Mixnet Contract

The Mixnet smart contract is a core piece of the Nym system, functioning as the mixnet directory and keeping track of delegations and rewards: the core functionality required by an incentivised mixnet. You can find the code and build instructions here (opens in a new tab).

Having a smart contract act as a decentralised topology directory for clients connecting to the Mixnet allows us to mitigate several possible attacks which systems relying on P2P networking are susceptible to. See Why Nym is not P2P.

Functionality The Mixnet contract has multiple functions:

• storing bonded mix node and gateway information (and removing this on unbonding).
• providing the network-topology to the (cached) Validator API endpoint used by clients on startup for routing information.
• storing delegation and bond amounts.
• storing reward amounts.

The addresses of deployed smart contracts can be found in the network-defaults (opens in a new tab) directory of the codebase alongside other network default values.