[BE-42] QuickBooks Online accounting integration

[yusuftomilola]

Overview

An alternative to Xero (BE-41) for hubs whose accountants use QuickBooks Online — North America and South Africa are common markets where QBO dominates. Provides the same auto-sync for invoices and payments.

Context

• Same architecture pattern as BE-41 (Xero) — OAuth 2.0, token storage, cron sync
• Package: node-quickbooks or quickbooks-js npm package
• InvoicesModule and PaymentsModule as data sources

Tasks

• Create QuickBooksConnection entity: id, accessToken (encrypted), refreshToken (encrypted), realmId (QuickBooks company ID), connectedAt, expiresAt
• GET /integrations/quickbooks/connect — initiate QuickBooks OAuth 2.0 flow (admin only)
• GET /integrations/quickbooks/callback — exchange code for tokens; store in QuickBooksConnection
• DELETE /integrations/quickbooks — disconnect (admin only)
• GET /integrations/quickbooks/status — returns connection status
• On invoice PAID event: create matching QuickBooks Invoice
• On payment SUCCESS event: create QuickBooks Payment record
• Nightly cron reconciliation job (same pattern as Xero)
• Store QUICKBOOKS_CLIENT_ID, QUICKBOOKS_CLIENT_SECRET, QUICKBOOKS_ENVIRONMENT (sandbox/production) in ConfigService

Files to Modify / Create

• New: backend/src/integrations/quickbooks/ (module, entity, controller, service)
• backend/src/app.module.ts

[sudo-robi]

@sudo-robi has applied to work on this issue as part of the Stellar Wave Program's 6th wave.

Hi maintainer I'm a full stack developer and smart contract developer let me help you resolve this issue and I assure you it will be thoroughly done neatly as I have seen my way around the issue.

ℹ️ Repo Maintainers: To accept this application, review their application or assign @sudo-robi to this issue.

[madisonsc52-del]

@madisonsc52-del has applied to work on this issue as part of the Stellar Wave Program's 6th wave.

Hi maintainer i can work on this, I'll make sure to work on the issue asap

ℹ️ Repo Maintainers: To accept this application, review their application or assign @madisonsc52-del to this issue.

[Toyinoje]

@Toyinoje has applied to work on this issue as part of the Stellar Wave Program's 6th wave.

Hello maintainer, I will like to work on this project. Please assign

ℹ️ Repo Maintainers: To accept this application, review their application or assign @Toyinoje to this issue.

[Uyoxy]

@Uyoxy has applied to work on this issue as part of the Stellar Wave Program's 6th wave.

can i work on this

ℹ️ Repo Maintainers: To accept this application, review their application or assign @Uyoxy to this issue.

[anupam7984]

@anupam7984 has applied to work on this issue as part of the Stellar Wave Program's 6th wave.

I would like to take this issue and can solve in 24hrs. I am full stack web2+web3 deveoper.

ℹ️ Repo Maintainers: To accept this application, review their application or assign @anupam7984 to this issue.

[sudo-robi]

Hi @yusuftomilola you haven't assigned me

[grantfox-oss]

🦊 GrantFox — @Uyoxy has been assigned to this issue as part of the Official Campaign campaign!

Next steps:

1. Open a Pull Request referencing this issue (e.g., Closes #1229)
2. Your PR will be reviewed by the DistinctCodes maintainers

Good luck! Track your progress on GrantFox.

[drips-wave]

Congratulations, @Uyoxy! 🎉 Your application was accepted by the repo's maintainers, and the issue is due on June 30, 2026.

🧑‍💻 @Uyoxy: Please resolve the issue such that the repo's maintainers have enough time to review your contribution before the due date. You'll earn Points for completing the issue on-time, which will make you eligible for a share of the Stellar Wave Program's reward pool.

Warning

When opening a PR, please link it to this issue to ensure it gets tracked accurately. Points are awarded when this issue is marked as completed by the maintainer.

🤠 Repo maintainers: Please keep an eye on the contributor's progress and review their work before the due date. You can manage this issue, including adjusting its complexity and points, here.

🌊 Happy Wave 🌊