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State Variable

Stackr allows rollupors to define their own custom state almost completely unrestricted in terms of what they can do with it This is done by defining a StateVariable and providing relevant types. 
export type StateVariable = <YOUR_STATE_OBJECT>;
this could be as basic as a boolean or a single integer 
export type StateVariable = boolean;
or as complex as a full object with multiple properties and methods. 
export type StateVariable = {
  address: string;
  balance: number;
  nonce: number;
}[];
You can also rename the state variable to something more meaningful to your rollup. 
export type totalRollupSDKsThatAllowYouToBuildMicroRollups = 1;
But hey, that’s a constant 😉

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State Transport

Once you have defined your state variable, you need to define how it is transported around. StateTransport is just a wrapper around your state variable that allows you to define how it is transported around. It also helps in defining how it is stored and how the state root is calculated. This transport can also be whatever you want it to be. 
interface StateTransport {
  currentCount: StateVariable;
}
MerkleTree state is considered the most common state transport but Stackr allows you to define any crazy ideas that helps move state in most efficient format.
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