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52 lines
2.1 KiB
Swift
52 lines
2.1 KiB
Swift
import PromiseKit
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import SessionSnodeKit
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import SessionUtilities
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public enum SendingPipeline {
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private static let ttl: UInt64 = 2 * 24 * 60 * 60 * 1000
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public enum Destination {
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case contact(publicKey: String)
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case closedGroup(publicKey: String)
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case openGroup(channel: UInt64, server: String)
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}
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public enum Error : LocalizedError {
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case invalidMessage
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case protoConversionFailed
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case protoSerializationFailed
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case proofOfWorkCalculationFailed
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public var errorDescription: String? {
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switch self {
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case .invalidMessage: return "Invalid message."
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case .protoConversionFailed: return "Couldn't convert message to proto."
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case .protoSerializationFailed: return "Couldn't serialize proto."
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case .proofOfWorkCalculationFailed: return "Proof of work calculation failed."
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}
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}
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}
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public static func send(_ message: Message, to destination: Destination) -> Promise<Void> {
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guard message.isValidForSending else { return Promise(error: Error.invalidMessage) }
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guard let proto = message.toProto() else { return Promise(error: Error.protoConversionFailed) }
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let plaintext: Data
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do {
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plaintext = try proto.serializedData()
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} catch {
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SNLog("Couldn't serialize proto due to error: \(error).")
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return Promise(error: Error.protoSerializationFailed)
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}
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let ciphertext = plaintext // TODO: Encryption
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let recipient = message.recipient!
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let base64EncodedData = ciphertext.base64EncodedString()
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guard let (timestamp, nonce) = ProofOfWork.calculate(ttl: ttl, publicKey: recipient, data: base64EncodedData) else {
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SNLog("Proof of work calculation failed.")
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return Promise(error: Error.proofOfWorkCalculationFailed)
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}
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let snodeMessage = SnodeMessage(recipient: recipient, data: base64EncodedData, ttl: ttl, timestamp: timestamp, nonce: nonce)
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let _ = SnodeAPI.sendMessage(snodeMessage)
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return Promise.value(())
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}
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}
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