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declareState

declareState<T>(SmartContract: T, states: Record<string, FlexibleProvablePure<unknown>>): void

declareState can be used in place of the @state decorator to declare on-chain state on a SmartContract. It should be placed after the class declaration. Here is an example of declaring a state property x of type Field.

class MyContract extends SmartContract {
  x = State<Field>();
  // ...
}
declareState(MyContract, { x: Field });

If you're using pure JS, it's not possible to use the built-in class field syntax, i.e. the following will not work:

// THIS IS WRONG IN JS!
class MyContract extends SmartContract {
  x = State();
}
declareState(MyContract, { x: Field });

Instead, add a constructor where you assign the property:

class MyContract extends SmartContract {
  constructor(x) {
    super();
    this.x = State();
  }
}
declareState(MyContract, { x: Field });

Type parameters​

• T extends typeof SmartContract

Parameters​

• SmartContract: T

• states: Record\<string, FlexibleProvablePure\<unknown>>

Returns​

void

Source​

lib/mina/state.ts:163