Defending funds on ColdCard with RBF transactions

stackernews-rbf-rescue-experiment

Organisation: Stacker News
Evidence role: Community discussion
Published: 2026-08-05
Source changes: 0
Detected differences: 0
Unreviewed: 0
Copies held: 1

ignaciob relaying an alleged Pathfinder COLDCARD Mk3 test in which WatchGuard detected a sweep and raced it with a pre-signed replace-by-fee transaction, naming a transaction and fee amounts. This is a distinct mitigation experiment and public discussion of an adversarial fee race during the rescue window. The experiment, its outcome and the claim that the later attacker transaction continued the race are the thread's and linked post's claims, not verified here. Captured through the site's public GraphQL API: the rendered pages crash the capture tab, and the API answers POST from this host. The query fixes the captured surface to the item's title, text and two levels of comments, each with author and absolute timestamp.

Every check is recorded, including checks that found no text change. A detected edit is therefore bounded between two checks. The publisher's exact save time is not observable from this record. Last checked 12 Aug 2026, 23:57 UTC.

Earliest copy held Current

seen 6 Aug 2026, 10:08 UTC · Captured here 1,809 chars

What changed from the previous capture 0 lines

Extracted text as captured

{
  "data": {
    "item": {
      "comments": {
        "comments": [
          {
            "createdAt": "2026-08-05T22:06:21.091Z",
            "text": "They went for 10k sats? Wow.",
            "user": {
              "name": "siggy47"
            }
          },
          {
            "createdAt": "2026-08-05T22:28:30.476Z",
            "text": "Impressive",
            "user": {
              "name": "MB"
            }
          },
          {
            "createdAt": "2026-08-05T21:46:00.596Z",
            "text": "https://twiiit.com/we_satoshis/status/2085034468935450918",
            "user": {
              "name": "nitter"
            }
          }
        ]
      },
      "createdAt": "2026-08-05T21:45:21.911Z",
      "text": "So, this guys had a device that sound an alarm if any cold btc are moved, giving them time to fight with sats. \nAt the end of the day it is a sats battle to keep the funds.\n\nhttps://x.com/we_satoshis/status/2085034468935450918\n\nWe hosted 10,000 sats on a [@Pathfinder)  Coldcard MK3, waiting for an attacker to attempt a sweep. The attacker struck just 10 seconds after the deposit.\n\nWatchGuard (@we_satoshis hardware ) detected the sweep attempt and raced the attacker in real time using a pre-signed Replace-by-Fee (RBF) transaction. \n\nThe defense was successful—the RBF transaction won the race, using a fee of 9,000 sats to secure the funds\n\n. [https://mempool.space/tx/cf6992a9fc4d1f3fdea47ae451b13a92f71e4291f01f36b54db630aafa88dd0e]\n but the attacker strike again with 9100 sats fee  .... This race can continue until every last satoshi is burned in mining fees instead of ending up in the hacker's wallet...",
      "title": "Defending funds on ColdCard with RBF transactions",
      "user": {
        "name": "ignaciob"
      }
    }
  }
}

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