A multiplatform long-polling example that recreates received content in the same chat. Shared behavior lives in ResenderBotLib; JVM, browser/JS, and native entry points start it in platform-specific ways.

Resend behavior

The bot defines no commands. For each content message, it shows a typing action and uses createResend to send equivalent content back to the originating chat. When present, it carries over the replied-to message metadata, text quote entities and position, and the message effect ID.

Business content sent by the business-connection owner is ignored; other delivered content messages are eligible. Processing is separated by chat. The bot prints each received update and each resend result, and reports its getMe result through the launcher's output callback.

Source sets and launchers

ResenderBotLib/commonMain provides the public activateResenderBot function and all Telegram handlers for JVM, JS, and native consumers.
ResenderBotLib/jsMain provides a browser form. Each submission starts another bot and displays callback output in its own page element; console output remains in the browser developer tools.
jvm_launcher provides a suspending CLI entry point and optional debug logging.
native_launcher wraps the shared suspending function in runBlocking. Its shared native template selects Linux x64/Arm64 or Windows x64 for the host.

Setup and permissions

Create a bot, obtain its token, and keep it private. Start a private chat with the bot or add it to a chat where Telegram will deliver the desired content. The bot must be allowed to send each content type it should reproduce; no administrator-only methods are used. Long polling is used, so run only one launcher per token.

The browser form handles the token in client-side code and uses a plain text input. Use it only on a trusted local page, submit once, and close the page when finished. Linux native builds also require the repository's documented libcurl dependency.

Run from the repository root

JVM

The first argument is the required token. debug is recognized only as the second argument; later arguments are ignored.

./gradlew :ResenderBot:jvm_launcher:run --args="BOT_TOKEN"
./gradlew :ResenderBot:jvm_launcher:run --args="BOT_TOKEN debug"

Browser/JS

./gradlew :ResenderBot:ResenderBotLib:jsBrowserDevelopmentRun

Enter the token in the page form and select Start bot. There are no browser command-line arguments.

Kotlin/Native

Build the host-specific debug executable, then pass the required token directly to it. Additional native arguments are ignored.

./gradlew :ResenderBot:native_launcher:linkDebugExecutableNative
./ResenderBot/native_launcher/build/bin/native/debugExecutable/native_launcher.kexe "BOT_TOKEN"

On Windows, run ResenderBot\\native_launcher\\build\\bin\\native\\debugExecutable\\native_launcher.exe "BOT_TOKEN" after the same Gradle link task. macOS hosts are not configured by the native launcher template.