ChallengeResponse.fromJson constructor Null safety
Implementation
factory ChallengeResponse.fromJson(Map<String, dynamic> json) {
return ChallengeResponse(json['transaction'] == null ? null : json['transaction']);
}
factory ChallengeResponse.fromJson(Map<String, dynamic> json) {
return ChallengeResponse(json['transaction'] == null ? null : json['transaction']);
}