Merge pull request #82 from 0xProject/add-exchange-address-to-order-struct

Allow multiple Exchange contracts and multiple artifacts

1 files changed, 33 insertions, 0 deletions

diff --git a/src/contract_wrappers/proxy_wrapper.ts b/src/contract_wrappers/proxy_wrapper.ts
new file mode 100644
index 000000000..862bce131
--- /dev/null
+++ b/src/contract_wrappers/proxy_wrapper.ts
@@ -0,0 +1,33 @@
+import * as _ from 'lodash';
+import {Web3Wrapper} from '../web3_wrapper';
+import {ContractWrapper} from './contract_wrapper';
+import * as ProxyArtifacts from '../artifacts/Proxy.json';
+import {ProxyContract} from '../types';
+
+/**
+ * This class includes the functionality related to interacting with the Proxy contract.
+ */
+export class ProxyWrapper extends ContractWrapper {
+    private _proxyContractIfExists?: ProxyContract;
+    public invalidateContractInstance(): void {
+        delete this._proxyContractIfExists;
+    }
+    /**
+     * Check if the Exchange contract address is authorized by the Proxy contract.
+     * @param   exchangeContractAddress     The hex encoded address of the Exchange contract to use.
+     * @return  Whether the exchangeContractAddress is authorized.
+     */
+    public async isAuthorizedAsync(exchangeContractAddress: string): Promise<boolean> {
+        const proxyContractInstance = await this._getProxyContractAsync();
+        const isAuthorized = await proxyContractInstance.authorized.call(exchangeContractAddress);
+        return isAuthorized;
+    }
+    private async _getProxyContractAsync(): Promise<ProxyContract> {
+        if (!_.isUndefined(this._proxyContractIfExists)) {
+            return this._proxyContractIfExists;
+        }
+        const contractInstance = await this._instantiateContractIfExistsAsync((ProxyArtifacts as any));
+        this._proxyContractIfExists = contractInstance as ProxyContract;
+        return this._proxyContractIfExists;
+    }
+}