Bitcoin Client Proposal Would Lift Transaction Cap to 3.9M Weight Units

Bitcoin News

Bitcoin Ordinals advocate Leonidas has proposed a new open-source Bitcoin client that would raise the maximum individual transaction size to 3.9 million weight units, nearly ten times the 400,000-weight-unit ceiling enforced by Bitcoin Core's default relay policy. Announced in a post on X on Friday and named Bitcoin $DOG Mode, the software would also cut the dust limit — the smallest economically spendable output a node will relay — to a single satoshi from the current 294 to 546 satoshi range. Leonidas framed the client as a way to remove restrictions that live in node policy rather than in Bitcoin consensus rules themselves.

The distinction Leonidas is drawing matters more than the numbers. Consensus rules define what the network will accept as valid; relay policy defines what individual node operators choose to forward. A transaction can satisfy every consensus rule and still never reach a miner because default policy in the two dominant clients, Bitcoin Core and Bitcoin Knots, refuses to propagate it. In his statement, Leonidas said those clients have spent years enforcing rules that Bitcoin itself does not have, adding that the $DOG Army is done asking for permission. The proposed client does not fork consensus — it simply declines to apply the extra filters.

The higher weight ceiling has a direct practical effect on inscriptions. At 3.9 million weight units, an Ordinals user could commit a large media file, or an entire collection, inside one transaction that occupies most of a block rather than splitting the payload across many. Ordinals inscriptions and Runes have been described as Bitcoin's take on non-fungible and fungible tokens respectively, and both remain contentious among Bitcoin users who characterize the data as spam consuming block space that would otherwise carry monetary transfers. The proposal does not address that objection so much as sidestep it, leaving the decision to node operators.

The dust-limit change targets a different friction point. Under current defaults, users creating very small outputs must pad them with extra satoshis to clear the 294-to-546 threshold before a standard node will broadcast the transaction. Dropping the floor to 1 satoshi removes that padding requirement entirely, making micro-outputs cheaper to construct and easier to move. Whether that is an improvement depends on which side of the debate a user sits on: opponents argue a 1-satoshi floor invites unspendable UTXO bloat that every full node must carry indefinitely, while Ordinals users see it as removing an arbitrary tax on legitimate asset transfers.

Bitcoin $DOG Mode would enter a client market that currently has only two meaningful participants. Bitcoin Core and Bitcoin Knots together run the overwhelming majority of reachable nodes, and any third implementation faces the practical hurdle of convincing operators to switch software that secures real value. Leonidas has been explicit about the strategy: the goal is not to displace Core outright but to attract enough users that Core's maintainers eventually reconsider their own policy defaults. That is a pressure campaign conducted through node counts rather than through the BIP process, and its success is measurable only after the fact.

The proposal arrives months after Ord.io, the Ordinals platform Leonidas operated, shut down, and it continues a broader push for wider support of Bitcoin-native digital assets. The timing places it against a backdrop where prominent Bitcoin figures including Michael Saylor and Adam Back have publicly opposed the BIP-110 Ordinals proposal, signalling that the policy fight over what belongs in Bitcoin blocks is nowhere near settled. No launch date, code repository or node-count target has been disclosed for $DOG Mode as of publication, and the proposal remains an announcement rather than shipped software — a distinction worth holding onto.

As of 08:00 UTC, Bitcoin trades at $62,830, down 2.04% over 24 hours, with the policy debate having no visible price impact. COINOTAG's proprietary 42-indicator composite S/R scoring engine rates the $63,754 resistance at 86/100 — our strongest reading on the board — driven by the confluence of a support-to-resistance flip, the EMA 20 and the Ichimoku Tenkan. Immediate support at $62,927 scores 78/100 on a resistance-to-support flip and the volume point of control, meaning spot is sitting fractionally below a level it needs to reclaim. Our derivatives aggregate shows funding at -0.0015%, $12.48 billion in open interest and a 1.92 long/short account ratio — crowded longs paying to stay in, against a Fear and Greed reading of 27. Losing $61,556 opens $57,800 and invalidates any recovery thesis.