FlexGas (or similar solutions) on $ETH is not a native function of the network, but an overlay through smart contracts or wallets, allowing you to pay the transaction fee (gas) in USDT (or another token) instead of ETH. Here’s how it works and what to expect in Pectra:

How it works:

Mediator smart contract: You initiate a transaction (for example, sending USDT) in your wallet that supports FlexGas (or similar function).

Fee calculation in USDT: The wallet or smart contract calculates the equivalent gas cost.