Contract storage layout

🛠️ Builders 🏄🏻‍♀️ Cadence
1

For variables defined in the cadence contract, if they’re not explicitly save() to the storage path, where are they stored? For example the HelloWorld.cdc contract from the playground:

access(all) contract HelloWorld {

  // Declare a public field of type String.
  //
  // All fields must be initialized in the init() function.
  access(all) let greeting: String

  // The init() function is required if the contract contains any fields.
  init() {
      self.greeting = "Hello from account 2!"
  }

  // Public function that returns our friendly greeting!
  access(all) fun hello(): String {
      return self.greeting
  }
}

Should self.greeting field still be stored in the accout storage area somewhere? What is the storage layout then?

2

State that is managed by a contract is not stored in the normal storage layout of an account, meaning it is not accessible through a Path via the AuthAccount object. Contracts have their own special place in storage that is only accessible through the rules defined by the contract.

Does that help?

3

That’s clear to me, thank you Josh. Contracts have their own special place in storage that is only accessible through the rules defined by the contract - it’d be better if this can also be mentioned in the docs :slight_smile: