Which consensus algorithm does Hyperledger Sawtooth utilize that minimizes power consumption?

Hyperledger Sawtooth utilizes the Proof of Elapsed Time (PoET) consensus algorithm, which minimizes power consumption by leveraging trusted execution environments (TEEs). This approach allows nodes to minimize the energy used for reaching consensus in a blockchain network.

In PoET, each node in the network waits for a random amount of time and then presents its claim to create a new block. The randomness ensures that block creation is fair and does not require extensive computational efforts that are characteristic of algorithms like Proof of Work (PoW). This makes it significantly more energy-efficient since it avoids the intensive resource expenditure associated with solving complex cryptographic puzzles. Instead, nodes merely need a TEEs, which inherently provides security and validates the process without requiring high levels of computational power.

Overall, PoET is particularly suited for permissioned networks, like those using Hyperledger Sawtooth, where requirements for efficiency and fast transactions are essential. This efficient approach is part of why PoET stands out among consensus algorithms in reducing environmental impact and power consumption.