syntax = "proto3";

option go_package = "mfer";

message MFFile {
    enum Version {
        NONE = 0;
        ONE = 1; // only one for now
    }
    Version version = 1;
    bytes innerMessage = 2;

    // these are used solely to detect corruption/truncation
    // and not for cryptographic integrity.
    uint64 size = 3;
    bytes sha256 = 4;

    // think we might use gosignify instead of gpg:
    // github.com/frankbraun/gosignify

    //detached signature, ascii or binary
    optional bytes signature = 5;
    //full GPG key id
    optional bytes signer = 6;
    //full GPG signing public key, ascii or binary
    optional bytes signingPubKey = 7;
}

message MFFilePath {
    string path = 1;
    uint64 size = 2;
    // when verifying, count(hashes) must be > 0.
    optional repeated MFFileChecksum hashes = 201;
    optional string mimeType = 101;
    optional string mtime = 102;
    optional string ctime = 103;
    optional string atime = 104;

}

message MFFileChecksum {
    bytes multiHash = 1;
}

message MFFileInner {
    enum Version {
        NONE = 0;
        ONE = 1; // only one for now
    }
    Version version = 1;
    uint64 count = 2;
    repeated MFFilePath files = 3;
}