Every node is represented by a Node object. It has its own (host, port) and must have a consensus a initialisation parameter.
Every consensus needs the following methods/attributes:
verify_chain(chain, previous_state): Method that verifies that the specifiedchainrespects the consensus. Theprevious_stateis the state of the previous block.self.block_generation: Specified in the constructor, this is a thread object that will produce the blocks respecting the consensus.self.genesis: Genesis block that will be the first block of every node using this consensus.
The whole project is based on a custom timer. Each node possess its own CustomTimer. At each control step of one robot, the timer is incremented by 1.
The consensus options are contained in their own file
MINING_DIFFICULTY: This represents the difficulty of mining and is thus related to the time taken to produce a block
ProofOfWork.trust: Determines if the state should be checked or not when verifying a chain
BLOCK_PERIOD: Minimum difference between two consecutive block’s timestamps.
DIFF_INTURN: Block score (difficulty) for blocks containing in-turn signatures (by the preferred producer of this turn)
DIFF_NOTURN: Block score (difficulty) for blocks containing out-of-turn signatures (not by the preferred producer of this turn)
ProofOfAuth.trust: Determines if the state should be checked or not when verifying a chain
The genesis block is organised this way:
- miner_id contains the authorised signers list
All the other options are contained in the constants.py file.
MEMPOOL_SYNC_INTERVAL: Time interval between two synchronisation process in the MempoolPinger
CHAIN_SYNC_INTERVAL: Time interval between two synchronisation process in the ChainPinger