diff --git a/package-lock.json b/package-lock.json
index ad92de5bf..e2bfde0fd 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -35,12 +35,14 @@
     "after": {
       "version": "0.8.2",
       "resolved": "https://registry.npmjs.org/after/-/after-0.8.2.tgz",
-      "integrity": "sha1-/ts5T58OAqqXaOcCvaI7UF+ufh8="
+      "integrity": "sha1-/ts5T58OAqqXaOcCvaI7UF+ufh8=",
+      "optional": true
     },
     "ansi-regex": {
       "version": "2.1.1",
       "resolved": "https://registry.npmjs.org/ansi-regex/-/ansi-regex-2.1.1.tgz",
-      "integrity": "sha1-w7M6te42DYbg5ijwRorn7yfWVN8="
+      "integrity": "sha1-w7M6te42DYbg5ijwRorn7yfWVN8=",
+      "optional": true
     },
     "aproba": {
       "version": "1.1.2",
@@ -61,12 +63,23 @@
     "arraybuffer.slice": {
       "version": "0.0.6",
       "resolved": "https://registry.npmjs.org/arraybuffer.slice/-/arraybuffer.slice-0.0.6.tgz",
-      "integrity": "sha1-8zshWfBTKj8xB6JywMz70a0peco="
+      "integrity": "sha1-8zshWfBTKj8xB6JywMz70a0peco=",
+      "optional": true
     },
     "async": {
-      "version": "1.4.2",
-      "resolved": "https://registry.npmjs.org/async/-/async-1.4.2.tgz",
-      "integrity": "sha1-bJ7csRztTw3S8tQNsNSaEJwIiqs="
+      "version": "2.6.4",
+      "resolved": "https://registry.npmjs.org/async/-/async-2.6.4.tgz",
+      "integrity": "sha512-mzo5dfJYwAn29PeiJ0zvwTo04zj8HDJj0Mn8TD7sno7q12prdbnasKJHhkm2c1LgrhlJ0teaea8860oxi51mGA==",
+      "requires": {
+        "lodash": "^4.17.14"
+      },
+      "dependencies": {
+        "lodash": {
+          "version": "4.17.21",
+          "resolved": "https://registry.npmjs.org/lodash/-/lodash-4.17.21.tgz",
+          "integrity": "sha512-v2kDEe57lecTulaDIuNTPy3Ry4gLGJ6Z1O3vE1krgXZNrsQ+LFTGHVxVjcXPs17LhbZVGedAJv8XZ1tvj5FvSg=="
+        }
+      }
     },
     "backo2": {
       "version": "1.0.2",
@@ -91,7 +104,8 @@
     "base64-arraybuffer": {
       "version": "0.1.5",
       "resolved": "https://registry.npmjs.org/base64-arraybuffer/-/base64-arraybuffer-0.1.5.tgz",
-      "integrity": "sha1-c5JncZI7Whl0etZmqlzUv5xunOg="
+      "integrity": "sha1-c5JncZI7Whl0etZmqlzUv5xunOg=",
+      "optional": true
     },
     "base64id": {
       "version": "1.0.0",
@@ -101,6 +115,7 @@
     },
     "bcoin": {
       "version": "github:bcoin-org/bcoin#886008a1822ce1da7fa8395ee7db4bcc1750a28a",
+      "from": "github:bcoin-org/bcoin#886008a1822ce1da7fa8395ee7db4bcc1750a28a",
       "requires": {
         "bcoin-native": "0.0.20",
         "bn.js": "4.11.7",
@@ -147,6 +162,7 @@
       "version": "1.0.2",
       "resolved": "https://registry.npmjs.org/better-assert/-/better-assert-1.0.2.tgz",
       "integrity": "sha1-QIZrnhueC1W0gYlDEeaPr/rrxSI=",
+      "optional": true,
       "requires": {
         "callsite": "1.0.0"
       }
@@ -345,7 +361,8 @@
     "blob": {
       "version": "0.0.4",
       "resolved": "https://registry.npmjs.org/blob/-/blob-0.0.4.tgz",
-      "integrity": "sha1-vPEwUspURj8w+fx+lbmkdjCpSSE="
+      "integrity": "sha1-vPEwUspURj8w+fx+lbmkdjCpSSE=",
+      "optional": true
     },
     "bloom-filter": {
       "version": "0.2.0",
@@ -553,12 +570,14 @@
     },
     "buffers": {
       "version": "github:bitpay/node-buffers#04f4c4264e0d105db2b99b786843ed64f23230d8",
+      "from": "github:bitpay/node-buffers#04f4c4264e0d105db2b99b786843ed64f23230d8",
       "dev": true
     },
     "callsite": {
       "version": "1.0.0",
       "resolved": "https://registry.npmjs.org/callsite/-/callsite-1.0.0.tgz",
-      "integrity": "sha1-KAOY5dZkvXQDi28JBRU+borxvCA="
+      "integrity": "sha1-KAOY5dZkvXQDi28JBRU+borxvCA=",
+      "optional": true
     },
     "chai": {
       "version": "3.5.0",
@@ -612,6 +631,7 @@
       "version": "1.0.4",
       "resolved": "https://registry.npmjs.org/cipher-base/-/cipher-base-1.0.4.tgz",
       "integrity": "sha512-Kkht5ye6ZGmwv40uUDZztayT2ThLQGfnj/T71N/XzeZeo3nf8foyW7zGTsPYkEya3m5f3cAypH+qe7YOrM1U2Q==",
+      "optional": true,
       "requires": {
         "inherits": "2.0.1",
         "safe-buffer": "5.1.1"
@@ -640,7 +660,8 @@
     "code-point-at": {
       "version": "1.1.0",
       "resolved": "https://registry.npmjs.org/code-point-at/-/code-point-at-1.1.0.tgz",
-      "integrity": "sha1-DQcLTQQ6W+ozovGkDi7bPZpMz3c="
+      "integrity": "sha1-DQcLTQQ6W+ozovGkDi7bPZpMz3c=",
+      "optional": true
     },
     "colors": {
       "version": "1.0.3",
@@ -657,7 +678,8 @@
     "component-emitter": {
       "version": "1.2.1",
       "resolved": "https://registry.npmjs.org/component-emitter/-/component-emitter-1.2.1.tgz",
-      "integrity": "sha1-E3kY1teCg/ffemt8WmPhQOaUJeY="
+      "integrity": "sha1-E3kY1teCg/ffemt8WmPhQOaUJeY=",
+      "optional": true
     },
     "component-inherit": {
       "version": "0.0.3",
@@ -765,7 +787,8 @@
     "console-control-strings": {
       "version": "1.1.0",
       "resolved": "https://registry.npmjs.org/console-control-strings/-/console-control-strings-1.1.0.tgz",
-      "integrity": "sha1-PXz0Rk22RG6mRL9LOVB/mFEAjo4="
+      "integrity": "sha1-PXz0Rk22RG6mRL9LOVB/mFEAjo4=",
+      "optional": true
     },
     "cookie": {
       "version": "0.3.1",
@@ -776,12 +799,14 @@
     "core-util-is": {
       "version": "1.0.2",
       "resolved": "https://registry.npmjs.org/core-util-is/-/core-util-is-1.0.2.tgz",
-      "integrity": "sha1-tf1UIgqivFq1eqtxQMlAdUUDwac="
+      "integrity": "sha1-tf1UIgqivFq1eqtxQMlAdUUDwac=",
+      "optional": true
     },
     "create-hash": {
       "version": "1.1.3",
       "resolved": "https://registry.npmjs.org/create-hash/-/create-hash-1.1.3.tgz",
       "integrity": "sha1-YGBCrIuSYnUPSDyt2rD1gZFy2P0=",
+      "optional": true,
       "requires": {
         "cipher-base": "1.0.4",
         "inherits": "2.0.1",
@@ -813,6 +838,7 @@
       "version": "2.6.8",
       "resolved": "https://registry.npmjs.org/debug/-/debug-2.6.8.tgz",
       "integrity": "sha1-5zFTHKLt4n0YgiJCfaF4IdaP9Pw=",
+      "optional": true,
       "requires": {
         "ms": "2.0.0"
       }
@@ -855,6 +881,7 @@
       "version": "1.4.0",
       "resolved": "https://registry.npmjs.org/end-of-stream/-/end-of-stream-1.4.0.tgz",
       "integrity": "sha1-epDYM+/abPpurA9JSduw+tOmMgY=",
+      "optional": true,
       "requires": {
         "once": "1.4.0"
       }
@@ -898,6 +925,7 @@
       "version": "2.1.1",
       "resolved": "https://registry.npmjs.org/engine.io-parser/-/engine.io-parser-2.1.1.tgz",
       "integrity": "sha1-4Ps/DgRi9/WLt3waUun1p+JuRmg=",
+      "optional": true,
       "requires": {
         "after": "0.8.2",
         "arraybuffer.slice": "0.0.6",
@@ -979,6 +1007,7 @@
       "version": "1.0.2",
       "resolved": "https://registry.npmjs.org/has-binary2/-/has-binary2-1.0.2.tgz",
       "integrity": "sha1-6D26SfC5vk0CbSc2U1DZ8D9Uvpg=",
+      "optional": true,
       "requires": {
         "isarray": "2.0.1"
       },
@@ -986,14 +1015,16 @@
         "isarray": {
           "version": "2.0.1",
           "resolved": "https://registry.npmjs.org/isarray/-/isarray-2.0.1.tgz",
-          "integrity": "sha1-o32U7ZzaLVmGXJ92/llu4fM4dB4="
+          "integrity": "sha1-o32U7ZzaLVmGXJ92/llu4fM4dB4=",
+          "optional": true
         }
       }
     },
     "has-cors": {
       "version": "1.1.0",
       "resolved": "https://registry.npmjs.org/has-cors/-/has-cors-1.1.0.tgz",
-      "integrity": "sha1-XkdHk/fqmEPRu5nCPu9J/xJv/zk="
+      "integrity": "sha1-XkdHk/fqmEPRu5nCPu9J/xJv/zk=",
+      "optional": true
     },
     "has-unicode": {
       "version": "2.0.1",
@@ -1005,6 +1036,7 @@
       "version": "2.0.2",
       "resolved": "https://registry.npmjs.org/hash-base/-/hash-base-2.0.2.tgz",
       "integrity": "sha1-ZuodhW206KVHDK32/OI65SRO8uE=",
+      "optional": true,
       "requires": {
         "inherits": "2.0.1"
       }
@@ -1038,7 +1070,8 @@
     "indexof": {
       "version": "0.0.1",
       "resolved": "https://registry.npmjs.org/indexof/-/indexof-0.0.1.tgz",
-      "integrity": "sha1-gtwzbSMrkGIXnQWrMpOmYFn9Q10="
+      "integrity": "sha1-gtwzbSMrkGIXnQWrMpOmYFn9Q10=",
+      "optional": true
     },
     "inflight": {
       "version": "1.0.6",
@@ -1076,6 +1109,7 @@
       "version": "1.0.0",
       "resolved": "https://registry.npmjs.org/is-fullwidth-code-point/-/is-fullwidth-code-point-1.0.0.tgz",
       "integrity": "sha1-754xOG8DGn8NZDr4L95QxFfvAMs=",
+      "optional": true,
       "requires": {
         "number-is-nan": "1.0.1"
       }
@@ -1083,7 +1117,8 @@
     "isarray": {
       "version": "1.0.0",
       "resolved": "https://registry.npmjs.org/isarray/-/isarray-1.0.0.tgz",
-      "integrity": "sha1-u5NdSFgsuhaMBoNJV6VKPgcSTxE="
+      "integrity": "sha1-u5NdSFgsuhaMBoNJV6VKPgcSTxE=",
+      "optional": true
     },
     "isstream": {
       "version": "0.1.2",
@@ -1168,7 +1203,8 @@
     "minimist": {
       "version": "1.2.0",
       "resolved": "https://registry.npmjs.org/minimist/-/minimist-1.2.0.tgz",
-      "integrity": "sha1-o1AIsg9BOD7sH7kU9M1d95omQoQ="
+      "integrity": "sha1-o1AIsg9BOD7sH7kU9M1d95omQoQ=",
+      "optional": true
     },
     "mkdirp": {
       "version": "0.5.1",
@@ -1403,7 +1439,8 @@
     "ms": {
       "version": "2.0.0",
       "resolved": "https://registry.npmjs.org/ms/-/ms-2.0.0.tgz",
-      "integrity": "sha1-VgiurfwAvmwpAd9fmGF4jeDVl8g="
+      "integrity": "sha1-VgiurfwAvmwpAd9fmGF4jeDVl8g=",
+      "optional": true
     },
     "n64": {
       "version": "0.0.11",
@@ -1455,7 +1492,8 @@
     "number-is-nan": {
       "version": "1.0.1",
       "resolved": "https://registry.npmjs.org/number-is-nan/-/number-is-nan-1.0.1.tgz",
-      "integrity": "sha1-CXtgK1NCKlIsGvuHkDGDNpQaAR0="
+      "integrity": "sha1-CXtgK1NCKlIsGvuHkDGDNpQaAR0=",
+      "optional": true
     },
     "object-assign": {
       "version": "4.1.1",
@@ -1505,6 +1543,7 @@
       "version": "0.0.5",
       "resolved": "https://registry.npmjs.org/parseuri/-/parseuri-0.0.5.tgz",
       "integrity": "sha1-gCBKUNTbt3m/3G6+J3jZDkvOMgo=",
+      "optional": true,
       "requires": {
         "better-assert": "1.0.2"
       }
@@ -1546,7 +1585,8 @@
     "process-nextick-args": {
       "version": "1.0.7",
       "resolved": "https://registry.npmjs.org/process-nextick-args/-/process-nextick-args-1.0.7.tgz",
-      "integrity": "sha1-FQ4gt1ZZCtP5EJPyWk8q2L/zC6M="
+      "integrity": "sha1-FQ4gt1ZZCtP5EJPyWk8q2L/zC6M=",
+      "optional": true
     },
     "proxyquire": {
       "version": "1.7.3",
@@ -1599,6 +1639,7 @@
       "version": "1.0.2",
       "resolved": "https://registry.npmjs.org/pump/-/pump-1.0.2.tgz",
       "integrity": "sha1-Oz7mUS+U8OV1U4wXmV+fFpkKXVE=",
+      "optional": true,
       "requires": {
         "end-of-stream": "1.4.0",
         "once": "1.4.0"
@@ -1620,6 +1661,7 @@
       "version": "2.3.3",
       "resolved": "https://registry.npmjs.org/readable-stream/-/readable-stream-2.3.3.tgz",
       "integrity": "sha512-m+qzzcn7KUxEmd1gMbchF+Y2eIUbieUaxkWtptyHywrX0rE8QEYqPC07Vuy4Wm32/xE16NcdBctb8S0Xe/5IeQ==",
+      "optional": true,
       "requires": {
         "core-util-is": "1.0.2",
         "inherits": "2.0.3",
@@ -1633,7 +1675,8 @@
         "inherits": {
           "version": "2.0.3",
           "resolved": "https://registry.npmjs.org/inherits/-/inherits-2.0.3.tgz",
-          "integrity": "sha1-Yzwsg+PaQqUC9SRmAiSA9CCCYd4="
+          "integrity": "sha1-Yzwsg+PaQqUC9SRmAiSA9CCCYd4=",
+          "optional": true
         }
       }
     },
@@ -1761,6 +1804,13 @@
             "async": "1.4.2",
             "combined-stream": "1.0.5",
             "mime-types": "2.1.7"
+          },
+          "dependencies": {
+            "async": {
+              "version": "1.4.2",
+              "resolved": "https://registry.npmjs.org/async/-/async-1.4.2.tgz",
+              "integrity": "sha1-bJ7csRztTw3S8tQNsNSaEJwIiqs="
+            }
           }
         },
         "har-validator": {
@@ -2037,6 +2087,7 @@
       "version": "2.0.1",
       "resolved": "https://registry.npmjs.org/ripemd160/-/ripemd160-2.0.1.tgz",
       "integrity": "sha1-D0WEKVxTo2KK9+bXmsohzlfRxuc=",
+      "optional": true,
       "requires": {
         "hash-base": "2.0.2",
         "inherits": "2.0.1"
@@ -2066,7 +2117,8 @@
         "bn.js": {
           "version": "4.11.8",
           "resolved": "https://registry.npmjs.org/bn.js/-/bn.js-4.11.8.tgz",
-          "integrity": "sha512-ItfYfPLkWHUjckQCk8xC+LwxgK8NYcXywGigJgSwOP8Y2iyWT4f2vsZnoOXTTbo+o5yXmIUJ4gn5538SO5S3gA=="
+          "integrity": "sha512-ItfYfPLkWHUjckQCk8xC+LwxgK8NYcXywGigJgSwOP8Y2iyWT4f2vsZnoOXTTbo+o5yXmIUJ4gn5538SO5S3gA==",
+          "optional": true
         },
         "elliptic": {
           "version": "6.4.0",
@@ -2095,6 +2147,7 @@
       "version": "2.4.8",
       "resolved": "https://registry.npmjs.org/sha.js/-/sha.js-2.4.8.tgz",
       "integrity": "sha1-NwaMLEdra69ALRSknGf1l5IfY08=",
+      "optional": true,
       "requires": {
         "inherits": "2.0.1"
       }
@@ -2266,6 +2319,7 @@
       "version": "3.1.2",
       "resolved": "https://registry.npmjs.org/socket.io-parser/-/socket.io-parser-3.1.2.tgz",
       "integrity": "sha1-28IoIVH8T6675Aru3Ady66YZ9/I=",
+      "optional": true,
       "requires": {
         "component-emitter": "1.2.1",
         "debug": "2.6.8",
@@ -2276,7 +2330,8 @@
         "isarray": {
           "version": "2.0.1",
           "resolved": "https://registry.npmjs.org/isarray/-/isarray-2.0.1.tgz",
-          "integrity": "sha1-o32U7ZzaLVmGXJ92/llu4fM4dB4="
+          "integrity": "sha1-o32U7ZzaLVmGXJ92/llu4fM4dB4=",
+          "optional": true
         }
       }
     },
@@ -2306,6 +2361,7 @@
       "version": "1.0.2",
       "resolved": "https://registry.npmjs.org/string-width/-/string-width-1.0.2.tgz",
       "integrity": "sha1-EYvfW4zcUaKn5w0hHgfisLmxB9M=",
+      "optional": true,
       "requires": {
         "code-point-at": "1.1.0",
         "is-fullwidth-code-point": "1.0.0",
@@ -2316,6 +2372,7 @@
       "version": "1.0.3",
       "resolved": "https://registry.npmjs.org/string_decoder/-/string_decoder-1.0.3.tgz",
       "integrity": "sha512-4AH6Z5fzNNBcH+6XDMfA/BTt87skxqJlO0lAh3Dker5zThcAxG6mKz+iGu308UKoPPQ8Dcqx/4JhujzltRa+hQ==",
+      "optional": true,
       "requires": {
         "safe-buffer": "5.1.1"
       }
@@ -2324,6 +2381,7 @@
       "version": "3.0.1",
       "resolved": "https://registry.npmjs.org/strip-ansi/-/strip-ansi-3.0.1.tgz",
       "integrity": "sha1-ajhfuIU9lS1f8F0Oiq+UJ43GPc8=",
+      "optional": true,
       "requires": {
         "ansi-regex": "2.1.1"
       }
@@ -2381,7 +2439,8 @@
     "ultron": {
       "version": "1.1.0",
       "resolved": "https://registry.npmjs.org/ultron/-/ultron-1.1.0.tgz",
-      "integrity": "sha1-sHoualQagV/Go0zNRTO67DB8qGQ="
+      "integrity": "sha1-sHoualQagV/Go0zNRTO67DB8qGQ=",
+      "optional": true
     },
     "unzip-response": {
       "version": "1.0.2",
@@ -2392,7 +2451,8 @@
     "util-deprecate": {
       "version": "1.0.2",
       "resolved": "https://registry.npmjs.org/util-deprecate/-/util-deprecate-1.0.2.tgz",
-      "integrity": "sha1-RQ1Nyfpw3nMnYvvS1KKJgUGaDM8="
+      "integrity": "sha1-RQ1Nyfpw3nMnYvvS1KKJgUGaDM8=",
+      "optional": true
     },
     "uws": {
       "version": "0.14.5",
@@ -2447,6 +2507,7 @@
       "version": "2.3.1",
       "resolved": "https://registry.npmjs.org/ws/-/ws-2.3.1.tgz",
       "integrity": "sha1-a5Sz5EfLajY/eF6vlK9jWejoHIA=",
+      "optional": true,
       "requires": {
         "safe-buffer": "5.0.1",
         "ultron": "1.1.0"
@@ -2455,7 +2516,8 @@
         "safe-buffer": {
           "version": "5.0.1",
           "resolved": "https://registry.npmjs.org/safe-buffer/-/safe-buffer-5.0.1.tgz",
-          "integrity": "sha1-0mPKVGls2KMGtcplUekt5XkY++c="
+          "integrity": "sha1-0mPKVGls2KMGtcplUekt5XkY++c=",
+          "optional": true
         }
       }
     },
@@ -2468,7 +2530,8 @@
     "xtend": {
       "version": "4.0.1",
       "resolved": "https://registry.npmjs.org/xtend/-/xtend-4.0.1.tgz",
-      "integrity": "sha1-pcbVMr5lbiPbgg77lDofBJmNY68="
+      "integrity": "sha1-pcbVMr5lbiPbgg77lDofBJmNY68=",
+      "optional": true
     },
     "yallist": {
       "version": "2.1.2",