Add get balance task

hardhat.config.js

@@ -44,6 +44,13 @@ task("redeemCheque", "Redeem cheque")
     console.log(JSON.stringify(resp));
   });
 
+task("getBalances", "Get ERC20 Balances for Alice and Bob")
+  .addParam("erc20address", "ERC20 Address")
+  .setAction(async taskArgs => {
+    var resp = await swap.getBalances(taskArgs.erc20address);
+    console.log(JSON.stringify(resp));
+  });
+
 // You need to export an object to set up your config
 // Go to https://hardhat.org/config/ to learn more
 

src/swap-helpers.js

@@ -151,14 +151,25 @@ async function redeemCheque(aliceSwapAddress, issuerSig) {
     var foo = await swapContract.cashChequeBeneficiary(recipient, cumulativePayout, issuerSig);
     console.log("Resp", foo);
 
-    // Reproduced error here:
+    return {resp: foo};
-    // ProviderError: VM Exception while processing transaction: revert SimpleSwap: invalid issuer signature
-    // TODO Fix it
-
-    return {resp: foo}
 
 };
 
+async function getBalances(erc20address) {
+    var erc20artifact = await artifacts.readArtifact("ERC20PresetMinterPauser");
+    var signers = await ethers.getSigners();
+    var aliceSigner = signers[0];
+    var erc20contract = new ethers.Contract(erc20address, erc20artifact.abi, aliceSigner);
+
+    var aliceBalance = await erc20contract.balanceOf(aliceAddress);
+    var bobBalance = await erc20contract.balanceOf(bobAddress);
+
+    return {aliceBalance: aliceBalance.toNumber(),
+            bobBalance: bobBalance.toNumber()};
+}
+
+
 module.exports.setupSwap = setupSwap;
 module.exports.signCheque = signCheque;
 module.exports.redeemCheque = redeemCheque;
+module.exports.getBalances = getBalances;