Implement bank transfer app flows

Thijooree iOS/Utils/PaymvQrParser.swift

@@ -0,0 +1,52 @@
+import Foundation
+
+struct PaymvQrResult {
+    let account: String
+    let amount: String?
+    let merchantName: String?
+    let purpose: String?
+}
+
+enum PaymvQrParser {
+    static func parse(_ qr: String) -> PaymvQrResult? {
+        let tlvs = parseTLV(qr)
+
+        // Tag 26: merchant account info — sub-tag 03 = account number
+        var account: String?
+        if let tag26 = tlvs["26"] {
+            let sub = parseTLV(tag26)
+            account = sub["03"]
+        }
+
+        guard let acc = account, !acc.isEmpty else { return nil }
+
+        let amount = tlvs["54"]
+        let name   = tlvs["59"]
+
+        // Tag 62: additional data — sub-tag 08 = purpose/reference
+        var purpose: String?
+        if let tag62 = tlvs["62"] {
+            let sub = parseTLV(tag62)
+            purpose = sub["08"]
+        }
+
+        return PaymvQrResult(account: acc, amount: amount, merchantName: name, purpose: purpose)
+    }
+
+    private static func parseTLV(_ s: String) -> [String: String] {
+        var result: [String: String] = [:]
+        var idx = s.startIndex
+        while s.distance(from: idx, to: s.endIndex) >= 4 {
+            let idEnd  = s.index(idx, offsetBy: 2)
+            let lenEnd = s.index(idEnd, offsetBy: 2)
+            let id     = String(s[idx..<idEnd])
+            guard let len = Int(s[idEnd..<lenEnd]) else { break }
+            idx = lenEnd
+            guard s.distance(from: idx, to: s.endIndex) >= len else { break }
+            let valEnd = s.index(idx, offsetBy: len)
+            result[id] = String(s[idx..<valEnd])
+            idx = valEnd
+        }
+        return result
+    }
+}