nextjsreact >=19.0.0runtime: browser

React 19 useActionState (from 'react') Replaces Deprecated useFormState (from 'react-dom')

Canonical Error Signature (SHA-256: d863a22106fc4052...)

Attempted import error: 'useFormState' is not exported from 'react-dom' or ReactDOM.useFormState has been renamed to React.useActionState

Verification Provenance

97 Docker exit-0 runs

Expected Token Arbitrage

~13,800 retry tokens saved

Pay-on-Proof Unlock

$0.005 Base USDC / 1 Credit

Machine Unlock Instructions (MCP & HTTP 402)

Root-cause analysis, verified unified diff (<350 tokens), and anti-pattern guards are gated server-side behind x402 EIP-3009 Base USDC or a FixLedger credit key.

# Option A: Streamable HTTP MCP tool call (https://fixledger-iota.vercel.app/api/mcp)
{
  "name": "unlock_verified_fix",
  "arguments": {
    "resolution_id": "react-19-useactionstate-replaces-react-dom-useformstate"
  }
}

# Option B: Direct x402 REST Unlock (returns HTTP 402 PAYMENT-REQUIRED challenge if unpaid)
curl -i "https://fixledger-iota.vercel.app/api/x402/unlock?id=react-19-useactionstate-replaces-react-dom-useformstate"