Stellar XDR roundtrip tests

[Miracle656]

Background

SDK builds transactions, signs, and submits — but never verifies that an encoded TX decodes back to the same fields. Roundtrip tests would catch subtle bugs.

What to build

For each transaction builder helper, encode → decode → assert deep equality on the operations array.

Key files

• sdk/tests/xdr-roundtrip.test.ts (new)

Acceptance criteria

• One roundtrip per builder helper
• All pass

Drips Wave · Complexity: Easy · 100 points

[softnationz]

@softnationz has applied to work on this issue as part of the Stellar Wave Program's 5th wave.

I'd like to solve this issue please

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[thegreatfeez]

@thegreatfeez has applied to work on this issue as part of the Stellar Wave Program's 5th wave.

Hello, i would like to work on this

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

[drips-wave]

Congratulations, @thegreatfeez! 🎉 Your application was accepted by the repo's maintainers, and the issue is due on June 2, 2026.

🧑‍💻 @thegreatfeez: 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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