From 0646ee846c895b8b8ba590ba3b5fa80194589925 Mon Sep 17 00:00:00 2001
From: Chris Duncan <chris@codecow.com>
Date: Sun, 9 Aug 2026 12:22:28 -0700
Subject: [PATCH] Return bytes instead of buffer to enable array ops.

---
 src/lib/crypto/bip44.ts       | 8 ++++----
 src/lib/vault/vault-worker.ts | 6 +++---
 2 files changed, 7 insertions(+), 7 deletions(-)

diff --git a/src/lib/crypto/bip44.ts b/src/lib/crypto/bip44.ts
index 954f3f3..d17488d 100644
--- a/src/lib/crypto/bip44.ts
+++ b/src/lib/crypto/bip44.ts
@@ -24,10 +24,10 @@ const HARDENED_OFFSET: 0x80000000 = 0x80000000
  * @param {number} account - Account number between 0 and 2^31-1
  * @param {number} [change] - Used for change transactions, 0 for external and 1 for internal
  * @param {number} [address] - Sequentially increasing index of addresses to use for each account
- * @returns {Promise<ArrayBuffer>} Private child key for the account
+ * @returns {Promise<Bytes>} Private child key for the account
  */
-export function Bip44 (curve: Curve, seed: ArrayBuffer, coin: number, account: number, change?: number, address?: number): Promise<ArrayBuffer>
-export function Bip44 (curve: unknown, seed: unknown, coin: unknown, account: unknown, change?: unknown, address?: unknown): Promise<ArrayBuffer> {
+export function Bip44 (curve: Curve, seed: ArrayBuffer, coin: number, account: number, change?: number, address?: number): Promise<Bytes>
+export function Bip44 (curve: unknown, seed: unknown, coin: unknown, account: unknown, change?: unknown, address?: unknown): Promise<Bytes> {
 	if (curve !== 'Bitcoin seed' && curve !== 'ed25519 seed') {
 		throw new TypeError(`Unsupported curve ${curve}`)
 	}
@@ -61,7 +61,7 @@ export function Bip44 (curve: unknown, seed: unknown, coin: unknown, account: un
 	if (address !== undefined && (!Number.isSafeInteger(address) || address < 0 || address > 0x7fffffff)) {
 		throw new RangeError(`Invalid address index 0x${dec.toHex(account)}`)
 	}
-	return ckd(curve, seed, coin, account, change, address)
+	return new Uint8Array(ckd(curve, seed, coin, account, change, address))
 }
 
 function ckd (curve: Curve, seed: ArrayBuffer, coin: number, account: number, change?: number, address?: number): Promise<ArrayBuffer> {
diff --git a/src/lib/vault/vault-worker.ts b/src/lib/vault/vault-worker.ts
index 713602a..701ba53 100644
--- a/src/lib/vault/vault-worker.ts
+++ b/src/lib/vault/vault-worker.ts
@@ -448,9 +448,9 @@ const _index = new DataView(new ArrayBuffer(4))
  * https://docs.nano.org/integration-guides/the-basics/
  *
  * @param {number} index - 4-byte index of account to derive
- * @returns {Promise<ArrayBuffer>} Private key for the account
+ * @returns {Promise<Bytes>} Private key for the account
  */
-function _ckd (index?: number): Promise<ArrayBuffer> {
+function _ckd (index?: number): Promise<Bytes> {
 	if (_seed == null) {
 		throw new VaultError('Wallet seed not found')
 	}
@@ -468,7 +468,7 @@ function _ckd (index?: number): Promise<ArrayBuffer> {
 			_index.setUint32(0, index, false)
 			const sk = new Blake2b(32).update(_seed).update(_index.buffer).digest()
 			_index.setUint32(0, 0)
-			return Promise.resolve(sk.buffer)
+			return Promise.resolve(sk)
 		}
 	}
 }
-- 
2.52.0