AbrechnomatBot

Telegram bot for bill splitting. Supports an unlimited amount of debtors/creditors on a bill. Calculates as little transactions as possible to pay everybody out.

Usage

Add it to a group (works best if you give it admin privileges)
Send /add_payment see on it should be used
/revert_payment to remove an added payment
Use /bill_stats to see the current amount and needed transactions
/close_bill after all payments are done (new bill starts immediately after that)

Development Setup

Create bot in BotFather to get the bot api token
cp .env.example .env.local
Fill in fields in .env.local
Set up env variables for current session: source .env.local
Run: iex -S mix

Deployment

ssh into server
git clone https://github.com/peterhass/abrechnomat_bot.git
MIX_ENV=prod mix deps.get && MIX_ENV=prod mix release
Setup database if needed: DB_CREATE=true ./bin/abrechnomat_bot start_iex

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