Submit customer identity proofs and show reviewed limits

frontend/packages/sxchnge_kyc/lib/src/transport/backend.dart

@@ -0,0 +1,74 @@
+import 'dart:convert';
+
+class ProfileDTO {
+  const ProfileDTO(this.fullName, this.dateOfBirth, this.residenceCountry);
+  factory ProfileDTO.fromJson(Map<String, dynamic> data) => ProfileDTO(
+    data['fullName'] as String? ?? '',
+    data['dateOfBirth'] as String? ?? '',
+    data['residenceCountry'] as String? ?? '',
+  );
+  final String fullName, dateOfBirth, residenceCountry;
+  Map<String, String> toJson() => {
+    'fullName': fullName,
+    'dateOfBirth': dateOfBirth,
+    'residenceCountry': residenceCountry,
+  };
+}
+
+class VerificationDTO {
+  const VerificationDTO(
+    this.status,
+    this.reason,
+    this.id,
+    this.profile, {
+    this.upgradePending = false,
+  });
+  factory VerificationDTO.decode(String body) {
+    final envelope = jsonDecode(body) as Map<String, dynamic>;
+    if (envelope['status'] != 'success')
+      throw const FormatException('Unaccepted verification');
+    final data = envelope['data'] as Map<String, dynamic>;
+    return VerificationDTO(
+      data['status'] as String,
+      data['reason'] as String?,
+      data['submissionId'] as String?,
+      ProfileDTO.fromJson(data['profile'] as Map<String, dynamic>),
+      upgradePending: data['upgradePending'] as bool? ?? false,
+    );
+  }
+  final String status;
+  final String? reason, id;
+  final ProfileDTO profile;
+  final bool upgradePending;
+}
+
+class PolicyDTO {
+  const PolicyDTO(this.tier, this.profileRef, this.entries);
+  factory PolicyDTO.decode(String body) {
+    final envelope = jsonDecode(body) as Map<String, dynamic>;
+    if (envelope['status'] != 'success')
+      throw const FormatException('Unaccepted limits');
+    final data = envelope['data'] as Map<String, dynamic>;
+    return PolicyDTO(
+      data['tier'] as String,
+      data['profileRef'] as String,
+      (data['entries'] as List)
+          .map((v) => LimitDTO.fromJson(v as Map<String, dynamic>))
+          .toList(),
+    );
+  }
+  final String tier, profileRef;
+  final List<LimitDTO> entries;
+}
+
+class LimitDTO {
+  LimitDTO.fromJson(Map<String, dynamic> d)
+    : operation = d['operation'] as String,
+      period = d['period'] as String,
+      currency = d['currency'] as String,
+      cap = d['cap'] as String,
+      remaining = d['remaining'] as String,
+      used = d['used'] as String,
+      reserved = d['reserved'] as String;
+  final String operation, period, currency, cap, remaining, used, reserved;
+}