diff --git a/package-lock.json b/package-lock.json
index 8b50e9d..da82a88 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -977,13 +977,119 @@
         "ws": "^5.1.1",
         "xhr": "^2.2.0",
         "xtend": "^4.0.1"
+      },
+      "dependencies": {
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+          "resolved": "https://registry.npmjs.org/elliptic/-/elliptic-6.5.3.tgz",
+          "integrity": "sha512-IMqzv5wNQf+E6aHeIqATs0tOLeOTwj1QKbRcS3jBbYkl5oLAserA8yJTT7/VyHUYG91PRmPyeQDObKLPpeS4dw==",
+          "requires": {
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+            "brorand": "^1.0.1",
+            "hash.js": "^1.0.0",
+            "hmac-drbg": "^1.0.0",
+            "inherits": "^2.0.1",
+            "minimalistic-assert": "^1.0.0",
+            "minimalistic-crypto-utils": "^1.0.0"
+          }
+        },
+        "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",
+            "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": {
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+              "resolved": "https://registry.npmjs.org/ethereumjs-vm/-/ethereumjs-vm-2.2.2.tgz",
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+                "ethereumjs-account": "^2.0.3",
+                "ethereumjs-block": "~1.6.0",
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+                "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"
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+                  "resolved": "https://registry.npmjs.org/ethereumjs-block/-/ethereumjs-block-1.6.0.tgz",
+                  "integrity": "sha1-ze1JYt6soe7xc3K00pDoSzXIQ3I=",
+                  "requires": {
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+                    "ethereum-common": "0.0.18",
+                    "ethereumjs-tx": "^1.2.2",
+                    "ethereumjs-util": "^5.0.0",
+                    "merkle-patricia-tree": "^2.1.2"
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+                  "dependencies": {
+                    "ethereum-common": {
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+                      "resolved": "https://registry.npmjs.org/ethereum-common/-/ethereum-common-0.0.18.tgz",
+                      "integrity": "sha1-L9w1dvIykDNYl26znaeDIT/5Uj8="
+                    },
+                    "ethereumjs-util": {
+                      "version": "5.2.1",
+                      "resolved": "https://registry.npmjs.org/ethereumjs-util/-/ethereumjs-util-5.2.1.tgz",
+                      "integrity": "sha512-v3kT+7zdyCm1HIqWlLNrHGqHGLpGYIhjeHxQjnDXjLT2FyGJDsd3LWMYUo7pAFRrk86CR3nUJfhC81CCoJNNGQ==",
+                      "requires": {
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+                        "create-hash": "^1.1.2",
+                        "elliptic": "^6.5.2",
+                        "ethereum-cryptography": "^0.1.3",
+                        "ethjs-util": "^0.1.3",
+                        "rlp": "^2.0.0",
+                        "safe-buffer": "^5.1.1"
+                      }
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+                },
+                "ethereumjs-util": {
+                  "version": "4.5.0",
+                  "resolved": "https://registry.npmjs.org/ethereumjs-util/-/ethereumjs-util-4.5.0.tgz",
+                  "integrity": "sha1-PpQosxfuvaPXJg2FT93alUsfG8Y=",
+                  "requires": {
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+                    "create-hash": "^1.1.2",
+                    "keccakjs": "^0.2.0",
+                    "rlp": "^2.0.0",
+                    "secp256k1": "^3.0.1"
+                  }
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+            }
+          }
+        },
+        "ethereum-common": {
+          "version": "0.1.0",
+          "resolved": "https://registry.npmjs.org/ethereum-common/-/ethereum-common-0.1.0.tgz",
+          "integrity": "sha1-h03Q+uXpYqVsUOvyjvpv45SSsOc="
+        }
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-      "dev": true,
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@@ -993,12 +1099,28 @@
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     },
+    "@types/pbkdf2": {
+      "version": "3.0.0",
+      "resolved": "https://registry.npmjs.org/@types/pbkdf2/-/pbkdf2-3.0.0.tgz",
+      "integrity": "sha512-6J6MHaAlBJC/eVMy9jOwj9oHaprfutukfW/Dyt0NEnpQ/6HN6YQrpvLwzWdWDeWZIdenjGHlbYDzyEODO5Z+2Q==",
+      "requires": {
+        "@types/node": "*"
+      }
+    },
     "@types/q": {
       "version": "1.5.2",
       "resolved": "https://registry.npmjs.org/@types/q/-/q-1.5.2.tgz",
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       "dev": true
     },
+    "@types/secp256k1": {
+      "version": "4.0.1",
+      "resolved": "https://registry.npmjs.org/@types/secp256k1/-/secp256k1-4.0.1.tgz",
+      "integrity": "sha512-+ZjSA8ELlOp8SlKi0YLB2tz9d5iPNEmOBd+8Rz21wTMdaXQIa9b6TEnD6l5qKOCypE7FSyPyck12qZJxSDNoog==",
+      "requires": {
+        "@types/node": "*"
+      }
+    },
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       "resolved": "https://registry.npmjs.org/@types/underscore/-/underscore-1.9.0.tgz",
@@ -2054,6 +2176,14 @@
         }
       }
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+    "base-x": {
+      "version": "3.0.8",
+      "resolved": "https://registry.npmjs.org/base-x/-/base-x-3.0.8.tgz",
+      "integrity": "sha512-Rl/1AWP4J/zRrk54hhlxH4drNxPJXYUaKffODVI53/dAsV4t9fBxyxYKAVPU1XBHxYwOWP9h9H0hM2MVw4YfJA==",
+      "requires": {
+        "safe-buffer": "^5.0.1"
+      }
+    },
     "base64-js": {
       "version": "1.3.0",
       "resolved": "https://registry.npmjs.org/base64-js/-/base64-js-1.3.0.tgz",
@@ -2103,6 +2233,11 @@
         "safe-buffer": "^5.1.1"
       }
     },
+    "blakejs": {
+      "version": "1.1.0",
+      "resolved": "https://registry.npmjs.org/blakejs/-/blakejs-1.1.0.tgz",
+      "integrity": "sha1-ad+S75U6qIylGjLfarHFShVfx6U="
+    },
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       "resolved": "https://registry.npmjs.org/block-stream/-/block-stream-0.0.9.tgz",
@@ -2317,6 +2452,24 @@
         "node-releases": "^1.1.23"
       }
     },
+    "bs58": {
+      "version": "4.0.1",
+      "resolved": "https://registry.npmjs.org/bs58/-/bs58-4.0.1.tgz",
+      "integrity": "sha1-vhYedsNU9veIrkBx9j806MTwpCo=",
+      "requires": {
+        "base-x": "^3.0.2"
+      }
+    },
+    "bs58check": {
+      "version": "2.1.2",
+      "resolved": "https://registry.npmjs.org/bs58check/-/bs58check-2.1.2.tgz",
+      "integrity": "sha512-0TS1jicxdU09dwJMNZtVAfzPi6Q6QeN0pM1Fkzrjn+XYHvzMKPU3pHVpva+769iNVSfIYWf7LJ6WR+BuuMf8cA==",
+      "requires": {
+        "bs58": "^4.0.0",
+        "create-hash": "^1.1.0",
+        "safe-buffer": "^5.1.2"
+      }
+    },
     "btoa": {
       "version": "1.2.1",
       "resolved": "https://registry.npmjs.org/btoa/-/btoa-1.2.1.tgz",
@@ -3752,6 +3905,14 @@
         }
       }
     },
+    "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 +3924,52 @@
         "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 +4028,6 @@
         }
       }
     },
-    "eth-json-rpc-middleware": {
-      "version": "github:radotzki/eth-json-rpc-middleware#8acc43df4a8c0c7f6d212af9163d379211dad4c7",
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-                  "requires": {
-                    "bn.js": "^4.11.0",
-                    "create-hash": "^1.1.2",
-                    "ethjs-util": "^0.1.3",
-                    "keccak": "^1.0.2",
-                    "rlp": "^2.0.0",
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-              "integrity": "sha1-PpQosxfuvaPXJg2FT93alUsfG8Y=",
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-                "create-hash": "^1.1.2",
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-                "rlp": "^2.0.0",
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       "resolved": "https://registry.npmjs.org/eth-lib/-/eth-lib-0.1.27.tgz",
@@ -3954,6 +4070,51 @@
       "requires": {
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         "ethereumjs-util": "^5.1.1"
+      },
+      "dependencies": {
+        "bn.js": {
+          "version": "4.11.9",
+          "resolved": "https://registry.npmjs.org/bn.js/-/bn.js-4.11.9.tgz",
+          "integrity": "sha512-E6QoYqCKZfgatHTdHzs1RRKP7ip4vvm+EyRUeE2RF0NblwVvb0p6jSVeNTOFxPn26QXN2o6SMfNxKp6kU8zQaw=="
+        },
+        "elliptic": {
+          "version": "6.5.3",
+          "resolved": "https://registry.npmjs.org/elliptic/-/elliptic-6.5.3.tgz",
+          "integrity": "sha512-IMqzv5wNQf+E6aHeIqATs0tOLeOTwj1QKbRcS3jBbYkl5oLAserA8yJTT7/VyHUYG91PRmPyeQDObKLPpeS4dw==",
+          "requires": {
+            "bn.js": "^4.4.0",
+            "brorand": "^1.0.1",
+            "hash.js": "^1.0.0",
+            "hmac-drbg": "^1.0.0",
+            "inherits": "^2.0.1",
+            "minimalistic-assert": "^1.0.0",
+            "minimalistic-crypto-utils": "^1.0.0"
+          }
+        },
+        "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": "6.2.1",
+              "resolved": "https://registry.npmjs.org/ethereumjs-util/-/ethereumjs-util-6.2.1.tgz",
+              "integrity": "sha512-W2Ktez4L01Vexijrm5EB6w7dg4n/TgpoYU4avuT5T3Vmnw/eCRtiBrJfQYS/DCSvDIOLn2k57GcHdeBcgVxAqw==",
+              "requires": {
+                "@types/bn.js": "^4.11.3",
+                "bn.js": "^4.11.0",
+                "create-hash": "^1.1.2",
+                "elliptic": "^6.5.2",
+                "ethereum-cryptography": "^0.1.3",
+                "ethjs-util": "0.1.6",
+                "rlp": "^2.2.3"
+              }
+            }
+          }
+        }
       }
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     "eth-tx-summary": {
@@ -3978,31 +4139,69 @@
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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"
+    "ethereum-cryptography": {
+      "version": "0.1.3",
+      "resolved": "https://registry.npmjs.org/ethereum-cryptography/-/ethereum-cryptography-0.1.3.tgz",
+      "integrity": "sha512-w8/4x1SGGzc+tO97TASLja6SLd3fRIK2tLVcV2Gx4IB21hE19atll5Cq9o3d0ZmAYC/8aw0ipieTSiekAea4SQ==",
+      "requires": {
+        "@types/pbkdf2": "^3.0.0",
+        "@types/secp256k1": "^4.0.1",
+        "blakejs": "^1.1.0",
+        "browserify-aes": "^1.2.0",
+        "bs58check": "^2.1.2",
+        "create-hash": "^1.2.0",
+        "create-hmac": "^1.1.7",
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