Implement zeroEx.awaitTransactionMined

2 files changed, 18 insertions, 0 deletions

diff --git a/src/0x.ts b/src/0x.ts
index 3cf672a1b..e92c92e1f 100644
--- a/src/0x.ts
+++ b/src/0x.ts
@@ -1,5 +1,6 @@
 import * as _ from 'lodash';
 import * as BigNumber from 'bignumber.js';
+import * as Web3 from 'web3';
 import {SchemaValidator, schemas} from '0x-json-schemas';
 import {bigNumberConfigs} from './bignumber_config';
 import * as ethUtil from 'ethereumjs-util';
@@ -248,4 +249,17 @@ export class ZeroEx {
 
         throw new Error(ZeroExError.InvalidSignature);
     }
+    public async awaitTransactionMined(txHash: string,
+                                       pollingIntervalMs: number = 500): Promise<Web3.TransactionReceipt> {
+        const txReceiptPromise = new Promise((resolve: (receipt: Web3.TransactionReceipt) => void, reject) => {
+            const intervalId = setInterval(async () => {
+                const transactionReceipt = await this._web3Wrapper.getTransactionReceiptAsync(txHash);
+                if (!_.isNull(transactionReceipt)) {
+                     clearInterval(intervalId);
+                     resolve(transactionReceipt);
+                }
+            }, pollingIntervalMs);
+        });
+        return txReceiptPromise;
+    }
 }
diff --git a/src/web3_wrapper.ts b/src/web3_wrapper.ts
index 129017e7c..f3fe8a00b 100644
--- a/src/web3_wrapper.ts
+++ b/src/web3_wrapper.ts
@@ -27,6 +27,10 @@ export class Web3Wrapper {
         const nodeVersion = await promisify(this.web3.version.getNode)();
         return nodeVersion;
     }
+    public async getTransactionReceiptAsync(txHash: string): Promise<Web3.TransactionReceipt> {
+        const transactionReceipt = await promisify(this.web3.eth.getTransactionReceipt)(txHash);
+        return transactionReceipt;
+    }
     public getCurrentProvider(): Web3.Provider {
         return this.web3.currentProvider;
     }