public static bool wantBuy(byte[] hash, string domainname)
{
var domaininfo = getOwnerInfo(hash);
//先看这个域名归我管不
if (domaininfo.register.AsBigInteger() != ExecutionEngine.ExecutingScriptHash.AsBigInteger())
{
return(false);
}
//再看看域名能不能拍卖
var fullhash = nameHashSub(hash, domainname);
var inuse = getDomainUseState(fullhash);
if (inuse == DomainUseState.InUse)
{
return(false);
}
//再看看有没有在拍卖
var selling = getSellingStateByFullhash(fullhash);
if (selling.startBlockSelling > 0) //已经在拍卖中了
{
if (testEnd(selling) == false) //拍卖未结束不准
{
return(false);
}
if (selling.maxBuyer.Length > 0)//未流拍的拍卖,一年内不得再拍
{
var nowtime = Blockchain.GetHeader(Blockchain.GetHeight()).Timestamp;
var starttime = Blockchain.GetHeader((uint)selling.startBlockSelling).Timestamp;
if ((nowtime - starttime) < secondyear)
{
return(false);
}
}
}
SellingState sell = new SellingState();
sell.parenthash = hash;
sell.domain = domainname;
sell.domainTTL = domaininfo.TTL;
sell.startBlockSelling = Blockchain.GetHeight();//开始拍卖了
//sell.startBlockRan = 0;//随机块现在还不能确定
sell.endBlock = 0;
sell.maxPrice = 0;
sell.maxBuyer = new byte[0];
sell.lastBlock = 0;
var txid = (ExecutionEngine.ScriptContainer as Transaction).Hash;
sell.id = txid;
saveSellingState(sell);
onSellingState(sell);
return(true);
}
public static SellingState getSellingStateByTXID(byte[] txid)
{
var data = Storage.Get(Storage.CurrentContext, new byte[] { 0x02 }.Concat(txid));
SellingState state = new SellingState();
state.id = txid;
int seek = 0;
int len = 0;
len = (int)data.Range(seek, 2).AsBigInteger();
seek += 2;
state.parenthash = data.Range(seek, len);
seek += len;
len = (int)data.Range(seek, 2).AsBigInteger();
seek += 2;
state.domain = data.Range(seek, len).AsString();
seek += len;
len = (int)data.Range(seek, 2).AsBigInteger();
seek += 2;
state.domainTTL = data.Range(seek, len).AsBigInteger();
seek += len;
len = (int)data.Range(seek, 2).AsBigInteger();
seek += 2;
state.startBlockSelling = data.Range(seek, len).AsBigInteger();
seek += len;
//len = (int)data.Range(seek, 2).AsBigInteger();
//seek += 2;
//state.startBlockRan = data.Range(seek, len).AsBigInteger();
//seek += len;
len = (int)data.Range(seek, 2).AsBigInteger();
seek += 2;
state.endBlock = data.Range(seek, len).AsBigInteger();
seek += len;
len = (int)data.Range(seek, 2).AsBigInteger();
seek += 2;
state.maxPrice = data.Range(seek, len).AsBigInteger();
seek += len;
len = (int)data.Range(seek, 2).AsBigInteger();
seek += 2;
state.maxBuyer = data.Range(seek, len);
seek += len;
len = (int)data.Range(seek, 2).AsBigInteger();
seek += 2;
state.lastBlock = data.Range(seek, len).AsBigInteger();
seek += len;
return(state);
}
private static bool testEnd(SellingState selling)
{
if (selling.startBlockSelling == 0)//就没开始过
{
return(false);
}
if (selling.endBlock > 0)//已经结束了
{
return(false);
}
var nowtime = Blockchain.GetHeader(Blockchain.GetHeight()).Timestamp;
var starttime = Blockchain.GetHeader((uint)selling.startBlockSelling).Timestamp;
var step2time = starttime + secondday * 2;
var steprantime = starttime + secondday * 3;
var endtime = starttime + secondday * 5;
if (nowtime < steprantime)//随机期都没到,肯定没结束
{
return(false);
}
if (nowtime > endtime)//毫无悬念结束了
{
selling.endBlock = Blockchain.GetHeight();
saveSellingState(selling);
onSellingState(selling);
return(true);
}
var lasttime = Blockchain.GetHeader((uint)selling.lastBlock).Timestamp;
if (lasttime < step2time)//阶段2没出过价
{
selling.endBlock = Blockchain.GetHeight();
saveSellingState(selling);
onSellingState(selling);
return(true);
}
//随机期
var nowheader = Blockchain.GetHeader(Blockchain.GetHeight());
//得到当前块在整个随机期所处的位置
var persenttime = (nowheader.Timestamp - steprantime) * 1000 / (endtime - steprantime);
//当处于10%位置的时候,只有10%的几率结束
if ((nowheader.ConsensusData % 1000) < persenttime) //随机数小于块位置
{
selling.endBlock = nowheader.Index;; //突然死亡,无法出价了
saveSellingState(selling);
onSellingState(selling);
return(true);
}
//走到这里都没死,那就允许你出价,这里是随机期
return(false);
}
private static void saveSellingState(SellingState state)
{
var fullhash = nameHashSub(state.parenthash, state.domain);
byte[] _id = Storage.Get(Storage.CurrentContext, new byte[] { 0x01 }.Concat(fullhash));
if (_id.AsBigInteger() != state.id.AsBigInteger())//没存过ID
{
Storage.Put(Storage.CurrentContext, new byte[] { 0x01 }.Concat(fullhash), state.id);
}
var key = new byte[] { 0x02 }.Concat(state.id);
var doublezero = new byte[] { 0, 0 };
var data = state.parenthash;
var datalen = ((BigInteger)data.Length).AsByteArray().Concat(doublezero).Range(0, 2);
var value = datalen.Concat(data);
data = state.domain.AsByteArray();
datalen = ((BigInteger)data.Length).AsByteArray().Concat(doublezero).Range(0, 2);
value = value.Concat(datalen).Concat(data);
data = state.domainTTL.AsByteArray();
datalen = ((BigInteger)data.Length).AsByteArray().Concat(doublezero).Range(0, 2);
value = value.Concat(datalen).Concat(data);
data = state.startBlockSelling.AsByteArray();
datalen = ((BigInteger)data.Length).AsByteArray().Concat(doublezero).Range(0, 2);
value = value.Concat(datalen).Concat(data);
//data = state.startBlockRan.AsByteArray();
//datalen = ((BigInteger)data.Length).AsByteArray().Concat(doublezero).Range(0, 2);
//value = value.Concat(datalen).Concat(data);
data = state.endBlock.AsByteArray();
datalen = ((BigInteger)data.Length).AsByteArray().Concat(doublezero).Range(0, 2);
value = value.Concat(datalen).Concat(data);
data = state.maxPrice.AsByteArray();
datalen = ((BigInteger)data.Length).AsByteArray().Concat(doublezero).Range(0, 2);
value = value.Concat(datalen).Concat(data);
data = state.maxBuyer;
datalen = ((BigInteger)data.Length).AsByteArray().Concat(doublezero).Range(0, 2);
value = value.Concat(datalen).Concat(data);
data = state.lastBlock.AsByteArray();
datalen = ((BigInteger)data.Length).AsByteArray().Concat(doublezero).Range(0, 2);
value = value.Concat(datalen).Concat(data);
onSellingState(state);
Storage.Put(Storage.CurrentContext, key, value);
}
public static SellingState getSellingStateByFullhash(byte[] fullhash)
{
//需要保存每一笔拍卖记录,因为过去拍卖者的资金都要锁定在这里
byte[] id = Storage.Get(Storage.CurrentContext, new byte[] { 0x01 }.Concat(fullhash));
if (id.Length == 0)//没在销售中
{
SellingState _state = new SellingState();
_state.id = new byte[0];
_state.startBlockSelling = 0;
return(_state);
}
return(getSellingStateByTXID(id));
}