;; ========================================
;; VAULTAYIELD - STACKING STRATEGY
;; ========================================
;; Manages STX stacking lifecycle via PoX delegation
;; Handles cycle tracking, lock periods, and pool coordination
;; ========================================
;; CONSTANTS
;; ========================================
(define-constant CONTRACT-OWNER tx-sender)
;; Error codes
(define-constant ERR-NOT-AUTHORIZED (err u100))
(define-constant ERR-ALREADY-STACKING (err u101))
(define-constant ERR-INSUFFICIENT-AMOUNT (err u102))
(define-constant ERR-INVALID-CYCLES (err u103))
(define-constant ERR-LOCKED (err u104))
(define-constant ERR-NOT-STACKING (err u105))
(define-constant ERR-INVALID-POOL (err u106))
;; Stacking constraints
(define-constant MIN-STACKING-AMOUNT u100000000000) ;; 100K STX (100B micro-STX)
(define-constant MAX-CYCLES u12)
(define-constant MIN-CYCLES u1)
;; ========================================
;; DATA VARIABLES
;; ========================================
;; Pool operator who aggregates and stakes our STX
(define-data-var pool-operator (optional principal) none)
;; Current stacking cycle information
(define-data-var current-cycle uint u0)
(define-data-var stacked-amount uint u0)
(define-data-var unlock-cycle uint u0)
;; Stacking status tracking
(define-data-var is-stacking bool false)
;; Phase 3: Will add BTC reward address configuration
;; Authorized vault-core contract
(define-data-var vault-core-contract (optional principal) none)
;; ========================================
;; READ-ONLY FUNCTIONS
;; ========================================
(define-read-only (get-stacking-status)
;; Return current stacking state
{
is-stacking: (var-get is-stacking),
amount: (var-get stacked-amount),
unlock-cycle: (var-get unlock-cycle),
current-cycle: (var-get current-cycle),
pool-operator: (var-get pool-operator)
}
)
(define-read-only (is-unlocked)
;; Check if STX can be withdrawn
;; Returns true if not stacking OR past unlock cycle
(if (var-get is-stacking)
(>= (var-get current-cycle) (var-get unlock-cycle))
true
)
)
(define-read-only (get-pool-operator)
;; Return current pool operator
(var-get pool-operator)
)
(define-read-only (get-stacked-amount)
;; Return amount currently stacked
(var-get stacked-amount)
)
(define-read-only (get-unlock-cycle)
;; Return cycle when STX will unlock
(var-get unlock-cycle)
)
;; ========================================
;; PRIVATE FUNCTIONS
;; ========================================
(define-private (is-authorized-vault)
;; Check if caller is authorized vault-core contract
(match (var-get vault-core-contract)
vault-contract (is-eq contract-caller vault-contract)
false
)
)
;; ========================================
;; PUBLIC FUNCTIONS - Placeholder Stubs
;; ========================================
;; Full implementation will follow in subsequent commits
(define-public (delegate-vault-stx (amount uint) (cycles uint))
;; Delegate STX to pool operator for PoX stacking
;; Only callable by authorized vault-core contract
(let
(
(operator (var-get pool-operator))
(current-stacking (var-get is-stacking))
)
;; Validation checks
(asserts! (is-authorized-vault) ERR-NOT-AUTHORIZED)
(asserts! (not current-stacking) ERR-ALREADY-STACKING)
(asserts! (>= amount MIN-STACKING-AMOUNT) ERR-INSUFFICIENT-AMOUNT)
(asserts! (and (>= cycles MIN-CYCLES) (<= cycles MAX-CYCLES)) ERR-INVALID-CYCLES)
(asserts! (is-some operator) ERR-INVALID-POOL)
;; Update stacking state
(var-set is-stacking true)
(var-set stacked-amount amount)
;; Calculate unlock cycle (current + cycles)
;; In real implementation, would query PoX for current cycle
;; For now, using block height as approximation
(let
(
(current-pox-cycle (/ block-height u2100)) ;; ~2100 blocks per cycle
(new-unlock-cycle (+ current-pox-cycle cycles))
)
(var-set current-cycle current-pox-cycle)
(var-set unlock-cycle new-unlock-cycle)
;; Emit stacking event
(print {
event: "stacking-initiated",
amount: amount,
cycles: cycles,
unlock-cycle: new-unlock-cycle,
pool-operator: operator,
timestamp: block-height
})
;; TODO: Integrate with PoX-4 delegate-stx function
;; (contract-call? 'ST000000000000000000002AMW42H.pox-4 delegate-stx
;; amount
;; (unwrap-panic operator)
;; (unwrap-panic (some unlock-height))
;; (some (var-get reward-btc-address))
;; )
(ok true)
)
)
)
(define-public (revoke-delegation)
;; Revoke STX delegation from pool operator
;; Can only be called when STX is unlocked
;; Emergency function - admin only
(let
(
(stacking-status (var-get is-stacking))
(unlocked (is-unlocked))
)
;; Validation checks
(asserts! (is-eq tx-sender CONTRACT-OWNER) ERR-NOT-AUTHORIZED)
(asserts! stacking-status ERR-NOT-STACKING)
(asserts! unlocked ERR-LOCKED)
;; Reset stacking state
(var-set is-stacking false)
(var-set stacked-amount u0)
(var-set unlock-cycle u0)
;; Emit revocation event
(print {
event: "delegation-revoked",
previous-amount: (var-get stacked-amount),
revoked-at-cycle: (var-get current-cycle),
timestamp: block-height
})
;; TODO: Integrate with PoX-4 revoke-delegate-stx function
;; (contract-call? 'ST000000000000000000002AMW42H.pox-4 revoke-delegate-stx)
(ok true)
)
)
(define-public (update-pool-operator (new-operator principal))
;; Change pool operator address
;; Cannot change during active stacking period
;; Admin only
(let
(
(currently-stacking (var-get is-stacking))
)
;; Validation checks
(asserts! (is-eq tx-sender CONTRACT-OWNER) ERR-NOT-AUTHORIZED)
(asserts! (not currently-stacking) ERR-LOCKED)
;; Update pool operator
(var-set pool-operator (some new-operator))
;; Emit update event
(print {
event: "pool-operator-updated",
new-operator: new-operator,
timestamp: block-height
})
(ok true)
)
)
;; ========================================
;; ADMIN FUNCTIONS
;; ========================================
(define-public (set-vault-core (vault-contract principal))
;; Set authorized vault-core contract
(begin
(asserts! (is-eq tx-sender CONTRACT-OWNER) ERR-NOT-AUTHORIZED)
(var-set vault-core-contract (some vault-contract))
(ok true)
)
)
;; Phase 3: Will add set-reward-btc-address function