diff --git a/smart-contracts/yarn.lock b/smart-contracts/yarn.lock
index 2c9765b..d06629b 100644
--- a/smart-contracts/yarn.lock
+++ b/smart-contracts/yarn.lock
@@ -2,6 +2,165 @@
 # yarn lockfile v1
 
 
+"@babel/code-frame@^7.12.13":
+  version "7.12.13"
+  resolved "https://registry.yarnpkg.com/@babel/code-frame/-/code-frame-7.12.13.tgz#dcfc826beef65e75c50e21d3837d7d95798dd658"
+  integrity sha512-HV1Cm0Q3ZrpCR93tkWOYiuYIgLxZXZFVG2VgK+MBWjUqZTundupbfx2aXarXuw5Ko5aMcjtJgbSs4vUGBS5v6g==
+  dependencies:
+    "@babel/highlight" "^7.12.13"
+
+"@babel/compat-data@^7.13.11", "@babel/compat-data@^7.13.15":
+  version "7.14.0"
+  resolved "https://registry.yarnpkg.com/@babel/compat-data/-/compat-data-7.14.0.tgz#a901128bce2ad02565df95e6ecbf195cf9465919"
+  integrity sha512-vu9V3uMM/1o5Hl5OekMUowo3FqXLJSw+s+66nt0fSWVWTtmosdzn45JHOB3cPtZoe6CTBDzvSw0RdOY85Q37+Q==
+
+"@babel/generator@^7.14.0":
+  version "7.14.1"
+  resolved "https://registry.yarnpkg.com/@babel/generator/-/generator-7.14.1.tgz#1f99331babd65700183628da186f36f63d615c93"
+  integrity sha512-TMGhsXMXCP/O1WtQmZjpEYDhCYC9vFhayWZPJSZCGkPJgUqX0rF0wwtrYvnzVxIjcF80tkUertXVk5cwqi5cAQ==
+  dependencies:
+    "@babel/types" "^7.14.1"
+    jsesc "^2.5.1"
+    source-map "^0.5.0"
+
+"@babel/helper-compilation-targets@^7.13.0":
+  version "7.13.16"
+  resolved "https://registry.yarnpkg.com/@babel/helper-compilation-targets/-/helper-compilation-targets-7.13.16.tgz#6e91dccf15e3f43e5556dffe32d860109887563c"
+  integrity sha512-3gmkYIrpqsLlieFwjkGgLaSHmhnvlAYzZLlYVjlW+QwI+1zE17kGxuJGmIqDQdYp56XdmGeD+Bswx0UTyG18xA==
+  dependencies:
+    "@babel/compat-data" "^7.13.15"
+    "@babel/helper-validator-option" "^7.12.17"
+    browserslist "^4.14.5"
+    semver "^6.3.0"
+
+"@babel/helper-define-polyfill-provider@^0.2.0":
+  version "0.2.0"
+  resolved "https://registry.yarnpkg.com/@babel/helper-define-polyfill-provider/-/helper-define-polyfill-provider-0.2.0.tgz#a640051772045fedaaecc6f0c6c69f02bdd34bf1"
+  integrity sha512-JT8tHuFjKBo8NnaUbblz7mIu1nnvUDiHVjXXkulZULyidvo/7P6TY7+YqpV37IfF+KUFxmlK04elKtGKXaiVgw==
+  dependencies:
+    "@babel/helper-compilation-targets" "^7.13.0"
+    "@babel/helper-module-imports" "^7.12.13"
+    "@babel/helper-plugin-utils" "^7.13.0"
+    "@babel/traverse" "^7.13.0"
+    debug "^4.1.1"
+    lodash.debounce "^4.0.8"
+    resolve "^1.14.2"
+    semver "^6.1.2"
+
+"@babel/helper-function-name@^7.12.13":
+  version "7.12.13"
+  resolved "https://registry.yarnpkg.com/@babel/helper-function-name/-/helper-function-name-7.12.13.tgz#93ad656db3c3c2232559fd7b2c3dbdcbe0eb377a"
+  integrity sha512-TZvmPn0UOqmvi5G4vvw0qZTpVptGkB1GL61R6lKvrSdIxGm5Pky7Q3fpKiIkQCAtRCBUwB0PaThlx9vebCDSwA==
+  dependencies:
+    "@babel/helper-get-function-arity" "^7.12.13"
+    "@babel/template" "^7.12.13"
+    "@babel/types" "^7.12.13"
+
+"@babel/helper-get-function-arity@^7.12.13":
+  version "7.12.13"
+  resolved "https://registry.yarnpkg.com/@babel/helper-get-function-arity/-/helper-get-function-arity-7.12.13.tgz#bc63451d403a3b3082b97e1d8b3fe5bd4091e583"
+  integrity sha512-DjEVzQNz5LICkzN0REdpD5prGoidvbdYk1BVgRUOINaWJP2t6avB27X1guXK1kXNrX0WMfsrm1A/ZBthYuIMQg==
+  dependencies:
+    "@babel/types" "^7.12.13"
+
+"@babel/helper-module-imports@^7.12.13", "@babel/helper-module-imports@^7.13.12":
+  version "7.13.12"
+  resolved "https://registry.yarnpkg.com/@babel/helper-module-imports/-/helper-module-imports-7.13.12.tgz#c6a369a6f3621cb25da014078684da9196b61977"
+  integrity sha512-4cVvR2/1B693IuOvSI20xqqa/+bl7lqAMR59R4iu39R9aOX8/JoYY1sFaNvUMyMBGnHdwvJgUrzNLoUZxXypxA==
+  dependencies:
+    "@babel/types" "^7.13.12"
+
+"@babel/helper-plugin-utils@^7.13.0":
+  version "7.13.0"
+  resolved "https://registry.yarnpkg.com/@babel/helper-plugin-utils/-/helper-plugin-utils-7.13.0.tgz#806526ce125aed03373bc416a828321e3a6a33af"
+  integrity sha512-ZPafIPSwzUlAoWT8DKs1W2VyF2gOWthGd5NGFMsBcMMol+ZhK+EQY/e6V96poa6PA/Bh+C9plWN0hXO1uB8AfQ==
+
+"@babel/helper-split-export-declaration@^7.12.13":
+  version "7.12.13"
+  resolved "https://registry.yarnpkg.com/@babel/helper-split-export-declaration/-/helper-split-export-declaration-7.12.13.tgz#e9430be00baf3e88b0e13e6f9d4eaf2136372b05"
+  integrity sha512-tCJDltF83htUtXx5NLcaDqRmknv652ZWCHyoTETf1CXYJdPC7nohZohjUgieXhv0hTJdRf2FjDueFehdNucpzg==
+  dependencies:
+    "@babel/types" "^7.12.13"
+
+"@babel/helper-validator-identifier@^7.14.0":
+  version "7.14.0"
+  resolved "https://registry.yarnpkg.com/@babel/helper-validator-identifier/-/helper-validator-identifier-7.14.0.tgz#d26cad8a47c65286b15df1547319a5d0bcf27288"
+  integrity sha512-V3ts7zMSu5lfiwWDVWzRDGIN+lnCEUdaXgtVHJgLb1rGaA6jMrtB9EmE7L18foXJIE8Un/A/h6NJfGQp/e1J4A==
+
+"@babel/helper-validator-option@^7.12.17":
+  version "7.12.17"
+  resolved "https://registry.yarnpkg.com/@babel/helper-validator-option/-/helper-validator-option-7.12.17.tgz#d1fbf012e1a79b7eebbfdc6d270baaf8d9eb9831"
+  integrity sha512-TopkMDmLzq8ngChwRlyjR6raKD6gMSae4JdYDB8bByKreQgG0RBTuKe9LRxW3wFtUnjxOPRKBDwEH6Mg5KeDfw==
+
+"@babel/highlight@^7.12.13":
+  version "7.14.0"
+  resolved "https://registry.yarnpkg.com/@babel/highlight/-/highlight-7.14.0.tgz#3197e375711ef6bf834e67d0daec88e4f46113cf"
+  integrity sha512-YSCOwxvTYEIMSGaBQb5kDDsCopDdiUGsqpatp3fOlI4+2HQSkTmEVWnVuySdAC5EWCqSWWTv0ib63RjR7dTBdg==
+  dependencies:
+    "@babel/helper-validator-identifier" "^7.14.0"
+    chalk "^2.0.0"
+    js-tokens "^4.0.0"
+
+"@babel/parser@^7.12.13", "@babel/parser@^7.14.0":
+  version "7.14.1"
+  resolved "https://registry.yarnpkg.com/@babel/parser/-/parser-7.14.1.tgz#1bd644b5db3f5797c4479d89ec1817fe02b84c47"
+  integrity sha512-muUGEKu8E/ftMTPlNp+mc6zL3E9zKWmF5sDHZ5MSsoTP9Wyz64AhEf9kD08xYJ7w6Hdcu8H550ircnPyWSIF0Q==
+
+"@babel/plugin-transform-runtime@^7.5.5":
+  version "7.13.15"
+  resolved "https://registry.yarnpkg.com/@babel/plugin-transform-runtime/-/plugin-transform-runtime-7.13.15.tgz#2eddf585dd066b84102517e10a577f24f76a9cd7"
+  integrity sha512-d+ezl76gx6Jal08XngJUkXM4lFXK/5Ikl9Mh4HKDxSfGJXmZ9xG64XT2oivBzfxb/eQ62VfvoMkaCZUKJMVrBA==
+  dependencies:
+    "@babel/helper-module-imports" "^7.13.12"
+    "@babel/helper-plugin-utils" "^7.13.0"
+    babel-plugin-polyfill-corejs2 "^0.2.0"
+    babel-plugin-polyfill-corejs3 "^0.2.0"
+    babel-plugin-polyfill-regenerator "^0.2.0"
+    semver "^6.3.0"
+
+"@babel/runtime@^7.5.5":
+  version "7.14.0"
+  resolved "https://registry.yarnpkg.com/@babel/runtime/-/runtime-7.14.0.tgz#46794bc20b612c5f75e62dd071e24dfd95f1cbe6"
+  integrity sha512-JELkvo/DlpNdJ7dlyw/eY7E0suy5i5GQH+Vlxaq1nsNJ+H7f4Vtv3jMeCEgRhZZQFXTjldYfQgv2qmM6M1v5wA==
+  dependencies:
+    regenerator-runtime "^0.13.4"
+
+"@babel/template@^7.12.13":
+  version "7.12.13"
+  resolved "https://registry.yarnpkg.com/@babel/template/-/template-7.12.13.tgz#530265be8a2589dbb37523844c5bcb55947fb327"
+  integrity sha512-/7xxiGA57xMo/P2GVvdEumr8ONhFOhfgq2ihK3h1e6THqzTAkHbkXgB0xI9yeTfIUoH3+oAeHhqm/I43OTbbjA==
+  dependencies:
+    "@babel/code-frame" "^7.12.13"
+    "@babel/parser" "^7.12.13"
+    "@babel/types" "^7.12.13"
+
+"@babel/traverse@^7.13.0":
+  version "7.14.0"
+  resolved "https://registry.yarnpkg.com/@babel/traverse/-/traverse-7.14.0.tgz#cea0dc8ae7e2b1dec65f512f39f3483e8cc95aef"
+  integrity sha512-dZ/a371EE5XNhTHomvtuLTUyx6UEoJmYX+DT5zBCQN3McHemsuIaKKYqsc/fs26BEkHs/lBZy0J571LP5z9kQA==
+  dependencies:
+    "@babel/code-frame" "^7.12.13"
+    "@babel/generator" "^7.14.0"
+    "@babel/helper-function-name" "^7.12.13"
+    "@babel/helper-split-export-declaration" "^7.12.13"
+    "@babel/parser" "^7.14.0"
+    "@babel/types" "^7.14.0"
+    debug "^4.1.0"
+    globals "^11.1.0"
+
+"@babel/types@^7.12.13", "@babel/types@^7.13.12", "@babel/types@^7.14.0", "@babel/types@^7.14.1":
+  version "7.14.1"
+  resolved "https://registry.yarnpkg.com/@babel/types/-/types-7.14.1.tgz#095bd12f1c08ab63eff6e8f7745fa7c9cc15a9db"
+  integrity sha512-S13Qe85fzLs3gYRUnrpyeIrBJIMYv33qSTg1qoBwiG6nPKwUWAD9odSzWhEedpwOIzSEI6gbdQIWEMiCI42iBA==
+  dependencies:
+    "@babel/helper-validator-identifier" "^7.14.0"
+    to-fast-properties "^2.0.0"
+
+"@metamask/safe-event-emitter@^2.0.0":
+  version "2.0.0"
+  resolved "https://registry.yarnpkg.com/@metamask/safe-event-emitter/-/safe-event-emitter-2.0.0.tgz#af577b477c683fad17c619a78208cede06f9605c"
+  integrity sha512-/kSXhY692qiV1MXu6EeOZvg5nECLclxNXcKCxJ3cXQgYuRymRHpdx/t7JXfsK+JLjwA1e1c1/SBrlQYpusC29Q==
+
 "@sindresorhus/is@^0.14.0":
   version "0.14.0"
   resolved "https://registry.yarnpkg.com/@sindresorhus/is/-/is-0.14.0.tgz#9fb3a3cf3132328151f353de4632e01e52102bea"
@@ -98,6 +257,13 @@ ansi-styles@^2.2.1:
   resolved "https://registry.yarnpkg.com/ansi-styles/-/ansi-styles-2.2.1.tgz#b432dd3358b634cf75e1e4664368240533c1ddbe"
   integrity sha1-tDLdM1i2NM914eRmQ2gkBTPB3b4=
 
+ansi-styles@^3.2.1:
+  version "3.2.1"
+  resolved "https://registry.yarnpkg.com/ansi-styles/-/ansi-styles-3.2.1.tgz#41fbb20243e50b12be0f04b8dedbf07520ce841d"
+  integrity sha512-VT0ZI6kZRdTh8YyJw3SMbYm/u+NqfsAxEpWO0Pf9sq8/e94WxxOpPKx9FR1FlyCtOVDNOQ+8ntlqFxiRc+r5qA==
+  dependencies:
+    color-convert "^1.9.0"
+
 any-promise@1.3.0, any-promise@^1.3.0:
   version "1.3.0"
   resolved "https://registry.yarnpkg.com/any-promise/-/any-promise-1.3.0.tgz#abc6afeedcea52e809cdc0376aed3ce39635d17f"
@@ -146,6 +312,13 @@ async-limiter@~1.0.0:
   resolved "https://registry.yarnpkg.com/async-limiter/-/async-limiter-1.0.1.tgz#dd379e94f0db8310b08291f9d64c3209766617fd"
   integrity sha512-csOlWGAcRFJaI6m+F2WKdnMKr4HhdhFVBk0H/QbJFMCr+uO2kwohwXQPxw/9OCxp05r5ghVBFSyioixx3gfkNQ==
 
+async-mutex@^0.2.6:
+  version "0.2.6"
+  resolved "https://registry.yarnpkg.com/async-mutex/-/async-mutex-0.2.6.tgz#0d7a3deb978bc2b984d5908a2038e1ae2e54ff40"
+  integrity sha512-Hs4R+4SPgamu6rSGW8C7cV9gaWUKEHykfzCCvIRuaVv636Ju10ZdeUbvb4TBEW0INuq2DHZqXbK4Nd3yG4RaRw==
+  dependencies:
+    tslib "^2.0.0"
+
 async@^1.4.2:
   version "1.5.2"
   resolved "https://registry.yarnpkg.com/async/-/async-1.5.2.tgz#ec6a61ae56480c0c3cb241c95618e20892f9672a"
@@ -348,6 +521,30 @@ babel-plugin-check-es2015-constants@^6.22.0:
   dependencies:
     babel-runtime "^6.22.0"
 
+babel-plugin-polyfill-corejs2@^0.2.0:
+  version "0.2.0"
+  resolved "https://registry.yarnpkg.com/babel-plugin-polyfill-corejs2/-/babel-plugin-polyfill-corejs2-0.2.0.tgz#686775bf9a5aa757e10520903675e3889caeedc4"
+  integrity sha512-9bNwiR0dS881c5SHnzCmmGlMkJLl0OUZvxrxHo9w/iNoRuqaPjqlvBf4HrovXtQs/au5yKkpcdgfT1cC5PAZwg==
+  dependencies:
+    "@babel/compat-data" "^7.13.11"
+    "@babel/helper-define-polyfill-provider" "^0.2.0"
+    semver "^6.1.1"
+
+babel-plugin-polyfill-corejs3@^0.2.0:
+  version "0.2.0"
+  resolved "https://registry.yarnpkg.com/babel-plugin-polyfill-corejs3/-/babel-plugin-polyfill-corejs3-0.2.0.tgz#f4b4bb7b19329827df36ff56f6e6d367026cb7a2"
+  integrity sha512-zZyi7p3BCUyzNxLx8KV61zTINkkV65zVkDAFNZmrTCRVhjo1jAS+YLvDJ9Jgd/w2tsAviCwFHReYfxO3Iql8Yg==
+  dependencies:
+    "@babel/helper-define-polyfill-provider" "^0.2.0"
+    core-js-compat "^3.9.1"
+
+babel-plugin-polyfill-regenerator@^0.2.0:
+  version "0.2.0"
+  resolved "https://registry.yarnpkg.com/babel-plugin-polyfill-regenerator/-/babel-plugin-polyfill-regenerator-0.2.0.tgz#853f5f5716f4691d98c84f8069c7636ea8da7ab8"
+  integrity sha512-J7vKbCuD2Xi/eEHxquHN14bXAW9CXtecwuLrOIDJtcZzTaPzV1VdEfoUf9AzcRBMolKUQKM9/GVojeh0hFiqMg==
+  dependencies:
+    "@babel/helper-define-polyfill-provider" "^0.2.0"
+
 babel-plugin-syntax-async-functions@^6.8.0:
   version "6.13.0"
   resolved "https://registry.yarnpkg.com/babel-plugin-syntax-async-functions/-/babel-plugin-syntax-async-functions-6.13.0.tgz#cad9cad1191b5ad634bf30ae0872391e0647be95"
@@ -860,6 +1057,17 @@ browserslist@^3.2.6:
     caniuse-lite "^1.0.30000844"
     electron-to-chromium "^1.3.47"
 
+browserslist@^4.14.5, browserslist@^4.16.6:
+  version "4.16.6"
+  resolved "https://registry.yarnpkg.com/browserslist/-/browserslist-4.16.6.tgz#d7901277a5a88e554ed305b183ec9b0c08f66fa2"
+  integrity sha512-Wspk/PqO+4W9qp5iUTJsa1B/QrYn1keNCcEP5OvP7WBwT4KaDly0uONYmC6Xa3Z5IqnUgS0KcgLYu1l74x0ZXQ==
+  dependencies:
+    caniuse-lite "^1.0.30001219"
+    colorette "^1.2.2"
+    electron-to-chromium "^1.3.723"
+    escalade "^3.1.1"
+    node-releases "^1.1.71"
+
 bs58@^2.0.1:
   version "2.0.1"
   resolved "https://registry.yarnpkg.com/bs58/-/bs58-2.0.1.tgz#55908d58f1982aba2008fa1bed8f91998a29bf8d"
@@ -881,6 +1089,11 @@ bs58check@^2.1.2:
     create-hash "^1.1.0"
     safe-buffer "^5.1.2"
 
+btoa@^1.2.1:
+  version "1.2.1"
+  resolved "https://registry.yarnpkg.com/btoa/-/btoa-1.2.1.tgz#01a9909f8b2c93f6bf680ba26131eb30f7fa3d73"
+  integrity sha512-SB4/MIGlsiVkMcHmT+pSmIPoNDoHg+7cMzmt3Uxt628MTz2487DKSqK/fuhFBrkuqrYv5UCEnACpF4dTFNKc/g==
+
 buffer-alloc-unsafe@^1.1.0:
   version "1.1.0"
   resolved "https://registry.yarnpkg.com/buffer-alloc-unsafe/-/buffer-alloc-unsafe-1.1.0.tgz#bd7dc26ae2972d0eda253be061dba992349c19f0"
@@ -950,6 +1163,11 @@ caniuse-lite@^1.0.30000844:
   resolved "https://registry.yarnpkg.com/caniuse-lite/-/caniuse-lite-1.0.30001025.tgz#30336a8aca7f98618eb3cf38e35184e13d4e5fe6"
   integrity sha512-SKyFdHYfXUZf5V85+PJgLYyit27q4wgvZuf8QTOk1osbypcROihMBlx9GRar2/pIcKH2r4OehdlBr9x6PXetAQ==
 
+caniuse-lite@^1.0.30001219:
+  version "1.0.30001228"
+  resolved "https://registry.yarnpkg.com/caniuse-lite/-/caniuse-lite-1.0.30001228.tgz#bfdc5942cd3326fa51ee0b42fbef4da9d492a7fa"
+  integrity sha512-QQmLOGJ3DEgokHbMSA8cj2a+geXqmnpyOFT0lhQV6P3/YOJvGDEwoedcwxEQ30gJIwIIunHIicunJ2rzK5gB2A==
+
 caseless@~0.12.0:
   version "0.12.0"
   resolved "https://registry.yarnpkg.com/caseless/-/caseless-0.12.0.tgz#1b681c21ff84033c826543090689420d187151dc"
@@ -966,6 +1184,15 @@ chalk@^1.1.3:
     strip-ansi "^3.0.0"
     supports-color "^2.0.0"
 
+chalk@^2.0.0:
+  version "2.4.2"
+  resolved "https://registry.yarnpkg.com/chalk/-/chalk-2.4.2.tgz#cd42541677a54333cf541a49108c1432b44c9424"
+  integrity sha512-Mti+f9lpJNcwF4tWV8/OrTTtF1gZi+f8FqlyAdouralcFWFQWF2+NgCHShjkCb+IFBLq9buZwE1xckQU4peSuQ==
+  dependencies:
+    ansi-styles "^3.2.1"
+    escape-string-regexp "^1.0.5"
+    supports-color "^5.3.0"
+
 checkpoint-store@^1.1.0:
   version "1.1.0"
   resolved "https://registry.yarnpkg.com/checkpoint-store/-/checkpoint-store-1.1.0.tgz#04e4cb516b91433893581e6d4601a78e9552ea06"
@@ -993,7 +1220,7 @@ clone-response@^1.0.2:
   dependencies:
     mimic-response "^1.0.0"
 
-clone@^2.0.0:
+clone@^2.0.0, clone@^2.1.1:
   version "2.1.2"
   resolved "https://registry.yarnpkg.com/clone/-/clone-2.1.2.tgz#1b7f4b9f591f1e8f83670401600345a02887435f"
   integrity sha1-G39Ln1kfHo+DZwQBYANFoCiHQ18=
@@ -1006,6 +1233,23 @@ coinstring@^2.0.0:
     bs58 "^2.0.1"
     create-hash "^1.1.1"
 
+color-convert@^1.9.0:
+  version "1.9.3"
+  resolved "https://registry.yarnpkg.com/color-convert/-/color-convert-1.9.3.tgz#bb71850690e1f136567de629d2d5471deda4c1e8"
+  integrity sha512-QfAUtd+vFdAtFQcC8CCyYt1fYWxSqAiK2cSD6zDB8N3cpsEBAvRxp9zOGg6G/SHHJYAT88/az/IuDGALsNVbGg==
+  dependencies:
+    color-name "1.1.3"
+
+color-name@1.1.3:
+  version "1.1.3"
+  resolved "https://registry.yarnpkg.com/color-name/-/color-name-1.1.3.tgz#a7d0558bd89c42f795dd42328f740831ca53bc25"
+  integrity sha1-p9BVi9icQveV3UIyj3QIMcpTvCU=
+
+colorette@^1.2.2:
+  version "1.2.2"
+  resolved "https://registry.yarnpkg.com/colorette/-/colorette-1.2.2.tgz#cbcc79d5e99caea2dbf10eb3a26fd8b3e6acfa94"
+  integrity sha512-MKGMzyfeuutC/ZJ1cba9NqcNpfeqMUcYmyF1ZFY6/Cn7CNSAKx6a+s48sqLqyAiZuaP2TcqMhoo+dlwFnVxT9w==
+
 combined-stream@^1.0.6, combined-stream@~1.0.6:
   version "1.0.8"
   resolved "https://registry.yarnpkg.com/combined-stream/-/combined-stream-1.0.8.tgz#c3d45a8b34fd730631a110a8a2520682b31d5a7f"
@@ -1069,6 +1313,14 @@ cookiejar@^2.1.1:
   resolved "https://registry.yarnpkg.com/cookiejar/-/cookiejar-2.1.2.tgz#dd8a235530752f988f9a0844f3fc589e3111125c"
   integrity sha512-Mw+adcfzPxcPeI+0WlvRrr/3lGVO0bD75SxX6811cxSh1Wbxx7xZBGK1eVtDf6si8rg2lhnUjsVLMFMfbRIuwA==
 
+core-js-compat@^3.9.1:
+  version "3.12.1"
+  resolved "https://registry.yarnpkg.com/core-js-compat/-/core-js-compat-3.12.1.tgz#2c302c4708505fa7072b0adb5156d26f7801a18b"
+  integrity sha512-i6h5qODpw6EsHAoIdQhKoZdWn+dGBF3dSS8m5tif36RlWvW3A6+yu2S16QHUo3CrkzrnEskMAt9f8FxmY9fhWQ==
+  dependencies:
+    browserslist "^4.16.6"
+    semver "7.0.0"
+
 core-js@^2.4.0, core-js@^2.5.0:
   version "2.6.11"
   resolved "https://registry.yarnpkg.com/core-js/-/core-js-2.6.11.tgz#38831469f9922bded8ee21c9dc46985e0399308c"
@@ -1165,6 +1417,13 @@ debug@2.6.9, debug@^2.2.0, debug@^2.6.8, debug@^2.6.9:
   dependencies:
     ms "2.0.0"
 
+debug@^4.1.0, debug@^4.1.1:
+  version "4.3.1"
+  resolved "https://registry.yarnpkg.com/debug/-/debug-4.3.1.tgz#f0d229c505e0c6d8c49ac553d1b13dc183f6b2ee"
+  integrity sha512-doEwdvm4PCeK4K3RQN2ZC2BYUBaxwLARCqZmMjtF8a51J2Rb0xpVloFRnCODwqjpwnAoao4pelN8l3RJdv3gRQ==
+  dependencies:
+    ms "2.1.2"
+
 decode-uri-component@^0.2.0:
   version "0.2.0"
   resolved "https://registry.yarnpkg.com/decode-uri-component/-/decode-uri-component-0.2.0.tgz#eb3913333458775cb84cd1a1fae062106bb87545"
@@ -1349,6 +1608,11 @@ electron-to-chromium@^1.3.47:
   resolved "https://registry.yarnpkg.com/electron-to-chromium/-/electron-to-chromium-1.3.345.tgz#2569d0d54a64ef0f32a4b7e8c80afa5fe57c5d98"
   integrity sha512-f8nx53+Z9Y+SPWGg3YdHrbYYfIJAtbUjpFfW4X1RwTZ94iUG7geg9tV8HqzAXX7XTNgyWgAFvce4yce8ZKxKmg==
 
+electron-to-chromium@^1.3.723:
+  version "1.3.727"
+  resolved "https://registry.yarnpkg.com/electron-to-chromium/-/electron-to-chromium-1.3.727.tgz#857e310ca00f0b75da4e1db6ff0e073cc4a91ddf"
+  integrity sha512-Mfz4FIB4FSvEwBpDfdipRIrwd6uo8gUDoRDF4QEYb4h4tSuI3ov594OrjU6on042UlFHouIJpClDODGkPcBSbg==
+
 elliptic@6.3.3:
   version "6.3.3"
   resolved "https://registry.yarnpkg.com/elliptic/-/elliptic-6.3.3.tgz#5482d9646d54bcb89fd7d994fc9e2e9568876e3f"
@@ -1450,12 +1714,17 @@ es6-symbol@^3.1.1, es6-symbol@~3.1.3:
     d "^1.0.1"
     ext "^1.1.2"
 
+escalade@^3.1.1:
+  version "3.1.1"
+  resolved "https://registry.yarnpkg.com/escalade/-/escalade-3.1.1.tgz#d8cfdc7000965c5a0174b4a82eaa5c0552742e40"
+  integrity sha512-k0er2gUkLf8O0zKJiAhmkTnJlTvINGv7ygDNPbeIsX/TJjGJZHuh9B2UxbsaEkmlEo9MfhrSzmhIlhRlI2GXnw==
+
 escape-html@~1.0.3:
   version "1.0.3"
   resolved "https://registry.yarnpkg.com/escape-html/-/escape-html-1.0.3.tgz#0258eae4d3d0c0974de1c169188ef0051d1d1988"
   integrity sha1-Aljq5NPQwJdN4cFpGI7wBR0dGYg=
 
-escape-string-regexp@^1.0.2:
+escape-string-regexp@^1.0.2, escape-string-regexp@^1.0.5:
   version "1.0.5"
   resolved "https://registry.yarnpkg.com/escape-string-regexp/-/escape-string-regexp-1.0.5.tgz#1b61c0562190a8dff6ae3bb2cf0200ca130b86d4"
   integrity sha1-G2HAViGQqN/2rjuyzwIAyhMLhtQ=
@@ -1470,18 +1739,17 @@ etag@~1.8.1:
   resolved "https://registry.yarnpkg.com/etag/-/etag-1.8.1.tgz#41ae2eeb65efa62268aebfea83ac7d79299b0887"
   integrity sha1-Qa4u62XvpiJorr/qg6x9eSmbCIc=
 
-eth-block-tracker@^3.0.0:
-  version "3.0.1"
-  resolved "https://registry.yarnpkg.com/eth-block-tracker/-/eth-block-tracker-3.0.1.tgz#95cd5e763c7293e0b1b2790a2a39ac2ac188a5e1"
-  integrity sha512-WUVxWLuhMmsfenfZvFO5sbl1qFY2IqUlw/FPVmjjdElpqLsZtSG+wPe9Dz7W/sB6e80HgFKknOmKk2eNlznHug==
+eth-block-tracker@^4.2.0:
+  version "4.4.3"
+  resolved "https://registry.yarnpkg.com/eth-block-tracker/-/eth-block-tracker-4.4.3.tgz#766a0a0eb4a52c867a28328e9ae21353812cf626"
+  integrity sha512-A8tG4Z4iNg4mw5tP1Vung9N9IjgMNqpiMoJ/FouSFwNCGHv2X0mmOYwtQOJzki6XN7r7Tyo01S29p7b224I4jw==
   dependencies:
+    "@babel/plugin-transform-runtime" "^7.5.5"
+    "@babel/runtime" "^7.5.5"
     eth-query "^2.1.0"
-    ethereumjs-tx "^1.3.3"
-    ethereumjs-util "^5.1.3"
-    ethjs-util "^0.1.3"
-    json-rpc-engine "^3.6.0"
-    pify "^2.3.0"
-    tape "^4.6.3"
+    json-rpc-random-id "^1.0.1"
+    pify "^3.0.0"
+    safe-event-emitter "^1.0.1"
 
 eth-ens-namehash@2.0.8:
   version "2.0.8"
@@ -1491,6 +1759,25 @@ eth-ens-namehash@2.0.8:
     idna-uts46-hx "^2.3.1"
     js-sha3 "^0.5.7"
 
+eth-json-rpc-errors@^1.0.1:
+  version "1.1.1"
+  resolved "https://registry.yarnpkg.com/eth-json-rpc-errors/-/eth-json-rpc-errors-1.1.1.tgz#148377ef55155585981c21ff574a8937f9d6991f"
+  integrity sha512-WT5shJ5KfNqHi9jOZD+ID8I1kuYWNrigtZat7GOQkvwo99f8SzAVaEcWhJUv656WiZOAg3P1RiJQANtUmDmbIg==
+  dependencies:
+    fast-safe-stringify "^2.0.6"
+
+eth-json-rpc-filters@^4.0.2:
+  version "4.2.2"
+  resolved "https://registry.yarnpkg.com/eth-json-rpc-filters/-/eth-json-rpc-filters-4.2.2.tgz#eb35e1dfe9357ace8a8908e7daee80b2cd60a10d"
+  integrity sha512-DGtqpLU7bBg63wPMWg1sCpkKCf57dJ+hj/k3zF26anXMzkmtSBDExL8IhUu7LUd34f0Zsce3PYNO2vV2GaTzaw==
+  dependencies:
+    "@metamask/safe-event-emitter" "^2.0.0"
+    async-mutex "^0.2.6"
+    eth-json-rpc-middleware "^6.0.0"
+    eth-query "^2.1.2"
+    json-rpc-engine "^6.1.0"
+    pify "^5.0.0"
+
 eth-json-rpc-infura@^3.1.0:
   version "3.2.1"
   resolved "https://registry.yarnpkg.com/eth-json-rpc-infura/-/eth-json-rpc-infura-3.2.1.tgz#26702a821067862b72d979c016fd611502c6057f"
@@ -1520,6 +1807,43 @@ eth-json-rpc-middleware@^1.5.0:
     promise-to-callback "^1.0.0"
     tape "^4.6.3"
 
+eth-json-rpc-middleware@^4.1.1:
+  version "4.4.1"
+  resolved "https://registry.yarnpkg.com/eth-json-rpc-middleware/-/eth-json-rpc-middleware-4.4.1.tgz#07d3dd0724c24a8d31e4a172ee96271da71b4228"
+  integrity sha512-yoSuRgEYYGFdVeZg3poWOwAlRI+MoBIltmOB86MtpoZjvLbou9EB/qWMOWSmH2ryCWLW97VYY6NWsmWm3OAA7A==
+  dependencies:
+    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"
+
+eth-json-rpc-middleware@^6.0.0:
+  version "6.0.0"
+  resolved "https://registry.yarnpkg.com/eth-json-rpc-middleware/-/eth-json-rpc-middleware-6.0.0.tgz#4fe16928b34231a2537856f08a5ebbc3d0c31175"
+  integrity sha512-qqBfLU2Uq1Ou15Wox1s+NX05S9OcAEL4JZ04VZox2NS0U+RtCMjSxzXhLFWekdShUPZ+P8ax3zCO2xcPrp6XJQ==
+  dependencies:
+    btoa "^1.2.1"
+    clone "^2.1.1"
+    eth-query "^2.1.2"
+    eth-rpc-errors "^3.0.0"
+    eth-sig-util "^1.4.2"
+    ethereumjs-util "^5.1.2"
+    json-rpc-engine "^5.3.0"
+    json-stable-stringify "^1.0.1"
+    node-fetch "^2.6.1"
+    pify "^3.0.0"
+    safe-event-emitter "^1.0.1"
+
 eth-lib@0.2.7:
   version "0.2.7"
   resolved "https://registry.yarnpkg.com/eth-lib/-/eth-lib-0.2.7.tgz#2f93f17b1e23aec3759cd4a3fe20c1286a3fc1ca"
@@ -1549,6 +1873,20 @@ eth-query@^2.0.2, eth-query@^2.1.0, eth-query@^2.1.2:
     json-rpc-random-id "^1.0.0"
     xtend "^4.0.1"
 
+eth-rpc-errors@^3.0.0:
+  version "3.0.0"
+  resolved "https://registry.yarnpkg.com/eth-rpc-errors/-/eth-rpc-errors-3.0.0.tgz#d7b22653c70dbf9defd4ef490fd08fe70608ca10"
+  integrity sha512-iPPNHPrLwUlR9xCSYm7HHQjWBasor3+KZfRvwEWxMz3ca0yqnlBeJrnyphkGIXZ4J7AMAaOLmwy4AWhnxOiLxg==
+  dependencies:
+    fast-safe-stringify "^2.0.6"
+
+eth-rpc-errors@^4.0.2:
+  version "4.0.3"
+  resolved "https://registry.yarnpkg.com/eth-rpc-errors/-/eth-rpc-errors-4.0.3.tgz#6ddb6190a4bf360afda82790bb7d9d5e724f423a"
+  integrity sha512-Z3ymjopaoft7JDoxZcEb3pwdGh7yiYMhOwm2doUt6ASXlMavpNlK6Cre0+IMl2VSGyEU9rkiperQhp5iRxn5Pg==
+  dependencies:
+    fast-safe-stringify "^2.0.6"
+
 eth-sig-util@^1.4.2:
   version "1.4.2"
   resolved "https://registry.yarnpkg.com/eth-sig-util/-/eth-sig-util-1.4.2.tgz#8d958202c7edbaae839707fba6f09ff327606210"
@@ -1631,7 +1969,7 @@ ethereumjs-common@^1.1.0, ethereumjs-common@^1.5.0:
   resolved "https://registry.yarnpkg.com/ethereumjs-common/-/ethereumjs-common-1.5.0.tgz#d3e82fc7c47c0cef95047f431a99485abc9bb1cd"
   integrity sha512-SZOjgK1356hIY7MRj3/ma5qtfr/4B5BL+G4rP/XSMYr2z1H5el4RX5GReYCKmQmYI/nSBmRnwrZ17IfHuG0viQ==
 
-ethereumjs-tx@^1.0.0, ethereumjs-tx@^1.1.1, ethereumjs-tx@^1.2.0, ethereumjs-tx@^1.2.2, ethereumjs-tx@^1.3.3:
+ethereumjs-tx@^1.0.0, ethereumjs-tx@^1.1.1, ethereumjs-tx@^1.2.0, ethereumjs-tx@^1.2.2, ethereumjs-tx@^1.3.3, ethereumjs-tx@^1.3.7:
   version "1.3.7"
   resolved "https://registry.yarnpkg.com/ethereumjs-tx/-/ethereumjs-tx-1.3.7.tgz#88323a2d875b10549b8347e09f4862b546f3d89a"
   integrity sha512-wvLMxzt1RPhAQ9Yi3/HKZTn0FZYpnsmQdbKYfUUpi4j1SEIcbkd9tndVjcPrufY3V7j2IebOpC00Zp2P/Ay2kA==
@@ -1647,7 +1985,7 @@ ethereumjs-tx@^2.1.1:
     ethereumjs-common "^1.5.0"
     ethereumjs-util "^6.0.0"
 
-ethereumjs-util@^5.0.0, ethereumjs-util@^5.0.1, ethereumjs-util@^5.1.1, ethereumjs-util@^5.1.2, ethereumjs-util@^5.1.3, ethereumjs-util@^5.1.5:
+ethereumjs-util@^5.0.0, ethereumjs-util@^5.0.1, ethereumjs-util@^5.1.1, ethereumjs-util@^5.1.2, ethereumjs-util@^5.1.5:
   version "5.2.0"
   resolved "https://registry.yarnpkg.com/ethereumjs-util/-/ethereumjs-util-5.2.0.tgz#3e0c0d1741471acf1036052d048623dee54ad642"
   integrity sha512-CJAKdI0wgMbQFLlLRtZKGcy/L6pzVRgelIZqRqNbuVFM3K9VEnyfbcvz0ncWMRNCe4kaHWjwRYQcYMucmwsnWA==
@@ -1830,6 +2168,11 @@ fast-json-stable-stringify@^2.0.0:
   resolved "https://registry.yarnpkg.com/fast-json-stable-stringify/-/fast-json-stable-stringify-2.1.0.tgz#874bf69c6f404c2b5d99c481341399fd55892633"
   integrity sha512-lhd/wF+Lk98HZoTCtlVraHtfh5XYijIjalXck7saUtuanSDyLMxnHhSXEDJqHxD7msR8D0uCmqlkwjCV8xvwHw==
 
+fast-safe-stringify@^2.0.6:
+  version "2.0.7"
+  resolved "https://registry.yarnpkg.com/fast-safe-stringify/-/fast-safe-stringify-2.0.7.tgz#124aa885899261f68aedb42a7c080de9da608743"
+  integrity sha512-Utm6CdzT+6xsDk2m8S6uL8VHxNwI6Jub+e9NYTcAms28T84pTa25GJQV9j0CY0N1rM8hK4x6grpF2BQf+2qwVA==
+
 fd-slicer@~1.1.0:
   version "1.1.0"
   resolved "https://registry.yarnpkg.com/fd-slicer/-/fd-slicer-1.1.0.tgz#25c7c89cb1f9077f8891bbe61d8f390eae256f1e"
@@ -1998,6 +2341,11 @@ global@~4.3.0:
     min-document "^2.19.0"
     process "~0.5.1"
 
+globals@^11.1.0:
+  version "11.12.0"
+  resolved "https://registry.yarnpkg.com/globals/-/globals-11.12.0.tgz#ab8795338868a0babd8525758018c2a7eb95c42e"
+  integrity sha512-WOBp/EEGUiIsJSp7wcv/y6MO+lV9UoncWqxuFfm8eBwzWNgyfBd6Gz+IeKQ9jCmyhoH99g15M3T+QaVHFjizVA==
+
 globals@^9.18.0:
   version "9.18.0"
   resolved "https://registry.yarnpkg.com/globals/-/globals-9.18.0.tgz#aa3896b3e69b487f17e31ed2143d69a8e30c2d8a"
@@ -2070,6 +2418,11 @@ has-ansi@^2.0.0:
   dependencies:
     ansi-regex "^2.0.0"
 
+has-flag@^3.0.0:
+  version "3.0.0"
+  resolved "https://registry.yarnpkg.com/has-flag/-/has-flag-3.0.0.tgz#b5d454dc2199ae225699f3467e5a07f3b955bafd"
+  integrity sha1-tdRU3CGZriJWmfNGfloH87lVuv0=
+
 has-symbol-support-x@^1.4.1:
   version "1.4.2"
   resolved "https://registry.yarnpkg.com/has-symbol-support-x/-/has-symbol-support-x-1.4.2.tgz#1409f98bc00247da45da67cee0a36f282ff26455"
@@ -2249,6 +2602,13 @@ is-callable@^1.1.3, is-callable@^1.1.4, is-callable@^1.1.5:
   resolved "https://registry.yarnpkg.com/is-callable/-/is-callable-1.1.5.tgz#f7e46b596890456db74e7f6e976cb3273d06faab"
   integrity sha512-ESKv5sMCJB2jnHTWZ3O5itG+O128Hsus4K4Qh1h2/cgn2vbgnLSVqfV46AeJA9D5EeeLa9w81KUXMtn34zhX+Q==
 
+is-core-module@^2.2.0:
+  version "2.4.0"
+  resolved "https://registry.yarnpkg.com/is-core-module/-/is-core-module-2.4.0.tgz#8e9fc8e15027b011418026e98f0e6f4d86305cc1"
+  integrity sha512-6A2fkfq1rfeQZjxrZJGerpLCTHRNEBiSgnu0+obeJpEPZRUooHgsizvzv0ZjJwOz3iWIHdJtVWJ/tmPr3D21/A==
+  dependencies:
+    has "^1.0.3"
+
 is-date-object@^1.0.1:
   version "1.0.2"
   resolved "https://registry.yarnpkg.com/is-date-object/-/is-date-object-1.0.2.tgz#bda736f2cd8fd06d32844e7743bfa7494c3bfd7e"
@@ -2346,7 +2706,7 @@ js-sha3@0.5.7, js-sha3@^0.5.7:
   resolved "https://registry.yarnpkg.com/js-sha3/-/js-sha3-0.5.7.tgz#0d4ffd8002d5333aabaf4a23eed2f6374c9f28e7"
   integrity sha1-DU/9gALVMzqrr0oj7tL2N0yfKOc=
 
-"js-tokens@^3.0.0 || ^4.0.0":
+"js-tokens@^3.0.0 || ^4.0.0", js-tokens@^4.0.0:
   version "4.0.0"
   resolved "https://registry.yarnpkg.com/js-tokens/-/js-tokens-4.0.0.tgz#19203fb59991df98e3a287050d4647cdeaf32499"
   integrity sha512-RdJUflcE3cUzKiMqQgsCu06FPu9UdIJO0beYbPhHN4k6apgJtifcoCtT9bcxOpYBtpD2kCM6Sbzg4CausW/PKQ==
@@ -2366,6 +2726,11 @@ jsesc@^1.3.0:
   resolved "https://registry.yarnpkg.com/jsesc/-/jsesc-1.3.0.tgz#46c3fec8c1892b12b0833db9bc7622176dbab34b"
   integrity sha1-RsP+yMGJKxKwgz25vHYiF226s0s=
 
+jsesc@^2.5.1:
+  version "2.5.2"
+  resolved "https://registry.yarnpkg.com/jsesc/-/jsesc-2.5.2.tgz#80564d2e483dacf6e8ef209650a67df3f0c283a4"
+  integrity sha512-OYu7XEzjkCQ3C5Ps3QIZsQfNpqoJyZZA99wd9aWd05NCtC5pWOkShK2mkL6HXQR6/Cy2lbNdPlZBpuQHXE63gA==
+
 jsesc@~0.5.0:
   version "0.5.0"
   resolved "https://registry.yarnpkg.com/jsesc/-/jsesc-0.5.0.tgz#e7dee66e35d6fc16f710fe91d5cf69f70f08911d"
@@ -2388,6 +2753,22 @@ json-rpc-engine@^3.4.0, json-rpc-engine@^3.6.0:
     promise-to-callback "^1.0.0"
     safe-event-emitter "^1.0.1"
 
+json-rpc-engine@^5.1.3, json-rpc-engine@^5.3.0:
+  version "5.4.0"
+  resolved "https://registry.yarnpkg.com/json-rpc-engine/-/json-rpc-engine-5.4.0.tgz#75758609d849e1dba1e09021ae473f3ab63161e5"
+  integrity sha512-rAffKbPoNDjuRnXkecTjnsE3xLLrb00rEkdgalINhaYVYIxDwWtvYBr9UFbhTvPB1B2qUOLoFd/cV6f4Q7mh7g==
+  dependencies:
+    eth-rpc-errors "^3.0.0"
+    safe-event-emitter "^1.0.1"
+
+json-rpc-engine@^6.1.0:
+  version "6.1.0"
+  resolved "https://registry.yarnpkg.com/json-rpc-engine/-/json-rpc-engine-6.1.0.tgz#bf5ff7d029e1c1bf20cb6c0e9f348dcd8be5a393"
+  integrity sha512-NEdLrtrq1jUZyfjkr9OCz9EzCNhnRyWtt1PAnvnhwy6e8XETS0Dtc+ZNCO2gvuAoKsIn2+vCSowXTYE4CkgnAQ==
+  dependencies:
+    "@metamask/safe-event-emitter" "^2.0.0"
+    eth-rpc-errors "^4.0.2"
+
 json-rpc-error@^2.0.0:
   version "2.0.0"
   resolved "https://registry.yarnpkg.com/json-rpc-error/-/json-rpc-error-2.0.0.tgz#a7af9c202838b5e905c7250e547f1aff77258a02"
@@ -2395,7 +2776,7 @@ json-rpc-error@^2.0.0:
   dependencies:
     inherits "^2.0.1"
 
-json-rpc-random-id@^1.0.0:
+json-rpc-random-id@^1.0.0, json-rpc-random-id@^1.0.1:
   version "1.0.1"
   resolved "https://registry.yarnpkg.com/json-rpc-random-id/-/json-rpc-random-id-1.0.1.tgz#ba49d96aded1444dbb8da3d203748acbbcdec8c8"
   integrity sha1-uknZat7RRE27jaPSA3SKy7zeyMg=
@@ -2526,15 +2907,20 @@ levelup@^1.2.1:
     semver "~5.4.1"
     xtend "~4.0.0"
 
+lodash.debounce@^4.0.8:
+  version "4.0.8"
+  resolved "https://registry.yarnpkg.com/lodash.debounce/-/lodash.debounce-4.0.8.tgz#82d79bff30a67c4005ffd5e2515300ad9ca4d7af"
+  integrity sha1-gteb/zCmfEAF/9XiUVMArZyk168=
+
 lodash.isequal@^4.5.0:
   version "4.5.0"
   resolved "https://registry.yarnpkg.com/lodash.isequal/-/lodash.isequal-4.5.0.tgz#415c4478f2bcc30120c22ce10ed3226f7d3e18e0"
   integrity sha1-QVxEePK8wwEgwizhDtMib30+GOA=
 
 lodash@^4.17.14, lodash@^4.17.4:
-  version "4.17.15"
-  resolved "https://registry.yarnpkg.com/lodash/-/lodash-4.17.15.tgz#b447f6670a0455bbfeedd11392eff330ea097548"
-  integrity sha512-8xOcRHvCjnocdS5cpwXQXVzmmh5e5+saE2QGoeQmbKmRS6J3VQppPOIt0MnmE+4xlZoumy0GPG0D0MVIQbNA1A==
+  version "4.17.21"
+  resolved "https://registry.yarnpkg.com/lodash/-/lodash-4.17.21.tgz#679591c564c3bffaae8454cf0b3df370c3d6911c"
+  integrity sha512-v2kDEe57lecTulaDIuNTPy3Ry4gLGJ6Z1O3vE1krgXZNrsQ+LFTGHVxVjcXPs17LhbZVGedAJv8XZ1tvj5FvSg==
 
 loose-envify@^1.0.0:
   version "1.4.0"
@@ -2728,6 +3114,11 @@ ms@2.1.1:
   resolved "https://registry.yarnpkg.com/ms/-/ms-2.1.1.tgz#30a5864eb3ebb0a66f2ebe6d727af06a09d86e0a"
   integrity sha512-tgp+dl5cGk28utYktBsrFqA7HKgrhgPsg6Z/EfhWI4gl1Hwq8B/GmY/0oXZ6nF8hDVesS/FpnYaD/kOWhYQvyg==
 
+ms@2.1.2:
+  version "2.1.2"
+  resolved "https://registry.yarnpkg.com/ms/-/ms-2.1.2.tgz#d09d1f357b443f493382a8eb3ccd183872ae6009"
+  integrity sha512-sGkPx+VjMtmA6MX27oA4FBFELFCZZ4S4XqeGOXCv68tT+jb3vk/RyaKWP0PTKyWtmLSM0b+adUTEvbs1PEaH2w==
+
 nan@^2.0.8, nan@^2.14.0, nan@^2.2.1:
   version "2.14.0"
   resolved "https://registry.yarnpkg.com/nan/-/nan-2.14.0.tgz#7818f722027b2459a86f0295d434d1fc2336c52c"
@@ -2753,6 +3144,11 @@ node-fetch@2.1.2:
   resolved "https://registry.yarnpkg.com/node-fetch/-/node-fetch-2.1.2.tgz#ab884e8e7e57e38a944753cec706f788d1768bb5"
   integrity sha1-q4hOjn5X44qUR1POxwb3iNF2i7U=
 
+node-fetch@^2.6.1:
+  version "2.6.1"
+  resolved "https://registry.yarnpkg.com/node-fetch/-/node-fetch-2.6.1.tgz#045bd323631f76ed2e2b55573394416b639a0052"
+  integrity sha512-V4aYg89jEoVRxRb2fJdAg8FHvI7cEyYdVAh94HH0UIK8oJxUfkjlDQN9RbMx+bEjP7+ggMiFRprSti032Oipxw==
+
 node-fetch@~1.7.1:
   version "1.7.3"
   resolved "https://registry.yarnpkg.com/node-fetch/-/node-fetch-1.7.3.tgz#980f6f72d85211a5347c6b2bc18c5b84c3eb47ef"
@@ -2761,6 +3157,11 @@ node-fetch@~1.7.1:
     encoding "^0.1.11"
     is-stream "^1.0.1"
 
+node-releases@^1.1.71:
+  version "1.1.71"
+  resolved "https://registry.yarnpkg.com/node-releases/-/node-releases-1.1.71.tgz#cb1334b179896b1c89ecfdd4b725fb7bbdfc7dbb"
+  integrity sha512-zR6HoT6LrLCRBwukmrVbHv0EpEQjksO6GmFcZQQuCAy139BEsoVKPYnf3jongYW83fAa1torLGYwxxky/p28sg==
+
 normalize-url@^4.1.0:
   version "4.5.0"
   resolved "https://registry.yarnpkg.com/normalize-url/-/normalize-url-4.5.0.tgz#453354087e6ca96957bd8f5baf753f5982142129"
@@ -2935,6 +3336,11 @@ pify@^3.0.0:
   resolved "https://registry.yarnpkg.com/pify/-/pify-3.0.0.tgz#e5a4acd2c101fdf3d9a4d07f0dbc4db49dd28176"
   integrity sha1-5aSs0sEB/fPZpNB/DbxNtJ3SgXY=
 
+pify@^5.0.0:
+  version "5.0.0"
+  resolved "https://registry.yarnpkg.com/pify/-/pify-5.0.0.tgz#1f5eca3f5e87ebec28cc6d54a0e4aaf00acc127f"
+  integrity sha512-eW/gHNMlxdSP6dmG6uJip6FXN0EQBwm2clYYd8Wul42Cwu/DK8HEftzsapcNdYe2MfLiIwZqsDk2RDEsTE79hA==
+
 pinkie-promise@^2.0.0:
   version "2.0.1"
   resolved "https://registry.yarnpkg.com/pinkie-promise/-/pinkie-promise-2.0.1.tgz#2135d6dfa7a358c069ac9b178776288228450ffa"
@@ -3135,6 +3541,11 @@ regenerator-runtime@^0.11.0:
   resolved "https://registry.yarnpkg.com/regenerator-runtime/-/regenerator-runtime-0.11.1.tgz#be05ad7f9bf7d22e056f9726cee5017fbf19e2e9"
   integrity sha512-MguG95oij0fC3QV3URf4V2SDYGJhJnJGqvIIgdECeODCT98wSWDAJ94SSuVpYQUoTcGUIL6L4yNB7j1DFFHSBg==
 
+regenerator-runtime@^0.13.4:
+  version "0.13.7"
+  resolved "https://registry.yarnpkg.com/regenerator-runtime/-/regenerator-runtime-0.13.7.tgz#cac2dacc8a1ea675feaabaeb8ae833898ae46f55"
+  integrity sha512-a54FxoJDIr27pgf7IgeQGxmqUNYrcV338lf/6gH456HZ/PhX+5BcwHXG9ajESmwe6WRO0tAzRUrRmNONWgkrew==
+
 regenerator-transform@^0.10.0:
   version "0.10.1"
   resolved "https://registry.yarnpkg.com/regenerator-transform/-/regenerator-transform-0.10.1.tgz#1e4996837231da8b7f3cf4114d71b5691a0680dd"
@@ -3206,6 +3617,14 @@ request@^2.79.0, request@^2.85.0:
     tunnel-agent "^0.6.0"
     uuid "^3.3.2"
 
+resolve@^1.14.2:
+  version "1.20.0"
+  resolved "https://registry.yarnpkg.com/resolve/-/resolve-1.20.0.tgz#629a013fb3f70755d6f0b7935cc1c2c5378b1975"
+  integrity sha512-wENBPt4ySzg4ybFQW2TT1zMQucPK95HSh/nq2CFTZVOGut2+pQvSsgtda4d26YrYcr067wjbmzOG8byDPBX63A==
+  dependencies:
+    is-core-module "^2.2.0"
+    path-parse "^1.0.6"
+
 resolve@~1.14.2:
   version "1.14.2"
   resolved "https://registry.yarnpkg.com/resolve/-/resolve-1.14.2.tgz#dbf31d0fa98b1f29aa5169783b9c290cb865fea2"
@@ -3333,11 +3752,21 @@ semver@6.2.0:
   resolved "https://registry.yarnpkg.com/semver/-/semver-6.2.0.tgz#4d813d9590aaf8a9192693d6c85b9344de5901db"
   integrity sha512-jdFC1VdUGT/2Scgbimf7FSx9iJLXoqfglSF+gJeuNWVpiE37OIbc1jywR/GJyFdz3mnkz2/id0L0J/cr0izR5A==
 
+semver@7.0.0:
+  version "7.0.0"
+  resolved "https://registry.yarnpkg.com/semver/-/semver-7.0.0.tgz#5f3ca35761e47e05b206c6daff2cf814f0316b8e"
+  integrity sha512-+GB6zVA9LWh6zovYQLALHwv5rb2PHGlJi3lfiqIHxR0uuwCgefcOJc59v9fv1w8GbStwxuuqqAjI9NMAOOgq1A==
+
 semver@^5.3.0:
   version "5.7.1"
   resolved "https://registry.yarnpkg.com/semver/-/semver-5.7.1.tgz#a954f931aeba508d307bbf069eff0c01c96116f7"
   integrity sha512-sauaDf/PZdVgrLTNYHRtpXa1iRiKcaebiKQ1BJdpQlWH2lCvexQdX55snPFyK7QzpudqbCI0qXFfOasHdyNDGQ==
 
+semver@^6.1.1, semver@^6.1.2, semver@^6.3.0:
+  version "6.3.0"
+  resolved "https://registry.yarnpkg.com/semver/-/semver-6.3.0.tgz#ee0a64c8af5e8ceea67687b133761e1becbd1d3d"
+  integrity sha512-b39TBaTSfV6yBrapU89p5fKekE2m/NwnDocOVruQFS1/veMgdzuPcnOM34M6CwxW8jH/lxEa5rBoDeUwu5HHTw==
+
 semver@~5.4.1:
   version "5.4.1"
   resolved "https://registry.yarnpkg.com/semver/-/semver-5.4.1.tgz#e059c09d8571f0540823733433505d3a2f00b18e"
@@ -3437,7 +3866,7 @@ source-map-support@^0.4.15:
   dependencies:
     source-map "^0.5.6"
 
-source-map@^0.5.6, source-map@^0.5.7:
+source-map@^0.5.0, source-map@^0.5.6, source-map@^0.5.7:
   version "0.5.7"
   resolved "https://registry.yarnpkg.com/source-map/-/source-map-0.5.7.tgz#8a039d2d1021d22d1ea14c80d8ea468ba2ef3fcc"
   integrity sha1-igOdLRAh0i0eoUyA2OpGi6LvP8w=
@@ -3530,6 +3959,13 @@ supports-color@^2.0.0:
   resolved "https://registry.yarnpkg.com/supports-color/-/supports-color-2.0.0.tgz#535d045ce6b6363fa40117084629995e9df324c7"
   integrity sha1-U10EXOa2Nj+kARcIRimZXp3zJMc=
 
+supports-color@^5.3.0:
+  version "5.5.0"
+  resolved "https://registry.yarnpkg.com/supports-color/-/supports-color-5.5.0.tgz#e2e69a44ac8772f78a1ec0b35b689df6530efc8f"
+  integrity sha512-QjVjwdXIt408MIiAqCX4oUKsgU2EqAGzs2Ppkm4aQYbjm+ZEWEcW4SfFNTr4uMNZma0ey4f5lgLrkB0aX0QMow==
+  dependencies:
+    has-flag "^3.0.0"
+
 swarm-js@0.1.39:
   version "0.1.39"
   resolved "https://registry.yarnpkg.com/swarm-js/-/swarm-js-0.1.39.tgz#79becb07f291d4b2a178c50fee7aa6e10342c0e8"
@@ -3623,6 +4059,11 @@ to-fast-properties@^1.0.3:
   resolved "https://registry.yarnpkg.com/to-fast-properties/-/to-fast-properties-1.0.3.tgz#b83571fa4d8c25b82e231b06e3a3055de4ca1a47"
   integrity sha1-uDVx+k2MJbguIxsG46MFXeTKGkc=
 
+to-fast-properties@^2.0.0:
+  version "2.0.0"
+  resolved "https://registry.yarnpkg.com/to-fast-properties/-/to-fast-properties-2.0.0.tgz#dc5e698cbd079265bc73e0377681a4e4e83f616e"
+  integrity sha1-3F5pjL0HkmW8c+A3doGk5Og/YW4=
+
 to-readable-stream@^1.0.0:
   version "1.0.0"
   resolved "https://registry.yarnpkg.com/to-readable-stream/-/to-readable-stream-1.0.0.tgz#ce0aa0c2f3df6adf852efb404a783e77c0475771"
@@ -3654,6 +4095,11 @@ truffle-assertions@^0.9.2:
     assertion-error "^1.1.0"
     lodash.isequal "^4.5.0"
 
+tslib@^2.0.0:
+  version "2.2.0"
+  resolved "https://registry.yarnpkg.com/tslib/-/tslib-2.2.0.tgz#fb2c475977e35e241311ede2693cee1ec6698f5c"
+  integrity sha512-gS9GVHRU+RGn5KQM2rllAlR3dU6m7AcpJKdtH8gFvQiC4Otgk98XnmMU+nZenHt/+VhnBPWwgrJsyrdcw6i23w==
+
 tunnel-agent@^0.6.0:
   version "0.6.0"
   resolved "https://registry.yarnpkg.com/tunnel-agent/-/tunnel-agent-0.6.0.tgz#27a5dea06b36b04a0a9966774b290868f0fc40fd"
@@ -3972,16 +4418,19 @@ web3-net@1.2.1:
     web3-core-method "1.2.1"
     web3-utils "1.2.1"
 
-"web3-provider-engine@git+https://github.com/trufflesuite/provider-engine.git#web3-one":
+"web3-provider-engine@https://github.com/trufflesuite/provider-engine#web3-one":
   version "14.0.6"
-  resolved "git+https://github.com/trufflesuite/provider-engine.git#3538c60bc4836b73ccae1ac3f64c8fed8ef19c1a"
+  uid "9694f5b4e5500651bd2ff689df8529bb5cf6b96f"
+  resolved "https://github.com/trufflesuite/provider-engine#9694f5b4e5500651bd2ff689df8529bb5cf6b96f"
   dependencies:
     async "^2.5.0"
     backoff "^2.5.0"
     clone "^2.0.0"
     cross-fetch "^2.1.0"
-    eth-block-tracker "^3.0.0"
+    eth-block-tracker "^4.2.0"
+    eth-json-rpc-filters "^4.0.2"
     eth-json-rpc-infura "^3.1.0"
+    eth-json-rpc-middleware "^4.1.1"
     eth-sig-util "^1.4.2"
     ethereumjs-block "^1.2.2"
     ethereumjs-tx "^1.2.0"