A new taxonomy divides DAG-based consensus protocols into availability-focused and consistency-focused families, with subcategories for structured versus unstructured and optimistic versus certified DAGs.
Obelia: Scaling DAG-Based Blockchains to Hundreds of Validators
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abstract
Obelia improves upon structured DAG-based consensus protocols used in proof-of-stake systems, allowing them to effectively scale to accommodate hundreds of validators. Obelia implements a two-tier validator system. A core group of high-stake validators that propose blocks as in current protocols and a larger group of lower-stake auxiliary validators that occasionally author blocks. Obelia incentivizes auxiliary validators to assist recovering core validators and integrates seamlessly with existing protocols. We show that Obelia does not introduce visible overhead compared to the original protocol, even when scaling to hundreds of validators, or when a large number of auxiliary validators are unreliable.
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cs.DC 1years
2024 1verdicts
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SoK: DAG-based Consensus Protocols
A new taxonomy divides DAG-based consensus protocols into availability-focused and consistency-focused families, with subcategories for structured versus unstructured and optimistic versus certified DAGs.