When you interact on a blockchain, you must pay a certain amount of transaction fee, which is called Gas. Without paying Gas, the transaction cannot be completed. The type of Gas token required may vary across different blockchains, and you don’t need to memorize this right now. When you interact with a specific blockchain, check which Gas token is needed for that chain, and then transfer the required amount of Gas token to that chain. Common ways to obtain Gas tokens include:Withdraw tokens ...