Pianist-gnark

This repo is an implementation of Pianist based on the library gnark.

How to run the code

Install Go

wget https://go.dev/dl/go1.20.5.linux-amd64.tar.gz # find the correct package on https://go.dev/dl/.
rm -rf /usr/local/go && sudo tar -C /usr/local -xzf go1.20.5.linux-amd64.tar.gz
export PATH=$PATH:/usr/local/go/bin

On the same computer

Although Pianist is a zero-knowledge scheme deployed on a distributed system, it can be simulated on a single machine. In the case, the machine creates two processes and exchanges messages through ssh connection.

Configure SSH

1. install openssh-server

sudo apt install openssh-server

2. Configure ssh key

ssh-keygen -t rsa -b 4096
ssh-copy-id ${USER}@localhost
chmod go-w ~/
chmod 700 ~/.ssh
chmod 600 ~/.ssh/authorized_keys

Clone the dreamATD/pianist-gnark-crypto/ under the same directory as /pianist-gnark.

git clone git@github.com:dreamATD/pianist-gnark-crypto.git

Generate the ip.txt

Write a file containing the IP information in your cluster. Since here we use localhost to simulate two machines, we set different ports. Here is an example:

localhost:9998
localhost:9999

Configure the path of ip.txt and key files

In the /pianist-gnark-crypto/ecc/bn254/fr/dkzg/dkzg.go, configure init() function by the path of ip.txt, path of the private key used to log in the other machines and the username.

Run the code

Under /pianist-gnark/examples/piano (or /pianist-gnark/examples/gpiano if you want to run the version for general circuits), run the following command:

go run main.go

Some clarification for the examples in pianist-gnark/examples/piano (and similar to pianist-gnark/examples/gpiano)

Showing the follosing output means it runs successfully:

[127.0.0.1 192.168.1.44 172.17.0.1]
rank 1 [127.0.0.1 192.168.1.44 172.17.0.1]

rank 1 [127.0.0.1 192.168.1.44 172.17.0.1]

Connected to slave 1
Sent working directory to slave 1

rank 1 Received buf size 60

rank 1 14:40:16 INF compiling circuit curve=bn254

rank 1 14:40:16 INF parsed circuit inputs nbPublic=2 nbSecret=1

14:40:16 INF compiling circuit curve=bn254
14:40:16 INF parsed circuit inputs nbPublic=2 nbSecret=1
14:40:16 INF building constraint system curve=bn254 nbConstraints=27999
rank 1 14:40:16 INF building constraint system curve=bn254 nbConstraints=27999

rank 1 Prover started

rank 1 14:40:18 DBG constraint system solver done backend=plonk curve=bn254 nbConstraints=27999 took=9.924368

rank 1 Solution computed

Prover started
14:40:18 DBG constraint system solver done backend=plonk curve=bn254 nbConstraints=27999 took=7.477513
Solution computed
rank 1 14:40:21 DBG prover done backend=piano curve=bn254 nbConstraints=27999 took=2195.654321

rank 1 Done

14:40:21 DBG verifier done backend=piano curve=bn254 took=6.606371
Done