[codex] Fix transit card balance readers

AGENTS.md

@@ -149,6 +149,7 @@ NSLayoutConstraint.activate([...])
 ### Empty States
 
 List view controllers (Scanner, Dump, NDEF, Passport) use `EmptyStateView` for empty-list placeholders:
+
 - Installed as a subview of the table view via `emptyState.install(on: tableView)`.
 - Visibility toggled by checking the data store's `records.isEmpty`.
 - Fades on scroll via `emptyState.updateAlpha(for: scrollView)` in `scrollViewDidScroll`.

Example/CENFC/Configuration/Version.xcconfig

@@ -1,2 +1,2 @@
-MARKETING_VERSION = 1.0.7
-CURRENT_PROJECT_VERSION = 14
+MARKETING_VERSION = 1.0.8
+CURRENT_PROJECT_VERSION = 15

Example/CENFC/Resources/Info.plist

@@ -129,6 +129,9 @@
 		<string>90B7</string>
 		<string>927A</string>
 		<string>86A7</string>
+		<string>80DE</string>
+		<string>865E</string>
+		<string>8592</string>
 	</array>
 	<key>com.apple.developer.nfc.readersession.iso7816.select-identifiers</key>
 	<array>
@@ -138,11 +141,17 @@
 		<string>A0000002472001</string>
 		<string>A000000167455349474E</string>
 		<string>A000000291</string>
+		<string>A000000404</string>
 		<string>A00000000386980701</string>
 		<string>A0000004520001</string>
 		<string>D4100000030001</string>
 		<string>D4100000140001</string>
 		<string>D410000029000001</string>
+		<string>D4100000300001</string>
+		<string>D4106509900020</string>
+		<string>A000000632010105</string>
+		<string>A000000341000101</string>
+		<string>5041592E535A54</string>
 		<string>D2760000850100</string>
 		<string>F049442E43484E</string>
 		<string>A000000812010208</string>

Example/CENFCTests/NFCConfigurationTests.swift

@@ -0,0 +1,36 @@
+import Foundation
+import Testing
+
+struct NFCConfigurationTests {
+    @Test
+    func `ISO7816 select identifiers include implemented transit AIDs`() throws {
+        let identifiers = try #require(
+            Bundle.main.object(
+                forInfoDictionaryKey: "com.apple.developer.nfc.readersession.iso7816.select-identifiers"
+            ) as? [String]
+        )
+
+        #expect(identifiers.contains("A000000632010105")) // China T-Union
+        #expect(identifiers.contains("A000000404")) // CardBal transit / stored-value app
+        #expect(identifiers.contains("5041592E535A54")) // Legacy Shenzhen Tong
+        #expect(identifiers.contains("A000000341000101")) // Singapore CEPAS discovery
+        #expect(identifiers.contains("D4100000030001")) // KSX6924 / Snapper-compatible discovery
+        #expect(identifiers.contains("D4100000300001")) // Snapper / MOIBA
+        #expect(identifiers.contains("D4106509900020")) // K-Cash
+    }
+
+    @Test
+    func `FeliCa system codes include CardBal transit codes`() throws {
+        let systemCodes = try #require(
+            Bundle.main.object(
+                forInfoDictionaryKey: "com.apple.developer.nfc.readersession.felica.systemcodes"
+            ) as? [String]
+        )
+
+        #expect(systemCodes.contains("0003")) // Japan IC
+        #expect(systemCodes.contains("8008")) // Octopus
+        #expect(systemCodes.contains("80DE")) // CardBal transit code
+        #expect(systemCodes.contains("865E")) // CardBal transit code
+        #expect(systemCodes.contains("8592")) // CardBal transit code
+    }
+}

Sources/CoreExtendedNFC/Cards/Transit/China/TUnionConstants.swift

@@ -5,6 +5,7 @@ import Foundation
 /// ## References
 /// - T-Union AID: A000000632010105
 /// - Metrodroid ChinaTransitData / TUnionTransitData
+/// - FareBot ChinaCard / TUnionTransitInfo
 /// - NFSee: https://github.com/niceda/NFSee
 ///
 /// ## Note
@@ -16,15 +17,29 @@ enum TUnionConstants {
 
     // MARK: - File IDs
 
-    /// Main file containing balance, serial, and validity info.
+    /// Main file containing serial and validity info.
     static let balanceFileID = Data([0x00, 0x15])
+    static let file15SFIReadP1: UInt8 = 0x95
+
+    /// T-Union transaction record SFI. CardBal documents this as a circular
+    /// 0x17-byte transaction/top-up record file.
+    static let transactionSFI: UInt8 = 0x18
+    static let transactionRecordLength: UInt8 = 0x17
+    static let maxTransactionRecords = 10
+
+    /// T-Union transit activity SFI. CardBal documents this as a circular
+    /// 0x30-byte travel activity record file.
+    static let transitActivitySFI: UInt8 = 0x1E
+    static let transitActivityRecordLength: UInt8 = 0x30
+    static let maxTransitActivityRecords = 30
 
     // MARK: - GET BALANCE Command
 
     /// Proprietary GET BALANCE: CLA=0x80 INS=0x5C P1=0x00 P2=0x02.
     static let GET_BALANCE_CLA: UInt8 = 0x80
     static let GET_BALANCE_INS: UInt8 = 0x5C
     static let GET_BALANCE_P1: UInt8 = 0x00
+    static let GET_NEGATIVE_BALANCE_P1: UInt8 = 0x01
     static let GET_BALANCE_P2: UInt8 = 0x02
     static let GET_BALANCE_LE: UInt8 = 0x04
 
@@ -39,4 +54,15 @@ enum TUnionConstants {
     /// Validity end: bytes 24-27 (4 bytes hex date YYYYMMDD).
     static let validUntilOffset = 24
     static let validUntilLength = 4
+
+    // MARK: - Transaction Record Layout
+
+    static let transactionAmountOffset = 5
+    static let transactionAmountLength = 4
+    static let transactionTypeOffset = 9
+    static let transactionStationOffset = 10
+    static let transactionStationLength = 6
+    static let transactionDateTimeOffset = 16
+    static let transactionDateTimeLength = 7
+    static let topUpType: UInt8 = 0x02
 }