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Co-authored-by: Ansgar Dietrichs <adietrichs@gmail.com>
Co-authored-by: lightclient <lightclient@protonmail.com>

EIPS/eip-4844.md

@@ -234,9 +234,9 @@ def get_origin(tx: SignedBlobTransaction) -> Address:
 
 ### Header extension
 
-The current header encoding is extended with a new 256-bit unsigned integer field `blobs`. This is the running
+The current header encoding is extended with a new 256-bit unsigned integer field `excess_blobs`. This is the running
 total of excess blobs included on chain since this EIP was activated. If the total number of blobs is below the
-average, `blobs` is capped at zero.
+average, `excess_blobs` is capped at zero.
 
 The resulting RLP encoding of the header is therefore:
 
@@ -258,16 +258,18 @@ rlp([
     mix_digest,
     nonce,
     base_fee,
-    blobs
+    excess_blobs
 ])
 ```
 
-The value of `blobs` can be calculated using the parent header and number of blobs in the block.
+The value of `excess_blobs` can be calculated using the parent header and number of blobs in the block.
 
 ```python
-def calc_excess_blobs(parent: Header, blobs: int) -> int:
-    adjusted = parent.blobs + blobs
-    return adjusted - min(TARGET_BLOBS_PER_BLOCK, adjusted)
+def calc_excess_blobs(parent: Header, new_blobs: int) -> int:
+    if parent.excess_blobs + new_blobs < TARGET_BLOBS_PER_BLOCK:
+        return 0
+    else:
+        return parent.excess_blobs + new_blobs - TARGET_BLOBS_PER_BLOCK
 ```
 
 ### Beacon chain validation
@@ -344,13 +346,10 @@ def get_intrinsic_gas(tx: SignedBlobTransaction, pre_state: ExecState) -> int:
     return intrinsic_gas
 
 def get_blob_gas(header: Header) -> int:
-    if header.blobs == 0:
-        return 0
-    else:
-        return fake_exponential(
-            header.blobs,
-            GASPRICE_UPDATE_FRACTION_PER_BLOB
-        )
+    return fake_exponential(
+        header.excess_blobs,
+        GASPRICE_UPDATE_FRACTION_PER_BLOB
+    )
 ```
 
 ### Networking