Engineer Type-Safe XDR Deserialization Layer for Soroban Contract Return Values

[temma02]

Description

Build a type-safe XDR deserialization layer that converts raw Soroban contract return values into strongly-typed application objects, eliminating unsafe manual XDR parsing.

Requirements and Context

• Type safety: XDR values must deserialize to typed objects
• Testing: Test deserialization for all return value types
• Documentation: Document the deserialization layer

Suggested Execution

Branch: feat/issue-090-soroban-xdr-typesafe-deserialization

Implement Changes

• Add a type-safe XDR deserialization layer to packages/stellar/src/soroban.ts
• Map Soroban SCVal types to TypeScript types
• Handle all scalar, vector, and map return value types
• Throw typed errors on deserialization failures

Test and Commit

• Test deserialization of scalar, vector, and map return values
• Test typed error on malformed XDR
• Document the deserialization layer

Example Commit Message

feat(soroban): add type-safe XDR deserialization layer

- Map Soroban SCVal types to TypeScript types
- Handle scalar, vector, and map return values
- Throw typed errors on deserialization failures

Guidelines

• Cover all SCVal variants used by templates
• Never silently coerce malformed XDR
• Build on the existing typed error infrastructure

[Markodiba6399]

@Markodiba6399 has applied to work on this issue as part of the Stellar Wave Program's 5th wave.

I would like work on this issue

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