Bitcoin Core Developer Warns Users to Pause BTC Transfers When BIP-110 Deadline Nears

Atack posted the informing connected X connected June 29, 2026. He said helium plans to tally some a customized mentation of Bitcoin Core and Bitcoin Knots 110 broadside by broadside to ticker however the web behaves earlier the rules instrumentality effect.

A Temporary Soft Fork Targets Data successful Transactions

BIP-110 is simply a impermanent brushed fork connection aimed astatine what promoters telephone “spam.” It limits arbitrary information successful transactions, including ample OP_RETURN outputs and inscriptions.

New outputs would beryllium capped astatine 34 bytes, with OP_RETURN allowed up to 83 bytes. Data pushes and witnesser elements would beryllium capped astatine 256 bytes. UTXOs created earlier activation enactment exempt, and the regularisation expires automatically aft astir a year.

Signaling Remains Low arsenic the Deadline Approaches

Mandatory signaling begins astir artifact 961,632, projected for aboriginal August 2026. As of July 2, signaling sits astatine astir 0.76% successful the existent trouble period. Knots-based nodes marque up an estimated 8% to 22% of the network, depending connected the metric used, but miner hashpower backing the alteration has remained highly thin.

Image source: bip110.org/monitor

Bitcoin’s artifact tallness sits successful the mid-956,000s arsenic of July 2, putting the mandatory model astir 5,000 blocks away.

Why Reorg Risk Exists During the Window

Because BIP-110 enforcement runs done nodes alternatively than miners alone, a lag successful hash powerfulness could nutrient abbreviated reorgs, slower blocks connected the enforcing side, oregon mempool divergence erstwhile the mandatory signaling play starts. Luke Dashjr replied to Atack’s thread, arguing determination is nary reorg hazard for users who person already upgraded to BIP-110.

Other replies pushed back, questioning wherefore users should sideline funds astatine all, and immoderate called for progressive investigating oregon absorption alternatively of neutrality. “Fu** debar transacting. Need to beryllium putting ample OP_RETURN and Inscriptions successful each artifact for 144 blocks,” 1 X idiosyncratic wrote. It is precise apt that galore OP_RETURN and Inscription proponents volition bash conscionable that.

The Dual-Node Setup Explained

Atack’s program mirrors a method disposable to immoderate method user. Running a modular Bitcoin Core node alongside a Knots node with abstracted information directories lets an relation ticker some concatenation tips astatine once. When a miner produces a artifact that skips BIP-110 signaling, the Core node accepts it portion the Knots node rejects it, creating 2 unrecorded views of the concatenation connected 1 machine.

Operators tin way a imaginable concatenation divided utilizing modular RPC calls similar getblockchaininfo and getchaintips, comparing artifact heights, mempool contents, and rejected-block log entries betwixt the 2 nodes successful existent time.

Steps Users Can Take Before August

For holders who privation to trim vulnerability during the window, a fewer applicable steps basal out.

• Move funds disconnected exchanges into self-custody earlier the mandatory signaling play begins.
• Defer ample oregon time-sensitive transfers until confirmations stabilize aft the deadline.
• Wait for other confirmations, six to 10 alternatively of the accustomed 1 to three, if a transaction cannot wait. Exchanges and infrastructure providers whitethorn summation confirmation counts for deposits.
• If funds are connected an exchange, the relation whitethorn oregon whitethorn not admit a concatenation divided and the token that could transpire from it. It’s rather apt exchanges volition beryllium announcing preliminary plans for a concatenation divided anticipation earlier the deadline.

What Happens After Activation

If BIP-110 locks in, afloat data-limiting rules travel astir 2,016 blocks aft the mandatory signaling play ends, pushing afloat activation into mid-to-late August oregon aboriginal September. The regularisation past runs for astir a twelvemonth earlier expiring connected its own.

Atack characterized his presumption arsenic neutral, presenting the dual- node attack arsenic a means of reflection alternatively than a forecast of which concatenation volition yet prevail. Whether BIP-110 follows a akin people should statesman to look done signaling information implicit the coming weeks. It should beryllium noted that with the BIP-110 event, a concatenation divided remains lone a anticipation and is not wide expected.

By contrast, the August eCash fork is an intentional divided that volition nutrient 2 abstracted chains and 2 coins, though eCash volition beryllium recognized arsenic an alternate plus alternatively than BTC.