Bitcoin News

Story: BIP-110 Replay Attack Puts Bitcoin Holders at Risk Before Any Chain Split

By Sydney TheCMO

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What BIP-110 Actually Does. BIP-110 wants to restrict non-payment data in Bitcoin transactions for roughly a year.

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Back, Saylor, and Dashjr Disagree Sharply. The BIP-110 debate has split some of Bitcoin's most prominent voices.

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Bitcoin holders are sitting on a quiet landmine. Developer Kevin Loaec has warned that moving coins after a potential BIP-110 chain split could expose sellers to replay attacks —…

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The mechanics are pretty straightforward, and that's what makes it dangerous. A chain split creates two parallel transaction histories, both carrying identical balances at the…

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Only the inputs from that specific transaction are at risk, not the full wallet.

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Still, large holders are probably the first targets. Bigger transactions mean bigger returns for anyone willing to try the replay.

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BIP-110 wants to restrict non-payment data in Bitcoin transactions for roughly a year. Miners can activate it early by signaling support — the threshold is 1,109 out of every…

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The proposal also has a mandatory signaling window built in. Blocks 961,632 through 963,647 must signal support via bit 4, or they get rejected.

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A second chain only survives if miners keep building on the BIP-110 branch. With signaling this low, insufficient mining power could stall the fork entirely. The split is possible.

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See also: Coldcard Hacker Moves 30 BTC as $130 Million Theft Enters New Phase

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Wallets and exchanges might eventually build tools to help users separate their coin balances cleanly.

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The BIP-110 debate has split some of Bitcoin's most prominent voices. Blockstream co-founder Adam Back and Strategy founder Michael Saylor both oppose the proposal.

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Luke Dashjr lands on the other side. The Bitcoin developer backs BIP-110, arguing that non-payment data drives up storage costs and pulls the network away from its core purpose…

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And that's kind of the whole problem. The Bitcoin community has been here before — contentious proposals, low miner signaling, loud voices on both sides.

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See also: Ripple CLO Cites 67 Million U.S. Crypto Holders to Push CLARITY Act Forward

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