fix: remove enc-utils to remove buffer dep

buffer is not allowed in browsers

__tests__/ec.test.ts

@@ -1,6 +1,5 @@
-import { removeHexPrefix } from 'enc-utils';
-
 import { getKeyPair, getStarkKey, hashCalldata, hashMessage, pedersen, sign } from '../src';
+import { removeHexPrefix } from '../src/utils/enc';
 import { toBN, toHex } from '../src/utils/number';
 
 test('does work with package', () => {

__tests__/utils.test.ts

@@ -6,7 +6,7 @@ const { IS_BROWSER } = constants;
 const {
   json: { parse, stringify },
   starknet: { compressProgram, getSelectorFromName, makeAddress },
-  enc: { hexToDecimalString },
+  number: { hexToDecimalString },
 } = utils;
 
 const compiledArgentAccount = parse(

__tests__/wallet.test.ts

@@ -1,7 +1,5 @@
 import fs from 'fs';
 
-import { addHexPrefix } from 'enc-utils';
-
 import {
   CompiledContract,
   Contract,
@@ -13,6 +11,7 @@ import {
   utils,
   waitForTx,
 } from '../src';
+import { addHexPrefix } from '../src/utils/enc';
 import { toBN } from '../src/utils/number';
 
 const {

package.json

@@ -61,7 +61,6 @@
     "axios": "^0.23.0",
     "bn.js": "^5.2.0",
     "elliptic": "^6.5.4",
-    "enc-utils": "^3.0.0",
     "ethereum-cryptography": "^0.2.0",
     "hash.js": "^1.1.7",
     "json-bigint": "^1.0.0",

src/constants.ts

@@ -1,6 +1,6 @@
 import { toBN } from './utils/number';
 
-export const IS_BROWSER = typeof window !== 'undefined';
+export { IS_BROWSER } from './utils/enc';
 
 export const ZERO = toBN(0);
 export const ONE = toBN(1);

src/ec.ts

@@ -1,9 +1,9 @@
 import { ec as EC, curves } from 'elliptic';
-import { addHexPrefix, removeHexPrefix, sanitizeBytes } from 'enc-utils';
 import hashJS from 'hash.js';
 import assert from 'minimalistic-assert';
 
 import { CONSTANT_POINTS, EC_ORDER, FIELD_PRIME, MAX_ECDSA_VAL, ONE, ZERO } from './constants';
+import { addHexPrefix, removeHexPrefix, sanitizeBytes } from './utils/enc';
 import { BigNumberish, assertInRange, toBN, toHex } from './utils/number';
 
 export const ec = new EC(

src/utils/enc.ts

@@ -1,8 +1,7 @@
-import { IS_BROWSER } from '../constants';
-import { toBN } from './number';
+/* eslint-disable no-param-reassign */
+export const IS_BROWSER = typeof window !== 'undefined';
 
-export const hexToDecimalString = (hex: string): string =>
-  toBN(`0x${hex.replace(/^0x/, '')}`).toString();
+const STRING_ZERO = '0';
 
 export const arrayBufferToString = (array: ArrayBuffer): string =>
   String.fromCharCode.apply(null, array as unknown as number[]);
@@ -12,3 +11,53 @@ export const btoaUniversal = (b: ArrayBuffer): string =>
 
 export const buf2hex = (buffer: Uint8Array) =>
   [...buffer].map((x) => x.toString(16).padStart(2, '0')).join('');
+
+/**
+ * Some function imported from https://github.com/pedrouid/enc-utils/blob/master/src/index.ts
+ * enc-utils is no dependency to avoid using `Buffer` which just works in node and no browsers
+ */
+
+export function removeHexPrefix(hex: string): string {
+  return hex.replace(/^0x/, '');
+}
+
+export function addHexPrefix(hex: string): string {
+  return `0x${removeHexPrefix(hex)}`;
+}
+
+function padString(str: string, length: number, left: boolean, padding = STRING_ZERO): string {
+  const diff = length - str.length;
+  let result = str;
+  if (diff > 0) {
+    const pad = padding.repeat(diff);
+    result = left ? pad + str : str + pad;
+  }
+  return result;
+}
+
+export function padLeft(str: string, length: number, padding = STRING_ZERO): string {
+  return padString(str, length, true, padding);
+}
+
+export function calcByteLength(length: number, byteSize = 8): number {
+  const remainder = length % byteSize;
+  return remainder ? ((length - remainder) / byteSize) * byteSize + byteSize : length;
+}
+
+export function sanitizeBytes(str: string, byteSize = 8, padding = STRING_ZERO): string {
+  return padLeft(str, calcByteLength(str.length, byteSize), padding);
+}
+
+export function sanitizeHex(hex: string): string {
+  hex = removeHexPrefix(hex);
+  hex = sanitizeBytes(hex, 2);
+  if (hex) {
+    hex = addHexPrefix(hex);
+  }
+  return hex;
+}
+
+// implemented using TextEncoder to make it isomorphic
+export function utf8ToArray(str: string): Uint8Array {
+  return new TextEncoder().encode(str);
+}

src/utils/hash.ts

@@ -1,11 +1,10 @@
 import BN from 'bn.js';
-import { addHexPrefix, utf8ToArray } from 'enc-utils';
 import { keccak256 } from 'ethereum-cryptography/keccak';
 import assert from 'minimalistic-assert';
 
 import { CONSTANT_POINTS, FIELD_PRIME, MASK_250, ONE, ZERO } from '../constants';
 import { ec } from '../ec';
-import { buf2hex } from './enc';
+import { addHexPrefix, buf2hex, utf8ToArray } from './enc';
 import { BigNumberish, toBN } from './number';
 
 const keccakHex = (value: string): string => addHexPrefix(buf2hex(keccak256(utf8ToArray(value))));

src/utils/number.ts

@@ -1,7 +1,8 @@
 import BN from 'bn.js';
-import { addHexPrefix, removeHexPrefix } from 'enc-utils';
 import assert from 'minimalistic-assert';
 
+import { addHexPrefix, removeHexPrefix } from './enc';
+
 export type BigNumberish = string | number | BN;
 
 export const isHex = (hex: string): boolean => {
@@ -18,6 +19,9 @@ export const toHex = (number: BN): string => {
   return addHexPrefix(number.toString('hex'));
 };
 
+export const hexToDecimalString = (hex: string): string =>
+  toBN(`0x${hex.replace(/^0x/, '')}`).toString();
+
 /*
  Asserts input is equal to or greater then lowerBound and lower then upperBound.
  Assert message specifies inputName.

src/utils/starknet.ts

@@ -1,9 +1,8 @@
-import { addHexPrefix } from 'enc-utils';
 import { gzip } from 'pako';
 
 import { genKeyPair, getStarkKey } from '../ec';
 import { CompressedProgram, Program } from '../types';
-import { btoaUniversal } from './enc';
+import { addHexPrefix, btoaUniversal } from './enc';
 import { starknetKeccak } from './hash';
 import { stringify } from './json';
 import { toHex } from './number';