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1import FungibleToken from 0xf233dcee88fe0abe
2          import NonFungibleToken from 0x1d7e57aa55817448
3          import EVMVMBridgedToken_99af3eea856556646c98c8b9b2548fe815240750 from 0x1e4aa0b87d10b141
4          import FlowToken from 0x1654653399040a61
5          import D3SKOfferNFT from 0x5ec90e3dcf0067c4
6          import D3SKFillProxy from 0x5ec90e3dcf0067c4
7
8          transaction(sellAmount: UFix64, askTokenTypeIdentifier: String, askAmount: UFix64, duration: UFix64) {
9              prepare(signer: auth(BorrowValue, SaveValue, LoadValue, IssueStorageCapabilityController, PublishCapability, UnpublishCapability) &Account) {
10                  // Calculate expiration
11                  var expiresAt: UFix64? = nil
12                  if duration > 0.0 {
13                      expiresAt = getCurrentBlock().timestamp + duration
14                  }
15
16                  // Setup NFT Collection if not already in storage
17                  if signer.storage.borrow<&D3SKOfferNFT.Collection>(from: D3SKOfferNFT.CollectionStoragePath) == nil {
18                      signer.storage.save(<- D3SKOfferNFT.createEmptyCollection(nftType: Type<@D3SKOfferNFT.NFT>()), to: D3SKOfferNFT.CollectionStoragePath)
19                  }
20                  // Publish NFT collection capability if not already published
21                  if !signer.capabilities.get<&D3SKOfferNFT.Collection>(D3SKOfferNFT.CollectionPublicPath).check() {
22                      signer.capabilities.unpublish(D3SKOfferNFT.CollectionPublicPath)
23                      let colCap = signer.capabilities.storage.issue<&D3SKOfferNFT.Collection>(D3SKOfferNFT.CollectionStoragePath)
24                      signer.capabilities.publish(colCap, at: D3SKOfferNFT.CollectionPublicPath)
25                  }
26
27                  // Setup FillProxy — stores auth(Fill) capability privately inside a resource,
28                  // then publishes non-auth &Proxy so takers can call fillOffer without auth
29                  if signer.storage.borrow<&D3SKFillProxy.Proxy>(from: D3SKFillProxy.ProxyStoragePath) == nil {
30                      let fillCap = signer.capabilities.storage.issue<auth(D3SKOfferNFT.Fill) &D3SKOfferNFT.Collection>(D3SKOfferNFT.CollectionStoragePath)
31                      let proxy <- D3SKFillProxy.createProxy(cap: fillCap)
32                      signer.storage.save(<-proxy, to: D3SKFillProxy.ProxyStoragePath)
33
34                      signer.capabilities.unpublish(D3SKFillProxy.ProxyPublicPath)
35                      let proxyCap = signer.capabilities.storage.issue<&D3SKFillProxy.Proxy>(D3SKFillProxy.ProxyStoragePath)
36                      signer.capabilities.publish(proxyCap, at: D3SKFillProxy.ProxyPublicPath)
37                  }
38
39                  // Ensure maker has ask token vault (so taker can pay them on fill)
40                  if signer.storage.borrow<&{FungibleToken.Receiver}>(from: /storage/flowTokenVault) == nil {
41                      let emptyVault <- FlowToken.createEmptyVault(vaultType: Type<@FlowToken.Vault>())
42                      signer.storage.save(<-emptyVault, to: /storage/flowTokenVault)
43                      let receiverCap = signer.capabilities.storage.issue<&{FungibleToken.Receiver}>(/storage/flowTokenVault)
44                      signer.capabilities.publish(receiverCap, at: /public/flowTokenReceiver)
45                  }
46
47                  // Withdraw sell tokens
48                  let vaultRef = signer.storage.borrow<auth(FungibleToken.Withdraw) &EVMVMBridgedToken_99af3eea856556646c98c8b9b2548fe815240750.Vault>(
49                      from: /storage/EVMVMBridgedToken_99af3eea856556646c98c8b9b2548fe815240750Vault
50                  ) ?? panic("Could not borrow sell token vault")
51                  let sellVault <- vaultRef.withdraw(amount: sellAmount)
52
53                  let askType = CompositeType(askTokenTypeIdentifier)
54                      ?? panic("Invalid ask token type")
55
56                  // Mint offer NFT (also registers with D3SKRegistry)
57                  let offerNFT <- D3SKOfferNFT.mintOffer(
58                      sellVault: <-sellVault,
59                      askTokenType: askType,
60                      askAmount: askAmount,
61                      makerAddress: signer.address,
62                      expiresAt: expiresAt
63                  )
64
65                  // Deposit the NFT into signer's collection
66                  let collectionRef = signer.storage.borrow<&D3SKOfferNFT.Collection>(
67                      from: D3SKOfferNFT.CollectionStoragePath
68                  ) ?? panic("Could not borrow collection")
69                  collectionRef.deposit(token: <-offerNFT)
70              }
71          }