Gnosis Prediction Market Contracts Documentation

Collection of smart contracts for the Gnosis prediction market platform ( To interact with those contracts have a look at (


Install requirements with npm:

npm install

Testing and Linting

Run all tests (requires Node version >=7 for async/await, and will automatically run TestRPC in the background):

npm test

Run all tests matching a regexp pattern by setting the TEST_GREP environment variable:

TEST_GREP='short selling' npm test

Lint the JS:

npm run lint

Compile and Deploy

These commands apply to the RPC provider running on port 8545. You may want to have TestRPC running in the background. They are really wrappers around the [corresponding Truffle commands](

Compile all contracts to obtain ABI and bytecode:

npm run compile

Migrate all contracts required for the basic framework onto network associated with RPC provider:

npm run migrate

Network Artifacts

Show the deployed addresses of all contracts on all networks:

npm run networks

Command line options for truffle can be passed down through NPM by preceding the options list with .

For example, to clean network artifacts:

npm run networks -- --clean

Network artifacts from running migrations will contain addresses of deployed contracts on the Kovan and Rinkeby testnets.

Take network info from networks.json and inject it into contract build artifacts. This is done prepublish as well:

npm run injectnetinfo

Extract all network information into networks.json:

Be aware that this will clobber networks.json, so be careful with this command:

npm run extractnetinfo

Gas Measurements

Log gas measurements into build/gas-stats.json:

npm run measuregasstats


There is a copy version hosted online at

Build docs with doxity:


Security and Liability

All contracts are WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.


All smart contracts are released under LGPL v.3.

Indices and tables