Implement invoice customization with per-tenant branding and templates

[Smartdevs17]

Context

Merchants need invoice customization with their branding.

Current Limitation

Invoices are generic with no customization.

Expected Outcome

• Per-tenant invoice branding
• Customizable invoice templates
• PDF generation with branding
• Invoice delivery automation

Acceptance Criteria

• Per-tenant branding (logo, colors, fonts)
• Customizable invoice templates
• PDF generation with branding
• Automated invoice delivery
• Invoice preview functionality
• Invoice template marketplace
• Invoice analytics

Technical Scope

• backend/services/billing/ - Billing domain
• contracts/subscription/src/ - Subscription contract
• src/store/invoiceStore.ts - Invoice store
• app/screens/ - Invoice UI screens

[chi797]

@chi797 has applied to work on this issue as part of the Stellar Wave Program's 7th wave.

I’m a smart contract and full-stack developer who turns complex ideas into secure, production-ready blockchain code.
With strong skills in Rust and Solidity, I build systems that are fast, safe, and built to last.
My experience with the Stellar SDK lets me ship real-world Web3 solutions that actually move value

ℹ️ Repo Maintainers: To accept this application, review their application or assign @chi797 to this issue.

[Michealshodipo56]

@Michealshodipo56 has applied to work on this issue as part of the Stellar Wave Program's 7th wave.

I would like to work on this kindly assign me

ℹ️ Repo Maintainers: To accept this application, review their application or assign @Michealshodipo56 to this issue.

[agenes01]

@agenes01 has applied to work on this issue as part of the Stellar Wave Program's 7th wave.

can i work on this

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[drips-wave]

Congratulations, @agenes01! 🎉 Your application was accepted by the repo's maintainers, and the issue is due on July 30, 2026.

🧑‍💻 @agenes01: 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.

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