then my bot will also send a transaction to B at the same exact time,so that in the blockchain it is impossible to say which one is earliest.
Is it possible? Can you expnain the mechanism, including the time it takes for a tx to be accepted. Thank you.
The both transactions being confirmed the same time is possible though the chances are also thin but it is not as thin as that of both transaction being broadcasted at the same time this is because based on your setup you would need the transaction to have only been broadcasted before the bot would have picked it up. Plus the time gap your bot would need to create another transaction will also prevent both from being confirmed same time.
No It does not work that way, transactions are included in blocks and if your bot detects the address has already sent the transaction, meaning it has received at least 1 confirmation.
Nope if the op is tracking the other wallet especially via public key he will find the transaction immediately it's broadcasted. Similarly if he's tracking same address he will also see the broadcast immediately that's why it's a public ledger.