Use different lodash import syntax which allows to include only used functions

3 files changed, 23 insertions, 16 deletions

diff --git a/src/utils/assert.ts b/src/utils/assert.ts
index 94b119d5a..c4f1915e7 100644
--- a/src/utils/assert.ts
+++ b/src/utils/assert.ts
@@ -1,4 +1,10 @@
-import * as _ from 'lodash';
+import uniq from 'lodash/uniq';
+import isEmpty from 'lodash/isEmpty';
+import isObject from 'lodash/isObject';
+import isFinite from 'lodash/isFinite';
+import isString from 'lodash/isString';
+import isBoolean from 'lodash/isBoolean';
+import isUndefined from 'lodash/isUndefined';
 import * as BigNumber from 'bignumber.js';
 import * as Web3 from 'web3';
 import {Web3Wrapper} from '../web3_wrapper';
@@ -9,17 +15,17 @@ const HEX_REGEX = /^0x[0-9A-F]*$/i;
 
 export const assert = {
     isBigNumber(variableName: string, value: BigNumber.BigNumber): void {
-        const isBigNumber = _.isObject(value) && value.isBigNumber;
+        const isBigNumber = isObject(value) && value.isBigNumber;
         this.assert(isBigNumber, this.typeAssertionMessage(variableName, 'BigNumber', value));
     },
     isUndefined(value: any, variableName?: string): void {
-        this.assert(_.isUndefined(value), this.typeAssertionMessage(variableName, 'undefined', value));
+        this.assert(isUndefined(value), this.typeAssertionMessage(variableName, 'undefined', value));
     },
     isString(variableName: string, value: string): void {
-        this.assert(_.isString(value), this.typeAssertionMessage(variableName, 'string', value));
+        this.assert(isString(value), this.typeAssertionMessage(variableName, 'string', value));
     },
     isHexString(variableName: string, value: string): void {
-        this.assert(_.isString(value) && HEX_REGEX.test(value),
+        this.assert(isString(value) && HEX_REGEX.test(value),
             this.typeAssertionMessage(variableName, 'HexString', value));
     },
     isETHAddressHex(variableName: string, value: string): void {
@@ -36,19 +42,19 @@ export const assert = {
     },
     async isUserAddressAvailableAsync(web3Wrapper: Web3Wrapper): Promise<void> {
         const availableAddresses = await web3Wrapper.getAvailableAddressesAsync();
-        this.assert(!_.isEmpty(availableAddresses), 'No addresses were available on the provided web3 instance');
+        this.assert(!isEmpty(availableAddresses), 'No addresses were available on the provided web3 instance');
     },
     hasAtMostOneUniqueValue(value: any[], errMsg: string): void {
-        this.assert(_.uniq(value).length <= 1, errMsg);
+        this.assert(uniq(value).length <= 1, errMsg);
     },
     isNumber(variableName: string, value: number): void {
-        this.assert(_.isFinite(value), this.typeAssertionMessage(variableName, 'number', value));
+        this.assert(isFinite(value), this.typeAssertionMessage(variableName, 'number', value));
     },
     isValidOrderHash(variableName: string, value: string): void {
         this.assert(utils.isValidOrderHash(value), this.typeAssertionMessage(variableName, 'orderHash', value));
     },
     isBoolean(variableName: string, value: boolean): void {
-        this.assert(_.isBoolean(value), this.typeAssertionMessage(variableName, 'boolean', value));
+        this.assert(isBoolean(value), this.typeAssertionMessage(variableName, 'boolean', value));
     },
     doesConformToSchema(variableName: string, value: object, schema: Schema): void {
         const schemaValidator = new SchemaValidator();
diff --git a/src/utils/decorators.ts b/src/utils/decorators.ts
index a25f2cff5..f8786dbbe 100644
--- a/src/utils/decorators.ts
+++ b/src/utils/decorators.ts
@@ -1,4 +1,4 @@
-import * as _ from 'lodash';
+import includes from 'lodash/includes';
 import {constants} from './constants';
 import {AsyncMethod, ZeroExError} from '../types';
 
@@ -20,10 +20,10 @@ export const decorators = {
                 const result = await originalMethod.apply(this, args);
                 return result;
             } catch (error) {
-                if (_.includes(error.message, constants.INVALID_JUMP_PATTERN)) {
+                if (includes(error.message, constants.INVALID_JUMP_PATTERN)) {
                     throw new Error(ZeroExError.INVALID_JUMP);
                 }
-                if (_.includes(error.message, constants.OUT_OF_GAS_PATTERN)) {
+                if (includes(error.message, constants.OUT_OF_GAS_PATTERN)) {
                     throw new Error(ZeroExError.OUT_OF_GAS);
                 }
                 throw error;
diff --git a/src/utils/utils.ts b/src/utils/utils.ts
index bad5b6498..e4e7b77ab 100644
--- a/src/utils/utils.ts
+++ b/src/utils/utils.ts
@@ -1,4 +1,5 @@
-import * as _ from 'lodash';
+import map from 'lodash/map';
+import includes from 'lodash/includes';
 import * as BN from 'bn.js';
 import * as ethABI from 'ethereumjs-abi';
 import * as ethUtil from 'ethereumjs-util';
@@ -20,7 +21,7 @@ export const utils = {
         console.log(message);
     },
     isParityNode(nodeVersion: string): boolean {
-        return _.includes(nodeVersion, 'Parity');
+        return includes(nodeVersion, 'Parity');
     },
     isValidOrderHash(orderHashHex: string): boolean {
         const isValid = /^0x[0-9A-F]{64}$/i.test(orderHashHex);
@@ -44,8 +45,8 @@ export const utils = {
             {value: utils.bigNumberToBN(order.expirationUnixTimestampSec), type: SolidityTypes.uint256},
             {value: utils.bigNumberToBN(order.salt), type: SolidityTypes.uint256},
         ];
-        const types = _.map(orderParts, o => o.type);
-        const values = _.map(orderParts, o => o.value);
+        const types = map(orderParts, o => o.type);
+        const values = map(orderParts, o => o.value);
         const hashBuff = ethABI.soliditySHA3(types, values);
         const hashHex = ethUtil.bufferToHex(hashBuff);
         return hashHex;