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Fix issue with conflicted mempool tx in listsinceblock#8757

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jonasschnelli wants to merge 1 commit intobitcoin:masterfrom
jonasschnelli:2016/09/listsinceblock
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Fix issue with conflicted mempool tx in listsinceblock#8757
jonasschnelli wants to merge 1 commit intobitcoin:masterfrom
jonasschnelli:2016/09/listsinceblock

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@jonasschnelli
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@jonasschnelli jonasschnelli commented Sep 19, 2016

Attempt to fix #8752

The second parameter (target confirmation) is quite strange and should probably be better documented in the RPC help of listsinceblock (check original comment: #199 (comment))

At the moment, conflicted mempool transactions (double spends) are listed. This PR does hide all wtxs that are conflicts (GetDepthInMainChain <= -1).

@jonasschnelli jonasschnelli mentioned this pull request Sep 19, 2016
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@maflcko maflcko added this to the 0.13.1 milestone Sep 19, 2016
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FrozenPrincess commented Sep 19, 2016

Just to clarify:

This PR does hide all wtxs that are conflicts (GetDepthInMainChain <= -1).

Does this hide all wtxs that are conflicts, or just wtxs that conflict before block x (when you're filtering for transactions since block x)?

(Because I am, and know other people currently relying on listsinceblock to return conflicted transactions to detect when we've been double-spent against)

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maflcko commented Sep 19, 2016

I think it would help to add some tests for this.

@jonasschnelli
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jonasschnelli commented Sep 20, 2016

@FrozenPrincess: this PR just hides all wallet transactions that are unconfirmed and not in your mempool (very likely conflicted).
I guess this would be the expected behavior according to the RPC help description:

Get all transactions in blocks since block [blockhash][...]

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FrozenPrincess commented Sep 20, 2016

@FrozenPrincess: this PR just hides all wallet transactions that are unconfirmed and not in your mempool (very likely conflicted).

In that case, I'm strongly against this change of behavior. Currently if you have a service that processes bitcoin payments, you just need to run a loop (pseudo code):

lastHash = null
while (true ) {
   transactions, lastHash = bitcoin-cli listsinceblock $lastHash 6
   for transaction in transactions {
        if transaction.category == "receive" {
          if transaction.confirmations == 0 {
               // new mempool entry, notify the user or something
          }
          if transaction.confirmations > 0 {
             //  new confirmed transaction, add it
          }
          if transaction.confirmations < 0 {
            // shit, we've been double-spent. make sure to handle this!
         }
     }
  }
}

But if you change the behavior to filter out the conflicted transactions -- you will silently break peoples (including my) logic for knowing when they've been double-spent against. This is especially important now with bip125

@jonasschnelli jonasschnelli removed this from the 0.13.1 milestone Sep 22, 2016
@mchrostowski mchrostowski mentioned this pull request May 27, 2017
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@RHavar
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RHavar commented Jun 22, 2017

I think this should be closed in favor of #10470, which I believe fixes it properly =)

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jonasschnelli commented Sep 29, 2017

Closing in favor of #10470

@adamjonas adamjonas mentioned this pull request Oct 25, 2019
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meshcollider added a commit that referenced this pull request Nov 5, 2019
@meshcollider
Merge #17258: Fix issue with conflicted mempool tx in listsinceblock
bfc4c89 
436ad43 Fix issue with conflicted mempool tx in listsinceblock (Adam Jonas)

Pull request description:

  Closes #8752 by bringing back abandoned #10470.

  This now checks that returned transactions are not conflicting with any transactions that are filtered out by the given blockhash and add a functional test to prevent this in the future.

  For more context, #8757 was closed in favor of #10470.

ACKs for top commit:
  instagibbs:
    utACK 436ad43
  kallewoof:
    utACK 436ad43
  jonatack:
    I'm not qualifed to give an ACK here but 436ad43 appears reasonable. Built/ran tests/verified that this test fails without the change in rpcwallet.cpp:

Tree-SHA512: 63d75cd3d3f19fc84dc38899b200c96179b82b24db263cd0116ee5b715265be647157855c2e35912d2fbc49c7b37db9375d6aab0ac672f0f09bece8431de5ea9
sidhujag pushed a commit to syscoin/syscoin that referenced this pull request Nov 7, 2019
@meshcollider
Merge bitcoin#17258: Fix issue with conflicted mempool tx in listsinc…
c06d501 
…eblock

436ad43 Fix issue with conflicted mempool tx in listsinceblock (Adam Jonas)

Pull request description:

  Closes bitcoin#8752 by bringing back abandoned bitcoin#10470.

  This now checks that returned transactions are not conflicting with any transactions that are filtered out by the given blockhash and add a functional test to prevent this in the future.

  For more context, bitcoin#8757 was closed in favor of bitcoin#10470.

ACKs for top commit:
  instagibbs:
    utACK bitcoin@436ad43
  kallewoof:
    utACK 436ad43
  jonatack:
    I'm not qualifed to give an ACK here but 436ad43 appears reasonable. Built/ran tests/verified that this test fails without the change in rpcwallet.cpp:

Tree-SHA512: 63d75cd3d3f19fc84dc38899b200c96179b82b24db263cd0116ee5b715265be647157855c2e35912d2fbc49c7b37db9375d6aab0ac672f0f09bece8431de5ea9
sidhujag pushed a commit to syscoin-core/syscoin that referenced this pull request Nov 10, 2020
@meshcollider
Merge bitcoin#17258: Fix issue with conflicted mempool tx in listsinc…
cc82e86 
…eblock

436ad43 Fix issue with conflicted mempool tx in listsinceblock (Adam Jonas)

Pull request description:

  Closes bitcoin#8752 by bringing back abandoned bitcoin#10470.

  This now checks that returned transactions are not conflicting with any transactions that are filtered out by the given blockhash and add a functional test to prevent this in the future.

  For more context, bitcoin#8757 was closed in favor of bitcoin#10470.

ACKs for top commit:
  instagibbs:
    utACK bitcoin@436ad43
  kallewoof:
    utACK 436ad43
  jonatack:
    I'm not qualifed to give an ACK here but 436ad43 appears reasonable. Built/ran tests/verified that this test fails without the change in rpcwallet.cpp:

Tree-SHA512: 63d75cd3d3f19fc84dc38899b200c96179b82b24db263cd0116ee5b715265be647157855c2e35912d2fbc49c7b37db9375d6aab0ac672f0f09bece8431de5ea9
@bitcoin bitcoin locked as resolved and limited conversation to collaborators Dec 16, 2021
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rpc listsinceblock hash is not correctly filtering double-spends

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@jonasschnelli @FrozenPrincess @maflcko @RHavar