# Bitcoin Nodes Begin Rejecting Non-Signaling Blocks This Weekend Under BIP-110

A developer warns that selling coins on any minority chain could let buyers replay the same transaction on Bitcoin, so holders who make no transactions face the least risk.

- Published: 2026-08-08T05:55:47.567Z
- Canonical: https://polylog.news/crypto/2026-08-08/bitcoin-nodes-begin-rejecting-non-signaling-blocks-this-week
- Publisher: Polylog (Crypto desk)
- Section: crypto
- Sources: [CoinDesk](https://www.coindesk.com/tech/2026/08/08/bitcoin-holders-risk-losing-real-btc-if-they-sell-coins-from-bip-110-fork-says-developer), [CryptoSlate](https://cryptoslate.com/bitcoin-has-185-blocks-left-before-bip-110-rules-begin-rejecting-blocks/), [Bitcoin Magazine](https://bitcoinmagazine.com/technical/bitcoins-bip110-moment-three-possible-scenarios)

At block height 961,632, expected on or about August 9, nodes that enforce Bitcoin Improvement Proposal 110 (BIP-110) will start rejecting blocks that do not signal support for the rule change. CryptoSlate [counted 185 blocks remaining](https://cryptoslate.com/bitcoin-has-185-blocks-left-before-bip-110-rules-begin-rejecting-blocks/) on Thursday evening. BIP-110, formally the Reduced Data Temporary Softfork, [caps the arbitrary data a transaction may carry](https://www.simplemining.io/insights/post/bip-110), holding most new outputs to 34 bytes, OP_RETURN to 83 bytes and individual data pushes to 256 bytes. Its activation design is what makes this weekend consequential: the proposal uses a 55 percent miner-signaling threshold rather than the roughly 95 percent supermajority earlier soft forks required, so a minority of hashrate can produce blocks that enforcing nodes discard.

The immediate financial risk is not the data limit. It is replay. A Bitcoin transaction signed on one chain remains valid on any chain that shares the same history and the same signature rules. If a separate chain appears without replay protection, a holder who sells fork coins hands the buyer a signed message that can also move the corresponding coins on Bitcoin. CoinDesk reports a developer's warning that holders who [sell coins from a BIP-110 fork risk losing real bitcoin](https://www.coindesk.com/tech/2026/08/08/bitcoin-holders-risk-losing-real-btc-if-they-sell-coins-from-bip-110-fork-says-developer), and that doing nothing is the conservative course until the two ledgers can be cleanly separated.

Bitcoin Magazine describes [three possible outcomes](https://bitcoinmagazine.com/technical/bitcoins-bip110-moment-three-possible-scenarios): signaling clears the threshold and the rules lock in, signaling fails and the proposal expires, or enough miners keep producing non-signaling blocks that two chains persist. Miner economics decide which one happens. A chain that a large share of economic nodes will not accept produces coins that exchanges may refuse to credit, which in turn determines whether mining it pays.

The deeper argument is about who authorizes a change to Bitcoin's rules. BIP-110 emerged from a dispute over transactions that use the ledger to store non-monetary data, and its low activation threshold is a deliberate departure from the caution that followed the 2017 activation dispute. Whatever happens at 961,632, the precedent set by a minority-threshold soft fork will shape the far larger migration already queued behind it, the move to post-quantum signatures.

## What this means

Replay is the transmission channel. It converts a governance dispute into direct loss for anyone who signs a transaction while two chains share the same rules. Exchanges and custodians are exposed first, because they must decide whether to halt deposits and withdrawals, whether to credit fork coins, and how to split balances without moving customer keys. Miners face the opposite calculation, since hashrate pointed at a chain the largest venues will not list earns coins that cannot easily be sold. The two outcomes are a brief signaling period that resolves within days and leaves one chain, or a persistent minority chain that forces every custodian to build splitting tools it does not currently run.

## What to watch

- The share of blocks signaling for BIP-110 once the mandatory window opens, because sustained non-signaling hashrate is the only path to a lasting second chain.
- Whether large exchanges publish deposit and withdrawal suspensions or fork-coin crediting policies, which reveals what their own risk desks expect.
- Whether any minority chain adds replay protection, since that single change decides whether selling fork coins is safe or destroys the holder's bitcoin.