In/Into Exchange Bot

Telegram bot for easy currency conversion with extensive features.

See @inintobot

Deployment

The implementation consists of the following components:

1. buildSrc - project with Gradle build-scripts
2. common - common utilities and interfaces, also objects containing list of available currencies and rate apis.
3. fetch-rates - function which downloads the latest rates and populates the designated store (supposed to be running on schedule)
   See class org.mksn.inintobot.rates.FetchRequest for input object parameters
4. exchange-rates - main module which containing bot logic
5. migrate-settings - one-time function which designated to migrate existing settings from Postgres SQL.
   See class org.mksn.inintobot.migrate.MigrateInput for input object parameters To deploy:

   gcloud functions deploy inintobot-exchange-rates \ 
     --entry-point=org.mksn.inintobot.gcp.function.Function \
     --memory=512MB --runtime=java11 --trigger-http --source=build/libs \
     --region=europe-central2

6. componud-server - project which connects fetch-rates and exchange-rates functions into a single executable server Require envs from both fetch-rates and exchange-rates projects to be set
7. platform-gcp - set of platform-related projects (or just configurations) to deploy the bot on GCP and save data into Firestore
   • app-engine - GCP version of compund-server project. Fill app.yaml with required envs.
   • function - adapter implementation between common function interface and GCP cloud functions interface
   • store - GCP Firestore implementation of common storage interfaces
   • function-exchange-rates - GCP version of exchange-rates project. To deploy:

     gcloud functions deploy inintobot-exchange-rates \
       --entry-point=org.mksn.inintobot.gcp.function.Function \
       --memory=512MB --runtime=java11 --trigger-http --source=build/libs \
       --region=europe-central2 --min-instances=1 \
       --set-env-vars BOT_TOKEN=<bot token>,BOT_USERNAME=<bot username>,CREATOR_ID=<id of admin>

   • function-fetch-rates - GCP version of exchange-rates project. To deploy:

     gcloud functions deploy inintobot-fetch-rates \
       --entry-point=org.mksn.inintobot.gcp.function.Function \
       --memory=512MB --runtime=java11 --trigger-http --source=build/libs \
       --region=europe-central2 \
       --set-env-vars FIXER_ACCESS_KEY=<token>,FOREX_ACCESS_KEY=<token>,OPENEXCHANGERATES_ACCESS_KEY=<token>,TRADERMADE_ACCESS_KEY=<token>

   • function-migrate-settings - GCP version of migrate-settings project. To deploy:

     gcloud functions deploy inintobot-migrate-settings \
       --entry-point=org.mksn.inintobot.gcp.function.Function \
       --memory=512MB --runtime=java11 --trigger-http --source=build/libs \
       --region=europe-central2

To set webhook:

curl -X "POST" "https://api.telegram.org/bot<token>/setWebhook" \
  -d '{"drop_pending_updates": true, "url": "<app-link>", "allowed_updates": ["edited_message", "inline_query", "message", "chosen_inline_result", "callback_query"]}' \ 
  -H 'Content-Type: application/json; charset=utf-8'