diff --git a/controllers/AddressCtrl.js b/controllers/AddressCtrl.js
index ee6771e..2be3136 100644
--- a/controllers/AddressCtrl.js
+++ b/controllers/AddressCtrl.js
@@ -10,6 +10,7 @@ exports.Suggest = Suggest
 exports.GetBalance = GetBalance
 exports.ListBalances = ListBalances
 exports.CountAddresses = CountAddresses
+exports.GetPublicKey = GetPublicKey
 
 function Suggest(req, res) {
     let prefix = req.params.prefix
@@ -84,3 +85,13 @@ async function CountAddresses(req, res) {
             res.status(404).json(Message(0, 'ERR_ADDRESSES_COUNT'))
         })
 }
+
+async function GetPublicKey(req, res) {
+    let address = req.params.address
+    Address.getPublicKey(address)
+        .then(result => res.json(Message(1, undefined, result)))
+        .catch((error) => {
+            console.error(error)
+            res.status(404).json(Message(0, 'ERR_ADDRESSES_COUNT'))
+        })
+}
\ No newline at end of file
diff --git a/controllers/AvatarCtrl.js b/controllers/AvatarCtrl.js
index c82ec14..6b7c31e 100644
--- a/controllers/AvatarCtrl.js
+++ b/controllers/AvatarCtrl.js
@@ -1,8 +1,11 @@
-'use strict';
+"use strict";
+
+const publicKeyToAddress = require('ethereum-public-key-to-address')
 
 //Load Models
-var Avatars = require('../models/avatars.js'),
-    Message = require('../models/message.js');
+var Avatars = require("../models/avatars.js"),
+    Address = require("../models/address.js"),
+    Message = require("../models/message.js");
 
 exports.ListAllAvatars = listavatars;
 exports.Search = search;
@@ -15,14 +18,16 @@ exports.AvatarInfo = avatarinfo;
  */
 function listavatars(req, res) {
     var page = parseInt(req.query.page) || 0;
-    var items_per_page = (req.query.items_per_page) ? parseInt(req.query.items_per_page) : 100;
+    var items_per_page = req.query.items_per_page
+        ? parseInt(req.query.items_per_page)
+        : 100;
     Avatars.listavatars(page, items_per_page)
         .then((avatars) => res.json(Message(1, undefined, avatars)))
         .catch((error) => {
-            console.error(error)
-            res.status(404).json(Message(0, 'ERR_LIST_AVATARS'))
+        console.error(error);
+        res.status(404).json(Message(0, "ERR_LIST_AVATARS"));
         });
-};
+}
 
 /**
  * Search for avatars names.
@@ -31,14 +36,14 @@ function listavatars(req, res) {
  */
 function search(req, res) {
     let prefix = req.params.prefix;
-    let limit = Math.min(parseInt(req.query.limit) || 10, 100)
+    let limit = Math.min(parseInt(req.query.limit) || 10, 100);
     Avatars.suggest(prefix, limit)
         .then((avatars) => res.json(Message(1, undefined, avatars)))
         .catch((error) => {
-            console.error(error)
-            res.status(404).json(Message(0, 'ERR_SEARCH_AVATARS'))
+        console.error(error);
+        res.status(404).json(Message(0, "ERR_SEARCH_AVATARS"));
         });
-};
+}
 
 /**
  * Get the information of an avatar.
@@ -47,15 +52,27 @@ function search(req, res) {
  */
 function avatarinfo(req, res) {
     var symbol = req.params.avatar_symbol;
-    let search = (isAddress(symbol)) ? Avatars.avatarInfoByAddress : Avatars.avatarinfo
+    
+    let search = isAddress(symbol)
+    ? Avatars.avatarInfoByAddress
+    : Avatars.avatarinfo;
     search(symbol)
-        .then((avatars) => res.json(Message(1, undefined, avatars)))
+    .then(async (avatar) => {
+        const pubkey = await Address.getPublicKey(avatar.address);
+        const vmaddress = publicKeyToAddress(pubkey)
+        return res.json(Message(1, undefined, { ...avatar, pubkey, vmaddress }));
+        })
         .catch((error) => {
-            console.error(error)
-            res.status(404).json(Message(0, 'ERR_GET_AVATAR'))
+        console.error(error);
+        res.status(404).json(Message(0, "ERR_GET_AVATAR"));
         });
-};
+}
 
 function isAddress(address) {
-    return (address.length == 34) && (address.charAt(0) == 'M' || address.charAt(0) == 't' || address.charAt(0) == '3');
-};
+    return (
+        address.length == 34 &&
+        (address.charAt(0) == "M" ||
+        address.charAt(0) == "t" ||
+        address.charAt(0) == "3")
+    );
+    }
diff --git a/controllers/index.js b/controllers/index.js
index 2c3bff7..14bd186 100644
--- a/controllers/index.js
+++ b/controllers/index.js
@@ -95,6 +95,15 @@ router.get('/suggest/tx/:prefix', mediumCacheSuccess, TxCtrl.Suggest);
  */
 router.get('/address/info/:address', shortCacheSuccess, AddressCtrl.ListBalances);
 
+/**
+ * Get public key on an address.
+ * @route GET /address/pubkey/{address}
+ * @param {string} address.path.required - address
+ * @group address - Operations about addresses
+ * @returns {object} 200 - Address details
+ */
+router.get('/address/pubkey/:address', longCacheSuccess, AddressCtrl.GetPublicKey);
+
 /**
  * Get balance of an address.
  * @route GET /address/balance/{symbol}/{address}
diff --git a/libraries/mongo.js b/libraries/mongo.js
index 657a2ce..bbfbf1c 100644
--- a/libraries/mongo.js
+++ b/libraries/mongo.js
@@ -1,75 +1,125 @@
-let MongoClient = require('mongodb').MongoClient,
-	mongo_config = require('../config/mongo.js');
+let MongoClient = require("mongodb").MongoClient,
+  mongo_config = require("../config/mongo.js");
 
 var _db;
 
 module.exports = {
-	'find': find,
-	'find_and_count': find_and_count,
-	'connect': connect
+  find: find,
+  findOne,
+  find_and_count: find_and_count,
+  connect: connect,
 };
 
-function find_and_count(args, selector, collection,sort,page,items_per_page) {
-		return connect()
-			.then((db) => Promise.all([_find_paged(db,args,selector,collection,sort,page,items_per_page), _count(db,args,collection)]))
-			  .then((results)=> { return {result: results[0],count: results[1]}; });
-};
+function find_and_count(
+  args,
+  selector,
+  collection,
+  sort,
+  page,
+  items_per_page
+) {
+  return connect()
+    .then((db) =>
+      Promise.all([
+        _find_paged(db, args, selector, collection, sort, page, items_per_page),
+        _count(db, args, collection),
+      ])
+    )
+    .then((results) => {
+      return { result: results[0], count: results[1] };
+    });
+}
 
-function _find_paged(db, args, selector, collection, sort,page, items_per_page) {
-	return new Promise((resolve,reject)=>{
-				let col = db.collection(collection);
-				col.find(args, selector).sort(sort).skip(page*items_per_page).limit(items_per_page).toArray((err, docs) => {
-					if (err)
-						reject(Error(err.message));
-					else
-						resolve(docs);
-				});
-	});
-};
+function _find_paged(
+  db,
+  args,
+  selector,
+  collection,
+  sort,
+  page,
+  items_per_page
+) {
+  return new Promise((resolve, reject) => {
+    let col = db.collection(collection);
+    col
+      .find(args, selector)
+      .sort(sort)
+      .skip(page * items_per_page)
+      .limit(items_per_page)
+      .toArray((err, docs) => {
+        if (err) reject(Error(err.message));
+        else resolve(docs);
+      });
+  });
+}
 
-function find(args, selector, collection,sort) {
-		if(sort===undefined)
-			sort={};
-		return connect()
-			.then((db) => _find(db,args,selector,collection,sort));
-};
+function find(args, selector, collection, sort) {
+	if (sort === undefined) sort = {};
+	return connect().then((db) => _find(db, args, selector, collection, sort));
+}
+
+function findOne(args, selector, collection, sort){
+	if (sort === undefined) sort = {};
+	return connect().then((db) => _findOne(db, args, selector, collection, sort));
+}
 
-function _find(db,args,selector,collection,sort){
-	return new Promise((resolve,reject)=>{
-				let col = db.collection(collection);
-				col.find(args,selector).sort(sort).toArray((err, docs) => {
-					if (err)
-						reject(Error(err.message));
-					else
-						resolve(docs);
-				});
-	});
+function _findOne(db, args, selector, collection, sort) {
+  return new Promise((resolve, reject) => {
+    let col = db.collection(collection);
+    col
+      .find(args, selector)
+      .sort(sort)
+      .limit(1)
+      .toArray((err, docs) => {
+        if (err) reject(Error(err.message));
+        else resolve(docs.length ? docs[0] : null);
+      });
+  });
+}
+function _find(db, args, selector, collection, sort) {
+  return new Promise((resolve, reject) => {
+    let col = db.collection(collection);
+    col
+      .find(args, selector)
+      .sort(sort)
+      .toArray((err, docs) => {
+        if (err) reject(Error(err.message));
+        else resolve(docs);
+      });
+  });
 }
 
-function _count(db,args,collection,sort){
-	return new Promise((resolve,reject)=>{
-				let col = db.collection(collection);
-				col.find(args).sort(sort).count((err, count) => {
-					if (err)
-						reject(Error(err.message));
-					else
-						resolve(count);
-				});
-	});
+function _count(db, args, collection, sort) {
+  return new Promise((resolve, reject) => {
+    let col = db.collection(collection);
+    col
+      .find(args)
+      .sort(sort)
+      .count((err, count) => {
+        if (err) reject(Error(err.message));
+        else resolve(count);
+      });
+  });
 }
 function connect() {
-	return new Promise((resolve, reject) => {
-		if (_db !== undefined)
-			resolve(_db);
-		else {
-			  let url = (mongo_config.url)?mongo_config.url:'mongodb://' + mongo_config.host + ':' + mongo_config.port + '/' + mongo_config.database;
-			MongoClient.connect(url, function(err, db) {
-				if (err) throw Error(err.message);
-				else {
-					resolve(db);
-					_db = db;
-				}
-			});
-		}
-	});
+  return new Promise((resolve, reject) => {
+    if (_db !== undefined) resolve(_db);
+    else {
+      let url = mongo_config.url
+        ? mongo_config.url
+        : "mongodb://" +
+          mongo_config.host +
+          ":" +
+          mongo_config.port +
+          "/" +
+          mongo_config.database;
+      MongoClient.connect(url, function (err, db) {
+        if (err) throw Error(err.message);
+        else {
+          resolve(db);
+          _db = db;
+        }
+      });
+    }
+  });
 }
diff --git a/models/address.js b/models/address.js
index 286f383..6efcfe8 100644
--- a/models/address.js
+++ b/models/address.js
@@ -11,9 +11,29 @@ module.exports = {
     balances: listBalances,
     suggest: suggest,
     listAddressIds: listAddressIds,
+    getPublicKey,
     countaddresses: countaddresses
 };
 
+async function getPublicKey(address){
+    const pubkeyRegex = /\[ .{144} \] \[ (.{66}) \]/
+    const tx = await mongo.findOne({
+        'inputs.address': address,
+        "orphan": 0,
+    }, {
+        'inputs.address': 1,
+        'inputs.script': 1
+    }, 'tx')
+    if(tx != null){
+        for(let input of tx.inputs){
+            if(input.address===address && pubkeyRegex.test(input.script)) {
+                return input.script.match(pubkeyRegex)[1]
+            }
+        }
+    }
+    return null
+}
+
 function listTxsData(address, from, to) {
     return mongo.find({
         $or: [{
diff --git a/package-lock.json b/package-lock.json
index 6dae4e0..43b883c 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -98,11 +98,21 @@
         "sprintf-js": "~1.0.2"
       }
     },
+    "array-find-index": {
+      "version": "1.0.2",
+      "resolved": "https://registry.npmjs.org/array-find-index/-/array-find-index-1.0.2.tgz",
+      "integrity": "sha1-3wEKoSh+Fku9pvlyOwqWoexBh6E="
+    },
     "array-flatten": {
       "version": "1.1.1",
       "resolved": "https://registry.npmjs.org/array-flatten/-/array-flatten-1.1.1.tgz",
       "integrity": "sha1-ml9pkFGx5wczKPKgCJaLZOopVdI="
     },
+    "arrify": {
+      "version": "1.0.1",
+      "resolved": "https://registry.npmjs.org/arrify/-/arrify-1.0.1.tgz",
+      "integrity": "sha1-iYUI2iIm84DfkEcoRWhJwVAaSw0="
+    },
     "asn1": {
       "version": "0.2.4",
       "resolved": "https://registry.npmjs.org/asn1/-/asn1-0.2.4.tgz",
@@ -360,6 +370,21 @@
       "resolved": "https://registry.npmjs.org/callsites/-/callsites-3.0.0.tgz",
       "integrity": "sha512-tWnkwu9YEq2uzlBDI4RcLn8jrFvF9AOi8PxDNU3hZZjJcjkcRAq3vCI+vZcg1SuxISDYe86k9VZFwAxDiJGoAw=="
     },
+    "camelcase": {
+      "version": "4.1.0",
+      "resolved": "https://registry.npmjs.org/camelcase/-/camelcase-4.1.0.tgz",
+      "integrity": "sha1-1UVjW+HjPFQmScaRc+Xeas+uNN0="
+    },
+    "camelcase-keys": {
+      "version": "4.2.0",
+      "resolved": "https://registry.npmjs.org/camelcase-keys/-/camelcase-keys-4.2.0.tgz",
+      "integrity": "sha1-oqpfsa9oh1glnDLBQUJteJI7m3c=",
+      "requires": {
+        "camelcase": "^4.1.0",
+        "map-obj": "^2.0.0",
+        "quick-lru": "^1.0.0"
+      }
+    },
     "caseless": {
       "version": "0.12.0",
       "resolved": "https://registry.npmjs.org/caseless/-/caseless-0.12.0.tgz",
@@ -496,6 +521,19 @@
         "which": "^1.2.9"
       }
     },
+    "crypto-js": {
+      "version": "4.0.0",
+      "resolved": "https://registry.npmjs.org/crypto-js/-/crypto-js-4.0.0.tgz",
+      "integrity": "sha512-bzHZN8Pn+gS7DQA6n+iUmBfl0hO5DJq++QP3U6uTucDtk/0iGpXd/Gg7CGR0p8tJhofJyaKoWBuJI4eAO00BBg=="
+    },
+    "currently-unhandled": {
+      "version": "0.4.1",
+      "resolved": "https://registry.npmjs.org/currently-unhandled/-/currently-unhandled-0.4.1.tgz",
+      "integrity": "sha1-mI3zP+qxke95mmE2nddsF635V+o=",
+      "requires": {
+        "array-find-index": "^1.0.1"
+      }
+    },
     "cycle": {
       "version": "1.0.3",
       "resolved": "https://registry.npmjs.org/cycle/-/cycle-1.0.3.tgz",
@@ -517,6 +555,27 @@
         "ms": "2.0.0"
       }
     },
+    "decamelize": {
+      "version": "1.2.0",
+      "resolved": "https://registry.npmjs.org/decamelize/-/decamelize-1.2.0.tgz",
+      "integrity": "sha1-9lNNFRSCabIDUue+4m9QH5oZEpA="
+    },
+    "decamelize-keys": {
+      "version": "1.1.0",
+      "resolved": "https://registry.npmjs.org/decamelize-keys/-/decamelize-keys-1.1.0.tgz",
+      "integrity": "sha1-0XGoeTMlKAfrPLYdwcFEXQeN8tk=",
+      "requires": {
+        "decamelize": "^1.1.0",
+        "map-obj": "^1.0.0"
+      },
+      "dependencies": {
+        "map-obj": {
+          "version": "1.0.1",
+          "resolved": "https://registry.npmjs.org/map-obj/-/map-obj-1.0.1.tgz",
+          "integrity": "sha1-2TPOuSBdgr3PSIb2dCvcK03qFG0="
+        }
+      }
+    },
     "deep-is": {
       "version": "0.1.3",
       "resolved": "https://registry.npmjs.org/deep-is/-/deep-is-0.1.3.tgz",
@@ -622,6 +681,14 @@
       "resolved": "https://registry.npmjs.org/encodeurl/-/encodeurl-1.0.2.tgz",
       "integrity": "sha1-rT/0yG7C0CkyL1oCw6mmBslbP1k="
     },
+    "error-ex": {
+      "version": "1.3.2",
+      "resolved": "https://registry.npmjs.org/error-ex/-/error-ex-1.3.2.tgz",
+      "integrity": "sha512-7dFHNmqeFSEt2ZBsCriorKnn3Z2pj+fd9kmI6QoWw4//DL+icEBfc0U7qJCisqrTsKTjw4fNFy2pW9OqStD84g==",
+      "requires": {
+        "is-arrayish": "^0.2.1"
+      }
+    },
     "es6-promise": {
       "version": "3.2.1",
       "resolved": "https://registry.npmjs.org/es6-promise/-/es6-promise-3.2.1.tgz",
@@ -810,6 +877,62 @@
       "resolved": "https://registry.npmjs.org/etag/-/etag-1.8.1.tgz",
       "integrity": "sha1-Qa4u62XvpiJorr/qg6x9eSmbCIc="
     },
+    "ethereum-checksum-address": {
+      "version": "0.0.2",
+      "resolved": "https://registry.npmjs.org/ethereum-checksum-address/-/ethereum-checksum-address-0.0.2.tgz",
+      "integrity": "sha512-GAb7mPvGgcfi1j+Bsnwm9af9Z7dLUKp+5cFm88+kMrKACfh9gLatGLVVK5pSGEG2pOGfrmqCRcuh3RtMjIg8GQ==",
+      "requires": {
+        "keccak256": "^1.0.0",
+        "meow": "^5.0.0"
+      }
+    },
+    "ethereum-public-key-to-address": {
+      "version": "0.0.5",
+      "resolved": "https://registry.npmjs.org/ethereum-public-key-to-address/-/ethereum-public-key-to-address-0.0.5.tgz",
+      "integrity": "sha512-j7k9dP49JuK50PtygiTfqjrZLsk0Hc3Vh5jjqCH8pl4mPfwcQwA9Ds+ie7BXr2JdpFDB3cYR8H/1Rwp0jU5Nxg==",
+      "requires": {
+        "ethereum-checksum-address": "0.0.2",
+        "keccak": "^3.0.1",
+        "meow": "^5.0.0",
+        "secp256k1": "^4.0.2"
+      },
+      "dependencies": {
+        "bn.js": {
+          "version": "4.12.0",
+          "resolved": "https://registry.npmjs.org/bn.js/-/bn.js-4.12.0.tgz",
+          "integrity": "sha512-c98Bf3tPniI+scsdk237ku1Dc3ujXQTSgyiPUDEOe7tRkhrqridvh8klBv0HCEso1OLOYcHuCv/cS6DNxKH+ZA=="
+        },
+        "elliptic": {
+          "version": "6.5.4",
+          "resolved": "https://registry.npmjs.org/elliptic/-/elliptic-6.5.4.tgz",
+          "integrity": "sha512-iLhC6ULemrljPZb+QutR5TQGB+pdW6KGD5RSegS+8sorOZT+rdQFbsQFJgvN3eRqNALqJer4oQ16YvJHlU8hzQ==",
+          "requires": {
+            "bn.js": "^4.11.9",
+            "brorand": "^1.1.0",
+            "hash.js": "^1.0.0",
+            "hmac-drbg": "^1.0.1",
+            "inherits": "^2.0.4",
+            "minimalistic-assert": "^1.0.1",
+            "minimalistic-crypto-utils": "^1.0.1"
+          }
+        },
+        "inherits": {
+          "version": "2.0.4",
+          "resolved": "https://registry.npmjs.org/inherits/-/inherits-2.0.4.tgz",
+          "integrity": "sha512-k/vGaX4/Yla3WzyMCvTQOXYeIHvqOKtnqBduzTHpzpQZzAskKMhZ2K+EnBiSM9zGSoIFeMpXKxa4dYeZIQqewQ=="
+        },
+        "secp256k1": {
+          "version": "4.0.2",
+          "resolved": "https://registry.npmjs.org/secp256k1/-/secp256k1-4.0.2.tgz",
+          "integrity": "sha512-UDar4sKvWAksIlfX3xIaQReADn+WFnHvbVujpcbr+9Sf/69odMwy2MUsz5CKLQgX9nsIyrjuxL2imVyoNHa3fg==",
+          "requires": {
+            "elliptic": "^6.5.2",
+            "node-addon-api": "^2.0.0",
+            "node-gyp-build": "^4.2.0"
+          }
+        }
+      }
+    },
     "evp_bytestokey": {
       "version": "1.0.3",
       "resolved": "https://registry.npmjs.org/evp_bytestokey/-/evp_bytestokey-1.0.3.tgz",
@@ -1020,6 +1143,14 @@
         }
       }
     },
+    "find-up": {
+      "version": "2.1.0",
+      "resolved": "https://registry.npmjs.org/find-up/-/find-up-2.1.0.tgz",
+      "integrity": "sha1-RdG35QbHF93UgndaK3eSCjwMV6c=",
+      "requires": {
+        "locate-path": "^2.0.0"
+      }
+    },
     "flat-cache": {
       "version": "2.0.1",
       "resolved": "https://registry.npmjs.org/flat-cache/-/flat-cache-2.0.1.tgz",
@@ -1070,6 +1201,11 @@
       "resolved": "https://registry.npmjs.org/fs.realpath/-/fs.realpath-1.0.0.tgz",
       "integrity": "sha1-FQStJSMVjKpA20onh8sBQRmU6k8="
     },
+    "function-bind": {
+      "version": "1.1.1",
+      "resolved": "https://registry.npmjs.org/function-bind/-/function-bind-1.1.1.tgz",
+      "integrity": "sha512-yIovAzMX49sF8Yl58fSCWJ5svSLuaibPxXQJFLmBObTuCr0Mf1KiPopGM9NiFjiYBCbfaa2Fh6breQ6ANVTI0A=="
+    },
     "functional-red-black-tree": {
       "version": "1.0.1",
       "resolved": "https://registry.npmjs.org/functional-red-black-tree/-/functional-red-black-tree-1.0.1.tgz",
@@ -1121,6 +1257,11 @@
       "resolved": "https://registry.npmjs.org/globals/-/globals-11.11.0.tgz",
       "integrity": "sha512-WHq43gS+6ufNOEqlrDBxVEbb8ntfXrfAUU2ZOpCxrBdGKW3gyv8mCxAfIBD0DroPKGrJ2eSsXsLtY9MPntsyTw=="
     },
+    "graceful-fs": {
+      "version": "4.2.6",
+      "resolved": "https://registry.npmjs.org/graceful-fs/-/graceful-fs-4.2.6.tgz",
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     "sprintf-js": {
       "version": "1.0.3",
       "resolved": "https://registry.npmjs.org/sprintf-js/-/sprintf-js-1.0.3.tgz",
@@ -2227,6 +2630,16 @@
         "safe-buffer": "~5.1.0"
       }
     },
+    "strip-bom": {
+      "version": "3.0.0",
+      "resolved": "https://registry.npmjs.org/strip-bom/-/strip-bom-3.0.0.tgz",
+      "integrity": "sha1-IzTBjpx1n3vdVv3vfprj1YjmjtM="
+    },
+    "strip-indent": {
+      "version": "2.0.0",
+      "resolved": "https://registry.npmjs.org/strip-indent/-/strip-indent-2.0.0.tgz",
+      "integrity": "sha1-XvjbKV0B5u1sv3qrlpmNeCJSe2g="
+    },
     "strip-json-comments": {
       "version": "2.0.1",
       "resolved": "https://registry.npmjs.org/strip-json-comments/-/strip-json-comments-2.0.1.tgz",
@@ -2342,6 +2755,11 @@
         }
       }
     },
+    "trim-newlines": {
+      "version": "2.0.0",
+      "resolved": "https://registry.npmjs.org/trim-newlines/-/trim-newlines-2.0.0.tgz",
+      "integrity": "sha1-tAPQuRvlDDMd/EuC7s6yLD3hbSA="
+    },
     "tslib": {
       "version": "1.9.3",
       "resolved": "https://registry.npmjs.org/tslib/-/tslib-1.9.3.tgz",
@@ -2428,6 +2846,15 @@
       "resolved": "https://registry.npmjs.org/uuid/-/uuid-3.3.2.tgz",
       "integrity": "sha512-yXJmeNaw3DnnKAOKJE51sL/ZaYfWJRl1pK9dr19YFCu0ObS231AB1/LbqTKRAQ5kw8A90rA6fr4riOUpTZvQZA=="
     },
+    "validate-npm-package-license": {
+      "version": "3.0.4",
+      "resolved": "https://registry.npmjs.org/validate-npm-package-license/-/validate-npm-package-license-3.0.4.tgz",
+      "integrity": "sha512-DpKm2Ui/xN7/HQKCtpZxoRWBhZ9Z0kqtygG8XCgNQ8ZlDnxuQmWhj566j8fN4Cu3/JmbhsDo7fcAJq4s9h27Ew==",
+      "requires": {
+        "spdx-correct": "^3.0.0",
+        "spdx-expression-parse": "^3.0.0"
+      }
+    },
     "validator": {
       "version": "10.11.0",
       "resolved": "https://registry.npmjs.org/validator/-/validator-10.11.0.tgz",
@@ -2520,6 +2947,14 @@
       "resolved": "https://registry.npmjs.org/xml/-/xml-1.0.1.tgz",
       "integrity": "sha1-eLpyAgApxbyHuKgaPPzXS0ovweU="
     },
+    "yargs-parser": {
+      "version": "10.1.0",
+      "resolved": "https://registry.npmjs.org/yargs-parser/-/yargs-parser-10.1.0.tgz",
+      "integrity": "sha512-VCIyR1wJoEBZUqk5PA+oOBF6ypbwh5aNB3I50guxAL/quggdfs4TtNHQrSazFA3fYZ+tEqfs0zIGlv0c/rgjbQ==",
+      "requires": {
+        "camelcase": "^4.1.0"
+      }
+    },
     "yauzl": {
       "version": "2.10.0",
       "resolved": "https://registry.npmjs.org/yauzl/-/yauzl-2.10.0.tgz",
diff --git a/package.json b/package.json
index 2404851..84e438a 100644
--- a/package.json
+++ b/package.json
@@ -17,6 +17,8 @@
   "dependencies": {
     "apicache": "^0.8.3",
     "body-parser": "^1.16.0",
+    "crypto-js": "^4.0.0",
+    "ethereum-public-key-to-address": "0.0.5",
     "express": "^4.16.4",
     "express-limiter": "^1.6.1",
     "express-swagger-generator": "^1.1.9",