public override void Deserialize(BinaryReader reader)
{
byte version = reader.ReadByte();
if (version > StateVersion)
{
throw new FormatException();
}
Hash = reader.ReadSerializable <UInt160>();
Name = reader.ReadVarString();
Owner = ECPoint.DeserializeFrom(reader, ECCurve.Secp256r1);
Type = (AppChainType)reader.ReadByte();
Timestamp = reader.ReadUInt32();
LastModified = version >= 1 ? reader.ReadUInt32() : Timestamp;
SeedList = new string[reader.ReadVarInt()];
for (int i = 0; i < SeedList.Length; i++)
{
SeedList[i] = reader.ReadVarString();
}
StandbyValidators = new ECPoint[reader.ReadVarInt()];
for (int i = 0; i < StandbyValidators.Length; i++)
{
StandbyValidators[i] = ECPoint.DeserializeFrom(reader, ECCurve.Secp256r1);
}
}
void ICloneable <AppChainState> .FromReplica(AppChainState replica)
{
Hash = replica.Hash;
Name = replica.Name;
Owner = replica.Owner;
Type = replica.Type;
Timestamp = replica.Timestamp;
LastModified = replica.LastModified;
SeedList = replica.SeedList;
StandbyValidators = replica.StandbyValidators;
_names = replica._names;
}
public AppChainState(UInt160 hash)
{
this.StateVersion = 1;
this.Hash = hash;
this.Name = "";
this.Owner = ECCurve.Secp256r1.Infinity;
this.Type = AppChainType.None;
this.Timestamp = 0;
this.LastModified = 0;
this.SeedList = new string[0];
this.StandbyValidators = new ECPoint[0];
}
public void CopyFrom(AppChainState state)
{
Hash = state.Hash;
Name = state.Name;
Owner = state.Owner;
Type = state.Type;
Timestamp = state.Timestamp;
LastModified = state.LastModified;
SeedList = state.SeedList;
StandbyValidators = state.StandbyValidators;
_names = state._names;
}
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);
}
