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https://github.com/daydreamer-json/ak-endfield-api-archive.git
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49 lines
2.5 KiB
Markdown
49 lines
2.5 KiB
Markdown
# MEMO
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This file contains my personal notes. Most of it isn't particularly useful, but it might come in handy for someone.
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## Regarding the Game Package Patch Update v2 Format
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Although removed from the archived data, keys indicating the implementation of the v2 format appeared in the JSON data even before the `v1.2.4` update.
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The keys were first observed on the China channel at `2026-04-09T08:15:27.604+00:00` and on the Global channel at `2026-04-11T04:15:27.695+00:00`.
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Initially, the `patch` object contained empty data: `{ "v2_patch_info_url": "", "v2_patch_info_size": "0", "v2_patch_info_md5": "" }`.
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Upon the release of the `v1.2.4` update, the official URL, size, and MD5 values began to be returned.
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### `patch.json` Specifications
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**Note:** These are based partly on conjecture.
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```typescript
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export interface Root {
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version: string; // e.g., 1.2.4
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vfs_base_path: string; // e.g., Endfield_Data/StreamingAssets/VFS
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files: File[];
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}
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export interface File {
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name: string; // e.g., C3442D43/223F9ED9DB4013D27E6FB3B78623E051.chk
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name_path: string; // ""
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md5: string; // e.g., 1ceb1c5aaf4dace09f3ec359c78f0501
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size: number; // e.g., 4516428
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diffType: 1 | 2; // 1=chk?, 2=blk?
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local_path?: string; // e.g., vfs_files/files/Endfield_Data/StreamingAssets/VFS/775A31D1/449D95744A00F33BD9C304EF1E72A534.chk
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patch?: Patch[];
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}
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export interface Patch {
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base_file: string; // e.g., C3442D43/47D0EB2D178F6E81EE4D0226E0806AB9.chk
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base_file_path: string; // ""
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base_md5: string; // e.g., dac0d4c6a910fb4e1000d9414cd1ee4b
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base_size: number; // e.g., 4518476
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patch: string; // e.g., diff_1.2.4_1.1.9/C3442D43_223F9ED9DB4013D27E6FB3B78623E051.chk_patch
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patch_path: string; // ""
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patch_size: number; // e.g., 136568
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}
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```
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- **If `local_path` does not exist and `patch` does not exist:** No action is taken.
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- **If `local_path` exists and `patch` does not exist (Incremental):** A new file exists. Copy the file located at `local_path` within the patch data to `${vfs_base_path}/${files[number].name}`.
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- **If `local_path` does not exist and `patch` exists (Differential):** A difference exists. Using `${vfs_base_path}/${files[number].base_file}` as the source file, apply the patch found at `vfs_files/vfs_patch/${files[number].patch[number].patch}` in the patch data and write the result to `${vfs_base_path}/${files[number].name}`. [HDiffPatch](https://github.com/sisong/HDiffPatch) is used for applying the differential.
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- **If both `local_path` and `patch` exist:** This scenario is currently not possible.
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