mpc-demo-infra

A demonstration infrastructure for Multi-Party Computation (MPC) using TLSN and MP-SPDZ.

Table of Contents

• Dependencies
• Getting Started
  • Run it locally
• Configurations
• Troubleshooting

DevCon 2024

To participate in our demo ETH Inequality @ DevCon 2024 and win some prizes, please refer to the README for the entire process.

Dependencies

• python 3
• poetry
• cargo
• TLSN
  • branch: mpspdz-compat
  • clone it as ../tlsn
• MP-SPDZ (only required for computation party server)
  • branch: demo_client
  • clone it as ../MP-SPDZ
  • need to add MOD = -DGFP_MOD_SZ=5 -DRING_SIZE=257 to CONFIG.mine
  • install: make setup
  • build vm: make replicated-ring-party.x

Getting Started

Run it using tests folder

• Here, we already prepopulate corresponding proof and secret file for two input providers from https://github.com/ZKStats/tlsn/tree/mpspdz-compat.

poetry run pytest -s tests/test_integration.py

Run it locally

Note: This section is for running the MPC demo locally. For cloud deployment, you'll need to adjust network configurations.

The demo consists of three main components:

1. Coordination Server: Coordinates the MPC process.
2. Computation Party Servers: Run by 3 trusted parties and perform the actual MPC computations.
3. Client CLI: Used by data provider to share data and query results.

Install dependencies:

./setup_env.sh --setup-mpspdz

Default ports:

• 8005: coordination server
• 80068008: computation party server 02
• 8010~8100: ports used by MPC servers during sharing data and querying results

Please make sure these ports are not used by other services.

Setup coordination server:

In a terminal, run coordination server:

poetry run coord-run

Setup computation party server:

In a terminal, run party 0:

PORT=8006 PARTY_ID=0 poetry run party-run

In another terminal, run party 1:

PORT=8007 PARTY_ID=1 poetry run party-run

In another terminal, run party 2:

PORT=8008 PARTY_ID=2 poetry run party-run

Data provider share data with a generated voucher.

poetry run client-share-data <eth_address> <binance_api_key> <binance_api_secret>

Query computation result

poetry run client-query

Configurations

See available configs in

• coordination server: mpc_demo_infra/coordination_server/config.py
• computation party server: mpc_demo_infra/computation_party_server/config.py
• client CLI: mpc_demo_infra/client_cli/config.py

You can use .env.xxx to override the default configs.

• .env.coord: coordination server. Example in .env.coord.example
• .env.party: computation party server. Example in .env.party.example
• .env.client_cli: client CLI. Example in .env.client_cli.example

Troubleshooting

If you encounter issues:

1. Ensure all dependencies are correctly installed.
2. Check that the required ports (8005-8008, 8010-8100) are not in use.
3. Verify that TLSN and MP-SPDZ are cloned in the correct locations (../tlsn and ../MP-SPDZ).
4. For MP-SPDZ issues, ensure

• you've added MOD = -DGFP_MOD_SZ=5 to CONFIG.mine.
• you've generated certificates for computation parties. If not, run Scripts/setup-ssl.sh under ../MP-SPDZ.
• you've rebuilt the VM. If not, run make replicated-ring-party.x under ../MP-SPDZ.