Add WalletConnect support

Co-authored-by: Njoku Emmanuel <kalunjoku123@gmail.com>
Signed-off-by: Alexis Sellier <self@cloudhead.io>

src/polyfills/enc-utils.js

@@ -0,0 +1,73 @@
+/* eslint-disable @typescript-eslint/naming-convention */
+/* eslint-disable @typescript-eslint/no-var-requires */
+
+"use strict";
+
+var Buffer = require("buffer/").Buffer;
+var typedarrayToBuffer = require("typedarray-to-buffer");
+
+const ENC_UTF8 = 'utf8';
+const ENC_HEX = 'hex';
+
+function bufferToArray(buf) {
+  return new Uint8Array(buf);
+}
+exports.bufferToArray = bufferToArray;
+
+function bufferToUtf8(buf) {
+  return buf.toString(ENC_UTF8);
+}
+exports.bufferToUtf8 = bufferToUtf8;
+
+function bufferToHex(buf, prefixed = false) {
+  const hex = buf.toString(ENC_HEX);
+  return prefixed ? addHexPrefix(hex) : hex;
+}
+exports.bufferToHex = bufferToHex;
+
+function utf8ToBuffer(utf8) {
+  return Buffer.from(utf8, ENC_UTF8);
+}
+exports.utf8ToBuffer = utf8ToBuffer;
+
+function utf8ToArray(utf8) {
+  return bufferToArray(utf8ToBuffer(utf8));
+}
+exports.utf8ToArray = utf8ToArray;
+
+function hexToArray(hex) {
+  return bufferToArray(hexToBuffer(hex));
+}
+exports.hexToArray = hexToArray;
+
+function hexToBuffer(hex) {
+  return Buffer.from(removeHexPrefix(hex), ENC_HEX);
+}
+exports.hexToBuffer = hexToBuffer;
+
+function removeHexPrefix(hex) {
+  return hex.replace(/^0x/, '');
+}
+exports.removeHexPrefix = removeHexPrefix;
+
+function addHexPrefix(hex) {
+  return hex.startsWith('0x') ? hex : `0x${hex}`;
+}
+exports.addHexPrefix = addHexPrefix;
+
+function arrayToBuffer(arr) {
+  return typedarrayToBuffer(arr);
+}
+exports.arrayToBuffer = arrayToBuffer;
+
+function arrayToHex(arr, prefixed = false) {
+  return bufferToHex(arrayToBuffer(arr), prefixed);
+}
+exports.arrayToHex = arrayToHex;
+
+function concatArrays(...args) {
+  let result = [];
+  args.forEach(arg => (result = result.concat(Array.from(arg))));
+  return new Uint8Array([...result]);
+}
+exports.concatArrays = concatArrays;

src/polyfills/typedarray-to-buffer.js

@@ -0,0 +1,17 @@
+/* eslint-disable @typescript-eslint/naming-convention */
+/* eslint-disable @typescript-eslint/no-var-requires */
+
+var isTypedArray = require('is-typedarray').strict;
+var Buffer = require('buffer/').Buffer;
+
+module.exports = function typedarrayToBuffer(arr) {
+  if (isTypedArray(arr)) {
+    var buf = Buffer.from(arr.buffer);
+    if (arr.byteLength !== arr.buffer.byteLength) {
+      buf = buf.slice(arr.byteOffset, arr.byteOffset + arr.byteLength);
+    }
+    return buf;
+  } else {
+    return Buffer.from(arr);
+  }
+};