Maybe the gas concept is for dealing with the delay of contract execution. After someone published a transaction, the miners need some time to execute it, then return the result. The ethereum account models seem from the Omni layer, and the smart contract system looks like a second layer of blockchain, so they need a second coin.
Maybe the gas concept is for dealing with the delay of contract execution. After someone published a transaction, the miners need some time to execute it, then return the result. The ethereum account models seem from the Omni layer, and the smart contract system looks like a second layer of blockchain, so they need a second coin.