sidecarsToVersionedHashes

Extracts versioned hashes from blob sidecars by transforming their commitments.

Import

import "github.com/ChefBingbong/viem-go/utils/blob"
import "github.com/ChefBingbong/viem-go/utils/kzg"

Usage

import "github.com/ChefBingbong/viem-go/utils/blob"
import "github.com/ChefBingbong/viem-go/utils/kzg"

sidecars, _ := blob.ToBlobSidecars(blob.ToBlobSidecarsParams{
  Data: []byte("hello world"),
  Kzg:  kzgImpl,
})

// Extract versioned hashes from sidecars
versionedHashes := blob.SidecarsToVersionedHashes(sidecars, kzg.VersionedHashVersionKzg)
// [][]byte{...}

// Use default KZG version
versionedHashes = blob.SidecarsToVersionedHashesDefault(sidecars)

// Get as hex strings
hexHashes := blob.SidecarsToVersionedHashesHex(sidecars, kzg.VersionedHashVersionKzg)
// []string{"0x01...", "0x01...", ...}

Returns

• Type: [][]byte for SidecarsToVersionedHashes, []string for SidecarsToVersionedHashesHex

An array of versioned hashes, one for each sidecar. Each hash is 32 bytes.

Parameters

sidecars (required)

• Type: []blob.BlobSidecar for SidecarsToVersionedHashes, []blob.BlobSidecarHex for SidecarsHexToVersionedHashes

The blob sidecars to extract versioned hashes from.

sidecars, _ := blob.ToBlobSidecars(params)
versionedHashes := blob.SidecarsToVersionedHashes(sidecars, kzg.VersionedHashVersionKzg)

version (required)

• Type: byte

The version byte to use. For KZG commitments, use kzg.VersionedHashVersionKzg (0x01).

versionedHashes := blob.SidecarsToVersionedHashes(sidecars, kzg.VersionedHashVersionKzg)

Functions

SidecarsToVersionedHashes

Extracts versioned hashes from sidecars:

versionedHashes := blob.SidecarsToVersionedHashes(sidecars, kzg.VersionedHashVersionKzg)

SidecarsToVersionedHashesDefault

Extracts versioned hashes using the default KZG version:

versionedHashes := blob.SidecarsToVersionedHashesDefault(sidecars)

SidecarsToVersionedHashesHex

Extracts versioned hashes and returns hex strings:

hexHashes := blob.SidecarsToVersionedHashesHex(sidecars, kzg.VersionedHashVersionKzg)

SidecarsHexToVersionedHashes

Extracts versioned hashes from hex sidecars:

versionedHashes, _ := blob.SidecarsHexToVersionedHashes(hexSidecars, kzg.VersionedHashVersionKzg)

SidecarsHexToVersionedHashesHex

Extracts versioned hashes from hex sidecars and returns hex strings:

hexHashes, _ := blob.SidecarsHexToVersionedHashesHex(hexSidecars, kzg.VersionedHashVersionKzg)

Notes

• Extracts versioned hashes from the commitments in each sidecar
• Each versioned hash is 32 bytes (256 bits)
• The number of hashes equals the number of sidecars
• Used in EIP-4844 blob transactions to reference blob commitments