114 lines
4.0 KiB
Swift
114 lines
4.0 KiB
Swift
//
|
|
// WalletBirthday+Constants.swift
|
|
// ZcashLightClientKit
|
|
//
|
|
// Created by Francisco Gindre on 7/28/21.
|
|
//
|
|
|
|
import Foundation
|
|
|
|
public extension WalletBirthday {
|
|
static func birthday(with height: BlockHeight, network: ZcashNetwork) -> WalletBirthday {
|
|
let checkpointDirectoryURL = BundleCheckpointURLProvider.default.url(network.networkType)
|
|
|
|
switch network.networkType {
|
|
case .mainnet:
|
|
return birthday(with: height, checkpointDirectory: checkpointDirectoryURL) ?? .mainnetMin
|
|
case .testnet:
|
|
return birthday(with: height, checkpointDirectory: checkpointDirectoryURL) ?? .testnetMin
|
|
}
|
|
}
|
|
}
|
|
|
|
extension WalletBirthday {
|
|
static func birthday(with height: BlockHeight, checkpointDirectory: URL) -> WalletBirthday? {
|
|
return bestCheckpointHeight(for: height, checkpointDirectory: checkpointDirectory)
|
|
.flatMap { checkpoint(height: $0, directory: checkpointDirectory) }
|
|
}
|
|
|
|
private static func bestCheckpointHeight(for height: BlockHeight, checkpointDirectory: URL) -> Int? {
|
|
guard let checkPointURLs = try? FileManager.default.contentsOfDirectory(
|
|
at: checkpointDirectory,
|
|
includingPropertiesForKeys: nil,
|
|
options: .skipsHiddenFiles
|
|
) else {
|
|
return nil
|
|
}
|
|
|
|
return checkPointURLs
|
|
.map { $0.deletingPathExtension() }
|
|
.map(\.lastPathComponent)
|
|
.compactMap(Int.init)
|
|
.filter { $0 <= height }
|
|
.sorted()
|
|
.last
|
|
}
|
|
|
|
private static func checkpoint(height: BlockHeight, directory checkpointDirectory: URL) -> WalletBirthday? {
|
|
let url = checkpointDirectory
|
|
.appendingPathComponent(String(height))
|
|
.appendingPathExtension("json")
|
|
|
|
return try? checkpoint(at: url)
|
|
}
|
|
|
|
private static func checkpoint(at url: URL) throws -> WalletBirthday {
|
|
let data = try Data(contentsOf: url)
|
|
let checkpoint = try JSONDecoder().decode(WalletBirthday.self, from: data)
|
|
return checkpoint
|
|
}
|
|
}
|
|
|
|
struct BundleCheckpointURLProvider {
|
|
var url: (NetworkType) -> URL
|
|
}
|
|
|
|
|
|
extension BundleCheckpointURLProvider {
|
|
|
|
/// Attempts to resolve the platform by checking `#if os(macOS)` build corresponds to a MacOS target
|
|
/// `#else` branch of that condition will assume iOS is the target platform
|
|
static var `default` = BundleCheckpointURLProvider { networkType in
|
|
#if os(macOS)
|
|
Self.macOS.url(networkType)
|
|
#else
|
|
Self.iOS.url(networkType)
|
|
#endif
|
|
}
|
|
|
|
static var iOS = BundleCheckpointURLProvider(url: { networkType in
|
|
switch networkType {
|
|
case .mainnet:
|
|
return WalletBirthday.mainnetCheckpointDirectory
|
|
case .testnet:
|
|
return WalletBirthday.testnetCheckpointDirectory
|
|
}
|
|
})
|
|
|
|
/// This variant attempts to retrieve the saplingActivation checkpoint for the given network type
|
|
/// using `Bundle.module.url(forResource:withExtension:subdirectory:localization)`
|
|
/// if not found it will return `WalletBirthday.mainnetCheckpointDirectory` or
|
|
/// `WalletBirthday.testnetCheckpointDirectory`. This responds to tests
|
|
/// failing on MacOS target because the checkpoint resources would fail.
|
|
static var macOS = BundleCheckpointURLProvider(url: { networkType in
|
|
switch networkType {
|
|
case .mainnet:
|
|
return Bundle.module.url(
|
|
forResource: "419200",
|
|
withExtension: "json",
|
|
subdirectory: "checkpoints/mainnet/",
|
|
localization: nil
|
|
)?
|
|
.deletingLastPathComponent() ?? WalletBirthday.mainnetCheckpointDirectory
|
|
case .testnet:
|
|
return Bundle.module.url(
|
|
forResource: "280000",
|
|
withExtension: "json",
|
|
subdirectory: "checkpoints/testnet/",
|
|
localization: nil
|
|
)?
|
|
.deletingLastPathComponent() ?? WalletBirthday.testnetCheckpointDirectory
|
|
}
|
|
})
|
|
}
|