added node version requirements

5 files changed, 48 insertions, 47 deletions

diff --git a/.circleci/config.yml b/.circleci/config.yml
index c0262fcf..fb8c0fb7 100644
--- a/.circleci/config.yml
+++ b/.circleci/config.yml
@@ -102,15 +102,25 @@ jobs:
       - checkout
       - restore_cache:
           keys:
-            - dependency-cache-{{ checksum "package-lock.json" }}
+            - v4-dependency-cache-{{ checksum "package-lock.json" }}
             # fallback to using the latest cache if no exact match is found
-            - dependency-cache-
+            - v4-dependency-cache-
       - run:
           name: Install npm 6 + deps via npm
           command: |
            sudo npm install -g npm@6.1.0 && npm install
+      - run:
+          name: Check status of package-lock.json
+          command: |
+            if git status | grep "package-lock.json"  > /dev/null; then
+              echo "Looks like the package-lock.json was modified after running npm i. See the diff below:"
+              git diff package-lock.json | grep ""
+              echo "---------------------------------------------------------------------"
+              echo "Please make sure you run npm install (using node 8.11.3 + npm 6.1.0), then commit and push the latest changes in your package-lock.json"
+              exit 1;
+            fi
       - save_cache:
-          key: dependency-cache-{{ checksum "package-lock.json" }}
+          key: v4-dependency-cache-{{ checksum "package-lock.json" }}
           paths:
             - node_modules
 
@@ -120,12 +130,12 @@ jobs:
     steps:
       - checkout
       - restore_cache:
-          key: dependency-cache-firefox-
+          key: v4-dependency-cache-firefox-
       - run:
           name: Download Firefox If needed
           command: ./.circleci/scripts/firefox-download.sh
       - save_cache:
-          key: dependency-cache-firefox-
+          key: v4-dependency-cache-firefox-
           paths:
             - firefox
 
@@ -135,7 +145,7 @@ jobs:
     steps:
       - checkout
       - restore_cache:
-          key: dependency-cache-{{ checksum "package-lock.json" }}
+          key: v4-dependency-cache-{{ checksum "package-lock.json" }}
       - run:
           name: build:dist
           command: npm run dist
@@ -154,7 +164,7 @@ jobs:
     steps:
       - checkout
       - restore_cache:
-          key: dependency-cache-{{ checksum "package-lock.json" }}
+          key: v4-dependency-cache-{{ checksum "package-lock.json" }}
       - run:
           name: build:dist
           command: npm run doc
@@ -169,7 +179,7 @@ jobs:
     steps:
       - checkout
       - restore_cache:
-          key: dependency-cache-{{ checksum "package-lock.json" }}
+          key: v4-dependency-cache-{{ checksum "package-lock.json" }}
       - run:
           name: Get Scss Cache key
           # this allows us to checksum against a whole directory
@@ -188,7 +198,7 @@ jobs:
     steps:
       - checkout
       - restore_cache:
-          key: dependency-cache-{{ checksum "package-lock.json" }}
+          key: v4-dependency-cache-{{ checksum "package-lock.json" }}
       - run:
           name: Test
           command: npm run lint
@@ -199,7 +209,7 @@ jobs:
     steps:
       - checkout
       - restore_cache:
-          key: dependency-cache-{{ checksum "package-lock.json" }}
+          key: v4-dependency-cache-{{ checksum "package-lock.json" }}
       - run:
           name: Test
           command: npx nsp check
@@ -210,7 +220,7 @@ jobs:
     steps:
       - checkout
       - restore_cache:
-          key: dependency-cache-{{ checksum "package-lock.json" }}
+          key: v4-dependency-cache-{{ checksum "package-lock.json" }}
       - restore_cache:
           key: build-cache-{{ .Revision }}
       - run:
@@ -226,12 +236,12 @@ jobs:
     steps:
       - checkout
       - restore_cache:
-          key: dependency-cache-firefox-
+          key: v4-dependency-cache-firefox-
       - run:
           name: Install firefox
           command: ./.circleci/scripts/firefox-install.sh
       - restore_cache:
-          key: dependency-cache-{{ checksum "package-lock.json" }}
+          key: v4-dependency-cache-{{ checksum "package-lock.json" }}
       - restore_cache:
           key: build-cache-{{ .Revision }}
       - run:
@@ -247,7 +257,7 @@ jobs:
     steps:
       - checkout
       - restore_cache:
-          key: dependency-cache-{{ checksum "package-lock.json" }}
+          key: v4-dependency-cache-{{ checksum "package-lock.json" }}
       - restore_cache:
           key: build-cache-{{ .Revision }}
       - run:
@@ -263,12 +273,12 @@ jobs:
     steps:
       - checkout
       - restore_cache:
-          key: dependency-cache-firefox-
+          key: v4-dependency-cache-firefox-
       - run:
           name: Install firefox
           command: ./.circleci/scripts/firefox-install.sh
       - restore_cache:
-          key: dependency-cache-{{ checksum "package-lock.json" }}
+          key: v4-dependency-cache-{{ checksum "package-lock.json" }}
       - restore_cache:
           key: build-cache-{{ .Revision }}
       - run:
@@ -284,7 +294,7 @@ jobs:
     steps:
       - checkout
       - restore_cache:
-          key: dependency-cache-{{ checksum "package-lock.json" }}
+          key: v4-dependency-cache-{{ checksum "package-lock.json" }}
       - restore_cache:
           key: build-cache-{{ .Revision }}
       - run:
@@ -301,7 +311,7 @@ jobs:
     steps:
       - checkout
       - restore_cache:
-          key: dependency-cache-{{ checksum "package-lock.json" }}
+          key: v4-dependency-cache-{{ checksum "package-lock.json" }}
       - restore_cache:
           key: build-cache-{{ .Revision }}
       - restore_cache:
@@ -328,7 +338,7 @@ jobs:
     steps:
       - checkout
       - restore_cache:
-          key: dependency-cache-{{ checksum "package-lock.json" }}
+          key: v4-dependency-cache-{{ checksum "package-lock.json" }}
       - restore_cache:
           key: build-cache-{{ .Revision }}
       - restore_cache:
@@ -351,7 +361,7 @@ jobs:
     steps:
       - checkout
       - restore_cache:
-          key: dependency-cache-{{ checksum "package-lock.json" }}
+          key: v4-dependency-cache-{{ checksum "package-lock.json" }}
       - run:
           name: test:coverage
           command: npm run test:coverage
@@ -364,12 +374,12 @@ jobs:
     steps:
       - checkout
       - restore_cache:
-          key: dependency-cache-firefox-
+          key: v4-dependency-cache-firefox-
       - run:
           name: Install firefox
           command: ./.circleci/scripts/firefox-install.sh
       - restore_cache:
-          key: dependency-cache-{{ checksum "package-lock.json" }}
+          key: v4-dependency-cache-{{ checksum "package-lock.json" }}
       - run:
           name: Get Scss Cache key
           # this allows us to checksum against a whole directory
@@ -388,7 +398,7 @@ jobs:
     steps:
       - checkout
       - restore_cache:
-          key: dependency-cache-{{ checksum "package-lock.json" }}
+          key: v4-dependency-cache-{{ checksum "package-lock.json" }}
       - run:
           name: Get Scss Cache key
           # this allows us to checksum against a whole directory
@@ -407,12 +417,12 @@ jobs:
     steps:
       - checkout
       - restore_cache:
-          key: dependency-cache-firefox-
+          key: v4-dependency-cache-firefox-
       - run:
           name: Install firefox
           command: ./.circleci/scripts/firefox-install.sh
       - restore_cache:
-          key: dependency-cache-{{ checksum "package-lock.json" }}
+          key: v4-dependency-cache-{{ checksum "package-lock.json" }}
       - run:
           name: Get Scss Cache key
           # this allows us to checksum against a whole directory
@@ -431,7 +441,7 @@ jobs:
     steps:
       - checkout
       - restore_cache:
-          key: dependency-cache-{{ checksum "package-lock.json" }}
+          key: v4-dependency-cache-{{ checksum "package-lock.json" }}
       - run:
           name: Get Scss Cache key
           # this allows us to checksum against a whole directory
diff --git a/.npmrc b/.npmrc
new file mode 100644
index 00000000..b6f27f13
--- /dev/null
+++ b/.npmrc
@@ -0,0 +1 @@
+engine-strict=true
diff --git a/README.md b/README.md
index 8bedb316..8a1eda46 100644
--- a/README.md
+++ b/README.md
@@ -26,10 +26,9 @@ If you're a web dapp developer, we've got two types of guides for you:
 
 ## Building locally
 
- - Install [Node.js](https://nodejs.org/en/) version 6.3.1 or later.
+ - Install [Node.js](https://nodejs.org/en/) version 8.11.3 and npm version 6.1.0
  - Install dependencies:
-   - For node versions up to and including 9, install local dependencies with `npm install`.
-   - For node versions 10 and later, install [Yarn](https://yarnpkg.com/lang/en/docs/install/) and use `yarn install`.
+   - If you are using nvm (recommended) running `nvm use` will automatically choose the right node version for you.
  - Install gulp globally with `npm install -g gulp-cli`.
  - Build the project to the `./dist/` folder with `gulp build`.
  - Optionally, to rebuild on file changes, run `gulp dev`.
diff --git a/package-lock.json b/package-lock.json
index fcbed778..443e173a 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -8390,13 +8390,12 @@
                     "resolved": "https://registry.npmjs.org/eth-sig-util/-/eth-sig-util-2.0.1.tgz",
                     "integrity": "sha512-lxHZOQspexk3DaGj4RBbWy4C/qNOWRnxpaJzNnYD3WEmC8shcJ4tHs7Xv878rzvILfJnSFSCCiKQhng1m80oBQ==",
                     "requires": {
-                        "ethereumjs-abi": "git+https://github.com/ethereumjs/ethereumjs-abi.git#00ba8463a7f7a67fcad737ff9c2ebd95643427f7",
                         "ethereumjs-util": "^5.1.1"
                     },
                     "dependencies": {
                         "ethereumjs-abi": {
                             "version": "git+https://github.com/ethereumjs/ethereumjs-abi.git#00ba8463a7f7a67fcad737ff9c2ebd95643427f7",
-                            "from": "git+https://github.com/ethereumjs/ethereumjs-abi.git",
+                            "from": "git+https://github.com/ethereumjs/ethereumjs-abi.git#00ba8463a7f7a67fcad737ff9c2ebd95643427f7",
                             "requires": {
                                 "bn.js": "^4.10.0",
                                 "ethereumjs-util": "^5.0.0"
@@ -8674,13 +8673,12 @@
             "resolved": "https://registry.npmjs.org/eth-sig-util/-/eth-sig-util-1.4.2.tgz",
             "integrity": "sha1-jZWCAsftuq6Dlwf7pvCf8ydgYhA=",
             "requires": {
-                "ethereumjs-abi": "git+https://github.com/ethereumjs/ethereumjs-abi.git#00ba8463a7f7a67fcad737ff9c2ebd95643427f7",
                 "ethereumjs-util": "^5.1.1"
             },
             "dependencies": {
                 "ethereumjs-abi": {
                     "version": "git+https://github.com/ethereumjs/ethereumjs-abi.git#00ba8463a7f7a67fcad737ff9c2ebd95643427f7",
-                    "from": "git+https://github.com/ethereumjs/ethereumjs-abi.git",
+                    "from": "git+https://github.com/ethereumjs/ethereumjs-abi.git#00ba8463a7f7a67fcad737ff9c2ebd95643427f7",
                     "requires": {
                         "bn.js": "^4.10.0",
                         "ethereumjs-util": "^5.0.0"
@@ -8722,14 +8720,12 @@
                     "integrity": "sha512-lxHZOQspexk3DaGj4RBbWy4C/qNOWRnxpaJzNnYD3WEmC8shcJ4tHs7Xv878rzvILfJnSFSCCiKQhng1m80oBQ==",
                     "dev": true,
                     "requires": {
-                        "ethereumjs-abi": "git+https://github.com/ethereumjs/ethereumjs-abi.git#00ba8463a7f7a67fcad737ff9c2ebd95643427f7",
                         "ethereumjs-util": "^5.1.1"
                     },
                     "dependencies": {
                         "ethereumjs-abi": {
                             "version": "git+https://github.com/ethereumjs/ethereumjs-abi.git#00ba8463a7f7a67fcad737ff9c2ebd95643427f7",
-                            "from": "git+https://github.com/ethereumjs/ethereumjs-abi.git",
-                            "dev": true,
+                            "from": "git+https://github.com/ethereumjs/ethereumjs-abi.git#00ba8463a7f7a67fcad737ff9c2ebd95643427f7",
                             "requires": {
                                 "bn.js": "^4.10.0",
                                 "ethereumjs-util": "^5.0.0"
@@ -8741,7 +8737,6 @@
                     "version": "5.2.0",
                     "resolved": "https://registry.npmjs.org/ethereumjs-util/-/ethereumjs-util-5.2.0.tgz",
                     "integrity": "sha512-CJAKdI0wgMbQFLlLRtZKGcy/L6pzVRgelIZqRqNbuVFM3K9VEnyfbcvz0ncWMRNCe4kaHWjwRYQcYMucmwsnWA==",
-                    "dev": true,
                     "requires": {
                         "bn.js": "^4.11.0",
                         "create-hash": "^1.1.2",
@@ -30689,7 +30684,6 @@
             "version": "3.1.5",
             "resolved": "https://registry.npmjs.org/typedarray-to-buffer/-/typedarray-to-buffer-3.1.5.tgz",
             "integrity": "sha512-zdu8XMNEDepKKR+XYOXAVPtWui0ly0NtohUscw+UmaHiAWT8hrV1rr//H6V+0DvJ3OQ19S979M0laLfX8rm82Q==",
-            "dev": true,
             "requires": {
                 "is-typedarray": "^1.0.0"
             }
@@ -31713,7 +31707,6 @@
             "resolved": "https://registry.npmjs.org/web3/-/web3-0.20.3.tgz",
             "integrity": "sha1-yqRDc9yIFayHZ73ba6cwc5ZMqos=",
             "requires": {
-                "bignumber.js": "git+https://github.com/frozeman/bignumber.js-nolookahead.git#57692b3ecfc98bbdd6b3a516cb2353652ea49934",
                 "crypto-js": "^3.1.4",
                 "utf8": "^2.1.1",
                 "xhr2": "*",
@@ -31722,7 +31715,7 @@
             "dependencies": {
                 "bignumber.js": {
                     "version": "git+https://github.com/frozeman/bignumber.js-nolookahead.git#57692b3ecfc98bbdd6b3a516cb2353652ea49934",
-                    "from": "git+https://github.com/frozeman/bignumber.js-nolookahead.git"
+                    "from": "git+https://github.com/frozeman/bignumber.js-nolookahead.git#57692b3ecfc98bbdd6b3a516cb2353652ea49934"
                 }
             }
         },
@@ -32221,8 +32214,7 @@
             "dev": true,
             "requires": {
                 "underscore": "1.8.3",
-                "web3-core-helpers": "1.0.0-beta.34",
-                "websocket": "git://github.com/frozeman/WebSocket-Node.git#6c72925e3f8aaaea8dc8450f97627e85263999f2"
+                "web3-core-helpers": "1.0.0-beta.34"
             },
             "dependencies": {
                 "underscore": {
@@ -32233,8 +32225,7 @@
                 },
                 "websocket": {
                     "version": "git://github.com/frozeman/WebSocket-Node.git#6c72925e3f8aaaea8dc8450f97627e85263999f2",
-                    "from": "git://github.com/frozeman/WebSocket-Node.git#browserifyCompatible",
-                    "dev": true,
+                    "from": "git://github.com/frozeman/WebSocket-Node.git#6c72925e3f8aaaea8dc8450f97627e85263999f2",
                     "requires": {
                         "debug": "^2.2.0",
                         "nan": "^2.3.3",
@@ -33590,8 +33581,7 @@
         "yaeti": {
             "version": "0.0.6",
             "resolved": "https://registry.npmjs.org/yaeti/-/yaeti-0.0.6.tgz",
-            "integrity": "sha1-8m9ITXJoTPQr7ft2lwqhYI+/lXc=",
-            "dev": true
+            "integrity": "sha1-8m9ITXJoTPQr7ft2lwqhYI+/lXc="
         },
         "yallist": {
             "version": "2.1.2",
diff --git a/package.json b/package.json
index b7b138d2..376f773e 100644
--- a/package.json
+++ b/package.json
@@ -307,6 +307,7 @@
     "watchify": "^3.11.0"
   },
   "engines": {
-    "node": ">=8.0.0"
+    "node": "8.11.3",
+    "npm": "^6.1.0"
   }
 }