fix: remove node.js Buffer for better browser compatibility (#656)

Author: luizstacio

.changeset/wet-phones-search.md

@@ -0,0 +1,6 @@
+---
+"@fuel-ts/hasher": patch
+"@fuel-ts/keystore": patch
+---
+
+Remove node.js Buffer for browser compatibility

packages/hasher/package.json

@@ -30,6 +30,7 @@
     "@fuel-ts/math": "workspace:*",
     "@fuel-ts/providers": "workspace:*",
     "@fuel-ts/transactions": "workspace:*",
+    "@fuel-ts/keystore": "workspace:*",
     "lodash.clonedeep": "^4.5.0"
   },
   "devDependencies": {

packages/hasher/src/hasher.ts

@@ -1,6 +1,7 @@
 import type { BytesLike } from '@ethersproject/bytes';
 import { sha256 } from '@ethersproject/sha2';
 import { ZeroBytes32 } from '@fuel-ts/constants';
+import { bufferFromString } from '@fuel-ts/keystore';
 import { bn } from '@fuel-ts/math';
 import type { TransactionRequestLike } from '@fuel-ts/providers';
 import { transactionRequestify, TransactionType } from '@fuel-ts/providers';
@@ -15,7 +16,7 @@ import cloneDeep from 'lodash.clonedeep';
  * @returns A sha256 hash of the message
  */
 export function hashMessage(msg: string) {
-  return sha256(Buffer.from(msg));
+  return sha256(bufferFromString(msg, 'utf-8'));
 }
 
 /**

packages/keystore/src/aes-ctr-web.ts

@@ -15,7 +15,8 @@ export async function encrypt<T>(password: string, data: T): Promise<Keystore> {
   const iv = randomBytes(16);
   const salt = randomBytes(32);
   const secret = keyFromPassword(password, salt);
-  const dataBuffer = Uint8Array.from(Buffer.from(JSON.stringify(data), 'utf-8'));
+  const dataString = JSON.stringify(data);
+  const dataBuffer = bufferFromString(dataString, 'utf-8');
   const alg = {
     name: ALGORITHM,
     counter: iv,

packages/keystore/src/keystore.ts

@@ -4,7 +4,7 @@ import { encrypt as encWeb, decrypt as decWeb } from './aes-ctr-web';
 import { strategy } from './universal-crypto';
 
 export type { Keystore } from './aes-ctr';
-export { keyFromPassword } from './aes-ctr';
+export { keyFromPassword, bufferFromString, stringFromBuffer } from './aes-ctr';
 export { randomBytes } from './randomBytes';
 
 /**