Function raw_rand 

pub async fn raw_rand() -> Result<[u8; 32], String>

Retrieves 32 bytes of randomness from the Internet Computer management canister.

Behavior

Calls the management canister’s raw_rand method, which returns 32 random bytes (256 bits) of cryptographically secure randomness. These bytes can be used as a seed for random number generators or as a unique salt.

The function performs length validation to ensure the result is exactly 32 bytes.

Returns

• Ok([u8; 32]) containing the random seed bytes on success.
• Err(String) with an error message if the call failed or returned an unexpected length.

Example

let seed = raw_rand().await?;
println!("Received 32 bytes of randomness: {:?}", seed);