[Testing] No integration test exercises the full create -> top-up -> partial withdraw -> cancel lifecycle end-to-end through the backend API against the contract

[grantfox-oss]

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Why this matters

backend/tests/integration/ exists but individual controller/service tests are largely unit-level, mocking the chain layer. There doesn't appear to be a single integration test that walks a stream through its full realistic lifecycle (create, top up, partial withdraw, cancel) verifying the indexer correctly updates withdrawnAmount/depositedAmount/status at each step in sequence. Bugs that only manifest from state accumulated across multiple operations (several of which are already individually tracked) would be caught earlier by one lifecycle test.

Acceptance criteria

• Add an integration test in backend/tests/integration/ that performs the full lifecycle against a sandboxed/test chain environment
• Assert stream and event state after each step
• Document how to run it locally (sandbox mode requirements)

Files to touch

• backend/tests/integration/

Out of scope

• Running against real testnet/mainnet
• Load/performance testing

[sherifatolanike]

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

Hi maintainer, can I work on this issue please?

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[AbuJulaybeeb]

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

Hi Maintainer, haven reviewed the description of the issue, and well experienced with Js Library,
I would like to hop on the issue and sure to deliver at ETA 2hrs

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[Darkvader-ship-it]

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

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[grantfox-oss]

🎉 This issue has been marked as completed on GrantFox as part of the Official Campaign | FWC26 campaign!

@Darkvader-ship-it's PR #1128 was approved and merged by @ogazboiz.

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👏 Great work, @Darkvader-ship-it! Keep contributing to LabsCrypt.

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This issue has been completed by @Darkvader-ship-it as part of the Stellar Wave Program's 7th Wave 🥳

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