fromJson static method

ConfirmedTransactionMeta? fromJson(dynamic value)

Returns a new ConfirmedTransactionMeta instance and imports its values from value if it's a Map, null otherwise.

Implementation

// ignore: prefer_constructors_over_static_methods
static ConfirmedTransactionMeta? fromJson(dynamic value) {
  if (value is Map) {
    final json = value.cast<String, dynamic>();

    // Ensure that the map contains the required keys.
    // Note 1: the values aren't checked for validity beyond being non-null.
    // Note 2: this code is stripped in release mode!
    assert(() {
      requiredKeys.forEach((key) {
        assert(json.containsKey(key), 'Required key "ConfirmedTransactionMeta[$key]" is missing from JSON.');
        assert(json[key] != null, 'Required key "ConfirmedTransactionMeta[$key]" has a null value in JSON.');
      });
      return true;
    }());

    return ConfirmedTransactionMeta(
      fee: mapValueOfType<int>(json, r'fee'),
      innerInstructions: CompiledInnerInstruction.listFromJson(json[r'innerInstructions']) ?? const [],
      preBalances: json[r'preBalances'] is List
          ? (json[r'preBalances'] as List).cast<int>()
          : const [],
      postBalances: json[r'postBalances'] is List
          ? (json[r'postBalances'] as List).cast<int>()
          : const [],
      logMessages: json[r'logMessages'] is List
          ? (json[r'logMessages'] as List).cast<String>()
          : const [],
      preTokenBalances: TokenBalance.listFromJson(json[r'preTokenBalances']) ?? const [],
      postTokenBalances: TokenBalance.listFromJson(json[r'postTokenBalances']) ?? const [],
      err: mapValueOfType<Object>(json, r'err'),
    );
  }
  return null;
}