velar-interface

;; title: velar-connector
;; version: 1.0.0
;; summary: Velar DEX connector
;; description: Interface with Velar concentrated liquidity - Clarity 4

;; Constants
(define-constant CONTRACT-OWNER tx-sender)
(define-constant ERR-UNAUTHORIZED (err u6000))
(define-constant ERR-INVALID-TICK (err u6001))

;; Data Variables
(define-data-var position-counter uint u0)

;; Data Maps - Using stacks-block-time for Clarity 4
(define-map concentrated-positions uint {
  owner: principal,
  pool-id: uint,
  tick-lower: int,
  tick-upper: int,
  liquidity: uint,
  created-at: uint,  ;; Clarity 4: Unix timestamp
  fees-earned: uint
})

(define-map pool-configuration uint {
  token-a: principal,
  token-b: principal,
  fee-tier: uint,
  tick-spacing: uint,
  sqrt-price: uint
})

;; Public Functions

(define-public (create-position
  (pool-id uint)
  (tick-lower int)
  (tick-upper int)
  (liquidity uint))
  (let (
    (position-id (var-get position-counter))
  )
    (asserts! (< tick-lower tick-upper) ERR-INVALID-TICK)

    (map-set concentrated-positions position-id {
      owner: tx-sender,
      pool-id: pool-id,
      tick-lower: tick-lower,
      tick-upper: tick-upper,
      liquidity: liquidity,
      created-at: stacks-block-time,
      fees-earned: u0
    })

    (var-set position-counter (+ position-id u1))

    (print {
      event: "velar-position-created",
      position-id: position-id,
      pool-id: pool-id,
      timestamp: stacks-block-time
    })

    (ok position-id)
  )
)

(define-public (swap-velar
  (pool-id uint)
  (zero-for-one bool)
  (amount-in uint)
  (min-amount-out uint))
  (let (
    (amount-out (calculate-swap-output amount-in zero-for-one))
  )
    (asserts! (>= amount-out min-amount-out) (err u400))

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

    (ok amount-out)
  )
)

;; Private Functions

(define-private (calculate-swap-output (amount-in uint) (zero-for-one bool))
  ;; Simplified concentrated liquidity calculation
  (/ (* amount-in u995) u1000)  ;; 0.5% fee
)

;; Read-Only Functions

(define-read-only (get-position (position-id uint))
  (map-get? concentrated-positions position-id)
)

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