import MetadataViews from 0x1d7e57aa55817448 import ViewResolver from 0x1d7e57aa55817448 import NonFungibleToken from 0x1d7e57aa55817448 import FungibleToken from 0xf233dcee88fe0abe import FlowToken from 0x1654653399040a61 import FungibleTokenMetadataViews from 0xf233dcee88fe0abe import ScopedFTProviders from 0x1e4aa0b87d10b141 import EVM from 0xe467b9dd11fa00df import FlowEVMBridgeUtils from 0x1e4aa0b87d10b141 import FlowEVMBridge from 0x1e4aa0b87d10b141 import FlowEVMBridgeConfig from 0x1e4aa0b87d10b141 import HybridCustody from 0xd8a7e05a7ac670c0 import CapabilityFilter from 0xd8a7e05a7ac670c0 transaction(nftIdentifier: String, child: Address, ids: [UInt256]) { prepare(signer: auth(BorrowValue, CopyValue, IssueStorageCapabilityController, PublishCapability, SaveValue, UnpublishCapability) &Account) { /* --- Reference the signer's CadenceOwnedAccount --- */ // // Borrow a reference to the signer's COA let coa = signer.storage.borrow(from: /storage/evm) ?? panic("Could not borrow COA from provided gateway address") // Construct the NFT type from the provided identifier let nftType = CompositeType(nftIdentifier) ?? panic("Could not construct NFT type from identifier: ".concat(nftIdentifier)) let nftContractAddress = FlowEVMBridgeUtils.getContractAddress(fromType: nftType) ?? panic("Could not get contract address from identifier: ".concat(nftIdentifier)) let nftContractName = FlowEVMBridgeUtils.getContractName(fromType: nftType) ?? panic("Could not get contract name from identifier: ".concat(nftIdentifier)) let m = signer.storage.borrow(from: HybridCustody.ManagerStoragePath) ?? panic("manager does not exist") let childAcct = m.borrowAccount(addr: child) ?? panic("child account not found") /* --- Retrieve the NFT --- */ // // Borrow a reference to the NFT collection, configuring if necessary let viewResolver = getAccount(nftContractAddress).contracts.borrow<&{ViewResolver}>(name: nftContractName) ?? panic("Could not borrow ViewResolver from NFT contract") let collectionData = viewResolver.resolveContractView( resourceType: nil, viewType: Type() ) as! MetadataViews.NFTCollectionData? ?? panic("Could not resolve NFTCollectionData view") let receiver = getAccount(child).capabilities.borrow<&{NonFungibleToken.Receiver}>(collectionData.publicPath) ?? panic("Could not borrow Receiver from recipient's public capability path") let capType = Type<&{NonFungibleToken.CollectionPublic}>() let controllerID = childAcct.getControllerIDForType(type: capType, forPath: collectionData.storagePath) ?? panic("no controller found for capType") let cap = childAcct.getCapability(controllerID: controllerID, type: capType) ?? panic("no cap found") let publicCap = cap as! Capability<&{NonFungibleToken.CollectionPublic}> assert(publicCap.check(), message: "invalid public capability") // Get a reference to the child's stored vault let collectionRef = publicCap.borrow()! // // Withdraw tokens from the signer's stored vault let approxFee = FlowEVMBridgeUtils.calculateBridgeFee(bytes: 0) /* --- Configure a ScopedFTProvider --- */ // // Issue and store bridge-dedicated Provider Capability in storage if necessary if signer.storage.type(at: FlowEVMBridgeConfig.providerCapabilityStoragePath) == nil { let providerCap = signer.capabilities.storage.issue( /storage/flowTokenVault ) signer.storage.save(providerCap, to: FlowEVMBridgeConfig.providerCapabilityStoragePath) } // Copy the stored Provider capability and create a ScopedFTProvider let providerCapCopy = signer.storage.copy>( from: FlowEVMBridgeConfig.providerCapabilityStoragePath ) ?? panic("Invalid Provider Capability found in storage.") let providerFilter = ScopedFTProviders.AllowanceFilter(approxFee) let scopedProvider <- ScopedFTProviders.createScopedFTProvider( provider: providerCapCopy, filters: [ providerFilter ], expiration: getCurrentBlock().timestamp + 1.0 ) for id in ids { let nft: @{NonFungibleToken.NFT} <- coa.withdrawNFT( type: nftType, id: id, feeProvider: &scopedProvider as auth(FungibleToken.Withdraw) &{FungibleToken.Provider} ) assert( nft.getType() == nftType, message: "Bridged nft type mismatch - requeswted: ".concat(nftType.identifier) .concat(", received: ").concat(nft.getType().identifier) ) collectionRef.deposit(token: <- nft) } // Destroy the ScopedFTProvider destroy scopedProvider } }

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Transaction

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