feat: complete rewrite

.prettierrc

@@ -1,4 +1,4 @@
 {
-  "trailingComma": "none",
+  "trailingComma": "all",
   "singleQuote": true
 }

lib/decorators/index.ts

@@ -1,3 +1,3 @@
-export * from './pipe-context.decorator'
-export * from './telegram-action-handler.decorator'
-export * from './telegram-catch.decorator'
+export * from './telegraf-on.decorator';
+export * from './telegraf-hears.decorator';
+export * from './telegraf-start.decorator';

lib/decorators/pipe-context.decorator.ts

@@ -1,18 +0,0 @@
-import { Type } from '@nestjs/common'
-import { ContextTransformer } from '../interfaces'
-import { addHandlerToStore } from './'
-
-export const PipeContext = <T>(transform: Type<ContextTransformer<T>>) => (
-  target: Object,
-  propertyKey: string,
-  parameterIndex: number,
-) => {
-  addHandlerToStore(target, propertyKey, {
-    transformations: [
-      {
-        index: parameterIndex,
-        transform,
-      },
-    ],
-  })
-}

lib/decorators/telegraf-hears.decorator.ts

@@ -0,0 +1,13 @@
+import { SetMetadata } from '@nestjs/common';
+import { DECORATORS } from '../telegraf.constants';
+import { HearsTriggers } from 'telegraf';
+
+/**
+ * Registers middleware for handling text messages.
+ * @param triggers Triggers
+ *
+ * https://telegraf.js.org/#/?id=hears
+ */
+export function TelegrafHears(triggers: HearsTriggers): MethodDecorator {
+  return SetMetadata(DECORATORS.HEARS, { triggers: triggers });
+}

lib/decorators/telegraf-on.decorator.ts

@@ -0,0 +1,15 @@
+import { SetMetadata } from '@nestjs/common';
+import { DECORATORS } from '../telegraf.constants';
+import { UpdateType, MessageSubTypes } from 'telegraf/typings/telegram-types';
+
+/**
+ * Registers middleware for provided update type.
+ * @param updateTypes Update type
+ *
+ * https://telegraf.js.org/#/?id=on
+ */
+export function TelegrafOn(
+  updateTypes: UpdateType | UpdateType[] | MessageSubTypes | MessageSubTypes[],
+): MethodDecorator {
+  return SetMetadata(DECORATORS.ON, { updateTypes: updateTypes });
+}

lib/decorators/telegraf-start.decorator.ts

@@ -0,0 +1,11 @@
+import { SetMetadata } from '@nestjs/common';
+import { DECORATORS } from '../telegraf.constants';
+
+/**
+ * Handler for /start command.
+ *
+ * https://telegraf.js.org/#/?id=start
+ */
+export function TelegrafStart(): MethodDecorator {
+  return SetMetadata(DECORATORS.START, {});
+}

lib/decorators/telegram-action-handler.decorator.ts

@@ -1,44 +0,0 @@
-import { HandleParameters } from '../interfaces'
-
-type Decorator = (
-  params: HandleParameters,
-) => (target: any, propertyKey: string, descriptor: PropertyDescriptor) => void
-
-type HandlerDecorator = Decorator & {
-  handlers?: Map<any, Map<string, HandleParameters>>
-}
-
-export const TelegramActionHandler: HandlerDecorator = (
-  parameters: HandleParameters,
-) => (target: any, propertyKey: string) => {
-  // eslint-disable-next-line no-use-before-define
-  addHandlerToStore(target, propertyKey, parameters)
-}
-
-export const addHandlerToStore = (
-  instance: Object,
-  name: string,
-  config: HandleParameters,
-) => {
-  const handlerClass = instance.constructor
-
-  if (!TelegramActionHandler.handlers) {
-    TelegramActionHandler.handlers = new Map()
-  }
-
-  if (!TelegramActionHandler.handlers.get(handlerClass)) {
-    TelegramActionHandler.handlers.set(handlerClass, new Map())
-  }
-
-  const oldParameters =
-    TelegramActionHandler.handlers.get(handlerClass).get(name) || {}
-
-  TelegramActionHandler.handlers.get(handlerClass).set(name, {
-    ...oldParameters,
-    ...config,
-    transformations: [
-      ...(oldParameters.transformations || []),
-      ...(config.transformations || []),
-    ],
-  })
-}

lib/decorators/telegram-catch.decorator.ts

@@ -1,18 +0,0 @@
-import { Type } from '@nestjs/common'
-import { TelegramErrorHandler } from '../interfaces'
-
-type Decorator = (error: any) => ClassDecorator
-
-type HandlerDecorator = Decorator & {
-  handlers?: Map<Error, Type<TelegramErrorHandler>>
-}
-
-export const TelegramCatch: HandlerDecorator = error => target => {
-  if (!TelegramCatch.handlers) {
-    TelegramCatch.handlers = new Map()
-  }
-
-  TelegramCatch.handlers.set(error, target as any)
-
-  return target
-}

lib/exeptions/index.ts

@@ -1 +0,0 @@
-export * from './invalid-configuration.exeption'

lib/exeptions/invalid-configuration.exeption.ts

@@ -1,10 +0,0 @@
-export class InvalidConfigurationException extends Error {
-  public constructor(
-    public readonly invalidField,
-    public readonly invalidCause,
-  ) {
-    super(
-      `Options validation failed, "${invalidField}" invalid — ${invalidCause}`,
-    )
-  }
-}

lib/index.ts

@@ -1,5 +1,3 @@
-export * from './telegraf.module'
-export * from './interfaces'
-export * from './decorators'
-export * from './telegraf.service'
-export * from './telegraf-telegram.service'
+export * from './telegraf.module';
+export * from './interfaces';
+export * from './decorators';

lib/interfaces/context-transformer.interface.ts

@@ -1,5 +0,0 @@
-import { ContextMessageUpdate } from 'telegraf'
-
-export interface ContextTransformer<T = any> {
-  transform: (ctx: ContextMessageUpdate) => Promise<T>
-}

lib/interfaces/handle-parameters.interface.ts

@@ -1,18 +0,0 @@
-import { ContextTransformer } from './'
-import { HearsTriggers } from 'telegraf'
-import { UpdateType, MessageSubTypes } from 'telegraf/typings/telegram-types'
-import { Type } from '@nestjs/common'
-
-interface ArgumentTransformation {
-  index: number
-  transform: Type<ContextTransformer>
-}
-
-export interface HandleParameters {
-  onStart?: boolean
-  on?: UpdateType | UpdateType[] | MessageSubTypes | MessageSubTypes[]
-  command?: string
-  message?: string | RegExp
-  action?: HearsTriggers
-  transformations?: ArgumentTransformation[]
-}

lib/interfaces/handler.interface.ts

@@ -1,6 +0,0 @@
-import { HandleParameters } from './'
-
-export interface Handler {
-  handle: (...args: any[]) => Promise<void>
-  config: HandleParameters
-}

lib/interfaces/index.ts

@@ -1,5 +1 @@
-export * from './telegraf-options.interface'
-export * from './handler.interface'
-export * from './handle-parameters.interface'
-export * from './telegram-error-handler.interface'
-export * from './context-transformer.interface'
+export * from './telegraf-options.interface';

lib/interfaces/telegraf-options.interface.ts

@@ -1,22 +1,21 @@
-import { ModuleMetadata, Type } from '@nestjs/common/interfaces'
-import { TelegrafOptions } from 'telegraf'
+import { ModuleMetadata, Type } from '@nestjs/common/interfaces';
+import { TelegrafOptions } from 'telegraf';
 
 export interface TelegrafModuleOptions {
-  token: string
-  sitePublicUrl?: string
-  telegrafOptions?: TelegrafOptions
+  token: string;
+  options?: TelegrafOptions;
 }
 
 export interface TelegrafOptionsFactory {
-  createTelegrafOptions(): TelegrafModuleOptions
+  createTelegrafOptions(): TelegrafModuleOptions;
 }
 
 export interface TelegrafModuleAsyncOptions
   extends Pick<ModuleMetadata, 'imports'> {
-  useExisting?: Type<TelegrafOptionsFactory>
-  useClass?: Type<TelegrafOptionsFactory>
+  useExisting?: Type<TelegrafOptionsFactory>;
+  useClass?: Type<TelegrafOptionsFactory>;
   useFactory?: (
     ...args: any[]
-  ) => Promise<TelegrafModuleOptions> | TelegrafModuleOptions
-  inject?: any[]
+  ) => Promise<TelegrafModuleOptions> | TelegrafModuleOptions;
+  inject?: any[];
 }

lib/interfaces/telegram-error-handler.interface.ts

@@ -1,5 +0,0 @@
-import { ContextMessageUpdate } from 'telegraf'
-
-export interface TelegramErrorHandler<E = any> {
-  catch(ctx: ContextMessageUpdate, error: E): Promise<void>
-}

lib/telegraf-core.module.ts

@@ -0,0 +1,83 @@
+import { Module, DynamicModule, Provider, Type } from '@nestjs/common';
+import {
+  TelegrafModuleOptions,
+  TelegrafModuleAsyncOptions,
+  TelegrafOptionsFactory,
+} from './interfaces';
+import {
+  TELEGRAF_MODULE_OPTIONS,
+  TELEGRAF_PROVIDER,
+} from './telegraf.constants';
+import { TelegrafMetadataAccessor } from './telegraf-metadata.accessor';
+import { TelegrafExplorer } from './telegraf.explorer';
+import { DiscoveryModule } from '@nestjs/core';
+import { TelegrafProvider } from './telegraf.provider';
+
+@Module({
+  imports: [DiscoveryModule],
+  providers: [TelegrafMetadataAccessor, TelegrafExplorer],
+})
+export class TelegrafCoreModule {
+  public static forRoot(options: TelegrafModuleOptions): DynamicModule {
+    return {
+      module: TelegrafCoreModule,
+      providers: [],
+      exports: [],
+    };
+  }
+
+  public static forRootAsync(
+    options: TelegrafModuleAsyncOptions,
+  ): DynamicModule {
+    const telegrafProvider = {
+      provide: TELEGRAF_PROVIDER,
+      useClass: TelegrafProvider,
+      inject: [TELEGRAF_MODULE_OPTIONS],
+    };
+    const asyncProviders = this.createAsyncProviders(options);
+    return {
+      module: TelegrafCoreModule,
+      imports: options.imports,
+      providers: [...asyncProviders, telegrafProvider],
+      exports: [telegrafProvider],
+    };
+  }
+
+  private static createAsyncProviders(
+    options: TelegrafModuleAsyncOptions,
+  ): Provider[] {
+    if (options.useExisting || options.useFactory) {
+      return [this.createAsyncOptionsProvider(options)];
+    }
+    const useClass = options.useClass as Type<TelegrafOptionsFactory>;
+    return [
+      this.createAsyncOptionsProvider(options),
+      {
+        provide: useClass,
+        useClass,
+      },
+    ];
+  }
+
+  private static createAsyncOptionsProvider(
+    options: TelegrafModuleAsyncOptions,
+  ): Provider {
+    if (options.useFactory) {
+      return {
+        provide: TELEGRAF_MODULE_OPTIONS,
+        useFactory: options.useFactory,
+        inject: options.inject || [],
+      };
+    }
+    // `as Type<TelegrafOptionsFactory>` is a workaround for microsoft/TypeScript#31603
+    const inject = [
+      (options.useClass || options.useExisting) as Type<TelegrafOptionsFactory>,
+    ];
+    return {
+      provide: TELEGRAF_MODULE_OPTIONS,
+      useFactory: async (optionsFactory: TelegrafOptionsFactory) =>
+        await optionsFactory.createTelegrafOptions(),
+      inject,
+    };
+  }
+}

lib/telegraf-metadata.accessor.ts

@@ -0,0 +1,38 @@
+import { Injectable, Type } from '@nestjs/common';
+import { Reflector } from '@nestjs/core';
+import { TelegrafStart } from './decorators';
+import { DECORATORS } from './telegraf.constants';
+
+@Injectable()
+export class TelegrafMetadataAccessor {
+  constructor(private readonly reflector: Reflector) {}
+
+  isTelegrafStart(target: Type<any> | Function): boolean {
+    if (!target) {
+      return false;
+    }
+    return !!this.reflector.get(DECORATORS.START, target);
+  }
+
+  isTelegrafOn(target: Type<any> | Function): boolean {
+    if (!target) {
+      return false;
+    }
+    return !!this.reflector.get(DECORATORS.ON, target);
+  }
+
+  getTelegrafOnMetadata(target: Type<any> | Function) {
+    return this.reflector.get(DECORATORS.ON, target);
+  }
+
+  isTelegrafHears(target: Type<any> | Function): boolean {
+    if (!target) {
+      return false;
+    }
+    return !!this.reflector.get(DECORATORS.HEARS, target);
+  }
+
+  getTelegrafHearsMetadata(target: Type<any> | Function) {
+    return this.reflector.get(DECORATORS.HEARS, target);
+  }
+}

lib/telegraf-telegram.service.ts

@@ -1,13 +0,0 @@
-import { Injectable, Inject } from '@nestjs/common';
-const Telegram = require('telegraf/telegram');
-import { Telegram as TelegramClient } from 'telegraf';
-
-import { TELEGRAF_MODULE_OPTIONS } from './telegraf.constants';
-import { TelegrafModuleOptions } from './interfaces';
-
-@Injectable()
-export class TelegrafTelegramService extends TelegramClient {
-  constructor(@Inject(TELEGRAF_MODULE_OPTIONS) options: TelegrafModuleOptions) {
-    super(options.token, {});
-  }
-}

lib/telegraf.constants.ts

@@ -1,2 +1,9 @@
-export const TELEGRAF_MODULE_OPTIONS = 'TELEGRAF_MODULE_OPTIONS'
-export const TokenInjectionToken = Symbol('TokenInjectionToken')
+export const TELEGRAF_MODULE_OPTIONS = 'TELEGRAF_MODULE_OPTIONS';
+export const TELEGRAF_PROVIDER = 'TELEGRAF_PROVIDER';
+
+export const DECORATORS_PREFIX = 'TELEGRAF';
+export const DECORATORS = {
+  ON: `${DECORATORS_PREFIX}/ON`,
+  HEARS: `${DECORATORS_PREFIX}/HEARS`,
+  START: `${DECORATORS_PREFIX}/START`,
+};

lib/telegraf.explorer.ts

@@ -0,0 +1,85 @@
+import { Injectable, OnModuleInit } from '@nestjs/common';
+import { DiscoveryService, ModuleRef } from '@nestjs/core';
+import { InstanceWrapper } from '@nestjs/core/injector/instance-wrapper';
+import { MetadataScanner } from '@nestjs/core/metadata-scanner';
+import Telegraf from 'telegraf';
+import { TelegrafMetadataAccessor } from './telegraf-metadata.accessor';
+import { TelegrafProvider } from './telegraf.provider';
+import { TELEGRAF_PROVIDER } from './telegraf.constants';
+import { ContextMessageUpdate } from 'telegraf';
+
+@Injectable()
+export class TelegrafExplorer implements OnModuleInit {
+  constructor(
+    private readonly moduleRef: ModuleRef,
+    private readonly discoveryService: DiscoveryService,
+    private readonly metadataAccessor: TelegrafMetadataAccessor,
+    private readonly metadataScanner: MetadataScanner,
+  ) {}
+
+  onModuleInit() {
+    this.explore();
+  }
+
+  explore() {
+    const providers: InstanceWrapper[] = this.discoveryService.getProviders();
+    providers.forEach((wrapper: InstanceWrapper) => {
+      const { instance } = wrapper;
+
+      if (!instance) {
+        return;
+      }
+
+      const telegraf = this.moduleRef.get<TelegrafProvider<any>>(
+        TELEGRAF_PROVIDER,
+        { strict: false },
+      );
+
+      this.metadataScanner.scanFromPrototype(
+        instance,
+        Object.getPrototypeOf(instance),
+        (key: string) => {
+          if (this.metadataAccessor.isTelegrafStart(instance[key])) {
+            this.handleTelegrafStart(instance, key, telegraf);
+          } else if (this.metadataAccessor.isTelegrafOn(instance[key])) {
+            const metadata = this.metadataAccessor.getTelegrafOnMetadata(
+              instance[key],
+            );
+            this.handleTelegrafOn(instance, key, telegraf, metadata);
+          } else if (this.metadataAccessor.isTelegrafHears(instance[key])) {
+            const metadata = this.metadataAccessor.getTelegrafHearsMetadata(
+              instance[key],
+            );
+            this.handleTelegrafHears(instance, key, telegraf, metadata);
+          }
+        },
+      );
+    });
+  }
+
+  handleTelegrafOn(
+    instance: object,
+    key: string,
+    telegraf: Telegraf<ContextMessageUpdate>,
+    metadata: any,
+  ) {
+    telegraf.on(metadata.updateTypes, instance[key].bind(instance));
+  }
+
+  handleTelegrafStart(
+    instance: object,
+    key: string,
+    telegraf: Telegraf<ContextMessageUpdate>,
+  ) {
+    telegraf.start(instance[key].bind(instance));
+  }
+
+  handleTelegrafHears(
+    instance: object,
+    key: string,
+    telegraf: Telegraf<ContextMessageUpdate>,
+    metadata: any,
+  ) {
+    telegraf.hears(metadata.triggers, instance[key].bind(instance));
+  }
+}

lib/telegraf.module.ts

@@ -1,63 +1,25 @@
-import { Module, DynamicModule, Provider } from '@nestjs/common';
+import { Module, DynamicModule } from '@nestjs/common';
+import { TelegrafCoreModule } from './telegraf-core.module';
 import {
+  TelegrafModuleOptions,
   TelegrafModuleAsyncOptions,
-  TelegrafOptionsFactory
 } from './interfaces';
-import {
-  TELEGRAF_MODULE_OPTIONS,
-  TokenInjectionToken
-} from './telegraf.constants';
-import { TelegrafService, TelegrafTelegramService } from './';
 
 @Module({})
 export class TelegrafModule {
-  static fromFactory(options: TelegrafModuleAsyncOptions): DynamicModule {
+  public static forRoot(options?: TelegrafModuleOptions): DynamicModule {
     return {
       module: TelegrafModule,
-      imports: options.imports || [],
-      providers: [
-        ...this.createAsyncProviders(options),
-        TelegrafService,
-        TelegrafTelegramService,
-        {
-          provide: TokenInjectionToken,
-          useClass: options.useClass
-        }
-      ],
-      exports: [TelegrafService, TelegrafTelegramService]
+      imports: [TelegrafCoreModule.forRoot(options)],
     };
   }
 
-  private static createAsyncProviders(
-    options: TelegrafModuleAsyncOptions
-  ): Provider[] {
-    if (options.useExisting || options.useFactory) {
-      return [this.createAsyncOptionsProvider(options)];
-    }
-    return [
-      this.createAsyncOptionsProvider(options),
-      {
-        provide: options.useClass,
-        useClass: options.useClass
-      }
-    ];
-  }
-
-  private static createAsyncOptionsProvider(
-    options: TelegrafModuleAsyncOptions
-  ): Provider {
-    if (options.useFactory) {
+  public static forRootAsync(
+    options: TelegrafModuleAsyncOptions,
+  ): DynamicModule {
     return {
-        provide: TELEGRAF_MODULE_OPTIONS,
-        useFactory: options.useFactory,
-        inject: options.inject || []
-      };
-    }
-    return {
-      provide: TELEGRAF_MODULE_OPTIONS,
-      useFactory: async (optionsFactory: TelegrafOptionsFactory) =>
-        await optionsFactory.createTelegrafOptions(),
-      inject: [options.useExisting || options.useClass]
+      module: TelegrafModule,
+      imports: [TelegrafCoreModule.forRootAsync(options)],
     };
   }
 }

lib/telegraf.provider.ts

@@ -0,0 +1,28 @@
+import {
+  Injectable,
+  Inject,
+  OnApplicationBootstrap,
+  Logger,
+} from '@nestjs/common';
+import Telegraf, { ContextMessageUpdate } from 'telegraf';
+import { TELEGRAF_MODULE_OPTIONS } from './telegraf.constants';
+import { TelegrafModuleOptions } from './interfaces';
+
+@Injectable()
+// @ts-ignore
+export class TelegrafProvider<TContext extends ContextMessageUpdate>
+  extends Telegraf<TContext>
+  implements OnApplicationBootstrap {
+  private logger = new Logger('Telegraf');
+
+  constructor(@Inject(TELEGRAF_MODULE_OPTIONS) options: TelegrafModuleOptions) {
+    super(options.token, options.options);
+  }
+
+  onApplicationBootstrap() {
+    this.catch(e => {
+      this.logger.error(e);
+    });
+    this.startPolling();
+  }
+}

lib/telegraf.service.ts

@@ -1,183 +0,0 @@
-import { Inject, Injectable, Logger } from '@nestjs/common'
-import { ModuleRef } from '@nestjs/core'
-import { flatten, head } from 'lodash'
-import Telegraf, { ContextMessageUpdate } from 'telegraf'
-import { TelegramActionHandler, TelegramCatch } from './decorators'
-import { InvalidConfigurationException } from './exeptions'
-import {
-  ContextTransformer,
-  Handler,
-  TelegrafOptionsFactory,
-  TelegramErrorHandler,
-} from './interfaces'
-import { TokenInjectionToken } from './telegraf.constants'
-
-@Injectable()
-export class TelegrafService {
-  private readonly logger = new Logger(TelegrafService.name, true)
-  private readonly sitePublicUrl?: string
-  public readonly bot: Telegraf<ContextMessageUpdate>
-  private ref: ModuleRef
-
-  public constructor(
-    @Inject(TokenInjectionToken) options: TelegrafOptionsFactory
-  ) {
-    const {
-      token,
-      sitePublicUrl,
-      telegrafOptions,
-    } = options.createTelegrafOptions()
-    this.sitePublicUrl = sitePublicUrl
-    this.bot = new Telegraf(token, telegrafOptions)
-  }
-
-  public init(ref: ModuleRef, devMode: boolean = false) {
-    this.ref = ref
-
-    const handlers = this.createHandlers()
-
-    this.setupOnStart(handlers)
-    this.setupOn(handlers)
-    this.setupOnMessage(handlers)
-    this.setupOnCommand(handlers)
-    this.setupActions(handlers)
-
-    if (devMode) {
-      this.startPolling()
-    }
-  }
-
-  public getMiddleware(path: string) {
-    if (!this.sitePublicUrl) {
-      throw new InvalidConfigurationException(
-        'sitePublicUrl',
-        'does not exist, but webook used'
-      )
-    }
-
-    const url = `${this.sitePublicUrl}/${path}`
-
-    this.bot.telegram
-      .setWebhook(url)
-      .then(() => this.logger.log(`Webhook set success @ ${url}`))
-
-    return this.bot.webhookCallback(`/${path}`)
-  }
-
-  public startPolling() {
-    this.bot.telegram.deleteWebhook().then(
-      () => this.bot.startPolling(),
-      () => {
-        // okay, never mind
-      }
-    )
-  }
-
-  private createHandlers(): Handler[] {
-    return flatten(
-      Array.from((TelegramActionHandler.handlers || new Map()).entries()).map(
-        ([handlerClass, classConfig]) => {
-          const handlerInstance = this.ref.get(handlerClass, { strict: false })
-
-          return Array.from(classConfig.entries()).map(
-            ([methodName, methodCondig]) => ({
-              handle: handlerInstance[methodName].bind(handlerInstance),
-              config: methodCondig,
-            })
-          )
-        }
-      )
-    )
-  }
-
-  private setupOnStart(handlers: Handler[]): void {
-    const onStart = handlers.filter(({ config }) => config.onStart)
-
-    if (onStart.length !== 1) {
-      throw new Error()
-    }
-
-    this.bot.start(this.adoptHandle(head(onStart)))
-  }
-
-  private setupOn(handlers: Handler[]): void {
-    const onHandlers = handlers.filter(({ config }) => config.on)
-
-    onHandlers.forEach(handler => {
-      this.bot.on(handler.config.on, this.adoptHandle(handler))
-    })
-  }
-
-  private setupOnMessage(handlers: Handler[]): void {
-    const onMessageHandlers = handlers.filter(
-      ({ config }) => config.message !== undefined
-    )
-
-    onMessageHandlers.forEach(handler => {
-      if (handler.config.message) {
-        this.bot.hears(handler.config.message, this.adoptHandle(handler))
-      } else {
-        this.bot.on('message', this.adoptHandle(handler))
-      }
-    })
-  }
-
-  private setupOnCommand(handlers: Handler[]): void {
-    const commandHandlers = handlers.filter(({ config }) => config.command)
-
-    commandHandlers.forEach(handler => {
-      this.bot.command(handler.config.command, this.adoptHandle(handler))
-    })
-  }
-
-  private setupActions(handlers: Handler[]): void {
-    const commandHandlers = handlers.filter(({ config }) => config.action)
-
-    commandHandlers.forEach(handler => {
-      this.bot.action(handler.config.action, this.adoptHandle(handler))
-    })
-  }
-
-  private adoptHandle({ handle, config }: Handler) {
-    const errorHandler = this.createCatch()
-
-    return async (ctx: ContextMessageUpdate) => {
-      const args = await Promise.all(
-        (config.transformations || [])
-          .sort((a, b) => a.index - b.index)
-          .map(({ transform }) =>
-            this.ref
-              .get<ContextTransformer>(transform, { strict: false })
-              .transform(ctx)
-          )
-      )
-
-      return handle(ctx, ...args).catch(errorHandler(ctx))
-    }
-  }
-
-  private createCatch() {
-    const handlers = Array.from(
-      (TelegramCatch.handlers || new Map()).entries()
-    ).map(([errorType, handlerType]) => {
-      const handler = this.ref.get<TelegramErrorHandler>(handlerType, {
-        strict: false,
-      })
-
-      return {
-        errorType,
-        handler,
-      }
-    })
-
-    return (ctx: ContextMessageUpdate) => (e: any) => {
-      for (const { errorType, handler } of handlers) {
-        if (e instanceof (errorType as any)) {
-          return handler.catch(ctx, e)
-        }
-      }
-
-      throw e
-    }
-  }
-}