MEVA and aPriori

The prerequisite for any healthy market is regulation. Financial regulation allows for seamless capital exchange, antitrust laws control rent seeking, and IP laws encourage innovation. On blockchains, since everything is code, those who build the code build the laws.

This power is especially prevalent when looking at the very bottom of the blockchain stack: blockbuilders. The stakeholders that compete to build blocks make or break the blockchain itself; if block production stalls or incentives encourage predatory behavior, the integrity of the chain crumbles and users disappear. For example, when Solana faced an outage , users were unable to perform any transactions, meaning they could not deposit or withdraw tokens.

Blockbuilders are those that physically take transactions out of a mempool and build transaction blocks that they then propagate to other blocks to reach consensus for the state of the blockchain. The design of how the stakeholders in the block building process interact with each other depends on companies that build these systems. On Ethereum, Flashbots (a Pantera portfolio company) is the go-to. On Solana, Jito is king. And when Monad launches, aPriori will dominate.

MEVA

The umbrella term that is used to describe the problems these companies seek to solve is “MEV” or “maximal extractable value”. In a nutshell, the individuals that order these blocks into transactions are incentivized to order them to maximize the fees they generate, which means they might reorder transactions maliciously to maximize their own profits and increase costs for users.

The design goals that Miner Extractable Value Auction Infrastructure (MEVA) aim to solve are gas fee stability, competition, and concentration. Most of this boils down to incentives; if the stakeholders are financially compensated for adding positive externalities (or removing negative externalities) to block building, then they will do so. However, there is no perfect harmony.

On Ethereum, where block times are around 12 seconds , all stakeholders have the time to access all transactions and simulate all of them in order to maximize their profits. With this in mind, the current gold standard approach on Ethereum is Proposer-Builder Separation (PBS). This setup separates the process into 5 stakeholders: users, block producers, relays, block proposers, and searchers. By separating the block welfare value with multiple stakeholders, they are all incentivized to share information with each other, which allows for competitive block building, while ensuring blocks stay profitable (which minimizes failed transactions ). This has its own issues though; block producers have become centralized with the top two builders capturing more than half of the value from block building. Apps have also realized that they can capture their own MEV through mechanisms like MEV taxes , allowing them to participate in the transaction ordering process and reclaim value that would otherwise go to block proposers.?

Monad

Monad is an upcoming new chain that will be the most performant EVM-Compatible layer 1 blockchain ever, with 10,000 transactions per second, 1-second block times, single-slot finality, and low-hardware requirements. One of the innovations that makes this possible is separating the execution and consensus layer, which allows the current block to run its consensus while the previous block is executed. Monad Labs raised $225 million and are poised to be the next big L1, having already amassed more than 300k followers on Twitter.

This brings up three design challenges:

1. Indeterminism in state:

• Since execution of the previous block does not complete before consensus of the next one, there is no “current” state.?

1. Limited time window to simulate full blocks:?

• The indeterminate state and the 1 second block time means block builders may not have the time to simulate full blocks of transactions and order them to optimize for profits.

1. Execution uncertainty:

• The probabilistic nature of transaction ordering means the current architecture may lead to bundles of transactions reverting on-chain, causing higher failed transaction rates which hurt users.

Solving these means designing an architecture that is cheap and has a low transaction failure rate for users, while ensuring that the stakeholders in block building remain profitable.

Team

The founding team is uniquely positioned to be successful:

• Ray, CEO/Co-Founder, Prev Special Projects at Jump Crypto, Contributor at Pyth Network, Quant Trader at Flow Traders
• Olivia, CTO, Prev Senior Engineer at Coinbase, Investments at Bridgewater
• Ed, Research, prev Data Scientist at VCRED, Project Leader at Los Alamos National Labs

The rest of the team has backgrounds in high frequency trading, quantitative hedge funds, and other top crypto companies.

Liquid Staking

aPriori plans to take advantage of the infrastructure they’ve built to launch liquid staking onto those that run their MEVA. Jito does just this, allowing users to stake SOL and earn some of the rewards that the validators that use Jito earn. Jito has a Fully Diluted Value (FDV) of $2 billion and monthly revenues of over 800k .

Testnet Launch

When the Monad testnet goes live and some final integrations, aPriori will launch the liquid staking protocol on Monad testnet. aPriori is also planning to release an initial version of MEVA system during Monad testnet, focusing on:

• onboarding searchers and block builders to access the block space auction,
• facilitating validator experimentation and stress testing client software.

Designing MEVA is a fundamental part of the inner plumbing of any blockchain. Monad’s hyper parallelized EVM L1 is a new ecosystem and requires constant innovation to ensure a positive user experience and profitable blockbuilders. The team has the experience, drive, and vision to continue doing so.

During this testnet phase, the team invites all parties to participate in testing and provide feedback as they work towards mainnet readiness and further roadmap items like sandwich protection rpcs and an analytics dashboard.

To read more about aPriori’s design thinking, check out this article. To read more about MEVA on Ethereum, read Flashbots’ research here .

- Paul Veradittakit