BIP-110 Begins Mandatory Signaling on Bitcoin
Bitcoin’s BIP-110 entered mandatory signaling at block 961,632, with miners signaling in 51 of the prior 2,016 blocks (2.53%), below the 55% early activation threshold, according to a BIP-110 monitor. Enforcing nodes began rejecting blocks without version bit 4. The proposal would temporarily restrict transaction data sizes for about a year, with critics including Michael Saylor and Adam Back.
How this was made
The 30-second read
Why it matters
The article reports the start of the mandatory-signaling window and the low miner support rate, implying enforcing nodes will reject non-signaling blocks, which can create short-term divergence risk and increase uncertainty about transaction validity and blockspace usage.
Market read
Traders may need to reassess short-term Bitcoin risk premia as enforcing nodes begin rejecting non-signaling blocks with only 2.53% miner support.
What to watch
Market impact may depend more on exchange policy, wallet/node upgrade adoption, and whether the proposed one-year restrictions actually gain broader enforcement beyond the signaling window.
Background
BIP-110 is a Bitcoin Improvement Proposal that would impose temporary consensus restrictions (script size, OP_RETURN caps, witness/data limits, and some Taproot feature limits) for about one year, using version bit 4 for miner signaling.
Ticker impact
BIP-110 enters mandatory signaling at block 961,632, with only 2.53% miner support, and enforcing nodes reject non-signaling blocks.
Higher volatility risk around the signaling window and any fallback/proof-of-work contingency discussion.
The article provides concrete activation mechanics (version bit 4, rejection by enforcing nodes) and a low miner support rate, which can amplify uncertainty even without a confirmed hard fork.
Market effects
Could intensify the broader “spam wars” debate by constraining data/inscriptions, affecting expectations for on-chain activity and fee dynamics.
Limited direct regional linkage; impacts are global for Bitcoin network participants.
Consensus-change uncertainty can spill into crypto risk sentiment and derivatives positioning across major venues.
Counterpoint
Low miner signaling may prevent any sustained rival chain, limiting real-world disruption beyond temporary enforcement divergence.
Key entities
- crypto_networkBitcoin
The protocol whose nodes enforce BIP-110 and reject blocks that do not set version bit 4 during the mandatory-signaling window.
- protocol_changeBIP-110
A proposed Bitcoin consensus change that would temporarily limit transaction data and certain Taproot features.
- developerChris Guida
Bitcoin developer who rebased preliminary proof-of-work change code as a contingency if miners oppose BIP-110.
- industry_executiveMichael Saylor
Critic of BIP-110, arguing it could divide Bitcoin and cause nodes to reject transactions permitted under current rules.
- industry_executiveAdam Back
Blockstream CEO and critic of BIP-110, raising concerns about network division and transaction rejection.
