Bitcoin developer Olaoluwa Osuntokun on 2026-10-15 released a 103-page technical proposal called Layertree that seeks to make Bitcoin transactions more affordable at large scale. The design aggregates potentially millions of users into a single blockchain output while preserving individual control over funds. The concept, however, cannot operate today without changes to Bitcoin’s existing rules.
Bitcoin currently accounts for ownership through unspent transaction outputs (UTXOs), where each user’s coins occupy separate entries on-chain. Moving those coins consumes block space and incurs fees. Layertree inverts that model by consolidating many users into one on-chain output, aiming to spread costs across a far larger base without requiring custodial trust.
How would Layertree change Bitcoin’s on-chain footprint?
Layertree would compress the representation of user balances by placing potentially millions of participants under a single on-chain output, replacing today’s one-UTXO-per-user pattern. This reduces the number of outputs recorded directly on the Bitcoin blockchain and is intended to lower aggregate fees for large groups while maintaining self-custody.
Under Bitcoin’s prevailing UTXO structure, each spend updates a specific output set, and each user typically contributes their own entries to chain state. That design offers clarity and auditability but scales linearly with the number of participants, increasing demand for block space during busy periods. By flipping the arrangement, Layertree proposes shifting most state management off the base layer and anchoring it in a compact on-chain commitment, allowing many users to transact under a shared footprint. The key promise is that users would not need to relinquish control of their money to a third party to access these efficiencies.
Model | On-chain footprint | Custody | Status |
|---|
Current UTXO model | One output per user | Self-custody | Live today |
Layertree proposal | Single output for millions | Self-custody | Requires rule changes |
Why doesn’t Layertree work under current Bitcoin rules?
The proposal relies on capabilities that Bitcoin’s rule set does not yet permit, preventing deployment on the base layer today. Put simply, the chain lacks needed features to safely encode and enforce Layertree’s large-scale, single-output commitments under existing consensus constraints.
Osuntokun’s paper outlines the design at length but acknowledges the practical roadblock: without adjustments to Bitcoin’s rules, the approach cannot be realized on mainnet. Any pathway forward would therefore depend on securing broad technical consensus for changes that enable the construction and validation of the compact structures Layertree envisions. Until then, the model remains a blueprint for potential future scaling, not a drop-in production system.
What should Bitcoin users and developers watch next?
Stakeholders should watch for community discussion on what rule changes would be necessary and how they could be implemented without compromising security or self-custody. The 103-page release provides a starting point for review, benchmarking, and debate among wallet makers, node operators, and protocol researchers.
The publication sets the stage for technical vetting, test implementations, and comparison against today’s UTXO-driven economics. Key questions include how wallet software would integrate Layertree-style accounting, how exit guarantees would function at scale, and what trade-offs arise when compressing many users into a single on-chain output. With affordability and block space at a premium, the proposal is likely to receive close scrutiny from developers focused on scaling without sacrificing Bitcoin’s trust-minimized design.
Layertree’s core premise—self-custodial aggregation under one output—targets the long-standing tension between decentralization and throughput. Whether the required rule changes can achieve consensus will determine if this blueprint transitions from theory to practice.
Layertree — Official Project Website and Technical Paper
Bitcoin Improvement Proposals (BIPs) — Official Proposal Archive
BIP 3 — Bitcoin Improvement Proposal Process
Olaoluwa Osuntokun — Official GitHub Profile
Mastering the Lightning Network — Technical Reference
