How to know from Solidity contract that a transaction is being simulated?

Question

Is there a way to know from a Solidity contract that the current transaction is being simulated and is not going to be included in the blockchain? When I mention "from the contract" I mean from the contract of the token that is being exchanged.

I'm mostly referring to Uniswap token swap transactions.

I mean this type of simulation:

is it possible to run pending transactions on local node to see the outcome?

score 0 · Answer 1 · answered Sep 05 '21 at 10:08

0

I don't think there is any property a contract could consult to know if it's live or a simulation. I also don't know of a reason for wanting to.

answered Sep 05 '21 at 10:08

Rob Hitchens

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This should be a comment rather than an answer. – user2983041 Sep 05 '21 at 10:19
The answer is no. – Rob Hitchens Sep 05 '21 at 19:39
I have proof that there are people who are doing that. Yes, it is possible, but I do not know how they do it. – user2983041 Sep 06 '21 at 18:10
I'm curious. Send it. – Rob Hitchens Sep 07 '21 at 02:58

How to know from Solidity contract that a transaction is being simulated?

1 Answers1