Miner Extractable Value in Ordinals and Runes

Miners reorder transactions within a block to claim rare satoshis (e.g., first sat of a block, halving sats) from exchange withdrawals or unsuspecting users.

Exchanges, Custodians, High-Value Collectors

Loss of high-value assets during withdrawal; undermines trust in exchange execution quality.

Use coin selection that avoids rare satoshis; batch withdrawals in a single transaction; monitor for miner reordering.

Miners observe a pending Rune mint transaction in the mempool and insert their own mint transaction at the start of the block to claim the limited-supply asset first.

Rune Protocol Teams, Minters, Marketplaces

Fair launch guarantees are broken; minters are crowded out; protocol distribution becomes centralized among mining pools.

Implement commit-reveal minting schemes; design mints with large block windows; monitor mempool for front-running patterns.

Miners reorder the reveal transaction of a two-stage (commit-reveal) inscription to claim a coveted low inscription number or a rare satoshi for themselves.

Inscription Services, Collectors, Marketplace Indexers

Loss of expected inscription provenance; undermines the value proposition of low-numbered or rare-sat collections.

Use a single-transaction reveal when possible; monitor for unexpected reordering of reveal transactions by mining pools.

A miner artificially inflates the fee rate of their own transaction to displace others from the next block template, capturing a time-sensitive MEV opportunity.

All Transactors, Wallet Fee Estimators

Users overpay for inclusion or experience unexpected delays; fee estimation algorithms are gamed.

Use robust fee estimation that accounts for mempool churn; avoid time-critical transactions that are vulnerable to displacement.

A pool finds a valid block containing a high-value MEV opportunity but withholds it to re-mine a block that captures the value for themselves.

Mining Pool Participants, Network Security

Increased orphan rate; centralization pressure as pools with more hashpower can take this risk; undermines pool participant revenue.

Monitor for anomalous orphan rates; diversify hashpower across multiple pools; use pools with transparent block template policies.

Miners observe a large, pending Rune transfer and insert a transaction to front-run a decentralized exchange trade or liquidate a position.

Rune DEXs, Lending Protocols, Market Makers

Toxic flow for liquidity providers; unfair liquidations; loss of user funds on protocols that rely on mempool-visible state.

Use off-chain order books with batched settlement; implement slippage protection; avoid revealing critical state in the mempool.

A user pays a miner directly (out-of-band) to include a specific transaction ordering or to exclude a competitor's transaction, bypassing the public fee market.

All Network Users, Protocol Designers

Erodes the neutrality and transparency of the fee market; creates an uneven playing field favoring sophisticated actors.

Advocate for and adopt protocols that minimize the value of transaction ordering; monitor for anomalous transaction inclusion patterns.

Miners reorder transactions within a block to claim rare satoshis (e.g., first sat of a halving block) for themselves before a collector's transaction is confirmed.

High

Collectors should use private mempool submission services. Pools should adopt transparent transaction-ordering policies. Chainscore can review fair-ordering commitments.

A miner or pool observes a pending rune mint transaction in the mempool and inserts their own mint transaction ahead of it, capturing the limited-supply asset at a lower commitment height.

High

Minters should use commit-reveal schemes where possible. Wallets should obscure mint transactions via out-of-band relay. Chainscore can design front-running-resistant mint flows.

A miner reorders transactions to place their own inscription reveal immediately before a competing reveal, capturing a coveted low inscription number or collection index.

Medium

Marketplaces should not rely on inscription number as a sole rarity signal. Creators should batch reveals. Chainscore can audit rarity dependencies in marketplace logic.

Pools with advanced MEV extraction capabilities attract more hashrate, increasing their block share and ability to execute more sophisticated multi-block extraction strategies.

High

Hashers should diversify pool selection. Protocol teams should monitor pool concentration. Chainscore provides hashrate centralization risk modeling and pool behavior monitoring.

A miner replaces a high-fee inscription transaction with their own, extracting the fee while censoring the original content. This degrades fee-market reliability.

Medium

Wallets should use opt-in RBF carefully. Indexers should flag replaced transactions. Chainscore can review fee-market manipulation detection systems.

A miner extracts value across both Runes and Ordinals in a single block, e.g., minting a rune and inscribing a rare sat in the same block to create a bundled collectible.

Medium

Marketplaces should monitor for miner-created bundles sold as organic. Collectors should verify block construction history. Chainscore offers cross-asset MEV pattern detection.

Mining pools monitor the mempool for large or high-value inscription reveals and sell order-flow data to third parties, enabling front-running on secondary markets.

Medium

High-value traders should use private transaction submission. Marketplaces should implement time-locked reveals. Chainscore can assess mempool privacy risks for trading operations.

A large pool withholds blocks or strategically times block publication to win rune commitment races, manipulating the apparent randomness of block discovery.

Low

Rune protocol designers should avoid commitment schemes that rely on block timing. Chainscore can review commitment mechanism fairness under adversarial mining conditions.