messages

;; Messages
(define-map messages uint {sender: principal, recipient: principal, content: (string-ascii 500)})
(define-data-var message-id uint u0)
(define-public (send-message (recipient principal) (content (string-ascii 500)))
  (let ((id (var-get message-id)))
    (map-set messages id {sender: tx-sender, recipient: recipient, content: content})
    (var-set message-id (+ id u1))
    (ok id)))
(define-read-only (get-message (id uint))
  (map-get? messages id))