fromBlobs

Transforms blobs back into the original data. This reverses the encoding performed by ToBlobs.

:::warning[Warning] This function transforms data from viem-go-shaped blobs. It is designed to be used with ToBlobs to convert arbitrary data to blobs. :::

Import

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

Usage

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

// Transform blobs back to data
blobs, _ := blob.ToBlobs([]byte("hello world"))
data, err := blob.FromBlobs(blobs)
if err != nil {
  log.Fatal(err)
}
// data = []byte("hello world")

// Transform hex blobs back to hex data
hexBlobs := []string{"0x...", "0x..."}
hexData, err := blob.FromBlobsHex(hexBlobs)
if err != nil {
  log.Fatal(err)
}
// hexData = "0x68656c6c6f20776f726c64"

// Transform hex blobs back to bytes
data, err = blob.FromBlobsToBytes(hexBlobs)
if err != nil {
  log.Fatal(err)
}
// data = []byte("hello world")

Returns

• Type: ([]byte, error) for FromBlobs, (string, error) for FromBlobsHex, ([]byte, error) for FromBlobsToBytes

The original data extracted from the blobs.

Parameters

blobs (required)

• Type: [][]byte for FromBlobs, []string for FromBlobsHex/FromBlobsToBytes

The blobs to transform back into data.

// Transform blobs back to bytes
blobs := [][]byte{...}
data, _ := blob.FromBlobs(blobs)

// Transform hex blobs back to hex data
hexBlobs := []string{"0x...", "0x..."}
hexData, _ := blob.FromBlobsHex(hexBlobs)

Decoding Process

The decoding process:

1. Reads each blob sequentially
2. Skips the zero byte at the start of each field element
3. Extracts data from the remaining 31 bytes
4. Stops when encountering the terminator byte (0x80) followed by only padding

Functions

FromBlobs

Transforms blobs back to bytes:

data, _ := blob.FromBlobs(blobs)

FromBlobsHex

Transforms hex blobs back to hex data:

hexData, _ := blob.FromBlobsHex(hexBlobs)

FromBlobsToBytes

Transforms hex blobs back to bytes:

data, _ := blob.FromBlobsToBytes(hexBlobs)

Notes

• The decoding process automatically handles multiple blobs
• Stops reading when the terminator byte is encountered
• Returns the original data exactly as it was encoded