zotho / pow_challenge_server

Proof of Work challenge server

PoW challenge HTTP server

Setup:

docker network create pow
docker build -t pow_challenge_server_http:latest .

Server:

// server <JWT_EXPIRE_SECONDS> <ZERO_COUNT>
docker run \
    --env RUST_LOG=INFO \
    --rm \
    --init \
    -it \
    --net pow \
    --name pow_server \
    pow_challenge_server_http:latest \
    /usr/local/bin/server 5 5

Client:

// client <SERVER_HOSTNAME:PORT> <N_CLIENTS>
docker run \
    --env RUST_LOG=INFO,client=DEBUG \
    --rm \
    --init \
    -it \
    --net pow \
    pow_challenge_server_http:latest \
    /usr/local/bin/client pow_server:3000 10

If you want to recreate recipe.json for Docker.

cargo chef prepare --recipe-path recipe.json

See: https://github.com/LukeMathWalker/cargo-chef

SHA-256

SHA-256 was chosen as the PoW algorithm because it is quite difficult to crack but easy to verify the results. The same algorithm is used in the Hashcash system.

Reference: https://en.wikipedia.org/wiki/Hashcash