HelixMesh: a Consensus Protocol for IoT

We provide a technical exposition of the HelixMesh protocol and the underlying DAG-based transaction ledger. The HelixMesh is optimized for high-throughput IoT networks on the premise that most transactions carry only a data payload rather than a value transfer. The consensus algorithm is a novel implementation of the hybrid on-/off-chain Mesh-Cash framework based on probabilistic peer sampling for the off-chain layer. We further introduce a flexible "Proof-Of-Contribution" adversarial model which supports both closed permissioned (with standard BFT assumptions) and persmissionless (e.g. based on Proof-Of-Work) networks.