---
issue: "012"
title: "updateOffer sends PUT but backend registers PATCH — offer edits fail"
severity: major
domain: seller-offer
labels: [frontend, bug]
status: open
created: 2026-05-29
source: Doc vs Code Audit 2026-05-29
---

# 🟠 updateOffer sends PUT but backend registers PATCH — offer edits fail

**Severity:** major
**Domain:** seller-offer
**Labels:** frontend, bug

## Description

`frontend/src/actions/marketplace.ts` (line ~289) calls `axiosInstance.put(endpoints.marketplace.offers.update)` mapping to `PUT /marketplace/offers/:id`. The backend registers `PATCH /offers/:id` (routes.ts line ~1260). Method mismatch → 404 or matched wrong route. `step-1-send-proposal.tsx` calls `updateOffer()` for proposal edits, so this path is actively exercised.

## Current Behavior

A seller editing an existing proposal sends `PUT /marketplace/offers/:id` which does not match the registered `PATCH` handler.

## Expected Behavior

`updateOffer` should use `axiosInstance.patch(...)`.

## Affected Files

- `frontend/src/actions/marketplace.ts` — `updateOffer` function

## References

- [Doc vs Code Audit Report](../09%20-%20Audits/Doc%20vs%20Code%20Audit%20Report%20-%202026-05-29.md) — Finding M28