clarify

ethereum · Nov 25, 2024 · 64fdb7b · 64fdb7b
1 parent b1867e7
commit 64fdb7b
Showing 1 changed file with 3 additions and 1 deletion.
diff --git a/EIPS/eip-7742.md b/EIPS/eip-7742.md
@@ -95,7 +95,9 @@ Furthermore `get_base_fee_per_blob_gas` as specified by [EIP-4844](./eip-4844.md
 def calc_excess_blob_gas(parent: Header) -> int:
   # normalize parent's excess blob gas if this block was fork block
   if(parent.timestamp < FORK_TIMESTAMP)
-    normalized_parent_excess_blob_gas = parent.excess_blob_gas * EXCESS_BLOB_GAS_NORMALIZATION_TARGET_BLOBS // OLD_TARGET_BLOBS_PER_BLOCK
+    # note multiplication of parent excess blob gas with EXCESS_BLOB_GAS_NORMALIZATION_TARGET_BLOBS is before
+    # integer division by OLD_TARGET_BLOBS_PER_BLOCK to preserve sensitivity
+    normalized_parent_excess_blob_gas = (parent.excess_blob_gas * EXCESS_BLOB_GAS_NORMALIZATION_TARGET_BLOBS) // OLD_TARGET_BLOBS_PER_BLOCK
     target_blobs_per_block = OLD_TARGET_BLOBS_PER_BLOCK
   else
     normalized_parent_excess_blob_gas = parent.excess_blob_gas