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add reverse record #15

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add reverse record #15

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51 changes: 51 additions & 0 deletions src/NameService/NameService.cs
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Original file line number Diff line number Diff line change
Expand Up @@ -33,6 +33,7 @@ public sealed class NameService : Framework.SmartContract
private const byte Prefix_Root = 0x20;
private const byte Prefix_Name = 0x21;
private const byte Prefix_Record = 0x22;
private const byte Prefix_ReverseRecord = 0x23;

private const int NameMaxLength = 255;
private const ulong OneYear = 365ul * 24 * 3600 * 1000;
Expand Down Expand Up @@ -228,6 +229,20 @@ public static bool Register(string name, UInt160 owner)
else
balanceMap.Put(oldOwner, balance);
accountMap.Delete(oldOwner + tokenKey);

//clear record
StorageMap recordMap = new(context, Prefix_Record);
var allrecords = (Iterator<RecordState>)recordMap.Find(tokenKey, FindOptions.ValuesOnly | FindOptions.DeserializeValues);
foreach (var state in allrecords)
{
byte[] recordKey = GetRecordKey(tokenKey, state.Name, state.Type);
StorageMap reverseMap = new(context, Prefix_ReverseRecord);
if (state.Type == RecordType.TXT && reverseMap[state.Data] is not null)
{
reverseMap.Delete(state.Data);
}
recordMap.Delete(recordKey);
}
}
else
{
Expand Down Expand Up @@ -579,5 +594,41 @@ private static bool CheckIPv6(string ipv6)
}
return true;
}

public bool SetReverseRecord(UInt160 owner, string name)
{
if (!Runtime.CheckWitness(owner)) return false;
StorageContext context = Storage.CurrentContext;
StorageMap reverseMap = new(context, Prefix_ReverseRecord);
string record = GetRecord(name, RecordType.TXT);
if (record == owner.ToAddress(53))
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I prefer to use the protocol settings value

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I prefer to use the protocol settings value

how to get the settings value from smart contract?

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System.Runtime.GetAddressVersion

{
reverseMap.Put(record, name);
return true;
}
return false;
}

[Safe]
public string GetReverseRecord(UInt160 owner)
{
StorageContext context = Storage.CurrentContext;
StorageMap reverseMap = new(context, Prefix_ReverseRecord);
string address = owner.ToAddress(53);
if (reverseMap[address] is not null)
{
string name = reverseMap[address];
string record = GetRecord(name, RecordType.TXT);
if (record == owner.ToAddress(53))
{
return name;
}
else
{
return "";
}
}
return "";
}
}
}