;; Reentrancy protection
(define-data-var reentrancy-lock bool false;)
;; Enhanced reentrancy protection with context tracking
(define-data-var reentrancy-context (optional principal;) none;);
(define-private (non-reentrant;); (asserts! (is-none (var-get reentrancy-context;);) (err u501;);); (var-set reentrancy-context (some (contract-caller;););)
;)
;(define-private (release-reentrancy;);
(var-set reentrancy-context none;)
;)
;; Enhanced arithmetic guards with context tracking
(define-data-var arithmetic-context (optional principal;) none;);
(define-private (with-arithmetic-guard (fn (function (uint uint;) (response uint uint;);););); (lambda (a uint b uint;); (let (
(ctx (var-get arithmetic-context;);); (caller (contract-caller;););); (asserts! (is-none ctx;) (err u504;);); (var-set arithmetic-context (some caller;);); (let ((result (fn a b;););); (var-set arithmetic-context none;)
result;)
;)
;);)
;; Wrap core arithmetic operations
(define-public safe-add (with-arithmetic-guard
(lambda (a uint b uint;);
(let ((sum (+ a b;););); (asserts! (>= sum a;) (err u502;);); (ok sum;)
;)
;)
;);)
;(define-public safe-mul (with-arithmetic-guard
(lambda (a uint b uint;);
(let ((product (* a b;););); (asserts! (or (eq a 0;) (eq (div product a;) b;);) (err u503;);); (ok product;)
;)
;)
;);)
;; Time-locked arithmetic operations
(define-private (time-locked-add (a uint;); (b uint;) (lock-period uint;);); (let (
(sum (safe-add a b;);); (block-height (at-block-height (unwrap! sum (err u502;););););); (asserts! (> block-height (+ (var-get last-operation-height;) lock-period;);) (err u503;);); (ok sum;)
;)
;)