alex-portal

;; title: alex-connector
;; version: 1.0.0
;; summary: ALEX DEX connector
;; description: Interface with ALEX DEX - Clarity 4

;; Constants
(define-constant CONTRACT-OWNER tx-sender)
(define-constant ERR-UNAUTHORIZED (err u5800))
(define-constant ERR-SWAP-FAILED (err u5801))
(define-constant ERR-SLIPPAGE-EXCEEDED (err u5802))

;; Max slippage (basis points)
(define-constant MAX-SLIPPAGE u500)  ;; 5%

;; Data Variables
(define-data-var total-swaps uint u0)
(define-data-var total-volume uint u0)

;; Data Maps - Using stacks-block-time for Clarity 4
(define-map swap-history uint {
  user: principal,
  token-in: principal,
  token-out: principal,
  amount-in: uint,
  amount-out: uint,
  timestamp: uint,  ;; Clarity 4: Unix timestamp
  pool-id: uint
})

(define-map pool-stats uint {
  total-volume: uint,
  swap-count: uint,
  last-swap: uint  ;; Clarity 4: Unix timestamp
})

;; Public Functions

(define-public (swap-exact-tokens-for-tokens
  (token-in principal)
  (token-out principal)
  (amount-in uint)
  (min-amount-out uint)
  (pool-id uint))
  (let (
    (swap-id (var-get total-swaps))
    (amount-out (calculate-output amount-in pool-id))
  )
    (asserts! (>= amount-out min-amount-out) ERR-SLIPPAGE-EXCEEDED)

    (map-set swap-history swap-id {
      user: tx-sender,
      token-in: token-in,
      token-out: token-out,
      amount-in: amount-in,
      amount-out: amount-out,
      timestamp: stacks-block-time,
      pool-id: pool-id
    })

    (var-set total-swaps (+ swap-id u1))
    (var-set total-volume (+ (var-get total-volume) amount-in))

    (print {
      event: "alex-swap",
      swap-id: swap-id,
      amount-in: amount-in,
      amount-out: amount-out,
      timestamp: stacks-block-time
    })

    (ok amount-out)
  )
)

(define-public (add-liquidity-alex
  (token-a principal)
  (token-b principal)
  (amount-a uint)
  (amount-b uint)
  (pool-id uint))
  (begin
    (print {
      event: "alex-liquidity-added",
      pool-id: pool-id,
      amount-a: amount-a,
      amount-b: amount-b,
      timestamp: stacks-block-time
    })

    (ok true)
  )
)

;; Private Functions

(define-private (calculate-output (amount-in uint) (pool-id uint))
  ;; Simplified AMM calculation
  (/ (* amount-in u997) u1000)  ;; 0.3% fee
)

;; Read-Only Functions

(define-read-only (get-swap-history (swap-id uint))
  (map-get? swap-history swap-id)
)

(define-read-only (get-pool-stats (pool-id uint))
  (map-get? pool-stats pool-id)
)

(define-read-only (get-total-volume)
  (var-get total-volume)
)

(define-read-only (quote-swap (amount-in uint) (pool-id uint))
  (ok (calculate-output amount-in pool-id))
)