Common Mistakes

Error is human

• You bid too low, minimum: https://polygonscan.com/address/0xf5df545113dee4df10f8149090aa737ddc05070a#readContract#F16

• Your gas prices didn't match between opp and searcherTx

• Your transaction nonces are messed up and searcherTx is stuck by another of your tx at same nonce

• Your searcher proxy fastLaneCall declaration is wrong it must be

  function fastLaneCall(
      address _sender,
      uint256 _bidAmount,
      bytes calldata _searcherCallData
  ) external payable returns (bool, bytes memory)