(use-trait tradables-trait .tradable-trait.tradables-trait)
(define-data-var minimum-commission uint u100) ;; minimum commission 1% by default
(define-data-var minimum-listing-price uint u1000000) ;; minimum listing price 1 STX
(define-data-var listings-frozen bool false) ;; turn off the ability to list additional NFTs
(define-map on-sale
{tradables: principal, tradable-id: uint}
{price: uint, commission: uint, owner: principal}
)
(define-constant contract-owner tx-sender)
(define-constant err-payment-failed u1)
(define-constant err-transfer-failed u2)
(define-constant err-not-allowed u3)
(define-constant err-duplicate-entry u4)
(define-constant err-tradable-not-found u5)
(define-constant err-commission-or-price-too-low u6)
(define-constant err-listings-frozen u7)
(define-read-only (get-listing (tradables <tradables-trait>) (tradable-id uint))
(match (map-get? on-sale {tradables: (contract-of tradables), tradable-id: tradable-id})
nft-data
(ok nft-data)
(err err-tradable-not-found)
)
)
(define-private (get-owner (tradables <tradables-trait>) (tradable-id uint))
(contract-call? tradables get-owner tradable-id)
)
(define-private (transfer-tradable-to-escrow (tradables <tradables-trait>) (tradable-id uint))
(begin
(contract-call? tradables transfer tradable-id tx-sender (as-contract tx-sender))
)
)
(define-private (transfer-tradable-from-escrow (tradables <tradables-trait>) (tradable-id uint))
(let ((owner tx-sender))
(begin
(as-contract (contract-call? tradables transfer tradable-id (as-contract tx-sender) owner))
)
)
)
(define-private (return-tradable-from-escrow (tradables <tradables-trait>) (tradable-id uint))
(match (map-get? on-sale {tradables: (contract-of tradables), tradable-id: tradable-id})
nft-data
(let ((owner tx-sender))
(begin
(as-contract (contract-call? tradables transfer tradable-id (as-contract tx-sender) (get owner nft-data)))
)
)
(err err-tradable-not-found)
)
)
(define-public (list-asset (tradables <tradables-trait>) (tradable-id uint) (price uint) (commission uint))
(begin
(asserts! (is-eq false (var-get listings-frozen)) (err err-listings-frozen))
(let ((tradable-owner (unwrap! (unwrap-panic (get-owner tradables tradable-id)) (err err-tradable-not-found))))
(if (and (>= commission (var-get minimum-commission)) (>= price (var-get minimum-listing-price)))
(if (is-eq tradable-owner tx-sender)
(if (map-insert on-sale {tradables: (contract-of tradables), tradable-id: tradable-id}
{price: price, commission: commission, owner: tradable-owner})
(begin
(match (transfer-tradable-to-escrow tradables tradable-id)
success (begin
(print {type: "list-asset", value: {tradables: (contract-of tradables), tradable-id: tradable-id}})
(ok true))
error (begin (print error) (err err-transfer-failed))))
(err err-duplicate-entry)
)
(err err-not-allowed)
)
(err err-commission-or-price-too-low)
)
)
)
)
(define-public (unlist-asset (tradables <tradables-trait>) (tradable-id uint))
(match (map-get? on-sale {tradables: (contract-of tradables), tradable-id: tradable-id})
nft-data
(if (is-eq (get owner nft-data) tx-sender)
(match (transfer-tradable-from-escrow tradables tradable-id)
success (begin
(map-delete on-sale {tradables: (contract-of tradables), tradable-id: tradable-id})
(print {type: "unlist-asset", value: {tradables: (contract-of tradables), tradable-id: tradable-id}})
(ok true))
error (begin (print error) (err err-transfer-failed)))
(err err-not-allowed)
)
(err err-tradable-not-found)
)
)
;; tx sender has to send the required amount
;; tx sender receives NFT
;; owner gets paid out the amount minus commission
;; stxnft address gets paid out commission
(define-public (purchase-asset (tradables <tradables-trait>) (tradable-id uint))
(match (map-get? on-sale {tradables: (contract-of tradables), tradable-id: tradable-id})
nft-data
(let ((price (get price nft-data)) (commission-amount (/ (* price (get commission nft-data)) u10000)) (to-owner-amount (- price commission-amount)))
;; first send the amount to the owner
(match (stx-transfer? to-owner-amount tx-sender (get owner nft-data))
owner-success ;; sending money to owner succeeded
(match (stx-transfer? commission-amount tx-sender contract-owner)
commission-success ;; sending commission to contract owner succeeded
(match (transfer-tradable-from-escrow tradables tradable-id)
transfer-success (ok true) ;; sending NFT to buyer succeeded
error (err err-transfer-failed)
)
error (err err-payment-failed)
)
error (err err-payment-failed)
)
)
(err err-tradable-not-found)
)
)
(define-public (admin-unlist-asset (tradables <tradables-trait>) (tradable-id uint))
(match (map-get? on-sale {tradables: (contract-of tradables), tradable-id: tradable-id})
nft-data
(if (is-eq contract-owner tx-sender)
(match (return-tradable-from-escrow tradables tradable-id)
success (begin
(map-delete on-sale {tradables: (contract-of tradables), tradable-id: tradable-id})
(print {type: "unlist-asset", value: {tradables: (contract-of tradables), tradable-id: tradable-id}})
(ok true))
error (begin (print error) (err err-transfer-failed)))
(err err-not-allowed)
)
(err err-tradable-not-found)
)
)
(define-public (set-minimum-commission (commission uint))
(begin
(asserts! (is-eq tx-sender contract-owner) (err err-not-allowed))
(ok (var-set minimum-commission commission))
)
)
(define-public (set-minimum-listing-price (price uint))
(begin
(asserts! (is-eq tx-sender contract-owner) (err err-not-allowed))
(ok (var-set minimum-listing-price price))
)
)
(define-public (set-listings-frozen (frozen bool))
(begin
(asserts! (is-eq tx-sender contract-owner) (err err-not-allowed))
(ok (var-set listings-frozen frozen))
)
)