From 89ae21f796c4587488f172e6b6039fd39fcb35f3 Mon Sep 17 00:00:00 2001
From: fiatjaf <fiatjaf@gmail.com>
Date: Wed, 21 Dec 2022 16:04:09 -0300
Subject: [PATCH] remove buffer usage everywhere.

---
 event.ts | 12 ++++++------
 keys.ts  |  5 ++---
 nip06.ts |  7 ++++---
 3 files changed, 12 insertions(+), 12 deletions(-)

diff --git a/event.ts b/event.ts
index 8b93890..e18c489 100644
--- a/event.ts
+++ b/event.ts
@@ -1,8 +1,8 @@
-import {Buffer} from 'buffer'
-// @ts-ignore
 import * as secp256k1 from '@noble/secp256k1'
 import {sha256} from '@noble/hashes/sha256'
 
+import {utf8Encoder} from './utils'
+
 export type Event = {
   id?: string
   sig?: string
@@ -35,8 +35,8 @@ export function serializeEvent(evt: Event): string {
 }
 
 export function getEventHash(event: Event): string {
-  let eventHash = sha256(Buffer.from(serializeEvent(event)))
-  return Buffer.from(eventHash).toString('hex')
+  let eventHash = sha256(utf8Encoder.encode(serializeEvent(event)))
+  return secp256k1.utils.bytesToHex(eventHash)
 }
 
 export function validateEvent(event: Event): boolean {
@@ -63,7 +63,7 @@ export function verifySignature(
 }
 
 export async function signEvent(event: Event, key: string): Promise<string> {
-  return Buffer.from(
+  return secp256k1.utils.bytesToHex(
     await secp256k1.schnorr.sign(event.id || getEventHash(event), key)
-  ).toString('hex')
+  )
 }
diff --git a/keys.ts b/keys.ts
index 6fbf82a..76d4d33 100644
--- a/keys.ts
+++ b/keys.ts
@@ -1,10 +1,9 @@
 import * as secp256k1 from '@noble/secp256k1'
-import {Buffer} from 'buffer'
 
 export function generatePrivateKey(): string {
-  return Buffer.from(secp256k1.utils.randomPrivateKey()).toString('hex')
+  return secp256k1.utils.bytesToHex(secp256k1.utils.randomPrivateKey())
 }
 
 export function getPublicKey(privateKey: string): string {
-  return Buffer.from(secp256k1.schnorr.getPublicKey(privateKey)).toString('hex')
+  return secp256k1.utils.bytesToHex(secp256k1.schnorr.getPublicKey(privateKey))
 }
diff --git a/nip06.ts b/nip06.ts
index b2bec3e..d1e6708 100644
--- a/nip06.ts
+++ b/nip06.ts
@@ -1,3 +1,4 @@
+import * as secp256k1 from '@noble/secp256k1'
 import {wordlist} from '@scure/bip39/wordlists/english.js'
 import {
   generateMnemonic,
@@ -7,14 +8,14 @@ import {
 import {HDKey} from '@scure/bip32'
 
 export function privateKeyFromSeed(seed: string): string {
-  let root = HDKey.fromMasterSeed(Buffer.from(seed, 'hex'))
+  let root = HDKey.fromMasterSeed(secp256k1.utils.hexToBytes(seed))
   let privateKey = root.derive(`m/44'/1237'/0'/0/0`).privateKey
   if (!privateKey) throw new Error('could not derive private key')
-  return Buffer.from(privateKey).toString('hex')
+  return secp256k1.utils.bytesToHex(privateKey)
 }
 
 export function seedFromWords(mnemonic: string): string {
-  return Buffer.from(mnemonicToSeedSync(mnemonic)).toString('hex')
+  return secp256k1.utils.bytesToHex(mnemonicToSeedSync(mnemonic))
 }
 
 export function generateSeedWords(): string {