diff --git a/package-lock.json b/package-lock.json
index 8b50e9d..168e729 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -977,13 +977,131 @@
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         "xhr": "^2.2.0",
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+            }
+          }
+        },
+        "eth-json-rpc-middleware": {
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+          "integrity": "sha1-h03Q+uXpYqVsUOvyjvpv45SSsOc="
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+        "@types/node": "*"
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+    "@types/secp256k1": {
+      "version": "4.0.3",
+      "resolved": "https://registry.npmjs.org/@types/secp256k1/-/secp256k1-4.0.3.tgz",
+      "integrity": "sha512-Da66lEIFeIz9ltsdMZcpQvmrmmoqrfju8pm1BH8WbYjZSwUgCwXLb9C+9XYogwBITnbsSaMdVPb2ekf7TV+03w==",
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@@ -1095,14 +1229,21 @@
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+        }
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@@ -2054,6 +2195,14 @@
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+      "resolved": "https://registry.npmjs.org/base-x/-/base-x-3.0.9.tgz",
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@@ -2103,6 +2252,11 @@
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+      "resolved": "https://registry.npmjs.org/blakejs/-/blakejs-1.1.1.tgz",
+      "integrity": "sha512-bLG6PHOCZJKNshTjGRBvET0vTciwQE6zFKOKKXPDJfwFBd4Ac0yBfPZqcGvGJap50l7ktvlpFqc2jGVaUgbJgg=="
+    },
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@@ -2317,6 +2471,24 @@
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       }
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+      "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"
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       "resolved": "https://registry.npmjs.org/btoa/-/btoa-1.2.1.tgz",
@@ -3752,6 +3924,14 @@
         }
       }
     },
+    "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": {
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       "resolved": "https://registry.npmjs.org/eth-json-rpc-filters/-/eth-json-rpc-filters-4.0.3.tgz",
@@ -3763,6 +3943,40 @@
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         "lodash.flatmap": "^4.5.0",
         "safe-event-emitter": "^1.0.1"
+      },
+      "dependencies": {
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+          "resolved": "https://registry.npmjs.org/eth-json-rpc-middleware/-/eth-json-rpc-middleware-4.4.1.tgz",
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+          "requires": {
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+            "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",
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+            "safe-event-emitter": "^1.0.1"
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+                "safe-event-emitter": "^1.0.1"
+              }
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     "eth-json-rpc-infura": {
@@ -3821,97 +4035,6 @@
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-    "eth-json-rpc-middleware": {
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@@ -3947,6 +4070,14 @@
         "xtend": "^4.0.1"
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+    "eth-rpc-errors": {
+      "version": "3.0.0",
+      "resolved": "https://registry.npmjs.org/eth-rpc-errors/-/eth-rpc-errors-3.0.0.tgz",
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+      "requires": {
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@@ -3954,6 +4085,56 @@
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+        },
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+          "version": "6.5.4",
+          "resolved": "https://registry.npmjs.org/elliptic/-/elliptic-6.5.4.tgz",
+          "integrity": "sha512-iLhC6ULemrljPZb+QutR5TQGB+pdW6KGD5RSegS+8sorOZT+rdQFbsQFJgvN3eRqNALqJer4oQ16YvJHlU8hzQ==",
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+            "brorand": "^1.1.0",
+            "hash.js": "^1.0.0",
+            "hmac-drbg": "^1.0.1",
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+            "minimalistic-crypto-utils": "^1.0.1"
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+        "ethereumjs-abi": {
+          "version": "git+https://github.com/ethereumjs/ethereumjs-abi.git#8431eab7b3384e65e8126a4602520b78031666fb",
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