diff --git a/package-lock.json b/package-lock.json
index f5a9f31..122e810 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -34,6 +34,93 @@
         "ethereumjs-wallet": "^0.6.3",
         "web3": "1.2.1",
         "web3-provider-engine": "git+https://github.com/trufflesuite/provider-engine.git#3538c60bc4836b73ccae1ac3f64c8fed8ef19c1a"
+      },
+      "dependencies": {
+        "elliptic": {
+          "version": "6.5.4",
+          "resolved": "https://registry.npmjs.org/elliptic/-/elliptic-6.5.4.tgz",
+          "integrity": "sha512-iLhC6ULemrljPZb+QutR5TQGB+pdW6KGD5RSegS+8sorOZT+rdQFbsQFJgvN3eRqNALqJer4oQ16YvJHlU8hzQ==",
+          "dev": true,
+          "requires": {
+            "bn.js": "^4.11.9",
+            "brorand": "^1.1.0",
+            "hash.js": "^1.0.0",
+            "hmac-drbg": "^1.0.1",
+            "inherits": "^2.0.4",
+            "minimalistic-assert": "^1.0.1",
+            "minimalistic-crypto-utils": "^1.0.1"
+          },
+          "dependencies": {
+            "bn.js": {
+              "version": "4.12.0",
+              "resolved": "https://registry.npmjs.org/bn.js/-/bn.js-4.12.0.tgz",
+              "integrity": "sha512-c98Bf3tPniI+scsdk237ku1Dc3ujXQTSgyiPUDEOe7tRkhrqridvh8klBv0HCEso1OLOYcHuCv/cS6DNxKH+ZA==",
+              "dev": true
+            }
+          }
+        },
+        "web3-provider-engine": {
+          "version": "git+https://github.com/trufflesuite/provider-engine.git#3538c60bc4836b73ccae1ac3f64c8fed8ef19c1a",
+          "from": "git+https://github.com/trufflesuite/provider-engine.git#web3-one",
+          "dev": true,
+          "requires": {
+            "async": "^2.5.0",
+            "backoff": "^2.5.0",
+            "clone": "^2.0.0",
+            "cross-fetch": "^2.1.0",
+            "eth-block-tracker": "^3.0.0",
+            "eth-json-rpc-infura": "^3.1.0",
+            "eth-sig-util": "^1.4.2",
+            "ethereumjs-block": "^1.2.2",
+            "ethereumjs-tx": "^1.2.0",
+            "ethereumjs-util": "^5.1.5",
+            "ethereumjs-vm": "^2.3.4",
+            "json-rpc-error": "^2.0.0",
+            "json-stable-stringify": "^1.0.1",
+            "promise-to-callback": "^1.0.0",
+            "readable-stream": "^2.2.9",
+            "request": "^2.85.0",
+            "semaphore": "^1.0.3",
+            "ws": "^5.1.1",
+            "xhr": "^2.2.0",
+            "xtend": "^4.0.1"
+          },
+          "dependencies": {
+            "ethereumjs-util": {
+              "version": "5.2.1",
+              "resolved": "https://registry.npmjs.org/ethereumjs-util/-/ethereumjs-util-5.2.1.tgz",
+              "integrity": "sha512-v3kT+7zdyCm1HIqWlLNrHGqHGLpGYIhjeHxQjnDXjLT2FyGJDsd3LWMYUo7pAFRrk86CR3nUJfhC81CCoJNNGQ==",
+              "dev": true,
+              "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"
+              }
+            }
+          }
+        },
+        "ws": {
+          "version": "5.2.3",
+          "resolved": "https://registry.npmjs.org/ws/-/ws-5.2.3.tgz",
+          "integrity": "sha512-jZArVERrMsKUatIdnLzqvcfydI85dvd/Fp1u/VOpfdDWQ4c9qWXe+VIeAbQ5FrDwciAkr+lzofXLz3Kuf26AOA==",
+          "dev": true,
+          "requires": {
+            "async-limiter": "~1.0.0"
+          }
+        }
+      }
+    },
+    "@types/bn.js": {
+      "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==",
+      "dev": true,
+      "requires": {
+        "@types/node": "*"
       }
     },
     "@types/node": {
@@ -42,6 +129,24 @@
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       "dev": true
     },
+    "@types/pbkdf2": {
+      "version": "3.1.0",
+      "resolved": "https://registry.npmjs.org/@types/pbkdf2/-/pbkdf2-3.1.0.tgz",
+      "integrity": "sha512-Cf63Rv7jCQ0LaL8tNXmEyqTHuIJxRdlS5vMh1mj5voN4+QFhVZnlZruezqpWYDiJ8UTzhP0VmeLXCmBk66YrMQ==",
+      "dev": true,
+      "requires": {
+        "@types/node": "*"
+      }
+    },
+    "@types/secp256k1": {
+      "version": "4.0.3",
+      "resolved": "https://registry.npmjs.org/@types/secp256k1/-/secp256k1-4.0.3.tgz",
+      "integrity": "sha512-Da66lEIFeIz9ltsdMZcpQvmrmmoqrfju8pm1BH8WbYjZSwUgCwXLb9C+9XYogwBITnbsSaMdVPb2ekf7TV+03w==",
+      "dev": true,
+      "requires": {
+        "@types/node": "*"
+      }
+    },
     "abstract-leveldown": {
       "version": "2.6.3",
       "resolved": "https://registry.npmjs.org/abstract-leveldown/-/abstract-leveldown-2.6.3.tgz",
@@ -68,15 +173,23 @@
       "dev": true
     },
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-      "version": "6.10.2",
-      "resolved": "https://registry.npmjs.org/ajv/-/ajv-6.10.2.tgz",
-      "integrity": "sha512-TXtUUEYHuaTEbLZWIKUr5pmBuhDLy+8KYtPYdcV8qC+pOZL+NKqYwvWSRrVXHn+ZmRRAu8vJTAznH7Oag6RVRw==",
+      "version": "6.12.6",
+      "resolved": "https://registry.npmjs.org/ajv/-/ajv-6.12.6.tgz",
+      "integrity": "sha512-j3fVLgvTo527anyYyJOGTYJbG+vnnQYvE0m5mmkc1TK+nxAppkCLMIL0aZ4dblVCNoGShhm+kzE4ZUykBoMg4g==",
       "dev": true,
       "requires": {
-        "fast-deep-equal": "^2.0.1",
+        "fast-deep-equal": "^3.1.1",
         "fast-json-stable-stringify": "^2.0.0",
         "json-schema-traverse": "^0.4.1",
         "uri-js": "^4.2.2"
+      },
+      "dependencies": {
+        "fast-deep-equal": {
+          "version": "3.1.3",
+          "resolved": "https://registry.npmjs.org/fast-deep-equal/-/fast-deep-equal-3.1.3.tgz",
+          "integrity": "sha512-f3qQ9oQy9j2AhBe/H9VC91wLmKBCCU/gDOnKNAYG5hswO7BLKj09Hc5HYNz9cGI++xlpDCIgDaitVs03ATR84Q==",
+          "dev": true
+        }
       }
     },
     "ansi-regex": {
@@ -897,6 +1010,12 @@
         "safe-buffer": "^5.1.1"
       }
     },
+    "blakejs": {
+      "version": "1.1.1",
+      "resolved": "https://registry.npmjs.org/blakejs/-/blakejs-1.1.1.tgz",
+      "integrity": "sha512-bLG6PHOCZJKNshTjGRBvET0vTciwQE6zFKOKKXPDJfwFBd4Ac0yBfPZqcGvGJap50l7ktvlpFqc2jGVaUgbJgg==",
+      "dev": true
+    },
     "bluebird": {
       "version": "3.7.1",
       "resolved": "https://registry.npmjs.org/bluebird/-/bluebird-3.7.1.tgz",
@@ -1956,6 +2075,55 @@
         "ethereumjs-util": "^5.1.1"
       },
       "dependencies": {
+        "elliptic": {
+          "version": "6.5.4",
+          "resolved": "https://registry.npmjs.org/elliptic/-/elliptic-6.5.4.tgz",
+          "integrity": "sha512-iLhC6ULemrljPZb+QutR5TQGB+pdW6KGD5RSegS+8sorOZT+rdQFbsQFJgvN3eRqNALqJer4oQ16YvJHlU8hzQ==",
+          "dev": true,
+          "requires": {
+            "bn.js": "^4.11.9",
+            "brorand": "^1.1.0",
+            "hash.js": "^1.0.0",
+            "hmac-drbg": "^1.0.1",
+            "inherits": "^2.0.4",
+            "minimalistic-assert": "^1.0.1",
+            "minimalistic-crypto-utils": "^1.0.1"
+          },
+          "dependencies": {
+            "bn.js": {
+              "version": "4.12.0",
+              "resolved": "https://registry.npmjs.org/bn.js/-/bn.js-4.12.0.tgz",
+              "integrity": "sha512-c98Bf3tPniI+scsdk237ku1Dc3ujXQTSgyiPUDEOe7tRkhrqridvh8klBv0HCEso1OLOYcHuCv/cS6DNxKH+ZA==",
+              "dev": true
+            }
+          }
+        },
+        "ethereumjs-abi": {
+          "version": "git+https://github.com/ethereumjs/ethereumjs-abi.git#1cfbb13862f90f0b391d8a699544d5fe4dfb8c7b",
+          "from": "git+https://github.com/ethereumjs/ethereumjs-abi.git",
+          "dev": true,
+          "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==",
+              "dev": true,
+              "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"
+              }
+            }
+          }
+        },
         "ethereumjs-util": {
           "version": "5.2.0",
           "resolved": "https://registry.npmjs.org/ethereumjs-util/-/ethereumjs-util-5.2.0.tgz",
@@ -2014,21 +2182,97 @@
       "integrity": "sha1-L9w1dvIykDNYl26znaeDIT/5Uj8=",
       "dev": true
     },
+    "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==",
+      "dev": true,
+      "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",
+        "hash.js": "^1.1.7",
+        "keccak": "^3.0.0",
+        "pbkdf2": "^3.0.17",
+        "randombytes": "^2.1.0",
+        "safe-buffer": "^5.1.2",
+        "scrypt-js": "^3.0.0",
+        "secp256k1": "^4.0.1",
+        "setimmediate": "^1.0.5"
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+          "resolved": "https://registry.npmjs.org/bn.js/-/bn.js-4.12.0.tgz",
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+        },
+        "elliptic": {
+          "version": "6.5.4",
+          "resolved": "https://registry.npmjs.org/elliptic/-/elliptic-6.5.4.tgz",
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+          "dev": true,
+          "requires": {
+            "bn.js": "^4.11.9",
+            "brorand": "^1.1.0",
+            "hash.js": "^1.0.0",
+            "hmac-drbg": "^1.0.1",
+            "inherits": "^2.0.4",
+            "minimalistic-assert": "^1.0.1",
+            "minimalistic-crypto-utils": "^1.0.1"
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+          "resolved": "https://registry.npmjs.org/keccak/-/keccak-3.0.2.tgz",
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+          "dev": true,
+          "requires": {
+            "node-addon-api": "^2.0.0",
+            "node-gyp-build": "^4.2.0",
+            "readable-stream": "^3.6.0"
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+        "readable-stream": {
+          "version": "3.6.0",
+          "resolved": "https://registry.npmjs.org/readable-stream/-/readable-stream-3.6.0.tgz",
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+          "dev": true,
+          "requires": {
+            "inherits": "^2.0.3",
+            "string_decoder": "^1.1.1",
+            "util-deprecate": "^1.0.1"
+          }
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+        "scrypt-js": {
+          "version": "3.0.1",
+          "resolved": "https://registry.npmjs.org/scrypt-js/-/scrypt-js-3.0.1.tgz",
+          "integrity": "sha512-cdwTTnqPu0Hyvf5in5asVdZocVDTNRmR7XEcJuIzMjJeSHybHl7vpB66AzwTaIg6CLSbtjcxc8fqcySfnTkccA==",
+          "dev": true
+        },
+        "secp256k1": {
+          "version": "4.0.3",
+          "resolved": "https://registry.npmjs.org/secp256k1/-/secp256k1-4.0.3.tgz",
+          "integrity": "sha512-NLZVf+ROMxwtEj3Xa562qgv2BK5e2WNmXPiOdVIPLgs6lyTzMvBq0aWTYMI5XCP9jZMVKOcqZLw/Wc4vDkuxhA==",
+          "dev": true,
+          "requires": {
+            "elliptic": "^6.5.4",
+            "node-addon-api": "^2.0.0",
+            "node-gyp-build": "^4.2.0"
+          }
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+    },
     "ethereum-protocol": {
       "version": "1.0.1",
       "resolved": "https://registry.npmjs.org/ethereum-protocol/-/ethereum-protocol-1.0.1.tgz",
       "integrity": "sha512-3KLX1mHuEsBW0dKG+c6EOJS1NBNqdCICvZW9sInmZTt5aY0oxmHVggYRE0lJu1tcnMD1K+AKHdLi6U43Awm1Vg==",
       "dev": true
     },
-    "ethereumjs-abi": {
-      "version": "git+https://github.com/ethereumjs/ethereumjs-abi.git#1cfbb13862f90f0b391d8a699544d5fe4dfb8c7b",
-      "from": "git+https://github.com/ethereumjs/ethereumjs-abi.git",
-      "dev": true,
-      "requires": {
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-        "ethereumjs-util": "^6.0.0"
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@@ -2401,12 +2645,6 @@
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-      "resolved": "https://registry.npmjs.org/fast-deep-equal/-/fast-deep-equal-2.0.1.tgz",
-      "integrity": "sha1-ewUhjd+WZ79/Nwv3/bLLFf3Qqkk=",
-      "dev": true
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       "resolved": "https://registry.npmjs.org/fast-json-stable-stringify/-/fast-json-stable-stringify-2.0.0.tgz",
@@ -3574,12 +3812,24 @@
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       "integrity": "sha1-yobR/ogoFpsBICCOPchCS524NCw="
     },
+    "node-addon-api": {
+      "version": "2.0.2",
+      "resolved": "https://registry.npmjs.org/node-addon-api/-/node-addon-api-2.0.2.tgz",
+      "integrity": "sha512-Ntyt4AIXyaLIuMHF6IOoTakB3K+RWxwtsHNRxllEoA6vPwP9o4866g6YWDLUdnucilZhmkxiHwHr11gAENw+QA==",
+      "dev": true
+    },
     "node-fetch": {
       "version": "2.1.2",
       "resolved": "https://registry.npmjs.org/node-fetch/-/node-fetch-2.1.2.tgz",
       "integrity": "sha1-q4hOjn5X44qUR1POxwb3iNF2i7U=",
       "dev": true
     },
+    "node-gyp-build": {
+      "version": "4.3.0",
+      "resolved": "https://registry.npmjs.org/node-gyp-build/-/node-gyp-build-4.3.0.tgz",
+      "integrity": "sha512-iWjXZvmboq0ja1pUGULQBexmxq8CV4xBhX7VDOTbL7ZR4FOowwY/VOtRxBN/yKxmdGoIp4j5ysNT4u3S2pDQ3Q==",
+      "dev": true
+    },
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@@ -5130,59 +5380,6 @@
         "web3-utils": "1.2.1"
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-    "web3-provider-engine": {
-      "version": "git+https://github.com/trufflesuite/provider-engine.git#3538c60bc4836b73ccae1ac3f64c8fed8ef19c1a",
-      "from": "git+https://github.com/trufflesuite/provider-engine.git#web3-one",
-      "dev": true,
-      "requires": {
-        "async": "^2.5.0",
-        "backoff": "^2.5.0",
-        "clone": "^2.0.0",
-        "cross-fetch": "^2.1.0",
-        "eth-block-tracker": "^3.0.0",
-        "eth-json-rpc-infura": "^3.1.0",
-        "eth-sig-util": "^1.4.2",
-        "ethereumjs-block": "^1.2.2",
-        "ethereumjs-tx": "^1.2.0",
-        "ethereumjs-util": "^5.1.5",
-        "ethereumjs-vm": "^2.3.4",
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-        "json-stable-stringify": "^1.0.1",
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-        "readable-stream": "^2.2.9",
-        "request": "^2.85.0",
-        "semaphore": "^1.0.3",
-        "ws": "^5.1.1",
-        "xhr": "^2.2.0",
-        "xtend": "^4.0.1"
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-          "version": "5.2.0",
-          "resolved": "https://registry.npmjs.org/ethereumjs-util/-/ethereumjs-util-5.2.0.tgz",
-          "integrity": "sha512-CJAKdI0wgMbQFLlLRtZKGcy/L6pzVRgelIZqRqNbuVFM3K9VEnyfbcvz0ncWMRNCe4kaHWjwRYQcYMucmwsnWA==",
-          "dev": true,
-          "requires": {
-            "bn.js": "^4.11.0",
-            "create-hash": "^1.1.2",
-            "ethjs-util": "^0.1.3",
-            "keccak": "^1.0.2",
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-          "resolved": "https://registry.npmjs.org/ws/-/ws-5.2.2.tgz",
-          "integrity": "sha512-jaHFD6PFv6UgoIVda6qZllptQsMlDEJkTQcybzzXDYM1XO9Y8em691FGMPmM46WGyLU4z9KMgQN+qrux/nhlHA==",
-          "dev": true,
-          "requires": {
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-          }
-        }
-      }
-    },
     "web3-providers-http": {
       "version": "1.2.1",
       "resolved": "https://registry.npmjs.org/web3-providers-http/-/web3-providers-http-1.2.1.tgz",
@@ -5213,6 +5410,20 @@
         "underscore": "1.9.1",
         "web3-core-helpers": "1.2.1",
         "websocket": "github:web3-js/WebSocket-Node#905deb4812572b344f5801f8c9ce8bb02799d82e"
+      },
+      "dependencies": {
+        "websocket": {
+          "version": "github:web3-js/WebSocket-Node#905deb4812572b344f5801f8c9ce8bb02799d82e",
+          "from": "github:web3-js/WebSocket-Node#polyfill/globalThis",
+          "dev": true,
+          "requires": {
+            "debug": "^2.2.0",
+            "es5-ext": "^0.10.50",
+            "nan": "^2.14.0",
+            "typedarray-to-buffer": "^3.1.5",
+            "yaeti": "^0.0.6"
+          }
+        }
       }
     },
     "web3-shh": {
@@ -5255,18 +5466,6 @@
         }
       }
     },
-    "websocket": {
-      "version": "github:web3-js/WebSocket-Node#905deb4812572b344f5801f8c9ce8bb02799d82e",
-      "from": "github:web3-js/WebSocket-Node#polyfill/globalThis",
-      "dev": true,
-      "requires": {
-        "debug": "^2.2.0",
-        "es5-ext": "^0.10.50",
-        "nan": "^2.14.0",
-        "typedarray-to-buffer": "^3.1.5",
-        "yaeti": "^0.0.6"
-      }
-    },
     "whatwg-fetch": {
       "version": "2.0.4",
       "resolved": "https://registry.npmjs.org/whatwg-fetch/-/whatwg-fetch-2.0.4.tgz",