public bool Create(ExecutionEngine engine)
{
if (Trigger != TriggerType.Application)
{
return(false);
}
// 全名
if (engine.CurrentContext.EvaluationStack.Peek().GetByteArray().Length > 1024)
{
return(false);
}
string name = Encoding.UTF8.GetString(engine.CurrentContext.EvaluationStack.Pop().GetByteArray());
// 简写名
if (engine.CurrentContext.EvaluationStack.Peek().GetByteArray().Length > 252)
{
return(false);
}
string symbol = Encoding.UTF8.GetString(engine.CurrentContext.EvaluationStack.Pop().GetByteArray());
// 货币总量
Fixed8 amount = new Fixed8((long)engine.CurrentContext.EvaluationStack.Pop().GetBigInteger());
if (amount < Fixed8.Zero)
{
return(false);
}
// 货币精度
byte precision = (byte)engine.CurrentContext.EvaluationStack.Pop().GetBigInteger();
if (precision > 8)
{
return(false);
}
if (amount.GetData() % (long)Math.Pow(10, precision) != 0)
{
return(false);
}
// 发行人
ECPoint owner = ECPoint.DecodePoint(engine.CurrentContext.EvaluationStack.Pop().GetByteArray(), ECCurve.Secp256r1);
// 创世块不做检查
if (Snapshot.PersistingBlock.Index != 0)
{
// 检查发行人的签名
if (owner.IsInfinity)
{
return(false);
}
if (!Service.CheckWitness(engine, owner))
{
return(false);
}
}
// 管理员
UInt160 admin = new UInt160(engine.CurrentContext.EvaluationStack.Pop().GetByteArray());
// 创世块不做检查
if (Snapshot.PersistingBlock.Index != 0)
{
// 检查管理员的Hash
if (admin.Equals(UInt160.Zero))
{
return(false);
}
}
UInt160 assetId;
if (Snapshot.PersistingBlock.Index == 0)
{
// 只有在创世块里可以自定义assetId
assetId = new UInt160(engine.CurrentContext.EvaluationStack.Pop().GetByteArray());
}
else
{
// 用ScriptHash作为assetId
assetId = new UInt160(engine.CurrentContext.ScriptHash);
}
NativeNEP5State state = Snapshot.NativeNEP5s.TryGet(assetId);
if (state == null)
{
state = new NativeNEP5State
{
AssetId = assetId,
Name = name,
Symbol = symbol,
TotalSupply = amount,
Decimals = precision,
Owner = owner,
Admin = admin,
BlockIndex = Snapshot.Height + 1,
IsFrozen = false
};
// 保存到数据库
Snapshot.NativeNEP5s.Add(assetId, state);
}
// 设置脚本的返回值
engine.CurrentContext.EvaluationStack.Push(StackItem.FromInterface(state));
return(true);
}
public bool CreateAppChain(ExecutionEngine engine)
{
if (Trigger != TriggerType.Application)
{
return(false);
}
try
{
// 只能在根链上执行创建应用链的指令
if (!Snapshot.Blockchain.ChainHash.Equals(UInt160.Zero))
{
return(false);
}
// 应用链的Hash
UInt160 hash = new UInt160(engine.CurrentContext.EvaluationStack.Pop().GetByteArray());
// 应用链的名字
if (engine.CurrentContext.EvaluationStack.Peek().GetByteArray().Length > 252)
{
return(false);
}
string name = Encoding.UTF8.GetString(engine.CurrentContext.EvaluationStack.Pop().GetByteArray());
// 应用链的所有者
ECPoint owner = ECPoint.DecodePoint(engine.CurrentContext.EvaluationStack.Pop().GetByteArray(), ECCurve.Secp256r1);
if (owner.IsInfinity)
{
return(false);
}
// 交易的见证人里必须有应用链的所有者
if (!Service.CheckWitness(engine, owner))
{
return(false);
}
AppChainType type = (AppChainType)(byte)engine.CurrentContext.EvaluationStack.Pop().GetBigInteger();
// 创建时间
uint timestamp = (uint)engine.CurrentContext.EvaluationStack.Pop().GetBigInteger();
int seedCount = (int)engine.CurrentContext.EvaluationStack.Pop().GetBigInteger();
// 种子节点的数量不能为零
if (seedCount <= 0)
{
return(false);
}
string[] seedList = new string[seedCount];
for (int i = 0; i < seedCount; i++)
{
seedList[i] = Encoding.UTF8.GetString(engine.CurrentContext.EvaluationStack.Pop().GetByteArray());
}
// 判断输入的种子节点地址是否有效
if (!CheckSeedList(seedList, seedCount))
{
return(false);
}
int validatorCount = (int)engine.CurrentContext.EvaluationStack.Pop().GetBigInteger();
// 共识节点的数量不能小于四个
if (validatorCount < 4)
{
return(false);
}
ECPoint[] validators = new ECPoint[validatorCount];
for (int i = 0; i < validatorCount; i++)
{
validators[i] = ECPoint.DecodePoint(Encoding.UTF8.GetString(engine.CurrentContext.EvaluationStack.Pop().GetByteArray()).HexToBytes(), ECCurve.Secp256r1);
}
// 判断输入的共识节点字符串格式是否有效
if (!CheckValidators(validators, validatorCount))
{
return(false);
}
AppChainState state = Snapshot.AppChains.TryGet(hash);
if (state == null)
{
state = new AppChainState
{
Hash = hash,
Name = name,
Owner = owner,
Type = type,
Timestamp = timestamp,
LastModified = timestamp,
SeedList = seedList,
StandbyValidators = validators,
};
// 保存到数据库
Snapshot.AppChains.Add(hash, state);
// 添加通知事件，等待上链后处理
if (IsPersisting(engine))
{
Snapshot.Blockchain.AddAppChainNotification("Create", state);
}
}
// 设置脚本的返回值
engine.CurrentContext.EvaluationStack.Push(StackItem.FromInterface(state));
}
catch
{
return(false);
}
return(true);
}