mirror of
https://github.com/aljazceru/breez-sdk-liquid.git
synced 2025-12-21 16:04:27 +01:00
42c7bfe285
* Add LNURL-verify notification plugin tasks * Only settled when MRH payment is complete * Ignore unknown JSON keys * Log fail replyURL * Prevent escaping slashes
76 lines
4.0 KiB
Swift
76 lines
4.0 KiB
Swift
import UserNotifications
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import Foundation
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struct LnurlInvoiceRequest: Codable {
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let amount: UInt64
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let reply_url: String
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let verify_url: String?
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}
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// Serialize the response according to:
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// - LUD-06: https://github.com/lnurl/luds/blob/luds/06.md
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// - LUD-21: https://github.com/lnurl/luds/blob/luds/21.md
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struct LnurlInvoiceResponse: Decodable, Encodable {
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let pr: String
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let routes: [String]
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let verify: String?
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init(pr: String, routes: [String], verify: String?) {
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self.pr = pr
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self.routes = routes
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self.verify = verify
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}
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}
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class LnurlPayInvoiceTask : LnurlPayTask {
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fileprivate let TAG = "LnurlPayInvoiceTask"
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init(payload: String, logger: ServiceLogger, contentHandler: ((UNNotificationContent) -> Void)? = nil, bestAttemptContent: UNMutableNotificationContent? = nil) {
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let successNotificationTitle = ResourceHelper.shared.getString(key: Constants.LNURL_PAY_INVOICE_NOTIFICATION_TITLE, fallback: Constants.DEFAULT_LNURL_PAY_INVOICE_NOTIFICATION_TITLE)
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let failNotificationTitle = ResourceHelper.shared.getString(key: Constants.LNURL_PAY_NOTIFICATION_FAILURE_TITLE, fallback: Constants.DEFAULT_LNURL_PAY_NOTIFICATION_FAILURE_TITLE)
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super.init(payload: payload, logger: logger, contentHandler: contentHandler, bestAttemptContent: bestAttemptContent, successNotificationTitle: successNotificationTitle, failNotificationTitle: failNotificationTitle)
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}
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override func start(liquidSDK: BindingLiquidSdk) throws {
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var request: LnurlInvoiceRequest? = nil
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do {
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request = try JSONDecoder().decode(LnurlInvoiceRequest.self, from: self.payload.data(using: .utf8)!)
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} catch let e {
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self.logger.log(tag: TAG, line: "failed to decode payload: \(e)", level: "ERROR")
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self.displayPushNotification(title: self.failNotificationTitle, logger: self.logger, threadIdentifier: Constants.NOTIFICATION_THREAD_REPLACEABLE)
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throw e
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}
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do {
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// Get the lightning limits
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let limits = try liquidSDK.fetchLightningLimits()
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// Check amount is within limits
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let amountSat = request!.amount / UInt64(1000)
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if amountSat < limits.receive.minSat || amountSat > limits.receive.maxSat {
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throw InvalidLnurlPayError.amount(amount: request!.amount)
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}
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let plainTextMetadata = ResourceHelper.shared.getString(key: Constants.LNURL_PAY_METADATA_PLAIN_TEXT, fallback: Constants.DEFAULT_LNURL_PAY_METADATA_PLAIN_TEXT)
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let metadata = "[[\"text/plain\",\"\(plainTextMetadata)\"]]"
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let amount = ReceiveAmount.bitcoin(payerAmountSat: amountSat)
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let prepareReceivePaymentRes = try liquidSDK.prepareReceivePayment(req: PrepareReceiveRequest(paymentMethod: PaymentMethod.lightning, amount: amount))
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let receivePaymentRes = try liquidSDK.receivePayment(req: ReceivePaymentRequest(prepareResponse: prepareReceivePaymentRes, description: metadata, useDescriptionHash: true))
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// Add the verify URL
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var verify: String?
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if let verifyUrl = request!.verify_url {
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do {
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let inputType = try liquidSDK.parse(input: receivePaymentRes.destination)
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if case .bolt11(let invoice) = inputType {
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verify = verifyUrl.replacingOccurrences(of: "{payment_hash}", with: invoice.paymentHash)
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}
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} catch let e {
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self.logger.log(tag: TAG, line: "Failed to parse destination: \(e)", level: "ERROR")
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}
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}
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self.replyServer(encodable: LnurlInvoiceResponse(pr: receivePaymentRes.destination, routes: [], verify: verify), replyURL: request!.reply_url)
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} catch let e {
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self.logger.log(tag: TAG, line: "failed to process lnurl: \(e)", level: "ERROR")
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self.fail(withError: e.localizedDescription, replyURL: request!.reply_url)
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}
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}
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}
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