BTC BIP-110 signaling begins amid fork risk

TLDR

Mandatory signaling for Bitcoins BIP-110 soft fork has begun, raising a real but still uncertain risk of a minority fork and replay attacks if chains diverge.

1. BIP-110 is a reduced data soft fork now enforcing signaling from block 961,632, with miner support stuck around 2.6 percent and a four week decision window.
2. If a minority BIP-110 chain emerges, both chains initially share identical balances and transactions, creating replay-attack risk for holders who try to sell forked coins.
3. The key things to watch are signaling percentages, whether a minority chain actually sustains, and clear guidance from major wallets and exchanges before moving BTC.

Deep Dive

1. BIP-110 And Signaling

BIP-110 is a proposed Reduced Data Temporary Softfork that limits non-payment data, such as images and large files, in Bitcoin transactions for roughly one year to curb on chain spam and storage costs.BIP-110 explainer

Mandatory signaling for BIP-110 began at block 961,632, with BIP-110 nodes now rejecting blocks that do not carry the designated signaling bit.Mandatory signaling begins Miner signaling is reported near 2.6 percent, far below the 55 percent threshold needed for activation over a 2,016 block window.

This low support means BIP-110 enforcing nodes are intentionally stepping away from the chain built by most mining power, creating the conditions for a minority chain rather than an automatic upgrade.Less than 3 percent miner support

2. Fork Mechanics And Risks

If some miners continue producing BIP-110 compliant blocks while most hashpower ignores the proposal, two chains could briefly coexist: the dominant mainnet and a slower minority BIP-110 chain.Fork risk analysis

Early on, both chains accept identical transactions. That makes selling your free fork coins dangerous, because a buyer can replay that signed transaction on the main chain and spend the same BTC again.Replay attack warning

Replay protection is not built into BIP-110 until much later in the schedule, so several weeks could pass where the safest move for non-experts is to avoid moving BTC at all and wait for wallet or exchange tools that explicitly split balances.

3. What To Watch Next

The BIP-110 timeline has three important phases:

1. From block 961,632 into the mid 963,000s, BIP-110 nodes reject non-signaling blocks, testing whether a minority chain actually forms.
2. Lock-in (if it happens) is targeted around block 963,648, based on meeting signaling thresholds.Activation window details
3. Full rule activation and eventual replay protection are scheduled near block 965,664, roughly four weeks out.

Alongside block counts, watch miner signaling dashboards, public statements from large pools, and concrete instructions from leading wallets and exchanges. If signaling stays very low or minority blocks stall, the fork risk may fade without a lasting chain split.

Confidence: high, because multiple independent technical reports and trackers describe the same BIP-110 schedule and risks.

Conclusion

BIP-110s mandatory signaling period shifts Bitcoins fork risk from theory to a live governance experiment, with low miner support making a minority chain possible but not guaranteed. The main near term risk is not price, but replay attacks and operational confusion if a split briefly appears. Until tooling and guidance mature, the most important decisions for BTC holders involve when, or whether, to move coins during this window.