Build multi-touch attribution reports with Supabase multi-model MTA

Description

Quick Overview
This workflow ingests marketing touch events, stores them in Supabase, stitches identities by shared email, and calculates first-touch, last-touch, linear, and time-decay multi-touch attribution credit per channel, outputting a side-by-side model comparison.

How it works
Runs when triggered manually (or can be adapted to receive real touch events via a webhook).
Loads configuration such as the channel list and the time-decay half-life window.
Generates a batch of synthetic multi-touch customer journeys for the demo run.
Writes all touch events to a Supabase table via the Supabase REST API.
Reloads the stored touches from Supabase and merges visitors into a single identity when they share an email address.
Computes revenue-weighted channel credit across converting journeys using first-touch, last-touch, linear, and time-decay attribution models.
Prints a formatted comparison table of channel credit across the four models.

Setup
Create a Supabase project and table (for example, mta_touches) to store touch events, matching the fields used in the workflow (visitor_id, email, channel, ts, is_conversion, revenue).
Add SUPABASE_URL and SUPABASE_KEY environment variables to your n8n instance so the workflow can call the Supabase REST API.
Update the Supabase table name and any row-filtering logic in the Supabase requests if your schema or naming differs.
If you want production ingestion, replace the synthetic journey generator with a Webhook trigger that posts real touch events into the same storage step.
Adjust HALF_LIFE_DAYS and CHANNELS in the configuration to match your attribution model settings and marketing taxonomy.