- add new walletCache function to migrate ledgers to new UUID

- add new test

Sources/KukaiCoreSwift/Services/WalletCacheService.swift

@@ -292,6 +292,29 @@ public class WalletCacheService {
 		return cacheItems[address]
 	}
 
+	/**
+	 Migrate a LedgerWallet and its children to a new physical device, denoted by a new UUID
+	 */
+	public func migrateLedger(metadata: WalletMetadata, toNewUUID: String) -> Bool {
+		guard let cacheItems = readWalletsFromDiskAndDecrypt() else {
+			Logger.walletCache.error("Unable to read wallet items")
+			return false
+		}
+
+		var addressesToMigrate = [metadata.address]
+		addressesToMigrate.append(contentsOf: metadata.children.map({ $0.address }))
+
+		for address in addressesToMigrate {
+			guard let ledgerWallet = cacheItems[address] as? LedgerWallet else {
+				return false
+			}
+
+			ledgerWallet.ledgerUUID = toNewUUID
+		}
+
+		return encryptAndWriteWalletsToDisk(wallets: cacheItems)
+	}
+
 	/**
 	 Delete the cached files and the assoicate keys used to encrypt it
 	 - Returns: Bool, indicating if the process was successful or not

Tests/KukaiCoreSwiftTests/Services/WalletCacheServiceTests.swift

@@ -427,4 +427,39 @@ class WalletCacheServiceTests: XCTestCase {
 			XCTFail("Should not error: \(error)")
 		}
 	}
+
+	func testLedgerWalletMigrate() {
+		XCTAssert(walletCacheService.deleteAllCacheAndKeys())
+
+		let ledgerWallet = LedgerWallet(address: "tz1abc", publicKey: "edpks1234", derivationPath: HD.defaultDerivationPath, curve: .ed25519, ledgerUUID: "blah1")!
+		let ledgerWalletChild1 = LedgerWallet(address: "tz1def", publicKey: "edpks1234", derivationPath: HD.defaultDerivationPath, curve: .ed25519, ledgerUUID: "blah1")!
+		let ledgerWalletChild2 = LedgerWallet(address: "tz1ghi", publicKey: "edpks1234", derivationPath: HD.defaultDerivationPath, curve: .ed25519, ledgerUUID: "blah1")!
+
+		do {
+			try walletCacheService.cache(wallet: ledgerWallet, childOfIndex: nil, backedUp: true)
+			try walletCacheService.cache(wallet: ledgerWalletChild1, childOfIndex: 0, backedUp: true)
+			try walletCacheService.cache(wallet: ledgerWalletChild2, childOfIndex: 0, backedUp: true)
+
+			let list = walletCacheService.readMetadataFromDiskAndDecrypt()
+			guard let ledger = list.ledgerWallets.first else {
+				XCTFail("Ledger list empty")
+				return
+			}
+
+			XCTAssert(walletCacheService.migrateLedger(metadata: ledger, toNewUUID: "migrated"))
+
+			let ledgerParent = walletCacheService.fetchWallet(forAddress: ledgerWallet.address) as? LedgerWallet
+			XCTAssert(ledgerParent?.ledgerUUID == "migrated")
+
+			let ledgerChild1 = walletCacheService.fetchWallet(forAddress: ledgerWalletChild1.address) as? LedgerWallet
+			XCTAssert(ledgerChild1?.ledgerUUID == "migrated")
+
+			let ledgerChild2 = walletCacheService.fetchWallet(forAddress: ledgerWalletChild2.address) as? LedgerWallet
+			XCTAssert(ledgerChild2?.ledgerUUID == "migrated")
+
+
+		} catch let error {
+			XCTFail("Should not error: \(error)")
+		}
+	}
 }