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1import NonFungibleToken from 0x1d7e57aa55817448
2import Burner from 0xf233dcee88fe0abe
3import HybridCustody from 0xd8a7e05a7ac670c0
4
5/// Transaction to burn multiple NFTs from a collection (supports both main account and child accounts)
6/// Uses the Burner contract for secure NFT burning
7transaction(addresses: [Address], nftIDs: [[UInt64]], collectionStoragePath: [StoragePath]) {
8    /// Collection access info for each burn operation
9    let burnOperations: [{String: AnyStruct}]
10
11    prepare(signer: auth(Storage) &Account) {
12        // Validate input
13        pre {
14            nftIDs.length > 0: "Must provide at least one NFT ID to burn"
15            nftIDs.length == addresses.length: "Must provide the same number of addresses as NFT ID arrays"
16            nftIDs.length == collectionStoragePath.length: "Must provide the same number of NFT IDs as collection storage paths"
17        }
18        
19        self.burnOperations = []
20        
21        // Get HybridCustody manager if available
22        let manager = signer.storage.borrow<auth(HybridCustody.Manage) &HybridCustody.Manager>(from: HybridCustody.ManagerStoragePath)
23        
24        var i = 0
25        while i < addresses.length {
26            let targetAddress = addresses[i]!
27            let path = collectionStoragePath[i]!
28            let nftIDsForAddress = nftIDs[i]!
29            
30            // Determine if this is a child account or main account
31            let isChildAccount = targetAddress != signer.address
32            var collectionRef: auth(NonFungibleToken.Withdraw) &{NonFungibleToken.Collection}? = nil
33            
34            if isChildAccount {
35                // Handle child account burning
36                if let managerRef = manager {
37                    // Get child account access
38                    if let childAccount = managerRef.borrowAccount(addr: targetAddress) {
39                        let capType = Type<auth(NonFungibleToken.Withdraw) &{NonFungibleToken.Provider}>()
40                        let controller = childAccount.getControllerIDForType(type: capType, forPath: path)
41                        ?? panic("no controller found for capType")
42                        let cap = childAccount.getCapability(controllerID: controller, type: capType) ?? panic("no capability found for capType")
43                        collectionRef = cap.borrow<auth(NonFungibleToken.Withdraw) &{NonFungibleToken.Collection}>()
44                    }
45                } else {
46                    panic("Cannot access child account: HybridCustody manager not found")
47                }
48            } else {
49                // Handle main account burning
50                collectionRef = signer.storage.borrow<auth(NonFungibleToken.Withdraw) &{NonFungibleToken.Collection}>(from: path)
51            }
52            
53            // Validate collection was found
54            assert(collectionRef != nil, message: "NFT collection not found at ".concat(path.toString()).concat(" for address ").concat(targetAddress.toString()))
55            
56            // Pre-validate that all NFTs exist in this collection
57            let currentIDs = collectionRef!.getIDs()
58            for nftID in nftIDsForAddress {
59                assert(currentIDs.contains(nftID), message: "NFT with ID ".concat(nftID.toString()).concat(" does not exist in collection at ").concat(targetAddress.toString()))
60            }
61            
62            // Store operation info
63            self.burnOperations.append({
64                "collectionRef": collectionRef!,
65                "nftIDs": nftIDsForAddress,
66                "address": targetAddress.toString(),
67                "isChild": isChildAccount
68            })
69            
70            i = i + 1
71        }
72    }
73
74    execute {
75        // Burn each NFT using the Burner contract
76        var i = 0
77        while i < self.burnOperations.length {
78            let operation = self.burnOperations[i]!
79            let collectionRef = operation["collectionRef"]! as! auth(NonFungibleToken.Withdraw) &{NonFungibleToken.Collection}
80            let nftIDsForOperation = operation["nftIDs"]! as! [UInt64]
81            
82            for nftId in nftIDsForOperation {
83                // Withdraw the NFT from the collection
84                let nft <- collectionRef.withdraw(withdrawID: nftId)
85
86                // Burn the NFT using the Burner contract
87                Burner.burn(<-nft)
88            }
89            i = i + 1
90        }
91    }
92}