StairDag: Cross-DAG Validation For Scalable BFT Consensus
release_alogqgh6orcstff3pvx7xjnz2y
by
Quan Nguyen, Andre Cronje, Michael Kong, Alex Kampa, George Samman
2019
Abstract
This paper introduces a new consensus protocol, so-called , for
fast consensus in DAG-based trustless system. In , we propose a new
approach to creating local block DAG, namely x-DAG (cross-DAG), on each
node. protocol is based on our Proof-of-Stake StakeDag framework
<cit.> that distinguishes participants into users and validators by
their stake. Both users and validators can create and validate event blocks.
Unlike StakeDag's DAG, x-DAG ensures that each new block has to have parent
blocks from both Users and Validators to achieve more safety and liveness. Our
protocol leverages a pool of validators to expose more validating power to new
blocks for faster consensus in a leaderless asynchronous system. Further, our
framework allows participants to join as observers / monitors, who can retrieve
DAG for post-validation, but do not participate in onchain validation.
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