BUILD

dist/es/hex.js

@@ -0,0 +1,46 @@
+/**
+ * compress/decompress hex-strings to utf16 or base64
+ * thx @juvian
+ * @link https://stackoverflow.com/a/40471908/3443137
+ */
+
+import * as util from './util';
+
+export function compress(hex) {
+    var base64 = arguments.length > 1 && arguments[1] !== undefined ? arguments[1] : false;
+
+    hex = util.removeTrailing0x(hex);
+
+    // if base64:true, we use our own function because it results in a smaller output
+    if (base64 === true) return new Buffer(hex, 'hex').toString('base64');
+
+    var string = '';
+    while (hex.length % 4 != 0) {
+        // we need it to be multiple of 4
+        hex = '0' + hex;
+    }
+    for (var i = 0; i < hex.length; i += 4) {
+        // get char from ascii code which goes from 0 to 65536
+        string += String.fromCharCode(parseInt(hex.substring(i, i + 4), 16));
+    }
+    return string;
+}
+
+export function decompress(compressedString) {
+    var base64 = arguments.length > 1 && arguments[1] !== undefined ? arguments[1] : false;
+
+
+    // if base64:true, we use our own function because it results in a smaller output
+    if (base64 === true) {
+        var ret = new Buffer(compressedString, 'base64').toString('hex');
+        return util.addTrailing0x(ret);
+    }
+
+    var hex = '';
+    for (var i = 0; i < compressedString.length; i++) {
+        // get character ascii code and convert to hexa string, adding necessary 0s
+        hex += ((i == 0 ? '' : '000') + compressedString.charCodeAt(i).toString(16)).slice(-4);
+    }
+    hex = hex.toLowerCase();
+    return util.addTrailing0x(hex);
+}

dist/es/index.js

@@ -8,10 +8,11 @@ import sign from './sign';
 import signTransaction from './sign-transaction';
 import txDataByCompiled from './tx-data-by-compiled';
 import * as hash from './hash';
+import * as hex from './hex';
 import * as vrs from './vrs';
 import * as util from './util';
 
-export { addressByPublicKey, createIdentity, decryptWithPrivateKey, encryptWithPublicKey, publicKeyByPrivateKey, recover, sign, signTransaction, txDataByCompiled, hash, vrs, util };
+export { addressByPublicKey, createIdentity, decryptWithPrivateKey, encryptWithPublicKey, publicKeyByPrivateKey, recover, sign, signTransaction, txDataByCompiled, hash, hex, vrs, util };
 
 export default {
     addressByPublicKey: addressByPublicKey,
@@ -24,6 +25,7 @@ export default {
     signTransaction: signTransaction,
     txDataByCompiled: txDataByCompiled,
     hash: hash,
+    hex: hex,
     vrs: vrs,
     util: util
 };

dist/es/util.js

@@ -1,3 +1,11 @@
 import Web3 from 'web3';
 
-export var web3 = new Web3();
+export var web3 = new Web3();
+
+export function removeTrailing0x(str) {
+    if (str.startsWith('0x')) return str.substring(2);else return str;
+}
+
+export function addTrailing0x(str) {
+    if (!str.startsWith('0x')) return '0x' + str;else return str;
+}

dist/lib/hex.js

@@ -0,0 +1,56 @@
+'use strict';
+
+Object.defineProperty(exports, "__esModule", {
+    value: true
+});
+exports.compress = compress;
+exports.decompress = decompress;
+
+var _util = require('./util');
+
+var util = _interopRequireWildcard(_util);
+
+function _interopRequireWildcard(obj) { if (obj && obj.__esModule) { return obj; } else { var newObj = {}; if (obj != null) { for (var key in obj) { if (Object.prototype.hasOwnProperty.call(obj, key)) newObj[key] = obj[key]; } } newObj['default'] = obj; return newObj; } }
+
+function compress(hex) {
+    var base64 = arguments.length > 1 && arguments[1] !== undefined ? arguments[1] : false;
+
+    hex = util.removeTrailing0x(hex);
+
+    // if base64:true, we use our own function because it results in a smaller output
+    if (base64 === true) return new Buffer(hex, 'hex').toString('base64');
+
+    var string = '';
+    while (hex.length % 4 != 0) {
+        // we need it to be multiple of 4
+        hex = '0' + hex;
+    }
+    for (var i = 0; i < hex.length; i += 4) {
+        // get char from ascii code which goes from 0 to 65536
+        string += String.fromCharCode(parseInt(hex.substring(i, i + 4), 16));
+    }
+    return string;
+} /**
+   * compress/decompress hex-strings to utf16 or base64
+   * thx @juvian
+   * @link https://stackoverflow.com/a/40471908/3443137
+   */
+
+function decompress(compressedString) {
+    var base64 = arguments.length > 1 && arguments[1] !== undefined ? arguments[1] : false;
+
+
+    // if base64:true, we use our own function because it results in a smaller output
+    if (base64 === true) {
+        var ret = new Buffer(compressedString, 'base64').toString('hex');
+        return util.addTrailing0x(ret);
+    }
+
+    var hex = '';
+    for (var i = 0; i < compressedString.length; i++) {
+        // get character ascii code and convert to hexa string, adding necessary 0s
+        hex += ((i == 0 ? '' : '000') + compressedString.charCodeAt(i).toString(16)).slice(-4);
+    }
+    hex = hex.toLowerCase();
+    return util.addTrailing0x(hex);
+}

dist/lib/index.js

@@ -3,7 +3,7 @@
 Object.defineProperty(exports, "__esModule", {
     value: true
 });
-exports.util = exports.vrs = exports.hash = exports.txDataByCompiled = exports.signTransaction = exports.sign = exports.recover = exports.publicKeyByPrivateKey = exports.encryptWithPublicKey = exports.decryptWithPrivateKey = exports.createIdentity = exports.addressByPublicKey = undefined;
+exports.util = exports.vrs = exports.hex = exports.hash = exports.txDataByCompiled = exports.signTransaction = exports.sign = exports.recover = exports.publicKeyByPrivateKey = exports.encryptWithPublicKey = exports.decryptWithPrivateKey = exports.createIdentity = exports.addressByPublicKey = undefined;
 
 var _addressByPublicKey = require('./address-by-public-key');
 
@@ -45,6 +45,10 @@ var _hash = require('./hash');
 
 var hash = _interopRequireWildcard(_hash);
 
+var _hex = require('./hex');
+
+var hex = _interopRequireWildcard(_hex);
+
 var _vrs = require('./vrs');
 
 var vrs = _interopRequireWildcard(_vrs);
@@ -67,6 +71,7 @@ exports.sign = _sign2['default'];
 exports.signTransaction = _signTransaction2['default'];
 exports.txDataByCompiled = _txDataByCompiled2['default'];
 exports.hash = hash;
+exports.hex = hex;
 exports.vrs = vrs;
 exports.util = util;
 exports['default'] = {
@@ -80,6 +85,7 @@ exports['default'] = {
     signTransaction: _signTransaction2['default'],
     txDataByCompiled: _txDataByCompiled2['default'],
     hash: hash,
+    hex: hex,
     vrs: vrs,
     util: util
 };

dist/lib/util.js

@@ -1,9 +1,11 @@
 'use strict';
 
 Object.defineProperty(exports, "__esModule", {
-  value: true
+    value: true
 });
 exports.web3 = undefined;
+exports.removeTrailing0x = removeTrailing0x;
+exports.addTrailing0x = addTrailing0x;
 
 var _web = require('web3');
 
@@ -11,4 +13,12 @@ var _web2 = _interopRequireDefault(_web);
 
 function _interopRequireDefault(obj) { return obj && obj.__esModule ? obj : { 'default': obj }; }
 
-var web3 = exports.web3 = new _web2['default']();
+var web3 = exports.web3 = new _web2['default']();
+
+function removeTrailing0x(str) {
+    if (str.startsWith('0x')) return str.substring(2);else return str;
+}
+
+function addTrailing0x(str) {
+    if (!str.startsWith('0x')) return '0x' + str;else return str;
+}