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crypto/kzg4844: add comment about cells and cellIndices layout

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This commit is contained in:
Felix Lange 2026-04-22 18:22:00 +02:00
parent c9e6b687fe
commit 9f05d9df98
1 changed files with 9 additions and 0 deletions
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9
crypto/kzg4844/kzg4844.go
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@ -209,6 +209,13 @@ func IsValidVersionedHash(h []byte) bool {
} }
// VerifyCells verifies a batch of proofs corresponding to the cells and commitments. // VerifyCells verifies a batch of proofs corresponding to the cells and commitments.
//
// For this function, it is sufficient to only provide some of the cells.
// For each blob being proven, the cells slice must contain at least 64 items.
//
// The `cellIndices` specify which of the 128 cells of each blob are given.
// Thus, `len(cellIndices)` must be >= 64 and <= 128 to be valid, and
// `len(cells)` must be a multiple of `len(cellIndices)`.
func VerifyCells(cells []Cell, commitments []Commitment, proofs []Proof, cellIndices []uint64) error { func VerifyCells(cells []Cell, commitments []Commitment, proofs []Proof, cellIndices []uint64) error {
if useCKZG.Load() { if useCKZG.Load() {
return ckzgVerifyCells(cells, commitments, proofs, cellIndices) return ckzgVerifyCells(cells, commitments, proofs, cellIndices)
@ -225,6 +232,8 @@ func ComputeCells(blobs []Blob) ([]Cell, error) {
} }
// RecoverBlobs recovers blobs from the given cells and cell indices. // RecoverBlobs recovers blobs from the given cells and cell indices.
//
// For the layout of cells and cellIndices, please see [VerifyCells].
func RecoverBlobs(cells []Cell, cellIndices []uint64) ([]Blob, error) { func RecoverBlobs(cells []Cell, cellIndices []uint64) ([]Blob, error) {
if useCKZG.Load() { if useCKZG.Load() {
return ckzgRecoverBlobs(cells, cellIndices) return ckzgRecoverBlobs(cells, cellIndices)