diff --git a/package.json b/package.json
index 4a2daa9f5..b6d19af64 100644
--- a/package.json
+++ b/package.json
@@ -4,6 +4,7 @@
     "private": true,
     "dependencies": {
         "0x.js": "^6.0.11",
+        "@0x/asset-buyer": "^6.1.9",
         "@0x/connect": "^5.0.12",
         "@0x/web3-wrapper": "^6.0.6",
         "@types/async-retry": "^1.4.1",
diff --git a/src/services/contract_wrappers.ts b/src/services/contract_wrappers.ts
index 493e64094..bc0b59889 100644
--- a/src/services/contract_wrappers.ts
+++ b/src/services/contract_wrappers.ts
@@ -9,7 +9,9 @@ let contractWrappers: ContractWrappers;
 export const getContractWrappers = async () => {
     if (!contractWrappers) {
         const web3Wrapper = await getWeb3Wrapper();
-        contractWrappers = new ContractWrappers(web3Wrapper.getProvider(), { networkId: NETWORK_ID });
+        contractWrappers = new ContractWrappers(web3Wrapper.getProvider(), {
+            networkId: NETWORK_ID,
+        });
     }
 
     return contractWrappers;
diff --git a/src/services/web3_wrapper.ts b/src/services/web3_wrapper.ts
index 985a0ea29..75f81b167 100644
--- a/src/services/web3_wrapper.ts
+++ b/src/services/web3_wrapper.ts
@@ -1,3 +1,4 @@
+import { MetamaskSubprovider } from '0x.js';
 import { Web3Wrapper } from '@0x/web3-wrapper';
 
 import { sleep } from '../util/sleep';
@@ -18,16 +19,16 @@ export const initializeWeb3Wrapper = async (): Promise<Web3Wrapper | null> => {
 
     if (ethereum) {
         try {
-            web3Wrapper = new Web3Wrapper(ethereum);
+            web3Wrapper = new Web3Wrapper(new MetamaskSubprovider(ethereum));
             // Request account access if needed
             await ethereum.enable();
 
             // Subscriptions register
-            ethereum.on('accountsChanged', async (accounts: []) => {
+            ethereum.on('accountsChanged', async (_accounts: []) => {
                 // Reload to avoid MetaMask bug: "MetaMask - RPC Error: Internal JSON-RPC"
                 location.reload();
             });
-            ethereum.on('networkChanged', async (network: number) => {
+            ethereum.on('networkChanged', async (_network: number) => {
                 location.reload();
             });
 
@@ -37,7 +38,7 @@ export const initializeWeb3Wrapper = async (): Promise<Web3Wrapper | null> => {
             return null;
         }
     } else if (web3) {
-        web3Wrapper = new Web3Wrapper(web3.currentProvider);
+        web3Wrapper = new Web3Wrapper(new MetamaskSubprovider(web3.currentProvider));
         return web3Wrapper;
     } else {
         //  The user does not have metamask installed
diff --git a/src/store/blockchain/actions.ts b/src/store/blockchain/actions.ts
index c7e56d9b9..f7c491579 100644
--- a/src/store/blockchain/actions.ts
+++ b/src/store/blockchain/actions.ts
@@ -1,5 +1,5 @@
 // tslint:disable:max-file-line-count
-import { BigNumber, MetamaskSubprovider, signatureUtils } from '0x.js';
+import { BigNumber, signatureUtils } from '0x.js';
 import { createAction, createAsyncAction } from 'typesafe-actions';
 
 import { COLLECTIBLE_ADDRESS, NETWORK_ID, START_BLOCK_LIMIT } from '../../common/constants';
@@ -483,8 +483,7 @@ export const createSignedCollectibleOrder: ThunkCreator = (
                 );
             }
 
-            const provider = new MetamaskSubprovider(web3Wrapper.getProvider());
-            return signatureUtils.ecSignOrderAsync(provider, order, ethAccount);
+            return signatureUtils.ecSignOrderAsync(web3Wrapper.getProvider(), order, ethAccount);
         } catch (error) {
             throw new SignedOrderException(error.message);
         }
diff --git a/src/store/collectibles/actions.ts b/src/store/collectibles/actions.ts
index b68b3219c..e62ca4fc8 100644
--- a/src/store/collectibles/actions.ts
+++ b/src/store/collectibles/actions.ts
@@ -1,4 +1,4 @@
-import { MetamaskSubprovider, signatureUtils, SignedOrder } from '0x.js';
+import { signatureUtils, SignedOrder } from '0x.js';
 import { createAction, createAsyncAction } from 'typesafe-actions';
 
 import { ZERO_ADDRESS } from '../../common/constants';
@@ -65,8 +65,11 @@ export const submitBuyCollectible: ThunkCreator<Promise<string>> = (order: Signe
                 takerAssetAmount: order.makerAssetAmount,
             };
 
-            const provider = new MetamaskSubprovider(web3Wrapper.getProvider());
-            const buySignedOrder = await signatureUtils.ecSignOrderAsync(provider, buyOrder, ethAccount);
+            const buySignedOrder = await signatureUtils.ecSignOrderAsync(
+                web3Wrapper.getProvider(),
+                buyOrder,
+                ethAccount,
+            );
             tx = await contractWrappers.dutchAuction.matchOrdersAsync(buySignedOrder, order, ethAccount, gasOptions);
         } else {
             tx = await contractWrappers.forwarder.marketBuyOrdersWithEthAsync(
diff --git a/src/store/relayer/actions.ts b/src/store/relayer/actions.ts
index f21b0569e..8d1198d69 100644
--- a/src/store/relayer/actions.ts
+++ b/src/store/relayer/actions.ts
@@ -1,7 +1,8 @@
-import { BigNumber, SignedOrder } from '0x.js';
+import { assetDataUtils, BigNumber, SignedOrder } from '0x.js';
+import { AssetBuyer } from '@0x/asset-buyer';
 import { createAction } from 'typesafe-actions';
 
-import { ZERO_ADDRESS } from '../../common/constants';
+import { NETWORK_ID, RELAYER_URL } from '../../common/constants';
 import { INSUFFICIENT_ORDERS_TO_FILL_AMOUNT_ERR } from '../../exceptions/common';
 import { InsufficientOrdersAmountException } from '../../exceptions/insufficient_orders_amount_exception';
 import { RelayerException } from '../../exceptions/relayer_exception';
@@ -184,26 +185,25 @@ export const submitMarketOrder: ThunkCreator<Promise<{ txHash: string; amountInR
             const quoteToken = getQuoteToken(state) as Token;
             const contractWrappers = await getContractWrappers();
 
-            // Check if the order is fillable using the forwarder
-            const ethBalance = getEthBalance(state) as BigNumber;
-            const ethAmountRequired = amounts.reduce((total: BigNumber, currentValue: BigNumber) => {
-                return total.plus(currentValue);
-            }, new BigNumber(0));
-            const isEthBalanceEnough = ethBalance.isGreaterThan(ethAmountRequired);
+            const assetBuyer = AssetBuyer.getAssetBuyerForStandardRelayerAPIUrl(
+                contractWrappers.getProvider(),
+                RELAYER_URL,
+                {
+                    networkId: NETWORK_ID,
+                },
+            );
+            const buyQuote = await assetBuyer.getBuyQuoteAsync(
+                assetDataUtils.encodeERC20AssetData(baseToken.address),
+                amount,
+            );
+            const ethBalance = getEthBalance(state);
+            const isEthBalanceEnough = ethBalance.isGreaterThan(buyQuote.worstCaseQuoteInfo.totalEthAmount);
+
             const isMarketBuyForwarder = isBuy && isWeth(quoteToken.symbol) && isEthBalanceEnough;
 
             let txHash;
             if (isMarketBuyForwarder) {
-                txHash = await contractWrappers.forwarder.marketBuyOrdersWithEthAsync(
-                    ordersToFill,
-                    amount,
-                    ethAccount,
-                    ethAmountRequired,
-                    [],
-                    0,
-                    ZERO_ADDRESS,
-                    getTransactionOptions(gasPrice),
-                );
+                txHash = await assetBuyer.executeBuyQuoteAsync(buyQuote);
             } else {
                 txHash = await contractWrappers.exchange.batchFillOrdersAsync(
                     ordersToFill,
diff --git a/src/store/ui/actions.ts b/src/store/ui/actions.ts
index c90c799d9..a9d2c24ad 100644
--- a/src/store/ui/actions.ts
+++ b/src/store/ui/actions.ts
@@ -1,4 +1,4 @@
-import { BigNumber, MetamaskSubprovider, signatureUtils } from '0x.js';
+import { BigNumber, signatureUtils } from '0x.js';
 import { createAction } from 'typesafe-actions';
 
 import { COLLECTIBLE_ADDRESS } from '../../common/constants';
@@ -289,8 +289,7 @@ export const createSignedOrder: ThunkCreator = (amount: BigNumber, price: BigNum
                 side,
             );
 
-            const provider = new MetamaskSubprovider(web3Wrapper.getProvider());
-            return signatureUtils.ecSignOrderAsync(provider, order, ethAccount);
+            return signatureUtils.ecSignOrderAsync(web3Wrapper.getProvider(), order, ethAccount);
         } catch (error) {
             throw new SignedOrderException(error.message);
         }
diff --git a/yarn.lock b/yarn.lock
index bb766883f..4cc16bcc3 100644
--- a/yarn.lock
+++ b/yarn.lock
@@ -5,7 +5,6 @@
 "0x.js@^6.0.11":
   version "6.0.11"
   resolved "https://registry.npmjs.org/0x.js/-/0x.js-6.0.11.tgz#33968367fc8f12a630cee67a5412b55a04b05d7a"
-  integrity sha512-ax5xLwDUzccRwilIJ5h8y7Mf/2sJRpNoOIfVmeenPIO54A4uJm5WraiudHS159fYiTN2kILaDC2L2rlSJlrRUw==
   dependencies:
     "@0x/assert" "^2.1.0"
     "@0x/base-contract" "^5.1.1"
@@ -26,12 +25,19 @@
 "@0x/abi-gen-wrappers@^5.0.1":
   version "5.0.1"
   resolved "https://registry.npmjs.org/@0x/abi-gen-wrappers/-/abi-gen-wrappers-5.0.1.tgz#c3683fc7e6cc71033ab1cc8a7e616743f321583a"
-  integrity sha512-Qbbcej+dgO4Dubjz9/Jd8i4NlKQ2rBJha5PNpL8bJmPhqgvgLaUQaDQoUuday59FJ7HZ6LImVfQwx1dS53K16w==
   dependencies:
     "@0x/base-contract" "^5.1.1"
     "@0x/contract-addresses" "^3.0.1"
     "@0x/contract-artifacts" "^2.0.1"
 
+"@0x/abi-gen-wrappers@^5.0.3":
+  version "5.0.3"
+  resolved "https://registry.yarnpkg.com/@0x/abi-gen-wrappers/-/abi-gen-wrappers-5.0.3.tgz#ef8ebf0519cd643fdf5b205f4079f6c083694b98"
+  dependencies:
+    "@0x/base-contract" "^5.1.2"
+    "@0x/contract-addresses" "^3.0.2"
+    "@0x/contract-artifacts" "^2.0.2"
+
 "@0x/assert@^2.0.10":
   version "2.0.10"
   resolved "https://registry.yarnpkg.com/@0x/assert/-/assert-2.0.10.tgz#e1cfc7142b5dd7ee6510a676703935cf8ffd432e"
@@ -45,7 +51,6 @@
 "@0x/assert@^2.1.0":
   version "2.1.0"
   resolved "https://registry.npmjs.org/@0x/assert/-/assert-2.1.0.tgz#9a129fd6cd697b4332cdf517048aad14d4af7c16"
-  integrity sha512-hSCzzNokQJ6Or55XuxBFFy6V9n+DmO2ijHESmQld/hH+wYuEMqVEHVaLf0+0GTt1txwljrBRTpxyhkVujh5bjw==
   dependencies:
     "@0x/json-schemas" "^3.0.11"
     "@0x/typescript-typings" "^4.2.3"
@@ -53,10 +58,36 @@
     lodash "^4.17.11"
     valid-url "^1.0.9"
 
+"@0x/assert@^2.1.1":
+  version "2.1.1"
+  resolved "https://registry.yarnpkg.com/@0x/assert/-/assert-2.1.1.tgz#53c0023ab0664cdb3546f076265309caaaf86885"
+  dependencies:
+    "@0x/json-schemas" "^3.1.11"
+    "@0x/typescript-typings" "^4.2.4"
+    "@0x/utils" "^4.4.1"
+    lodash "^4.17.11"
+    valid-url "^1.0.9"
+
+"@0x/asset-buyer@^6.1.9":
+  version "6.1.9"
+  resolved "https://registry.yarnpkg.com/@0x/asset-buyer/-/asset-buyer-6.1.9.tgz#675e7d76b48985ab7fa6b98b8bd6f3b953832814"
+  dependencies:
+    "@0x/assert" "^2.1.1"
+    "@0x/connect" "^5.0.14"
+    "@0x/contract-wrappers" "^9.1.8"
+    "@0x/json-schemas" "^3.1.11"
+    "@0x/order-utils" "^8.2.3"
+    "@0x/subproviders" "^4.1.2"
+    "@0x/types" "^2.4.1"
+    "@0x/typescript-typings" "^4.2.4"
+    "@0x/utils" "^4.4.1"
+    "@0x/web3-wrapper" "^6.0.8"
+    ethereum-types "^2.1.4"
+    lodash "^4.17.11"
+
 "@0x/base-contract@^5.1.1":
   version "5.1.1"
   resolved "https://registry.npmjs.org/@0x/base-contract/-/base-contract-5.1.1.tgz#5a985f381813cd26ae805d65447fb28f20f594fd"
-  integrity sha512-+S4EYWi2BNg5QC61xJtCbaCUJf1XtGM6+GWNWh3N059ZFfpUGvKoNRA3H0PnXLItdpDwPlAM/R8Y0PQzef+W6A==
   dependencies:
     "@0x/assert" "^2.1.0"
     "@0x/json-schemas" "^3.0.11"
@@ -67,10 +98,22 @@
     ethers "~4.0.4"
     lodash "^4.17.11"
 
+"@0x/base-contract@^5.1.2":
+  version "5.1.2"
+  resolved "https://registry.yarnpkg.com/@0x/base-contract/-/base-contract-5.1.2.tgz#4605f373c2a235c358172af312a1ccb2f27a4491"
+  dependencies:
+    "@0x/assert" "^2.1.1"
+    "@0x/json-schemas" "^3.1.11"
+    "@0x/typescript-typings" "^4.2.4"
+    "@0x/utils" "^4.4.1"
+    "@0x/web3-wrapper" "^6.0.8"
+    ethereum-types "^2.1.4"
+    ethers "~4.0.4"
+    lodash "^4.17.11"
+
 "@0x/connect@^5.0.12":
   version "5.0.12"
   resolved "https://registry.npmjs.org/@0x/connect/-/connect-5.0.12.tgz#72accc6cf49b81b2eaf3125e86f9cc25e470e473"
-  integrity sha512-mS0phQ4EHymBOi/PdOLRzyfRuWzNiueA9uTjb0yPnFEH/GScLHYODjlpxRYYCYmpoVXmTbu8pMUtaOsaNueesA==
   dependencies:
     "@0x/assert" "^2.1.0"
     "@0x/json-schemas" "^3.0.11"
@@ -84,22 +127,45 @@
     uuid "^3.3.2"
     websocket "^1.0.26"
 
+"@0x/connect@^5.0.14":
+  version "5.0.14"
+  resolved "https://registry.yarnpkg.com/@0x/connect/-/connect-5.0.14.tgz#a7c8a479b0c71340294f2dd49c4f8cb393805f79"
+  dependencies:
+    "@0x/assert" "^2.1.1"
+    "@0x/json-schemas" "^3.1.11"
+    "@0x/order-utils" "^8.2.3"
+    "@0x/types" "^2.4.1"
+    "@0x/typescript-typings" "^4.2.4"
+    "@0x/utils" "^4.4.1"
+    lodash "^4.17.11"
+    query-string "^6.0.0"
+    sinon "^4.0.0"
+    uuid "^3.3.2"
+    websocket "^1.0.26"
+
 "@0x/contract-addresses@^3.0.1":
   version "3.0.1"
   resolved "https://registry.npmjs.org/@0x/contract-addresses/-/contract-addresses-3.0.1.tgz#96c2fcfeb79efa1543c3027aa9aef3cb28de54cb"
-  integrity sha512-CQLiAVYEV+ltrPoapNAPjd8A7Lwe5pdxzIF1MmE1Uj+pyl99T/oxkewhR4dwBtee9vaBq9vJ/KQ+KhCnBuOzCw==
+  dependencies:
+    lodash "^4.17.11"
+
+"@0x/contract-addresses@^3.0.2":
+  version "3.0.2"
+  resolved "https://registry.yarnpkg.com/@0x/contract-addresses/-/contract-addresses-3.0.2.tgz#3dab5e762d6a6627667cd947f273a0ccc7d7e9a7"
   dependencies:
     lodash "^4.17.11"
 
 "@0x/contract-artifacts@^2.0.1":
   version "2.0.1"
   resolved "https://registry.npmjs.org/@0x/contract-artifacts/-/contract-artifacts-2.0.1.tgz#055c3f0d961ff923291cbf2ee29d9ad14a9b6a65"
-  integrity sha512-ogS5Xc1JvlZ/PD7Hi+AzjqmPoPCh22D4+8sWEVVrbpXBT6IRU9ngK2yPikB/Jszq7lxZHe6sutIRGGAIqvzsbQ==
+
+"@0x/contract-artifacts@^2.0.2":
+  version "2.0.2"
+  resolved "https://registry.yarnpkg.com/@0x/contract-artifacts/-/contract-artifacts-2.0.2.tgz#2704c9484a83724ba1b6eaccc428365e51f6f961"
 
 "@0x/contract-wrappers@^9.1.6":
   version "9.1.6"
   resolved "https://registry.npmjs.org/@0x/contract-wrappers/-/contract-wrappers-9.1.6.tgz#4dce156052e01c2cc7106441f28169f78d631e24"
-  integrity sha512-k50SDfuXn58+aOQgn3Sg0Ydq08mkMPQ3najH7QiJwFyrfO+9csCJRmsE/SbjVe6oAOvKSQ3BqNSKLj6tZocCdw==
   dependencies:
     "@0x/abi-gen-wrappers" "^5.0.1"
     "@0x/assert" "^2.1.0"
@@ -121,10 +187,33 @@
     lodash "^4.17.11"
     uuid "^3.3.2"
 
+"@0x/contract-wrappers@^9.1.8":
+  version "9.1.8"
+  resolved "https://registry.yarnpkg.com/@0x/contract-wrappers/-/contract-wrappers-9.1.8.tgz#5923d35af3e4b442a57d02f74e02620b2d5b1356"
+  dependencies:
+    "@0x/abi-gen-wrappers" "^5.0.3"
+    "@0x/assert" "^2.1.1"
+    "@0x/contract-addresses" "^3.0.2"
+    "@0x/contract-artifacts" "^2.0.2"
+    "@0x/json-schemas" "^3.1.11"
+    "@0x/order-utils" "^8.2.3"
+    "@0x/types" "^2.4.1"
+    "@0x/typescript-typings" "^4.2.4"
+    "@0x/utils" "^4.4.1"
+    "@0x/web3-wrapper" "^6.0.8"
+    ethereum-types "^2.1.4"
+    ethereumjs-abi "0.6.5"
+    ethereumjs-blockstream "6.0.0"
+    ethereumjs-util "^5.1.1"
+    ethers "~4.0.4"
+    http-status-codes "^1.3.2"
+    js-sha3 "^0.7.0"
+    lodash "^4.17.11"
+    uuid "^3.3.2"
+
 "@0x/fill-scenarios@^3.0.12":
   version "3.0.12"
   resolved "https://registry.npmjs.org/@0x/fill-scenarios/-/fill-scenarios-3.0.12.tgz#a0fb6d2e226e62b3fd4459074fc1d3c09105ae97"
-  integrity sha512-bJnZ7nEUHQuAg9pr8rypPnEpPfhddHqMFFpyYt8KMN3Kzp8Qmf1SvYgEzWCpwl93UeyR8AmBfy38sqWyuvBKaA==
   dependencies:
     "@0x/abi-gen-wrappers" "^5.0.1"
     "@0x/base-contract" "^5.1.1"
@@ -149,17 +238,24 @@
 "@0x/json-schemas@^3.0.11":
   version "3.0.11"
   resolved "https://registry.npmjs.org/@0x/json-schemas/-/json-schemas-3.0.11.tgz#895e2eeab3a9c5ce3cac796a2bdf1a9733a8b79b"
-  integrity sha512-mQTNJcRJwGIAJhbFOwPhEnh/8O2bSWwTxr0oMOzwJQt3RCUetvu/YJdY4V657mfQ5svu1ifH3yqOG39gFrKrEQ==
   dependencies:
     "@0x/typescript-typings" "^4.2.3"
     "@types/node" "*"
     jsonschema "^1.2.0"
     lodash.values "^4.3.0"
 
+"@0x/json-schemas@^3.1.11":
+  version "3.1.11"
+  resolved "https://registry.yarnpkg.com/@0x/json-schemas/-/json-schemas-3.1.11.tgz#57de26f30a9949fff3866ddeeaeab1f710c32f28"
+  dependencies:
+    "@0x/typescript-typings" "^4.2.4"
+    "@types/node" "*"
+    jsonschema "^1.2.0"
+    lodash.values "^4.3.0"
+
 "@0x/order-utils@^8.2.1":
   version "8.2.1"
   resolved "https://registry.npmjs.org/@0x/order-utils/-/order-utils-8.2.1.tgz#d71d8abd4c587c6f7cbab296ddf0ea94522a415e"
-  integrity sha512-JsUCtyepWiDH3Syh9/zwNPa1ZGp6jPpS5MLASHgjM3vcYKzMsDKA+M2q0xR7Zb8+G6mET492iqCcNCiOu6n6wA==
   dependencies:
     "@0x/abi-gen-wrappers" "^5.0.1"
     "@0x/assert" "^2.1.0"
@@ -179,10 +275,31 @@
     ethers "~4.0.4"
     lodash "^4.17.11"
 
+"@0x/order-utils@^8.2.3":
+  version "8.2.3"
+  resolved "https://registry.yarnpkg.com/@0x/order-utils/-/order-utils-8.2.3.tgz#50389369e1f0d0d5b6875a99e7499ce463941aaa"
+  dependencies:
+    "@0x/abi-gen-wrappers" "^5.0.3"
+    "@0x/assert" "^2.1.1"
+    "@0x/base-contract" "^5.1.2"
+    "@0x/contract-addresses" "^3.0.2"
+    "@0x/contract-artifacts" "^2.0.2"
+    "@0x/json-schemas" "^3.1.11"
+    "@0x/types" "^2.4.1"
+    "@0x/typescript-typings" "^4.2.4"
+    "@0x/utils" "^4.4.1"
+    "@0x/web3-wrapper" "^6.0.8"
+    "@types/node" "*"
+    bn.js "^4.11.8"
+    ethereum-types "^2.1.4"
+    ethereumjs-abi "0.6.5"
+    ethereumjs-util "^5.1.1"
+    ethers "~4.0.4"
+    lodash "^4.17.11"
+
 "@0x/order-watcher@^4.0.13":
   version "4.0.13"
   resolved "https://registry.npmjs.org/@0x/order-watcher/-/order-watcher-4.0.13.tgz#da73c71b17431f24057caa384e75e5870c951168"
-  integrity sha512-mdgAdDN1pP8Bd4xMYXv2S8xM0FjtxwLGzJgVF6aCfoozPGApQScDFz/8J7rbNDxHFOjwqcJMqVCClWacV4lzWQ==
   dependencies:
     "@0x/abi-gen-wrappers" "^5.0.1"
     "@0x/assert" "^2.1.0"
@@ -208,7 +325,6 @@
 "@0x/subproviders@^4.1.1":
   version "4.1.1"
   resolved "https://registry.npmjs.org/@0x/subproviders/-/subproviders-4.1.1.tgz#de861396aa3adc34a821b0ab28c0fd8bdf3961e2"
-  integrity sha512-VfZK1y67GlVI4+KPq23iKnrsDtRN+YfeK+ytgM7LamytmbhkcVRL0m55/B8uPurOp+Y23498/ZQIBahf5lGajA==
   dependencies:
     "@0x/assert" "^2.1.0"
     "@0x/types" "^2.4.0"
@@ -235,6 +351,35 @@
   optionalDependencies:
     "@ledgerhq/hw-transport-node-hid" "^4.3.0"
 
+"@0x/subproviders@^4.1.2":
+  version "4.1.2"
+  resolved "https://registry.yarnpkg.com/@0x/subproviders/-/subproviders-4.1.2.tgz#ab7bb0f482b11ccb4615fb5dd8ca85199cd0ae23"
+  dependencies:
+    "@0x/assert" "^2.1.1"
+    "@0x/types" "^2.4.1"
+    "@0x/typescript-typings" "^4.2.4"
+    "@0x/utils" "^4.4.1"
+    "@0x/web3-wrapper" "^6.0.8"
+    "@ledgerhq/hw-app-eth" "^4.3.0"
+    "@ledgerhq/hw-transport-u2f" "4.24.0"
+    "@types/eth-lightwallet" "^3.0.0"
+    "@types/hdkey" "^0.7.0"
+    "@types/web3-provider-engine" "^14.0.0"
+    bip39 "^2.5.0"
+    bn.js "^4.11.8"
+    eth-lightwallet "^3.0.1"
+    ethereum-types "^2.1.4"
+    ethereumjs-tx "^1.3.5"
+    ethereumjs-util "^5.1.1"
+    ganache-core "^2.5.3"
+    hdkey "^0.7.1"
+    json-rpc-error "2.0.0"
+    lodash "^4.17.11"
+    semaphore-async-await "^1.5.1"
+    web3-provider-engine "14.0.6"
+  optionalDependencies:
+    "@ledgerhq/hw-transport-node-hid" "^4.3.0"
+
 "@0x/tslint-config@^3.0.1":
   version "3.0.1"
   resolved "https://registry.yarnpkg.com/@0x/tslint-config/-/tslint-config-3.0.1.tgz#396038f617371ff6bc2dc36c2b5162b13835576f"
@@ -256,12 +401,19 @@
 "@0x/types@^2.4.0":
   version "2.4.0"
   resolved "https://registry.npmjs.org/@0x/types/-/types-2.4.0.tgz#4924ab3b1e8cb7b99bf01713265ce54bbcc16790"
-  integrity sha512-F+yA9EAeUHH9JltaWH5ffi0CTQ0uVEMvgYduKLpWDcWxsQm6yJhi0waOZu2i0ISUvaWbKpmt5blXXO6KxeDN2w==
   dependencies:
     "@types/node" "*"
     bignumber.js "~8.0.2"
     ethereum-types "^2.1.3"
 
+"@0x/types@^2.4.1":
+  version "2.4.1"
+  resolved "https://registry.yarnpkg.com/@0x/types/-/types-2.4.1.tgz#41a42185dcd093b19ef0d4595a432b285aae4746"
+  dependencies:
+    "@types/node" "*"
+    bignumber.js "~8.0.2"
+    ethereum-types "^2.1.4"
+
 "@0x/typescript-typings@^4.2.2":
   version "4.2.2"
   resolved "https://registry.yarnpkg.com/@0x/typescript-typings/-/typescript-typings-4.2.2.tgz#6c3e51e479c1ecf9e9b3eeae95a51a91be11570a"
@@ -275,7 +427,6 @@
 "@0x/typescript-typings@^4.2.3":
   version "4.2.3"
   resolved "https://registry.npmjs.org/@0x/typescript-typings/-/typescript-typings-4.2.3.tgz#eabf54053307ac505ef0013c189b9747425825d0"
-  integrity sha512-tXby3eQjvZBVYNl4St1p3gNSjs1vMx7aqXeoixIJtaSijiQc5aogDYdOy0bus/xaz1yOyzvmRnYHfWKIOYkTRA==
   dependencies:
     "@types/bn.js" "^4.11.0"
     "@types/react" "*"
@@ -283,6 +434,16 @@
     ethereum-types "^2.1.3"
     popper.js "1.14.3"
 
+"@0x/typescript-typings@^4.2.4":
+  version "4.2.4"
+  resolved "https://registry.yarnpkg.com/@0x/typescript-typings/-/typescript-typings-4.2.4.tgz#0858639ddfdf7e9e1a3f9fd8f7d8f2e8ebfdce85"
+  dependencies:
+    "@types/bn.js" "^4.11.0"
+    "@types/react" "*"
+    bignumber.js "~8.0.2"
+    ethereum-types "^2.1.4"
+    popper.js "1.14.3"
+
 "@0x/utils@^4.3.3":
   version "4.3.3"
   resolved "https://registry.yarnpkg.com/@0x/utils/-/utils-4.3.3.tgz#56ab7b42a2a938057bf191e83054aa75a25a18f5"
@@ -304,7 +465,6 @@
 "@0x/utils@^4.4.0":
   version "4.4.0"
   resolved "https://registry.npmjs.org/@0x/utils/-/utils-4.4.0.tgz#2bbd1eed6abbcfcbe79ca3da411b794e055007be"
-  integrity sha512-WnAxmOFPwJHVycja/r0FzXwKazI9y8olVwRuEHN51xvDKA/WYVQ6VpegN9eIF3xo7ytLkeDY0ihU9dEAN9tJvg==
   dependencies:
     "@0x/types" "^2.4.0"
     "@0x/typescript-typings" "^4.2.3"
@@ -320,6 +480,24 @@
     js-sha3 "^0.7.0"
     lodash "^4.17.11"
 
+"@0x/utils@^4.4.1":
+  version "4.4.1"
+  resolved "https://registry.yarnpkg.com/@0x/utils/-/utils-4.4.1.tgz#bcdf992ee59ca7b3e7042795b142fa3a22e1bd56"
+  dependencies:
+    "@0x/types" "^2.4.1"
+    "@0x/typescript-typings" "^4.2.4"
+    "@types/node" "*"
+    abortcontroller-polyfill "^1.1.9"
+    bignumber.js "~8.0.2"
+    chalk "^2.3.0"
+    detect-node "2.0.3"
+    ethereum-types "^2.1.4"
+    ethereumjs-util "^5.1.1"
+    ethers "~4.0.4"
+    isomorphic-fetch "2.2.1"
+    js-sha3 "^0.7.0"
+    lodash "^4.17.11"
+
 "@0x/web3-wrapper@^6.0.6":
   version "6.0.6"
   resolved "https://registry.yarnpkg.com/@0x/web3-wrapper/-/web3-wrapper-6.0.6.tgz#bf2b07ba9f309e4c7a25dd1b25b2e9de67d0afc9"
@@ -336,7 +514,6 @@
 "@0x/web3-wrapper@^6.0.7":
   version "6.0.7"
   resolved "https://registry.npmjs.org/@0x/web3-wrapper/-/web3-wrapper-6.0.7.tgz#dc8c11e7e68f58be059656349c0f3cc203ed7188"
-  integrity sha512-yMt6yfXUDr3XRyxWeiDv84KiMDQ1hCyQ2MdlSxwiITAeu37HpD+44iCHdQge/p/PVASd2lsc0TexeFsOIQ+0Og==
   dependencies:
     "@0x/assert" "^2.1.0"
     "@0x/json-schemas" "^3.0.11"
@@ -347,6 +524,19 @@
     ethers "~4.0.4"
     lodash "^4.17.11"
 
+"@0x/web3-wrapper@^6.0.8":
+  version "6.0.8"
+  resolved "https://registry.yarnpkg.com/@0x/web3-wrapper/-/web3-wrapper-6.0.8.tgz#04515c902aeb8253af93d0babfcf19337129f4db"
+  dependencies:
+    "@0x/assert" "^2.1.1"
+    "@0x/json-schemas" "^3.1.11"
+    "@0x/typescript-typings" "^4.2.4"
+    "@0x/utils" "^4.4.1"
+    ethereum-types "^2.1.4"
+    ethereumjs-util "^5.1.1"
+    ethers "~4.0.4"
+    lodash "^4.17.11"
+
 "@babel/code-frame@7.0.0", "@babel/code-frame@^7.0.0", "@babel/code-frame@^7.0.0-beta.35":
   version "7.0.0"
   resolved "https://registry.yarnpkg.com/@babel/code-frame/-/code-frame-7.0.0.tgz#06e2ab19bdb535385559aabb5ba59729482800f8"
@@ -5333,7 +5523,13 @@ ethereum-types@^2.1.2:
 ethereum-types@^2.1.3:
   version "2.1.3"
   resolved "https://registry.npmjs.org/ethereum-types/-/ethereum-types-2.1.3.tgz#766a483f1beedd195e9e1665ba38979fc3b81a47"
-  integrity sha512-m+PLWGl9eyOEApIoubLQ0e/OFUEm1KUUmnJjAlV3Jcs9LgJD+jEfJOtTIdnRsKgNzRojwfErriqKjlvqjjkODw==
+  dependencies:
+    "@types/node" "*"
+    bignumber.js "~8.0.2"
+
+ethereum-types@^2.1.4:
+  version "2.1.4"
+  resolved "https://registry.yarnpkg.com/ethereum-types/-/ethereum-types-2.1.4.tgz#5e3f5fd562f354d6334500af7a10bea10da0c7c4"
   dependencies:
     "@types/node" "*"
     bignumber.js "~8.0.2"