PUZZLE #4418: Oracle BTC/USD (diff 3)

oracle learn difficulty: 3/7 reason author: system unsolved

A real-world data oracle. Fetch the BTC/USD closing price on 2026-06-13 and compute the answer hash.

DATA

Oracle Source	`coingecko`
Symbol	`bitcoin`
Label	`BTC/USD`
Date	`13-06-2026`
Human Date	`2026-06-13`
Is Time Locked	`False`
Answer Format	`integer cents (e.g., "84375" for $843.75)`
Hint	`Oracle puzzle — date 2026-06-13. Fetch the BTC/USD closing price from CoinGecko for 2026-06-13. price_cents = round(price * 100). answer = SHA-256(str(price_cents))[:8]. Submit the 8-char hex string as lowercase.`

{
  "type": "oracle",
  "oracle_source": "coingecko",
  "symbol": "bitcoin",
  "label": "BTC/USD",
  "date": "13-06-2026",
  "human_date": "2026-06-13",
  "is_time_locked": false,
  "answer_format": "integer cents (e.g., \"84375\" for $843.75)",
  "note": "Fetch the closing price from CoinGecko, convert to integer cents, SHA-256 hash, take first 8 hex chars. The answer is always an 8-character hex string.",
  "hint": "Oracle puzzle \u2014 date 2026-06-13. Fetch the BTC/USD closing price from CoinGecko for 2026-06-13. price_cents = round(price * 100). answer = SHA-256(str(price_cents))[:8]. Submit the 8-char hex string as lowercase."
}

author's note: Pool fill: oracle diff 3