/*向债仓锁定数字资产*/
public static bool Lock(byte[] addr, BigInteger value)
{
if (addr.Length != 20) return false;
if (value == 0) return false;
byte[] key = addr.Concat(ConvertN(0));
byte[] cdp = Storage.Get(Storage.CurrentContext, key);
if (cdp.Length == 0) return false;
byte[] to = Storage.Get(Storage.CurrentContext, STORAGE_ACCOUNT);
if (to.Length == 0) return false;
object[] arg = new object[3];
arg[0] = addr;
arg[1] = to;
arg[2] = value;
if (!(bool)SDTContract("transfer", arg)) return false;
var txid = ((Transaction)ExecutionEngine.ScriptContainer).Hash;
//object[] obj = new object[1];
//obj[0] = txid;
//TransferInfo transferInfo = (TransferInfo)SDTContract("getTXInfo", obj);
/*校验交易信息*/
//if (transferInfo.from != addr || transferInfo.to != to || value != transferInfo.value) return false;
byte[] used = Storage.Get(Storage.CurrentContext, txid);
/*判断txid是否已被使用*/
if (used.Length != 0) return false;
CDPTransferInfo cdpInfo = (CDPTransferInfo)Helper.Deserialize(cdp);
cdpInfo.locked = cdpInfo.locked + value;
BigInteger currLock = cdpInfo.locked;
Storage.Put(Storage.CurrentContext, key, Helper.Serialize(cdpInfo));
//记录交易详细数据
CDPTransferDetail detail = new CDPTransferDetail();
detail.from = addr;
detail.cdpTxid = cdpInfo.txid;
detail.type = (int)ConfigTranType.TRANSACTION_TYPE_LOCK;
detail.operated = value;
detail.hasLocked = currLock;
detail.hasDrawed = cdpInfo.hasDrawed;
detail.txid = txid;
Storage.Put(Storage.CurrentContext, txid, Helper.Serialize(detail));
/*记录txid 已被使用*/
Storage.Put(Storage.CurrentContext, txid, addr);
return true;
}
/*查询债仓详情*/
public static CDPTransferInfo getCDP(byte[] onwer)
{
byte[] key = onwer.Concat(ConvertN(0));
byte[] cdp = Storage.Get(Storage.CurrentContext, key);
if (cdp.Length == 0) return null;
CDPTransferInfo cdpInfo = (CDPTransferInfo)Helper.Deserialize(cdp);
return cdpInfo;
}
private static Boolean shut(byte[] addr)
{
//CDP是否存在
var key = addr.Concat(ConvertN(0));
byte[] cdp = Storage.Get(Storage.CurrentContext, key);
if (cdp.Length == 0)
return false;
CDPTransferInfo cdpInfo = (CDPTransferInfo)Helper.Deserialize(cdp);
byte[] owner = cdpInfo.owner;
BigInteger locked = cdpInfo.locked;
BigInteger hasDrawed = cdpInfo.hasDrawed;
//当前余额必须要大于负债
BigInteger balance = balanceOf(addr);
if (hasDrawed > balance) return false;
var txid = ((Transaction)ExecutionEngine.ScriptContainer).Hash;
//从合约地址转账
byte[] from = Storage.Get(Storage.CurrentContext, STORAGE_ACCOUNT);
object[] arg = new object[3];
arg[0] = from;
arg[1] = owner;
arg[2] = locked;
if (!(bool)SDTContract("transfer_contract", arg)) return false;
if (hasDrawed > 0)
{
//先要销毁SD
transfer(addr, null, hasDrawed);
//减去总量
operateTotalSupply(0 - hasDrawed);
}
//关闭CDP
Storage.Delete(Storage.CurrentContext, key);
//记录交易详细数据
CDPTransferDetail detail = new CDPTransferDetail();
detail.from = addr;
detail.cdpTxid = cdpInfo.txid;
detail.txid = txid;
detail.type = (int)ConfigTranType.TRANSACTION_TYPE_SHUT;
detail.operated = hasDrawed;
detail.hasLocked = locked;
detail.hasDrawed = hasDrawed;
Storage.Put(Storage.CurrentContext, txid, Helper.Serialize(detail));
return true;
}
public static bool draw(byte[] addr, BigInteger drawSdusdValue)
{
if (addr.Length != 20) return false;
if (drawSdusdValue <= 0) return false;
byte[] key = addr.Concat(ConvertN(0));
byte[] cdp = Storage.Get(Storage.CurrentContext, key);
if (cdp.Length == 0) return false;
//获取CDP
CDPTransferInfo cdpInfo = (CDPTransferInfo)Helper.Deserialize(cdp);
BigInteger locked = cdpInfo.locked;
BigInteger hasDrawed = cdpInfo.hasDrawed;
BigInteger sdt_price = getConfig(CONFIG_SDT_PRICE);
BigInteger sdt_rate = getConfig(CONFIG_SDT_RATE); ;
BigInteger sdusd_limit = sdt_price * locked * 100 / sdt_rate;
if (sdusd_limit < hasDrawed + drawSdusdValue) return false;
if (!increase(addr, drawSdusdValue)) return false; ;
cdpInfo.hasDrawed = hasDrawed + drawSdusdValue;
Storage.Put(Storage.CurrentContext, key, Helper.Serialize(cdpInfo));
//记录交易详细数据
var txid = ((Transaction)ExecutionEngine.ScriptContainer).Hash;
CDPTransferDetail detail = new CDPTransferDetail();
detail.from = addr;
detail.cdpTxid = cdpInfo.txid;
detail.txid = txid;
detail.type = (int)ConfigTranType.TRANSACTION_TYPE_DRAW;
detail.operated = drawSdusdValue;
detail.hasLocked = locked;
detail.hasDrawed = hasDrawed;
Storage.Put(Storage.CurrentContext, txid, Helper.Serialize(detail));
return true;
}
/*开启一个新的债仓*/
public static bool openCDP(byte[] addr)
{
if (addr.Length != 20) return false;
CDPTransferInfo cdpInfo_ = getCDP(addr);
if (cdpInfo_ != null) return false;
byte[] txid = ((Transaction)ExecutionEngine.ScriptContainer).Hash;
CDPTransferInfo cdpInfo = new CDPTransferInfo();
cdpInfo.owner = addr;
cdpInfo.txid = txid;
cdpInfo.locked = 0;
cdpInfo.hasDrawed = 0;
byte[] key = addr.Concat(ConvertN(0));
byte[] cdp = Helper.Serialize(cdpInfo);
Storage.Put(Storage.CurrentContext, key, cdp);
return true;
}