Added slice and missing Math libraries for limited environments.

utils/address.js

@@ -31,6 +31,15 @@ function getChecksumAddress(address) {
     return '0x' + address.join('');
 }
 
+// Shims for environments that are missing some required constants and functions
+var MAX_SAFE_INTEGER = 0x1fffffffffffff;
+
+function log10(x) {
+    if (Math.log10) { return Math.log10(x); }
+    return Math.log(x) / Math.LN10;
+}
+
+
 // See: https://en.wikipedia.org/wiki/International_Bank_Account_Number
 var ibanChecksum = (function() {
 
@@ -40,7 +49,7 @@ var ibanChecksum = (function() {
     for (var i = 0; i < 26; i++) { ibanLookup[String.fromCharCode(65 + i)] = String(10 + i); }
 
     // How many decimal digits can we process? (for 64-bit float, this is 15)
-    var safeDigits = Math.floor(Math.log10(Number.MAX_SAFE_INTEGER));
+    var safeDigits = Math.floor(log10(MAX_SAFE_INTEGER));
 
     return function(address) {
         address = address.toUpperCase();

utils/browser-random-bytes.js

@@ -1,6 +1,7 @@
 'use strict';
 
-var defineProperty = require('./properties.js').defineProperty;
+var convert = require('./convert');
+var defineProperty = require('./properties').defineProperty;
 
 var crypto = global.crypto || global.msCrypto;
 if (!crypto || !crypto.getRandomValues) {
@@ -32,7 +33,7 @@ function randomBytes(length) {
 
     var result = new Uint8Array(length);
     crypto.getRandomValues(result);
-    return result;
+    return convert.arrayify(result);
 };
 
 if (crypto._weakCrypto === true) {

utils/convert.js

@@ -6,6 +6,17 @@
 var defineProperty = require('./properties.js').defineProperty;
 var throwError = require('./throw-error');
 
+function addSlice(array) {
+    if (array.slice) { return array; }
+
+    array.slice = function() {
+        var args = Array.prototype.slice.call(arguments);
+        return new Uint8Array(Array.prototype.slice.apply(array, args));
+    }
+
+    return array;
+}
+
 function isArrayish(value) {
     if (!value || parseInt(value.length) != value.length || typeof(value) === 'string') {
         return false;
@@ -36,11 +47,11 @@ function arrayify(value, name) {
             result.push(parseInt(value.substr(i, 2), 16));
         }
 
-        return new Uint8Array(result);
+        return addSlice(new Uint8Array(result));
     }
 
     if (isArrayish(value)) {
-        return new Uint8Array(value);
+        return addSlice(new Uint8Array(value));
     }
 
     throwError('invalid arrayify value', { name: name, input: value });
@@ -62,7 +73,7 @@ function concat(objects) {
         offset += arrays[i].length;
     }
 
-    return result;
+    return addSlice(result);
 }
 function stripZeros(value) {
     value = arrayify(value);
@@ -88,7 +99,7 @@ function padZeros(value, length) {
 
     var result = new Uint8Array(length);
     result.set(value, length - value.length);
-    return result;
+    return addSlice(result);
 }
 
 

utils/package.json

@@ -1,6 +1,6 @@
 {
   "name": "ethers-utils",
-  "version": "2.1.4",
+  "version": "2.1.5",
   "description": "Utilities for the Ethers Ethereum library.",
   "bugs": {
     "url": "http://github.com/ethers-io/ethers.js/issues",

utils/pbkdf2.js

@@ -39,7 +39,7 @@ function pbkdf2(password, salt, iterations, keylen, createHmac) {
         var destPos = (i - 1) * hLen
         var len = (i === l ? r : hLen)
         //T.copy(DK, destPos, 0, len)
-        DK.set(T.slice(0, len), destPos);
+        DK.set(Array.prototype.slice.call(T, 0, len), destPos);
 
     }