[oluwaseyi1996-netizen]

What it fixes

Fixes failing CI on main where the Contracts – fmt, clippy, test, wasm job failed during:

1. cargo clippy --all-targets -- -D warnings due to unused import TryIntoVal.
2. cargo test where test::create_accepts_the_backends_pinned_milestone_xdr panicked with "milestone XDR does not parse".

Root cause

1. Unused Import: In contracts/escrow/src/test.rs, TryIntoVal was imported from soroban_sdk, but the test helper create_raw was refactored to parse XDR payloads via from_xdr_base64 and invoke native SDK methods, leaving TryIntoVal unused. With -D warnings enforced in CI, this triggered a fatal build error.
2. Malformed Base64 Test Constants: The test vectors BACKEND_MILESTONES_XDR and UNSORTED_MILESTONES_XDR in contracts/escrow/src/test.rs were split across multiple lines with trailing backslashes. An unintended duplicate character resulted in a 401-character string instead of the valid 400-character encoding produced by @stellar/stellar-sdk and backend/src/lib/escrowArgs.ts. As base64 requires character lengths divisible by 4, XDR deserialization failed immediately.

The fix and why

1. Clean Imports: Removed TryIntoVal from contracts/escrow/src/test.rs:20.
2. Accurate XDR Constants: Replaced the malformed multiline strings with the canonical 400-character base64 vectors matching backend/src/__tests__/escrowArgs.test.ts and frontend/src/lib/stellar.test.ts.

How it was tested

• Contracts CI Job:
  • cargo fmt --all -- --check — clean, 0 formatting diffs.
  • cargo clippy --all-targets -- -D warnings — clean, 0 warnings/errors.
  • cargo test — all 64 contract tests passed (including create_accepts_the_backends_pinned_milestone_xdr and create_rejects_milestone_maps_whose_keys_are_not_sorted).
  • stellar contract build — wasm contracts built successfully.
• Frontend CI Job:
  • npm run lint — passed.
  • npx tsc --noEmit — passed.
  • npm test — all 361 tests passed.
  • npm run build — production build succeeded.
• Backend CI Job:
  • npx prisma generate — passed.
  • npx prisma migrate deploy & schema drift check — passed.
  • npx tsc --noEmit — passed.
  • npm test — all 411 tests passed.
• Advisory Job:
  • npm audit & cargo audit completed.
• Verified in live GitHub Actions run #39451250986 with 100% green checks across all jobs.

Follow-up worth filing separately

• None needed; all contracts, backend, and frontend checks are fully passing and verified green in CI.