diff --git a/package-lock.json b/package-lock.json
index de8fd2d..9c7cf8e 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -1141,6 +1141,118 @@
         "ws": "^5.1.1",
         "xhr": "^2.2.0",
         "xtend": "^4.0.1"
+      },
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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",
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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": {
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+              "resolved": "https://registry.npmjs.org/ethereumjs-vm/-/ethereumjs-vm-2.2.2.tgz",
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+                "functional-red-black-tree": "^1.0.1",
+                "merkle-patricia-tree": "^2.1.2",
+                "safe-buffer": "^5.1.1"
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+              "dependencies": {
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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",
+                    "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": "5.2.1",
+                      "resolved": "https://registry.npmjs.org/ethereumjs-util/-/ethereumjs-util-5.2.1.tgz",
+                      "integrity": "sha512-v3kT+7zdyCm1HIqWlLNrHGqHGLpGYIhjeHxQjnDXjLT2FyGJDsd3LWMYUo7pAFRrk86CR3nUJfhC81CCoJNNGQ==",
+                      "requires": {
+                        "bn.js": "^4.11.0",
+                        "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": {
+                    "bn.js": "^4.8.0",
+                    "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="
+        },
+        "pify": {
+          "version": "3.0.0",
+          "resolved": "https://registry.npmjs.org/pify/-/pify-3.0.0.tgz",
+          "integrity": "sha1-5aSs0sEB/fPZpNB/DbxNtJ3SgXY="
+        }
       }
     },
     "@sindresorhus/is": {
@@ -1190,6 +1302,14 @@
         "@babel/types": "^7.3.0"
       }
     },
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+      "version": "4.11.6",
+      "resolved": "https://registry.npmjs.org/@types/bn.js/-/bn.js-4.11.6.tgz",
+      "integrity": "sha512-pqr857jrp2kPuO9uRjZ3PwnJTjoQy+fcdxvBTvHm6dkmEL9q+hDD/2j/0ELOBPtPnS8LjCX0gI9nbl8lVkadpg==",
+      "requires": {
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+      }
+    },
     "@types/istanbul-lib-coverage": {
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@@ -1220,6 +1340,22 @@
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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/secp256k1": {
+      "version": "4.0.1",
+      "resolved": "https://registry.npmjs.org/@types/secp256k1/-/secp256k1-4.0.1.tgz",
+      "integrity": "sha512-+ZjSA8ELlOp8SlKi0YLB2tz9d5iPNEmOBd+8Rz21wTMdaXQIa9b6TEnD6l5qKOCypE7FSyPyck12qZJxSDNoog==",
+      "requires": {
+        "@types/node": "*"
+      }
+    },
     "@types/stack-utils": {
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       "resolved": "https://registry.npmjs.org/@types/stack-utils/-/stack-utils-1.0.1.tgz",
@@ -1518,13 +1654,6 @@
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       "requires": {
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-        }
       }
     },
     "async-each": {
@@ -2600,6 +2729,11 @@
         "safe-buffer": "^5.0.1"
       }
     },
+    "blakejs": {
+      "version": "1.1.0",
+      "resolved": "https://registry.npmjs.org/blakejs/-/blakejs-1.1.0.tgz",
+      "integrity": "sha1-ad+S75U6qIylGjLfarHFShVfx6U="
+    },
     "bluebird": {
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       "resolved": "https://registry.npmjs.org/bluebird/-/bluebird-3.4.7.tgz",
@@ -4062,113 +4196,6 @@
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-      "version": "github:radotzki/eth-json-rpc-middleware#8acc43df4a8c0c7f6d212af9163d379211dad4c7",
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-        "ethereumjs-tx": "^1.3.3",
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@@ -4211,6 +4238,46 @@
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+            "brorand": "^1.0.1",
+            "hash.js": "^1.0.0",
+            "hmac-drbg": "^1.0.0",
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+                "bn.js": "^4.11.0",
+                "create-hash": "^1.1.2",
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@@ -4235,38 +4302,79 @@
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+      "resolved": "https://registry.npmjs.org/ethereum-cryptography/-/ethereum-cryptography-0.1.3.tgz",
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+        "@types/pbkdf2": "^3.0.0",
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