Predeploys

function getL1FeeUpperBound(uint256 unsignedTxSize) external view returns (uint256) {
    // Add 68 to account for unsigned tx
    uint256 txSize = unsignedTxSize + 68;
    // txSize / 255 + 16 is the practical fastlz upper-bound covers 99.99% txs.
    uint256 flzUpperBound = txSize + txSize / 255 + 16;

    int256 estimatedSize = costIntercept + costFastlzCoef * flzUpperBound;
    if (estimatedSize < minTransactionSize) {
        estimatedSize = minTransactionSize;
    }
  
    uint256 l1FeeScaled = baseFeeScalar() * l1BaseFee() * 16 + blobBaseFeeScalar() * blobBaseFee();
    return uint256(estimatedSize) * l1FeeScaled / (10 ** (DECIMALS * 2));
}

function getL1GasUsed(bytes memory _data) public view returns (uint256) {
    if (isFjord) {
      // Add 68 to the size to account for the unsigned tx
      int256 flzSize = LibZip.flzCompress(_data).length + 68;

      int256 estimatedSize = costIntercept + costFastlzCoef * flzSize;
      if (estimatedSize < minTransactionSize) {
        estimatedSize = minTransactionSize;
      }

      // Assume the compressed data is mostly non-zero, and would pay 16 gas per calldata byte
      return estimatedSize * 16;
    }
    // ...
}