Bitcoin’s BIP 110 fork deadline nears with miner support at zero
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A contentious proposal in the Bitcoin community, known as BIP-110 or the Reduced Data Temporary Soft Fork, is approaching a critical deadline in early August 2026. The proposal aims to temporarily restrict non-financial data embedded in Bitcoin transactions by limiting the size of OP_RETURN fields and blocking larger arbitrary data chunks above 256 bytes for one year. Supporters argue this would reduce the burden on nodes and refocus Bitcoin exclusively on payment transactions. However, critics contend that the proposal improperly censors legitimate, fee-paying transactions by turning a policy debate over spam into a consensus rule, potentially setting a dangerous precedent.
Despite significant social media discussion, prominent figures such as Michael Saylor and Adam Back have publicly opposed BIP-110, emphasizing that the issue of spam should not justify consensus changes that invalidate currently valid transactions. Both highlight that any real alternative lies in forking the network if enough participants disagree, but the existing Bitcoin network is unlikely to adopt this change. Miner support for BIP-110 remains negligible, never rising above 1% and currently at zero, while node adoption is limited to low single digits, primarily from users of the alternative Bitcoin Knots software rather than the dominant Bitcoin Core client.
The proposal is structured as a user-activated soft fork (UASF) with a low 55% miner-signaling threshold instead of the traditional 95%, but the absence of miner backing and sparse node adoption suggest it will fail to achieve consensus. The signaling period ends soon, with a voluntary lock-in deadline expected in early August, followed by potential activation in September. Given the minimal support, BIP-110 is more likely to cause a minority chain fork rather than a network-wide upgrade, reflecting the strong decentralized resistance to changes that are not widely agreed upon.
Though concerns about non-financial data inflating Bitcoin blocks are valid and have increased since a protocol change in October, the Bitcoin community’s resistance indicates that any rules limiting data must have overwhelming consensus. The BIP-110 episode underscores Bitcoin’s decentralized governance model where thousands of independent operators determine network changes. As it stands, the Bitcoin network is poised to maintain its current inclusive policy on transaction data, upholding its principle of validating any properly formed and fee-paying transaction.