boardgame.io only runs game logic on the server, and it censors the State just before sending it to each client. This strategy makes the UI feel less responsive, but it keeps things simple.
The Swords and Ravens blog post recommends resolving actions on the client when they don't require secret information, but resolving other actions on the server. You'd also need to resolve actions on the server when they involve RNG.
The Swords and Ravens blog post recommends resolving actions on the client when they don't require secret information, but resolving other actions on the server. You'd also need to resolve actions on the server when they involve RNG.