encodedLabelToLabelhash

Converts an encoded label (e.g., [abc123...]) to a labelhash. Returns empty string if the label is not a valid encoded labelhash.

Import

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

Usage

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

// Convert encoded label to labelhash
hash := ens.EncodedLabelToLabelhash("[4f5b812789fc606be1b3b16908db13fc7a9adf7ca72641f84d75b47069d3d7f0]")
// "0x4f5b812789fc606be1b3b16908db13fc7a9adf7ca72641f84d75b47069d3d7f0"

// Not an encoded label
hash = ens.EncodedLabelToLabelhash("eth")
// ""

Returns

• Type: string

The labelhash as a hex string with 0x prefix, or empty string if the input is not a valid encoded label.

Parameters

label (required)

• Type: string

The encoded label to convert. Must be in the format [<64 hex chars>].

hash := ens.EncodedLabelToLabelhash("[4f5b812789fc606be1b3b16908db13fc7a9adf7ca72641f84d75b47069d3d7f0]")
// "0x4f5b812789fc606be1b3b16908db13fc7a9adf7ca72641f84d75b47069d3d7f0"

hash = ens.EncodedLabelToLabelhash("eth")
// ""

Validation

The function validates:

1. Length must be exactly 66 characters ([ + 64 hex chars + ])
2. Must start with [
3. Must end with ]
4. Middle 64 characters must be valid hex

Notes

• Returns empty string for invalid encoded labels
• Used internally by Namehash and Labelhash to handle encoded labels
• Inverse operation of EncodeLabelhash
• Encoded labels are used to represent labelhashes in ENS names