ISAAC+ Mechanism

As described at the previous section, the consensus voting is processed thru voting stages, INIT, SIGN and ACCEPT. The node, which can participate in consensus process, set its state to Consensus state. If node is under other state, it means node is not ready for participating consensus process.

Voting and Round

In ISAAC+, node votes to make agreement with the others. How node can vote? The voting process is simple, just broadcasts Ballot to the entire network and gathers ballots from others.

Every node knows which nodes are in suffrage group and which nodes are in acting suffrage group at this stage and round. The member information does not need to be shared or synced, because it is managed and established at block like other data of block.

Voting occurs by round. For example, the latest block is H33,

  1. INIT : H34, R0

  2. SIGN : H34, R0

    • Failed to get agreement: INIT : H34, R1

  3. SIGN : H34, R1

  4. ACCEPT : H34, R1

  5. New INIT : H35, R0

Like the example, round is unique within new block voting.