EthVM Survey Giveaway

survey-giveaway.md

Blockchain Explorer Survey

5 MEW Engraved Ledger Nano S and Stickers Giveaway

Rules

• Survey must be thoughtful
• Valid
• No spamming
• Must answer all questions, including open ended responses

Procedure

• At the conclusion of the survey, we will publish a list of KECCAK-256 hashes of lowercased twitter handles or email addresses which are eligible (To somewhat hide user information)
• We will pick a blocknumber atleast 1000+ blocks into the future, lets call this N
• Then we will collect the Hashes of blockHash(N),blockHash(N+1),blockHash(N+2),blockHash(N+3),blockHash(N+4) (Total of 5 blockhashes, 5 is the number of Ledger Nano S)
• Then use following formula to select the Winners,
  • NE number of entries

  function randomGen(uint blockHash) constant returns (uint randomNumber) {
      return(blockHash % NE);
  }
  

  • This will return the winning positions of the published list, list is 0 based. If it returns the same number twice, we will pick the next in line!