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Add ContainsTransaction Recheck when ParallelVerifiedTransaction Received #1408

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merged 7 commits into from
Jan 13, 2020
Merged

Add ContainsTransaction Recheck when ParallelVerifiedTransaction Received #1408

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c3170c7
add containsTx recheck
eryeer Jan 13, 2020
eb2a0b2
add UT
eryeer Jan 13, 2020
08d46b6
Update to just View check
vncoelho Jan 13, 2020
1beaeed
update
eryeer Jan 13, 2020
6cbdde1
Merge branch 'containTx_recheck' of github.com:eryeer/neoUT into cont…
eryeer Jan 13, 2020
a3aa537
revert
eryeer Jan 13, 2020
c4f39ba
Update UT_Blockchain.cs
eryeer Jan 13, 2020
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4 changes: 3 additions & 1 deletion src/neo/Ledger/Blockchain.cs
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Original file line number Diff line number Diff line change
Expand Up @@ -429,7 +429,9 @@ private void OnParallelVerified(ParallelVerified parallelVerified)
RelayResultReason reason = parallelVerified.VerifyResult;
if (reason == RelayResultReason.Succeed)
{
if (!MemPool.CanTransactionFitInPool(parallelVerified.Transaction))
if (View.ContainsTransaction(parallelVerified.Transaction.Hash))
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It has been check in L403.

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@eryeer eryeer Jan 13, 2020 •
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@erikzhang But it cannot guarantee that transactions are not duplicated after asynchronous verification, because during the asynchronous verification process, there may be blocks containing the transaction that are persisted to storage.

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@vncoelho vncoelho Jan 13, 2020 •
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I think that he mentioned that it checks but meanwhile since it not thread safe a Block can be Persisted during the Asynchronous loop. But I am not sure if I understood correctly.

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@vncoelho vncoelho Jan 13, 2020 •
edited
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aehuahuea, we sent almost together, @eryeer.

reason = RelayResultReason.AlreadyExists;
else if (!MemPool.CanTransactionFitInPool(parallelVerified.Transaction))
reason = RelayResultReason.OutOfMemory;
else if (!MemPool.TryAdd(parallelVerified.Transaction.Hash, parallelVerified.Transaction))
reason = RelayResultReason.OutOfMemory;
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