Merge pull request #87 from 0xProject/wrap-log-bignumber

Wrap all event args in a newer version of BigNumber and test it

4 files changed, 407 insertions, 57 deletions

diff --git a/src/contract_wrappers/exchange_wrapper.ts b/src/contract_wrappers/exchange_wrapper.ts
index f596cb429..57a116aea 100644
--- a/src/contract_wrappers/exchange_wrapper.ts
+++ b/src/contract_wrappers/exchange_wrapper.ts
@@ -1,6 +1,7 @@
 import * as _ from 'lodash';
 import * as BigNumber from 'bignumber.js';
 import promisify = require('es6-promisify');
+import * as Web3 from 'web3';
 import {Web3Wrapper} from '../web3_wrapper';
 import {
     ECSignature,
@@ -26,6 +27,8 @@ import {
     LogErrorContractEventArgs,
     LogFillContractEventArgs,
     LogCancelContractEventArgs,
+    EventCallback,
+    ContractEventArg,
     ExchangeContractByAddress,
     ContractArtifact,
 } from '../types';
@@ -653,14 +656,36 @@ export class ExchangeWrapper extends ContractWrapper {
         return isAuthorized;
     }
     private _wrapEventEmitter(event: ContractEventObj): ContractEventEmitter {
+        const watch = (eventCallback: EventCallback) => {
+            const bignumberWrappingEventCallback = this._getBigNumberWrappingEventCallback(eventCallback);
+            event.watch(bignumberWrappingEventCallback);
+        };
         const zeroExEvent = {
-            watch: event.watch.bind(event),
+            watch,
             stopWatchingAsync: async () => {
                 await promisify(event.stopWatching, event)();
             },
         };
         return zeroExEvent;
     }
+    private _getBigNumberWrappingEventCallback(eventCallback: EventCallback): EventCallback {
+        const bignumberWrappingEventCallback = (err: Error, event: ContractEvent) => {
+            if (_.isNull(err)) {
+                const wrapIfBigNumber = (value: ContractEventArg): ContractEventArg => {
+                    // HACK: The old version of BigNumber used by Web3@0.19.0 does not support the `isBigNumber`
+                    // and checking for a BigNumber instance using `instanceof` does not work either. We therefore
+                    // compare the constructor functions of the possible BigNumber instance and the BigNumber used by
+                    // Web3.
+                    const web3BigNumber = (Web3.prototype as any).BigNumber;
+                    const isWeb3BigNumber = web3BigNumber.toString() === value.constructor.toString();
+                    return isWeb3BigNumber ?  new BigNumber(value) : value;
+                };
+                event.args = _.mapValues(event.args, wrapIfBigNumber);
+            }
+            eventCallback(err, event);
+        };
+        return bignumberWrappingEventCallback;
+    }
     private async _isValidSignatureUsingContractCallAsync(dataHex: string, ecSignature: ECSignature,
                                                           signerAddressHex: string,
                                                           exchangeContractAddress: string): Promise<boolean> {
diff --git a/src/types.ts b/src/types.ts
index 2af778677..b7ee9c946 100644
--- a/src/types.ts
+++ b/src/types.ts
@@ -237,6 +237,7 @@ export interface LogErrorContractEventArgs {
     orderHash: string;
 }
 export type ContractEventArgs = LogFillContractEventArgs|LogCancelContractEventArgs|LogErrorContractEventArgs;
+export type ContractEventArg = string|BigNumber.BigNumber;
 
 export interface Order {
     maker: string;
diff --git a/test/exchange_wrapper_test.ts b/test/exchange_wrapper_test.ts
index 5833a8c23..2682c5d52 100644
--- a/test/exchange_wrapper_test.ts
+++ b/test/exchange_wrapper_test.ts
@@ -18,6 +18,7 @@ import {
     ExchangeContractErrs,
     OrderCancellationRequest,
     OrderFillRequest,
+    LogFillContractEventArgs,
 } from '../src';
 import {DoneCallback} from '../src/types';
 import {FillScenarios} from './utils/fill_scenarios';
@@ -680,6 +681,12 @@ describe('ExchangeWrapper', () => {
         let makerAddress: string;
         let fillableAmount: BigNumber.BigNumber;
         let signedOrder: SignedOrder;
+        const subscriptionOpts: SubscriptionOpts = {
+            fromBlock: 0,
+            toBlock: 'latest',
+        };
+        const fillTakerAmountInBaseUnits = new BigNumber(1);
+        const cancelTakerAmountInBaseUnits = new BigNumber(1);
         before(() => {
             [coinbase, makerAddress, takerAddress] = userAddresses;
             const [makerToken, takerToken] = tokens;
@@ -702,10 +709,6 @@ describe('ExchangeWrapper', () => {
         // Source: https://github.com/mochajs/mocha/issues/2407
         it('Should receive the LogFill event when an order is filled', (done: DoneCallback) => {
             (async () => {
-                const subscriptionOpts: SubscriptionOpts = {
-                    fromBlock: 0,
-                    toBlock: 'latest',
-                };
                 const zeroExEvent = await zeroEx.exchange.subscribeAsync(
                     ExchangeEvents.LogFill, subscriptionOpts, indexFilterValues, exchangeContractAddress,
                 );
@@ -715,7 +718,6 @@ describe('ExchangeWrapper', () => {
                     expect(event.event).to.be.equal('LogFill');
                     done();
                 });
-                const fillTakerAmountInBaseUnits = new BigNumber(1);
                 await zeroEx.exchange.fillOrderAsync(
                     signedOrder, fillTakerAmountInBaseUnits, shouldCheckTransfer, takerAddress,
                 );
@@ -723,10 +725,6 @@ describe('ExchangeWrapper', () => {
         });
         it('Should receive the LogCancel event when an order is cancelled', (done: DoneCallback) => {
             (async () => {
-                const subscriptionOpts: SubscriptionOpts = {
-                    fromBlock: 0,
-                    toBlock: 'latest',
-                };
                 const zeroExEvent = await zeroEx.exchange.subscribeAsync(
                     ExchangeEvents.LogCancel, subscriptionOpts, indexFilterValues, exchangeContractAddress,
                 );
@@ -736,16 +734,11 @@ describe('ExchangeWrapper', () => {
                         expect(event.event).to.be.equal('LogCancel');
                         done();
                 });
-                const cancelTakerAmountInBaseUnits = new BigNumber(1);
                 await zeroEx.exchange.cancelOrderAsync(signedOrder, cancelTakerAmountInBaseUnits);
             })();
         });
         it('Outstanding subscriptions are cancelled when zeroEx.setProviderAsync called', (done: DoneCallback) => {
             (async () => {
-                const subscriptionOpts: SubscriptionOpts = {
-                    fromBlock: 0,
-                    toBlock: 'latest',
-                };
                 const eventSubscriptionToBeCancelled = await zeroEx.exchange.subscribeAsync(
                     ExchangeEvents.LogFill, subscriptionOpts, indexFilterValues, exchangeContractAddress,
                 );
@@ -765,8 +758,6 @@ describe('ExchangeWrapper', () => {
                     expect(event.event).to.be.equal('LogFill');
                     done();
                 });
-
-                const fillTakerAmountInBaseUnits = new BigNumber(1);
                 await zeroEx.exchange.fillOrderAsync(
                     signedOrder, fillTakerAmountInBaseUnits, shouldCheckTransfer, takerAddress,
                 );
@@ -774,10 +765,6 @@ describe('ExchangeWrapper', () => {
         });
         it('Should stop watch for events when stopWatchingAsync called on the eventEmitter', (done: DoneCallback) => {
             (async () => {
-                const subscriptionOpts: SubscriptionOpts = {
-                    fromBlock: 0,
-                    toBlock: 'latest',
-                };
                 const eventSubscriptionToBeStopped = await zeroEx.exchange.subscribeAsync(
                     ExchangeEvents.LogFill, subscriptionOpts, indexFilterValues, exchangeContractAddress,
                 );
@@ -785,13 +772,30 @@ describe('ExchangeWrapper', () => {
                     done(new Error('Expected this subscription to have been stopped'));
                 });
                 await eventSubscriptionToBeStopped.stopWatchingAsync();
-                const fillTakerAmountInBaseUnits = new BigNumber(1);
                 await zeroEx.exchange.fillOrderAsync(
                     signedOrder, fillTakerAmountInBaseUnits, shouldCheckTransfer, takerAddress,
                 );
                 done();
             })();
         });
+        it('Should wrap all event args BigNumber instances in a newer version of BigNumber', (done: DoneCallback) => {
+            (async () => {
+                const zeroExEvent = await zeroEx.exchange.subscribeAsync(
+                    ExchangeEvents.LogFill, subscriptionOpts, indexFilterValues, exchangeContractAddress,
+                );
+                zeroExEvent.watch((err: Error, event: ContractEvent) => {
+                    const args = event.args as LogFillContractEventArgs;
+                    expect(args.filledValueM.isBigNumber).to.be.true();
+                    expect(args.filledValueT.isBigNumber).to.be.true();
+                    expect(args.feeMPaid.isBigNumber).to.be.true();
+                    expect(args.feeTPaid.isBigNumber).to.be.true();
+                    done();
+                });
+                await zeroEx.exchange.fillOrderAsync(
+                    signedOrder, fillTakerAmountInBaseUnits, shouldCheckTransfer, takerAddress,
+                );
+            })();
+        });
     });
     describe('#getOrderHashHexUsingContractCallAsync', () => {
         let makerTokenAddress: string;
diff --git a/yarn.lock b/yarn.lock
index 58472f85c..4154c136f 100644
--- a/yarn.lock
+++ b/yarn.lock
@@ -72,11 +72,21 @@ acorn-dynamic-import@^2.0.0:
   dependencies:
     acorn "^4.0.3"
 
+acorn-jsx@^3.0.0:
+  version "3.0.1"
+  resolved "https://registry.yarnpkg.com/acorn-jsx/-/acorn-jsx-3.0.1.tgz#afdf9488fb1ecefc8348f6fb22f464e32a58b36b"
+  dependencies:
+    acorn "^3.0.4"
+
+acorn@^3.0.4:
+  version "3.3.0"
+  resolved "https://registry.yarnpkg.com/acorn/-/acorn-3.3.0.tgz#45e37fb39e8da3f25baee3ff5369e2bb5f22017a"
+
 acorn@^4.0.3:
   version "4.0.13"
   resolved "https://registry.yarnpkg.com/acorn/-/acorn-4.0.13.tgz#105495ae5361d697bd195c825192e1ad7f253787"
 
-acorn@^5.0.0:
+acorn@^5.0.0, acorn@^5.0.1:
   version "5.0.3"
   resolved "https://registry.yarnpkg.com/acorn/-/acorn-5.0.3.tgz#c460df08491463f028ccb82eab3730bf01087b3d"
 
@@ -84,7 +94,7 @@ aes-js@^0.2.3:
   version "0.2.4"
   resolved "https://registry.yarnpkg.com/aes-js/-/aes-js-0.2.4.tgz#94b881ab717286d015fa219e08fb66709dda5a3d"
 
-ajv-keywords@^1.1.1:
+ajv-keywords@^1.0.0, ajv-keywords@^1.1.1:
   version "1.5.1"
   resolved "https://registry.yarnpkg.com/ajv-keywords/-/ajv-keywords-1.5.1.tgz#314dd0a4b3368fad3dfcdc54ede6171b886daf3c"
 
@@ -120,6 +130,10 @@ amdefine@>=0.0.4:
   version "1.0.1"
   resolved "https://registry.yarnpkg.com/amdefine/-/amdefine-1.0.1.tgz#4a5282ac164729e93619bcfd3ad151f817ce91f5"
 
+ansi-escapes@^1.1.0:
+  version "1.4.0"
+  resolved "https://registry.yarnpkg.com/ansi-escapes/-/ansi-escapes-1.4.0.tgz#d3a8a83b319aa67793662b13e761c7911422306e"
+
 ansi-regex@^1.0.0, ansi-regex@^1.1.1:
   version "1.1.1"
   resolved "https://registry.yarnpkg.com/ansi-regex/-/ansi-regex-1.1.1.tgz#41c847194646375e6a1a5d10c3ca054ef9fc980d"
@@ -192,7 +206,13 @@ array-reduce@~0.0.0:
   version "0.0.0"
   resolved "https://registry.yarnpkg.com/array-reduce/-/array-reduce-0.0.0.tgz#173899d3ffd1c7d9383e4479525dbe278cab5f2b"
 
-array-uniq@^1.0.0:
+array-union@^1.0.1:
+  version "1.0.2"
+  resolved "https://registry.yarnpkg.com/array-union/-/array-union-1.0.2.tgz#9a34410e4f4e3da23dea375be5be70f24778ec39"
+  dependencies:
+    array-uniq "^1.0.1"
+
+array-uniq@^1.0.0, array-uniq@^1.0.1:
   version "1.0.3"
   resolved "https://registry.yarnpkg.com/array-uniq/-/array-uniq-1.0.3.tgz#af6ac877a25cc7f74e058894753858dfdb24fdb6"
 
@@ -282,7 +302,7 @@ aws4@^1.2.1:
   version "1.6.0"
   resolved "https://registry.yarnpkg.com/aws4/-/aws4-1.6.0.tgz#83ef5ca860b2b32e4a0deedee8c771b9db57471e"
 
-babel-code-frame@^6.22.0:
+babel-code-frame@^6.16.0, babel-code-frame@^6.22.0:
   version "6.22.0"
   resolved "https://registry.yarnpkg.com/babel-code-frame/-/babel-code-frame-6.22.0.tgz#027620bee567a88c32561574e7fd0801d33118e4"
   dependencies:
@@ -897,6 +917,16 @@ caching-transform@^1.0.0:
     mkdirp "^0.5.1"
     write-file-atomic "^1.1.4"
 
+caller-path@^0.1.0:
+  version "0.1.0"
+  resolved "https://registry.yarnpkg.com/caller-path/-/caller-path-0.1.0.tgz#94085ef63581ecd3daa92444a8fe94e82577751f"
+  dependencies:
+    callsites "^0.2.0"
+
+callsites@^0.2.0:
+  version "0.2.0"
+  resolved "https://registry.yarnpkg.com/callsites/-/callsites-0.2.0.tgz#afab96262910a7f33c19a5775825c69f34e350ca"
+
 camelcase-keys@^2.0.0:
   version "2.1.0"
   resolved "https://registry.yarnpkg.com/camelcase-keys/-/camelcase-keys-2.1.0.tgz#308beeaffdf28119051efa1d932213c91b8f92e7"
@@ -941,11 +971,12 @@ chai-as-promised-typescript-typings@0.0.3:
   dependencies:
     chai-typescript-typings "^0.0.0"
 
-chai-as-promised@^6.0.0:
-  version "6.0.0"
-  resolved "https://registry.yarnpkg.com/chai-as-promised/-/chai-as-promised-6.0.0.tgz#1a02a433a6f24dafac63b9c96fa1684db1aa8da6"
+chai-as-promised@^7.1.0:
+  version "7.1.0"
+  resolved "https://registry.yarnpkg.com/chai-as-promised/-/chai-as-promised-7.1.0.tgz#5bc1be34e39e8555785945dd1085222f720577e7"
   dependencies:
     check-error "^1.0.2"
+    eslint "^3.19.0"
 
 chai-bignumber@0xProject/chai-bignumber:
   version "2.0.0"
@@ -1011,10 +1042,24 @@ cipher-base@^1.0.0, cipher-base@^1.0.1, cipher-base@^1.0.3:
   dependencies:
     inherits "^2.0.1"
 
+circular-json@^0.3.1:
+  version "0.3.1"
+  resolved "https://registry.yarnpkg.com/circular-json/-/circular-json-0.3.1.tgz#be8b36aefccde8b3ca7aa2d6afc07a37242c0d2d"
+
+cli-cursor@^1.0.1:
+  version "1.0.2"
+  resolved "https://registry.yarnpkg.com/cli-cursor/-/cli-cursor-1.0.2.tgz#64da3f7d56a54412e59794bd62dc35295e8f2987"
+  dependencies:
+    restore-cursor "^1.0.1"
+
 cli-width@^1.0.1:
   version "1.1.1"
   resolved "https://registry.yarnpkg.com/cli-width/-/cli-width-1.1.1.tgz#a4d293ef67ebb7b88d4a4d42c0ccf00c4d1e366d"
 
+cli-width@^2.0.0:
+  version "2.1.0"
+  resolved "https://registry.yarnpkg.com/cli-width/-/cli-width-2.1.0.tgz#b234ca209b29ef66fc518d9b98d5847b00edf00a"
+
 cliui@^2.1.0:
   version "2.1.0"
   resolved "https://registry.yarnpkg.com/cliui/-/cliui-2.1.0.tgz#4b475760ff80264c762c3a1719032e91c7fea0d1"
@@ -1078,6 +1123,14 @@ concat-map@0.0.1:
   version "0.0.1"
   resolved "https://registry.yarnpkg.com/concat-map/-/concat-map-0.0.1.tgz#d8a96bd77fd68df7793a73036a3ba0d5405d477b"
 
+concat-stream@^1.5.2:
+  version "1.6.0"
+  resolved "https://registry.yarnpkg.com/concat-stream/-/concat-stream-1.6.0.tgz#0aac662fd52be78964d5532f694784e70110acf7"
+  dependencies:
+    inherits "^2.0.3"
+    readable-stream "^2.2.2"
+    typedarray "^0.0.6"
+
 console-browserify@^1.1.0:
   version "1.1.0"
   resolved "https://registry.yarnpkg.com/console-browserify/-/console-browserify-1.1.0.tgz#f0241c45730a9fc6323b206dbf38edc741d0bb10"
@@ -1252,6 +1305,10 @@ deep-extend@~0.4.0:
   version "0.4.2"
   resolved "https://registry.yarnpkg.com/deep-extend/-/deep-extend-0.4.2.tgz#48b699c27e334bf89f10892be432f6e4c7d34a7f"
 
+deep-is@~0.1.3:
+  version "0.1.3"
+  resolved "https://registry.yarnpkg.com/deep-is/-/deep-is-0.1.3.tgz#b369d6fb5dbc13eecf524f91b070feedc357cf34"
+
 default-require-extensions@^1.0.0:
   version "1.0.0"
   resolved "https://registry.yarnpkg.com/default-require-extensions/-/default-require-extensions-1.0.0.tgz#f37ea15d3e13ffd9b437d33e1a75b5fb97874cb8"
@@ -1275,6 +1332,18 @@ defined@~1.0.0:
   version "1.0.0"
   resolved "https://registry.yarnpkg.com/defined/-/defined-1.0.0.tgz#c98d9bcef75674188e110969151199e39b1fa693"
 
+del@^2.0.2:
+  version "2.2.2"
+  resolved "https://registry.yarnpkg.com/del/-/del-2.2.2.tgz#c12c981d067846c84bcaf862cff930d907ffd1a8"
+  dependencies:
+    globby "^5.0.0"
+    is-path-cwd "^1.0.0"
+    is-path-in-cwd "^1.0.0"
+    object-assign "^4.0.1"
+    pify "^2.0.0"
+    pinkie-promise "^2.0.0"
+    rimraf "^2.2.8"
+
 delayed-stream@~1.0.0:
   version "1.0.0"
   resolved "https://registry.yarnpkg.com/delayed-stream/-/delayed-stream-1.0.0.tgz#df3ae199acadfb7d440aaae0b29e2272b24ec619"
@@ -1312,6 +1381,13 @@ dirty-chai@^1.2.2:
   version "1.2.2"
   resolved "https://registry.yarnpkg.com/dirty-chai/-/dirty-chai-1.2.2.tgz#78495e619635f7fe44219aa4c837849bf183142e"
 
+doctrine@^2.0.0:
+  version "2.0.0"
+  resolved "https://registry.yarnpkg.com/doctrine/-/doctrine-2.0.0.tgz#c73d8d2909d22291e1a007a395804da8b665fe63"
+  dependencies:
+    esutils "^2.0.2"
+    isarray "^1.0.0"
+
 dom-walk@^0.1.0:
   version "0.1.1"
   resolved "https://registry.yarnpkg.com/dom-walk/-/dom-walk-0.1.1.tgz#672226dc74c8f799ad35307df936aba11acd6018"
@@ -1493,10 +1569,63 @@ escope@^3.6.0:
     esrecurse "^4.1.0"
     estraverse "^4.1.1"
 
+eslint@^3.19.0:
+  version "3.19.0"
+  resolved "https://registry.yarnpkg.com/eslint/-/eslint-3.19.0.tgz#c8fc6201c7f40dd08941b87c085767386a679acc"
+  dependencies:
+    babel-code-frame "^6.16.0"
+    chalk "^1.1.3"
+    concat-stream "^1.5.2"
+    debug "^2.1.1"
+    doctrine "^2.0.0"
+    escope "^3.6.0"
+    espree "^3.4.0"
+    esquery "^1.0.0"
+    estraverse "^4.2.0"
+    esutils "^2.0.2"
+    file-entry-cache "^2.0.0"
+    glob "^7.0.3"
+    globals "^9.14.0"
+    ignore "^3.2.0"
+    imurmurhash "^0.1.4"
+    inquirer "^0.12.0"
+    is-my-json-valid "^2.10.0"
+    is-resolvable "^1.0.0"
+    js-yaml "^3.5.1"
+    json-stable-stringify "^1.0.0"
+    levn "^0.3.0"
+    lodash "^4.0.0"
+    mkdirp "^0.5.0"
+    natural-compare "^1.4.0"
+    optionator "^0.8.2"
+    path-is-inside "^1.0.1"
+    pluralize "^1.2.1"
+    progress "^1.1.8"
+    require-uncached "^1.0.2"
+    shelljs "^0.7.5"
+    strip-bom "^3.0.0"
+    strip-json-comments "~2.0.1"
+    table "^3.7.8"
+    text-table "~0.2.0"
+    user-home "^2.0.0"
+
+espree@^3.4.0:
+  version "3.4.3"
+  resolved "https://registry.yarnpkg.com/espree/-/espree-3.4.3.tgz#2910b5ccd49ce893c2ffffaab4fd8b3a31b82374"
+  dependencies:
+    acorn "^5.0.1"
+    acorn-jsx "^3.0.0"
+
 esprima@^2.6.0:
   version "2.7.3"
   resolved "https://registry.yarnpkg.com/esprima/-/esprima-2.7.3.tgz#96e3b70d5779f6ad49cd032673d1c312767ba581"
 
+esquery@^1.0.0:
+  version "1.0.0"
+  resolved "https://registry.yarnpkg.com/esquery/-/esquery-1.0.0.tgz#cfba8b57d7fba93f17298a8a006a04cda13d80fa"
+  dependencies:
+    estraverse "^4.0.0"
+
 esrecurse@^4.1.0:
   version "4.2.0"
   resolved "https://registry.yarnpkg.com/esrecurse/-/esrecurse-4.2.0.tgz#fa9568d98d3823f9a41d91e902dcab9ea6e5b163"
@@ -1504,7 +1633,7 @@ esrecurse@^4.1.0:
     estraverse "^4.1.0"
     object-assign "^4.0.1"
 
-estraverse@^4.1.0, estraverse@^4.1.1:
+estraverse@^4.0.0, estraverse@^4.1.0, estraverse@^4.1.1, estraverse@^4.2.0:
   version "4.2.0"
   resolved "https://registry.yarnpkg.com/estraverse/-/estraverse-4.2.0.tgz#0dee3fed31fcd469618ce7342099fc1afa0bdb13"
 
@@ -1686,6 +1815,10 @@ execa@^0.5.0:
     signal-exit "^3.0.0"
     strip-eof "^1.0.0"
 
+exit-hook@^1.0.0:
+  version "1.1.1"
+  resolved "https://registry.yarnpkg.com/exit-hook/-/exit-hook-1.1.1.tgz#f05ca233b48c05d54fff07765df8507e95c02ff8"
+
 expand-brackets@^0.1.4:
   version "0.1.5"
   resolved "https://registry.yarnpkg.com/expand-brackets/-/expand-brackets-0.1.5.tgz#df07284e342a807cd733ac5af72411e581d1177b"
@@ -1726,6 +1859,10 @@ fast-deep-equal@^0.1.0:
   version "0.1.0"
   resolved "https://registry.yarnpkg.com/fast-deep-equal/-/fast-deep-equal-0.1.0.tgz#5c6f4599aba6b333ee3342e2ed978672f1001f8d"
 
+fast-levenshtein@~2.0.4:
+  version "2.0.6"
+  resolved "https://registry.yarnpkg.com/fast-levenshtein/-/fast-levenshtein-2.0.6.tgz#3d8a5c66883a16a30ca8643e851f19baa7797917"
+
 fetch-ponyfill@^4.0.0:
   version "4.0.0"
   resolved "https://registry.yarnpkg.com/fetch-ponyfill/-/fetch-ponyfill-4.0.0.tgz#18cfe38d69cde42aec71cb3ace79e1f2276293da"
@@ -1739,6 +1876,13 @@ figures@^1.3.5:
     escape-string-regexp "^1.0.5"
     object-assign "^4.1.0"
 
+file-entry-cache@^2.0.0:
+  version "2.0.0"
+  resolved "https://registry.yarnpkg.com/file-entry-cache/-/file-entry-cache-2.0.0.tgz#c392990c3e684783d838b8c84a45d8a048458361"
+  dependencies:
+    flat-cache "^1.2.1"
+    object-assign "^4.0.1"
+
 file-type@^3.6.0:
   version "3.9.0"
   resolved "https://registry.yarnpkg.com/file-type/-/file-type-3.9.0.tgz#257a078384d1db8087bc449d107d52a52672b9e9"
@@ -1785,6 +1929,15 @@ find-versions@^2.0.0:
     array-uniq "^1.0.0"
     semver-regex "^1.0.0"
 
+flat-cache@^1.2.1:
+  version "1.2.2"
+  resolved "https://registry.yarnpkg.com/flat-cache/-/flat-cache-1.2.2.tgz#fa86714e72c21db88601761ecf2f555d1abc6b96"
+  dependencies:
+    circular-json "^0.3.1"
+    del "^2.0.2"
+    graceful-fs "^4.1.2"
+    write "^0.2.1"
+
 for-each@^0.3.2, for-each@~0.3.2:
   version "0.3.2"
   resolved "https://registry.yarnpkg.com/for-each/-/for-each-0.3.2.tgz#2c40450b9348e97f281322593ba96704b9abd4d4"
@@ -1984,7 +2137,7 @@ glob@7.1.1:
     once "^1.3.0"
     path-is-absolute "^1.0.0"
 
-glob@^7.0.0, glob@^7.0.5, glob@^7.0.6, glob@^7.1.1, glob@~7.1.1:
+glob@^7.0.0, glob@^7.0.3, glob@^7.0.5, glob@^7.0.6, glob@^7.1.1, glob@~7.1.1:
   version "7.1.2"
   resolved "https://registry.yarnpkg.com/glob/-/glob-7.1.2.tgz#c19c9df9a028702d678612384a6552404c636d15"
   dependencies:
@@ -2002,10 +2155,21 @@ global@~4.3.0:
     min-document "^2.19.0"
     process "~0.5.1"
 
-globals@^9.0.0:
+globals@^9.0.0, globals@^9.14.0:
   version "9.17.0"
   resolved "https://registry.yarnpkg.com/globals/-/globals-9.17.0.tgz#0c0ca696d9b9bb694d2e5470bd37777caad50286"
 
+globby@^5.0.0:
+  version "5.0.0"
+  resolved "https://registry.yarnpkg.com/globby/-/globby-5.0.0.tgz#ebd84667ca0dbb330b99bcfc68eac2bc54370e0d"
+  dependencies:
+    array-union "^1.0.1"
+    arrify "^1.0.0"
+    glob "^7.0.3"
+    object-assign "^4.0.1"
+    pify "^2.0.0"
+    pinkie-promise "^2.0.0"
+
 graceful-fs@^4.1.11, graceful-fs@^4.1.2, graceful-fs@^4.1.6, graceful-fs@^4.1.9:
   version "4.1.11"
   resolved "https://registry.yarnpkg.com/graceful-fs/-/graceful-fs-4.1.11.tgz#0e8bdfe4d1ddb8854d64e04ea7c00e2a026e5658"
@@ -2150,6 +2314,10 @@ ieee754@^1.1.4:
   version "1.1.8"
   resolved "https://registry.yarnpkg.com/ieee754/-/ieee754-1.1.8.tgz#be33d40ac10ef1926701f6f08a2d86fbfd1ad3e4"
 
+ignore@^3.2.0:
+  version "3.3.3"
+  resolved "https://registry.yarnpkg.com/ignore/-/ignore-3.3.3.tgz#432352e57accd87ab3110e82d3fea0e47812156d"
+
 immediate@^3.2.3:
   version "3.2.3"
   resolved "https://registry.yarnpkg.com/immediate/-/immediate-3.2.3.tgz#d140fa8f614659bd6541233097ddaac25cdd991c"
@@ -2187,6 +2355,24 @@ ini@~1.3.0:
   version "1.3.4"
   resolved "https://registry.yarnpkg.com/ini/-/ini-1.3.4.tgz#0537cb79daf59b59a1a517dff706c86ec039162e"
 
+inquirer@^0.12.0:
+  version "0.12.0"
+  resolved "https://registry.yarnpkg.com/inquirer/-/inquirer-0.12.0.tgz#1ef2bfd63504df0bc75785fff8c2c41df12f077e"
+  dependencies:
+    ansi-escapes "^1.1.0"
+    ansi-regex "^2.0.0"
+    chalk "^1.0.0"
+    cli-cursor "^1.0.1"
+    cli-width "^2.0.0"
+    figures "^1.3.5"
+    lodash "^4.3.0"
+    readline2 "^1.0.1"
+    run-async "^0.1.0"
+    rx-lite "^3.1.2"
+    string-width "^1.0.1"
+    strip-ansi "^3.0.0"
+    through "^2.3.6"
+
 inquirer@^0.8.2:
   version "0.8.5"
   resolved "https://registry.yarnpkg.com/inquirer/-/inquirer-0.8.5.tgz#dbd740cf6ca3b731296a63ce6f6d961851f336df"
@@ -2294,7 +2480,7 @@ is-hex-prefixed@1.0.0:
   version "1.0.0"
   resolved "https://registry.yarnpkg.com/is-hex-prefixed/-/is-hex-prefixed-1.0.0.tgz#7d8d37e6ad77e5d127148913c573e082d777f554"
 
-is-my-json-valid@^2.12.4:
+is-my-json-valid@^2.10.0, is-my-json-valid@^2.12.4:
   version "2.16.0"
   resolved "https://registry.yarnpkg.com/is-my-json-valid/-/is-my-json-valid-2.16.0.tgz#f079dd9bfdae65ee2038aae8acbc86ab109e3693"
   dependencies:
@@ -2309,6 +2495,22 @@ is-number@^2.0.2, is-number@^2.1.0:
   dependencies:
     kind-of "^3.0.2"
 
+is-path-cwd@^1.0.0:
+  version "1.0.0"
+  resolved "https://registry.yarnpkg.com/is-path-cwd/-/is-path-cwd-1.0.0.tgz#d225ec23132e89edd38fda767472e62e65f1106d"
+
+is-path-in-cwd@^1.0.0:
+  version "1.0.0"
+  resolved "https://registry.yarnpkg.com/is-path-in-cwd/-/is-path-in-cwd-1.0.0.tgz#6477582b8214d602346094567003be8a9eac04dc"
+  dependencies:
+    is-path-inside "^1.0.0"
+
+is-path-inside@^1.0.0:
+  version "1.0.0"
+  resolved "https://registry.yarnpkg.com/is-path-inside/-/is-path-inside-1.0.0.tgz#fc06e5a1683fbda13de667aff717bbc10a48f37f"
+  dependencies:
+    path-is-inside "^1.0.1"
+
 is-posix-bracket@^0.1.0:
   version "0.1.1"
   resolved "https://registry.yarnpkg.com/is-posix-bracket/-/is-posix-bracket-0.1.1.tgz#3334dc79774368e92f016e6fbc0a88f5cd6e6bc4"
@@ -2327,6 +2529,12 @@ is-regex@^1.0.3:
   dependencies:
     has "^1.0.1"
 
+is-resolvable@^1.0.0:
+  version "1.0.0"
+  resolved "https://registry.yarnpkg.com/is-resolvable/-/is-resolvable-1.0.0.tgz#8df57c61ea2e3c501408d100fb013cf8d6e0cc62"
+  dependencies:
+    tryit "^1.0.1"
+
 is-stream@^1.0.1, is-stream@^1.1.0:
   version "1.1.0"
   resolved "https://registry.yarnpkg.com/is-stream/-/is-stream-1.1.0.tgz#12d4a3dd4e68e0b79ceb8dbc84173ae80d91ca44"
@@ -2441,7 +2649,7 @@ js-tokens@^3.0.0:
   version "3.0.1"
   resolved "https://registry.yarnpkg.com/js-tokens/-/js-tokens-3.0.1.tgz#08e9f132484a2c45a30907e9dc4d5567b7f114d7"
 
-js-yaml@3.6.1:
+js-yaml@3.6.1, js-yaml@^3.5.1:
   version "3.6.1"
   resolved "https://registry.yarnpkg.com/js-yaml/-/js-yaml-3.6.1.tgz#6e5fe67d8b205ce4d22fad05b7781e8dadcc4b30"
   dependencies:
@@ -2482,7 +2690,7 @@ json-schema@0.2.3:
   version "0.2.3"
   resolved "https://registry.yarnpkg.com/json-schema/-/json-schema-0.2.3.tgz#b480c892e59a2f05954ce727bd3f2a4e882f9e13"
 
-json-stable-stringify@^1.0.1:
+json-stable-stringify@^1.0.0, json-stable-stringify@^1.0.1:
   version "1.0.1"
   resolved "https://registry.yarnpkg.com/json-stable-stringify/-/json-stable-stringify-1.0.1.tgz#9a759d39c5f2ff503fd5300646ed445f88c4f9af"
   dependencies:
@@ -2613,6 +2821,13 @@ levelup@^1.2.1:
     semver "~5.1.0"
     xtend "~4.0.0"
 
+levn@^0.3.0, levn@~0.3.0:
+  version "0.3.0"
+  resolved "https://registry.yarnpkg.com/levn/-/levn-0.3.0.tgz#3b09924edf9f083c0490fdd4c0bc4421e04764ee"
+  dependencies:
+    prelude-ls "~1.1.2"
+    type-check "~0.3.2"
+
 load-json-file@^1.0.0:
   version "1.1.0"
   resolved "https://registry.yarnpkg.com/load-json-file/-/load-json-file-1.1.0.tgz#956905708d58b4bab4c2261b04f59f31c99374c0"
@@ -2715,7 +2930,7 @@ lodash@^3.3.1, lodash@^3.6.0:
   version "3.10.1"
   resolved "https://registry.yarnpkg.com/lodash/-/lodash-3.10.1.tgz#5bf45e8e49ba4189e17d482789dfd15bd140b7b6"
 
-lodash@^4.13.1, lodash@^4.14.0, lodash@^4.17.4, lodash@^4.2.0:
+lodash@^4.0.0, lodash@^4.13.1, lodash@^4.14.0, lodash@^4.17.4, lodash@^4.2.0, lodash@^4.3.0:
   version "4.17.4"
   resolved "https://registry.yarnpkg.com/lodash/-/lodash-4.17.4.tgz#78203a4d1c328ae1d86dca6460e369b57f4055ae"
 
@@ -2947,6 +3162,10 @@ mute-stream@0.0.4, mute-stream@~0.0.4:
   version "0.0.4"
   resolved "https://registry.yarnpkg.com/mute-stream/-/mute-stream-0.0.4.tgz#a9219960a6d5d5d046597aee51252c6655f7177e"
 
+mute-stream@0.0.5:
+  version "0.0.5"
+  resolved "https://registry.yarnpkg.com/mute-stream/-/mute-stream-0.0.5.tgz#8fbfabb0a98a253d3184331f9e8deb7372fac6c0"
+
 nan@^2.0.5, nan@^2.0.8, nan@^2.2.1, nan@^2.3.0:
   version "2.6.2"
   resolved "https://registry.yarnpkg.com/nan/-/nan-2.6.2.tgz#e4ff34e6c95fdfb5aecc08de6596f43605a7db45"
@@ -2955,6 +3174,10 @@ native-promise-only@^0.8.1:
   version "0.8.1"
   resolved "https://registry.yarnpkg.com/native-promise-only/-/native-promise-only-0.8.1.tgz#20a318c30cb45f71fe7adfbf7b21c99c1472ef11"
 
+natural-compare@^1.4.0:
+  version "1.4.0"
+  resolved "https://registry.yarnpkg.com/natural-compare/-/natural-compare-1.4.0.tgz#4abebfeed7541f2c27acfb29bdbbd15c8d5ba4f7"
+
 node-abi@^2.0.0:
   version "2.0.3"
   resolved "https://registry.yarnpkg.com/node-abi/-/node-abi-2.0.3.tgz#0ca67e5e667b8e1343549ca17153a815d0bbfdaa"
@@ -3144,6 +3367,10 @@ once@^1.3.0, once@^1.3.1, once@^1.3.3, once@^1.4.0:
   dependencies:
     wrappy "1"
 
+onetime@^1.0.0:
+  version "1.1.0"
+  resolved "https://registry.yarnpkg.com/onetime/-/onetime-1.1.0.tgz#a1f7838f8314c516f05ecefcbc4ccfe04b4ed789"
+
 opn-cli@^3.1.0:
   version "3.1.0"
   resolved "https://registry.yarnpkg.com/opn-cli/-/opn-cli-3.1.0.tgz#f819ae6cae0b411bd0149b8560fe6c88adad20f8"
@@ -3168,6 +3395,17 @@ optimist@^0.6.1:
     minimist "~0.0.1"
     wordwrap "~0.0.2"
 
+optionator@^0.8.2:
+  version "0.8.2"
+  resolved "https://registry.yarnpkg.com/optionator/-/optionator-0.8.2.tgz#364c5e409d3f4d6301d6c0b4c05bba50180aeb64"
+  dependencies:
+    deep-is "~0.1.3"
+    fast-levenshtein "~2.0.4"
+    levn "~0.3.0"
+    prelude-ls "~1.1.2"
+    type-check "~0.3.2"
+    wordwrap "~1.0.0"
+
 os-browserify@^0.2.0:
   version "0.2.1"
   resolved "https://registry.yarnpkg.com/os-browserify/-/os-browserify-0.2.1.tgz#63fc4ccee5d2d7763d26bbf8601078e6c2e0044f"
@@ -3269,6 +3507,10 @@ path-is-absolute@^1.0.0:
   version "1.0.1"
   resolved "https://registry.yarnpkg.com/path-is-absolute/-/path-is-absolute-1.0.1.tgz#174b9268735534ffbc7ace6bf53a5a9e1b5c5f5f"
 
+path-is-inside@^1.0.1:
+  version "1.0.2"
+  resolved "https://registry.yarnpkg.com/path-is-inside/-/path-is-inside-1.0.2.tgz#365417dede44430d1c11af61027facf074bdfc53"
+
 path-key@^2.0.0:
   version "2.0.1"
   resolved "https://registry.yarnpkg.com/path-key/-/path-key-2.0.1.tgz#411cadb574c5a140d3a4b1910d40d80cc9f40b40"
@@ -3345,6 +3587,10 @@ pkginfo@^0.3.0:
   version "0.3.1"
   resolved "https://registry.yarnpkg.com/pkginfo/-/pkginfo-0.3.1.tgz#5b29f6a81f70717142e09e765bbeab97b4f81e21"
 
+pluralize@^1.2.1:
+  version "1.2.1"
+  resolved "https://registry.yarnpkg.com/pluralize/-/pluralize-1.2.1.tgz#d1a21483fd22bb41e58a12fa3421823140897c45"
+
 prebuild-install@^2.0.0:
   version "2.1.2"
   resolved "https://registry.yarnpkg.com/prebuild-install/-/prebuild-install-2.1.2.tgz#d9ae0ca85330e03962d93292f95a8b44c2ebf505"
@@ -3364,6 +3610,10 @@ prebuild-install@^2.0.0:
     tunnel-agent "^0.4.3"
     xtend "4.0.1"
 
+prelude-ls@~1.1.2:
+  version "1.1.2"
+  resolved "https://registry.yarnpkg.com/prelude-ls/-/prelude-ls-1.1.2.tgz#21932a549f5e52ffd9a827f570e04be62a97da54"
+
 preserve@^0.2.0:
   version "0.2.0"
   resolved "https://registry.yarnpkg.com/preserve/-/preserve-0.2.0.tgz#815ed1f6ebc65926f865b310c0713bcb3315ce4b"
@@ -3398,6 +3648,10 @@ progress-stream@^1.0.1:
     speedometer "~0.1.2"
     through2 "~0.2.3"
 
+progress@^1.1.8:
+  version "1.1.8"
+  resolved "https://registry.yarnpkg.com/progress/-/progress-1.1.8.tgz#e260c78f6161cdd9b0e56cc3e0a85de17c7a57be"
+
 progress@^2.0.0:
   version "2.0.0"
   resolved "https://registry.yarnpkg.com/progress/-/progress-2.0.0.tgz#8a1be366bf8fc23db2bd23f10c6fe920b4389d1f"
@@ -3560,7 +3814,7 @@ readable-stream@^1.0.33, readable-stream@~1.1.9:
     isarray "0.0.1"
     string_decoder "~0.10.x"
 
-readable-stream@^2.0.0, readable-stream@^2.0.1, readable-stream@^2.0.2, readable-stream@^2.0.5, readable-stream@^2.0.6, readable-stream@^2.1.4, readable-stream@^2.1.5, readable-stream@^2.2.6, readable-stream@^2.2.9:
+readable-stream@^2.0.0, readable-stream@^2.0.1, readable-stream@^2.0.2, readable-stream@^2.0.5, readable-stream@^2.0.6, readable-stream@^2.1.4, readable-stream@^2.1.5, readable-stream@^2.2.2, readable-stream@^2.2.6, readable-stream@^2.2.9:
   version "2.2.9"
   resolved "https://registry.yarnpkg.com/readable-stream/-/readable-stream-2.2.9.tgz#cf78ec6f4a6d1eb43d26488cac97f042e74b7fc8"
   dependencies:
@@ -3588,6 +3842,14 @@ readline2@^0.1.1:
     mute-stream "0.0.4"
     strip-ansi "^2.0.1"
 
+readline2@^1.0.1:
+  version "1.0.1"
+  resolved "https://registry.yarnpkg.com/readline2/-/readline2-1.0.1.tgz#41059608ffc154757b715d9989d199ffbf372e35"
+  dependencies:
+    code-point-at "^1.0.0"
+    is-fullwidth-code-point "^1.0.0"
+    mute-stream "0.0.5"
+
 rechoir@^0.6.2:
   version "0.6.2"
   resolved "https://registry.yarnpkg.com/rechoir/-/rechoir-0.6.2.tgz#85204b54dba82d5742e28c96756ef43af50e3384"
@@ -3738,6 +4000,17 @@ require-main-filename@^1.0.1:
   version "1.0.1"
   resolved "https://registry.yarnpkg.com/require-main-filename/-/require-main-filename-1.0.1.tgz#97f717b69d48784f5f526a6c5aa8ffdda055a4d1"
 
+require-uncached@^1.0.2:
+  version "1.0.3"
+  resolved "https://registry.yarnpkg.com/require-uncached/-/require-uncached-1.0.3.tgz#4e0d56d6c9662fd31e43011c4b95aa49955421d3"
+  dependencies:
+    caller-path "^0.1.0"
+    resolve-from "^1.0.0"
+
+resolve-from@^1.0.0:
+  version "1.0.1"
+  resolved "https://registry.yarnpkg.com/resolve-from/-/resolve-from-1.0.1.tgz#26cbfe935d1aeeeabb29bc3fe5aeb01e93d44226"
+
 resolve-from@^2.0.0:
   version "2.0.0"
   resolved "https://registry.yarnpkg.com/resolve-from/-/resolve-from-2.0.0.tgz#9480ab20e94ffa1d9e80a804c7ea147611966b57"
@@ -3752,6 +4025,13 @@ resolve@~1.1.7:
   version "1.1.7"
   resolved "https://registry.yarnpkg.com/resolve/-/resolve-1.1.7.tgz#203114d82ad2c5ed9e8e0411b3932875e889e97b"
 
+restore-cursor@^1.0.1:
+  version "1.0.1"
+  resolved "https://registry.yarnpkg.com/restore-cursor/-/restore-cursor-1.0.1.tgz#34661f46886327fed2991479152252df92daa541"
+  dependencies:
+    exit-hook "^1.0.0"
+    onetime "^1.0.0"
+
 resumer@~0.0.0:
   version "0.0.0"
   resolved "https://registry.yarnpkg.com/resumer/-/resumer-0.0.0.tgz#f1e8f461e4064ba39e82af3cdc2a8c893d076759"
@@ -3781,6 +4061,16 @@ rlp@^2.0.0:
   version "2.0.0"
   resolved "https://registry.yarnpkg.com/rlp/-/rlp-2.0.0.tgz#9db384ff4b89a8f61563d92395d8625b18f3afb0"
 
+run-async@^0.1.0:
+  version "0.1.0"
+  resolved "https://registry.yarnpkg.com/run-async/-/run-async-0.1.0.tgz#c8ad4a5e110661e402a7d21b530e009f25f8e389"
+  dependencies:
+    once "^1.3.0"
+
+rx-lite@^3.1.2:
+  version "3.1.2"
+  resolved "https://registry.yarnpkg.com/rx-lite/-/rx-lite-3.1.2.tgz#19ce502ca572665f3b647b10939f97fd1615f102"
+
 rx@^2.4.3:
   version "2.5.3"
   resolved "https://registry.yarnpkg.com/rx/-/rx-2.5.3.tgz#21adc7d80f02002af50dae97fd9dbf248755f566"
@@ -3884,7 +4174,7 @@ shell-quote@^1.6.1:
     array-reduce "~0.0.0"
     jsonify "~0.0.0"
 
-shelljs@^0.7.0, shelljs@^0.7.3:
+shelljs@^0.7.0, shelljs@^0.7.3, shelljs@^0.7.5:
   version "0.7.7"
   resolved "https://registry.yarnpkg.com/shelljs/-/shelljs-0.7.7.tgz#b2f5c77ef97148f4b4f6e22682e10bba8667cff1"
   dependencies:
@@ -3933,6 +4223,10 @@ slash@^1.0.0:
   version "1.0.0"
   resolved "https://registry.yarnpkg.com/slash/-/slash-1.0.0.tgz#c41f2f6c39fc16d1cd17ad4b5d896114ae470d55"
 
+slice-ansi@0.0.4:
+  version "0.0.4"
+  resolved "https://registry.yarnpkg.com/slice-ansi/-/slice-ansi-0.0.4.tgz#edbf8903f66f7ce2f8eafd6ceed65e264c831b35"
+
 slide@^1.1.5:
   version "1.1.6"
   resolved "https://registry.yarnpkg.com/slide/-/slide-1.1.6.tgz#56eb027d65b4d2dce6cb2e2d32c4d4afc9e1d707"
@@ -4160,6 +4454,17 @@ supports-color@^2.0.0:
   version "2.0.0"
   resolved "https://registry.yarnpkg.com/supports-color/-/supports-color-2.0.0.tgz#535d045ce6b6363fa40117084629995e9df324c7"
 
+table@^3.7.8:
+  version "3.8.3"
+  resolved "https://registry.yarnpkg.com/table/-/table-3.8.3.tgz#2bbc542f0fda9861a755d3947fefd8b3f513855f"
+  dependencies:
+    ajv "^4.7.0"
+    ajv-keywords "^1.0.0"
+    chalk "^1.1.1"
+    lodash "^4.0.0"
+    slice-ansi "0.0.4"
+    string-width "^2.0.0"
+
 tapable@^0.2.5, tapable@~0.2.5:
   version "0.2.6"
   resolved "https://registry.yarnpkg.com/tapable/-/tapable-0.2.6.tgz#206be8e188860b514425375e6f1ae89bfb01fd8d"
@@ -4246,6 +4551,10 @@ text-encoding@0.6.4:
   version "0.6.4"
   resolved "https://registry.yarnpkg.com/text-encoding/-/text-encoding-0.6.4.tgz#e399a982257a276dae428bb92845cb71bdc26d19"
 
+text-table@~0.2.0:
+  version "0.2.0"
+  resolved "https://registry.yarnpkg.com/text-table/-/text-table-0.2.0.tgz#7f5ee823ae805207c00af2df4a84ec3fcfa570b4"
+
 through2@^2.0.1:
   version "2.0.3"
   resolved "https://registry.yarnpkg.com/through2/-/through2-2.0.3.tgz#0004569b37c7c74ba39c43f3ced78d1ad94140be"
@@ -4333,6 +4642,10 @@ truffle-hdwallet-provider@^0.0.3:
     web3 "^0.18.2"
     web3-provider-engine "^8.4.0"
 
+tryit@^1.0.1:
+  version "1.0.3"
+  resolved "https://registry.yarnpkg.com/tryit/-/tryit-1.0.3.tgz#393be730a9446fd1ead6da59a014308f36c289cb"
+
 tslib@^1.7.1:
   version "1.7.1"
   resolved "https://registry.yarnpkg.com/tslib/-/tslib-1.7.1.tgz#bc8004164691923a79fe8378bbeb3da2017538ec"
@@ -4383,6 +4696,12 @@ tweetnacl@^0.14.3, tweetnacl@~0.14.0:
   version "0.14.5"
   resolved "https://registry.yarnpkg.com/tweetnacl/-/tweetnacl-0.14.5.tgz#5ae68177f192d4456269d108afa93ff8743f4f64"
 
+type-check@~0.3.2:
+  version "0.3.2"
+  resolved "https://registry.yarnpkg.com/type-check/-/type-check-0.3.2.tgz#5884cab512cf1d355e3fb784f30804b2b520db72"
+  dependencies:
+    prelude-ls "~1.1.2"
+
 type-detect@^3.0.0:
   version "3.0.0"
   resolved "https://registry.yarnpkg.com/type-detect/-/type-detect-3.0.0.tgz#46d0cc8553abb7b13a352b0d6dea2fd58f2d9b55"
@@ -4391,6 +4710,10 @@ type-detect@^4.0.0:
   version "4.0.3"
   resolved "https://registry.yarnpkg.com/type-detect/-/type-detect-4.0.3.tgz#0e3f2670b44099b0b46c284d136a7ef49c74c2ea"
 
+typedarray@^0.0.6:
+  version "0.0.6"
+  resolved "https://registry.yarnpkg.com/typedarray/-/typedarray-0.0.6.tgz#867ac74e3864187b1d3d47d996a78ec5c8830777"
+
 typedoc-default-themes@^0.5.0:
   version "0.5.0"
   resolved "https://registry.yarnpkg.com/typedoc-default-themes/-/typedoc-default-themes-0.5.0.tgz#6dc2433e78ed8bea8e887a3acde2f31785bd6227"
@@ -4478,6 +4801,12 @@ url@^0.11.0:
     punycode "1.3.2"
     querystring "0.2.0"
 
+user-home@^2.0.0:
+  version "2.0.0"
+  resolved "https://registry.yarnpkg.com/user-home/-/user-home-2.0.0.tgz#9c70bfd8169bc1dcbf48604e0f04b8b49cde9e9f"
+  dependencies:
+    os-homedir "^1.0.0"
+
 utf8@^2.1.1:
   version "2.1.2"
   resolved "https://registry.yarnpkg.com/utf8/-/utf8-2.1.2.tgz#1fa0d9270e9be850d9b05027f63519bf46457d96"
@@ -4570,25 +4899,6 @@ web3-provider-engine@^8.4.0:
     xhr "^2.2.0"
     xtend "^4.0.1"
 
-web3-provider-engine@~8.1.0:
-  version "8.1.19"
-  resolved "https://registry.yarnpkg.com/web3-provider-engine/-/web3-provider-engine-8.1.19.tgz#3ccae95adecef55632e2a73bf3bee64b7e62fcf7"
-  dependencies:
-    async "^2.1.2"
-    clone "^2.0.0"
-    ethereumjs-block "^1.2.2"
-    ethereumjs-tx "^1.2.0"
-    ethereumjs-util "^5.0.1"
-    ethereumjs-vm "^2.0.2"
-    isomorphic-fetch "^2.2.0"
-    request "^2.67.0"
-    semaphore "^1.0.3"
-    solc "^0.4.2"
-    tape "^4.4.0"
-    web3 "^0.16.0"
-    xhr "^2.2.0"
-    xtend "^4.0.1"
-
 web3-typescript-typings@^0.0.10:
   version "0.0.10"
   resolved "https://registry.yarnpkg.com/web3-typescript-typings/-/web3-typescript-typings-0.0.10.tgz#8108c80f252fedb5c1670a547da4554112dbd44d"
@@ -4731,6 +5041,10 @@ wordwrap@~0.0.2:
   version "0.0.3"
   resolved "https://registry.yarnpkg.com/wordwrap/-/wordwrap-0.0.3.tgz#a3d5da6cd5c0bc0008d37234bbaf1bed63059107"
 
+wordwrap@~1.0.0:
+  version "1.0.0"
+  resolved "https://registry.yarnpkg.com/wordwrap/-/wordwrap-1.0.0.tgz#27584810891456a4171c8d0226441ade90cbcaeb"
+
 wrap-ansi@^2.0.0:
   version "2.1.0"
   resolved "https://registry.yarnpkg.com/wrap-ansi/-/wrap-ansi-2.1.0.tgz#d8fc3d284dd05794fe84973caecdd1cf824fdd85"
@@ -4750,6 +5064,12 @@ write-file-atomic@^1.1.4:
     imurmurhash "^0.1.4"
     slide "^1.1.5"
 
+write@^0.2.1:
+  version "0.2.1"
+  resolved "https://registry.yarnpkg.com/write/-/write-0.2.1.tgz#5fc03828e264cea3fe91455476f7a3c566cb0757"
+  dependencies:
+    mkdirp "^0.5.1"
+
 xhr2@*:
   version "0.1.4"
   resolved "https://registry.yarnpkg.com/xhr2/-/xhr2-0.1.4.tgz#7f87658847716db5026323812f818cadab387a5f"