💸 SvelteKit + x402: Premium Content with Wallet Payments

Pay-per-access protected routes on Solana, using wallet-standard and the x402 protocol. No middleware – full control.

🚀 What it does

• Protects an API endpoint (/api/premium) with HTTP 402 Payment Required
• Users connect their Solana wallet (via wallet-standard)
• Client automatically pays exactly $1 (or equivalent SOL)
• Server verifies payment, settles, and unlocks premium content

🧱 How it works (simplified)

1. Server (api/premium/+server.ts)

• Sets payment requirement: price: "$1", treasury address, network
• Returns 402 + PAYMENT-REQUIRED header if no payment
• Verifies incoming payment signature, settles on-chain
• Responds with premium data + PAYMENT-RESPONSE header

2. Client store (x402.ts)

• Svelte store that wraps fetch
• Uses connected wallet to sign payment
• Handles the x402 flow automatically (retry with payment)

3. Wallet integration

• $lib/wallet/standard – standard wallet adapter
• @solana/wallet-account-signer – turns wallet account into a signer for SVM

📦 Dependencies

# Install everything
bun i @wallet-standard/base @wallet-standard/app @wallet-standard/features @wallet-standard/ui-registry @wallet-standard/ui @solana/wallet-account-signer
bun i @x402/core @x402/fetch @x402/svm

🔮 Future plans

• Transaction cancel / refund
• Database to track purchased content
• Browser extension integration
• Pay → DB update → return success

📚 Learn more

Solana x402 guide →

Made with ☕ and a bit of frustration (but it works).
#svelte #solana #wallet-standard #x402