diff --git a/docker-compose.local.yml b/docker-compose.local.yml
index 744a837..cc8bbca 100644
--- a/docker-compose.local.yml
+++ b/docker-compose.local.yml
@@ -6,7 +6,7 @@ services:
         command: bash -c "./wait-for-it.sh mongo:27017 && ./wait-for-it.sh ganache-cli:8545 && npm start"
     ganache-cli:
         container_name: test-blockchain
-        image: "trufflesuite/ganache-cli:v6.4.3"
+        image: "trufflesuite/ganache-cli:v6.9.0"
         command: ganache-cli -d
         ports:
             - 8545:8545
diff --git a/package-lock.json b/package-lock.json
index 315e255..d2b1103 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -81,9 +81,9 @@
       "dev": true
     },
     "@babel/runtime": {
-      "version": "7.4.5",
-      "resolved": "https://registry.npmjs.org/@babel/runtime/-/runtime-7.4.5.tgz",
-      "integrity": "sha512-TuI4qpWZP6lGOGIuGWtp9sPluqYICmbk8T/1vpSysqJxRPkudh/ofFWyqdcMsDf2s7KvDL4/YHgKyvcS3g9CJQ==",
+      "version": "7.8.4",
+      "resolved": "https://registry.npmjs.org/@babel/runtime/-/runtime-7.8.4.tgz",
+      "integrity": "sha512-neAp3zt80trRVBI1x0azq6c57aNBqYZH8KhMm3TaB7wEI5Q4A2SHfBHE8w9gOhI/lrqxtEbXZgQIrHP+wvSGwQ==",
       "requires": {
         "regenerator-runtime": "^0.13.2"
       }
@@ -529,9 +529,9 @@
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-      "version": "1.0.0",
-      "resolved": "https://registry.npmjs.org/async-limiter/-/async-limiter-1.0.0.tgz",
-      "integrity": "sha512-jp/uFnooOiO+L211eZOoSyzpOITMXx1rBITauYykG3BRYPu8h0UcxsPNB04RR5vo4Tyz3+ay17tR6JVf9qzYWg=="
+      "version": "1.0.1",
+      "resolved": "https://registry.npmjs.org/async-limiter/-/async-limiter-1.0.1.tgz",
+      "integrity": "sha512-csOlWGAcRFJaI6m+F2WKdnMKr4HhdhFVBk0H/QbJFMCr+uO2kwohwXQPxw/9OCxp05r5ghVBFSyioixx3gfkNQ=="
     },
     "asynckit": {
       "version": "0.4.0",
@@ -579,9 +579,9 @@
       "integrity": "sha1-ibTRmasr7kneFk6gK4nORi1xt2c="
     },
     "base64-js": {
-      "version": "1.3.0",
-      "resolved": "https://registry.npmjs.org/base64-js/-/base64-js-1.3.0.tgz",
-      "integrity": "sha512-ccav/yGvoa80BQDljCxsmmQ3Xvx60/UpBIij5QN21W3wBi/hhIC9OoO+KLpu9IJTS9j4DRVJ3aDDF9cMSoa2lw=="
+      "version": "1.3.1",
+      "resolved": "https://registry.npmjs.org/base64-js/-/base64-js-1.3.1.tgz",
+      "integrity": "sha512-mLQ4i2QO1ytvGWFWmcngKO//JXAQueZvwEKtjgQFM4jIK0kU+ytMfplL8j+n5mspOfjHwoAg+9yhb7BwAHm36g=="
     },
     "bcrypt-pbkdf": {
       "version": "1.0.2",
@@ -713,9 +713,9 @@
       },
       "dependencies": {
         "safe-buffer": {
-          "version": "5.1.2",
-          "resolved": "https://registry.npmjs.org/safe-buffer/-/safe-buffer-5.1.2.tgz",
-          "integrity": "sha512-Gd2UZBJDkXlY7GbJxfsE8/nvKkUEU1G38c1siN6QP6a9PT9MmHB8GnpscSmMJSoF8LOIrt8ud/wPtojys4G6+g=="
+          "version": "5.2.0",
+          "resolved": "https://registry.npmjs.org/safe-buffer/-/safe-buffer-5.2.0.tgz",
+          "integrity": "sha512-fZEwUGbVl7kouZs1jCdMLdt95hdIv0ZeHg6L7qPeciMZhZ+/gdesW4wgTARkrFWEpspjEATAzUGPG8N2jJiwbg=="
         }
       }
     },
@@ -757,9 +757,9 @@
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     },
     "buffer": {
-      "version": "5.2.1",
-      "resolved": "https://registry.npmjs.org/buffer/-/buffer-5.2.1.tgz",
-      "integrity": "sha512-c+Ko0loDaFfuPWiL02ls9Xd3GO3cPVmUobQ6t3rXNUk304u6hGq+8N/kFi+QEIKhzK3uwolVhLzszmfLmMLnqg==",
+      "version": "5.4.3",
+      "resolved": "https://registry.npmjs.org/buffer/-/buffer-5.4.3.tgz",
+      "integrity": "sha512-zvj65TkFeIt3i6aj5bIvJDzjjQQGs4o/sNoezg1F1kYap9Nu2jcUdpwzRSJTHMMzG0H7bZkn4rNQpImhuxWX2A==",
       "requires": {
         "base64-js": "^1.0.2",
         "ieee754": "^1.1.4"
@@ -1171,6 +1171,15 @@
         "randomfill": "^1.0.3"
       }
     },
+    "d": {
+      "version": "1.0.1",
+      "resolved": "https://registry.npmjs.org/d/-/d-1.0.1.tgz",
+      "integrity": "sha512-m62ShEObQ39CfralilEQRjH6oAMtNCV1xJyEx5LpRYUVN+EviphDgUc/F3hnYbADmkiNs67Y+3ylmlG7Lnu+FA==",
+      "requires": {
+        "es5-ext": "^0.10.50",
+        "type": "^1.0.1"
+      }
+    },
     "dashdash": {
       "version": "1.14.1",
       "resolved": "https://registry.npmjs.org/dashdash/-/dashdash-1.14.1.tgz",
@@ -1346,9 +1355,9 @@
       "integrity": "sha1-m81S4UwJd2PnSbJ0xDRu0uVgtak="
     },
     "des.js": {
-      "version": "1.0.0",
-      "resolved": "https://registry.npmjs.org/des.js/-/des.js-1.0.0.tgz",
-      "integrity": "sha1-wHTS4qpqipoH29YfmhXCzYPsjsw=",
+      "version": "1.0.1",
+      "resolved": "https://registry.npmjs.org/des.js/-/des.js-1.0.1.tgz",
+      "integrity": "sha512-Q0I4pfFrv2VPd34/vfLrFOoRmlYj3OV50i7fskps1jZWK1kApMWWT9G6RRUeYedLcBDIhnSDaUvJMb3AhUlaEA==",
       "requires": {
         "inherits": "^2.0.1",
         "minimalistic-assert": "^1.0.0"
@@ -1560,17 +1569,46 @@
         "is-symbol": "^1.0.2"
       }
     },
+    "es5-ext": {
+      "version": "0.10.53",
+      "resolved": "https://registry.npmjs.org/es5-ext/-/es5-ext-0.10.53.tgz",
+      "integrity": "sha512-Xs2Stw6NiNHWypzRTY1MtaG/uJlwCk8kH81920ma8mvN8Xq1gsfhZvpkImLQArw8AHnv8MT2I45J3c0R8slE+Q==",
+      "requires": {
+        "es6-iterator": "~2.0.3",
+        "es6-symbol": "~3.1.3",
+        "next-tick": "~1.0.0"
+      }
+    },
     "es6-error": {
       "version": "4.1.1",
       "resolved": "https://registry.npmjs.org/es6-error/-/es6-error-4.1.1.tgz",
       "integrity": "sha512-Um/+FxMr9CISWh0bi5Zv0iOD+4cFh5qLeks1qhAopKVAJw3drgKbKySikp7wGhDL0HPeaja0P5ULZrxLkniUVg==",
       "dev": true
     },
+    "es6-iterator": {
+      "version": "2.0.3",
+      "resolved": "https://registry.npmjs.org/es6-iterator/-/es6-iterator-2.0.3.tgz",
+      "integrity": "sha1-p96IkUGgWpSwhUQDstCg+/qY87c=",
+      "requires": {
+        "d": "1",
+        "es5-ext": "^0.10.35",
+        "es6-symbol": "^3.1.1"
+      }
+    },
     "es6-promise": {
       "version": "3.0.2",
       "resolved": "https://registry.npmjs.org/es6-promise/-/es6-promise-3.0.2.tgz",
       "integrity": "sha1-AQ1YWEI6XxGJeWZfRkhqlcbuK7Y="
     },
+    "es6-symbol": {
+      "version": "3.1.3",
+      "resolved": "https://registry.npmjs.org/es6-symbol/-/es6-symbol-3.1.3.tgz",
+      "integrity": "sha512-NJ6Yn3FuDinBaBRWl/q5X/s4koRHBrgKAu+yGI6JCBeiu3qrcbJhwT2GeR/EXVfylRk8dpQVJoLEFhK+Mu31NA==",
+      "requires": {
+        "d": "^1.0.1",
+        "ext": "^1.1.2"
+      }
+    },
     "escape-html": {
       "version": "1.0.3",
       "resolved": "https://registry.npmjs.org/escape-html/-/escape-html-1.0.3.tgz",
@@ -1724,13 +1762,12 @@
       }
     },
     "eth-lib": {
-      "version": "0.1.27",
-      "resolved": "https://registry.npmjs.org/eth-lib/-/eth-lib-0.1.27.tgz",
-      "integrity": "sha512-B8czsfkJYzn2UIEMwjc7Mbj+Cy72V+/OXH/tb44LV8jhrjizQJJ325xMOMyk3+ETa6r6oi0jsUY14+om8mQMWA==",
+      "version": "0.1.29",
+      "resolved": "https://registry.npmjs.org/eth-lib/-/eth-lib-0.1.29.tgz",
+      "integrity": "sha512-bfttrr3/7gG4E02HoWTDUcDDslN003OlOoBxk9virpAZQ1ja/jDgwkWB8QfJF7ojuEowrqy+lzp9VcJG7/k5bQ==",
       "requires": {
         "bn.js": "^4.11.6",
         "elliptic": "^6.4.0",
-        "keccakjs": "^0.2.1",
         "nano-json-stream-parser": "^0.1.2",
         "servify": "^0.1.12",
         "ws": "^3.0.0",
@@ -1952,6 +1989,21 @@
         }
       }
     },
+    "ext": {
+      "version": "1.4.0",
+      "resolved": "https://registry.npmjs.org/ext/-/ext-1.4.0.tgz",
+      "integrity": "sha512-Key5NIsUxdqKg3vIsdw9dSuXpPCQ297y6wBjL30edxwPgt2E44WcWBZey/ZvUc6sERLTxKdyCu4gZFmUbk1Q7A==",
+      "requires": {
+        "type": "^2.0.0"
+      },
+      "dependencies": {
+        "type": {
+          "version": "2.0.0",
+          "resolved": "https://registry.npmjs.org/type/-/type-2.0.0.tgz",
+          "integrity": "sha512-KBt58xCHry4Cejnc2ISQAF7QY+ORngsWfxezO68+12hKV6lQY8P/psIkcbjeHWn7MqcgciWJyCCevFMJdIXpow=="
+        }
+      }
+    },
     "extend": {
       "version": "3.0.2",
       "resolved": "https://registry.npmjs.org/extend/-/extend-3.0.2.tgz",
@@ -2187,12 +2239,676 @@
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     },
     "ganache-cli": {
-      "version": "6.1.8",
-      "resolved": "https://registry.npmjs.org/ganache-cli/-/ganache-cli-6.1.8.tgz",
-      "integrity": "sha512-yXzteu4SIgUL31mnpm9j+x6dpHUw0p/nsRVkcySKq0w+1vDxH9jMErP1QhZAJuTVE6ni4nfvGSNkaQx5cD3jfg==",
+      "version": "6.9.0",
+      "resolved": "https://registry.npmjs.org/ganache-cli/-/ganache-cli-6.9.0.tgz",
+      "integrity": "sha512-ZdL6kPrApXF/O+f6uU431OJcwxMk69H3KPDSHHrMP82ZvZRNpDHbR+rVv7XX/YUeoQ5q6nZ2AFiGiFAVn9pfzA==",
       "dev": true,
       "requires": {
-        "source-map-support": "^0.5.3"
+        "ethereumjs-util": "6.1.0",
+        "source-map-support": "0.5.12",
+        "yargs": "13.2.4"
+      },
+      "dependencies": {
+        "ansi-regex": {
+          "version": "4.1.0",
+          "bundled": true,
+          "dev": true
+        },
+        "ansi-styles": {
+          "version": "3.2.1",
+          "bundled": true,
+          "dev": true,
+          "requires": {
+            "color-convert": "^1.9.0"
+          }
+        },
+        "bindings": {
+          "version": "1.5.0",
+          "bundled": true,
+          "dev": true,
+          "requires": {
+            "file-uri-to-path": "1.0.0"
+          }
+        },
+        "bip66": {
+          "version": "1.1.5",
+          "bundled": true,
+          "dev": true,
+          "requires": {
+            "safe-buffer": "^5.0.1"
+          }
+        },
+        "bn.js": {
+          "version": "4.11.8",
+          "bundled": true,
+          "dev": true
+        },
+        "brorand": {
+          "version": "1.1.0",
+          "bundled": true,
+          "dev": true
+        },
+        "browserify-aes": {
+          "version": "1.2.0",
+          "bundled": true,
+          "dev": true,
+          "requires": {
+            "buffer-xor": "^1.0.3",
+            "cipher-base": "^1.0.0",
+            "create-hash": "^1.1.0",
+            "evp_bytestokey": "^1.0.3",
+            "inherits": "^2.0.1",
+            "safe-buffer": "^5.0.1"
+          }
+        },
+        "buffer-from": {
+          "version": "1.1.1",
+          "bundled": true,
+          "dev": true
+        },
+        "buffer-xor": {
+          "version": "1.0.3",
+          "bundled": true,
+          "dev": true
+        },
+        "camelcase": {
+          "version": "5.3.1",
+          "bundled": true,
+          "dev": true
+        },
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+          "version": "1.0.4",
+          "bundled": true,
+          "dev": true,
+          "requires": {
+            "inherits": "^2.0.1",
+            "safe-buffer": "^5.0.1"
+          }
+        },
+        "cliui": {
+          "version": "5.0.0",
+          "bundled": true,
+          "dev": true,
+          "requires": {
+            "string-width": "^3.1.0",
+            "strip-ansi": "^5.2.0",
+            "wrap-ansi": "^5.1.0"
+          }
+        },
+        "color-convert": {
+          "version": "1.9.3",
+          "bundled": true,
+          "dev": true,
+          "requires": {
+            "color-name": "1.1.3"
+          }
+        },
+        "color-name": {
+          "version": "1.1.3",
+          "bundled": true,
+          "dev": true
+        },
+        "create-hash": {
+          "version": "1.2.0",
+          "bundled": true,
+          "dev": true,
+          "requires": {
+            "cipher-base": "^1.0.1",
+            "inherits": "^2.0.1",
+            "md5.js": "^1.3.4",
+            "ripemd160": "^2.0.1",
+            "sha.js": "^2.4.0"
+          }
+        },
+        "create-hmac": {
+          "version": "1.1.7",
+          "bundled": true,
+          "dev": true,
+          "requires": {
+            "cipher-base": "^1.0.3",
+            "create-hash": "^1.1.0",
+            "inherits": "^2.0.1",
+            "ripemd160": "^2.0.0",
+            "safe-buffer": "^5.0.1",
+            "sha.js": "^2.4.8"
+          }
+        },
+        "cross-spawn": {
+          "version": "6.0.5",
+          "bundled": true,
+          "dev": true,
+          "requires": {
+            "nice-try": "^1.0.4",
+            "path-key": "^2.0.1",
+            "semver": "^5.5.0",
+            "shebang-command": "^1.2.0",
+            "which": "^1.2.9"
+          }
+        },
+        "decamelize": {
+          "version": "1.2.0",
+          "bundled": true,
+          "dev": true
+        },
+        "drbg.js": {
+          "version": "1.0.1",
+          "bundled": true,
+          "dev": true,
+          "requires": {
+            "browserify-aes": "^1.0.6",
+            "create-hash": "^1.1.2",
+            "create-hmac": "^1.1.4"
+          }
+        },
+        "elliptic": {
+          "version": "6.5.0",
+          "bundled": true,
+          "dev": true,
+          "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"
+          }
+        },
+        "emoji-regex": {
+          "version": "7.0.3",
+          "bundled": true,
+          "dev": true
+        },
+        "end-of-stream": {
+          "version": "1.4.1",
+          "bundled": true,
+          "dev": true,
+          "requires": {
+            "once": "^1.4.0"
+          }
+        },
+        "ethereumjs-util": {
+          "version": "6.1.0",
+          "bundled": true,
+          "dev": true,
+          "requires": {
+            "bn.js": "^4.11.0",
+            "create-hash": "^1.1.2",
+            "ethjs-util": "0.1.6",
+            "keccak": "^1.0.2",
+            "rlp": "^2.0.0",
+            "safe-buffer": "^5.1.1",
+            "secp256k1": "^3.0.1"
+          }
+        },
+        "ethjs-util": {
+          "version": "0.1.6",
+          "bundled": true,
+          "dev": true,
+          "requires": {
+            "is-hex-prefixed": "1.0.0",
+            "strip-hex-prefix": "1.0.0"
+          }
+        },
+        "evp_bytestokey": {
+          "version": "1.0.3",
+          "bundled": true,
+          "dev": true,
+          "requires": {
+            "md5.js": "^1.3.4",
+            "safe-buffer": "^5.1.1"
+          }
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+        "execa": {
+          "version": "1.0.0",
+          "bundled": true,
+          "dev": true,
+          "requires": {
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+            "get-stream": "^4.0.0",
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+            "signal-exit": "^3.0.0",
+            "strip-eof": "^1.0.0"
+          }
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+        "file-uri-to-path": {
+          "version": "1.0.0",
+          "bundled": true,
+          "dev": true
+        },
+        "find-up": {
+          "version": "3.0.0",
+          "bundled": true,
+          "dev": true,
+          "requires": {
+            "locate-path": "^3.0.0"
+          }
+        },
+        "get-caller-file": {
+          "version": "2.0.5",
+          "bundled": true,
+          "dev": true
+        },
+        "get-stream": {
+          "version": "4.1.0",
+          "bundled": true,
+          "dev": true,
+          "requires": {
+            "pump": "^3.0.0"
+          }
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+        "hash-base": {
+          "version": "3.0.4",
+          "bundled": true,
+          "dev": true,
+          "requires": {
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+            "safe-buffer": "^5.0.1"
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+        "hash.js": {
+          "version": "1.1.7",
+          "bundled": true,
+          "dev": true,
+          "requires": {
+            "inherits": "^2.0.3",
+            "minimalistic-assert": "^1.0.1"
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+        },
+        "hmac-drbg": {
+          "version": "1.0.1",
+          "bundled": true,
+          "dev": true,
+          "requires": {
+            "hash.js": "^1.0.3",
+            "minimalistic-assert": "^1.0.0",
+            "minimalistic-crypto-utils": "^1.0.1"
+          }
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+        "inherits": {
+          "version": "2.0.4",
+          "bundled": true,
+          "dev": true
+        },
+        "invert-kv": {
+          "version": "2.0.0",
+          "bundled": true,
+          "dev": true
+        },
+        "is-fullwidth-code-point": {
+          "version": "2.0.0",
+          "bundled": true,
+          "dev": true
+        },
+        "is-hex-prefixed": {
+          "version": "1.0.0",
+          "bundled": true,
+          "dev": true
+        },
+        "is-stream": {
+          "version": "1.1.0",
+          "bundled": true,
+          "dev": true
+        },
+        "isexe": {
+          "version": "2.0.0",
+          "bundled": true,
+          "dev": true
+        },
+        "keccak": {
+          "version": "1.4.0",
+          "bundled": true,
+          "dev": true,
+          "requires": {
+            "bindings": "^1.2.1",
+            "inherits": "^2.0.3",
+            "nan": "^2.2.1",
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+          "version": "2.0.0",
+          "bundled": true,
+          "dev": true,
+          "requires": {
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+          }
+        },
+        "locate-path": {
+          "version": "3.0.0",
+          "bundled": true,
+          "dev": true,
+          "requires": {
+            "p-locate": "^3.0.0",
+            "path-exists": "^3.0.0"
+          }
+        },
+        "map-age-cleaner": {
+          "version": "0.1.3",
+          "bundled": true,
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+          "requires": {
+            "bn.js": "^4.11.6",
+            "elliptic": "^6.4.0",
+            "keccakjs": "^0.2.1",
+            "nano-json-stream-parser": "^0.1.2",
+            "servify": "^0.1.12",
+            "ws": "^3.0.0",
+            "xhr-request-promise": "^0.1.2"
+          }
+        },
         "underscore": {
           "version": "1.8.3",
           "resolved": "https://registry.npmjs.org/underscore/-/underscore-1.8.3.tgz",
@@ -5474,6 +6284,20 @@
         "web3-utils": "1.0.0-beta.55"
       },
       "dependencies": {
+        "elliptic": {
+          "version": "6.5.2",
+          "resolved": "https://registry.npmjs.org/elliptic/-/elliptic-6.5.2.tgz",
+          "integrity": "sha512-f4x70okzZbIQl/NSRLkI/+tteV/9WqL98zx+SQ69KbXxmVrmjwsNUPn/gYJJ0sHvEak24cZgHIPegRePAtA/xw==",
+          "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"
+          }
+        },
         "eth-lib": {
           "version": "0.2.8",
           "resolved": "https://registry.npmjs.org/eth-lib/-/eth-lib-0.2.8.tgz",
@@ -5485,33 +6309,19 @@
           }
         },
         "ethers": {
-          "version": "4.0.32",
-          "resolved": "https://registry.npmjs.org/ethers/-/ethers-4.0.32.tgz",
-          "integrity": "sha512-r0k2tBNF6MYEsvwmINeP3VPppD/7eAZyiOk/ifDDawXGCKqr3iEQkPq6OZSDVD+4Jie38WPteS9thXzpn2+A5Q==",
+          "version": "4.0.44",
+          "resolved": "https://registry.npmjs.org/ethers/-/ethers-4.0.44.tgz",
+          "integrity": "sha512-kCkMPkpYjBkxzqjcuYUfDY7VHDbf5EXnfRPUOazdqdf59SvXaT+w5lgauxLlk1UjxnAiNfeNS87rkIXnsTaM7Q==",
           "requires": {
-            "@types/node": "^10.3.2",
             "aes-js": "3.0.0",
             "bn.js": "^4.4.0",
-            "elliptic": "6.3.3",
+            "elliptic": "6.5.2",
             "hash.js": "1.1.3",
             "js-sha3": "0.5.7",
             "scrypt-js": "2.0.4",
             "setimmediate": "1.0.4",
             "uuid": "2.0.1",
             "xmlhttprequest": "1.8.0"
-          },
-          "dependencies": {
-            "elliptic": {
-              "version": "6.3.3",
-              "resolved": "https://registry.npmjs.org/elliptic/-/elliptic-6.3.3.tgz",
-              "integrity": "sha1-VILZZG1UvLif19mU/J4ulWiHbj8=",
-              "requires": {
-                "bn.js": "^4.4.0",
-                "brorand": "^1.0.1",
-                "hash.js": "^1.0.0",
-                "inherits": "^2.0.1"
-              }
-            }
           }
         },
         "eventemitter3": {
@@ -5655,23 +6465,6 @@
             "bn.js": "4.11.8",
             "web3-utils": "1.0.0-beta.55"
           }
-        },
-        "web3-utils": {
-          "version": "1.0.0-beta.55",
-          "resolved": "https://registry.npmjs.org/web3-utils/-/web3-utils-1.0.0-beta.55.tgz",
-          "integrity": "sha512-ASWqUi8gtWK02Tp8ZtcoAbHenMpQXNvHrakgzvqTNNZn26wgpv+Q4mdPi0KOR6ZgHFL8R/9b5BBoUTglS1WPpg==",
-          "requires": {
-            "@babel/runtime": "^7.3.1",
-            "@types/bn.js": "^4.11.4",
-            "@types/node": "^10.12.18",
-            "bn.js": "4.11.8",
-            "eth-lib": "0.2.8",
-            "ethjs-unit": "^0.1.6",
-            "lodash": "^4.17.11",
-            "number-to-bn": "1.7.0",
-            "randombytes": "^2.1.0",
-            "utf8": "2.1.1"
-          }
         }
       }
     },
@@ -5695,6 +6488,20 @@
           "resolved": "https://registry.npmjs.org/bn.js/-/bn.js-4.11.6.tgz",
           "integrity": "sha1-UzRK2xRhehP26N0s4okF0cC6MhU="
         },
+        "eth-lib": {
+          "version": "0.1.27",
+          "resolved": "https://registry.npmjs.org/eth-lib/-/eth-lib-0.1.27.tgz",
+          "integrity": "sha512-B8czsfkJYzn2UIEMwjc7Mbj+Cy72V+/OXH/tb44LV8jhrjizQJJ325xMOMyk3+ETa6r6oi0jsUY14+om8mQMWA==",
+          "requires": {
+            "bn.js": "^4.11.6",
+            "elliptic": "^6.4.0",
+            "keccakjs": "^0.2.1",
+            "nano-json-stream-parser": "^0.1.2",
+            "servify": "^0.1.12",
+            "ws": "^3.0.0",
+            "xhr-request-promise": "^0.1.2"
+          }
+        },
         "underscore": {
           "version": "1.8.3",
           "resolved": "https://registry.npmjs.org/underscore/-/underscore-1.8.3.tgz",
@@ -5745,6 +6552,20 @@
           "resolved": "https://registry.npmjs.org/bn.js/-/bn.js-4.11.6.tgz",
           "integrity": "sha1-UzRK2xRhehP26N0s4okF0cC6MhU="
         },
+        "eth-lib": {
+          "version": "0.1.27",
+          "resolved": "https://registry.npmjs.org/eth-lib/-/eth-lib-0.1.27.tgz",
+          "integrity": "sha512-B8czsfkJYzn2UIEMwjc7Mbj+Cy72V+/OXH/tb44LV8jhrjizQJJ325xMOMyk3+ETa6r6oi0jsUY14+om8mQMWA==",
+          "requires": {
+            "bn.js": "^4.11.6",
+            "elliptic": "^6.4.0",
+            "keccakjs": "^0.2.1",
+            "nano-json-stream-parser": "^0.1.2",
+            "servify": "^0.1.12",
+            "ws": "^3.0.0",
+            "xhr-request-promise": "^0.1.2"
+          }
+        },
         "underscore": {
           "version": "1.8.3",
           "resolved": "https://registry.npmjs.org/underscore/-/underscore-1.8.3.tgz",
@@ -5783,6 +6604,20 @@
           "resolved": "https://registry.npmjs.org/bn.js/-/bn.js-4.11.6.tgz",
           "integrity": "sha1-UzRK2xRhehP26N0s4okF0cC6MhU="
         },
+        "eth-lib": {
+          "version": "0.1.27",
+          "resolved": "https://registry.npmjs.org/eth-lib/-/eth-lib-0.1.27.tgz",
+          "integrity": "sha512-B8czsfkJYzn2UIEMwjc7Mbj+Cy72V+/OXH/tb44LV8jhrjizQJJ325xMOMyk3+ETa6r6oi0jsUY14+om8mQMWA==",
+          "requires": {
+            "bn.js": "^4.11.6",
+            "elliptic": "^6.4.0",
+            "keccakjs": "^0.2.1",
+            "nano-json-stream-parser": "^0.1.2",
+            "servify": "^0.1.12",
+            "ws": "^3.0.0",
+            "xhr-request-promise": "^0.1.2"
+          }
+        },
         "underscore": {
           "version": "1.8.3",
           "resolved": "https://registry.npmjs.org/underscore/-/underscore-1.8.3.tgz",
@@ -5819,6 +6654,20 @@
           "resolved": "https://registry.npmjs.org/bn.js/-/bn.js-4.11.6.tgz",
           "integrity": "sha1-UzRK2xRhehP26N0s4okF0cC6MhU="
         },
+        "eth-lib": {
+          "version": "0.1.27",
+          "resolved": "https://registry.npmjs.org/eth-lib/-/eth-lib-0.1.27.tgz",
+          "integrity": "sha512-B8czsfkJYzn2UIEMwjc7Mbj+Cy72V+/OXH/tb44LV8jhrjizQJJ325xMOMyk3+ETa6r6oi0jsUY14+om8mQMWA==",
+          "requires": {
+            "bn.js": "^4.11.6",
+            "elliptic": "^6.4.0",
+            "keccakjs": "^0.2.1",
+            "nano-json-stream-parser": "^0.1.2",
+            "servify": "^0.1.12",
+            "ws": "^3.0.0",
+            "xhr-request-promise": "^0.1.2"
+          }
+        },
         "underscore": {
           "version": "1.8.3",
           "resolved": "https://registry.npmjs.org/underscore/-/underscore-1.8.3.tgz",
@@ -5866,21 +6715,16 @@
             "ms": "2.0.0"
           }
         },
-        "eth-lib": {
-          "version": "0.2.8",
-          "resolved": "https://registry.npmjs.org/eth-lib/-/eth-lib-0.2.8.tgz",
-          "integrity": "sha512-ArJ7x1WcWOlSpzdoTBX8vkwlkSQ85CjjifSZtV4co64vWxSV8geWfPI9x4SVYu3DSxnX4yWFVTtGL+j9DUFLNw==",
-          "requires": {
-            "bn.js": "^4.11.6",
-            "elliptic": "^6.4.0",
-            "xhr-request-promise": "^0.1.2"
-          }
-        },
         "eventemitter3": {
           "version": "3.1.0",
           "resolved": "https://registry.npmjs.org/eventemitter3/-/eventemitter3-3.1.0.tgz",
           "integrity": "sha512-ivIvhpq/Y0uSjcHDcOIccjmYjGLcP09MFGE7ysAwkAvkXfpZlC985pH2/ui64DKazbTW/4kN3yqozUxlXzI6cA=="
         },
+        "nan": {
+          "version": "2.14.0",
+          "resolved": "https://registry.npmjs.org/nan/-/nan-2.14.0.tgz",
+          "integrity": "sha512-INOFj37C7k3AfaNTtX8RhsTw7qRy7eLET14cROi9+5HAVbbHuIWUHEauBv5qT4Av2tWasiTY1Jw6puUNqRJXQg=="
+        },
         "web3-core": {
           "version": "1.0.0-beta.55",
           "resolved": "https://registry.npmjs.org/web3-core/-/web3-core-1.0.0-beta.55.tgz",
@@ -5942,30 +6786,14 @@
             "web3-utils": "1.0.0-beta.55"
           }
         },
-        "web3-utils": {
-          "version": "1.0.0-beta.55",
-          "resolved": "https://registry.npmjs.org/web3-utils/-/web3-utils-1.0.0-beta.55.tgz",
-          "integrity": "sha512-ASWqUi8gtWK02Tp8ZtcoAbHenMpQXNvHrakgzvqTNNZn26wgpv+Q4mdPi0KOR6ZgHFL8R/9b5BBoUTglS1WPpg==",
-          "requires": {
-            "@babel/runtime": "^7.3.1",
-            "@types/bn.js": "^4.11.4",
-            "@types/node": "^10.12.18",
-            "bn.js": "4.11.8",
-            "eth-lib": "0.2.8",
-            "ethjs-unit": "^0.1.6",
-            "lodash": "^4.17.11",
-            "number-to-bn": "1.7.0",
-            "randombytes": "^2.1.0",
-            "utf8": "2.1.1"
-          }
-        },
         "websocket": {
-          "version": "1.0.28",
-          "resolved": "https://registry.npmjs.org/websocket/-/websocket-1.0.28.tgz",
-          "integrity": "sha512-00y/20/80P7H4bCYkzuuvvfDvh+dgtXi5kzDf3UcZwN6boTYaKvsrtZ5lIYm1Gsg48siMErd9M4zjSYfYFHTrA==",
+          "version": "1.0.31",
+          "resolved": "https://registry.npmjs.org/websocket/-/websocket-1.0.31.tgz",
+          "integrity": "sha512-VAouplvGKPiKFDTeCCO65vYHsyay8DqoBSlzIO3fayrfOgU94lQN5a1uWVnFrMLceTJw/+fQXR5PGbUVRaHshQ==",
           "requires": {
             "debug": "^2.2.0",
-            "nan": "^2.11.0",
+            "es5-ext": "^0.10.50",
+            "nan": "^2.14.0",
             "typedarray-to-buffer": "^3.1.5",
             "yaeti": "^0.0.6"
           }
@@ -6005,7 +6833,7 @@
       "requires": {
         "underscore": "1.8.3",
         "web3-core-helpers": "1.0.0-beta.36",
-        "websocket": "git://github.com/frozeman/WebSocket-Node.git#browserifyCompatible"
+        "websocket": "git://github.com/frozeman/WebSocket-Node.git#6c72925e3f8aaaea8dc8450f97627e85263999f2"
       },
       "dependencies": {
         "debug": {
diff --git a/package.json b/package.json
index d024250..9258afd 100644
--- a/package.json
+++ b/package.json
@@ -51,9 +51,9 @@
     "mongoose": "5.7.5",
     "node-schedule": "1.3.0",
     "ref": "1.3.5",
-    "web3": "1.0.0-beta.36",
-    "web3-eth-contract": "1.0.0-beta.55",
-    "web3-utils": "1.0.0-beta.55",
+    "web3": "1.2.6",
+    "web3-eth-contract": "1.2.6",
+    "web3-utils": "1.2.6",
     "websocket": "1.0.26",
     "winston": "3.0.0",
     "xmldom": "0.1.27",
@@ -77,7 +77,7 @@
     "chai-as-promised": "7.1.1",
     "coveralls": "3.0.2",
     "dirty-chai": "2.0.1",
-    "ganache-cli": "6.1.8",
+    "ganache-cli": "6.9.0",
     "mocha": "5.2.0",
     "nock": "9.6.1",
     "nyc": "14.1.1",
diff --git a/src/infrastructure/blockchain/ethereum/EthereumOracleAdapter.ts b/src/infrastructure/blockchain/ethereum/EthereumOracleAdapter.ts
index 296973e..331251c 100644
--- a/src/infrastructure/blockchain/ethereum/EthereumOracleAdapter.ts
+++ b/src/infrastructure/blockchain/ethereum/EthereumOracleAdapter.ts
@@ -21,7 +21,7 @@ class EthereumOracleAdapter implements OracleGateway {
   private guard: boolean;
   private contract: Contract;
 
-  constructor(private readonly web3: Web3, abi: AbiItem[], address: string) {
+  constructor(web3: Web3, abi: AbiItem[], address: string) {
     // @ts-ignore
     this.contract = new web3.eth.Contract(abi, address, {from: web3.eth.defaultAccount});
     this.pendingResponses = [];
@@ -87,7 +87,7 @@ class EthereumOracleAdapter implements OracleGateway {
     try {
       await method.send({
         from: process.env.PUBLIC_KEY,
-        gas: await this.web3.eth.estimateGas({to: this.contract.address}),
+        gas: await method.estimateGas({from: process.env.PUBLIC_KEY}),
       });
     } catch (e) {
       error = e;