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Chia Proof of Space

A prototype of Chia's proof of space, written in C++. Includes a plotter, prover, and verifier. Only runs on 64 bit architectures with AES-NI support. Read the Proof of Space document to learn about what proof of space is and how it works. Read the contest intro to participate in the Proof of Space Contest.

C++ Usage Instructions

Compile

git submodule init
git submodule update
make
make test

Benchmark

time ./ProofOfSpace -k 25 generate

Run tests

./RunTests

CLI usage

./ProofOfSpace -k 25 -f "plot.dat" -m "0x1234" generate
./ProofOfSpace -f "plot.dat" prove <32 byte hex challenge>
./ProofOfSpace -k 25 verify <hex proof> <32 byte hex challenge>
./ProofOfSpace -f "plot.dat" check <iterations>

Hellman Attacks usage

There is an experimental implementation which implements some of the Hellman Attacks that can provide significant space savings for the final file.

make hellman
./HellmanAttacks -k 18 -f "plot.dat" -m "0x1234" generate
./HellmanAttacks -f "plot.dat" check <iterations>

Python

Finally, a python implementation is also provided for the verification algorithm.

Install

git submodule update --init --recursive
python3 -m venv env
. env/bin/activate
pip3 install .

Run python tests

Testings uses pytest.

py.test ./tests/python -s

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