add support for PayMV QR scan

2026-05-13 03:36:14 +05:00
parent b452940ed0
commit 6a3738fc2f
13 changed files with 395 additions and 3 deletions
@@ -0,0 +1,48 @@
+package sh.sar.basedbank.util
+
+data class PaymvQrData(
+    val accountNumber: String?,
+    val amount: String?,
+    val purpose: String?,
+    val merchantName: String?
+)
+
+object PaymvQrParser {
+
+    fun parse(raw: String): PaymvQrData? {
+        return try {
+            val root = parseTlv(raw)
+
+            // ID 26: Favara/PayMV merchant account info
+            val merchantInfo = root["26"]?.let { parseTlv(it) }
+
+            // ID 54: transaction amount
+            // ID 59: merchant/recipient name
+            // ID 62: additional data (sub-ID 08 = purpose)
+            val additionalData = root["62"]?.let { parseTlv(it) }
+
+            PaymvQrData(
+                accountNumber = merchantInfo?.get("03"),
+                amount = root["54"],
+                purpose = additionalData?.get("08"),
+                merchantName = root["59"]
+            )
+        } catch (_: Exception) {
+            null
+        }
+    }
+
+    private fun parseTlv(data: String): Map<String, String> {
+        val result = mutableMapOf<String, String>()
+        var pos = 0
+        while (pos + 4 <= data.length) {
+            val id = data.substring(pos, pos + 2)
+            val len = data.substring(pos + 2, pos + 4).toIntOrNull() ?: break
+            pos += 4
+            if (pos + len > data.length) break
+            result[id] = data.substring(pos, pos + len)
+            pos += len
+        }
+        return result
+    }
+}