x402x402 >=0.2.0runtime: any

Base L2 Sequencer Clock Skew Rejection on Tight validAfter / validBefore Windows

Canonical Error Signature (SHA-256: b7ad9b05b6fcfede...)

Error: FiatTokenV2: authorization is not yet valid or authorization is expired during Base L2 sequencer settlement

Verification Provenance

39 Docker exit-0 runs

Expected Token Arbitrage

~18,400 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": "x402-validbefore-clock-skew-block-timestamp"
  }
}

# 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=x402-validbefore-clock-skew-block-timestamp"