797 lines
26 KiB
Swift
797 lines
26 KiB
Swift
//
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// ZcashRustBackend.swift
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// ZcashLightClientKit
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//
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// Created by Jack Grigg on 5/8/19.
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// Copyright © 2019 Electric Coin Company. All rights reserved.
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//
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// swiftlint:disable type_body_length
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import Foundation
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import libzcashlc
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class ZcashRustBackend: ZcashRustBackendWelding {
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static let minimumConfirmations: UInt32 = 10
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static let useZIP317Fees = false
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static func createAccount(dbData: URL, seed: [UInt8], networkType: NetworkType) throws -> UnifiedSpendingKey {
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let dbData = dbData.osStr()
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guard let ffiBinaryKeyPtr = zcashlc_create_account(
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dbData.0,
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dbData.1,
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seed,
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UInt(seed.count),
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networkType.networkId
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) else {
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throw lastError() ?? .genericError(message: "No error message available")
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}
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defer { zcashlc_free_binary_key(ffiBinaryKeyPtr) }
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return ffiBinaryKeyPtr.pointee.unsafeToUnifiedSpendingKey(network: networkType)
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}
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// swiftlint:disable function_parameter_count
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static func createToAddress(
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dbData: URL,
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usk: UnifiedSpendingKey,
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to address: String,
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value: Int64,
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memo: MemoBytes?,
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spendParamsPath: String,
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outputParamsPath: String,
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networkType: NetworkType
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) -> Int64 {
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let dbData = dbData.osStr()
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return usk.bytes.withUnsafeBufferPointer { uskPtr in
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zcashlc_create_to_address(
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dbData.0,
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dbData.1,
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uskPtr.baseAddress,
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UInt(usk.bytes.count),
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[CChar](address.utf8CString),
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value,
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memo?.bytes,
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spendParamsPath,
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UInt(spendParamsPath.lengthOfBytes(using: .utf8)),
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outputParamsPath,
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UInt(outputParamsPath.lengthOfBytes(using: .utf8)),
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networkType.networkId,
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minimumConfirmations,
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useZIP317Fees
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)
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}
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}
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static func decryptAndStoreTransaction(dbData: URL, txBytes: [UInt8], minedHeight: Int32, networkType: NetworkType) -> Bool {
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let dbData = dbData.osStr()
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return zcashlc_decrypt_and_store_transaction(
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dbData.0,
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dbData.1,
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txBytes,
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UInt(txBytes.count),
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UInt32(minedHeight),
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networkType.networkId
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) != 0
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}
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static func deriveUnifiedSpendingKey(
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from seed: [UInt8],
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accountIndex: Int32,
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networkType: NetworkType
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) throws -> UnifiedSpendingKey {
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let binaryKeyPtr = seed.withUnsafeBufferPointer { seedBufferPtr in
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return zcashlc_derive_spending_key(
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seedBufferPtr.baseAddress,
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UInt(seed.count),
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accountIndex,
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networkType.networkId
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)
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}
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defer { zcashlc_free_binary_key(binaryKeyPtr) }
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guard let binaryKey = binaryKeyPtr?.pointee else {
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throw lastError() ?? .genericError(message: "No error message available")
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}
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return binaryKey.unsafeToUnifiedSpendingKey(network: networkType)
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}
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static func getBalance(dbData: URL, account: Int32, networkType: NetworkType) throws -> Int64 {
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let dbData = dbData.osStr()
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let balance = zcashlc_get_balance(dbData.0, dbData.1, account, networkType.networkId)
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guard balance >= 0 else {
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throw throwBalanceError(account: account, lastError(), fallbackMessage: "Error getting total balance from account \(account)")
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}
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return balance
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}
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static func getCurrentAddress(
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dbData: URL,
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account: Int32,
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networkType: NetworkType
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) throws -> UnifiedAddress {
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let dbData = dbData.osStr()
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guard let addressCStr = zcashlc_get_current_address(
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dbData.0,
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dbData.1,
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account,
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networkType.networkId
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) else {
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throw lastError() ?? .genericError(message: "No error message available")
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}
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defer { zcashlc_string_free(addressCStr) }
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guard let address = String(validatingUTF8: addressCStr) else {
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throw RustWeldingError.unableToDeriveKeys
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}
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return UnifiedAddress(validatedEncoding: address)
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}
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static func getNearestRewindHeight(
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dbData: URL,
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height: Int32,
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networkType: NetworkType
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) -> Int32 {
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let dbData = dbData.osStr()
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return zcashlc_get_nearest_rewind_height(
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dbData.0,
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dbData.1,
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height,
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networkType.networkId
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)
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}
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static func getNextAvailableAddress(
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dbData: URL,
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account: Int32,
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networkType: NetworkType
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) throws -> UnifiedAddress {
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let dbData = dbData.osStr()
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guard let addressCStr = zcashlc_get_next_available_address(
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dbData.0,
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dbData.1,
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account,
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networkType.networkId
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) else {
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throw lastError() ?? .genericError(message: "No error message available")
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}
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defer { zcashlc_string_free(addressCStr) }
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guard let address = String(validatingUTF8: addressCStr) else {
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throw RustWeldingError.unableToDeriveKeys
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}
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return UnifiedAddress(validatedEncoding: address)
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}
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@available(*, deprecated, message: "This function will be deprecated soon. Use `getReceivedMemo(dbData:idNote:networkType)` instead")
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static func getReceivedMemoAsUTF8(dbData: URL, idNote: Int64, networkType: NetworkType) -> String? {
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let dbData = dbData.osStr()
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guard let memoCStr = zcashlc_get_received_memo_as_utf8(
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dbData.0,
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dbData.1,
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idNote,
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networkType.networkId
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) else { return nil }
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defer {
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zcashlc_string_free(memoCStr)
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}
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return String(validatingUTF8: memoCStr)
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}
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static func getReceivedMemo(
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dbData: URL,
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idNote: Int64,
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networkType: NetworkType
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) -> Memo? {
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let dbData = dbData.osStr()
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var contiguousMemoBytes = ContiguousArray<UInt8>(MemoBytes.empty().bytes)
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var success = false
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contiguousMemoBytes.withUnsafeMutableBufferPointer { memoBytePtr in
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success = zcashlc_get_received_memo(dbData.0, dbData.1, idNote, memoBytePtr.baseAddress, networkType.networkId)
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}
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guard success else { return nil }
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return (try? MemoBytes(contiguousBytes: contiguousMemoBytes)).flatMap { try? $0.intoMemo() }
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}
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static func getSaplingReceiver(for uAddr: UnifiedAddress) throws -> SaplingAddress? {
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guard let saplingCStr = zcashlc_get_sapling_receiver_for_unified_address(
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[CChar](uAddr.encoding.utf8CString)
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) else {
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throw KeyDerivationErrors.invalidUnifiedAddress
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}
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defer { zcashlc_string_free(saplingCStr) }
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guard let saplingReceiverStr = String(validatingUTF8: saplingCStr) else {
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throw KeyDerivationErrors.receiverNotFound
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}
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return SaplingAddress(validatedEncoding: saplingReceiverStr)
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}
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@available(*, deprecated, message: "This function will be deprecated soon. Use `getSentMemo(dbData:idNote:networkType)` instead")
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static func getSentMemoAsUTF8(
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dbData: URL,
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idNote: Int64,
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networkType: NetworkType
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) -> String? {
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let dbData = dbData.osStr()
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guard let memoCStr = zcashlc_get_sent_memo_as_utf8(dbData.0, dbData.1, idNote, networkType.networkId) else { return nil }
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defer {
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zcashlc_string_free(memoCStr)
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}
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return String(validatingUTF8: memoCStr)
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}
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static func getSentMemo(
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dbData: URL,
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idNote: Int64,
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networkType: NetworkType
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) -> Memo? {
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let dbData = dbData.osStr()
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var contiguousMemoBytes = ContiguousArray<UInt8>(MemoBytes.empty().bytes)
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var success = false
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contiguousMemoBytes.withUnsafeMutableBytes{ memoBytePtr in
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success = zcashlc_get_sent_memo(dbData.0, dbData.1, idNote, memoBytePtr.baseAddress, networkType.networkId)
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}
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guard success else { return nil }
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return (try? MemoBytes(contiguousBytes: contiguousMemoBytes)).flatMap { try? $0.intoMemo() }
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}
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static func getTransparentBalance(
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dbData: URL,
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account: Int32,
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networkType: NetworkType
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) throws -> Int64 {
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guard account >= 0 else {
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throw RustWeldingError.invalidInput(message: "Account index must be non-negative")
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}
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let dbData = dbData.osStr()
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let balance = zcashlc_get_total_transparent_balance_for_account(
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dbData.0,
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dbData.1,
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networkType.networkId,
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account
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)
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guard balance >= 0 else {
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throw throwBalanceError(account: account, lastError(), fallbackMessage: "Error getting Total Transparent balance from account \(account)")
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}
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return balance
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}
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static func getVerifiedBalance(dbData: URL, account: Int32, networkType: NetworkType) throws -> Int64 {
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let dbData = dbData.osStr()
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let balance = zcashlc_get_verified_balance(
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dbData.0,
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dbData.1,
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account,
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networkType.networkId,
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minimumConfirmations
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)
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guard balance >= 0 else {
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throw throwBalanceError(account: account, lastError(), fallbackMessage: "Error getting verified balance from account \(account)")
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}
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return balance
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}
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static func getVerifiedTransparentBalance(
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dbData: URL,
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account: Int32,
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networkType: NetworkType
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) throws -> Int64 {
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guard account >= 0 else {
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throw RustWeldingError.invalidInput(message: "`account` must be non-negative")
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}
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let dbData = dbData.osStr()
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let balance = zcashlc_get_verified_transparent_balance_for_account(
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dbData.0,
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dbData.1,
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networkType.networkId,
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account,
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minimumConfirmations
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)
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guard balance >= 0 else {
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throw throwBalanceError(account: account, lastError(), fallbackMessage: "Error getting verified transparent balance from account \(account)")
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}
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return balance
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}
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static func lastError() -> RustWeldingError? {
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defer { zcashlc_clear_last_error() }
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guard let message = getLastError() else {
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return nil
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}
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if message.contains("couldn't load Sapling spend parameters") {
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return RustWeldingError.saplingSpendParametersNotFound
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} else if message.contains("is not empty") {
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return RustWeldingError.dataDbNotEmpty
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}
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return RustWeldingError.genericError(message: message)
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}
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static func getAddressMetadata(_ address: String) -> AddressMetadata? {
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var networkId: UInt32 = 0
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var addrId: UInt32 = 0
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guard zcashlc_get_address_metadata(
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[CChar](address.utf8CString),
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&networkId,
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&addrId
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) else {
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return nil
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}
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guard let network = NetworkType.forNetworkId(networkId),
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let addrType = AddressType.forId(addrId)
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else {
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return nil
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}
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return AddressMetadata(network: network, addrType: addrType)
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}
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static func getTransparentReceiver(for uAddr: UnifiedAddress) throws -> TransparentAddress? {
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guard let transparentCStr = zcashlc_get_transparent_receiver_for_unified_address(
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[CChar](uAddr.encoding.utf8CString)
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) else {
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throw KeyDerivationErrors.invalidUnifiedAddress
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}
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defer { zcashlc_string_free(transparentCStr) }
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guard let transparentReceiverStr = String(validatingUTF8: transparentCStr) else {
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throw KeyDerivationErrors.receiverNotFound
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}
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return TransparentAddress(validatedEncoding: transparentReceiverStr)
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}
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static func getLastError() -> String? {
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let errorLen = zcashlc_last_error_length()
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if errorLen > 0 {
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let error = UnsafeMutablePointer<Int8>.allocate(capacity: Int(errorLen))
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zcashlc_error_message_utf8(error, errorLen)
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zcashlc_clear_last_error()
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return String(validatingUTF8: error)
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} else {
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return nil
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}
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}
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static func initDataDb(dbData: URL, seed: [UInt8]?, networkType: NetworkType) throws -> DbInitResult {
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let dbData = dbData.osStr()
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switch zcashlc_init_data_database(dbData.0, dbData.1, seed, UInt(seed?.count ?? 0), networkType.networkId) {
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case 0: //ok
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return DbInitResult.success
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case 1:
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return DbInitResult.seedRequired
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default:
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throw throwDataDbError(lastError() ?? .genericError(message: "No error message found"))
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}
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}
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static func isValidSaplingAddress(_ address: String, networkType: NetworkType) -> Bool {
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guard !address.containsCStringNullBytesBeforeStringEnding() else {
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return false
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}
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return zcashlc_is_valid_shielded_address([CChar](address.utf8CString), networkType.networkId)
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}
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static func isValidTransparentAddress(_ address: String, networkType: NetworkType) -> Bool {
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guard !address.containsCStringNullBytesBeforeStringEnding() else {
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return false
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}
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return zcashlc_is_valid_transparent_address([CChar](address.utf8CString), networkType.networkId)
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}
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static func isValidSaplingExtendedFullViewingKey(_ key: String, networkType: NetworkType) -> Bool {
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guard !key.containsCStringNullBytesBeforeStringEnding() else {
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return false
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}
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return zcashlc_is_valid_viewing_key([CChar](key.utf8CString), networkType.networkId)
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}
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static func isValidSaplingExtendedSpendingKey(_ key: String, networkType: NetworkType) -> Bool {
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guard !key.containsCStringNullBytesBeforeStringEnding() else {
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return false
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}
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return zcashlc_is_valid_sapling_extended_spending_key([CChar](key.utf8CString), networkType.networkId)
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}
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static func isValidUnifiedAddress(_ address: String, networkType: NetworkType) -> Bool {
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guard !address.containsCStringNullBytesBeforeStringEnding() else {
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return false
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}
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return zcashlc_is_valid_unified_address([CChar](address.utf8CString), networkType.networkId)
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}
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static func isValidUnifiedFullViewingKey(_ key: String, networkType: NetworkType) -> Bool {
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guard !key.containsCStringNullBytesBeforeStringEnding() else {
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return false
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}
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return zcashlc_is_valid_unified_full_viewing_key([CChar](key.utf8CString), networkType.networkId)
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}
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static func initAccountsTable(
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dbData: URL,
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ufvks: [UnifiedFullViewingKey],
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networkType: NetworkType
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) throws {
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let dbData = dbData.osStr()
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var ffiUfvks = [FFIEncodedKey]()
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for ufvk in ufvks {
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guard !ufvk.encoding.containsCStringNullBytesBeforeStringEnding() else {
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throw RustWeldingError.invalidInput(message: "`UFVK` contains null bytes.")
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}
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guard self.isValidUnifiedFullViewingKey(ufvk.encoding, networkType: networkType) else {
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throw RustWeldingError.invalidInput(message: "UFVK is invalid.")
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}
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let ufvkCStr = [CChar](String(ufvk.encoding).utf8CString)
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let ufvkPtr = UnsafeMutablePointer<CChar>.allocate(capacity: ufvkCStr.count)
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ufvkPtr.initialize(from: ufvkCStr, count: ufvkCStr.count)
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ffiUfvks.append(
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FFIEncodedKey(account_id: ufvk.account, encoding: ufvkPtr)
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)
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}
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var contiguousUVKs = ContiguousArray(ffiUfvks)
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var result = false
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contiguousUVKs.withContiguousMutableStorageIfAvailable { ufvksPtr in
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result = zcashlc_init_accounts_table_with_keys(
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dbData.0,
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dbData.1,
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ufvksPtr.baseAddress,
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UInt(ufvks.count),
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networkType.networkId
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)
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}
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defer {
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for ufvk in ffiUfvks {
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ufvk.encoding.deallocate()
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}
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}
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guard result else {
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throw lastError() ?? .genericError(message: "`initAccountsTable` failed with unknown error")
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}
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}
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// swiftlint:disable function_parameter_count
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static func initBlocksTable(
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dbData: URL,
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height: Int32,
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hash: String,
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time: UInt32,
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saplingTree: String,
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networkType: NetworkType
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) throws {
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let dbData = dbData.osStr()
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guard !hash.containsCStringNullBytesBeforeStringEnding() else {
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throw RustWeldingError.invalidInput(message: "`hash` contains null bytes.")
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}
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guard !saplingTree.containsCStringNullBytesBeforeStringEnding() else {
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throw RustWeldingError.invalidInput(message: "`saplingTree` contains null bytes.")
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}
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guard zcashlc_init_blocks_table(
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dbData.0,
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dbData.1,
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height,
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[CChar](hash.utf8CString),
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time,
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[CChar](saplingTree.utf8CString),
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networkType.networkId
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) != 0 else {
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throw lastError() ?? .genericError(message: "No error message available")
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}
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}
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static func listTransparentReceivers(
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dbData: URL,
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account: Int32,
|
|
networkType: NetworkType
|
|
) throws -> [TransparentAddress] {
|
|
let dbData = dbData.osStr()
|
|
|
|
guard let encodedKeysPtr = zcashlc_list_transparent_receivers(
|
|
dbData.0,
|
|
dbData.1,
|
|
account,
|
|
networkType.networkId
|
|
) else {
|
|
throw lastError() ?? .genericError(message: "No error message available")
|
|
}
|
|
|
|
defer { zcashlc_free_keys(encodedKeysPtr) }
|
|
|
|
var addresses = [TransparentAddress]()
|
|
|
|
for i in (0 ..< Int(encodedKeysPtr.pointee.len)) {
|
|
let key = encodedKeysPtr.pointee.ptr.advanced(by: i).pointee
|
|
|
|
guard let taddrStr = String(validatingUTF8: key.encoding) else {
|
|
throw RustWeldingError.unableToDeriveKeys
|
|
}
|
|
|
|
addresses.append(
|
|
TransparentAddress(validatedEncoding: taddrStr)
|
|
)
|
|
}
|
|
|
|
return addresses
|
|
}
|
|
|
|
static func putUnspentTransparentOutput(dbData: URL, txid: [UInt8], index: Int, script: [UInt8], value: Int64, height: BlockHeight, networkType: NetworkType) throws -> Bool {
|
|
let dbData = dbData.osStr()
|
|
|
|
guard zcashlc_put_utxo(
|
|
dbData.0,
|
|
dbData.1,
|
|
txid,
|
|
UInt(txid.count),
|
|
Int32(index),
|
|
script,
|
|
UInt(script.count),
|
|
value,
|
|
Int32(height),
|
|
networkType.networkId
|
|
) else {
|
|
throw lastError() ?? .genericError(message: "No error message available")
|
|
}
|
|
|
|
return true
|
|
}
|
|
|
|
static func validateCombinedChain(dbCache: URL, dbData: URL, networkType: NetworkType) -> Int32 {
|
|
let dbCache = dbCache.osStr()
|
|
let dbData = dbData.osStr()
|
|
return zcashlc_validate_combined_chain(dbCache.0, dbCache.1, dbData.0, dbData.1, networkType.networkId)
|
|
}
|
|
|
|
static func rewindToHeight(dbData: URL, height: Int32, networkType: NetworkType) -> Bool {
|
|
let dbData = dbData.osStr()
|
|
return zcashlc_rewind_to_height(dbData.0, dbData.1, height, networkType.networkId)
|
|
}
|
|
|
|
static func scanBlocks(dbCache: URL, dbData: URL, limit: UInt32 = 0, networkType: NetworkType) -> Bool {
|
|
let dbCache = dbCache.osStr()
|
|
let dbData = dbData.osStr()
|
|
return zcashlc_scan_blocks(dbCache.0, dbCache.1, dbData.0, dbData.1, limit, networkType.networkId) != 0
|
|
}
|
|
|
|
static func shieldFunds(
|
|
dbCache: URL,
|
|
dbData: URL,
|
|
usk: UnifiedSpendingKey,
|
|
memo: MemoBytes?,
|
|
spendParamsPath: String,
|
|
outputParamsPath: String,
|
|
networkType: NetworkType
|
|
) -> Int64 {
|
|
let dbData = dbData.osStr()
|
|
|
|
return usk.bytes.withUnsafeBufferPointer { uskBuffer in
|
|
zcashlc_shield_funds(
|
|
dbData.0,
|
|
dbData.1,
|
|
uskBuffer.baseAddress,
|
|
UInt(usk.bytes.count),
|
|
memo?.bytes,
|
|
spendParamsPath,
|
|
UInt(spendParamsPath.lengthOfBytes(using: .utf8)),
|
|
outputParamsPath,
|
|
UInt(outputParamsPath.lengthOfBytes(using: .utf8)),
|
|
networkType.networkId,
|
|
useZIP317Fees
|
|
)
|
|
}
|
|
}
|
|
|
|
static func deriveUnifiedFullViewingKey(from spendingKey: UnifiedSpendingKey, networkType: NetworkType) throws -> UnifiedFullViewingKey {
|
|
|
|
let extfvk = try spendingKey.bytes.withUnsafeBufferPointer { uskBufferPtr -> UnsafeMutablePointer<CChar> in
|
|
guard let extfvk = zcashlc_spending_key_to_full_viewing_key(
|
|
uskBufferPtr.baseAddress,
|
|
UInt(spendingKey.bytes.count),
|
|
networkType.networkId
|
|
) else {
|
|
throw lastError() ?? .genericError(message: "No error message available")
|
|
}
|
|
|
|
return extfvk
|
|
}
|
|
|
|
defer { zcashlc_string_free(extfvk) }
|
|
|
|
guard let derived = String(validatingUTF8: extfvk) else {
|
|
throw RustWeldingError.unableToDeriveKeys
|
|
}
|
|
|
|
return UnifiedFullViewingKey(validatedEncoding: derived, account: spendingKey.account)
|
|
}
|
|
|
|
|
|
static func receiverTypecodesOnUnifiedAddress(_ address: String) throws -> [UInt32] {
|
|
guard !address.containsCStringNullBytesBeforeStringEnding() else {
|
|
throw RustWeldingError.invalidInput(message: "`address` contains null bytes.")
|
|
}
|
|
|
|
var len = UInt(0)
|
|
|
|
guard let typecodesPointer = zcashlc_get_typecodes_for_unified_address_receivers(
|
|
[CChar](address.utf8CString),
|
|
&len
|
|
),
|
|
len > 0
|
|
else {
|
|
throw RustWeldingError.malformedStringInput
|
|
}
|
|
|
|
var typecodes = [UInt32]()
|
|
|
|
for typecodeIndex in 0 ..< Int(len) {
|
|
let pointer = typecodesPointer.advanced(by: typecodeIndex)
|
|
|
|
typecodes.append(pointer.pointee)
|
|
}
|
|
|
|
defer {
|
|
zcashlc_free_typecodes(typecodesPointer, len)
|
|
}
|
|
|
|
return typecodes
|
|
}
|
|
|
|
static func consensusBranchIdFor(height: Int32, networkType: NetworkType) throws -> Int32 {
|
|
let branchId = zcashlc_branch_id_for_height(height, networkType.networkId)
|
|
|
|
guard branchId != -1 else {
|
|
throw RustWeldingError.noConsensusBranchId(height: height)
|
|
}
|
|
|
|
return branchId
|
|
}
|
|
}
|
|
|
|
private extension ZcashRustBackend {
|
|
static func throwDataDbError(_ error: RustWeldingError) -> Error {
|
|
if case RustWeldingError.genericError(let message) = error, message.contains("is not empty") {
|
|
return RustWeldingError.dataDbNotEmpty
|
|
}
|
|
|
|
return RustWeldingError.dataDbInitFailed(message: error.localizedDescription)
|
|
}
|
|
|
|
static func throwBalanceError(account: Int32, _ error: RustWeldingError?, fallbackMessage: String) -> Error {
|
|
guard let balanceError = error else {
|
|
return RustWeldingError.genericError(message: fallbackMessage)
|
|
}
|
|
|
|
return RustWeldingError.getBalanceError(Int(account), balanceError)
|
|
}
|
|
}
|
|
|
|
private extension URL {
|
|
func osStr() -> (String, UInt) {
|
|
let path = self.absoluteString
|
|
return (path, UInt(path.lengthOfBytes(using: .utf8)))
|
|
}
|
|
}
|
|
|
|
extension String {
|
|
/**
|
|
Checks whether this string contains null bytes before it's real ending
|
|
*/
|
|
func containsCStringNullBytesBeforeStringEnding() -> Bool {
|
|
self.utf8CString.firstIndex(of: 0) != (self.utf8CString.count - 1)
|
|
}
|
|
}
|
|
|
|
extension FFIBinaryKey {
|
|
/// converts an [`FFIBinaryKey`] into a [`UnifiedSpendingKey`]
|
|
/// - Note: This does not check that the converted value actually holds a valid USK
|
|
func unsafeToUnifiedSpendingKey(network: NetworkType) -> UnifiedSpendingKey {
|
|
.init(
|
|
network: network,
|
|
bytes: self.encoding.toByteArray(
|
|
length: Int(self.encoding_len)),
|
|
account: self.account_id
|
|
)
|
|
}
|
|
}
|
|
|
|
extension UnsafeMutablePointer where Pointee == UInt8 {
|
|
/// copies the bytes pointed on
|
|
func toByteArray(length: Int) -> [UInt8] {
|
|
var bytes = [UInt8]()
|
|
|
|
for index in 0 ..< length {
|
|
bytes.append(self.advanced(by: index).pointee)
|
|
}
|
|
|
|
return bytes
|
|
}
|
|
}
|
|
|
|
|
|
extension RustWeldingError: LocalizedError {
|
|
var errorDescription: String? {
|
|
switch self {
|
|
case .genericError(let message):
|
|
return "RustWeldingError generic error: \(message)"
|
|
case .dataDbInitFailed(let message):
|
|
return "`RustWeldingError.dataDbInitFailed` with message: \(message)"
|
|
case .dataDbNotEmpty:
|
|
return "`.DataDbNotEmpty`. This is usually not an error."
|
|
case .invalidInput(let message):
|
|
return "`RustWeldingError.invalidInput` with message: \(message)"
|
|
case .malformedStringInput:
|
|
return "`.malformedStringInput` Called a function with a malformed string input."
|
|
case .invalidRewind:
|
|
return "`.invalidRewind` called the rewind API with an arbitrary height that is not valid."
|
|
case .noConsensusBranchId(let branchId):
|
|
return "`.noConsensusBranchId` number \(branchId)"
|
|
case .saplingSpendParametersNotFound:
|
|
return "`.saplingSpendParametersNotFound` sapling parameters not present at specified URL"
|
|
case .unableToDeriveKeys:
|
|
return "`.unableToDeriveKeys` the requested keys could not be derived from the source provided"
|
|
case .getBalanceError(let account, let error):
|
|
return "`.getBalanceError` could not retrieve balance from account: \(account), error:\(error)"
|
|
}
|
|
}
|
|
}
|