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‎.gitignore‎

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bin/
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obj/
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.vs/
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.claude/
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*.user
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Properties/
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oodle-data-shared.dll

‎.gitmodules‎

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[submodule "CUE4Parse"]
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path = CUE4Parse
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url = https://github.com/FabianFG/CUE4Parse.git

‎CUE4Parse‎

Submodule CUE4Parse added at e482971

‎README.md‎

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# RepSeedResolver
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UE5 Blueprint replication handle & net field resolver, built on [CUE4Parse](https://github.com/FabianFG/CUE4Parse).
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Scans `.pak` files to discover Blueprint classes and resolves their replication layout handles and ClassNetCache indices using C++ seed data from [RepSeedDumper](https://github.com/Starter-Pack/Dumper-7).
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<img src="assets/screenshot-log.png" width="600"/>
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<img src="assets/screenshot-results.png" width="600"/>
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## Output
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Produces two JSON files:
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- `rep_layout.json` — Per-class replication property handles with 1-based indices, inheriting from the C++ seed and appending BP-defined replicated properties
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- `class_net_cache.json` — Per-class net field export indices, combining seed net fields with BP properties and RPCs
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## Build
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```
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git clone --recurse-submodules https://github.com/Mokocoder/RepSeedResolver.git
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dotnet publish -c Release
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```
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## Usage
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1. Set Paks Dir to the game's pak folder
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2. Load Seed JSON (`replication_seed.json` from RepSeedDumper)
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3. Select Game version
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4. (Optional) Load `.usmap` mappings
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5. Click Run
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## How it works
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1. CUE4Parse mounts the game's pak files and loads mappings
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2. Scans all packages for `UBlueprintGeneratedClass` exports using the global script object index for fast filtering
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3. For each BP class, collects replicated properties (`EPropertyFlags::Net`) and net RPCs (`FUNC_Net`)
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4. Walks the BP inheritance chain to find the C++ ancestor in the seed data
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5. Appends BP handles after the C++ seed handles, preserving UE's `FRepLayout` wire ordering
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6. Accumulates net field counts up the chain to produce correct `ClassNetCache` max indices

‎RepSeedResolver.sln‎

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Microsoft Visual Studio Solution File, Format Version 12.00
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# Visual Studio Version 17
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VisualStudioVersion = 17.0.0.0
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MinimumVisualStudioVersion = 10.0.40219.1
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Project("{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}") = "RepSeedResolver", "RepSeedResolver\RepSeedResolver.csproj", "{A1B2C3D4-E5F6-7890-ABCD-EF1234567890}"
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EndProject
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Project("{2150E333-8FDC-42A3-9474-1A3956D46DE8}") = "CUE4Parse", "CUE4Parse", "{6B5F23C8-25B8-33E9-C6F8-A53632F5B30D}"
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EndProject
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Project("{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}") = "CUE4Parse", "CUE4Parse\CUE4Parse\CUE4Parse.csproj", "{EB8112D2-21E3-4AC5-91F7-5C827374F194}"
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EndProject
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Global
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GlobalSection(SolutionConfigurationPlatforms) = preSolution
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Debug|Any CPU = Debug|Any CPU
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Debug|x64 = Debug|x64
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Debug|x86 = Debug|x86
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Release|Any CPU = Release|Any CPU
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Release|x64 = Release|x64
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Release|x86 = Release|x86
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EndGlobalSection
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GlobalSection(ProjectConfigurationPlatforms) = postSolution
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{A1B2C3D4-E5F6-7890-ABCD-EF1234567890}.Debug|Any CPU.ActiveCfg = Debug|Any CPU
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{A1B2C3D4-E5F6-7890-ABCD-EF1234567890}.Debug|Any CPU.Build.0 = Debug|Any CPU
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{A1B2C3D4-E5F6-7890-ABCD-EF1234567890}.Debug|x64.ActiveCfg = Debug|Any CPU
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{A1B2C3D4-E5F6-7890-ABCD-EF1234567890}.Debug|x64.Build.0 = Debug|Any CPU
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{A1B2C3D4-E5F6-7890-ABCD-EF1234567890}.Debug|x86.ActiveCfg = Debug|Any CPU
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{A1B2C3D4-E5F6-7890-ABCD-EF1234567890}.Debug|x86.Build.0 = Debug|Any CPU
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{A1B2C3D4-E5F6-7890-ABCD-EF1234567890}.Release|Any CPU.ActiveCfg = Release|Any CPU
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{A1B2C3D4-E5F6-7890-ABCD-EF1234567890}.Release|Any CPU.Build.0 = Release|Any CPU
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{A1B2C3D4-E5F6-7890-ABCD-EF1234567890}.Release|x64.ActiveCfg = Release|Any CPU
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{A1B2C3D4-E5F6-7890-ABCD-EF1234567890}.Release|x64.Build.0 = Release|Any CPU
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{A1B2C3D4-E5F6-7890-ABCD-EF1234567890}.Release|x86.ActiveCfg = Release|Any CPU
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{A1B2C3D4-E5F6-7890-ABCD-EF1234567890}.Release|x86.Build.0 = Release|Any CPU
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{EB8112D2-21E3-4AC5-91F7-5C827374F194}.Debug|Any CPU.ActiveCfg = Debug|Any CPU
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{EB8112D2-21E3-4AC5-91F7-5C827374F194}.Debug|Any CPU.Build.0 = Debug|Any CPU
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{EB8112D2-21E3-4AC5-91F7-5C827374F194}.Debug|x64.ActiveCfg = Debug|Any CPU
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{EB8112D2-21E3-4AC5-91F7-5C827374F194}.Debug|x64.Build.0 = Debug|Any CPU
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{EB8112D2-21E3-4AC5-91F7-5C827374F194}.Debug|x86.ActiveCfg = Debug|Any CPU
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{EB8112D2-21E3-4AC5-91F7-5C827374F194}.Debug|x86.Build.0 = Debug|Any CPU
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{EB8112D2-21E3-4AC5-91F7-5C827374F194}.Release|Any CPU.ActiveCfg = Release|Any CPU
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{EB8112D2-21E3-4AC5-91F7-5C827374F194}.Release|Any CPU.Build.0 = Release|Any CPU
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{EB8112D2-21E3-4AC5-91F7-5C827374F194}.Release|x64.ActiveCfg = Release|Any CPU
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{EB8112D2-21E3-4AC5-91F7-5C827374F194}.Release|x64.Build.0 = Release|Any CPU
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{EB8112D2-21E3-4AC5-91F7-5C827374F194}.Release|x86.ActiveCfg = Release|Any CPU
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{EB8112D2-21E3-4AC5-91F7-5C827374F194}.Release|x86.Build.0 = Release|Any CPU
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EndGlobalSection
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GlobalSection(SolutionProperties) = preSolution
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HideSolutionNode = FALSE
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EndGlobalSection
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GlobalSection(NestedProjects) = preSolution
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{EB8112D2-21E3-4AC5-91F7-5C827374F194} = {6B5F23C8-25B8-33E9-C6F8-A53632F5B30D}
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EndGlobalSection
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GlobalSection(ExtensibilityGlobals) = postSolution
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SolutionGuid = {2AE41AA3-C729-41B9-806D-82EF1B70F2AC}
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EndGlobalSection
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EndGlobal

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