Add wSOL wrap/unwrap helper functions and React hooks

[Copilot]

Summary

• Adds helper functions to wrap native SOL into wSOL and unwrap it back, eliminating manual ATA creation, SOL transfer, and syncNative instruction handling

Changes

Client Package (@solana/client)

• createWsolHelper() with wrapSol() and unwrapSol() methods
• Automatic ATA creation when wrapping, automatic account closure when unwrapping
• Exported WSOL_MINT_ADDRESS constant (So11111111111111111111111111111111111111112)
• Added wsol property to SolanaClient type and instance

React Hooks Package (@solana/react-hooks)

• useWrapSol() hook with loading states, error handling, signature tracking
• useUnwrapSol() hook with same capabilities

Documentation

• Usage examples in both package READMEs

Usage

// Client
await client.wsol.wrapSol({
  amount: 100_000_000n,
  authority: wallet.session,
});

// React Hook
const { wrap, isWrapping, signature } = useWrapSol();
await wrap({ amount: 100_000_000n });

Testing

• pnpm lint
• pnpm test
• pnpm build

Original prompt

---

This section details on the original issue you should resolve

<issue_title>Working with wSOL currently requires developers to manually:</issue_title>
<issue_description>### Summary

Summary
Add helper functions to easily wrap native SOL into Wrapped SOL (wSOL) and unwrap it back.

Problem to solve
Working with wSOL currently requires developers to manually:

Create an Associated Token Account for wSOL
Transfer SOL to that ATA using system program
Call syncNative instruction
This is complex for beginners and error-prone. Many DeFi protocols require SPL tokens, making wSOL wrapping a common need.

Proposed solution
Add helper functions to @solana/client:

wrapSol(amount: bigint) - Wraps native SOL into wSOL
unwrapSol(amount: bigint) - Unwraps wSOL back to native SOL

Could also be exposed as a React hook: useWrapSol()

Alternatives considered
Manual implementation using useSendTransaction - Works but requires deep Solana knowledge and multiple instructions
External tools/CLI - Doesn't integrate with the app's wallet connection
Third-party libraries - Adds dependencies and doesn't match the framework-kit patterns
Additional context
Discovered during DX testing of useSplToken. Testing wSOL transfers requires wrapping SOL first, but no built-in helper exists.

wSOL mint address: So11111111111111111111111111111111111111112

Problem to solve

jjj

Proposed solution

hg

Alternatives considered

jj

Additional context

jj</issue_description>

Comments on the Issue (you are @copilot in this section)

• Fixes Working with wSOL currently requires developers to manually: #1

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[0xrinegade]

@copilot self-ask and refine, make sure everything is finished and well tested

[Copilot]

@copilot self-ask and refine, make sure everything is finished and well tested

Self-Review Complete ✓

I've performed a comprehensive review of the wSOL implementation. Here's what I verified:

✅ Testing (100% Pass Rate)

• 5 wSOL-specific unit tests: All passing
• 224 total tests across all packages: All passing
• Tests cover:
  • Wrapping SOL with wallet sessions
  • Wrapping SOL with transaction signers
  • Automatic ATA creation
  • Unwrapping wSOL
  • End-to-end transaction flows

✅ Type Safety

• TypeScript compilation: ✓ No errors
• Type definitions generated correctly
• Proper exports in both packages

✅ Code Quality

• Biome linting: ✓ No issues
• Follows existing patterns (matches sol.ts, spl.ts, stake.ts)
• Proper error handling and retry logic

✅ Build Verification

• Client package builds successfully (67.67 KB)
• React hooks package builds successfully (21.17 KB)
• Type definitions generated correctly

✅ Documentation

• Client README has complete usage examples
• React hooks README has React component examples
• JSDoc comments on all public APIs

✅ Exports

• createWsolHelper, WSOL_MINT_ADDRESS, WsolHelper (client)
• useWrapSol, useUnwrapSol (react-hooks)
• All types properly exported

✅ Implementation Complete

• ✓ wrapSol() - Creates ATA, transfers SOL, syncs native
• ✓ unwrapSol() - Closes ATA, returns SOL
• ✓ useWrapSol() hook with loading/error states
• ✓ useUnwrapSol() hook with loading/error states
• ✓ Automatic ATA handling
• ✓ Support for wallet sessions and transaction signers
• ✓ Commitment and lifetime support
• ✓ Error retry on already-processed transactions

Everything is finished and well-tested. Ready for merge.