Module storage

Functions

• storage
  This function

  • marks the contract as having storage, so that macros::utils::module_has_storage will return true,
  • marks the struct s as the one describing the storage layout of a contract,
  • generates an impl block for the storage struct with an init function (call to init is then injected at the beginning of every #[external(...)] and #[internal] contract function and the storage is then available as self.storage),
  • creates a StorageLayout struct that is is exposed via the abi(storage) macro in the contract artifact.
• storage_no_init
  Same as storage, except the user is in charge of providing an implementation of the init constructor function with signature fn init<Context>(context: Context) -> Self, which allows for manual control of storage slot allocation. Similarly, no StorageLayout struct will be created.

Globals

• STORAGE_LAYOUT_NAME
  Stores a map from a module to the name of the struct that describes its storage layout. This is then used when generating a storage_layout() getter on the contract struct.