PreferSenderFunction

Severity: Low | Category: Optimization

A detector that finds context().sender calls that could be replaced with more gas-effective sender() call.

Why is it bad?

You can obtain the address of the message sender using either the Context struct or the sender function. If you only need the address and no additional context on the incoming message , you should prefer less gas-expensive sender().

See: https://docs.tact-lang.org/book/gas-best-practices/#use-sender-over-contextsender

Example

let ctx = context(); // Bad: only .sender is accessed
message(MessageParameters{
  to: ctx.sender,
  value: ton("0.05"),
});

Use instead:

message(MessageParameters{
  to: sender(),
  value: ton("0.05"),
});