What Is a “Gas Stipend” in the Context of External Calls?
A gas stipend is a small, fixed amount of gas provided to a recipient contract when a function like transfer or send is used to send Ether. Historically, transfer provided a 2,300 gas stipend.
This was intended to allow the recipient's fallback function to log the transaction or perform minimal safety checks, but not enough to execute a reentrancy attack.
