1 files changed, 72 insertions, 0 deletions
diff --git a/packages/contract-wrappers/src/contract_wrappers/token_transfer_proxy_wrapper.ts b/packages/contract-wrappers/src/contract_wrappers/token_transfer_proxy_wrapper.ts
new file mode 100644
index 000000000..02a2e19d0
--- /dev/null
+++ b/packages/contract-wrappers/src/contract_wrappers/token_transfer_proxy_wrapper.ts
@@ -0,0 +1,72 @@
+import { Web3Wrapper } from '@0xproject/web3-wrapper';
+import * as _ from 'lodash';
+
+import { artifacts } from '../artifacts';
+import { assert } from '../utils/assert';
+
+import { ContractWrapper } from './contract_wrapper';
+import { TokenTransferProxyContract } from './generated/token_transfer_proxy';
+
+/**
+ * This class includes the functionality related to interacting with the TokenTransferProxy contract.
+ */
+export class TokenTransferProxyWrapper extends ContractWrapper {
+    private _tokenTransferProxyContractIfExists?: TokenTransferProxyContract;
+    private _contractAddressIfExists?: string;
+    constructor(web3Wrapper: Web3Wrapper, networkId: number, contractAddressIfExists?: string) {
+        super(web3Wrapper, networkId);
+        this._contractAddressIfExists = contractAddressIfExists;
+    }
+    /**
+     * Check if the Exchange contract address is authorized by the TokenTransferProxy contract.
+     * @param   exchangeContractAddress     The hex encoded address of the Exchange contract to call.
+     * @return  Whether the exchangeContractAddress is authorized.
+     */
+    public async isAuthorizedAsync(exchangeContractAddress: string): Promise<boolean> {
+        assert.isETHAddressHex('exchangeContractAddress', exchangeContractAddress);
+        const normalizedExchangeContractAddress = exchangeContractAddress.toLowerCase();
+        const tokenTransferProxyContractInstance = await this._getTokenTransferProxyContractAsync();
+        const isAuthorized = await tokenTransferProxyContractInstance.authorized.callAsync(
+            normalizedExchangeContractAddress,
+        );
+        return isAuthorized;
+    }
+    /**
+     * Get the list of all Exchange contract addresses authorized by the TokenTransferProxy contract.
+     * @return  The list of authorized addresses.
+     */
+    public async getAuthorizedAddressesAsync(): Promise<string[]> {
+        const tokenTransferProxyContractInstance = await this._getTokenTransferProxyContractAsync();
+        const authorizedAddresses = await tokenTransferProxyContractInstance.getAuthorizedAddresses.callAsync();
+        return authorizedAddresses;
+    }
+    /**
+     * Retrieves the Ethereum address of the TokenTransferProxy contract deployed on the network
+     * that the user-passed web3 provider is connected to.
+     * @returns The Ethereum address of the TokenTransferProxy contract being used.
+     */
+    public getContractAddress(): string {
+        const contractAddress = this._getContractAddress(artifacts.TokenTransferProxy, this._contractAddressIfExists);
+        return contractAddress;
+    }
+    private _invalidateContractInstance(): void {
+        delete this._tokenTransferProxyContractIfExists;
+    }
+    private async _getTokenTransferProxyContractAsync(): Promise<TokenTransferProxyContract> {
+        if (!_.isUndefined(this._tokenTransferProxyContractIfExists)) {
+            return this._tokenTransferProxyContractIfExists;
+        }
+        const [abi, address] = await this._getContractAbiAndAddressFromArtifactsAsync(
+            artifacts.TokenTransferProxy,
+            this._contractAddressIfExists,
+        );
+        const contractInstance = new TokenTransferProxyContract(
+            abi,
+            address,
+            this._web3Wrapper.getProvider(),
+            this._web3Wrapper.getContractDefaults(),
+        );
+        this._tokenTransferProxyContractIfExists = contractInstance;
+        return this._tokenTransferProxyContractIfExists;
+    }
+}