Mining Simulator
This tool provides a way to simulate miners colluding to analyze how the collusion affects the network and profitability of honest miners.
Usage
python3 miner-sim.py [-h] [--honest HONEST] [--colluding COLLUDING] [--rounds ROUNDS] [--graph] [--fork FORK]
-h,--help: show help message and exit--verbose: Print more information about the simulation--honest HONEST: Number of honest miners (default is 3)--colluding COLLUDING: Number of colluding miners (default is 2)--rounds ROUNDS: Number of mining rounds to simulate (default is 10000)--gap GAP: Gap allowed by colluding miners, i.e. if fork height +GAP>= tip height, continue building on the fork, else, revert to building on the tip (default is 5)--graph: Generate a graph of the blockchain, output to blockchain_simulation.png
Statistics
The tool will print some statistics at the end of the simulation:
Fork statistics:
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Num forks: 657
Max depth: 30
Abandoned blocks: 2790/10000 (27.9%)
--------------------
Miner statistics:
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Honest miners: 82.48% confirmed
Colluding miners: 56.28% confirmed
The --verbose flag will print additional details, about each miner and each fork:
Fork statistics:
--------------------
Num forks: 1
* From height 2 to 5
Max depth: 4
Abandoned blocks: 4/10 (40.0%)
--------------------
Miner statistics:
* H1: 0 blocks mined, 0 blocks included: 0% confirmed
* H2: 2 blocks mined, 0 blocks included: 0.0% confirmed
* H3: 2 blocks mined, 0 blocks included: 0.0% confirmed
* C1: 2 blocks mined, 2 blocks included: 100.0% confirmed
* C2: 4 blocks mined, 4 blocks included: 100.0% confirmed
--------------------
Honest miners: 0.0% confirmed
Colluding miners: 100.0% confirmed
Graph
When generating a visualization of the chain (with the --graph flag), the
output will look something like this:
In this visualization, blocks from honest miners have a white background, and blocks from the colluding miners have a pink background. If a block was the tip of the longest chain when it was mined, it will be outlined in blue.