Create sha256 hash clarity

(define-read-only (create-sha256-hash (data (buff 4096)))
  (sha256 (unwrap-panic (to-consensus-buff? data)))
)

;; Example usage
(define-read-only (hash-message (message (string-utf8 200)))
  (create-sha256-hash (unwrap-panic (to-consensus-buff? message)))
)

;; Hash a simple string
(print (hash-message u"Hello World"))

Description

Generate SHA-256 hashes from buffer data in Clarity smart contracts

Use Cases

• Creating unique identifiers from data
• Verifying data integrity in contracts
• Implementing commit-reveal schemes
• Building merkle trees for proofs

Key Concepts

• Takes a buffer as input (max 1MB)
• Returns a 32-byte buffer hash
• Uses to-consensus-buff? to ensure consistent encoding
• Produces the same hash as off-chain implementations