fix: unknown empty service IP (#299)

Author: shumkov

lib/constants/index.js

@@ -36,8 +36,6 @@ module.exports = {
     PORT: 2,
   },
   IP_ADDRESS_SIZE: 16,
-  EMPTY_IPV6_ADDRESS: '[0:0:0:0:0:0:0:0]:0',
-  EMPTY_IPV4_ADDRESS: '0.0.0.0:0',
   CURRENT_PROTOCOL_VERSION: 70211,
   SML_ENTRY_VERSION_1_SIZE: 151,
   SML_ENTRY_TYPE_2_ADDITION_SIZE: 22,

lib/util/ip.js

@@ -8,8 +8,18 @@ var serviceRegex =
   /^(([0-9]|[1-9][0-9]|1[0-9]{2}|2[0-4][0-9]|25[0-5])\.){3}([0-9]|[1-9][0-9]|1[0-9]{2}|2[0-4][0-9]|25[0-5]):[0-9]+$/;
 var ipV6prefix = Buffer.from('00000000000000000000ffff', 'hex');
 var emptyAddress = Buffer.alloc(18);
-var EMPTY_IPV6_ADDRESS = constants.EMPTY_IPV6_ADDRESS;
-var EMPTY_IPV4_ADDRESS = constants.EMPTY_IPV4_ADDRESS;
+var EMPTY_FULL_IPV6_ADDRESS = '[0:0:0:0:0:0:0:0]:0';
+var EMPTY_SHORT_IPV6_ADDRESS = '[::]:0';
+var EMPTY_SHORT_ZERO_IPV6_ADDRESS = '[::0]:0';
+var EMPTY_FULL_IPV4_ADDRESS = '0.0.0.0:0';
+var EMPTY_SHORT_IPV4_ADDRESS = '0:0';
+var EMPTY_ADDRESSES = [
+  EMPTY_FULL_IPV6_ADDRESS,
+  EMPTY_SHORT_IPV6_ADDRESS,
+  EMPTY_SHORT_ZERO_IPV6_ADDRESS,
+  EMPTY_FULL_IPV4_ADDRESS,
+  EMPTY_SHORT_IPV4_ADDRESS,
+];
 
 /**
  * Maps ipv4:port to ipv6 buffer and port
@@ -56,7 +66,7 @@ function bufferToIPAndPort(buffer) {
   var serviceString = ipV4string + ':' + String(port);
   // This is a hack to match core implementation, which in case of an empty address returns ipv6 string
   serviceString = isZeroAddress(serviceString)
-    ? EMPTY_IPV6_ADDRESS
+    ? EMPTY_FULL_IPV6_ADDRESS
     : serviceString;
   return serviceString;
 }
@@ -75,7 +85,7 @@ function isIpV4(ipAndPortString) {
  * @return {boolean}
  */
 function isZeroAddress(address) {
-  return address === EMPTY_IPV6_ADDRESS || address === EMPTY_IPV4_ADDRESS;
+  return EMPTY_ADDRESSES.includes(address);
 }
 
 var ip = {

test/util/ip.js

@@ -22,7 +22,7 @@ describe('ip', function () {
     });
     it('Should accept only zero ipv6, if ipv6 is passed as an arg, as implemented in dashcore', function () {
       var zeroaddressBuffer = ip.ipAndPortToBuffer(
-        constants.EMPTY_IPV6_ADDRESS
+        '[::]:0'
       );
       expect(zeroaddressBuffer.length).to.be.equal(18);
       expect(zeroaddressBuffer).to.be.deep.equal(Buffer.alloc(18));
@@ -61,7 +61,7 @@ describe('ip', function () {
     it('Should return zero ipv6 if hex is zero, as it works in dashcore', function () {
       var zeroBuffer = Buffer.alloc(18);
       var ipAndPort = ip.bufferToIPAndPort(zeroBuffer);
-      expect(ipAndPort).to.be.equal(constants.EMPTY_IPV6_ADDRESS);
+      expect(ipAndPort).to.be.equal('[0:0:0:0:0:0:0:0]:0');
     });
     it('Should throw if buffer size is different from ip and port size', function () {
       expect(ip.bufferToIPAndPort.bind(this, Buffer.alloc(19))).to.throw(