- A Bitcoin user lost 0.75 BTC (over $70,000) due to a mistake with Bitcoin’s Replace-by-Fee (RBF) system.
- The user made a series of mistakes while he was adjusting transaction fees, which caused the extra Bitcoin to be added to the transaction fee instead of being returned as change.
A Bitcoin User has accidentally lost 0.75 BTC, which is worth over $70,000, due to a mistake with Bitcoin’s replace-by-fee (RBF) system.
The incident, which happened on the 8th of April, has drawn so much attention to the huge cost of his mistake and how easily the error could have been avoided. This goes on to show the risk of manually adjusting transaction settings in crypto wallets.
Anmol Jain, a crypto forensics expert at AMLBot, explained that the user probably made a mistake with the fee settings while he was trying to replace their initial transaction. His first attempt had a low fee, but the second one increased the fee and changed the address. As he panicked to fix the first mistakes, he submitted another RBF with an unspent input of 0.75 BTC.
Instead of returning the extra BTC as change, it was mistakenly added to the transaction fee. Jain suggested that the user might have confused sats per byte with total sats or maybe he faced a wallet problem that led to the mistake.
The transaction, which was sent around midnight UTC on April 8, was the second attempt using RBF, and It sent 0.48 BTC with 0.2 BTC as change. As of the time of writing, the two attempts are still waiting to be confirmed, but they won’t be processed since the higher-fee RBF transaction replaced the second one.
The Risks involved with Bitcoin’s Replace-By-Fee (RBF) Feature
RBF, as a feature of Bitcoin, is often misunderstood and controversial. Bitcoin transactions are not final until they are added to a block and confirmed by more blocks in the chain; that’s what makes its name ‘Blockchain’. Transactions in the mempool depend on the bitcoin miners, who are motivated by profit, so they would likely process the transaction with the highest fee.
Since it’s hard to determine which transaction was sent first due to the decentralized nature of the network, the RBF feature was introduced so users could replace unconfirmed transactions by offering a higher fee.
In this case, the feature, meant to give users more control, led to a costly Bitcoin fee, turning a supposed simple process into an expensive mistake.
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