Prefix private vars with _

5 files changed, 130 insertions, 129 deletions

diff --git a/src/0x.js.ts b/src/0x.js.ts
index b1e4e25ff..3a149ae6e 100644
--- a/src/0x.js.ts
+++ b/src/0x.js.ts
@@ -33,7 +33,7 @@ export class ZeroEx {
     public exchange: ExchangeWrapper;
     public tokenRegistry: TokenRegistryWrapper;
     public token: TokenWrapper;
-    private web3Wrapper: Web3Wrapper;
+    private _web3Wrapper: Web3Wrapper;
     /**
      * Verifies that the elliptic curve signature `signature` was generated
      * by signing `dataHex` with the private key corresponding to the `signerAddressHex` address.
@@ -128,10 +128,10 @@ export class ZeroEx {
      * @return  An instance of the 0x.js ZeroEx class.
      */
     constructor(web3: Web3) {
-        this.web3Wrapper = new Web3Wrapper(web3);
-        this.token = new TokenWrapper(this.web3Wrapper);
-        this.exchange = new ExchangeWrapper(this.web3Wrapper, this.token);
-        this.tokenRegistry = new TokenRegistryWrapper(this.web3Wrapper);
+        this._web3Wrapper = new Web3Wrapper(web3);
+        this.token = new TokenWrapper(this._web3Wrapper);
+        this.exchange = new ExchangeWrapper(this._web3Wrapper, this.token);
+        this.tokenRegistry = new TokenRegistryWrapper(this._web3Wrapper);
     }
     /**
      * Sets a new provider for the web3 instance used by 0x.js. Updating the provider will stop all
@@ -139,7 +139,7 @@ export class ZeroEx {
      * @param   provider    The Web3.Provider you would like the 0x.js library to use from now on.
      */
     public async setProviderAsync(provider: Web3.Provider) {
-        this.web3Wrapper.setProvider(provider);
+        this._web3Wrapper.setProvider(provider);
         await this.exchange.invalidateContractInstanceAsync();
         this.tokenRegistry.invalidateContractInstance();
         this.token.invalidateContractInstances();
@@ -149,7 +149,7 @@ export class ZeroEx {
      * @return  An array of Ethereum addresses available.
      */
     public async getAvailableAddressesAsync(): Promise<string[]> {
-        const availableAddresses = await this.web3Wrapper.getAvailableAddressesAsync();
+        const availableAddresses = await this._web3Wrapper.getAvailableAddressesAsync();
         return availableAddresses;
     }
     /**
@@ -160,7 +160,7 @@ export class ZeroEx {
     public async getOrderHashHexAsync(order: Order|SignedOrder): Promise<string> {
         assert.doesConformToSchema('order', order, orderSchema);
 
-        const exchangeContractAddr = await this.getExchangeAddressAsync();
+        const exchangeContractAddr = await this._getExchangeAddressAsync();
         const orderHashHex = utils.getOrderHashHex(order, exchangeContractAddr);
         return orderHashHex;
     }
@@ -174,10 +174,10 @@ export class ZeroEx {
      */
     public async signOrderHashAsync(orderHashHex: string, signerAddress: string): Promise<ECSignature> {
         assert.isHexString('orderHashHex', orderHashHex);
-        await assert.isSenderAddressAsync('signerAddress', signerAddress, this.web3Wrapper);
+        await assert.isSenderAddressAsync('signerAddress', signerAddress, this._web3Wrapper);
 
         let msgHashHex;
-        const nodeVersion = await this.web3Wrapper.getNodeVersionAsync();
+        const nodeVersion = await this._web3Wrapper.getNodeVersionAsync();
         const isParityNode = utils.isParityNode(nodeVersion);
         if (isParityNode) {
             // Parity node adds the personalMessage prefix itself
@@ -188,7 +188,7 @@ export class ZeroEx {
             msgHashHex = ethUtil.bufferToHex(msgHashBuff);
         }
 
-        const signature = await this.web3Wrapper.signTransactionAsync(signerAddress, msgHashHex);
+        const signature = await this._web3Wrapper.signTransactionAsync(signerAddress, msgHashHex);
 
         let signatureData;
         const [nodeVersionNumber] = findVersions(nodeVersion);
@@ -224,8 +224,8 @@ export class ZeroEx {
         }
         return ecSignature;
     }
-    private async getExchangeAddressAsync() {
-        const networkIdIfExists = await this.web3Wrapper.getNetworkIdIfExistsAsync();
+    private async _getExchangeAddressAsync() {
+        const networkIdIfExists = await this._web3Wrapper.getNetworkIdIfExistsAsync();
         const exchangeNetworkConfigsIfExists = _.isUndefined(networkIdIfExists) ?
                                        undefined :
                                        (ExchangeArtifacts as any).networks[networkIdIfExists];
diff --git a/src/contract_wrappers/contract_wrapper.ts b/src/contract_wrappers/contract_wrapper.ts
index c3067f613..99cfd97f0 100644
--- a/src/contract_wrappers/contract_wrapper.ts
+++ b/src/contract_wrappers/contract_wrapper.ts
@@ -9,7 +9,7 @@ export class ContractWrapper {
     constructor(web3Wrapper: Web3Wrapper) {
         this.web3Wrapper = web3Wrapper;
     }
-    protected async instantiateContractIfExistsAsync(artifact: Artifact, address?: string): Promise<ContractInstance> {
+    protected async _instantiateContractIfExistsAsync(artifact: Artifact, address?: string): Promise<ContractInstance> {
         const c = await contract(artifact);
         const providerObj = this.web3Wrapper.getCurrentProvider();
         c.setProvider(providerObj);
diff --git a/src/contract_wrappers/exchange_wrapper.ts b/src/contract_wrappers/exchange_wrapper.ts
index 76f86e464..d546a6102 100644
--- a/src/contract_wrappers/exchange_wrapper.ts
+++ b/src/contract_wrappers/exchange_wrapper.ts
@@ -37,7 +37,7 @@ import {constants} from '../utils/constants';
 import {TokenWrapper} from './token_wrapper';
 
 export class ExchangeWrapper extends ContractWrapper {
-    private exchangeContractErrCodesToMsg = {
+    private _exchangeContractErrCodesToMsg = {
         [ExchangeContractErrCodes.ERROR_FILL_EXPIRED]: ExchangeContractErrs.ORDER_FILL_EXPIRED,
         [ExchangeContractErrCodes.ERROR_CANCEL_EXPIRED]: ExchangeContractErrs.ORDER_FILL_EXPIRED,
         [ExchangeContractErrCodes.ERROR_FILL_NO_VALUE]: ExchangeContractErrs.ORDER_REMAINING_FILL_AMOUNT_ZERO,
@@ -45,10 +45,10 @@ export class ExchangeWrapper extends ContractWrapper {
         [ExchangeContractErrCodes.ERROR_FILL_TRUNCATION]: ExchangeContractErrs.ORDER_FILL_ROUNDING_ERROR,
         [ExchangeContractErrCodes.ERROR_FILL_BALANCE_ALLOWANCE]: ExchangeContractErrs.FILL_BALANCE_ALLOWANCE_ERROR,
     };
-    private exchangeContractIfExists?: ExchangeContract;
-    private exchangeLogEventObjs: ContractEventObj[];
-    private tokenWrapper: TokenWrapper;
-    private static getOrderAddressesAndValues(order: Order): [OrderAddresses, OrderValues] {
+    private _exchangeContractIfExists?: ExchangeContract;
+    private _exchangeLogEventObjs: ContractEventObj[];
+    private _tokenWrapper: TokenWrapper;
+    private static _getOrderAddressesAndValues(order: Order): [OrderAddresses, OrderValues] {
         const orderAddresses: OrderAddresses = [
             order.maker,
             order.taker,
@@ -68,12 +68,12 @@ export class ExchangeWrapper extends ContractWrapper {
     }
     constructor(web3Wrapper: Web3Wrapper, tokenWrapper: TokenWrapper) {
         super(web3Wrapper);
-        this.tokenWrapper = tokenWrapper;
-        this.exchangeLogEventObjs = [];
+        this._tokenWrapper = tokenWrapper;
+        this._exchangeLogEventObjs = [];
     }
     public async invalidateContractInstanceAsync(): Promise<void> {
-        await this.stopWatchingExchangeLogEventsAsync();
-        delete this.exchangeContractIfExists;
+        await this._stopWatchingExchangeLogEventsAsync();
+        delete this._exchangeContractIfExists;
     }
     /**
      * Returns the unavailable takerAmount of an order. Unavailable amount is defined as the total
@@ -86,7 +86,7 @@ export class ExchangeWrapper extends ContractWrapper {
     public async getUnavailableTakerAmountAsync(orderHashHex: string): Promise<BigNumber.BigNumber> {
         assert.isValidOrderHash('orderHashHex', orderHashHex);
 
-        const exchangeContract = await this.getExchangeContractAsync();
+        const exchangeContract = await this._getExchangeContractAsync();
         let unavailableAmountInBaseUnits = await exchangeContract.getUnavailableValueT.call(orderHashHex);
         // Wrap BigNumbers returned from web3 with our own (later) version of BigNumber
         unavailableAmountInBaseUnits = new BigNumber(unavailableAmountInBaseUnits);
@@ -100,7 +100,7 @@ export class ExchangeWrapper extends ContractWrapper {
     public async getFilledTakerAmountAsync(orderHashHex: string): Promise<BigNumber.BigNumber> {
         assert.isValidOrderHash('orderHashHex', orderHashHex);
 
-        const exchangeContract = await this.getExchangeContractAsync();
+        const exchangeContract = await this._getExchangeContractAsync();
         let fillAmountInBaseUnits = await exchangeContract.filled.call(orderHashHex);
         // Wrap BigNumbers returned from web3 with our own (later) version of BigNumber
         fillAmountInBaseUnits = new BigNumber(fillAmountInBaseUnits);
@@ -115,7 +115,7 @@ export class ExchangeWrapper extends ContractWrapper {
     public async getCanceledTakerAmountAsync(orderHashHex: string): Promise<BigNumber.BigNumber> {
         assert.isValidOrderHash('orderHashHex', orderHashHex);
 
-        const exchangeContract = await this.getExchangeContractAsync();
+        const exchangeContract = await this._getExchangeContractAsync();
         let cancelledAmountInBaseUnits = await exchangeContract.cancelled.call(orderHashHex);
         // Wrap BigNumbers returned from web3 with our own (later) version of BigNumber
         cancelledAmountInBaseUnits = new BigNumber(cancelledAmountInBaseUnits);
@@ -142,10 +142,10 @@ export class ExchangeWrapper extends ContractWrapper {
         assert.isBoolean('shouldCheckTransfer', shouldCheckTransfer);
         await assert.isSenderAddressAsync('takerAddress', takerAddress, this.web3Wrapper);
 
-        const exchangeInstance = await this.getExchangeContractAsync();
-        await this.validateFillOrderAndThrowIfInvalidAsync(signedOrder, takerTokenFillAmount, takerAddress);
+        const exchangeInstance = await this._getExchangeContractAsync();
+        await this._validateFillOrderAndThrowIfInvalidAsync(signedOrder, takerTokenFillAmount, takerAddress);
 
-        const [orderAddresses, orderValues] = ExchangeWrapper.getOrderAddressesAndValues(signedOrder);
+        const [orderAddresses, orderValues] = ExchangeWrapper._getOrderAddressesAndValues(signedOrder);
 
         const gas = await exchangeInstance.fill.estimateGas(
             orderAddresses,
@@ -172,7 +172,7 @@ export class ExchangeWrapper extends ContractWrapper {
                 gas,
             },
         );
-        this.throwErrorLogsAsErrors(response.logs);
+        this._throwErrorLogsAsErrors(response.logs);
     }
     /**
      * Sequentially and atomically fills signedOrders up to the specified takerTokenFillAmount.
@@ -198,7 +198,7 @@ export class ExchangeWrapper extends ContractWrapper {
         assert.doesConformToSchema('signedOrders', signedOrders, signedOrdersSchema);
         await assert.isSenderAddressAsync('takerAddress', takerAddress, this.web3Wrapper);
         for (const signedOrder of signedOrders) {
-            await this.validateFillOrderAndThrowIfInvalidAsync(
+            await this._validateFillOrderAndThrowIfInvalidAsync(
                 signedOrder, takerTokenFillAmount, takerAddress);
         }
         if (_.isEmpty(signedOrders)) {
@@ -207,7 +207,7 @@ export class ExchangeWrapper extends ContractWrapper {
 
         const orderAddressesValuesAndSignatureArray = _.map(signedOrders, signedOrder => {
             return [
-                ...ExchangeWrapper.getOrderAddressesAndValues(signedOrder),
+                ...ExchangeWrapper._getOrderAddressesAndValues(signedOrder),
                 signedOrder.ecSignature.v,
                 signedOrder.ecSignature.r,
                 signedOrder.ecSignature.s,
@@ -218,7 +218,7 @@ export class ExchangeWrapper extends ContractWrapper {
             orderAddressesValuesAndSignatureArray,
         );
 
-        const exchangeInstance = await this.getExchangeContractAsync();
+        const exchangeInstance = await this._getExchangeContractAsync();
         const gas = await exchangeInstance.fillUpTo.estimateGas(
             orderAddressesArray,
             orderValuesArray,
@@ -244,7 +244,7 @@ export class ExchangeWrapper extends ContractWrapper {
                 gas,
             },
         );
-        this.throwErrorLogsAsErrors(response.logs);
+        this._throwErrorLogsAsErrors(response.logs);
     }
     /**
      * Batch version of fillOrderAsync.
@@ -265,7 +265,7 @@ export class ExchangeWrapper extends ContractWrapper {
         await assert.isSenderAddressAsync('takerAddress', takerAddress, this.web3Wrapper);
         assert.doesConformToSchema('orderFillRequests', orderFillRequests, orderFillRequestsSchema);
         for (const orderFillRequest of orderFillRequests) {
-            await this.validateFillOrderAndThrowIfInvalidAsync(
+            await this._validateFillOrderAndThrowIfInvalidAsync(
                 orderFillRequest.signedOrder, orderFillRequest.takerTokenFillAmount, takerAddress);
         }
         if (_.isEmpty(orderFillRequests)) {
@@ -274,7 +274,7 @@ export class ExchangeWrapper extends ContractWrapper {
 
         const orderAddressesValuesAmountsAndSignatureArray = _.map(orderFillRequests, orderFillRequest => {
             return [
-                ...ExchangeWrapper.getOrderAddressesAndValues(orderFillRequest.signedOrder),
+                ...ExchangeWrapper._getOrderAddressesAndValues(orderFillRequest.signedOrder),
                 orderFillRequest.takerTokenFillAmount,
                 orderFillRequest.signedOrder.ecSignature.v,
                 orderFillRequest.signedOrder.ecSignature.r,
@@ -286,7 +286,7 @@ export class ExchangeWrapper extends ContractWrapper {
             orderAddressesValuesAmountsAndSignatureArray,
         );
 
-        const exchangeInstance = await this.getExchangeContractAsync();
+        const exchangeInstance = await this._getExchangeContractAsync();
         const gas = await exchangeInstance.batchFill.estimateGas(
             orderAddressesArray,
             orderValuesArray,
@@ -312,7 +312,7 @@ export class ExchangeWrapper extends ContractWrapper {
                 gas,
             },
         );
-        this.throwErrorLogsAsErrors(response.logs);
+        this._throwErrorLogsAsErrors(response.logs);
     }
     /**
      * Attempts to fill a specific amount of an order. If the entire amount specified cannot be filled,
@@ -329,13 +329,13 @@ export class ExchangeWrapper extends ContractWrapper {
         assert.isBigNumber('takerTokenFillAmount', takerTokenFillAmount);
         await assert.isSenderAddressAsync('takerAddress', takerAddress, this.web3Wrapper);
 
-        const exchangeInstance = await this.getExchangeContractAsync();
-        await this.validateFillOrderAndThrowIfInvalidAsync(signedOrder, takerTokenFillAmount, takerAddress);
+        const exchangeInstance = await this._getExchangeContractAsync();
+        await this._validateFillOrderAndThrowIfInvalidAsync(signedOrder, takerTokenFillAmount, takerAddress);
 
-        await this.validateFillOrKillOrderAndThrowIfInvalidAsync(signedOrder, exchangeInstance.address,
+        await this._validateFillOrKillOrderAndThrowIfInvalidAsync(signedOrder, exchangeInstance.address,
                                                                  takerTokenFillAmount);
 
-        const [orderAddresses, orderValues] = ExchangeWrapper.getOrderAddressesAndValues(signedOrder);
+        const [orderAddresses, orderValues] = ExchangeWrapper._getOrderAddressesAndValues(signedOrder);
 
         const gas = await exchangeInstance.fillOrKill.estimateGas(
             orderAddresses,
@@ -360,7 +360,7 @@ export class ExchangeWrapper extends ContractWrapper {
                 gas,
             },
         );
-        this.throwErrorLogsAsErrors(response.logs);
+        this._throwErrorLogsAsErrors(response.logs);
     }
     /**
      * Batch version of fillOrKill. Allows a taker to specify a batch of orders that will either be atomically
@@ -373,15 +373,15 @@ export class ExchangeWrapper extends ContractWrapper {
                                       takerAddress: string): Promise<void> {
         await assert.isSenderAddressAsync('takerAddress', takerAddress, this.web3Wrapper);
         assert.doesConformToSchema('orderFillOrKillRequests', orderFillOrKillRequests, orderFillOrKillRequestsSchema);
-        const exchangeInstance = await this.getExchangeContractAsync();
+        const exchangeInstance = await this._getExchangeContractAsync();
         for (const request of orderFillOrKillRequests) {
-            await this.validateFillOrKillOrderAndThrowIfInvalidAsync(request.signedOrder, exchangeInstance.address,
+            await this._validateFillOrKillOrderAndThrowIfInvalidAsync(request.signedOrder, exchangeInstance.address,
                                                                      request.fillTakerAmount);
         }
 
         const orderAddressesValuesAndTakerTokenFillAmounts = _.map(orderFillOrKillRequests, request => {
             return [
-                ...ExchangeWrapper.getOrderAddressesAndValues(request.signedOrder),
+                ...ExchangeWrapper._getOrderAddressesAndValues(request.signedOrder),
                 request.fillTakerAmount,
                 request.signedOrder.ecSignature.v,
                 request.signedOrder.ecSignature.r,
@@ -416,7 +416,7 @@ export class ExchangeWrapper extends ContractWrapper {
                 gas,
             },
         );
-        this.throwErrorLogsAsErrors(response.logs);
+        this._throwErrorLogsAsErrors(response.logs);
     }
     /**
      * Cancel a given fill amount of an order. Cancellations are cumulative.
@@ -430,10 +430,10 @@ export class ExchangeWrapper extends ContractWrapper {
         assert.isBigNumber('takerTokenCancelAmount', takerTokenCancelAmount);
         await assert.isSenderAddressAsync('order.maker', order.maker, this.web3Wrapper);
 
-        const exchangeInstance = await this.getExchangeContractAsync();
-        await this.validateCancelOrderAndThrowIfInvalidAsync(order, takerTokenCancelAmount);
+        const exchangeInstance = await this._getExchangeContractAsync();
+        await this._validateCancelOrderAndThrowIfInvalidAsync(order, takerTokenCancelAmount);
 
-        const [orderAddresses, orderValues] = ExchangeWrapper.getOrderAddressesAndValues(order);
+        const [orderAddresses, orderValues] = ExchangeWrapper._getOrderAddressesAndValues(order);
         const gas = await exchangeInstance.cancel.estimateGas(
             orderAddresses,
             orderValues,
@@ -451,7 +451,7 @@ export class ExchangeWrapper extends ContractWrapper {
                 gas,
             },
         );
-        this.throwErrorLogsAsErrors(response.logs);
+        this._throwErrorLogsAsErrors(response.logs);
     }
     /**
      * Batch version of cancelOrderAsync. Atomically cancels multiple orders in a single transaction.
@@ -467,17 +467,17 @@ export class ExchangeWrapper extends ContractWrapper {
         assert.doesConformToSchema('orderCancellationRequests', orderCancellationRequests,
                                    orderCancellationRequestsSchema);
         for (const cancellationRequest of orderCancellationRequests) {
-            await this.validateCancelOrderAndThrowIfInvalidAsync(
+            await this._validateCancelOrderAndThrowIfInvalidAsync(
                 cancellationRequest.order, cancellationRequest.takerTokenCancelAmount,
             );
         }
         if (_.isEmpty(orderCancellationRequests)) {
             return; // no-op
         }
-        const exchangeInstance = await this.getExchangeContractAsync();
+        const exchangeInstance = await this._getExchangeContractAsync();
         const orderAddressesValuesAndTakerTokenCancelAmounts = _.map(orderCancellationRequests, cancellationRequest => {
             return [
-                ...ExchangeWrapper.getOrderAddressesAndValues(cancellationRequest.order),
+                ...ExchangeWrapper._getOrderAddressesAndValues(cancellationRequest.order),
                 cancellationRequest.takerTokenCancelAmount,
             ];
         });
@@ -501,7 +501,7 @@ export class ExchangeWrapper extends ContractWrapper {
                 gas,
             },
         );
-        this.throwErrorLogsAsErrors(response.logs);
+        this._throwErrorLogsAsErrors(response.logs);
     }
     /**
      * Subscribe to an event type emitted by the Exchange smart contract
@@ -514,7 +514,7 @@ export class ExchangeWrapper extends ContractWrapper {
     public async subscribeAsync(eventName: ExchangeEvents, subscriptionOpts: SubscriptionOpts,
                                 indexFilterValues: IndexFilterValues, callback: EventCallback):
                                 Promise<void> {
-        const exchangeContract = await this.getExchangeContractAsync();
+        const exchangeContract = await this._getExchangeContractAsync();
         let createLogEvent: CreateContractEvent;
         switch (eventName) {
             case ExchangeEvents.LogFill:
@@ -533,15 +533,15 @@ export class ExchangeWrapper extends ContractWrapper {
 
         const logEventObj: ContractEventObj = createLogEvent(indexFilterValues, subscriptionOpts);
         logEventObj.watch(callback);
-        this.exchangeLogEventObjs.push(logEventObj);
+        this._exchangeLogEventObjs.push(logEventObj);
     }
-    private async isValidSignatureUsingContractCallAsync(dataHex: string, ecSignature: ECSignature,
-                                                         signerAddressHex: string): Promise<boolean> {
+    private async _isValidSignatureUsingContractCallAsync(dataHex: string, ecSignature: ECSignature,
+                                                          signerAddressHex: string): Promise<boolean> {
         assert.isHexString('dataHex', dataHex);
         assert.doesConformToSchema('ecSignature', ecSignature, ecSignatureSchema);
         assert.isETHAddressHex('signerAddressHex', signerAddressHex);
 
-        const exchangeInstance = await this.getExchangeContractAsync();
+        const exchangeInstance = await this._getExchangeContractAsync();
 
         const isValidSignature = await exchangeInstance.isValidSignature.call(
             signerAddressHex,
@@ -552,27 +552,27 @@ export class ExchangeWrapper extends ContractWrapper {
         );
         return isValidSignature;
     }
-    private async getOrderHashHexAsync(order: Order|SignedOrder): Promise<string> {
-        const exchangeInstance = await this.getExchangeContractAsync();
+    private async _getOrderHashHexAsync(order: Order|SignedOrder): Promise<string> {
+        const exchangeInstance = await this._getExchangeContractAsync();
         const orderHashHex = utils.getOrderHashHex(order, exchangeInstance.address);
         return orderHashHex;
     }
-    private async getOrderHashHexUsingContractCallAsync(order: Order|SignedOrder): Promise<string> {
-        const exchangeInstance = await this.getExchangeContractAsync();
-        const [orderAddresses, orderValues] = ExchangeWrapper.getOrderAddressesAndValues(order);
+    private async _getOrderHashHexUsingContractCallAsync(order: Order|SignedOrder): Promise<string> {
+        const exchangeInstance = await this._getExchangeContractAsync();
+        const [orderAddresses, orderValues] = ExchangeWrapper._getOrderAddressesAndValues(order);
         const orderHashHex = await exchangeInstance.getOrderHash.call(orderAddresses, orderValues);
         return orderHashHex;
     }
-    private async stopWatchingExchangeLogEventsAsync() {
-        const stopWatchingPromises = _.map(this.exchangeLogEventObjs, logEventObj => {
+    private async _stopWatchingExchangeLogEventsAsync() {
+        const stopWatchingPromises = _.map(this._exchangeLogEventObjs, logEventObj => {
             return promisify(logEventObj.stopWatching, logEventObj)();
         });
         await Promise.all(stopWatchingPromises);
-        this.exchangeLogEventObjs = [];
+        this._exchangeLogEventObjs = [];
     }
-    private async validateFillOrderAndThrowIfInvalidAsync(signedOrder: SignedOrder,
-                                                          fillTakerAmount: BigNumber.BigNumber,
-                                                          senderAddress: string): Promise<void> {
+    private async _validateFillOrderAndThrowIfInvalidAsync(signedOrder: SignedOrder,
+                                                           fillTakerAmount: BigNumber.BigNumber,
+                                                           senderAddress: string): Promise<void> {
         if (fillTakerAmount.eq(0)) {
             throw new Error(ExchangeContractErrs.ORDER_REMAINING_FILL_AMOUNT_ZERO);
         }
@@ -583,23 +583,23 @@ export class ExchangeWrapper extends ContractWrapper {
         if (signedOrder.expirationUnixTimestampSec.lessThan(currentUnixTimestampSec)) {
             throw new Error(ExchangeContractErrs.ORDER_FILL_EXPIRED);
         }
-        const zrxTokenAddress = await this.getZRXTokenAddressAsync();
-        await this.validateFillOrderBalancesAndAllowancesAndThrowIfInvalidAsync(signedOrder, fillTakerAmount,
+        const zrxTokenAddress = await this._getZRXTokenAddressAsync();
+        await this._validateFillOrderBalancesAndAllowancesAndThrowIfInvalidAsync(signedOrder, fillTakerAmount,
                                                                senderAddress, zrxTokenAddress);
 
-        const wouldRoundingErrorOccur = await this.isRoundingErrorAsync(
+        const wouldRoundingErrorOccur = await this._isRoundingErrorAsync(
             signedOrder.takerTokenAmount, fillTakerAmount, signedOrder.makerTokenAmount,
         );
         if (wouldRoundingErrorOccur) {
             throw new Error(ExchangeContractErrs.ORDER_FILL_ROUNDING_ERROR);
         }
     }
-    private async validateCancelOrderAndThrowIfInvalidAsync(
+    private async _validateCancelOrderAndThrowIfInvalidAsync(
         order: Order, takerTokenCancelAmount: BigNumber.BigNumber): Promise<void> {
         if (takerTokenCancelAmount.eq(0)) {
             throw new Error(ExchangeContractErrs.ORDER_CANCEL_AMOUNT_ZERO);
         }
-        const orderHash = await this.getOrderHashHexAsync(order);
+        const orderHash = await this._getOrderHashHexAsync(order);
         const unavailableAmount = await this.getUnavailableTakerAmountAsync(orderHash);
         if (order.takerTokenAmount.minus(unavailableAmount).eq(0)) {
             throw new Error(ExchangeContractErrs.ORDER_ALREADY_CANCELLED_OR_FILLED);
@@ -609,9 +609,9 @@ export class ExchangeWrapper extends ContractWrapper {
             throw new Error(ExchangeContractErrs.ORDER_CANCEL_EXPIRED);
         }
     }
-    private async validateFillOrKillOrderAndThrowIfInvalidAsync(signedOrder: SignedOrder,
-                                                                exchangeAddress: string,
-                                                                fillTakerAmount: BigNumber.BigNumber) {
+    private async _validateFillOrKillOrderAndThrowIfInvalidAsync(signedOrder: SignedOrder,
+                                                                 exchangeAddress: string,
+                                                                 fillTakerAmount: BigNumber.BigNumber) {
         // Check that fillValue available >= fillTakerAmount
         const orderHashHex = utils.getOrderHashHex(signedOrder, exchangeAddress);
         const unavailableTakerAmount = await this.getUnavailableTakerAmountAsync(orderHashHex);
@@ -629,17 +629,18 @@ export class ExchangeWrapper extends ContractWrapper {
      * TODO: Throw errors before calling the smart contract for these edge-cases in order to minimize
      * the callers gas costs.
      */
-    private async validateFillOrderBalancesAndAllowancesAndThrowIfInvalidAsync(signedOrder: SignedOrder,
-                                                                               fillTakerAmount: BigNumber.BigNumber,
-                                                                               senderAddress: string,
-                                                                               zrxTokenAddress: string): Promise<void> {
+    private async _validateFillOrderBalancesAndAllowancesAndThrowIfInvalidAsync(signedOrder: SignedOrder,
+                                                                                fillTakerAmount: BigNumber.BigNumber,
+                                                                                senderAddress: string,
+                                                                                zrxTokenAddress: string,
+    ): Promise<void> {
 
-        const makerBalance = await this.tokenWrapper.getBalanceAsync(signedOrder.makerTokenAddress,
+        const makerBalance = await this._tokenWrapper.getBalanceAsync(signedOrder.makerTokenAddress,
                                                                      signedOrder.maker);
-        const takerBalance = await this.tokenWrapper.getBalanceAsync(signedOrder.takerTokenAddress, senderAddress);
-        const makerAllowance = await this.tokenWrapper.getProxyAllowanceAsync(signedOrder.makerTokenAddress,
+        const takerBalance = await this._tokenWrapper.getBalanceAsync(signedOrder.takerTokenAddress, senderAddress);
+        const makerAllowance = await this._tokenWrapper.getProxyAllowanceAsync(signedOrder.makerTokenAddress,
                                                                               signedOrder.maker);
-        const takerAllowance = await this.tokenWrapper.getProxyAllowanceAsync(signedOrder.takerTokenAddress,
+        const takerAllowance = await this._tokenWrapper.getProxyAllowanceAsync(signedOrder.takerTokenAddress,
                                                                               senderAddress);
 
         // exchangeRate is the price of one maker token denominated in taker tokens
@@ -659,12 +660,12 @@ export class ExchangeWrapper extends ContractWrapper {
             throw new Error(ExchangeContractErrs.INSUFFICIENT_MAKER_ALLOWANCE);
         }
 
-        const makerFeeBalance = await this.tokenWrapper.getBalanceAsync(zrxTokenAddress,
+        const makerFeeBalance = await this._tokenWrapper.getBalanceAsync(zrxTokenAddress,
                                                                         signedOrder.maker);
-        const takerFeeBalance = await this.tokenWrapper.getBalanceAsync(zrxTokenAddress, senderAddress);
-        const makerFeeAllowance = await this.tokenWrapper.getProxyAllowanceAsync(zrxTokenAddress,
+        const takerFeeBalance = await this._tokenWrapper.getBalanceAsync(zrxTokenAddress, senderAddress);
+        const makerFeeAllowance = await this._tokenWrapper.getProxyAllowanceAsync(zrxTokenAddress,
                                                                                  signedOrder.maker);
-        const takerFeeAllowance = await this.tokenWrapper.getProxyAllowanceAsync(zrxTokenAddress,
+        const takerFeeAllowance = await this._tokenWrapper.getProxyAllowanceAsync(zrxTokenAddress,
                                                                                  senderAddress);
 
         if (signedOrder.takerFee.greaterThan(takerFeeBalance)) {
@@ -680,34 +681,34 @@ export class ExchangeWrapper extends ContractWrapper {
             throw new Error(ExchangeContractErrs.INSUFFICIENT_MAKER_FEE_ALLOWANCE);
         }
     }
-    private throwErrorLogsAsErrors(logs: ContractEvent[]): void {
+    private _throwErrorLogsAsErrors(logs: ContractEvent[]): void {
         const errEvent = _.find(logs, {event: 'LogError'});
         if (!_.isUndefined(errEvent)) {
             const errCode = errEvent.args.errorId.toNumber();
-            const errMessage = this.exchangeContractErrCodesToMsg[errCode];
+            const errMessage = this._exchangeContractErrCodesToMsg[errCode];
             throw new Error(errMessage);
         }
     }
-    private async isRoundingErrorAsync(takerTokenAmount: BigNumber.BigNumber,
-                                       fillTakerAmount: BigNumber.BigNumber,
-                                       makerTokenAmount: BigNumber.BigNumber): Promise<boolean> {
+    private async _isRoundingErrorAsync(takerTokenAmount: BigNumber.BigNumber,
+                                        fillTakerAmount: BigNumber.BigNumber,
+                                        makerTokenAmount: BigNumber.BigNumber): Promise<boolean> {
         await assert.isUserAddressAvailableAsync(this.web3Wrapper);
-        const exchangeInstance = await this.getExchangeContractAsync();
+        const exchangeInstance = await this._getExchangeContractAsync();
         const isRoundingError = await exchangeInstance.isRoundingError.call(
             takerTokenAmount, fillTakerAmount, makerTokenAmount,
         );
         return isRoundingError;
     }
-    private async getExchangeContractAsync(): Promise<ExchangeContract> {
-        if (!_.isUndefined(this.exchangeContractIfExists)) {
-            return this.exchangeContractIfExists;
+    private async _getExchangeContractAsync(): Promise<ExchangeContract> {
+        if (!_.isUndefined(this._exchangeContractIfExists)) {
+            return this._exchangeContractIfExists;
         }
-        const contractInstance = await this.instantiateContractIfExistsAsync((ExchangeArtifacts as any));
-        this.exchangeContractIfExists = contractInstance as ExchangeContract;
-        return this.exchangeContractIfExists;
+        const contractInstance = await this._instantiateContractIfExistsAsync((ExchangeArtifacts as any));
+        this._exchangeContractIfExists = contractInstance as ExchangeContract;
+        return this._exchangeContractIfExists;
     }
-    private async getZRXTokenAddressAsync(): Promise<string> {
-        const exchangeInstance = await this.getExchangeContractAsync();
+    private async _getZRXTokenAddressAsync(): Promise<string> {
+        const exchangeInstance = await this._getExchangeContractAsync();
         return exchangeInstance.ZRX.call();
     }
 }
diff --git a/src/contract_wrappers/token_registry_wrapper.ts b/src/contract_wrappers/token_registry_wrapper.ts
index 96346a7a4..ab0218777 100644
--- a/src/contract_wrappers/token_registry_wrapper.ts
+++ b/src/contract_wrappers/token_registry_wrapper.ts
@@ -6,19 +6,19 @@ import {ContractWrapper} from './contract_wrapper';
 import * as TokenRegistryArtifacts from '../artifacts/TokenRegistry.json';
 
 export class TokenRegistryWrapper extends ContractWrapper {
-    private tokenRegistryContractIfExists?: TokenRegistryContract;
+    private _tokenRegistryContractIfExists?: TokenRegistryContract;
     constructor(web3Wrapper: Web3Wrapper) {
         super(web3Wrapper);
     }
     public invalidateContractInstance(): void {
-        delete this.tokenRegistryContractIfExists;
+        delete this._tokenRegistryContractIfExists;
     }
     /**
      * Retrieves all the tokens currently listed in the Token Registry smart contract
      * @return  An array of JS objects that conform to the Token interface.
      */
     public async getTokensAsync(): Promise<Token[]> {
-        const tokenRegistryContract = await this.getTokenRegistryContractAsync();
+        const tokenRegistryContract = await this._getTokenRegistryContractAsync();
 
         const addresses = await tokenRegistryContract.getTokenAddresses.call();
         const tokenMetadataPromises: Array<Promise<TokenMetadata>> = _.map(
@@ -37,12 +37,12 @@ export class TokenRegistryWrapper extends ContractWrapper {
         });
         return tokens;
     }
-    private async getTokenRegistryContractAsync(): Promise<TokenRegistryContract> {
-        if (!_.isUndefined(this.tokenRegistryContractIfExists)) {
-            return this.tokenRegistryContractIfExists;
+    private async _getTokenRegistryContractAsync(): Promise<TokenRegistryContract> {
+        if (!_.isUndefined(this._tokenRegistryContractIfExists)) {
+            return this._tokenRegistryContractIfExists;
         }
-        const contractInstance = await this.instantiateContractIfExistsAsync((TokenRegistryArtifacts as any));
-        this.tokenRegistryContractIfExists = contractInstance as TokenRegistryContract;
-        return this.tokenRegistryContractIfExists;
+        const contractInstance = await this._instantiateContractIfExistsAsync((TokenRegistryArtifacts as any));
+        this._tokenRegistryContractIfExists = contractInstance as TokenRegistryContract;
+        return this._tokenRegistryContractIfExists;
     }
 }
diff --git a/src/contract_wrappers/token_wrapper.ts b/src/contract_wrappers/token_wrapper.ts
index bb79cac47..b0101c0da 100644
--- a/src/contract_wrappers/token_wrapper.ts
+++ b/src/contract_wrappers/token_wrapper.ts
@@ -11,13 +11,13 @@ import {TokenContract, ZeroExError} from '../types';
 const ALLOWANCE_TO_ZERO_GAS_AMOUNT = 45730;
 
 export class TokenWrapper extends ContractWrapper {
-    private tokenContractsByAddress: {[address: string]: TokenContract};
+    private _tokenContractsByAddress: {[address: string]: TokenContract};
     constructor(web3Wrapper: Web3Wrapper) {
         super(web3Wrapper);
-        this.tokenContractsByAddress = {};
+        this._tokenContractsByAddress = {};
     }
     public invalidateContractInstances() {
-        this.tokenContractsByAddress = {};
+        this._tokenContractsByAddress = {};
     }
     /**
      * Retrieves an owner's ERC20 token balance.
@@ -29,7 +29,7 @@ export class TokenWrapper extends ContractWrapper {
         assert.isETHAddressHex('tokenAddress', tokenAddress);
         await assert.isUserAddressAvailableAsync(this.web3Wrapper);
 
-        const tokenContract = await this.getTokenContractAsync(tokenAddress);
+        const tokenContract = await this._getTokenContractAsync(tokenAddress);
         let balance = await tokenContract.balanceOf.call(ownerAddress);
         // Wrap BigNumbers returned from web3 with our own (later) version of BigNumber
         balance = new BigNumber(balance);
@@ -51,7 +51,7 @@ export class TokenWrapper extends ContractWrapper {
         assert.isETHAddressHex('tokenAddress', tokenAddress);
         assert.isBigNumber('amountInBaseUnits', amountInBaseUnits);
 
-        const tokenContract = await this.getTokenContractAsync(tokenAddress);
+        const tokenContract = await this._getTokenContractAsync(tokenAddress);
         // Hack: for some reason default estimated gas amount causes `base fee exceeds gas limit` exception
         // on testrpc. Probably related to https://github.com/ethereumjs/testrpc/issues/294
         // TODO: Debug issue in testrpc and submit a PR, then remove this hack
@@ -74,7 +74,7 @@ export class TokenWrapper extends ContractWrapper {
         assert.isETHAddressHex('tokenAddress', tokenAddress);
         await assert.isUserAddressAvailableAsync(this.web3Wrapper);
 
-        const tokenContract = await this.getTokenContractAsync(tokenAddress);
+        const tokenContract = await this._getTokenContractAsync(tokenAddress);
         let allowanceInBaseUnits = await tokenContract.allowance.call(ownerAddress, spenderAddress);
         // Wrap BigNumbers returned from web3 with our own (later) version of BigNumber
         allowanceInBaseUnits = new BigNumber(allowanceInBaseUnits);
@@ -89,7 +89,7 @@ export class TokenWrapper extends ContractWrapper {
         assert.isETHAddressHex('ownerAddress', ownerAddress);
         assert.isETHAddressHex('tokenAddress', tokenAddress);
 
-        const proxyAddress = await this.getProxyAddressAsync();
+        const proxyAddress = await this._getProxyAddressAsync();
         const allowanceInBaseUnits = await this.getAllowanceAsync(tokenAddress, ownerAddress, proxyAddress);
         return allowanceInBaseUnits;
     }
@@ -107,7 +107,7 @@ export class TokenWrapper extends ContractWrapper {
         assert.isETHAddressHex('tokenAddress', tokenAddress);
         assert.isBigNumber('amountInBaseUnits', amountInBaseUnits);
 
-        const proxyAddress = await this.getProxyAddressAsync();
+        const proxyAddress = await this._getProxyAddressAsync();
         await this.setAllowanceAsync(tokenAddress, ownerAddress, proxyAddress, amountInBaseUnits);
     }
     /**
@@ -124,7 +124,7 @@ export class TokenWrapper extends ContractWrapper {
         assert.isETHAddressHex('toAddress', toAddress);
         assert.isBigNumber('amountInBaseUnits', amountInBaseUnits);
 
-        const tokenContract = await this.getTokenContractAsync(tokenAddress);
+        const tokenContract = await this._getTokenContractAsync(tokenAddress);
 
         const fromAddressBalance = await this.getBalanceAsync(tokenAddress, fromAddress);
         if (fromAddressBalance.lessThan(amountInBaseUnits)) {
@@ -155,7 +155,7 @@ export class TokenWrapper extends ContractWrapper {
         await assert.isSenderAddressAsync('senderAddress', senderAddress, this.web3Wrapper);
         assert.isBigNumber('amountInBaseUnits', amountInBaseUnits);
 
-        const tokenContract = await this.getTokenContractAsync(tokenAddress);
+        const tokenContract = await this._getTokenContractAsync(tokenAddress);
 
         const fromAddressAllowance = await this.getAllowanceAsync(tokenAddress, fromAddress, senderAddress);
         if (fromAddressAllowance.lessThan(amountInBaseUnits)) {
@@ -171,17 +171,17 @@ export class TokenWrapper extends ContractWrapper {
             from: senderAddress,
         });
     }
-    private async getTokenContractAsync(tokenAddress: string): Promise<TokenContract> {
-        let tokenContract = this.tokenContractsByAddress[tokenAddress];
+    private async _getTokenContractAsync(tokenAddress: string): Promise<TokenContract> {
+        let tokenContract = this._tokenContractsByAddress[tokenAddress];
         if (!_.isUndefined(tokenContract)) {
             return tokenContract;
         }
-        const contractInstance = await this.instantiateContractIfExistsAsync((TokenArtifacts as any), tokenAddress);
+        const contractInstance = await this._instantiateContractIfExistsAsync((TokenArtifacts as any), tokenAddress);
         tokenContract = contractInstance as TokenContract;
-        this.tokenContractsByAddress[tokenAddress] = tokenContract;
+        this._tokenContractsByAddress[tokenAddress] = tokenContract;
         return tokenContract;
     }
-    private async getProxyAddressAsync() {
+    private async _getProxyAddressAsync() {
         const networkIdIfExists = await this.web3Wrapper.getNetworkIdIfExistsAsync();
         const proxyNetworkConfigsIfExists = _.isUndefined(networkIdIfExists) ?
                                        undefined :