Add `RowIndex`, `ColumnIndex` custom types in crypto doc

specs/_features/eip7594/das-core.md

@@ -45,7 +45,6 @@ We define the following Python custom types for type hinting and readability:
 | `DataColumn`   | `List[Cell, MAX_BLOBS_PER_BLOCK]` | The data of each column in EIP7594 |
 | `ExtendedMatrix` | `List[Cell, MAX_BLOBS_PER_BLOCK * NUMBER_OF_COLUMNS]` | The full data with blobs and one-dimensional erasure coding extension |
 | `FlatExtendedMatrix` | `List[BLSFieldElement, MAX_BLOBS_PER_BLOCK * FIELD_ELEMENTS_PER_BLOB * NUMBER_OF_COLUMNS]` | The flattened format of `ExtendedMatrix` |
-| `LineIndex`    | `uint64` | The index of the rows or columns in `FlatExtendedMatrix` matrix |
 
 ## Configuration
 
@@ -68,11 +67,10 @@ We define the following Python custom types for type hinting and readability:
 #### `get_custody_lines`
 
 ```python
-def get_custody_lines(node_id: NodeID, custody_size: uint64) -> Sequence[LineIndex]:
+def get_custody_lines(node_id: NodeID, custody_size: uint64) -> Sequence[ColumnIndex]:
     assert custody_size <= NUMBER_OF_COLUMNS
-    all_items = list(range(NUMBER_OF_COLUMNS))
+    column_index = node_id % NUMBER_OF_COLUMNS
-    line_index = node_id % NUMBER_OF_COLUMNS
+    return [ColumnIndex((column_index + i) % NUMBER_OF_COLUMNS) for i in range(custody_size)]
-    return [LineIndex(all_items[(line_index + i) % len(all_items)]) for i in range(custody_size)]
 ```
 
 #### `compute_extended_data`

specs/_features/eip7594/p2p-interface.md

@@ -13,7 +13,7 @@
   - [Configuration](#configuration)
   - [Containers](#containers)
     - [`DataColumnSidecar`](#datacolumnsidecar)
-    - [`DataColumnIdentifier`](#datacolumnidentifier)
+    - [`DataColumnIndexentifier`](#dataColumnIndexentifier)
   - [Helpers](#helpers)
       - [`verify_data_column_sidecar_kzg_proof`](#verify_data_column_sidecar_kzg_proof)
       - [`verify_data_column_sidecar_inclusion_proof`](#verify_data_column_sidecar_inclusion_proof)
@@ -49,7 +49,7 @@
 
 ```python
 class DataColumnSidecar(Container):
-    index: LineIndex  # Index of column in extended matrix
+    index: ColumnIndex  # Index of column in extended matrix
     column: DataColumn
     kzg_commitments: List[KZGCommitment, MAX_BLOB_COMMITMENTS_PER_BLOCK]
     kzg_proofs: List[KZGProof, MAX_BLOB_COMMITMENTS_PER_BLOCK]
@@ -57,12 +57,12 @@ class DataColumnSidecar(Container):
     kzg_commitments_inclusion_proof: Vector[Bytes32, KZG_COMMITMENTS_INCLUSION_PROOF_DEPTH]
 ```
 
-#### `DataColumnIdentifier`
+#### `DataColumnIndexentifier`
 
 ```python
-class DataColumnIdentifier(Container):
+class DataColumnIndexentifier(Container):
     block_root: Root
-    index: LineIndex
+    index: ColumnIndex
 ```
 
 ### Helpers
@@ -74,14 +74,14 @@ def verify_data_column_sidecar_kzg_proof(sidecar: DataColumnSidecar) -> bool:
     """
     Verify if the proofs are correct
     """
-    row_ids = [LineIndex(i) for i in range(len(sidecar.column))]
+    row_ids = [RowIndex(i) for i in range(len(sidecar.column))]
     assert len(sidecar.column) == len(sidecar.kzg_commitments) == len(sidecar.kzg_proofs)
 
     # KZG batch verifies that the cells match the corresponding commitments and proofs
     return verify_cell_proof_batch(
         row_commitments=sidecar.kzg_commitments,
-        row_ids=row_ids,  # all rows
+        row_indices=row_ids,  # all rows
-        column_ids=[sidecar.index],
+        column_indices=[sidecar.index],
         datas=sidecar.column,
         proofs=sidecar.kzg_proofs,
     )
@@ -107,7 +107,7 @@ def verify_data_column_sidecar_inclusion_proof(sidecar: DataColumnSidecar) -> bo
 ##### `compute_subnet_for_data_column_sidecar`
 
 ```python
-def compute_subnet_for_data_column_sidecar(column_index: LineIndex) -> SubnetID:
+def compute_subnet_for_data_column_sidecar(column_index: ColumnIndex) -> SubnetID:
     return SubnetID(column_index % DATA_COLUMN_SIDECAR_SUBNET_COUNT)
 ```
 
@@ -167,7 +167,7 @@ Request Content:
 
 ```
 (
-  DataColumnIdentifier
+  DataColumnIndexentifier
 )
 ```
 

specs/_features/eip7594/polynomial-commitments-sampling.md

@@ -60,6 +60,8 @@ Public functions MUST accept raw bytes as input and perform the required cryptog
 | `PolynomialCoeff` | `List[BLSFieldElement, 2 * FIELD_ELEMENTS_PER_BLOB]` | A polynomial in coefficient form |
 | `Cell` | `Vector[BLSFieldElement, FIELD_ELEMENTS_PER_CELL]` | The unit of blob data that can come with their own KZG proofs |
 | `CellID` | `uint64` | Cell identifier |
+| `RowIndex` | `uint64` | Row identifier |
+| `ColumnIndex` | `uint64` | Column identifier |
 
 ## Constants
 
@@ -415,8 +417,8 @@ def verify_cell_proof(commitment: KZGCommitment,
 
 ```python
 def verify_cell_proof_batch(row_commitments: Sequence[KZGCommitment],
-                            row_ids: Sequence[int],
+                            row_indices: Sequence[RowIndex],
-                            column_ids: Sequence[int],
+                            column_indices: Sequence[ColumnIndex],
                             cells: Sequence[Cell],
                             proofs: Sequence[KZGProof]) -> bool:
     """
@@ -432,11 +434,11 @@ def verify_cell_proof_batch(row_commitments: Sequence[KZGCommitment],
     """
 
     # Get commitments via row IDs
-    commitments = [row_commitments[row_id] for row_id in row_ids]
+    commitments = [row_commitments[row_index] for row_index in row_indices]
     
     return all(
-        verify_kzg_proof_multi_impl(commitment, coset_for_cell(column_id), cell, proof)
+        verify_kzg_proof_multi_impl(commitment, coset_for_cell(column_index), cell, proof)
-        for commitment, column_id, cell, proof in zip(commitments, column_ids, cells, proofs)
+        for commitment, column_index, cell, proof in zip(commitments, column_indices, cells, proofs)
     )
 ```
 

tests/core/pyspec/eth2spec/test/eip7594/unittests/polynomial_commitments/test_polynomial_commitments.py

@@ -50,8 +50,8 @@ def test_verify_cell_proof_batch(spec):
 
     assert spec.verify_cell_proof_batch(
         row_commitments=[commitment],
-        row_ids=[0],
+        row_indices=[0],
-        column_ids=[0, 1],
+        column_indices=[0, 1],
         cells=cells[0:1],
         proofs=proofs,
     )