spb/os-vault Public

1import Foundation23public enum LookUpTableProgram {4    public static var id: PublicKey {5        "AddressLookupTab1e1111111111111111111111111"6    }78    public static func createLookupTable(9        authority: PublicKey,10        payer: PublicKey,11        recentSlot: UInt6412    ) throws -> (TransactionInstruction, PublicKey) {13        let (lookupTableAddress, bump) = try PublicKey.findProgramAddress(14            seeds: [15                authority.data,16                Data(recentSlot.bytes),17            ],18            programId: id19        )2021        return (22            TransactionInstruction(23                keys: [24                    .init(publicKey: lookupTableAddress, isSigner: false, isWritable: true),25                    .init(publicKey: authority, isSigner: true, isWritable: false),26                    .init(publicKey: payer, isSigner: true, isWritable: true),27                    .init(publicKey: SystemProgram.id, isSigner: false, isWritable: false),28                ],29                programId: id,30                data: [31                    UInt32(0),32                    recentSlot,33                    bump,34                ]35            ),36            lookupTableAddress37        )38    }3940    public static func extendLookupTable(41        lookupTable: PublicKey,42        authority: PublicKey,43        payer: PublicKey?,44        addresses: [PublicKey]45    ) -> TransactionInstruction {46        var keys: [AccountMeta] = [47            .init(publicKey: lookupTable, isSigner: false, isWritable: true),48            .init(publicKey: authority, isSigner: true, isWritable: false),49        ]5051        if let payer = payer {52            keys.append(contentsOf: [53                .init(publicKey: payer, isSigner: true, isWritable: true),54                .init(publicKey: SystemProgram.id, isSigner: false, isWritable: false),55            ])56        }5758        return TransactionInstruction(59            keys: keys,60            programId: id,61            data: [62                UInt32(2),63                UInt64(addresses.count),64                addresses.map { $0.bytes }.reduce([], +),65            ]66        )67    }6869    public static func closeLookupTable(70        lookupTable: PublicKey,71        authority: PublicKey,72        recipient: PublicKey73    ) -> TransactionInstruction {74        return TransactionInstruction(75            keys: [76                .init(publicKey: lookupTable, isSigner: false, isWritable: true),77                .init(publicKey: authority, isSigner: true, isWritable: false),78                .init(publicKey: recipient, isSigner: false, isWritable: true),79            ],80            programId: id,81            data: [UInt32(4)]82        )83    }84}85