eth2.0-specs/tests/formats/kzg/compute_blob_kzg_proof.md

# Test format: Compute blob KZG proof

Compute the blob KZG proof for a given `blob`, that helps with quickly verifying that the KZG commitment for the blob is correct.

## Test case format

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

```yaml
input:
  blob: Blob -- the data blob
  commitment: Bytes48 -- the commitment to the blob
output: KZGProof -- The blob KZG proof
```

- `blob` here is encoded as a string: hexadecimal encoding of `4096 * 32 = 131072` bytes, prefixed with `0x`.
- `commitment` here is encoded as a string: hexadecimal encoding of `48` bytes, prefixed with `0x`.

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

## Condition

The `compute_blob_kzg_proof` handler should compute the blob KZG proof for `blob`, and the result should match the expected `output`. If the blob is invalid (e.g. incorrect length or one of the 32-byte blocks does not represent a BLS field element) it should error, i.e. the output should be `null`.
Test generators for kzg-4844 libraries (#3274) Arkworks integration and test generators for kzg-4844 libraries 2023-03-02 20:49:10 +00:00			`# Test format: Compute blob KZG proof`

			Compute the blob KZG proof for a given `blob`, that helps with quickly verifying that the KZG commitment for the blob is correct.

			`## Test case format`

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

			```yaml
			`input:`
			`blob: Blob -- the data blob`
Modify compute_[blob_]kzg_proof to remove superfluous computations (#3280) Add parameter `commitment` to `compute_blob_kzg_proof` and output `y` to `compute_kzg_proof` 2023-03-07 17:50:56 +00:00			`commitment: Bytes48 -- the commitment to the blob`
Test generators for kzg-4844 libraries (#3274) Arkworks integration and test generators for kzg-4844 libraries 2023-03-02 20:49:10 +00:00			`output: KZGProof -- The blob KZG proof`
			```

			- `blob` here is encoded as a string: hexadecimal encoding of `4096 * 32 = 131072` bytes, prefixed with `0x`.
Modify compute_[blob_]kzg_proof to remove superfluous computations (#3280) Add parameter `commitment` to `compute_blob_kzg_proof` and output `y` to `compute_kzg_proof` 2023-03-07 17:50:56 +00:00			- `commitment` here is encoded as a string: hexadecimal encoding of `48` bytes, prefixed with `0x`.
Test generators for kzg-4844 libraries (#3274) Arkworks integration and test generators for kzg-4844 libraries 2023-03-02 20:49:10 +00:00
			All byte(s) fields are encoded as strings, hexadecimal encoding, prefixed with `0x`.

			`## Condition`

			The `compute_blob_kzg_proof` handler should compute the blob KZG proof for `blob`, and the result should match the expected `output`. If the blob is invalid (e.g. incorrect length or one of the 32-byte blocks does not represent a BLS field element) it should error, i.e. the output should be `null`.