Skip to content

BUG_FIX_SUMMARY.md

Latest commit

 

History

History
92 lines (70 loc) · 2.78 KB

BUG_FIX_SUMMARY.md

File metadata and controls

92 lines (70 loc) · 2.78 KB
Raw

Bug Fix Summary: X402 Solana Payment Verification

Problem Identified

The application was failing at the payment verification step with error:

Payment verification failed: Invalid payment
Status: 402 (Payment Required)
Error Code: PAYMENT_VERIFICATION_FAILED

Root Cause

Network Name Mismatch: The x402 protocol specification requires specific network names for Solana:

  • Mainnet: "solana" (NOT "solana-mainnet")
  • Devnet: "solana-devnet"

The application was using "solana-mainnet" internally but the PayAI facilitator expects "solana" according to the official x402 spec.

Changes Made

1. Fixed Network Name Mapping in src/middleware/x402Payment.js

Before:

const requirementNetwork =
  isSolana && chainConfig.network === "solana-mainnet"
    ? "solana"
    : chainConfig.network;

After:

// Map network names to x402 spec format
// x402 spec uses "solana" for mainnet, not "solana-mainnet"
let requirementNetwork = chainConfig.network;
if (isSolana) {
  if (chainConfig.network === "solana-mainnet") {
    requirementNetwork = "solana";
  } else if (chainConfig.network === "solana-devnet") {
    requirementNetwork = "solana-devnet";
  }
}

This ensures that:

  • Internal config uses "solana-mainnet" for clarity
  • Payment requirements sent to facilitator use "solana" per x402 spec
  • Payment verification matches the correct network name

Why This Fixes the Issue

  1. Frontend sends payment with network: "solana" (from payment requirement)
  2. Backend now sends payment requirement with network: "solana" (mapped from internal "solana-mainnet")
  3. Facilitator receives matching network names and can verify the payment correctly

Verification

The PayAI facilitator expects this exact structure for Solana payments:

{
  "x402Version": 1,
  "scheme": "exact",
  "network": "solana",  // Must be "solana" not "solana-mainnet"
  "payload": {
    "transaction": "base64-encoded partially-signed transaction"
  }
}

Our implementation now conforms to this specification.

Additional Notes

  • The solanaPayment.js service exists but is NOT used (confirmed via grep)
  • The middleware correctly uses the PayAI facilitator for Solana verification
  • No changes needed to frontend code - it correctly follows the payment requirements
  • The facilitator handles all Solana transaction verification per x402 spec

Testing Required

  1. Test Solana mainnet payment flow
  2. Verify payment verification succeeds
  3. Confirm transcription begins after successful payment
  4. Test with different Solana wallets (Phantom, etc.)

References