Proposer/Builder Separation

Block Building for Everyone

The migration from Proof-of-Work to Proof-of-Stake separates two critical Ethereum infrastructure roles—block building and block proposing—in what is known as Proposer/Builder Separation (PBS). Under PBS, anyone in the network can now actively participate in the act of block building and make money.

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Why should you be
a block builder?

Decentralization is critical at every level of the Ethereum network - including block building. By contributing blocks and connecting to trusted, open-source relays you are helping secure the network, increase the diversity of transactions included, and ensure a reliable ecosystem.

Network Security

Become a block builder to strengthen the robustness and decentralization of Ethereum by increasing the diversity of block builders.

Dynamic Inclusion

Decide what transactions are added to the blockchain based on your values. Align behind trusted, reliable, transparent relays that align to your point of view.

Active Participation

Be an integral part of the PoS Ethereum ecosystem by enabling Proposer/Builder Separation. Reliably send blocks and payloads to keep the ecosystem running and decentralized.

Requirements for profitable block building

Based on Blocknative’s state-of-art Transaction Orchestration Platform consisting of gas prediction, transaction simulation, mempool products, and Blocknative relay, anyone can be a block builder using Blocknative’s Block Building Toolkit.

Largest basket of transactions

Blocknative runs multiple nodes in multiple geographies giving you a comprehensive, low latency, census-level view of pending transactions. With the best view of the mempool you can include the most profitable transactions in your block.

Real time filtering for less noise

Easily and comprehensively filter decoded transactions using Blocknative’s low-latency, real time, census level Mempool platform. Automatically filter out unnecessary transactions from the start through our customizable filters and subscriptions.

Optimized arbitrage opportunities

Simulate bundles to preview net-balance change and smart contract calls. Automatically filter out unnecessary transactions from the start through our customizable filters and subscriptions.

Maximum gas profitability

Blocknative’s Gas Platform considers the size of transactions and gas prices to give you the most accurate understanding of what transactions to include in your block ensuring your block has the best chance of winning.

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Block Building FAQ

Block Building is a newly accessible category that emerged when Ethereum shifted from PoW to PoS. The innovation which allows for this new block building capability is separation of block production from proposers, otherwise known as PBS (proposer-builder separation).

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How Block Building Affects the Entire Ethereum Ecosystem / How do you know if block building is right for you?

Block builders decide what happens in a transaction's lifecycle by taking the contents of the mempool, private orders, and MEV bundles, to move a transaction from the pre-chain layer to on-chain. No matter where you interact with the blockchain, block builders affect you and it is important to understand how.

Transaction Originator

As the transaction source, you power the possibilities in the mempool. MEV searchers look at your transactions to find arbitrage opportunities. Sometimes this has no effect on you and sometimes this has a negative impact. We are building the infrastructure that lets you decide what you want to participate in.

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Wallets

As the place Transaction Originators (TO) trust to store their value, Wallets are crucial to TOs experiences.

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