Add Documentation; Remove Pending Tx on reject (#114)

README.md

@@ -5,3 +5,24 @@ This is the repository for [uniswap.io](https://uniswap.io/). Uniswap is an inte
 * Join the reddit: [https://www.reddit.com/r/Uniswap/](https://www.reddit.com/r/UniSwap/)
 * Email us: [contact@uniswap.io](mailto:contact@uniswap.io)
 * Read the whitepaper: [Link](https://hackmd.io/C-DvwDSfSxuh-Gd4WKE_ig)
+
+
+### To Start Development
+
+###### Installing dependency
+```bash
+yarn
+```
+
+###### Running locally on Rinkeby
+```bash
+yarn start:rinkeby
+```
+
+###### Running locally on other testnet
+```bash
+REACT_APP_NETWORK_ID=2 REACT_APP_NETWORK='Ropsten Test Network' react-scripts start
+```
+
+### Contributions
+Please open all pull requests against `dev` branch. 

src/ducks/web3connect.js

@@ -342,18 +342,30 @@ export const sync = () => async (dispatch, getState) => {
     });
 
   pending.forEach(async txId => {
-    const data = await web3.eth.getTransactionReceipt(txId) || {};
-    if (data.status) {
+    try {
+      const data = await web3.eth.getTransactionReceipt(txId) || {};
+
       dispatch({
         type: REMOVE_PENDING_TX,
         payload: txId,
       });
 
+      if (data.status) {
+        dispatch({
+          type: ADD_CONFIRMED_TX,
+          payload: txId,
+        });
+      } else {
+        // TODO: dispatch ADD_REJECTED_TX
+      }
+    } catch (err) {
       dispatch({
-        type: ADD_CONFIRMED_TX,
+        type: REMOVE_PENDING_TX,
         payload: txId,
       });
+      // TODO: dispatch ADD_REJECTED_TX
     }
+
   });
 };