Block Selection Honesty refers to the principle that participants responsible for choosing the next block to add to a blockchain do so fairly and without bias. This means selecting a block based purely on protocol rules, such as the longest chain rule or a predetermined proposer schedule, rather than personal gain or censorship. It is a fundamental element for maintaining decentralization and trust in a distributed ledger system.
Context
Ensuring block selection honesty is a primary design goal for many blockchain consensus mechanisms, particularly in proof-of-stake protocols. Concerns often arise around potential centralization or manipulation if a small group gains undue influence over block production. Developments in proposer-builder separation and verifiable random functions aim to strengthen this honesty, preventing malicious actors from unfairly prioritizing or excluding transactions.
New mechanism uses concise commitments and statistical honesty tests to mathematically enforce random transaction selection, mitigating ordering manipulation.
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