IDcollectionsQuizchain2

quizchain2/5

Solved on 2019-05-14 after 0s, key derived from the published recipe. 0.007 BTC on Bitcoin.

Story

What the post asked, what the answer turned out to be, and what the chain says happened. The record below holds the data.

Five words, five vowels

May 14. "Five words." One space between them, no period. MD5 prefix e7a. No TOMI, no link. The author checked the entropy and thought it was safe.

u/BrainForceOne had it in 25 minutes: bat bot bit bet but. How? Block 49 of the first run used hat hot hit. They'd already wondered whether it extends to every vowel. "So I had the solution in my mind before block 5 was posted." Sixth try.

The author's favorite detail: the "bit" in Bitcoin works with almost every vowel. Only Y is missing.

Stuck in the mempool

Then the money got stuck. The author sent the funding transaction ten minutes before posting, with the default fee. It didn't confirm. BrainForceOne's claim spent that unconfirmed output, also with a low fee, from a phone.

Hours later BrainForceOne wrote that someone tried a double spend with a 2 mBTC fee. Can't trust people, right? The double spend didn't land. Both the funding and the claim confirmed in the same block, at 21:58:48 UTC. So the chain says the block was solved in zero seconds. Technically correct.

The claim pays 1Thanksg9t4MRoCH2CM3cArWq26JiNvMY, and BrainForceOne says it's theirs. The author: "Nice vanity address there :)"

IDquizchain2/505 / 102019-05-14
Puzzle / quizchain2

5

bitcoinp2pkh solved

Record 

bitcoinPuzzle({
  address: p2pkh("18ufPz33qyBD…3abJh39b", "56be8fe4f52f…a654cc1c"),
  status: Status.Solved,
  key: wif("L1FbCRrq4fcM…bYiyvrWJ").entropy("e7a18731a7a9…adbd50af", source("https://www.…block_5/")).derived(),
})
Prize
0.007 BTC
Key material
wif, derived from the recipe
Verification
verified
Solved
2019-05-14 · 0s
tx 2
Trail
Explorerblockstream.info
Sourcereddit.com/r/bitcoinpuzzles/comments/boil0p/7_mbtc_quizchain2_block_5
Tryquizchain2/5 in the playground
Address
18ufPz33qyBDAHxhxtAMrze5yq3abJh39b

hash160 56be8fe4f52f11097ac4d04a6baaf867a654cc1c

Balance
asking the explorer

Key

public key · compressed
031b83ff60f6c90c2de6cb4c974d21d9fa45ede95d3109337a12f5e9d7693ec548
WIF
L1FbCRrq4fcMc7Lrk5avV3uGWUhtAZGyaTkqzWVdAc5NbYiyvrWJ
entropy hash
e7a18731a7a9520baec7a428adbd50af
entropy source
MD5 of the five words

Transactions

  1. funding2019-05-140.007 BTC0dcc393425…655e18
  2. claim2019-05-140.00695949 BTC360d1f0040…ba0da2

Hints

  1. undated

    officialQuestion: Five words.

    Sourcereddit.com/r/bitcoinpuzzles/comments/boil0p/7_mbtc_quizchain2_block_5

    Published answer

    Solution was "bat bot bit bet but".

    Sourcereddit.com/r/bitcoinpuzzles/comments/boil0p/7_mbtc_quizchain2_block_5

  2. undated

    officialFormat: [word1 word2 word3 word4 word5]

    Sourcereddit.com/r/bitcoinpuzzles/comments/boil0p/7_mbtc_quizchain2_block_5

  3. undated

    officialOne space between words and no period at the end.

    Sourcereddit.com/r/bitcoinpuzzles/comments/boil0p/7_mbtc_quizchain2_block_5

  4. undated

    officialFirst three digits of MD5 hash: e7a

    Sourcereddit.com/r/bitcoinpuzzles/comments/boil0p/7_mbtc_quizchain2_block_5

ID@agntn/puzzlesv0.26.0MIT license

Public data about public puzzles. Balances come from the chains' explorers through the worker, cached for five minutes. Every key here was public before it landed in a record.