private void Persist(Block block)
{
using (Snapshot snapshot = GetSnapshot())
{
snapshot.PersistingBlock = block;
snapshot.Blocks.Add(block.Hash, new BlockState
{
SystemFeeAmount = snapshot.GetSysFeeAmount(block.PrevHash) + (long)block.Transactions.Sum(p => p.SystemFee),
TrimmedBlock = block.Trim()
});
foreach (Transaction tx in block.Transactions)
{
snapshot.Transactions.Add(tx.Hash, new TransactionState
{
BlockIndex = block.Index,
Transaction = tx
});
snapshot.UnspentCoins.Add(tx.Hash, new UnspentCoinState
{
Items = Enumerable.Repeat(CoinState.Confirmed, tx.Outputs.Length).ToArray()
});
foreach (TransactionOutput output in tx.Outputs)
{
AccountState account = snapshot.Accounts.GetAndChange(output.ScriptHash, () => new AccountState(output.ScriptHash));
if (account.Balances.ContainsKey(output.AssetId))
{
account.Balances[output.AssetId] += output.Value;
}
else
{
account.Balances[output.AssetId] = output.Value;
}
if (output.AssetId.Equals(GoverningToken.Hash) && account.Votes.Length > 0)
{
foreach (ECPoint pubkey in account.Votes)
{
snapshot.Validators.GetAndChange(pubkey, () => new ValidatorState(pubkey)).Votes += output.Value;
}
snapshot.ValidatorsCount.GetAndChange().Votes[account.Votes.Length - 1] += output.Value;
}
}
foreach (var group in tx.Inputs.GroupBy(p => p.PrevHash))
{
TransactionState tx_prev = snapshot.Transactions[group.Key];
foreach (CoinReference input in group)
{
snapshot.UnspentCoins.GetAndChange(input.PrevHash).Items[input.PrevIndex] |= CoinState.Spent;
TransactionOutput out_prev = tx_prev.Transaction.Outputs[input.PrevIndex];
AccountState account = snapshot.Accounts.GetAndChange(out_prev.ScriptHash);
if (out_prev.AssetId.Equals(GoverningToken.Hash))
{
snapshot.SpentCoins.GetAndChange(input.PrevHash, () => new SpentCoinState
{
TransactionHash = input.PrevHash,
TransactionHeight = tx_prev.BlockIndex,
Items = new Dictionary <ushort, uint>()
}).Items.Add(input.PrevIndex, block.Index);
if (account.Votes.Length > 0)
{
foreach (ECPoint pubkey in account.Votes)
{
ValidatorState validator = snapshot.Validators.GetAndChange(pubkey);
validator.Votes -= out_prev.Value;
if (!validator.Registered && validator.Votes.Equals(Fixed8.Zero))
{
snapshot.Validators.Delete(pubkey);
}
}
snapshot.ValidatorsCount.GetAndChange().Votes[account.Votes.Length - 1] -= out_prev.Value;
}
}
account.Balances[out_prev.AssetId] -= out_prev.Value;
}
}
List <ApplicationExecutionResult> execution_results = new List <ApplicationExecutionResult>();
switch (tx)
{
#pragma warning disable CS0612
case RegisterTransaction tx_register:
snapshot.Assets.Add(tx.Hash, new AssetState
{
AssetId = tx_register.Hash,
AssetType = tx_register.AssetType,
Name = tx_register.Name,
Amount = tx_register.Amount,
Available = Fixed8.Zero,
Precision = tx_register.Precision,
Fee = Fixed8.Zero,
FeeAddress = new UInt160(),
Owner = tx_register.Owner,
Admin = tx_register.Admin,
Issuer = tx_register.Admin,
Expiration = block.Index + 2 * 2000000,
IsFrozen = false
});
break;
#pragma warning restore CS0612
case IssueTransaction _:
foreach (TransactionResult result in tx.GetTransactionResults().Where(p => p.Amount < Fixed8.Zero))
{
snapshot.Assets.GetAndChange(result.AssetId).Available -= result.Amount;
}
break;
case ClaimTransaction _:
foreach (CoinReference input in ((ClaimTransaction)tx).Claims)
{
if (snapshot.SpentCoins.TryGet(input.PrevHash)?.Items.Remove(input.PrevIndex) == true)
{
snapshot.SpentCoins.GetAndChange(input.PrevHash);
}
}
break;
#pragma warning disable CS0612
case EnrollmentTransaction tx_enrollment:
snapshot.Validators.GetAndChange(tx_enrollment.PublicKey, () => new ValidatorState(tx_enrollment.PublicKey)).Registered = true;
break;
#pragma warning restore CS0612
case StateTransaction tx_state:
foreach (StateDescriptor descriptor in tx_state.Descriptors)
{
switch (descriptor.Type)
{
case StateType.Account:
ProcessAccountStateDescriptor(descriptor, snapshot);
break;
case StateType.Validator:
ProcessValidatorStateDescriptor(descriptor, snapshot);
break;
}
}
break;
#pragma warning disable CS0612
case PublishTransaction tx_publish:
snapshot.Contracts.GetOrAdd(tx_publish.ScriptHash, () => new ContractState
{
Script = tx_publish.Script,
ParameterList = tx_publish.ParameterList,
ReturnType = tx_publish.ReturnType,
ContractProperties = (ContractPropertyState)Convert.ToByte(tx_publish.NeedStorage),
Name = tx_publish.Name,
CodeVersion = tx_publish.CodeVersion,
Author = tx_publish.Author,
Email = tx_publish.Email,
Description = tx_publish.Description
});
break;
#pragma warning restore CS0612
case InvocationTransaction tx_invocation:
using (ApplicationEngine engine = new ApplicationEngine(TriggerType.Application, tx_invocation, snapshot.Clone(), tx_invocation.Gas))
{
engine.LoadScript(tx_invocation.Script);
if (engine.Execute())
{
engine.Service.Commit();
}
execution_results.Add(new ApplicationExecutionResult
{
Trigger = TriggerType.Application,
ScriptHash = tx_invocation.Script.ToScriptHash(),
VMState = engine.State,
GasConsumed = engine.GasConsumed,
Stack = engine.ResultStack.ToArray(),
Notifications = engine.Service.Notifications.ToArray()
});
}
break;
}
if (execution_results.Count > 0)
{
Distribute(new ApplicationExecuted
{
Transaction = tx,
ExecutionResults = execution_results.ToArray()
});
}
}
snapshot.BlockHashIndex.GetAndChange().Hash = block.Hash;
snapshot.BlockHashIndex.GetAndChange().Index = block.Index;
if (block.Index == header_index.Count)
{
header_index.Add(block.Hash);
snapshot.HeaderHashIndex.GetAndChange().Hash = block.Hash;
snapshot.HeaderHashIndex.GetAndChange().Index = block.Index;
}
snapshot.Commit();
}
UpdateCurrentSnapshot();
OnPersistCompleted(block);
}