1 files changed, 112 insertions, 112 deletions
diff --git a/packages/0x.js/src/contract_wrappers/token_registry_wrapper.ts b/packages/0x.js/src/contract_wrappers/token_registry_wrapper.ts
index bce48a590..f54aaf0f8 100644
--- a/packages/0x.js/src/contract_wrappers/token_registry_wrapper.ts
+++ b/packages/0x.js/src/contract_wrappers/token_registry_wrapper.ts
@@ -13,117 +13,117 @@ import { TokenRegistryContract } from './generated/token_registry';
  * This class includes all the functionality related to interacting with the 0x Token Registry smart contract.
  */
 export class TokenRegistryWrapper extends ContractWrapper {
-	private _tokenRegistryContractIfExists?: TokenRegistryContract;
-	private _contractAddressIfExists?: string;
-	private static _createTokenFromMetadata(metadata: TokenMetadata): Token | undefined {
-		if (metadata[0] === constants.NULL_ADDRESS) {
-			return undefined;
-		}
-		const token = {
-			address: metadata[0],
-			name: metadata[1],
-			symbol: metadata[2],
-			decimals: metadata[3].toNumber(),
-		};
-		return token;
-	}
-	constructor(web3Wrapper: Web3Wrapper, networkId: number, contractAddressIfExists?: string) {
-		super(web3Wrapper, networkId);
-		this._contractAddressIfExists = contractAddressIfExists;
-	}
-	/**
-	 * Retrieves all the tokens currently listed in the Token Registry smart contract
-	 * @return  An array of objects that conform to the Token interface.
-	 */
-	public async getTokensAsync(): Promise<Token[]> {
-		const addresses = await this.getTokenAddressesAsync();
-		const tokenPromises: Array<Promise<Token | undefined>> = _.map(addresses, async (address: string) =>
-			this.getTokenIfExistsAsync(address),
-		);
-		const tokens = await Promise.all(tokenPromises);
-		return tokens as Token[];
-	}
-	/**
-	 * Retrieves all the addresses of the tokens currently listed in the Token Registry smart contract
-	 * @return  An array of token addresses.
-	 */
-	public async getTokenAddressesAsync(): Promise<string[]> {
-		const tokenRegistryContract = await this._getTokenRegistryContractAsync();
-		const addresses = await tokenRegistryContract.getTokenAddresses.callAsync();
-		return addresses;
-	}
-	/**
-	 * Retrieves a token by address currently listed in the Token Registry smart contract
-	 * @return  An object that conforms to the Token interface or undefined if token not found.
-	 */
-	public async getTokenIfExistsAsync(address: string): Promise<Token | undefined> {
-		assert.isETHAddressHex('address', address);
+    private _tokenRegistryContractIfExists?: TokenRegistryContract;
+    private _contractAddressIfExists?: string;
+    private static _createTokenFromMetadata(metadata: TokenMetadata): Token | undefined {
+        if (metadata[0] === constants.NULL_ADDRESS) {
+            return undefined;
+        }
+        const token = {
+            address: metadata[0],
+            name: metadata[1],
+            symbol: metadata[2],
+            decimals: metadata[3].toNumber(),
+        };
+        return token;
+    }
+    constructor(web3Wrapper: Web3Wrapper, networkId: number, contractAddressIfExists?: string) {
+        super(web3Wrapper, networkId);
+        this._contractAddressIfExists = contractAddressIfExists;
+    }
+    /**
+     * Retrieves all the tokens currently listed in the Token Registry smart contract
+     * @return  An array of objects that conform to the Token interface.
+     */
+    public async getTokensAsync(): Promise<Token[]> {
+        const addresses = await this.getTokenAddressesAsync();
+        const tokenPromises: Array<Promise<Token | undefined>> = _.map(addresses, async (address: string) =>
+            this.getTokenIfExistsAsync(address),
+        );
+        const tokens = await Promise.all(tokenPromises);
+        return tokens as Token[];
+    }
+    /**
+     * Retrieves all the addresses of the tokens currently listed in the Token Registry smart contract
+     * @return  An array of token addresses.
+     */
+    public async getTokenAddressesAsync(): Promise<string[]> {
+        const tokenRegistryContract = await this._getTokenRegistryContractAsync();
+        const addresses = await tokenRegistryContract.getTokenAddresses.callAsync();
+        return addresses;
+    }
+    /**
+     * Retrieves a token by address currently listed in the Token Registry smart contract
+     * @return  An object that conforms to the Token interface or undefined if token not found.
+     */
+    public async getTokenIfExistsAsync(address: string): Promise<Token | undefined> {
+        assert.isETHAddressHex('address', address);
 
-		const tokenRegistryContract = await this._getTokenRegistryContractAsync();
-		const metadata = await tokenRegistryContract.getTokenMetaData.callAsync(address);
-		const token = TokenRegistryWrapper._createTokenFromMetadata(metadata);
-		return token;
-	}
-	public async getTokenAddressBySymbolIfExistsAsync(symbol: string): Promise<string | undefined> {
-		assert.isString('symbol', symbol);
-		const tokenRegistryContract = await this._getTokenRegistryContractAsync();
-		const addressIfExists = await tokenRegistryContract.getTokenAddressBySymbol.callAsync(symbol);
-		if (addressIfExists === constants.NULL_ADDRESS) {
-			return undefined;
-		}
-		return addressIfExists;
-	}
-	public async getTokenAddressByNameIfExistsAsync(name: string): Promise<string | undefined> {
-		assert.isString('name', name);
-		const tokenRegistryContract = await this._getTokenRegistryContractAsync();
-		const addressIfExists = await tokenRegistryContract.getTokenAddressByName.callAsync(name);
-		if (addressIfExists === constants.NULL_ADDRESS) {
-			return undefined;
-		}
-		return addressIfExists;
-	}
-	public async getTokenBySymbolIfExistsAsync(symbol: string): Promise<Token | undefined> {
-		assert.isString('symbol', symbol);
-		const tokenRegistryContract = await this._getTokenRegistryContractAsync();
-		const metadata = await tokenRegistryContract.getTokenBySymbol.callAsync(symbol);
-		const token = TokenRegistryWrapper._createTokenFromMetadata(metadata);
-		return token;
-	}
-	public async getTokenByNameIfExistsAsync(name: string): Promise<Token | undefined> {
-		assert.isString('name', name);
-		const tokenRegistryContract = await this._getTokenRegistryContractAsync();
-		const metadata = await tokenRegistryContract.getTokenByName.callAsync(name);
-		const token = TokenRegistryWrapper._createTokenFromMetadata(metadata);
-		return token;
-	}
-	/**
-	 * Retrieves the Ethereum address of the TokenRegistry contract deployed on the network
-	 * that the user-passed web3 provider is connected to.
-	 * @returns The Ethereum address of the TokenRegistry contract being used.
-	 */
-	public getContractAddress(): string {
-		const contractAddress = this._getContractAddress(
-			artifacts.TokenRegistryArtifact,
-			this._contractAddressIfExists,
-		);
-		return contractAddress;
-	}
-	private _invalidateContractInstance(): void {
-		delete this._tokenRegistryContractIfExists;
-	}
-	private async _getTokenRegistryContractAsync(): Promise<TokenRegistryContract> {
-		if (!_.isUndefined(this._tokenRegistryContractIfExists)) {
-			return this._tokenRegistryContractIfExists;
-		}
-		const web3ContractInstance = await this._instantiateContractIfExistsAsync(
-			artifacts.TokenRegistryArtifact,
-			this._contractAddressIfExists,
-		);
-		const contractInstance = new TokenRegistryContract(
-			web3ContractInstance,
-			this._web3Wrapper.getContractDefaults(),
-		);
-		this._tokenRegistryContractIfExists = contractInstance;
-		return this._tokenRegistryContractIfExists;
-	}
+        const tokenRegistryContract = await this._getTokenRegistryContractAsync();
+        const metadata = await tokenRegistryContract.getTokenMetaData.callAsync(address);
+        const token = TokenRegistryWrapper._createTokenFromMetadata(metadata);
+        return token;
+    }
+    public async getTokenAddressBySymbolIfExistsAsync(symbol: string): Promise<string | undefined> {
+        assert.isString('symbol', symbol);
+        const tokenRegistryContract = await this._getTokenRegistryContractAsync();
+        const addressIfExists = await tokenRegistryContract.getTokenAddressBySymbol.callAsync(symbol);
+        if (addressIfExists === constants.NULL_ADDRESS) {
+            return undefined;
+        }
+        return addressIfExists;
+    }
+    public async getTokenAddressByNameIfExistsAsync(name: string): Promise<string | undefined> {
+        assert.isString('name', name);
+        const tokenRegistryContract = await this._getTokenRegistryContractAsync();
+        const addressIfExists = await tokenRegistryContract.getTokenAddressByName.callAsync(name);
+        if (addressIfExists === constants.NULL_ADDRESS) {
+            return undefined;
+        }
+        return addressIfExists;
+    }
+    public async getTokenBySymbolIfExistsAsync(symbol: string): Promise<Token | undefined> {
+        assert.isString('symbol', symbol);
+        const tokenRegistryContract = await this._getTokenRegistryContractAsync();
+        const metadata = await tokenRegistryContract.getTokenBySymbol.callAsync(symbol);
+        const token = TokenRegistryWrapper._createTokenFromMetadata(metadata);
+        return token;
+    }
+    public async getTokenByNameIfExistsAsync(name: string): Promise<Token | undefined> {
+        assert.isString('name', name);
+        const tokenRegistryContract = await this._getTokenRegistryContractAsync();
+        const metadata = await tokenRegistryContract.getTokenByName.callAsync(name);
+        const token = TokenRegistryWrapper._createTokenFromMetadata(metadata);
+        return token;
+    }
+    /**
+     * Retrieves the Ethereum address of the TokenRegistry contract deployed on the network
+     * that the user-passed web3 provider is connected to.
+     * @returns The Ethereum address of the TokenRegistry contract being used.
+     */
+    public getContractAddress(): string {
+        const contractAddress = this._getContractAddress(
+            artifacts.TokenRegistryArtifact,
+            this._contractAddressIfExists,
+        );
+        return contractAddress;
+    }
+    private _invalidateContractInstance(): void {
+        delete this._tokenRegistryContractIfExists;
+    }
+    private async _getTokenRegistryContractAsync(): Promise<TokenRegistryContract> {
+        if (!_.isUndefined(this._tokenRegistryContractIfExists)) {
+            return this._tokenRegistryContractIfExists;
+        }
+        const web3ContractInstance = await this._instantiateContractIfExistsAsync(
+            artifacts.TokenRegistryArtifact,
+            this._contractAddressIfExists,
+        );
+        const contractInstance = new TokenRegistryContract(
+            web3ContractInstance,
+            this._web3Wrapper.getContractDefaults(),
+        );
+        this._tokenRegistryContractIfExists = contractInstance;
+        return this._tokenRegistryContractIfExists;
+    }
 }