Introduction
BetterHash is a proposed alternative mining protocol designed to shift control from centralized mining pools back to individual miners. Unlike a hard fork, this protocol doesn't require changes to Bitcoin's consensus rules—it simply redefines how miners and pools interact. By enabling miners to construct their own blocks while pooling resources for steady payouts, BetterHash aims to mitigate risks like censorship, chain reorganization, and centralized decision-making.
The Flaws in Current Bitcoin Mining
Delegation-Agency Problem
Bitcoin mining pools act as intermediaries, wielding disproportionate influence over miners by:
- Constructing blocks: Pools decide which transactions to include/exclude.
- Dictating chain splits: Pools can redirect miners’ hashrate to competing forks.
- Representing miners: Pools signal support for upgrades without miner consent.
BetterHash resolves this by letting miners create their own block templates, reducing pools to profit-sharing coordinators.
Centralization Risks
- Few pool choices: Miners often face limited options, some with unfavorable terms.
- Opaque operations: Miners may unknowingly support actions against their interests.
- Attack vulnerabilities: Pools can be hacked or coerced into malicious activities.
How BetterHash Works
- Miners run full nodes, selecting transactions and building blocks locally.
- Blocks target pool addresses for payout distribution, while "shares" (failed attempts) prove participation.
- Pools lose block-creation control, becoming mere profit distributors.
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Problems Solved by BetterHash
1. Transaction Censorship
Scenario: Pools could blacklist transactions (e.g., an exchange’s wallet) under external pressure.
BetterHash fix: Miners independently include/exclude transactions.
2. Blockchain Reorgs via Bribes
Scenario: Pools might reorganize chains to erase transactions (e.g., post-exchange hack).
BetterHash fix: Miners control block construction, making reorgs impractical.
3. Artificial Fee Inflation
Scenario: Pools could fill blocks with private transactions, distorting fee markets.
BetterHash fix: Miners prioritize transactions based on personal criteria.
4. Unauthorized Chain Switching
Past incident: Pools redirected hashrate to alternate chains (e.g., Bitcoin Cash).
BetterHash fix: Miners choose which chain to support.
5. Dishonest Mining
Risk: Pools could secretly allocate hashrate against miners’ intent.
BetterHash fix: Transparent block creation by individual miners.
6. Political Signaling
Issue: Pools “vote” on upgrades without miner consensus.
BetterHash fix: Miners signal directly via their blocks.
Why Adoption Matters
BetterHash:
- Reduces centralization risks: No single entity controls block templates.
- Enhances security: Mitigates pool hacks and BGP hijacking threats.
- Empowers miners: Aligns incentives with network health.
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FAQs
Q1: Does BetterHash require a Bitcoin fork?
A: No—it’s a protocol layer change, not a consensus rule update.
Q2: How does BetterHash stabilize miner payouts?
A: Pools still aggregate hashrate but no longer control block contents.
Q3: Can miners switch pools easily under BetterHash?
A: Yes, with reduced lock-in since pools lose template control.
Q4: What’s the biggest barrier to adoption?
A: Incentivizing pools to relinquish power and miners to run nodes.
Q5: Has any pool implemented BetterHash?
A: Yes—Blockstream’s pool and Braiins’ Stratum V2 incorporate similar principles.
Conclusion
BetterHash addresses critical flaws in Bitcoin’s mining ecosystem by decentralizing block construction. While adoption hurdles exist, its benefits—censorship resistance, reduced attack surfaces, and miner autonomy—make it a vital evolution for Bitcoin’s long-term health.
Additional Resources:
- Matt Corallo’s BetterHash talk
- Braiins’ Stratum V2
- Blockstream’s Mining Launch