How to Async Verify Signature in SQL - Code Snippet

-- Task: Async Verify Signature
-- Language: SQL

CREATE PROCEDURE async_verify_signature() BEGIN
    -- Implementation for Async Verify Signature
    DECLARE result = ...; -- Initialize variable
    -- TODO: Implement core logic here
    -- Step 1: Prepare data
    -- Step 2: Process Async Verify Signature
    SELECT("Done");
END