fix(sdk): upgrade @stellar/stellar-sdk to v16 and resolve breaking changes (closes #5)

[guptakumarranjeet150]

Summary of Changes

Upgrades @stellar/stellar-sdk from legacy ^14.4.2 to ^16.3.0 across the root package and both frontends (sgs_frontend and template_frontend), resolving v16 breaking changes and type definitions.

Details

1. SDK Upgrade:

   • Upgraded @stellar/stellar-sdk to ^16.3.0 in package.json, sgs_frontend/package.json, and template_frontend/package.json.
   • Updated lockfiles (bun.lock) with clean dependency resolution.
   • Dropped axios in favor of native fetch under the hood, yielding a ~64% frontend bundle size reduction (~2 MB -> ~729 kB).

2. Signer Interface & Type Alignment:

   • Aligned ContractSigner in src/types/signer.ts to directly use official SignTransaction and SignAuthEntry signatures from @stellar/stellar-sdk/contract.
   • Updated service signatures across diceDuelService.ts, numberGuessService.ts, and twentyOneService.ts to accept ContractSigner.
   • Updated injectSignedAuthEntry in authEntryUtils.ts to use ContractSigner for player2Signer.

3. authorizeEntry Passphrase Safety:

   • Verified that all invocations of authorizeEntry (authEntryUtils, diceDuelService, numberGuessService, twentyOneService) strictly provide explicit networkPassphrase (tx.options.networkPassphrase or NETWORK_PASSPHRASE), complying with the v16 breaking change where the default was removed.

4. Documentation & Prerequisites:

   • Added Node.js >= 22.0.0 requirement to README.md under Prerequisites.
   • Rebuilt production documentation bundle in docs/ using the updated v16 runtime.

Verification

• bun --cwd=sgs_frontend run build succeeds (TypeScript compilation + Vite build with 0 errors)
• bun --cwd=template_frontend run build succeeds (TypeScript compilation + Vite build with 0 errors)
• bun --cwd=sgs_frontend run build:docs succeeds and outputs clean assets to docs/

Closes #5

[gitar-bot]

Gitar is working

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[sonarqubecloud]

Quality Gate passed

Issues
0 New issues
0 Accepted issues

Measures
0 Security Hotspots
0.0% Coverage on New Code
0.0% Duplication on New Code

See analysis details on SonarQube Cloud