AttDataIsEqual this function performs an equality check between 2 attestation data, if they're unequal, it will return false.

AttestingIndices returns the attesting participants indices from the attestation data.

CheckPointIsEqual performs an equality check between 2 check points, returns false if unequal.

ConvertToIndexed converts attestation to (almost) indexed-verifiable form.

IsValidAttestationIndices this helper function performs the first part of the spec indexed attestation validation starting at Check if ``indexed_attestation`` comment and ends at Verify aggregate signature comment.

VerifyIndexedAttestationSig this helper function performs the last part of the spec indexed attestation validation starting at Verify aggregate signature comment.