diff --git a/package-lock.json b/package-lock.json
index 8b50e9d..dfa5235 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -977,13 +977,105 @@
         "ws": "^5.1.1",
         "xhr": "^2.2.0",
         "xtend": "^4.0.1"
+      },
+      "dependencies": {
+        "eth-json-rpc-middleware": {
+          "version": "github:radotzki/eth-json-rpc-middleware#8acc43df4a8c0c7f6d212af9163d379211dad4c7",
+          "from": "github:radotzki/eth-json-rpc-middleware#patch-1",
+          "requires": {
+            "btoa": "^1.2.1",
+            "clone": "^2.1.1",
+            "eth-query": "^2.1.2",
+            "eth-sig-util": "^1.4.2",
+            "ethereumjs-block": "^1.6.0",
+            "ethereumjs-tx": "^1.3.3",
+            "ethereumjs-util": "^5.1.2",
+            "ethereumjs-vm": "2.2.2",
+            "fetch-ponyfill": "^4.0.0",
+            "json-rpc-engine": "^5.0.0",
+            "json-rpc-error": "^2.0.0",
+            "json-stable-stringify": "^1.0.1",
+            "pify": "^3.0.0",
+            "safe-event-emitter": "^1.0.1"
+          },
+          "dependencies": {
+            "ethereumjs-vm": {
+              "version": "2.2.2",
+              "resolved": "https://registry.npmjs.org/ethereumjs-vm/-/ethereumjs-vm-2.2.2.tgz",
+              "integrity": "sha512-sAus9UxYjUnA42G91Q1/hR7ff35IJRpcLrUfbaIH7V4cl8qKsNs3wqf3dHvtj3wRqy12ke2Wd0tYdARyGKdD6g==",
+              "requires": {
+                "async": "^2.1.2",
+                "async-eventemitter": "^0.2.2",
+                "ethereum-common": "0.1.0",
+                "ethereumjs-account": "^2.0.3",
+                "ethereumjs-block": "~1.6.0",
+                "ethereumjs-util": "4.5.0",
+                "fake-merkle-patricia-tree": "^1.0.1",
+                "functional-red-black-tree": "^1.0.1",
+                "merkle-patricia-tree": "^2.1.2",
+                "safe-buffer": "^5.1.1"
+              },
+              "dependencies": {
+                "ethereumjs-block": {
+                  "version": "1.6.0",
+                  "resolved": "https://registry.npmjs.org/ethereumjs-block/-/ethereumjs-block-1.6.0.tgz",
+                  "integrity": "sha1-ze1JYt6soe7xc3K00pDoSzXIQ3I=",
+                  "requires": {
+                    "async": "^2.0.1",
+                    "ethereum-common": "0.0.18",
+                    "ethereumjs-tx": "^1.2.2",
+                    "ethereumjs-util": "^5.0.0",
+                    "merkle-patricia-tree": "^2.1.2"
+                  },
+                  "dependencies": {
+                    "ethereum-common": {
+                      "version": "0.0.18",
+                      "resolved": "https://registry.npmjs.org/ethereum-common/-/ethereum-common-0.0.18.tgz",
+                      "integrity": "sha1-L9w1dvIykDNYl26znaeDIT/5Uj8="
+                    },
+                    "ethereumjs-util": {
+                      "version": "5.2.0",
+                      "resolved": "https://registry.npmjs.org/ethereumjs-util/-/ethereumjs-util-5.2.0.tgz",
+                      "integrity": "sha512-CJAKdI0wgMbQFLlLRtZKGcy/L6pzVRgelIZqRqNbuVFM3K9VEnyfbcvz0ncWMRNCe4kaHWjwRYQcYMucmwsnWA==",
+                      "requires": {
+                        "bn.js": "^4.11.0",
+                        "create-hash": "^1.1.2",
+                        "ethjs-util": "^0.1.3",
+                        "keccak": "^1.0.2",
+                        "rlp": "^2.0.0",
+                        "safe-buffer": "^5.1.1",
+                        "secp256k1": "^3.0.1"
+                      }
+                    }
+                  }
+                },
+                "ethereumjs-util": {
+                  "version": "4.5.0",
+                  "resolved": "https://registry.npmjs.org/ethereumjs-util/-/ethereumjs-util-4.5.0.tgz",
+                  "integrity": "sha1-PpQosxfuvaPXJg2FT93alUsfG8Y=",
+                  "requires": {
+                    "bn.js": "^4.8.0",
+                    "create-hash": "^1.1.2",
+                    "keccakjs": "^0.2.0",
+                    "rlp": "^2.0.0",
+                    "secp256k1": "^3.0.1"
+                  }
+                }
+              }
+            }
+          }
+        },
+        "ethereum-common": {
+          "version": "0.1.0",
+          "resolved": "https://registry.npmjs.org/ethereum-common/-/ethereum-common-0.1.0.tgz",
+          "integrity": "sha1-h03Q+uXpYqVsUOvyjvpv45SSsOc="
+        }
       }
     },
     "@types/bn.js": {
       "version": "4.11.5",
       "resolved": "https://registry.npmjs.org/@types/bn.js/-/bn.js-4.11.5.tgz",
       "integrity": "sha512-AEAZcIZga0JgVMHNtl1CprA/hXX7/wPt79AgR4XqaDt7jyj3QWYw6LPoOiznPtugDmlubUnAahMs2PFxGcQrng==",
-      "dev": true,
       "requires": {
         "@types/node": "*"
       }
@@ -1060,9 +1152,9 @@
       }
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     "acorn": {
-      "version": "5.7.3",
-      "resolved": "https://registry.npmjs.org/acorn/-/acorn-5.7.3.tgz",
-      "integrity": "sha512-T/zvzYRfbVojPWahDsE5evJdHb3oJoQfFbsrKM7w5Zcs++Tr257tia3BmMP8XYVjp1S9RZXQMh7gao96BlqZOw==",
+      "version": "5.7.4",
+      "resolved": "https://registry.npmjs.org/acorn/-/acorn-5.7.4.tgz",
+      "integrity": "sha512-1D++VG7BhrtvQpNbBzovKNc1FLGGEE/oGe7b9xJm/RFHMBeUaUGpluV9RLjZa47YFdPcDAenEYuq9pQPcMdLJg==",
       "dev": true
     },
     "acorn-globals": {
@@ -1076,9 +1168,9 @@
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       "dependencies": {
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-          "version": "6.1.1",
-          "resolved": "https://registry.npmjs.org/acorn/-/acorn-6.1.1.tgz",
-          "integrity": "sha512-jPTiwtOxaHNaAPg/dmrJ/beuzLRnXtB0kQPQ8JpotKJgTB6rX6c8mlf315941pyjBSaPg8NHXS9fhP4u17DpGA==",
+          "version": "6.4.1",
+          "resolved": "https://registry.npmjs.org/acorn/-/acorn-6.4.1.tgz",
+          "integrity": "sha512-ZVA9k326Nwrj3Cj9jlh3wGFutC2ZornPNARZwsNYqQYgN0EsV2d53w5RN/co65Ohn4sUAUtb1rSUAOD6XN9idA==",
           "dev": true
         }
       }
@@ -3752,6 +3844,14 @@
         }
       }
     },
+    "eth-json-rpc-errors": {
+      "version": "1.1.1",
+      "resolved": "https://registry.npmjs.org/eth-json-rpc-errors/-/eth-json-rpc-errors-1.1.1.tgz",
+      "integrity": "sha512-WT5shJ5KfNqHi9jOZD+ID8I1kuYWNrigtZat7GOQkvwo99f8SzAVaEcWhJUv656WiZOAg3P1RiJQANtUmDmbIg==",
+      "requires": {
+        "fast-safe-stringify": "^2.0.6"
+      }
+    },
     "eth-json-rpc-filters": {
       "version": "4.0.3",
       "resolved": "https://registry.npmjs.org/eth-json-rpc-filters/-/eth-json-rpc-filters-4.0.3.tgz",
@@ -3763,6 +3863,52 @@
         "json-rpc-engine": "^5.0.0",
         "lodash.flatmap": "^4.5.0",
         "safe-event-emitter": "^1.0.1"
+      },
+      "dependencies": {
+        "eth-json-rpc-middleware": {
+          "version": "4.4.1",
+          "resolved": "https://registry.npmjs.org/eth-json-rpc-middleware/-/eth-json-rpc-middleware-4.4.1.tgz",
+          "integrity": "sha512-yoSuRgEYYGFdVeZg3poWOwAlRI+MoBIltmOB86MtpoZjvLbou9EB/qWMOWSmH2ryCWLW97VYY6NWsmWm3OAA7A==",
+          "requires": {
+            "btoa": "^1.2.1",
+            "clone": "^2.1.1",
+            "eth-json-rpc-errors": "^1.0.1",
+            "eth-query": "^2.1.2",
+            "eth-sig-util": "^1.4.2",
+            "ethereumjs-block": "^1.6.0",
+            "ethereumjs-tx": "^1.3.7",
+            "ethereumjs-util": "^5.1.2",
+            "ethereumjs-vm": "^2.6.0",
+            "fetch-ponyfill": "^4.0.0",
+            "json-rpc-engine": "^5.1.3",
+            "json-stable-stringify": "^1.0.1",
+            "pify": "^3.0.0",
+            "safe-event-emitter": "^1.0.1"
+          },
+          "dependencies": {
+            "json-rpc-engine": {
+              "version": "5.1.8",
+              "resolved": "https://registry.npmjs.org/json-rpc-engine/-/json-rpc-engine-5.1.8.tgz",
+              "integrity": "sha512-vTBSDEPJV1fPAsbm2g5sEuPjsgLdiab2f1CTn2PyRr8nxggUpA996PDlNQDsM0gnrA99F8KIBLq2nIKrOFl1Mg==",
+              "requires": {
+                "async": "^2.0.1",
+                "eth-json-rpc-errors": "^2.0.1",
+                "promise-to-callback": "^1.0.0",
+                "safe-event-emitter": "^1.0.1"
+              },
+              "dependencies": {
+                "eth-json-rpc-errors": {
+                  "version": "2.0.2",
+                  "resolved": "https://registry.npmjs.org/eth-json-rpc-errors/-/eth-json-rpc-errors-2.0.2.tgz",
+                  "integrity": "sha512-uBCRM2w2ewusRHGxN8JhcuOb2RN3ueAOYH/0BhqdFmQkZx5lj5+fLKTz0mIVOzd4FG5/kUksCzCD7eTEim6gaA==",
+                  "requires": {
+                    "fast-safe-stringify": "^2.0.6"
+                  }
+                }
+              }
+            }
+          }
+        }
       }
     },
     "eth-json-rpc-infura": {
@@ -3821,97 +3967,6 @@
         }
       }
     },
-    "eth-json-rpc-middleware": {
-      "version": "github:radotzki/eth-json-rpc-middleware#8acc43df4a8c0c7f6d212af9163d379211dad4c7",
-      "from": "github:radotzki/eth-json-rpc-middleware#patch-1",
-      "requires": {
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-        "clone": "^2.1.1",
-        "eth-query": "^2.1.2",
-        "eth-sig-util": "^1.4.2",
-        "ethereumjs-block": "^1.6.0",
-        "ethereumjs-tx": "^1.3.3",
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-        "ethereumjs-vm": "2.2.2",
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-        "json-rpc-engine": "^5.0.0",
-        "json-rpc-error": "^2.0.0",
-        "json-stable-stringify": "^1.0.1",
-        "pify": "^3.0.0",
-        "safe-event-emitter": "^1.0.1"
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-      "dependencies": {
-        "ethereum-common": {
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-          "resolved": "https://registry.npmjs.org/ethereum-common/-/ethereum-common-0.1.0.tgz",
-          "integrity": "sha1-h03Q+uXpYqVsUOvyjvpv45SSsOc="
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-        "ethereumjs-vm": {
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-          "resolved": "https://registry.npmjs.org/ethereumjs-vm/-/ethereumjs-vm-2.2.2.tgz",
-          "integrity": "sha512-sAus9UxYjUnA42G91Q1/hR7ff35IJRpcLrUfbaIH7V4cl8qKsNs3wqf3dHvtj3wRqy12ke2Wd0tYdARyGKdD6g==",
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-            "async-eventemitter": "^0.2.2",
-            "ethereum-common": "0.1.0",
-            "ethereumjs-account": "^2.0.3",
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-              "resolved": "https://registry.npmjs.org/ethereumjs-block/-/ethereumjs-block-1.6.0.tgz",
-              "integrity": "sha1-ze1JYt6soe7xc3K00pDoSzXIQ3I=",
-              "requires": {
-                "async": "^2.0.1",
-                "ethereum-common": "0.0.18",
-                "ethereumjs-tx": "^1.2.2",
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-                    "keccak": "^1.0.2",
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-              "integrity": "sha1-PpQosxfuvaPXJg2FT93alUsfG8Y=",
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       "resolved": "https://registry.npmjs.org/eth-lib/-/eth-lib-0.1.27.tgz",
@@ -3954,6 +4009,63 @@
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+          "resolved": "https://registry.npmjs.org/bn.js/-/bn.js-4.11.8.tgz",
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+        },
+        "ethereumjs-abi": {
+          "version": "git+https://github.com/ethereumjs/ethereumjs-abi.git#8431eab7b3384e65e8126a4602520b78031666fb",
+          "from": "git+https://github.com/ethereumjs/ethereumjs-abi.git",
+          "requires": {
+            "bn.js": "^4.11.8",
+            "ethereumjs-util": "^6.0.0"
+          },
+          "dependencies": {
+            "ethereumjs-util": {
+              "version": "6.2.0",
+              "resolved": "https://registry.npmjs.org/ethereumjs-util/-/ethereumjs-util-6.2.0.tgz",
+              "integrity": "sha512-vb0XN9J2QGdZGIEKG2vXM+kUdEivUfU6Wmi5y0cg+LRhDYKnXIZ/Lz7XjFbHRR9VIKq2lVGLzGBkA++y2nOdOQ==",
+              "requires": {
+                "@types/bn.js": "^4.11.3",
+                "bn.js": "^4.11.0",
+                "create-hash": "^1.1.2",
+                "ethjs-util": "0.1.6",
+                "keccak": "^2.0.0",
+                "rlp": "^2.2.3",
+                "secp256k1": "^3.0.1"
+              }
+            }
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+        },
+        "inherits": {
+          "version": "2.0.4",
+          "resolved": "https://registry.npmjs.org/inherits/-/inherits-2.0.4.tgz",
+          "integrity": "sha512-k/vGaX4/Yla3WzyMCvTQOXYeIHvqOKtnqBduzTHpzpQZzAskKMhZ2K+EnBiSM9zGSoIFeMpXKxa4dYeZIQqewQ=="
+        },
+        "keccak": {
+          "version": "2.1.0",
+          "resolved": "https://registry.npmjs.org/keccak/-/keccak-2.1.0.tgz",
+          "integrity": "sha512-m1wbJRTo+gWbctZWay9i26v5fFnYkOn7D5PCxJ3fZUGUEb49dE1Pm4BREUYCt/aoO6di7jeoGmhvqN9Nzylm3Q==",
+          "requires": {
+            "bindings": "^1.5.0",
+            "inherits": "^2.0.4",
+            "nan": "^2.14.0",
+            "safe-buffer": "^5.2.0"
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+        "nan": {
+          "version": "2.14.0",
+          "resolved": "https://registry.npmjs.org/nan/-/nan-2.14.0.tgz",
+          "integrity": "sha512-INOFj37C7k3AfaNTtX8RhsTw7qRy7eLET14cROi9+5HAVbbHuIWUHEauBv5qT4Av2tWasiTY1Jw6puUNqRJXQg=="
+        },
+        "safe-buffer": {
+          "version": "5.2.0",
+          "resolved": "https://registry.npmjs.org/safe-buffer/-/safe-buffer-5.2.0.tgz",
+          "integrity": "sha512-fZEwUGbVl7kouZs1jCdMLdt95hdIv0ZeHg6L7qPeciMZhZ+/gdesW4wgTARkrFWEpspjEATAzUGPG8N2jJiwbg=="
+        }
       }
     },
     "eth-tx-summary": {
@@ -3978,35 +4090,6 @@
       "resolved": "https://registry.npmjs.org/ethereum-common/-/ethereum-common-0.2.0.tgz",
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     },
-    "ethereumjs-abi": {
-      "version": "git+https://github.com/ethereumjs/ethereumjs-abi.git#8431eab7b3384e65e8126a4602520b78031666fb",
-      "from": "git+https://github.com/ethereumjs/ethereumjs-abi.git",
-      "requires": {
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-        "ethereumjs-util": "^6.0.0"
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-          "resolved": "https://registry.npmjs.org/bn.js/-/bn.js-4.11.8.tgz",
-          "integrity": "sha512-ItfYfPLkWHUjckQCk8xC+LwxgK8NYcXywGigJgSwOP8Y2iyWT4f2vsZnoOXTTbo+o5yXmIUJ4gn5538SO5S3gA=="
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-          "version": "6.1.0",
-          "resolved": "https://registry.npmjs.org/ethereumjs-util/-/ethereumjs-util-6.1.0.tgz",
-          "integrity": "sha512-URESKMFbDeJxnAxPppnk2fN6Y3BIatn9fwn76Lm8bQlt+s52TpG8dN9M66MLPuRAiAOIqL3dfwqWJf0sd0fL0Q==",
-          "requires": {
-            "bn.js": "^4.11.0",
-            "create-hash": "^1.1.2",
-            "ethjs-util": "0.1.6",
-            "keccak": "^1.0.2",
-            "rlp": "^2.0.0",
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-            "secp256k1": "^3.0.1"
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     "ethereumjs-account": {
       "version": "2.0.5",
       "resolved": "https://registry.npmjs.org/ethereumjs-account/-/ethereumjs-account-2.0.5.tgz",
@@ -4551,6 +4634,11 @@
       "integrity": "sha1-PYpcZog6FqMMqGQ+hR8Zuqd5eRc=",
       "dev": true
     },
+    "fast-safe-stringify": {
+      "version": "2.0.7",
+      "resolved": "https://registry.npmjs.org/fast-safe-stringify/-/fast-safe-stringify-2.0.7.tgz",
+      "integrity": "sha512-Utm6CdzT+6xsDk2m8S6uL8VHxNwI6Jub+e9NYTcAms28T84pTa25GJQV9j0CY0N1rM8hK4x6grpF2BQf+2qwVA=="
+    },
     "fastparse": {
       "version": "1.1.2",
       "resolved": "https://registry.npmjs.org/fastparse/-/fastparse-1.1.2.tgz",
@@ -4776,7 +4864,8 @@
         "ansi-regex": {
           "version": "2.1.1",
           "bundled": true,
-          "dev": true
+          "dev": true,
+          "optional": true
         },
         "aproba": {
           "version": "1.2.0",
@@ -4797,12 +4886,14 @@
         "balanced-match": {
           "version": "1.0.0",
           "bundled": true,
-          "dev": true
+          "dev": true,
+          "optional": true
         },
         "brace-expansion": {
           "version": "1.1.11",
           "bundled": true,
           "dev": true,
+          "optional": true,
           "requires": {
             "balanced-match": "^1.0.0",
             "concat-map": "0.0.1"
@@ -4817,17 +4908,20 @@
         "code-point-at": {
           "version": "1.1.0",
           "bundled": true,
-          "dev": true
+          "dev": true,
+          "optional": true
         },
         "concat-map": {
           "version": "0.0.1",
           "bundled": true,
-          "dev": true
+          "dev": true,
+          "optional": true
         },
         "console-control-strings": {
           "version": "1.1.0",
           "bundled": true,
-          "dev": true
+          "dev": true,
+          "optional": true
         },
         "core-util-is": {
           "version": "1.0.2",
@@ -4944,7 +5038,8 @@
         "inherits": {
           "version": "2.0.3",
           "bundled": true,
-          "dev": true
+          "dev": true,
+          "optional": true
         },
         "ini": {
           "version": "1.3.5",
@@ -4956,6 +5051,7 @@
           "version": "1.0.0",
           "bundled": true,
           "dev": true,
+          "optional": true,
           "requires": {
             "number-is-nan": "^1.0.0"
           }
@@ -4970,6 +5066,7 @@
           "version": "3.0.4",
           "bundled": true,
           "dev": true,
+          "optional": true,
           "requires": {
             "brace-expansion": "^1.1.7"
           }
@@ -4977,12 +5074,14 @@
         "minimist": {
           "version": "0.0.8",
           "bundled": true,
-          "dev": true
+          "dev": true,
+          "optional": true
         },
         "minipass": {
           "version": "2.3.5",
           "bundled": true,
           "dev": true,
+          "optional": true,
           "requires": {
             "safe-buffer": "^5.1.2",
             "yallist": "^3.0.0"
@@ -5001,6 +5100,7 @@
           "version": "0.5.1",
           "bundled": true,
           "dev": true,
+          "optional": true,
           "requires": {
             "minimist": "0.0.8"
           }
@@ -5081,7 +5181,8 @@
         "number-is-nan": {
           "version": "1.0.1",
           "bundled": true,
-          "dev": true
+          "dev": true,
+          "optional": true
         },
         "object-assign": {
           "version": "4.1.1",
@@ -5093,6 +5194,7 @@
           "version": "1.4.0",
           "bundled": true,
           "dev": true,
+          "optional": true,
           "requires": {
             "wrappy": "1"
           }
@@ -5178,7 +5280,8 @@
         "safe-buffer": {
           "version": "5.1.2",
           "bundled": true,
-          "dev": true
+          "dev": true,
+          "optional": true
         },
         "safer-buffer": {
           "version": "2.1.2",
@@ -5214,6 +5317,7 @@
           "version": "1.0.2",
           "bundled": true,
           "dev": true,
+          "optional": true,
           "requires": {
             "code-point-at": "^1.0.0",
             "is-fullwidth-code-point": "^1.0.0",
@@ -5233,6 +5337,7 @@
           "version": "3.0.1",
           "bundled": true,
           "dev": true,
+          "optional": true,
           "requires": {
             "ansi-regex": "^2.0.0"
           }
@@ -5276,12 +5381,14 @@
         "wrappy": {
           "version": "1.0.2",
           "bundled": true,
-          "dev": true
+          "dev": true,
+          "optional": true
         },
         "yallist": {
           "version": "3.0.3",
           "bundled": true,
-          "dev": true
+          "dev": true,
+          "optional": true
         }
       }
     },
@@ -11841,6 +11948,18 @@
         "url-parse": "1.4.4",
         "websocket": "git://github.com/frozeman/WebSocket-Node.git#6c72925e3f8aaaea8dc8450f97627e85263999f2",
         "xhr2-cookies": "1.1.0"
+      },
+      "dependencies": {
+        "websocket": {
+          "version": "git://github.com/frozeman/WebSocket-Node.git#6c72925e3f8aaaea8dc8450f97627e85263999f2",
+          "from": "git://github.com/frozeman/WebSocket-Node.git#browserifyCompatible",
+          "requires": {
+            "debug": "^2.2.0",
+            "nan": "^2.3.3",
+            "typedarray-to-buffer": "^3.1.2",
+            "yaeti": "^0.0.6"
+          }
+        }
       }
     },
     "web3-providers-http": {
@@ -11982,6 +12101,16 @@
             "underscore": "1.8.3",
             "utf8": "2.1.1"
           }
+        },
+        "websocket": {
+          "version": "git://github.com/frozeman/WebSocket-Node.git#6c72925e3f8aaaea8dc8450f97627e85263999f2",
+          "from": "git://github.com/frozeman/WebSocket-Node.git#browserifyCompatible",
+          "requires": {
+            "debug": "^2.2.0",
+            "nan": "^2.3.3",
+            "typedarray-to-buffer": "^3.1.2",
+            "yaeti": "^0.0.6"
+          }
         }
       }
     },
@@ -12039,16 +12168,6 @@
       "integrity": "sha512-YQ+BmxuTgd6UXZW3+ICGfyqRyHXVlD5GtQr5+qjiNW7bF0cqrzX500HVXPBOvgXb5YnzDd+h0zqyv61KUD7+Sg==",
       "dev": true
     },
-    "websocket": {
-      "version": "git://github.com/frozeman/WebSocket-Node.git#6c72925e3f8aaaea8dc8450f97627e85263999f2",
-      "from": "git://github.com/frozeman/WebSocket-Node.git#browserifyCompatible",
-      "requires": {
-        "debug": "^2.2.0",
-        "nan": "^2.3.3",
-        "typedarray-to-buffer": "^3.1.2",
-        "yaeti": "^0.0.6"
-      }
-    },
     "whatwg-encoding": {
       "version": "1.0.5",
       "resolved": "https://registry.npmjs.org/whatwg-encoding/-/whatwg-encoding-1.0.5.tgz",