Add `packages/types/` shared TypeScript types package

[Levi-Ojukwu]

Description
Types like Invoice, ReputationScore, GovernanceProposal, and SupportedToken are defined separately in the SDK and must be duplicated or re-declared in the indexer and notifications service. A shared types package eliminates this duplication and ensures type consistency across the entire ecosystem.

Requirements and context

• Create packages/types/src/ with shared domain types: Invoice, InvoiceState, ReputationScore, GovernanceProposal, ProposalAction, ContractStats, SupportedToken, TokenConfig, ILNEvent union type
• SDK, CLI, indexer, and notifications all import from @invoice-liquidity/types
• Keep the types package dependency-free (no runtime dependencies)
• Write type-level tests using tsd or expect-type

Suggested execution

git checkout -b feat/shared-types-package

• Create packages/types/ package
• Extract types from SDK and indexer into the shared package
• Update all imports across the monorepo

Example commit message
feat: add shared types package for consistent domain types across monorepo

---

[Bellamzy]

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

I'd really like the chance to work on this issue — I've been actively looking to contribute and gain real experience, and I have hands-on skills in debugging and GitHub workflows to back it up.
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[emteebug12-jpg]

@emteebug12-jpg has applied to work on this issue as part of the Stellar Wave Program's 6th wave.

Hi maintainers! I’d love to help out with this issue. I’ve checked the current codebase/documentation and know exactly what needs to be updated to make this clearer. I will ensure everything aligns perfectly with your existing contribution guidelines.

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[taiwoMoil]

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

Hello, I’d like to take this issue and contribute a fix. I’m familiar with the technologies involved and will investigate the problem before creating a pull request. Looking forward to contributing to the project.

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[Ultra-Tech-code]

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

hello, I'd like to work on this issue.

I'll create the shared packages/types TypeScript package containing the core domain types used across the ILN ecosystem. I'll extract and centralize types like Invoice, InvoiceState, ReputationScore, GovernanceProposal, SupportedToken, and the ILNEvent union type, update the SDK, CLI, indexer, and notifications service to import from @invoice-liquidity/types, and keep the package dependency-free. I'll also add type-level tests using tsd or expect-type to ensure the shared definitions remain consistent.

ℹ️ Repo Maintainers: To accept this application, review their application or assign @Ultra-Tech-code to this issue.

[Caneryy]

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

Hello, I'd like to work on this issue.

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

[drips-wave]

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

🧑‍💻 @Ultra-Tech-code: 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

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[grantfox-oss]

🦊 GrantFox — @Ultra-Tech-code has been assigned to this issue!

Next steps:

1. Open a Pull Request referencing this issue (e.g., Closes #368)
2. Your PR will be reviewed by the Invoice-Liquidity-Network maintainers

Good luck! Track your progress on GrantFox.