There are no Bitcoin- or Ethereum-like miners on Public Mint, as its consensus protocol is not based on Proof-of-Work.
Public Mint uses the IBFT 2.0 Proof-of-Authority protocol, which is Byzantine fault tolerant and completely forkless. IBFT 2.0 allows for immediate transaction finality and a much higher throughput than Ethereum’s PoW.
Transactions are added to the blockchain (“mined”) by validator nodes, who collect transaction fees for their work. All validators are known to the network and can be held accountable in case of misconduct.