diff --git a/yarn.lock b/yarn.lock
index 9e663c1..294dadf 100644
--- a/yarn.lock
+++ b/yarn.lock
@@ -2,6 +2,159 @@
 # yarn lockfile v1
 
 
+"@babel/code-frame@^7.16.7":
+  version "7.16.7"
+  resolved "https://registry.yarnpkg.com/@babel/code-frame/-/code-frame-7.16.7.tgz#44416b6bd7624b998f5b1af5d470856c40138789"
+  dependencies:
+    "@babel/highlight" "^7.16.7"
+
+"@babel/compat-data@^7.13.11", "@babel/compat-data@^7.17.7":
+  version "7.17.7"
+  resolved "https://registry.yarnpkg.com/@babel/compat-data/-/compat-data-7.17.7.tgz#078d8b833fbbcc95286613be8c716cef2b519fa2"
+
+"@babel/generator@^7.17.3":
+  version "7.17.7"
+  resolved "https://registry.yarnpkg.com/@babel/generator/-/generator-7.17.7.tgz#8da2599beb4a86194a3b24df6c085931d9ee45ad"
+  dependencies:
+    "@babel/types" "^7.17.0"
+    jsesc "^2.5.1"
+    source-map "^0.5.0"
+
+"@babel/helper-compilation-targets@^7.13.0":
+  version "7.17.7"
+  resolved "https://registry.yarnpkg.com/@babel/helper-compilation-targets/-/helper-compilation-targets-7.17.7.tgz#a3c2924f5e5f0379b356d4cfb313d1414dc30e46"
+  dependencies:
+    "@babel/compat-data" "^7.17.7"
+    "@babel/helper-validator-option" "^7.16.7"
+    browserslist "^4.17.5"
+    semver "^6.3.0"
+
+"@babel/helper-define-polyfill-provider@^0.3.1":
+  version "0.3.1"
+  resolved "https://registry.yarnpkg.com/@babel/helper-define-polyfill-provider/-/helper-define-polyfill-provider-0.3.1.tgz#52411b445bdb2e676869e5a74960d2d3826d2665"
+  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-environment-visitor@^7.16.7":
+  version "7.16.7"
+  resolved "https://registry.yarnpkg.com/@babel/helper-environment-visitor/-/helper-environment-visitor-7.16.7.tgz#ff484094a839bde9d89cd63cba017d7aae80ecd7"
+  dependencies:
+    "@babel/types" "^7.16.7"
+
+"@babel/helper-function-name@^7.16.7":
+  version "7.16.7"
+  resolved "https://registry.yarnpkg.com/@babel/helper-function-name/-/helper-function-name-7.16.7.tgz#f1ec51551fb1c8956bc8dd95f38523b6cf375f8f"
+  dependencies:
+    "@babel/helper-get-function-arity" "^7.16.7"
+    "@babel/template" "^7.16.7"
+    "@babel/types" "^7.16.7"
+
+"@babel/helper-get-function-arity@^7.16.7":
+  version "7.16.7"
+  resolved "https://registry.yarnpkg.com/@babel/helper-get-function-arity/-/helper-get-function-arity-7.16.7.tgz#ea08ac753117a669f1508ba06ebcc49156387419"
+  dependencies:
+    "@babel/types" "^7.16.7"
+
+"@babel/helper-hoist-variables@^7.16.7":
+  version "7.16.7"
+  resolved "https://registry.yarnpkg.com/@babel/helper-hoist-variables/-/helper-hoist-variables-7.16.7.tgz#86bcb19a77a509c7b77d0e22323ef588fa58c246"
+  dependencies:
+    "@babel/types" "^7.16.7"
+
+"@babel/helper-module-imports@^7.12.13", "@babel/helper-module-imports@^7.16.7":
+  version "7.16.7"
+  resolved "https://registry.yarnpkg.com/@babel/helper-module-imports/-/helper-module-imports-7.16.7.tgz#25612a8091a999704461c8a222d0efec5d091437"
+  dependencies:
+    "@babel/types" "^7.16.7"
+
+"@babel/helper-plugin-utils@^7.13.0", "@babel/helper-plugin-utils@^7.16.7":
+  version "7.16.7"
+  resolved "https://registry.yarnpkg.com/@babel/helper-plugin-utils/-/helper-plugin-utils-7.16.7.tgz#aa3a8ab4c3cceff8e65eb9e73d87dc4ff320b2f5"
+
+"@babel/helper-split-export-declaration@^7.16.7":
+  version "7.16.7"
+  resolved "https://registry.yarnpkg.com/@babel/helper-split-export-declaration/-/helper-split-export-declaration-7.16.7.tgz#0b648c0c42da9d3920d85ad585f2778620b8726b"
+  dependencies:
+    "@babel/types" "^7.16.7"
+
+"@babel/helper-validator-identifier@^7.16.7":
+  version "7.16.7"
+  resolved "https://registry.yarnpkg.com/@babel/helper-validator-identifier/-/helper-validator-identifier-7.16.7.tgz#e8c602438c4a8195751243da9031d1607d247cad"
+
+"@babel/helper-validator-option@^7.16.7":
+  version "7.16.7"
+  resolved "https://registry.yarnpkg.com/@babel/helper-validator-option/-/helper-validator-option-7.16.7.tgz#b203ce62ce5fe153899b617c08957de860de4d23"
+
+"@babel/highlight@^7.16.7":
+  version "7.16.10"
+  resolved "https://registry.yarnpkg.com/@babel/highlight/-/highlight-7.16.10.tgz#744f2eb81579d6eea753c227b0f570ad785aba88"
+  dependencies:
+    "@babel/helper-validator-identifier" "^7.16.7"
+    chalk "^2.0.0"
+    js-tokens "^4.0.0"
+
+"@babel/parser@^7.16.7", "@babel/parser@^7.17.3":
+  version "7.17.8"
+  resolved "https://registry.yarnpkg.com/@babel/parser/-/parser-7.17.8.tgz#2817fb9d885dd8132ea0f8eb615a6388cca1c240"
+
+"@babel/plugin-transform-runtime@^7.5.5":
+  version "7.17.0"
+  resolved "https://registry.yarnpkg.com/@babel/plugin-transform-runtime/-/plugin-transform-runtime-7.17.0.tgz#0a2e08b5e2b2d95c4b1d3b3371a2180617455b70"
+  dependencies:
+    "@babel/helper-module-imports" "^7.16.7"
+    "@babel/helper-plugin-utils" "^7.16.7"
+    babel-plugin-polyfill-corejs2 "^0.3.0"
+    babel-plugin-polyfill-corejs3 "^0.5.0"
+    babel-plugin-polyfill-regenerator "^0.3.0"
+    semver "^6.3.0"
+
+"@babel/runtime@^7.5.5":
+  version "7.17.8"
+  resolved "https://registry.yarnpkg.com/@babel/runtime/-/runtime-7.17.8.tgz#3e56e4aff81befa55ac3ac6a0967349fd1c5bca2"
+  dependencies:
+    regenerator-runtime "^0.13.4"
+
+"@babel/template@^7.16.7":
+  version "7.16.7"
+  resolved "https://registry.yarnpkg.com/@babel/template/-/template-7.16.7.tgz#8d126c8701fde4d66b264b3eba3d96f07666d155"
+  dependencies:
+    "@babel/code-frame" "^7.16.7"
+    "@babel/parser" "^7.16.7"
+    "@babel/types" "^7.16.7"
+
+"@babel/traverse@^7.13.0":
+  version "7.17.3"
+  resolved "https://registry.yarnpkg.com/@babel/traverse/-/traverse-7.17.3.tgz#0ae0f15b27d9a92ba1f2263358ea7c4e7db47b57"
+  dependencies:
+    "@babel/code-frame" "^7.16.7"
+    "@babel/generator" "^7.17.3"
+    "@babel/helper-environment-visitor" "^7.16.7"
+    "@babel/helper-function-name" "^7.16.7"
+    "@babel/helper-hoist-variables" "^7.16.7"
+    "@babel/helper-split-export-declaration" "^7.16.7"
+    "@babel/parser" "^7.17.3"
+    "@babel/types" "^7.17.0"
+    debug "^4.1.0"
+    globals "^11.1.0"
+
+"@babel/types@^7.16.7", "@babel/types@^7.17.0":
+  version "7.17.0"
+  resolved "https://registry.yarnpkg.com/@babel/types/-/types-7.17.0.tgz#a826e368bccb6b3d84acd76acad5c0d87342390b"
+  dependencies:
+    "@babel/helper-validator-identifier" "^7.16.7"
+    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"
+
 "@openzeppelin/upgrades@^2.7.2":
   version "2.7.2"
   resolved "https://registry.yarnpkg.com/@openzeppelin/upgrades/-/upgrades-2.7.2.tgz#140124305af7aee935566e735f2aa970880ab3d1"
@@ -211,6 +364,12 @@ async-limiter@~1.0.0:
   version "1.0.1"
   resolved "https://registry.yarnpkg.com/async-limiter/-/async-limiter-1.0.1.tgz#dd379e94f0db8310b08291f9d64c3209766617fd"
 
+async-mutex@^0.2.6:
+  version "0.2.6"
+  resolved "https://registry.yarnpkg.com/async-mutex/-/async-mutex-0.2.6.tgz#0d7a3deb978bc2b984d5908a2038e1ae2e54ff40"
+  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"
@@ -398,6 +557,27 @@ babel-plugin-check-es2015-constants@^6.22.0:
   dependencies:
     babel-runtime "^6.22.0"
 
+babel-plugin-polyfill-corejs2@^0.3.0:
+  version "0.3.1"
+  resolved "https://registry.yarnpkg.com/babel-plugin-polyfill-corejs2/-/babel-plugin-polyfill-corejs2-0.3.1.tgz#440f1b70ccfaabc6b676d196239b138f8a2cfba5"
+  dependencies:
+    "@babel/compat-data" "^7.13.11"
+    "@babel/helper-define-polyfill-provider" "^0.3.1"
+    semver "^6.1.1"
+
+babel-plugin-polyfill-corejs3@^0.5.0:
+  version "0.5.2"
+  resolved "https://registry.yarnpkg.com/babel-plugin-polyfill-corejs3/-/babel-plugin-polyfill-corejs3-0.5.2.tgz#aabe4b2fa04a6e038b688c5e55d44e78cd3a5f72"
+  dependencies:
+    "@babel/helper-define-polyfill-provider" "^0.3.1"
+    core-js-compat "^3.21.0"
+
+babel-plugin-polyfill-regenerator@^0.3.0:
+  version "0.3.1"
+  resolved "https://registry.yarnpkg.com/babel-plugin-polyfill-regenerator/-/babel-plugin-polyfill-regenerator-0.3.1.tgz#2c0678ea47c75c8cc2fbb1852278d8fb68233990"
+  dependencies:
+    "@babel/helper-define-polyfill-provider" "^0.3.1"
+
 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 +1040,16 @@ browserslist@^3.2.6:
     caniuse-lite "^1.0.30000844"
     electron-to-chromium "^1.3.47"
 
+browserslist@^4.17.5, browserslist@^4.19.1:
+  version "4.20.2"
+  resolved "https://registry.yarnpkg.com/browserslist/-/browserslist-4.20.2.tgz#567b41508757ecd904dab4d1c646c612cd3d4f88"
+  dependencies:
+    caniuse-lite "^1.0.30001317"
+    electron-to-chromium "^1.4.84"
+    escalade "^3.1.1"
+    node-releases "^2.0.2"
+    picocolors "^1.0.0"
+
 bs58@^2.0.1:
   version "2.0.1"
   resolved "https://registry.yarnpkg.com/bs58/-/bs58-2.0.1.tgz#55908d58f1982aba2008fa1bed8f91998a29bf8d"
@@ -878,6 +1068,10 @@ 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"
+
 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"
@@ -936,6 +1130,10 @@ caniuse-lite@^1.0.30000844:
   version "1.0.30001036"
   resolved "https://registry.yarnpkg.com/caniuse-lite/-/caniuse-lite-1.0.30001036.tgz#930ea5272010d8bf190d859159d757c0b398caf0"
 
+caniuse-lite@^1.0.30001317:
+  version "1.0.30001320"
+  resolved "https://registry.yarnpkg.com/caniuse-lite/-/caniuse-lite-1.0.30001320.tgz#8397391bec389b8ccce328636499b7284ee13285"
+
 caseless@~0.12.0:
   version "0.12.0"
   resolved "https://registry.yarnpkg.com/caseless/-/caseless-0.12.0.tgz#1b681c21ff84033c826543090689420d187151dc"
@@ -959,7 +1157,7 @@ chalk@^1.1.3:
     strip-ansi "^3.0.0"
     supports-color "^2.0.0"
 
-chalk@^2.4.1, chalk@^2.4.2:
+chalk@^2.0.0, chalk@^2.4.1, chalk@^2.4.2:
   version "2.4.2"
   resolved "https://registry.yarnpkg.com/chalk/-/chalk-2.4.2.tgz#cd42541677a54333cf541a49108c1432b44c9424"
   dependencies:
@@ -996,7 +1194,7 @@ 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"
 
@@ -1074,6 +1272,13 @@ cookiejar@^2.1.1:
   version "2.1.2"
   resolved "https://registry.yarnpkg.com/cookiejar/-/cookiejar-2.1.2.tgz#dd8a235530752f988f9a0844f3fc589e3111125c"
 
+core-js-compat@^3.21.0:
+  version "3.21.1"
+  resolved "https://registry.yarnpkg.com/core-js-compat/-/core-js-compat-3.21.1.tgz#cac369f67c8d134ff8f9bd1623e3bc2c42068c82"
+  dependencies:
+    browserslist "^4.19.1"
+    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"
@@ -1171,6 +1376,12 @@ debug@^3.1.0:
   dependencies:
     ms "^2.1.1"
 
+debug@^4.1.0, debug@^4.1.1:
+  version "4.3.4"
+  resolved "https://registry.yarnpkg.com/debug/-/debug-4.3.4.tgz#1319f6579357f2338d3337d2cdd4914bb5dcc865"
+  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"
@@ -1334,6 +1545,10 @@ electron-to-chromium@^1.3.47:
   version "1.3.380"
   resolved "https://registry.yarnpkg.com/electron-to-chromium/-/electron-to-chromium-1.3.380.tgz#1e1f07091b42b54bccd0ad6d3a14f2b73b60dc9d"
 
+electron-to-chromium@^1.4.84:
+  version "1.4.94"
+  resolved "https://registry.yarnpkg.com/electron-to-chromium/-/electron-to-chromium-1.4.94.tgz#f19206c977361264a51d53a7ea7ef861a94baa10"
+
 elliptic@6.3.3:
   version "6.3.3"
   resolved "https://registry.yarnpkg.com/elliptic/-/elliptic-6.3.3.tgz#5482d9646d54bcb89fd7d994fc9e2e9568876e3f"
@@ -1424,6 +1639,10 @@ 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"
+
 escape-html@~1.0.3:
   version "1.0.3"
   resolved "https://registry.yarnpkg.com/escape-html/-/escape-html-1.0.3.tgz#0258eae4d3d0c0974de1c169188ef0051d1d1988"
@@ -1440,17 +1659,16 @@ etag@~1.8.1:
   version "1.8.1"
   resolved "https://registry.yarnpkg.com/etag/-/etag-1.8.1.tgz#41ae2eeb65efa62268aebfea83ac7d79299b0887"
 
-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"
+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"
   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"
@@ -1459,6 +1677,23 @@ 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"
+  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"
+  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"
@@ -1486,6 +1721,41 @@ 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"
+  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"
+  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"
@@ -1512,6 +1782,18 @@ 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"
+  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"
+  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"
@@ -1591,7 +1873,7 @@ ethereumjs-common@^1.1.0, ethereumjs-common@^1.3.2, ethereumjs-common@^1.5.0:
   version "1.5.0"
   resolved "https://registry.yarnpkg.com/ethereumjs-common/-/ethereumjs-common-1.5.0.tgz#d3e82fc7c47c0cef95047f431a99485abc9bb1cd"
 
-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"
   dependencies:
@@ -1605,7 +1887,7 @@ 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"
   dependencies:
@@ -1784,6 +2066,10 @@ fast-json-stable-stringify@^2.0.0:
   version "2.1.0"
   resolved "https://registry.yarnpkg.com/fast-json-stable-stringify/-/fast-json-stable-stringify-2.1.0.tgz#874bf69c6f404c2b5d99c481341399fd55892633"
 
+fast-safe-stringify@^2.0.6:
+  version "2.1.1"
+  resolved "https://registry.yarnpkg.com/fast-safe-stringify/-/fast-safe-stringify-2.1.1.tgz#c406a83b6e70d9e35ce3b30a81141df30aeba884"
+
 fd-slicer@~1.1.0:
   version "1.1.0"
   resolved "https://registry.yarnpkg.com/fd-slicer/-/fd-slicer-1.1.0.tgz#25c7c89cb1f9077f8891bbe61d8f390eae256f1e"
@@ -1939,6 +2225,10 @@ 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"
+
 globals@^9.18.0:
   version "9.18.0"
   resolved "https://registry.yarnpkg.com/globals/-/globals-9.18.0.tgz#aa3896b3e69b487f17e31ed2143d69a8e30c2d8a"
@@ -2168,6 +2458,12 @@ is-callable@^1.1.3, is-callable@^1.1.4, is-callable@^1.1.5:
   version "1.1.5"
   resolved "https://registry.yarnpkg.com/is-callable/-/is-callable-1.1.5.tgz#f7e46b596890456db74e7f6e976cb3273d06faab"
 
+is-core-module@^2.8.1:
+  version "2.8.1"
+  resolved "https://registry.yarnpkg.com/is-core-module/-/is-core-module-2.8.1.tgz#f59fdfca701d5879d0a6b100a40aa1560ce27211"
+  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"
@@ -2251,7 +2547,7 @@ js-sha3@^0.8.0:
   version "0.8.0"
   resolved "https://registry.yarnpkg.com/js-sha3/-/js-sha3-0.8.0.tgz#b9b7a5da73afad7dedd0f8c463954cbde6818840"
 
-"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"
 
@@ -2267,6 +2563,10 @@ jsesc@^1.3.0:
   version "1.3.0"
   resolved "https://registry.yarnpkg.com/jsesc/-/jsesc-1.3.0.tgz#46c3fec8c1892b12b0833db9bc7622176dbab34b"
 
+jsesc@^2.5.1:
+  version "2.5.2"
+  resolved "https://registry.yarnpkg.com/jsesc/-/jsesc-2.5.2.tgz#80564d2e483dacf6e8ef209650a67df3f0c283a4"
+
 jsesc@~0.5.0:
   version "0.5.0"
   resolved "https://registry.yarnpkg.com/jsesc/-/jsesc-0.5.0.tgz#e7dee66e35d6fc16f710fe91d5cf69f70f08911d"
@@ -2286,13 +2586,27 @@ 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"
+  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"
+  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"
   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"
 
@@ -2422,6 +2736,10 @@ lodash.concat@^4.5.0:
   version "4.5.0"
   resolved "https://registry.yarnpkg.com/lodash.concat/-/lodash.concat-4.5.0.tgz#b053ae02e4a8008582e7256b9d02bda6d0380395"
 
+lodash.debounce@^4.0.8:
+  version "4.0.8"
+  resolved "https://registry.yarnpkg.com/lodash.debounce/-/lodash.debounce-4.0.8.tgz#82d79bff30a67c4005ffd5e2515300ad9ca4d7af"
+
 lodash.difference@^4.5.0:
   version "4.5.0"
   resolved "https://registry.yarnpkg.com/lodash.difference/-/lodash.difference-4.5.0.tgz#9ccb4e505d486b91651345772885a2df27fd017c"
@@ -2624,8 +2942,8 @@ minimatch@^3.0.4:
     brace-expansion "^1.1.7"
 
 minimist@^1.2.5, minimist@~1.2.0:
-  version "1.2.5"
-  resolved "https://registry.yarnpkg.com/minimist/-/minimist-1.2.5.tgz#67d66014b66a6a8aaa0c083c5fd58df4e4e97602"
+  version "1.2.6"
+  resolved "https://registry.yarnpkg.com/minimist/-/minimist-1.2.6.tgz#8637a5b759ea0d6e98702cfb3a9283323c93af44"
 
 minipass@^2.6.0, minipass@^2.8.6, minipass@^2.9.0:
   version "2.9.0"
@@ -2668,7 +2986,7 @@ ms@2.1.1:
   version "2.1.1"
   resolved "https://registry.yarnpkg.com/ms/-/ms-2.1.1.tgz#30a5864eb3ebb0a66f2ebe6d727af06a09d86e0a"
 
-ms@^2.1.1:
+ms@2.1.2, ms@^2.1.1:
   version "2.1.2"
   resolved "https://registry.yarnpkg.com/ms/-/ms-2.1.2.tgz#d09d1f357b443f493382a8eb3ccd183872ae6009"
 
@@ -2692,6 +3010,12 @@ node-fetch@2.1.2:
   version "2.1.2"
   resolved "https://registry.yarnpkg.com/node-fetch/-/node-fetch-2.1.2.tgz#ab884e8e7e57e38a944753cec706f788d1768bb5"
 
+node-fetch@^2.6.1:
+  version "2.6.7"
+  resolved "https://registry.yarnpkg.com/node-fetch/-/node-fetch-2.6.7.tgz#24de9fba827e3b4ae44dc8b20256a379160052ad"
+  dependencies:
+    whatwg-url "^5.0.0"
+
 node-fetch@~1.7.1:
   version "1.7.3"
   resolved "https://registry.yarnpkg.com/node-fetch/-/node-fetch-1.7.3.tgz#980f6f72d85211a5347c6b2bc18c5b84c3eb47ef"
@@ -2699,6 +3023,10 @@ node-fetch@~1.7.1:
     encoding "^0.1.11"
     is-stream "^1.0.1"
 
+node-releases@^2.0.2:
+  version "2.0.2"
+  resolved "https://registry.yarnpkg.com/node-releases/-/node-releases-2.0.2.tgz#7139fe71e2f4f11b47d4d2986aaf8c48699e0c01"
+
 nofilter@^1.0.3:
   version "1.0.3"
   resolved "https://registry.yarnpkg.com/nofilter/-/nofilter-1.0.3.tgz#34e54b4cc9757de0cad38cc0d19462489b1b7f5d"
@@ -2844,6 +3172,10 @@ path-parse@^1.0.6:
   version "1.0.6"
   resolved "https://registry.yarnpkg.com/path-parse/-/path-parse-1.0.6.tgz#d62dbb5679405d72c4737ec58600e9ddcf06d24c"
 
+path-parse@^1.0.7:
+  version "1.0.7"
+  resolved "https://registry.yarnpkg.com/path-parse/-/path-parse-1.0.7.tgz#fbc114b60ca42b30d9daf5858e4bd68bbedb6735"
+
 path-to-regexp@0.1.7:
   version "0.1.7"
   resolved "https://registry.yarnpkg.com/path-to-regexp/-/path-to-regexp-0.1.7.tgz#df604178005f522f15eb4490e7247a1bfaa67f8c"
@@ -2866,6 +3198,10 @@ performance-now@^2.1.0:
   version "2.1.0"
   resolved "https://registry.yarnpkg.com/performance-now/-/performance-now-2.1.0.tgz#6309f4e0e5fa913ec1c69307ae364b4b377c9e7b"
 
+picocolors@^1.0.0:
+  version "1.0.0"
+  resolved "https://registry.yarnpkg.com/picocolors/-/picocolors-1.0.0.tgz#cb5bdc74ff3f51892236eaf79d68bc44564ab81c"
+
 pify@^2.3.0:
   version "2.3.0"
   resolved "https://registry.yarnpkg.com/pify/-/pify-2.3.0.tgz#ed141a6ac043a849ea588498e7dca8b15330e90c"
@@ -2874,6 +3210,10 @@ pify@^3.0.0:
   version "3.0.0"
   resolved "https://registry.yarnpkg.com/pify/-/pify-3.0.0.tgz#e5a4acd2c101fdf3d9a4d07f0dbc4db49dd28176"
 
+pify@^5.0.0:
+  version "5.0.0"
+  resolved "https://registry.yarnpkg.com/pify/-/pify-5.0.0.tgz#1f5eca3f5e87ebec28cc6d54a0e4aaf00acc127f"
+
 pinkie-promise@^2.0.0:
   version "2.0.1"
   resolved "https://registry.yarnpkg.com/pinkie-promise/-/pinkie-promise-2.0.1.tgz#2135d6dfa7a358c069ac9b178776288228450ffa"
@@ -3040,6 +3380,10 @@ regenerator-runtime@^0.11.0:
   version "0.11.1"
   resolved "https://registry.yarnpkg.com/regenerator-runtime/-/regenerator-runtime-0.11.1.tgz#be05ad7f9bf7d22e056f9726cee5017fbf19e2e9"
 
+regenerator-runtime@^0.13.4:
+  version "0.13.9"
+  resolved "https://registry.yarnpkg.com/regenerator-runtime/-/regenerator-runtime-0.13.9.tgz#8925742a98ffd90814988d7566ad30ca3b263b52"
+
 regenerator-transform@^0.10.0:
   version "0.10.1"
   resolved "https://registry.yarnpkg.com/regenerator-transform/-/regenerator-transform-0.10.1.tgz#1e4996837231da8b7f3cf4114d71b5691a0680dd"
@@ -3104,6 +3448,14 @@ request@^2.79.0, request@^2.85.0:
     tunnel-agent "^0.6.0"
     uuid "^3.3.2"
 
+resolve@^1.14.2:
+  version "1.22.0"
+  resolved "https://registry.yarnpkg.com/resolve/-/resolve-1.22.0.tgz#5e0b8c67c15df57a89bdbabe603a002f21731198"
+  dependencies:
+    is-core-module "^2.8.1"
+    path-parse "^1.0.7"
+    supports-preserve-symlinks-flag "^1.0.0"
+
 resolve@~1.15.1:
   version "1.15.1"
   resolved "https://registry.yarnpkg.com/resolve/-/resolve-1.15.1.tgz#27bdcdeffeaf2d6244b95bb0f9f4b4653451f3e8"
@@ -3230,11 +3582,15 @@ semver@6.2.0:
   version "6.2.0"
   resolved "https://registry.yarnpkg.com/semver/-/semver-6.2.0.tgz#4d813d9590aaf8a9192693d6c85b9344de5901db"
 
+semver@7.0.0:
+  version "7.0.0"
+  resolved "https://registry.yarnpkg.com/semver/-/semver-7.0.0.tgz#5f3ca35761e47e05b206c6daff2cf814f0316b8e"
+
 semver@^5.3.0, semver@^5.5.1:
   version "5.7.1"
   resolved "https://registry.yarnpkg.com/semver/-/semver-5.7.1.tgz#a954f931aeba508d307bbf069eff0c01c96116f7"
 
-semver@^6.3.0:
+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"
 
@@ -3339,7 +3695,7 @@ source-map-support@^0.5.16:
     buffer-from "^1.0.0"
     source-map "^0.6.0"
 
-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"
 
@@ -3443,6 +3799,10 @@ supports-color@^5.3.0:
   dependencies:
     has-flag "^3.0.0"
 
+supports-preserve-symlinks-flag@^1.0.0:
+  version "1.0.0"
+  resolved "https://registry.yarnpkg.com/supports-preserve-symlinks-flag/-/supports-preserve-symlinks-flag-1.0.0.tgz#6eda4bd344a3c94aea376d4cc31bc77311039e09"
+
 swarm-js@0.1.39:
   version "0.1.39"
   resolved "https://registry.yarnpkg.com/swarm-js/-/swarm-js-0.1.39.tgz#79becb07f291d4b2a178c50fee7aa6e10342c0e8"
@@ -3527,6 +3887,10 @@ to-fast-properties@^1.0.3:
   version "1.0.3"
   resolved "https://registry.yarnpkg.com/to-fast-properties/-/to-fast-properties-1.0.3.tgz#b83571fa4d8c25b82e231b06e3a3055de4ca1a47"
 
+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"
+
 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"
@@ -3542,6 +3906,10 @@ tough-cookie@~2.5.0:
     psl "^1.1.28"
     punycode "^2.1.1"
 
+tr46@~0.0.3:
+  version "0.0.3"
+  resolved "https://registry.yarnpkg.com/tr46/-/tr46-0.0.3.tgz#8184fd347dac9cdc185992f3a6622e14b9d9ab6a"
+
 trim-right@^1.0.1:
   version "1.0.1"
   resolved "https://registry.yarnpkg.com/trim-right/-/trim-right-1.0.1.tgz#cb2e1203067e0c8de1f614094b9fe45704ea6003"
@@ -3556,6 +3924,10 @@ truffle-flattener@^1.4.0:
     solidity-parser-antlr "^0.4.11"
     tsort "0.0.1"
 
+tslib@^2.0.0:
+  version "2.3.1"
+  resolved "https://registry.yarnpkg.com/tslib/-/tslib-2.3.1.tgz#e8a335add5ceae51aa261d32a490158ef042ef01"
+
 tsort@0.0.1:
   version "0.0.1"
   resolved "https://registry.yarnpkg.com/tsort/-/tsort-0.0.1.tgz#e2280f5e817f8bf4275657fd0f9aebd44f5a2786"
@@ -3996,16 +4368,19 @@ web3-net@1.2.2:
     web3-core-method "1.2.2"
     web3-utils "1.2.2"
 
-"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"
@@ -4135,6 +4510,10 @@ web3@1.2.2:
     web3-shh "1.2.2"
     web3-utils "1.2.2"
 
+webidl-conversions@^3.0.0:
+  version "3.0.1"
+  resolved "https://registry.yarnpkg.com/webidl-conversions/-/webidl-conversions-3.0.1.tgz#24534275e2a7bc6be7bc86611cc16ae0a5654871"
+
 "websocket@github:web3-js/WebSocket-Node#polyfill/globalThis":
   version "1.0.29"
   resolved "https://codeload.github.com/web3-js/WebSocket-Node/tar.gz/905deb4812572b344f5801f8c9ce8bb02799d82e"
@@ -4149,6 +4528,13 @@ whatwg-fetch@2.0.4:
   version "2.0.4"
   resolved "https://registry.yarnpkg.com/whatwg-fetch/-/whatwg-fetch-2.0.4.tgz#dde6a5df315f9d39991aa17621853d720b85566f"
 
+whatwg-url@^5.0.0:
+  version "5.0.0"
+  resolved "https://registry.yarnpkg.com/whatwg-url/-/whatwg-url-5.0.0.tgz#966454e8765462e37644d3626f6742ce8b70965d"
+  dependencies:
+    tr46 "~0.0.3"
+    webidl-conversions "^3.0.0"
+
 wrappy@1:
   version "1.0.2"
   resolved "https://registry.yarnpkg.com/wrappy/-/wrappy-1.0.2.tgz#b5243d8f3ec1aa35f1364605bc0d1036e30ab69f"