strichel

A lightweight digital tally tab tracker. Users have a balance that gets topped up and spent down — think prepaid bar tabs or shared kitty accounts.

Features

• Multiple accounts with running balances
• Index groups accounts into active (entry in last 7 days) and inactive
• Quick spend/top-up buttons and named preset buttons (configurable)
• Custom amount and optional note per transaction
• Collect — charge individual amounts from multiple people at once
• Split — divide a total equally among selected people
• Transaction history with undo (within 1 hour of booking)
• Hourly consolidation of old entries (configurable)
• Prometheus metrics at /metrics

Running

go run .

Listens on :8080 by default. The SQLite database (strichel.db) is created automatically in the working directory on first run.

Seeding test data

go run ./cmd/seed            # writes to strichel.db
go run ./cmd/seed test.db    # or a separate file

Inserts 40 users with random entries spread over the last 6 months (25 inactive, 15 active).

Configuration

All configuration is via environment variables, parsed at startup by caarlos0/env.

Variable	Default	Description
STRICHEL_ADDR	:8080	TCP address to listen on
STRICHEL_DB	strichel.db	Path to the SQLite database file
STRICHEL_CONSOLIDATE	true	Set to false to disable the hourly consolidation job
STRICHEL_BUTTONS	-0.25,-0.35,-0.50,-1,-2,-5,0.50,1,2,5,10,20	Exactly 12 comma-separated amounts; negative = spend buttons, positive = top-up buttons
STRICHEL_PRESETS	Getränk 🧉:100,Wasser 🌊:50,Bueno 🍬:35,Pringles 🥔:225,Pickup 🍫:100,Tschunk 🍹:350	3 or 6 named preset spend buttons in name:cents format

Building a binary

go build -o strichel .
./strichel

Docker

FROM golang:1.22-alpine AS build
WORKDIR /app
COPY . .
RUN go build -o strichel .

FROM alpine:latest
WORKDIR /app
COPY --from=build /app/strichel .
EXPOSE 8080
CMD ["./strichel"]

Metrics

Prometheus metrics are exposed at GET /metrics.

Metric	Type	Description
strichel_spend_euros	Histogram	Spend event sizes in euros; buckets are derived from the configured spend buttons

strichel_spend_euros_count gives the total number of spending events.

Tech stack

• Go — net/http, html/template, database/sql
• SQLite — via modernc.org/sqlite (pure Go, no CGO)
• Tailwind CSS — loaded from CDN
• Prometheus — prometheus/client_golang
• caarlos0/env — environment variable parsing