/utils.js
index 55373c8..7afc2f8 100644
--- a/src/utils.js
+++ b/src/utils.js
@@ -21,12 +21,8 @@ const loadFile = async (filename, defaultValue = {}) => {
 };
 
 const loadJson = async (filename) => {
-  return JSON.parse(
-    await readFile(
-      new URL(filename, import.meta.url)
-    )
-  );
-}
+  return JSON.parse(await readFile(new URL(filename, import.meta.url)));
+};
 
 const objectHasAllKeys = (obj, keysArray) =>
   // eslint-disable-next-line no-prototype-builtins
@@ -34,17 +30,11 @@ const objectHasAllKeys = (obj, keysArray) =>
 
 let supportedChains = [];
 // eslint-disable-next-line no-undef
-const chainsFolder = `${path.dirname(decodeURIComponent(import.meta.url))}/chains/`.replace('file://', '');
-filesList(chainsFolder).forEach((item) => {
-  const name = item.replace(chainsFolder, '').replace('.json', '');
-  supportedChains.push(name);
-});
+const chainsFolder = `${path.dirname(
+  decodeURIComponent(import.meta.url)
+)}/chains/`.replace('file://', '');
+supportedChains = filesList(chainsFolder).map((item) =>
+  item.replace(chainsFolder, '').replace('.json', '')
+);
 
-const _log = log;
-export { _log as log };
-export { loadFile };
-export { loadJson };
-const _objectHasAllKeys = objectHasAllKeys;
-export { _objectHasAllKeys as objectHasAllKeys };
-const _supportedChains = supportedChains;
-export { _supportedChains as supportedChains };
+export { log, loadFile, loadJson, objectHasAllKeys, supportedChains };