Add scratch.js file for REPL stuff

scripts/scratch.js

@@ -0,0 +1,19 @@
+// Scratch code, to be pasted into a REPL
+
+var erc20address = "0x2279B7A0a67DB372996a5FaB50D91eAA73d2eBe6";
+//SimpleSwapFactory: 0x8A791620dd6260079BF849Dc5567aDC3F2FdC318
+var aliceAddress = "0xf39Fd6e51aad88F6F4ce6aB8827279cffFb92266";
+//Bob address: 0x70997970C51812dc3A010C7d01b50e0d17dc79C8
+//AliceSwapAddress: 0x8aCd85898458400f7Db866d53FCFF6f0D49741FF
+//BobSwapAddress: 0xe082b26cEf079a095147F35c9647eC97c2401B83
+
+var erc20artifact = await artifacts.readArtifact("ERC20PresetMinterPauser");
+var signers = await ethers.getSigners();
+var aliceSigner = signers[0];
+var erc20contract = new ethers.Contract(erc20address, erc20artifact.abi, aliceSigner);
+
+// Mint ERC20
+await erc20contract.mint(aliceAddress, 10000);
+
+var aliceBalance = await erc20contract.balanceOf(aliceAddress);
+aliceBalance.toNumber(); // => 1000