SKALE consensus utilizes multiple block proposers. Block proposers distribute proposals to nodes and collect a BLS-signature based data availability proofs. An Asynchronous Binary Byzantine Agreement is then executed for each block proposal to reach consensus on whether it is data-available. If multiple block proposals are known to be data-available, a BLS-based common coin is used to select the winning proposal that is committed to the chain.

SKALE Consensus uses an Asynchronous Binary Byzantine Agreement (ABBA) protocol. The current implementation uses ABBA from Mostefaoui et al. In general, any ABBA protocol can be used so long as it has the following properties:

• Network model: protocol assumes asynchronous network messaging model.
• Byzantine nodes: protocol assumes less than 1/3 of nodes are Byzantine.
• Initial vote: protocol assumes each node makes an initial yes or no vote.
• Consensus vote: protocol terminates with consensus vote of either yes or no. Where consensus vote is yes, it is guaranteed that at least one honest node voted yes.

The SKALE consensus is still in active development and contains bugs. This software should be regarded as alpha software. Development is still subject to competing the specification, security hardening, further testing, and breaking changes. This consensus engine has not yet been reviewed or audited for security.

to be posted soon

SKALE consensus has been built and tested on Ubuntu.

Ensure that the required packages are installed by executing:

sudo apt-get update
sudo apt-get install -y cmake build-essential libgoogle-perftools-dev libprocps-dev
sudo apt-get install -y libffi-dev autotools-dev automake bison flex yasm texinfo

Clone project and configure build:

git clone --recurse-submodules https://github.com/skalenetwork/skale-consensus.git
# Configure the project and create a build directory.
./libBLS/deps/build.sh # build libBLS's dependencies
cmake -H. -Bbuild # Configure the build.
cmake --build build -- -j$(nproc) # Build all default targets using all cores.

Navigate to the testing directories and run ./consensusd .

• libBLS by SKALE Labs

If you have any questions please ask our development community on Discord.

Copyright (C) 2018-present SKALE Labs