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

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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:

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.