Sygma uses Solidity smart contracts to enable transfers to and from EVM compatible chains. These contracts consist of a core bridge contract (Bridge.sol) and a set of handler contracts (ERC20Handler.sol, ERC721Handler.sol, PermissionedGenericHandler.sol, PermissionlessGenericHandler.sol). The bridge contract is responsible for initiating and executing proposed transfers. The handlers are used by the bridge contract to interact with other existing contracts.

To deploy contracts run truffle migrate --network NETWORK_NAME --file <path_to_env_config>.

For more details on specific flags that can be used and format of environemnt configuration check out migrations documentation page.

To add another network do the following:

• update truffle-config.js with the desired configuration
• add the required params to config file for the desired environment (local,dev,testnet,mainnet)
• create a deploy script in migrations directory

Requires nodejs and npm.

make install-deps: Installs truffle and ganache globally, fetches local dependencies. Also installs abigen from go-ethereum.

make bindings: Creates go bindings in ./build/bindings/go

PORT=<port> SILENT=<bool> make start-ganache: Starts a ganache instance, default PORT=8545 SILENT=false

QUIET=<bool> make start-geth: Starts a geth instance with test keys

PORT=<port> make deploy: Deploys all contract instances, default PORT=8545

make test: Runs truffle tests.

make compile: Compile contracts.

We take all security issues seriously, if you believe you have found a security issue within a Sygma project please notify us immediately. If an issue is confirmed, we will take all necessary precautions to ensure a statement and patch release is made in a timely manner.

Please email us a description of the flaw and any related information (e.g. reproduction steps, version) to [email protected].