switch to main net address format

package.json

@@ -1,6 +1,6 @@
 {
   "name": "@tronscan/client",
-  "version": "0.1.1",
+  "version": "0.2.0",
   "description": "Tronscan API Client",
   "main": "src/index.js",
   "homepage": "https://api.tronscan.org/",

src/utils/address.js

@@ -1,6 +1,8 @@
-const ADDRESS_PREFIX = "a0";
-const ADDRESS_SIZE = 42;
+let isTestNet = process.env.NET === 'testnet';
 
+const ADDRESS_SIZE = 42;
+const ADDRESS_PREFIX = isTestNet ? "a0" : "41";
+const ADDRESS_PREFIX_BYTE = isTestNet ? 0xa0 : 0x41;
 
 function isAddressValid(address) {
 
@@ -21,4 +23,7 @@ function isAddressValid(address) {
 
 module.exports = {
   isAddressValid,
+  ADDRESS_SIZE,
+  ADDRESS_PREFIX,
+  ADDRESS_PREFIX_BYTE,
 };

src/utils/crypto.js

@@ -1,3 +1,4 @@
+const {ADDRESS_PREFIX, ADDRESS_PREFIX_BYTE} = require("./address");
 const base64EncodeToString = require("../lib/code").base64EncodeToString;
 const {base64DecodeFromString, hexStr2byteArray} = require("../lib/code");
 const {encode58, decode58} = require("../lib/base58");
@@ -6,10 +7,6 @@ const { keccak256 } = require('js-sha3');
 const jsSHA = require("../lib/sha256");
 const { byte2hexStr, byteArray2hexStr } = require("./bytes");
 
-const add_pre_fix = 'a0'; //a0 + address  ,a0 is version
-const add_pre_fix_byte = 0xa0;   //a0 + address  ,a0 is version
-
-
 /**
  * Sign A Transaction by priKey.
  * signature is 65 bytes, r[32] || s[32] || id[1](<27)
@@ -84,7 +81,7 @@ function computeAddress(pubBytes) {
 
   var hash = keccak256(pubBytes).toString();
   var addressHex = hash.substring(24);
-  addressHex = add_pre_fix + addressHex;
+  addressHex = ADDRESS_PREFIX + addressHex;
   var addressBytes = hexStr2byteArray(addressHex);
   return addressBytes;
 }
@@ -140,7 +137,7 @@ function isAddressValid(base58Sting) {
   if (address.length != 25) {
     return false;
   }
-  if (address[0] != add_pre_fix_byte) {
+  if (address[0] != ADDRESS_PREFIX_BYTE) {
     return false;
   }
   var checkSum = address.slice(21);