diff --git a/yarn.lock b/yarn.lock
index 5343154..dda5269 100644
--- a/yarn.lock
+++ b/yarn.lock
@@ -67,6 +67,11 @@
   resolved "https://registry.yarnpkg.com/@types/crypto-js/-/crypto-js-3.1.43.tgz#b859347d6289ba13e347c335a4c9efa63337a748"
   integrity sha512-EHe/YKctU3IYNBsDmSOPX/7jLHPRlx8WaiDKSY9JCTnJ8XJeM4c0ZJvx+9Gxmr2s2ihI92R+3U/gNL1sq5oRuQ==
 
+"@types/node@^8.0.0":
+  version "8.10.63"
+  resolved "https://registry.yarnpkg.com/@types/node/-/node-8.10.63.tgz#f86775d576bc07a2992da244f41c23d3ba66d402"
+  integrity sha512-g+nSkeHFDd2WOQChfmy9SAXLywT47WZBrGS/NC5ym5PJ8c8RC6l4pbGaUW/X0+eZJnXw6/AVNEouXWhV4iz72Q==
+
 "@types/node@^8.0.7":
   version "8.10.49"
   resolved "https://registry.yarnpkg.com/@types/node/-/node-8.10.49.tgz#f331afc5efed0796798e5591d6e0ece636969b7b"
@@ -409,6 +414,13 @@ balanced-match@^1.0.0:
   resolved "https://registry.yarnpkg.com/balanced-match/-/balanced-match-1.0.0.tgz#89b4d199ab2bee49de164ea02b89ce462d71b767"
   integrity sha1-ibTRmasr7kneFk6gK4nORi1xt2c=
 
+base-x@^3.0.2, base-x@^3.0.8:
+  version "3.0.8"
+  resolved "https://registry.yarnpkg.com/base-x/-/base-x-3.0.8.tgz#1e1106c2537f0162e8b52474a557ebb09000018d"
+  integrity sha512-Rl/1AWP4J/zRrk54hhlxH4drNxPJXYUaKffODVI53/dAsV4t9fBxyxYKAVPU1XBHxYwOWP9h9H0hM2MVw4YfJA==
+  dependencies:
+    safe-buffer "^5.0.1"
+
 base-x@^3.0.4:
   version "3.0.5"
   resolved "https://registry.yarnpkg.com/base-x/-/base-x-3.0.5.tgz#d3ada59afed05b921ab581ec3112e6444ba0795a"
@@ -444,6 +456,14 @@ base@^0.11.1:
     mixin-deep "^1.2.0"
     pascalcase "^0.1.1"
 
+bchaddrjs-slp@^0.2.8:
+  version "0.2.9"
+  resolved "https://registry.yarnpkg.com/bchaddrjs-slp/-/bchaddrjs-slp-0.2.9.tgz#fe1a90430a57f7d79b464a6b431557cb7cf74c94"
+  integrity sha512-+jWviCay+q8Kg73EpsKwHGipX3VBpyil4uGdLKEgj88sNqAM1fL7WZO0g+FbASF/n+TCYCPkBbM5TznRD1yHuA==
+  dependencies:
+    bs58check "^2.1.2"
+    cashaddrjs-slp "^0.2.12"
+
 bcrypt-pbkdf@^1.0.0:
   version "1.0.2"
   resolved "https://registry.yarnpkg.com/bcrypt-pbkdf/-/bcrypt-pbkdf-1.0.2.tgz#a4301d389b6a43f9b67ff3ca11a3f6637e360e9e"
@@ -458,6 +478,11 @@ better-assert@~1.0.0:
   dependencies:
     callsite "1.0.0"
 
+big-integer@^1.6.34:
+  version "1.6.48"
+  resolved "https://registry.yarnpkg.com/big-integer/-/big-integer-1.6.48.tgz#8fd88bd1632cba4a1c8c3e3d7159f08bb95b4b9e"
+  integrity sha512-j51egjPa7/i+RdiRuJbPdJ2FIUYYPhvYLjzoYbcMMm62ooO6F94fETG4MTs46zPAF9Brs04OajboA/qTGuz78w==
+
 binary-extensions@^1.0.0:
   version "1.13.1"
   resolved "https://registry.yarnpkg.com/binary-extensions/-/binary-extensions-1.13.1.tgz#598afe54755b2868a5330d2aff9d4ebb53209b65"
@@ -690,6 +715,22 @@ browserify@^15.1.0:
     vm-browserify "~0.0.1"
     xtend "^4.0.0"
 
+bs58@^4.0.0:
+  version "4.0.1"
+  resolved "https://registry.yarnpkg.com/bs58/-/bs58-4.0.1.tgz#be161e76c354f6f788ae4071f63f34e8c4f0a42a"
+  integrity sha1-vhYedsNU9veIrkBx9j806MTwpCo=
+  dependencies:
+    base-x "^3.0.2"
+
+bs58check@^2.1.2:
+  version "2.1.2"
+  resolved "https://registry.yarnpkg.com/bs58check/-/bs58check-2.1.2.tgz#53b018291228d82a5aa08e7d796fdafda54aebfc"
+  integrity sha512-0TS1jicxdU09dwJMNZtVAfzPi6Q6QeN0pM1Fkzrjn+XYHvzMKPU3pHVpva+769iNVSfIYWf7LJ6WR+BuuMf8cA==
+  dependencies:
+    bs58 "^4.0.0"
+    create-hash "^1.1.0"
+    safe-buffer "^5.1.2"
+
 buffer-alloc-unsafe@^1.1.0:
   version "1.1.0"
   resolved "https://registry.yarnpkg.com/buffer-alloc-unsafe/-/buffer-alloc-unsafe-1.1.0.tgz#bd7dc26ae2972d0eda253be061dba992349c19f0"
@@ -731,6 +772,14 @@ buffer@^5.0.2, buffer@^5.1.0:
     base64-js "^1.0.2"
     ieee754 "^1.1.4"
 
+buffer@^5.6.0:
+  version "5.6.0"
+  resolved "https://registry.yarnpkg.com/buffer/-/buffer-5.6.0.tgz#a31749dc7d81d84db08abf937b6b8c4033f62786"
+  integrity sha512-/gDYp/UtU0eA1ys8bOs9J6a+E/KWIY+DZ+Q2WESNUA0jFRsJOc0SNUO6xJ5SGA1xueg3NL65W6s+NY5l9cunuw==
+  dependencies:
+    base64-js "^1.0.2"
+    ieee754 "^1.1.4"
+
 buildmail@4.0.1:
   version "4.0.1"
   resolved "https://registry.yarnpkg.com/buildmail/-/buildmail-4.0.1.tgz#877f7738b78729871c9a105e3b837d2be11a7a72"
@@ -754,6 +803,15 @@ bytes@3.1.0:
   resolved "https://registry.yarnpkg.com/bytes/-/bytes-3.1.0.tgz#f6cf7933a360e0588fa9fde85651cdc7f805d1f6"
   integrity sha512-zauLjrfCG+xvoyaqLoV8bLVXXNGC4JqlxFCutSDWA6fJrTo2ZuvLYTqZ7aHBLZSMOopbzwv8f+wZcVzfVTI2Dg==
 
+c32check@^1.0.1:
+  version "1.1.2"
+  resolved "https://registry.yarnpkg.com/c32check/-/c32check-1.1.2.tgz#e84a66366bf9964ddf8d7b1f86d0e79281b8c8bd"
+  integrity sha512-YgmbvOQ9HfoH7ptW80JP6WJdgoHJFGqFjxaFYvwD+bU5i3dJ44a1LI0yxdiA2n/tVKq9W92tYcFjTP5hGlvhcg==
+  dependencies:
+    base-x "^3.0.8"
+    buffer "^5.6.0"
+    cross-sha256 "^1.1.2"
+
 cache-base@^1.0.1:
   version "1.0.1"
   resolved "https://registry.yarnpkg.com/cache-base/-/cache-base-1.0.1.tgz#0a7f46416831c8b662ee36fe4e7c59d76f666ab2"
@@ -801,6 +859,13 @@ caseless@~0.12.0:
   resolved "https://registry.yarnpkg.com/caseless/-/caseless-0.12.0.tgz#1b681c21ff84033c826543090689420d187151dc"
   integrity sha1-G2gcIf+EAzyCZUMJBolCDRhxUdw=
 
+cashaddrjs-slp@^0.2.12:
+  version "0.2.12"
+  resolved "https://registry.yarnpkg.com/cashaddrjs-slp/-/cashaddrjs-slp-0.2.12.tgz#30eda56cfc3ad4a949911258a0356459f45879d4"
+  integrity sha512-n2TTIuW6vZZxYvjvsUAA+wOM0Zkj+3RRKUtDC1XSu4Ic4XVr0yFJkl1bzQkHWda7nkVT51sxjZneygz7D0SyrQ==
+  dependencies:
+    big-integer "^1.6.34"
+
 cbor-js@^0.1.0:
   version "0.1.0"
   resolved "https://registry.yarnpkg.com/cbor-js/-/cbor-js-0.1.0.tgz#c80ce6120f387e8faa74370dfda21d965b8fc7f9"
@@ -1130,6 +1195,14 @@ create-hmac@^1.1.0, create-hmac@^1.1.2, create-hmac@^1.1.4:
     safe-buffer "^5.0.1"
     sha.js "^2.4.8"
 
+cross-sha256@^1.1.2:
+  version "1.1.2"
+  resolved "https://registry.yarnpkg.com/cross-sha256/-/cross-sha256-1.1.2.tgz#ca7c79fef95ddb38b33a074a33ce79b019d0c340"
+  integrity sha512-ZMGqJvPZQY/hmFvTJyM4LGVZIvEqD58GrCWA28goaDdo6wGzjgxWKEDxVfahkNCF/ryxBNfHe3Ql/BMSwPPbcg==
+  dependencies:
+    "@types/node" "^8.0.0"
+    buffer "^5.6.0"
+
 cross-spawn@^6.0.5:
   version "6.0.5"
   resolved "https://registry.yarnpkg.com/cross-spawn/-/cross-spawn-6.0.5.tgz#4a5ec7c64dfae22c3a14124dbacdee846d80cbc4"
@@ -1757,10 +1830,10 @@ esutils@^2.0.2:
   resolved "https://registry.yarnpkg.com/esutils/-/esutils-2.0.2.tgz#0abf4f1caa5bcb1f7a9d8acc6dea4faaa04bac9b"
   integrity sha1-Cr9PHKpbyx96nYrMbepPqqBLrJs=
 
-eventemitter3@^3.0.0:
-  version "3.1.2"
-  resolved "https://registry.yarnpkg.com/eventemitter3/-/eventemitter3-3.1.2.tgz#2d3d48f9c346698fce83a85d7d664e98535df6e7"
-  integrity sha512-tvtQIeLVHjDkJYnzf2dgVMxfuSGJeM/7UCG17TT4EumTfNtF+0nebF/4zWOIkCreAbtNqhGEboB6BWrwqNaw4Q==
+eventemitter3@^4.0.0:
+  version "4.0.7"
+  resolved "https://registry.yarnpkg.com/eventemitter3/-/eventemitter3-4.0.7.tgz#2de9b68f6528d5644ef5c59526a1b4a07306169f"
+  integrity sha512-8guHBZCwKnFhYdHr2ysuRWErTwhoN2X8XELRlrRwpmfeY2jjuUN4taQMsULKUVo1K4DvZl+0pgfyoysHxvmvEw==
 
 events@~1.1.0:
   version "1.1.1"
@@ -1946,11 +2019,9 @@ follow-redirects@1.0.0:
     debug "^2.2.0"
 
 follow-redirects@^1.0.0:
-  version "1.7.0"
-  resolved "https://registry.yarnpkg.com/follow-redirects/-/follow-redirects-1.7.0.tgz#489ebc198dc0e7f64167bd23b03c4c19b5784c76"
-  integrity sha512-m/pZQy4Gj287eNy94nivy5wchN3Kp+Q5WgUPNy5lJSZ3sgkVKSYV/ZChMAQVIgx1SqfZ2zBZtPA2YlXIWxxJOQ==
-  dependencies:
-    debug "^3.2.6"
+  version "1.13.0"
+  resolved "https://registry.yarnpkg.com/follow-redirects/-/follow-redirects-1.13.0.tgz#b42e8d93a2a7eea5ed88633676d6597bc8e384db"
+  integrity sha512-aq6gF1BEKje4a9i9+5jimNFIpq4Q1WiwBToeRK5NvZBd/TRsmW8BsJfOEGkr76TbOyPVD3OVDN910EcUNtRYEA==
 
 for-in@^1.0.2:
   version "1.0.2"
@@ -2324,11 +2395,11 @@ http-proxy-agent@^2.1.0:
     debug "3.1.0"
 
 http-proxy@^1.13.0:
-  version "1.17.0"
-  resolved "https://registry.yarnpkg.com/http-proxy/-/http-proxy-1.17.0.tgz#7ad38494658f84605e2f6db4436df410f4e5be9a"
-  integrity sha512-Taqn+3nNvYRfJ3bGvKfBSRwy1v6eePlm3oc/aWVxZp57DQr5Eq3xhKJi7Z4hZpS8PC3H4qI+Yly5EmFacGuA/g==
+  version "1.18.1"
+  resolved "https://registry.yarnpkg.com/http-proxy/-/http-proxy-1.18.1.tgz#401541f0534884bbf95260334e72f88ee3976549"
+  integrity sha512-7mz/721AbnJwIVbnaSv1Cz3Am0ZLT/UBwkC92VlxhXv/k/BBQfM2fXElQNC27BVGr0uwUpplYPQM9LnaBMR5NQ==
   dependencies:
-    eventemitter3 "^3.0.0"
+    eventemitter3 "^4.0.0"
     follow-redirects "^1.0.0"
     requires-port "^1.0.0"
 
@@ -2739,6 +2810,11 @@ isstream@~0.1.2:
   resolved "https://registry.yarnpkg.com/isstream/-/isstream-0.1.2.tgz#47e63f7af55afa6f92e1500e690eb8b8529c099a"
   integrity sha1-R+Y/evVa+m+S4VAOaQ64uFKcCZo=
 
+js-sha512@^0.8.0:
+  version "0.8.0"
+  resolved "https://registry.yarnpkg.com/js-sha512/-/js-sha512-0.8.0.tgz#dd22db8d02756faccf19f218e3ed61ec8249f7d4"
+  integrity sha512-PWsmefG6Jkodqt+ePTvBZCSMFgN7Clckjd0O7su3I0+BW2QWUTJNzjktHsztGLhncP2h8mcF9V9Y2Ha59pAViQ==
+
 "js-tokens@^3.0.0 || ^4.0.0":
   version "4.0.0"
   resolved "https://registry.yarnpkg.com/js-tokens/-/js-tokens-4.0.0.tgz#19203fb59991df98e3a287050d4647cdeaf32499"
@@ -4211,6 +4287,11 @@ ret@~0.1.10:
   resolved "https://registry.yarnpkg.com/ret/-/ret-0.1.15.tgz#b8a4825d5bdb1fc3f6f53c2bc33f81388681c7bc"
   integrity sha512-TTlYpa+OL+vMMNG24xSlQGEJ3B/RzEfUlLct7b5G/ytav+wPrplCpVMFuwzXbkecJrb6IYo1iFb0S9v37754mg==
 
+rfc4648@^1.3.0:
+  version "1.4.0"
+  resolved "https://registry.yarnpkg.com/rfc4648/-/rfc4648-1.4.0.tgz#c75b2856ad2e2d588b6ddb985d556f1f7f2a2abd"
+  integrity sha512-3qIzGhHlMHA6PoT6+cdPKZ+ZqtxkIvg8DZGKA5z6PQ33/uuhoJ+Ws/D/J9rXW6gXodgH8QYlz2UCl+sdUDmNIg==
+
 rimraf@^2.6.0, rimraf@^2.6.1, rimraf@~2.6.2:
   version "2.6.3"
   resolved "https://registry.yarnpkg.com/rimraf/-/rimraf-2.6.3.tgz#b2d104fe0d8fb27cf9e0a1cda8262dd3833c6cab"