Implement XdrCodec for TransactionResult

[Emrys02]

After submitting transactions, the network returns a TransactionResult in XDR format. Decoding this correctly is vital for determining the success or failure of the transactions.

Implementation Guidelines

Key Files: crates/core/src/xdr/codec.rs.

• Implement the XdrCodec trait for the TransactionResult type.
• Hook into the existing decode_xdr_base64 and encode_xdr_base64 functions where necessary.

Expectations

What done looks like: System can parse raw XDR transaction results into structured TransactionResult objects.

For any question, reach me on Discord: emry_ss

[Osuochasam]

@Osuochasam has applied to work on this issue as part of the Stellar Wave Program's 3rd wave.

Dear maintainer, pls assign me this issue

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[drips-wave]

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

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