Panicked Bitcoiner Loses Over $70K in RBF Fee Error!

Yigit Taha OZTURK — Tue, 08 Apr 2025 12:00:20 +0000

Shortly after midnight UTC on April 8, a Bitcoin user mistakenly paid 0.75 BTC ($70,500) in transaction fees due to a panic-driven use of replace-by-fee (RBF). The transaction was the user’s second attempt to push a prior transaction through by raising the fee and changing the destination address. In the final version, a newly added unspent transaction output (UTXO) ended up being included fully in the fee.

The initial transaction used a “default or conservative” fee setting. The user’s first RBF attempt doubled the fee and altered the output address. But instead of confirming either of these transactions, a final RBF with a dramatically higher fee overrode them, causing the entire amount of the change — 0.75 BTC — to be included as miner reward.

Satoshi Error or Bug in Wallet Script?

According to Anmol Jain, VP of Investigations at AMLBot, the user may have made a simple yet costly mistake in fee calculation. Jain suggested the user likely meant to enter 30.5692 sat, but accidentally typed 305,692 sat — or confused sat/vB with total satoshis.

Another theory is that an automated wallet script contained a miscalculation. Some wallets allow fee settings in sats/vB, and such confusion can arise if the system interprets a small value as too low and prompts the user to increase it. Jain explains:

“User types 305000 thinking it’s 30.5 sat/vB, but the wallet applies 305,000 sat/vB — which is insane.”

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The mistake caused the wallet to treat a full UTXO of nearly 0.75 BTC as a transaction fee, likely due to not properly updating the change address or misreading the transaction structure. Both earlier transactions remained unconfirmed while the highest-fee version went through.

RBF: Flexible Feature or Dangerous Tool?

Replace-by-fee is a controversial but core feature in Bitcoin. It allows users to replace unconfirmed transactions with higher-fee versions. Miners, motivated by profit, are expected to confirm the version that offers a higher reward.

This mechanism has sparked debate. In 2019, Bitcoin Cash advocate Hayden Otto claimed RBF enabled double-spending. Bitcoin Cash removed RBF support and claimed unconfirmed transactions on its network were final and trustworthy.

Despite this, RBF-like behaviors have occurred on Bitcoin Cash as well, showing that this feature is more a result of blockchain dynamics than a standalone switch.

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Bitcoin Transaction Fees Increase by 937.7%

Tanju Akbıyık — Sat, 24 Aug 2024 09:00:55 +0000

On August 22, Bitcoin transaction fees increased by a staggering 937.7% as Network Activity Increased, jumping from $0.74 per transaction to $7,679. This sharp increase was due to increased network activity, which led to higher costs for users making BTC transactions.

Increased Network Activity Also Reflects in Bitcoin Transaction Fees

In recent months, Bitcoin transaction fees have generally remained stable at under $2. On August 18, fees reached a significant drop of $0.558. While these lower fees benefit users in general by making transactions more affordable, they can also reduce the income of miners who rely on transaction fees to process transactions on the blockchain.

An Example of Extraordinary Fees Amid High Demand The recent fee increase was highlighted by an incident reported by a Bitcoin developer named Mononaut. During this period of high demand, one user paid 0.5 BTC in transaction fees to consolidate 0.55 BTC, highlighting the extreme congestion on the Bitcoin network.

Return to Normal Bitcoin Fee Levels

By August 23, Bitcoin transaction fees had dropped significantly to $0.34, according to data from the mempool. This rapid decline suggests that the increase was temporary and fees are returning to more normal levels.

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Data from analytics firm CryptoQuant shows a decline in Bitcoin demand, with 30-day growth falling from 496,000 BTC in April to a current negative 25,000 BTC.

This decline in demand is partly due to a decline in purchases by spot Bitcoin exchange-traded funds (ETFs) in the US, which fell from 12,000 BTC in March to an average of 1,300 BTC between August 11-17. Future Opportunities for Bitcoin Miners Looking ahead, investment firm VanEck predicts that Bitcoin miners could earn an additional $13.9 billion annually by 2027 if they start providing energy services to industries like artificial intelligence (AI) and high-performance computing (HPC). This shift could open up a new revenue stream for miners, expanding their income beyond traditional transaction fees and block rewards.

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