There’s a token on Ethereum which seems to be very famous according to the number of peoples using it and the amount of money collected.

But yet, Googling the function names as well as the Stellar del Futoro (the name of the Ethereum token) yells no website at all whereas an ᴀʙɪ file is required to use such kind of smart‑contract and since it’s not on Etherscan, it needs to be on a website (obviously the one from the organization managing the project).

So the best way to get more information would be to ask some users at random. The Ethereum system allows to send data to anyone in hex, which means using numbers and the letters from A to F (even using spaces is impossible).

Now that I explained the purpose, the part which isn’t related to technology (and can be used in other contexts like in the street) : how do you tell to someone at random you want to ask him/her a question using numbers and the letters from A to F in a way he/she recognize this isn’t just like that but this is text and that you want a reply ?


The purpose might be on topic but the question is: What if for a different reason it would had to be done using a paper?

  • $\begingroup$ So far I only found 0x000000000000000000DeaD which doesn’t seems to yield any reply from the peoples who received it. $\endgroup$ – user2284570 Nov 6 '19 at 3:56
  • $\begingroup$ 0xDEADBEEF is another funny hex text - might prompt a conversation from some systems programmers $\endgroup$ – Avi Nov 6 '19 at 3:59
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    $\begingroup$ This seems like a problem you might want to solve, but not a puzzle -- there's not really a definite solution, and answers will be highly subjectively valid. $\endgroup$ – Deusovi Nov 6 '19 at 4:15
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    $\begingroup$ I have to be honest and say I'm not sure what you're asking or why you're asking it. You should edit this to fully explain the context and the requirements. $\endgroup$ – F1Krazy Nov 6 '19 at 10:12
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    $\begingroup$ This question seems pretty clearly off-topic: it doesn't appear to be related to puzzles except incidentally in that one of the possible methods might be vaguely similar to a puzzle. A question that depends this much on human interpretation is going to be one where any answer is subjectively correct. $\endgroup$ – Deusovi Nov 7 '19 at 4:06

Assuming that the person you are contacting has puzzle-solving skills:


A breakdown:


The first 16 digits are just 1 to 16 in HEX, to get their attention and show that this isn't random


i.e. Ascii, to help them decode the next bit


The Message, in Hex-encoded Ascii, including "Start of Text" and "End of Text" tags:

 01  49  20  77  61  6E  74  20  74  6F  20  74  61  6C  6B  20  74  6F  20  79  6F  75  03
 SOT|"I"|" "|"W" "A" "N" "T"|" "|"T" "O"|" "|"T" "A" "L" "K"|" "|"T" "O"|" "|"Y" "O" "U"|EOT
  • $\begingroup$ Judging by the daily activity peak, the thing seems to be Asian which means they don’t have English phonemes in mind. Also all attempts to send the most basic ASCII encoded English message failed (though all software required to use Ethereum like this use only the Latin alphabet). $\endgroup$ – user2284570 Nov 7 '19 at 2:37

This tells the person it's not a random string because it has no letters. (The chances of that occurring at random in a message this length if characters are chosen uniformly is minuscule.) And then the fact there are a bunch of 00s in it will hopefully lead him to look at pairs of numbers, which will show him that none go beyond 25 and thus get him to translate them into letters of the alphabet (with 00 for space).

  • $\begingroup$ Could you explain how this meets the OP's requirements? $\endgroup$ – F1Krazy Nov 6 '19 at 11:19
  • $\begingroup$ @F1Krazy done, methinks $\endgroup$ – msh210 Nov 6 '19 at 11:24
  • $\begingroup$ @msh210 if you received a sms like this from a casino, I hugely doubt you would get the idea that this prompt a reply (despite what you’re stating is true). $\endgroup$ – user2284570 Nov 7 '19 at 2:51

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