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consensus: Fix 20230904 testnet forking issue #2703

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jamescowens
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@jamescowens jamescowens commented Sep 17, 2023

@div72's current explanation for what is going wrong...

"I guess the crux of the issue lies in the fact that txs of orphan blocks are not present in the txleveldb. So if a node receives a side-chain that's longer than the part of main chain where there's a specific transaction used (which is created after the forking point), the block which references the transaction becomes invalid until a re-org is done up to that block (so that the tx which is referenced is accepted once gets in to txleveldb). This never happens in this scenario as the side chain's chain trust exceeds the part of main chain up to that affected block. (I could not simplify that explanation and I also have trouble parsing this paragraph, so I'm going to write up an example in a minute.)"

What this PR does is adds a fallback lookup for the transaction in the block file if it is not found in the index. This is very slow but will be rare under normal circumstances. This PR is meant to be a short term workaround ("band-aid") until we can devise a more elegant fix.

@jamescowens jamescowens self-assigned this Sep 17, 2023
@jamescowens jamescowens changed the title Fix 20230904 testnet forking issue consensus: Fix 20230904 testnet forking issue Sep 17, 2023
@jamescowens jamescowens added this to the Miss Piggy milestone Sep 17, 2023
@jamescowens jamescowens force-pushed the fix_20230904_testnet_forking_issue branch from 4bbbf28 to 9c10ede Compare September 17, 2023 19:47
@jamescowens jamescowens marked this pull request as ready for review September 18, 2023 03:38
@jamescowens jamescowens merged commit 3f1c5ef into gridcoin-community:development Sep 18, 2023
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jamescowens added a commit to jamescowens/Gridcoin-Research that referenced this pull request Mar 2, 2024
Added
 - contrib: add nix file for compilation environment gridcoin-community#2660 (@div72)
 - gui: Make main Gridcoin window geometry save unique to datadir location gridcoin-community#2661 (@jamescowens)
 - build: Initial CMake support gridcoin-community#2676 (@CyberTailor)
 - util: Add `-shutdownnotify` and `startupnotify` options from upstream gridcoin-community#2688 (@barton2526)
 - gui, staking: Implement facilities for mandatory sidestakes and sidestake GUI gridcoin-community#2704 (@jamescowens)
 - gui, voting: Implement poll result caching and poll stale indicator gridcoin-community#2709 (@jamescowens)
 - gui, projects: Implement greylist state for projects in GUI projects table gridcoin-community#2715 (@jamescowens)
 - gui, poll: Implement poll expiration reminders gridcoin-community#2716 (@jamescowens)
 - serialize: allow variants to be serialized gridcoin-community#2729 (@div72)
 - gui: Implement poll field length limiters in GUI forms gridcoin-community#2742 (@jamescowens)

Changed
 - consensus, contract, scraper, protocol, project, beacon, rpc: Replace remaining appcache sections with native structures gridcoin-community#2639 (@jamescowens)
 - build: update libsecp256k1 to v0.3.0 gridcoin-community#2655 (@div72)
 - build: Replace $(AT) with .SILENT gridcoin-community#2674 (@barton2526)
 - build: allow system bdb gridcoin-community#2675 (@div72)
 - Resize Header Column with Additional Text gridcoin-community#2683 (@PrestackI)
 - rpc: use RPCErrorCode everywhere gridcoin-community#2687 (@Pythonix)
 - wallet: SecureString to allow null characters gridcoin-community#2690 (@barton2526)
 - random: port some upstream changes gridcoin-community#2696 (@div72)
 - depends: Bump dependencies gridcoin-community#2692 (@barton2526)
 - doc: Update link to Discord server gridcoin-community#2693 (@adriaanjoubert)
 - rpc: Change capitalization, remove whitespace of rpc keys gridcoin-community#2711 (@Pythonix)
 - ci: bump MacOS version to 12 gridcoin-community#2713 (@div72)
 - depends: no-longer nuke libc++abi.so* in native_clang package gridcoin-community#2719 (@div72)
 - doc: update windows `-fstack-clash-protection` doc gridcoin-community#2720 (@div72)
 - Silence `-Wcast-function-type` warning gridcoin-community#2721 (@div72)
 - build: Use newest `config.{guess,sub}` available gridcoin-community#2722 (@div72)
 - refactor: use the try_lock result in TryEnter gridcoin-community#2723 (@div72)
 - Updates for file src/qt/locale/bitcoin_en.ts in pt_PT gridcoin-community#2726 (@gridcoin-community)
 - ci: do not silently fail gridcoin-community#2727 (@div72)
 - Properly include Boost Array header gridcoin-community#2730 (@theMarix)
 - build: Update depends zlib to 1.3.1 gridcoin-community#2734 (@jamescowens)
 - util: Enhance Fraction class overflow resistance gridcoin-community#2735 (@jamescowens)
 - refactor: Fix compilation warnings gridcoin-community#2737 (@jamescowens)
 - gui, util: Improve upgrade dialog gridcoin-community#2738 (@jamescowens)
 - util: Improve allocation class gridcoin-community#2740 (@jamescowens)
 - translations: translation updates for Miss Piggy release gridcoin-community#2745 (@jamescowens)

Removed
 - gui: Disable snapshot GUI action gridcoin-community#2700 (@jamescowens)
 - build, crypto, script: remove most of OpenSSL usage gridcoin-community#2705 (@div72)
 - util: remove WSL 1 workaround in fs gridcoin-community#2717 (@div72)

Fixed
 - diagnostics: fix missing arg in ETTS warning gridcoin-community#2684 (@div72)
 - misc: fix include guard in netaddress.h gridcoin-community#2695 (@div72)
 - gui: Fix expired pending beacon display gridcoin-community#2698 (@jamescowens)
 - consensus: Fix 20230904 testnet forking issue gridcoin-community#2703 (@jamescowens)
 - gui: Fix filter by type in Transaction View gridcoin-community#2708 (@jamescowens)
 - depends: make fontconfig build under clang-16 gridcoin-community#2718 (@div72)
 - diag: fix researcher mode check gridcoin-community#2725 (@div72)
 - gui: Add missing switch cases for ALREADY_IN_MEMPOOL gridcoin-community#2728 (@jamescowens)
 - beacon, registry: Fix beacon history stall gridcoin-community#2731 (@jamescowens)
 - build: Implement comp_double comparison function in certain tests gridcoin-community#2741 (@jamescowens)
 - ci: change Qt path in CMake CI gridcoin-community#2743 (@div72)
 - net: Correct -tor argument handling gridcoin-community#2744 (@jamescowens)
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