add: compute_cells for getBlobsV2 (#7056)

* add: compute_cells for getBlobsV2

* updated link

Author: agnxsh

AllTests-mainnet.md

@@ -442,6 +442,17 @@ AllTests-mainnet
 ```
 ## EF - KZG - PeerDAS
 ```diff
++ KZG - Compute Cells - compute_cells_case_valid_419245fbfe69f145                            OK
++ KZG - Compute Cells - compute_cells_case_valid_4aedd1a2a3933c3e                            OK
++ KZG - Compute Cells - compute_cells_case_valid_6e773f256383918c                            OK
++ KZG - Compute Cells - compute_cells_case_valid_b0731ef77b166ca8                            OK
++ KZG - Compute Cells - compute_cells_case_valid_b81d309b22788820                            OK
++ KZG - Compute Cells - compute_cells_case_valid_ed8b5001151417d5                            OK
++ KZG - Compute Cells - compute_cells_case_valid_edeb8500a6507818                            OK
++ KZG - Compute Cells - compute_cells_invalid_blob_26555bdcbf18a267                          OK
++ KZG - Compute Cells - compute_cells_invalid_blob_79fb3cb1ef585a86                          OK
++ KZG - Compute Cells - compute_cells_invalid_blob_7e99dea8893c104a                          OK
++ KZG - Compute Cells - compute_cells_invalid_blob_9d88c33852eb782d                          OK
 + KZG - Compute Cells And Proofs - compute_cells_and_kzg_proofs_case_invalid_blob_26555bdcbf OK
 + KZG - Compute Cells And Proofs - compute_cells_and_kzg_proofs_case_invalid_blob_79fb3cb1ef OK
 + KZG - Compute Cells And Proofs - compute_cells_and_kzg_proofs_case_invalid_blob_7e99dea889 OK

tests/consensus_spec/test_fixture_kzg.nim

@@ -201,6 +201,26 @@ proc runComputeBlobKzgProofTest(suiteName, suitePath, path: string) =
       else:
         check p.get.bytes == fromHex[48](output.getStr).get
 
+proc runComputeCellsTest(suiteName, suitePath, path: string) =
+  let relativePathComponent = path.relativeTestPathComponent(suitePath)
+  test "KZG - Compute Cells - " & relativePathComponent:
+    let
+      data = loadToJson(os_ops.readFile(path/"data.yaml"))[0]
+      output = data["output"]
+      blob = fromHex[131072](data["input"]["blob"].getStr)
+
+    # https://github.com/ethereum/consensus-specs/blob/v1.5.0-beta.4/tests/formats/kzg_7594/compute_cells.md#condition
+    if blob.isNone:
+      check output.kind == JNull
+    else:
+      let p = newClone computeCells(KzgBlob(bytes: blob.get))
+      if p[].isErr:
+        check output.kind == JNull
+      else:
+        let p_val = p[].get
+        for i in 0..<len(p[].get):
+          check p_val[i].bytes == fromHex[2048](output[i].getStr).get
+
 proc runComputeCellsAndKzgProofsTest(suiteName, suitePath, path: string) =
   let relativePathComponent = path.relativeTestPathComponent(suitePath)
   test "KZG - Compute Cells And Proofs - " & relativePathComponent:
@@ -340,6 +360,11 @@ suite suiteName:
     ["compute_cells", "compute_cells_and_kzg_proofs",
      "recover_cells_and_kzg_proofs", "verify_cell_kzg_proof_batch"]
 
+  block:
+    let testsDir = suitePath/"compute_cells"/"kzg-mainnet"
+    for kind, path in walkDir(testsDir, relative = true, checkDir = true):
+      runComputeCellsTest(suiteName, testsDir, testsDir/path)
+
   block:
     let testsDir = suitePath/"compute_cells_and_kzg_proofs"/"kzg-mainnet"
     for kind, path in walkDir(testsDir, relative = true, checkDir = true):