> ## Documentation Index
> Fetch the complete documentation index at: https://docs.starknet.io/llms.txt
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# core::starknet::syscalls::storage_read_syscall

Gets the value of a key in the storage of the calling contract.

## Signature

```rust theme={null}
pub extern fn storage_read_syscall(address_domain: u32, address: StorageAddress) -> Result> implicits(GasBuiltin, System) nopanic;
```

#### Arguments

* `address_domain` - The domain of the address. Only `address_domain` 0 is currently supported,
  in the future it will enable access to address spaces with different data availability
  guarantees.
* `address` - The address of the storage key to read.