How to Async SHA256 Hash in Tcl - Code Snippet

# Task: Async SHA256 Hash
# Language: Tcl

proc async_sha256_hash() {
    # Implementation for Async SHA256 Hash
    set result = ...; # Initialize variable
    # TODO: Implement core logic here
    # Step 1: Prepare data
    # Step 2: Process Async SHA256 Hash
    puts("Done");
}