dawn/updater/manifest_ldiff.proto

/*
	File taken from GitHub user Lightczx (DGP-Studio/Snap.Hutao/issues/2446)
	That repository is licensed under MIT, thus assuming the same for this comment.
*/

syntax = "proto3";

message DiffManifest {
	repeated DiffFileInfo files = 1;
	repeated DeleteFile files_delete = 2;
}

message DiffFileInfo {
	string filename = 1; // Path to the file relative to the game directory
	int32 size = 2;      // Size of the entire file
	string hash = 3;     // md5 file hash AFTER patching
	repeated Patch patches = 4;
}

message Patch {
	string key = 1;	 // Game version, e.g. "5.5.0" or "5.4.0" (when updating to "5.6.0")
	PatchInfo info = 2;
}

// A patch file usually contains multiple concatenated hpatchz files, thus
// this structure describes which section of the file patches which game file.
message PatchInfo {
	// File hash on disk "[8 bytes -> hex]_[16 bytes -> hex]" and
	// the "suffix" for the URL found in getPatchBuild -> '.data.manifests.[N].diff_download.url_prefix'
	// The official launcher uses the same naming scheme.
	string patch_id = 1;     // unique identifier (hash)
	string tag = 2;	         // same as `Patch.key`
	string build_id = 3;     // same as in the getBuild API (unused in this script)

	int64  patch_size = 4;   // in bytes
	string patch_name  = 5;  // = "[8 bytes -> hex]" from 'id' above
	int64  patch_offset = 6; // in bytes
	int64  patch_length = 7; // in bytes

	string original_name = 8;  // relative game file path to patch
	int64  original_size = 9;  // in bytes
	string original_hash = 10; // md5 file hash BEFORE patching
}

message DeleteFile
{
	string key = 1;       // same as `Patch.key`
	DeleteFiles info = 2;
}

message DeleteFiles
{
	repeated DeleteFileInfo list = 1;
}

message DeleteFileInfo
{
	string filename = 1; // relative game file path
	int64  size = 2;     // file size
	string hash = 3;     // md5
}