### Flashbots Relay Signature Error

[KUMAOKI]

I am encountering a signature verification error while trying to send a bundle to the Flashbots relay on the Sepolia testnet. Below are the details of my setup and the error message:

• Ethereum Node: Infura Sepolia Testnet
• Priority Gas Price: 31000000000 wei
• Latest Block Number: 6221012
• Base Fee Per Gas: 2306378913

Transactions

1. From Rescue Wallet to Hacked Wallet:

{
  "to": "0x[HACKED_WALLET_ADDRESS]",
  "value": 10000000000000000,
  "gas": 21000,
  "maxFeePerGas": 33306378913,
  "maxPriorityFeePerGas": 31000000000,
  "nonce": 0,
  "chainId": 11155111
}

2. From Hacked Wallet to Rescue Wallet:
{
"to": "0x[RESCUE_WALLET_ADDRESS]",
"value": 10000000000000000,
"gas": 21000,
"maxFeePerGas": 33306378913,
"maxPriorityFeePerGas": 31000000000,
"nonce": 0,
"chainId": 11155111
}

Signed Transactions

  Signed Transaction 1: 0x02f87683...15f817c89e
  Signed Transaction 2: 0x02f87683...8eb0624297

Error Message
{
"error": "error in signature check"
}

Payload and Headers

  Payload:

{
"jsonrpc": "2.0",
"method": "eth_sendBundle",
"params": [
  [
    {
      "signed_transaction": "0x[signed_transaction_1]"
    },
    {
      "signed_transaction": "0x[signed_transaction_2]"
    }
  ]
],
"id": 1
}
Headers:

{
"Content-Type": "application/json",
"X-Flashbots-Signature": "0x[RELAY_SIGNING_ADDRESS]:0x[signature]"
}



Could you please assist in identifying the cause of this error and how to resolve it? Any guidance would be greatly appreciated.

Thank you.