This is a brief tutorial for Keycat (Brower-based Wallet). Let’s sign-in a BApp with a Klaytn account already registered in Keycat. Now, let’s start from registering a new Klaytn account to Keycat Click “save” to save account in Keychain. This will enable your one-click sign-in next time. Let’s check if our sample BApp (rate-and-donate function) works with Keycat. Rate first and click on “Donate”. Once you click “Next” in a pop-up, Keycat will sign your transaction using the registered account. Your transaction is completed successfully and now appears under the “Donation History”. Now, let’s switch to another Klaytn account. All registered accounts appear when you click the “below” arrow. Select the account and try to make one more donation. It is done successfully. Thank you for watching!