Image Credit: Reddit
Key Takeaways
- Adam Back called BIP-110 “technically defective,” arguing it would fail to stop the data embedding and spam techniques it targets while risking disruption to Miniscript-based applications.
- Back warned that without node, miner, and exchange alignment, the kind that made SegWit succeed in 2017, BIP-110 supporters would end up forking away from the main Bitcoin chain.
- The debate has surfaced unresolved governance questions about who has the authority to define which Bitcoin transactions are legitimate.
Blockstream CEO Adam Back has publicly rejected BIP-110, a proposed Bitcoin protocol change designed to filter spam transactions, calling it technically flawed and warning that it lacks the broad consensus required for activation. The pushback came after several Bitcoin figures publicly endorsed the proposal, deepening a community disagreement over transaction filtering on the Bitcoin network.
What BIP-110 Proposes
BIP-110 would introduce transaction filtering rules at the node level, with supporters framing it as a tool to limit data embedding and other uses of Bitcoin’s blockchain that they consider non-monetary spam.
Bitcoin veteran Fred Krueger backed the proposal, arguing Bitcoin should be reclaimed as an “activist-led network.” Software engineer Vinnie Bitcoins also endorsed it, saying the change could “make Bitcoin money again.”
Back’s Technical Objections
Back rejected both the framing and the mechanics. He described BIP-110 as “technically defective” and said it would not effectively stop the data embedding and spam techniques it targets. In his view, users could still exploit witness discounts and other transaction structures the proposal does not address, leaving its primary goal unmet.
Back also said BIP-110 could disrupt existing applications built on Miniscript, a Bitcoin scripting framework that allows developers to write and verify complex spending conditions.
On the question of activation, Back said the proposal’s chosen method is unlikely to succeed. Rather than gaining the ecosystem-wide support needed for a network upgrade, he predicted supporters would end up forking away from the main Bitcoin chain, creating a low-hashrate minority network while Bitcoin itself continues operating unchanged.
The Consensus Gap
Bitcoin advocate Daniel, writing on X, raised a more structural objection: most Bitcoin nodes do not currently enforce BIP-110 rules, which means miners have little economic incentive to signal support for it.
He compared BIP-110’s situation to SegWit, the 2017 protocol upgrade, arguing that SegWit succeeded because it secured simultaneous support from nodes, exchanges, and miners, which is a level of alignment he said BIP-110 has not approached.
Back agreed with that assessment. He argued Bitcoin is intentionally resistant to change, and that attempts to push through controversial upgrades without broad consensus have historically produced minority-chain forks that fail to gain lasting traction. He said failed forks showed that Bitcoin resists unauthorized changes, not that it is vulnerable to them.
Back Rejects Claims of Industry Bias Among Bitcoin Core Supporters
Adam Simecka argued that Bitcoin Core supporters have financial ties to the industry and that outsiders are more likely to back BIP-110. Back dismissed the claim, saying only a small group supports what he called a “broken filter proposal” and that the technical and economic stakeholders needed for adoption are not behind it. In a post on X, Back was more direct:
“BIP-110 restrictions are bypassable. The innovation damage is not. Bitcoin’s strength is its credible commitment to neutral, predictable rules. BIP-110 trades that, and Bitcoin’s upgrade future, for a spam filter that doesn’t even filter spam. That’s not a cleanup. That’s a downgrade.”
Commentator Alex Bergealex suggested much of the conflict is playing out on social media and does not reflect broader market concern about the proposal.
Governance Questions the Debate Leaves Open
Bitcoin commentator Fundamentals 40HPW offered a different objection, arguing that BIP-110 attempts to define which Bitcoin transactions are legitimate. In his view, that determination belongs to markets, not protocol gatekeepers. He acknowledged, however, that defeating BIP-110 would not resolve the underlying governance questions the debate has surfaced.
Back made a similar point, framing Bitcoin’s resistance to change as a feature rather than a flaw, while stopping short of claiming the spam question itself has an easy answer. No activation date for BIP-110 has been confirmed. The proposal remains in community discussion, with no indication it has secured the node, miner, or exchange support that would be required for a credible path to adoption.
