From: Chris Duncan <chris@zoso.dev>
Date: Wed, 23 Jul 2025 20:34:37 +0000 (-0700)
Subject: Add destroy method to mnemonic class.
X-Git-Tag: v0.10.5~55^2~5
X-Git-Url: https://git.codecow.com/?a=commitdiff_plain;h=7a72aafd2376a6c1558cce99e19c26b6fd4f42fb;p=libnemo.git

Add destroy method to mnemonic class.
---

diff --git a/src/lib/bip39-mnemonic.ts b/src/lib/bip39-mnemonic.ts
index 668df57..8172081 100644
--- a/src/lib/bip39-mnemonic.ts
+++ b/src/lib/bip39-mnemonic.ts
@@ -12,8 +12,8 @@ import { Key } from '#types'
 */
 export class Bip39Mnemonic {
 	static #isInternal: boolean = false
-	#bip44Seed: Uint8Array<ArrayBuffer> | null = null
-	#blake2bSeed: Uint8Array<ArrayBuffer> | null = null
+	#bip44Seed?: Uint8Array<ArrayBuffer>
+	#blake2bSeed?: Uint8Array<ArrayBuffer>
 	#phrase: string = ''
 	get phrase (): string { return this.#phrase.normalize('NFKD') }
 
@@ -34,9 +34,9 @@ export class Bip39Mnemonic {
 	* @returns {string} Mnemonic phrase validated using the BIP-39 wordlist
 	*/
 	static async fromPhrase (phrase: string): Promise<Bip39Mnemonic> {
-		Bip39Mnemonic.#isInternal = true
+		this.#isInternal = true
 		const self = new this()
-		const isValid = await Bip39Mnemonic.validate(phrase)
+		const isValid = await this.validate(phrase)
 		if (isValid) {
 			self.#phrase = phrase.normalize('NFKD')
 			return self
@@ -66,7 +66,7 @@ export class Bip39Mnemonic {
 			concatenation = concatenation.substring(11)
 		}
 		const sentence = words.join(' ')
-		return Bip39Mnemonic.fromPhrase(sentence)
+		return this.fromPhrase(sentence)
 	}
 
 	/**
@@ -85,6 +85,18 @@ export class Bip39Mnemonic {
 		return checksum
 	}
 
+	/**
+	* Erases seed bytes and releases variable references to allow garbage
+	* collection.
+	*/
+	destroy () {
+		if (this.#bip44Seed != null) bytes.erase(this.#bip44Seed)
+		if (this.#blake2bSeed != null) bytes.erase(this.#blake2bSeed)
+		this.#bip44Seed = undefined
+		this.#blake2bSeed = undefined
+		this.#phrase = ''
+	}
+
 	/**
 	* Validates a mnemonic phrase.
 	*