SuboptimalSend

A detector that identifies suboptimal message passing functions that could be replaced with more gas-effective alternatives.

Tact 1.6 introduced more gas-effective alternatives to send that might decrease gas consumption when used properly:

• message: a regular non-deployment message
• deploy: an effective contract deployment function
• cashback: more efficient way to send the remaining balance

Why is it bad?

Using suboptimal send functions might lead to out-of-gas attacks, especially when using at hot points.

Example

let init = initOf SomeContract(p1, p2, p3);
send(SendParameters{
  to: contractAddress(init),
  code: init.code,
  data: init.data,
  value: 0,
  body: FooBar{}.asCell(),
});

Use instead:

deploy(DeployParameters{
  init: initOf SomeContract(p1, p2, p3),
  value: 0,
  body: FooBar{}.asCell(),
});