eth2.0-specs/tests/formats/kzg_7594/verify_cell_kzg_proof.md

Test format: Verify cell KZG proof

Use the cell KZG proof to verify that the KZG commitment for a given cell is correct.

Test case format

The test data is declared in a data.yaml file:

input:
  commitment: Bytes48 -- the KZG commitment
  cell_id: CellID -- the identifier for the cell
  cell: Cell -- the cell
  proof: Bytes48 -- the KZG proof for the cell
output: bool -- true (correct proof) or false (incorrect proof)

• Bytes48 is a 48-byte hexadecimal string, prefixed with 0x.
• CellID is an unsigned 64-bit integer.
• Cell is a 2048-byte hexadecimal string, prefixed with 0x.

All byte(s) fields are encoded as strings, hexadecimal encoding, prefixed with 0x.

Condition

The verify_cell_kzg_proof handler should verify that commitment is a correct KZG commitment to cell by using the cell KZG proof proof, and the result should match the expected output. If the commitment or proof is invalid (e.g. not on the curve or not in the G1 subgroup of the BLS curve), cell is invalid (e.g. incorrect length or one of the 32-byte blocks does not represent a BLS field element), or cell_id is invalid (e.g. greater than the number of cells for an extended blob), it should error, i.e. the output should be null.