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marketplace.gno

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 1package guardians
 2
 3import (
 4	"chain"
 5
 6	"gno.land/p/nt/avl/v0"
 7	"gno.land/p/nt/grc721/v0"
 8	"gno.land/p/nt/ufmt/v0"
 9)
10
11var (
12	authorizedMarketplace address
13	settledMarketNonces  avl.Tree
14)
15
16func AuthorizedMarketplace() address { return authorizedMarketplace }
17
18// SetAuthorizedMarketplace is a one-time binding made before minting. Keeping
19// the PrivateLedger and Token handle private prevents other approved operators
20// from bypassing the official royalty settlement path.
21func SetAuthorizedMarketplace(cur realm, marketplace address) {
22	assertAdmin(cur.Previous().Address())
23	if authorizedMarketplace.IsValid() {
24		panic("guardians: authorized marketplace is locked")
25	}
26	if !marketplace.IsValid() {
27		panic("guardians: invalid marketplace address")
28	}
29	if token.TotalSupply() != 0 || !salePaused {
30		panic("guardians: configure marketplace before minting and sale activation")
31	}
32	authorizedMarketplace = marketplace
33	chain.Emit("MarketplaceAuthorized", "marketplace", marketplace.String())
34}
35
36// MarketplaceTransfer is the only operator-transfer route. The authorized
37// market supplies its consumed listing nonce and gross price for audit events.
38func MarketplaceTransfer(cur realm, seller, buyer address, tokenID string, grossPrice, nonce int64) {
39	marketplace := cur.Previous().Address()
40	if marketplace != authorizedMarketplace || !authorizedMarketplace.IsValid() {
41		panic("guardians: caller is not authorized marketplace")
42	}
43	if grossPrice < 1 || nonce < 1 {
44		panic("guardians: invalid marketplace settlement")
45	}
46	nonceKey := marketplace.String() + ":" + ufmt.Sprintf("%d", nonce)
47	if settledMarketNonces.Has(nonceKey) {
48		panic("guardians: marketplace nonce already settled")
49	}
50	if OwnerOf(tokenID) != seller {
51		panic("guardians: marketplace seller is not token owner")
52	}
53	if !token.IsApprovedForAll(seller, marketplace) {
54		panic("guardians: marketplace operator approval required")
55	}
56
57	settledMarketNonces.Set(nonceKey, true)
58	if err := ledger.TransferFrom(marketplace, seller, buyer, grc721.TokenID(tokenID)); err != nil {
59		panic(err)
60	}
61	chain.Emit(
62		"MarketplaceSettlementTransfer",
63		"marketplace", marketplace.String(),
64		"tokenId", tokenID,
65		"seller", seller.String(),
66		"buyer", buyer.String(),
67		"grossPrice", ufmt.Sprintf("%d", grossPrice),
68		"nonce", ufmt.Sprintf("%d", nonce),
69	)
70}