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The payments webhook is dropping events under load. Can you figure out what's going on?

Found it. The webhook handler in src/payments/webhook.ts is processing events synchronously, which blocks the event loop under high throughput. Three issues:

No queue — events are processed inline instead of being queued
Missing idempotency — duplicate events cause double-charges
No retry logic — failed Stripe calls silently drop

I've refactored it to use a job queue with idempotency keys and exponential backoff:

src/payments/webhook.ts edited

export async function handleWebhook(event: StripeEvent) {

if (await isDuplicate(event.id)) return

await queue.add('process-payment', {

eventId: event.id,

retries: 3,

})

}

Also updated 4 other files. Tests passing — want me to commit?

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relai_batch_edit 3 files changed

src/payments/webhook.ts

- processEvent(event)

+ await queue.add('process', { eventId: event.id })

+ await markProcessed(event.id)

src/lib/queue.ts

+ export const queue = new BullQueue('payments', {

+ attempts: 3, backoff: { type: 'exponential' }

+ })

+24 -8

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main · 2m 14s · triggered by push

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main · running · 47s elapsed

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feature/auth · 38s · 1 failure

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search: "webhook retry logic"

Mar 12

Webhook refactor discussion

...added exponential backoff with 3 retries and idempotency keys to prevent duplicate processing...

Feb 28

Initial webhook implementation

...decided to use BullMQ for the job queue since it handles retry logic natively with Redis...

Feb 15

Architecture planning

...webhook events should be processed async — synchronous processing will block under load...

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◆ Proposed Plan

1. Add rate limiter middleware to api/routes.ts

2. Create Redis-backed token bucket in lib/ratelimit.ts

3. Update tests in __tests__/api.test.ts

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To Do

Add user avatars

Write API docs

In Progress

Fix webhook handler

Done

Setup CI pipeline

Auth module

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npm run dev

PID 48291 · running · 4m 22s

npx tailwindcss --watch

PID 48305 · running · 4m 18s

npm test

PID 48412 · exited (0) · 12s

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The desktop app for
Claude Code.

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Claude Code deserves
a proper home.

Not a terminal.
A visual experience.

Better tools,
built in.

Every conversation,
forever.

Switch lives
in one click.

Everything else
you'd expect.

Your code, your machine

Multi-project workspace

Built-in terminal

Mini IDE

Personality presets

Git worktrees

Todo list

Native & lightweight

See it in action.

Plan Mode

Task board

Process management

Start coding with
relai:code today.

The desktop app for Claude Code.

Stupidly affordable.

Monthly

Annual

Claude Code deservesa proper home.

Not a terminal.A visual experience.

Better tools,built in.

Every conversation,forever.

Switch livesin one click.

Everything elseyou'd expect.

Your code, your machine

Multi-project workspace

Built-in terminal

Mini IDE

Personality presets

Git worktrees

Todo list

Native & lightweight

See it in action.

Plan Mode

Task board

Process management

Start coding withrelai:code today.

The desktop app for
Claude Code.

Claude Code deserves
a proper home.

Not a terminal.
A visual experience.

Better tools,
built in.

Every conversation,
forever.

Switch lives
in one click.

Everything else
you'd expect.

Start coding with
relai:code today.