diff --git a/.gitignore b/.gitignore
index a850995..ea71c99 100644
--- a/.gitignore
+++ b/.gitignore
@@ -124,3 +124,4 @@ coverage
 tempConv
 extracted.json
 tools
+docs
diff --git a/README.md b/README.md
new file mode 100644
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--- /dev/null
+++ b/README.md
@@ -0,0 +1,1674 @@
+# tg-file-decoder
+
+Decode [Telegram bot API file IDs](https://core.telegram.org).
+
+## Install
+
+```bash
+composer require danog/tg-file-decoder
+```
+
+On 32-bit systems, [phpseclib](https://github.com/phpseclib/phpseclib) is also required.
+
+## Examples:
+
+### Decoding bot API file IDs
+
+```php
+use danog\Decoder\FileId;
+use danog\Decoder\UniqueFileId;
+
+$fileId = FileId::fromBotAPI('CAACAgQAAxkDAAJEsl44nl3yxPZ8biI8uhaA7rbQceOSAAKtAQACsTisUXvMEbVnTuQkGAQ');
+
+$version = $fileId->getVersion(); // bot API file ID version, usually 4
+$subVersion = $fileId->getSubVersion(); // bot API file ID subversion, equivalent to a specific tdlib version
+
+$dcId = $fileId->getDcId(); // On which datacenter is this file stored
+
+$type = $fileId->getType(); // File type
+$typeName = $fileId->getType(); // File type (as string)
+
+$id = $fileId->getId();
+$accessHash = $fileId->getAccessHash();
+
+$fileReference = $fileId->getFileReference(); // File reference, https://core.telegram.org/api/file_reference
+$url = $fileId->getUrl(); // URL, file IDs with encoded webLocation
+
+// You can also use hasFileReference and hasUrl
+$fileIdReencoded = $fileId->getBotAPI(); // CAACAgQAAxkDAAJEsl44nl3yxPZ8biI8uhaA7rbQceOSAAKtAQACsTisUXvMEbVnTuQkGAQ
+$fileIdReencoded = (string) $fileId;     // CAACAgQAAxkDAAJEsl44nl3yxPZ8biI8uhaA7rbQceOSAAKtAQACsTisUXvMEbVnTuQkGAQ
+
+// For photos, thumbnails if ($fileId->getType() <= PHOTO)
+$volumeId = $fileId->getVolumeID();
+$localId = $fileId->getLocalID();
+
+// if $fileId->hasPhotoSizeSource()
+$photoSizeSource = $fileId->getPhotoSizeSource(); // PhotoSizeSource object
+$photoSizeSource->getDialogId();
+$photoSizeSource->getStickerSetId();
+
+// And more, depending on photosize source
+```
+
+The bot API subversion, present since file IDs v4, is equivalent to the [version of tdlib](https://github.com/tdlib/td/blob/master/td/telegram/Version.h#L13) used server-side in the bot API.
+
+For file types, see [file types](#bot-api-file-id-types).
+For photosize source, see [here](#photosize-source).
+
+### Decoding bot API unique file IDs
+
+```php
+$uniqueFileId = UniqueFileId::fromUniqueBotAPI('AgADrQEAArE4rFE');
+
+$type = $fileId->getType(); // Unique file type
+$typeName = $fileId->getType(); // Unique file type (as string)
+
+$id = $uniqueFileId->getId();
+$accessHash = $uniqueFileId->getAccessHash();
+$url = $uniqueFileId->getUrl(); // URL, for unique file IDs with encoded webLocation
+// You can also use hasUrl
+
+// For photos
+$volumeId = $uniqueFileId->getVolumeID();
+$localId = $uniqueFileId->getLocalID();
+```
+
+For unique file types, see [unique types](#bot-api-unique-file-id-types).
+
+### Extracting unique file IDs from full file IDs
+
+```php
+$full = 'CAACAgQAAxkDAAJEsl44nl3yxPZ8biI8uhaA7rbQceOSAAKtAQACsTisUXvMEbVnTuQkGAQ';
+$unique = 'AgADrQEAArE4rFE';
+
+$fileId = FileId::fromBotAPI($full);
+$uniqueFileId = UniqueFileId::fromUniqueBotAPI($unique);
+$uniqueFileIdExtracted1 = UniqueFileId::fromBotAPI($full);
+
+$uniqueFileIdExtracted2 = $fileId->getUniqueBotAPI();
+
+var_dump(((string) $uniqueFileId) === ((string) $uniqueFileIdExtracted1)); // true, always AgADrQEAArE4rFE!
+var_dump(((string) $uniqueFileId) === ((string) $uniqueFileIdExtracted2)); // true, always AgADrQEAArE4rFE!
+```
+
+### Photosize source
+
+```php
+$fileId = FileId::fromString('CAACAgQAAxkDAAJEsl44nl3yxPZ8biI8uhaA7rbQceOSAAKtAQACsTisUXvMEbVnTuQkGAQ');
+
+$photoSizeSource = $fileId->getPhotoSizeSource(); // PhotoSizeSource object
+
+$sourceType = $photoSizeSource->getType();
+
+// If 
+$dialogId = $photoSizeSource->getDialogId();
+$dialogId = $photoSizeSource->getStickerSetId();
+```
+
+### Building custom file IDs
+
+```php
+$fileId = new FileId;
+
+$fileId->setType(STICKER);
+$fileId->setId($id);
+$fileId->setAccessHash($customHash);
+
+// You get it...
+
+$encoded = (string) $fileId; // CAACAgQAAxkDAAJEsl44nl3yxPZ8biI8uhaA7rbQceOSAAKtAQACsTisUXvMEbVnTuQkGAQ, or something
+```
+
+All classes, from [FileId](#fileid), to [UniqueFileID](#uniquefileid), to [PhotoSizeSource](PhotoSizeSourceDialogPhoto) can be built using `set` methods for each and every field.
+
+
+### Bot API unique file ID types
+
+The file type is a numeric constant indicating the type of file, (the constant is always in the `danog\Decoder` namespace).
+The file type name is a string version of the file type, typically the one used in bot API file objects.  
+
+The `TYPES` array contains a `file type` => `file type name` map.
+The `TYPES_IDS` array contains a `file type name` => `file type` map.
+
+`const CONSTANTNAME = value` - Description (`type name`)
+
+* `const THUMBNAIL = 0` - Thumbnail (`thumbnail`)
+* `const PROFILE_PHOTO = 1` - Profile photo; used for users, supergroups and channels, chat photos are normal PHOTOs (`profile_photo`)
+* `const PHOTO = 2` - Photo (`photo`)
+* `const VOICE = 3` - Voice message (`voice`)
+* `const VIDEO = 4` - Video (`video`)
+* `const DOCUMENT = 5` - Document (`document`)
+* `const ENCRYPTED = 6` - Secret chat document (`encrypted`)
+* `const TEMP = 7` - Temp document (`temp`)
+* `const STICKER = 8` - Sticker (`sticker`)
+* `const AUDIO = 9` - Music (`audio`)
+* `const ANIMATION = 10` - GIF (`animation`)
+* `const ENCRYPTED_THUMBNAIL = 11` - Thumbnail of secret chat document (`encrypted_thumbnail`)
+* `const WALLPAPER = 12` - Wallpaper (`wallpaper`)
+* `const VIDEO_NOTE = 13` - Round video (`video_note`)
+* `const SECURE_RAW = 14` - Passport raw file (`secure_raw`)
+* `const SECURE = 15` - Passport file (`secure`)
+* `const WALLPAPER = 16` - Background (`background`)
+* `const WALLPAPER = 17` - Size (`size`)
+* `const NONE = 18` - 
+
+## Full API documentation
+
+* [FileId](#fileid) - Main file ID class
+    * [fromBotAPI](#frombotapi) 
+    * [getBotAPI](#getbotapi)
+    * [getUnique](#getunique)
+    * [getVersion](#getversion)
+    * [setVersion](#setversion)
+    * [getSubVersion](#getsubversion)
+    * [setSubVersion](#setsubversion)
+    * [getType](#gettype)
+    * [getTypeName](#gettypename)
+    * [setType](#settype)
+    * [getFileReference](#getfilereference)
+    * [setFileReference](#setfilereference)
+    * [hasFileReference](#hasfilereference)
+    * [getUrl](#geturl)
+    * [hasUrl](#hasurl)
+    * [setUrl](#seturl)
+    * [getId](#getid)
+    * [setId](#setid)
+    * [hasId](#hasid)
+    * [getAccessHash](#getaccesshash)
+    * [setAccessHash](#setaccesshash)
+    * [getVolumeId](#getvolumeid)
+    * [setVolumeId](#setvolumeid)
+    * [hasVolumeId](#hasvolumeid)
+    * [getLocalId](#getlocalid)
+    * [setLocalId](#setlocalid)
+    * [hasLocalId](#haslocalid)
+    * [getPhotoSizeSource](#getphotosizesource)
+    * [setPhotoSizeSource](#setphotosizesource)
+    * [hasPhotoSizeSource](#hasphotosizesource)
+    * [getDcId](#getdcid)
+    * [setDcId](#setdcid)
+* [PhotoSizeSourceDialogPhoto](#photosizesourcedialogphoto)
+    * [setType](#settype-1)
+    * [getDialogId](#getdialogid)
+    * [setDialogId](#setdialogid)
+    * [getDialogAccessHash](#getdialogaccesshash)
+    * [setDialogAccessHash](#setdialogaccesshash)
+    * [isSmallDialogPhoto](#issmalldialogphoto)
+    * [setDialogPhotoSmall](#setdialogphotosmall)
+* [PhotoSizeSourceLegacy](#photosizesourcelegacy)
+    * [setType](#settype-2)
+    * [getSecret](#getsecret)
+    * [setSecret](#setsecret)
+* [PhotoSizeSourceStickersetThumbnail](#photosizesourcestickersetthumbnail)
+    * [setType](#settype-3)
+    * [getStickerSetId](#getstickersetid)
+    * [setStickerSetId](#setstickersetid)
+    * [getStickerSetAccessHash](#getstickersetaccesshash)
+    * [setStickerSetAccessHash](#setstickersetaccesshash)
+* [PhotoSizeSourceThumbnail](#photosizesourcethumbnail)
+    * [setType](#settype-4)
+    * [getThumbFileType](#getthumbfiletype)
+    * [getThumbFileTypeString](#getthumbfiletypestring)
+    * [setThumbFileType](#setthumbfiletype)
+    * [getThumbType](#getthumbtype)
+    * [setThumbType](#setthumbtype)
+* [UniqueFileId](#uniquefileid)
+    * [__toString](#__tostring-1)
+    * [getUniqueBotAPI](#getuniquebotapi)
+    * [fromUniqueBotAPI](#fromuniquebotapi)
+    * [fromBotAPI](#frombotapi-1)
+    * [fromFileId](#fromfileid)
+    * [getTypeName](#gettypename-1)
+    * [getType](#gettype-1)
+    * [setType](#settype-5)
+    * [getId](#getid-1)
+    * [setId](#setid-1)
+    * [hasId](#hasid-1)
+    * [getVolumeId](#getvolumeid-1)
+    * [setVolumeId](#setvolumeid-1)
+    * [hasVolumeId](#hasvolumeid-1)
+    * [getLocalId](#getlocalid-1)
+    * [setLocalId](#setlocalid-1)
+    * [hasLocalId](#haslocalid-1)
+    * [getUrl](#geturl-1)
+    * [setUrl](#seturl-1)
+    * [hasUrl](#hasurl-1)
+
+## FileId
+
+Represents decoded bot API file ID.
+
+
+* Full name: \danog\Decoder\FileId
+
+
+### fromBotAPI
+
+Decode file ID from bot API file ID.
+
+```php
+FileId::fromBotAPI( string $fileId ): self
+```
+
+
+
+* This method is **static**.
+**Parameters:**
+
+| Parameter | Type | Description |
+|-----------|------|-------------|
+| `$fileId` | **string** | File ID |
+
+
+
+
+---
+
+### getBotAPI
+
+Get bot API file ID.
+
+```php
+FileId::getBotAPI(  ): string
+```
+
+
+
+
+
+
+
+---
+
+### getUnique
+
+Get unique file ID from file ID.
+
+```php
+FileId::getUnique(  ): \danog\Decoder\UniqueFileId
+```
+
+
+
+
+
+
+
+---
+
+### __toString
+
+Get bot API file ID.
+
+```php
+FileId::__toString(  ): string
+```
+
+
+
+
+
+
+
+---
+
+### getVersion
+
+Get bot API file ID version.
+
+```php
+FileId::getVersion(  ): integer
+```
+
+
+
+
+
+
+
+---
+
+### setVersion
+
+Set bot API file ID version.
+
+```php
+FileId::setVersion( integer $_version ): self
+```
+
+
+
+
+**Parameters:**
+
+| Parameter | Type | Description |
+|-----------|------|-------------|
+| `$_version` | **integer** | Bot API file ID version. |
+
+
+
+
+---
+
+### getSubVersion
+
+Get bot API file ID subversion.
+
+```php
+FileId::getSubVersion(  ): integer
+```
+
+
+
+
+
+
+
+---
+
+### setSubVersion
+
+Set bot API file ID subversion.
+
+```php
+FileId::setSubVersion( integer $_subVersion ): self
+```
+
+
+
+
+**Parameters:**
+
+| Parameter | Type | Description |
+|-----------|------|-------------|
+| `$_subVersion` | **integer** | Bot API file ID subversion. |
+
+
+
+
+---
+
+### getType
+
+Get file type.
+
+```php
+FileId::getType(  ): integer
+```
+
+
+
+
+
+
+
+---
+
+### getTypeName
+
+Get file type as string.
+
+```php
+FileId::getTypeName(  ): string
+```
+
+
+
+
+
+
+
+---
+
+### setType
+
+Set file type.
+
+```php
+FileId::setType( integer $_type ): self
+```
+
+
+
+
+**Parameters:**
+
+| Parameter | Type | Description |
+|-----------|------|-------------|
+| `$_type` | **integer** | File type. |
+
+
+
+
+---
+
+### getFileReference
+
+Get file reference.
+
+```php
+FileId::getFileReference(  ): string
+```
+
+
+
+
+
+
+
+---
+
+### setFileReference
+
+Set file reference.
+
+```php
+FileId::setFileReference( string $_fileReference ): self
+```
+
+
+
+
+**Parameters:**
+
+| Parameter | Type | Description |
+|-----------|------|-------------|
+| `$_fileReference` | **string** | File reference. |
+
+
+
+
+---
+
+### hasFileReference
+
+Check if has file reference.
+
+```php
+FileId::hasFileReference(  ): boolean
+```
+
+
+
+
+
+
+
+---
+
+### getUrl
+
+Get file URL for weblocation.
+
+```php
+FileId::getUrl(  ): string
+```
+
+
+
+
+
+
+
+---
+
+### hasUrl
+
+Check if has file URL.
+
+```php
+FileId::hasUrl(  ): boolean
+```
+
+
+
+
+
+
+
+---
+
+### setUrl
+
+Set file URL for weblocation.
+
+```php
+FileId::setUrl( string $_url ): self
+```
+
+
+
+
+**Parameters:**
+
+| Parameter | Type | Description |
+|-----------|------|-------------|
+| `$_url` | **string** | File URL for weblocation. |
+
+
+
+
+---
+
+### getId
+
+Get file id.
+
+```php
+FileId::getId(  ): integer
+```
+
+
+
+
+
+
+
+---
+
+### setId
+
+Set file id.
+
+```php
+FileId::setId( integer $_id ): self
+```
+
+
+
+
+**Parameters:**
+
+| Parameter | Type | Description |
+|-----------|------|-------------|
+| `$_id` | **integer** | File id. |
+
+
+
+
+---
+
+### hasId
+
+Check if has file id.
+
+```php
+FileId::hasId(  ): boolean
+```
+
+
+
+
+
+
+
+---
+
+### getAccessHash
+
+Get file access hash.
+
+```php
+FileId::getAccessHash(  ): integer
+```
+
+
+
+
+
+
+
+---
+
+### setAccessHash
+
+Set file access hash.
+
+```php
+FileId::setAccessHash( integer $_accessHash ): self
+```
+
+
+
+
+**Parameters:**
+
+| Parameter | Type | Description |
+|-----------|------|-------------|
+| `$_accessHash` | **integer** | File access hash. |
+
+
+
+
+---
+
+### getVolumeId
+
+Get photo volume ID.
+
+```php
+FileId::getVolumeId(  ): integer
+```
+
+
+
+
+
+
+
+---
+
+### setVolumeId
+
+Set photo volume ID.
+
+```php
+FileId::setVolumeId( integer $_volumeId ): self
+```
+
+
+
+
+**Parameters:**
+
+| Parameter | Type | Description |
+|-----------|------|-------------|
+| `$_volumeId` | **integer** | Photo volume ID. |
+
+
+
+
+---
+
+### hasVolumeId
+
+Check if has volume ID.
+
+```php
+FileId::hasVolumeId(  ): boolean
+```
+
+
+
+
+
+
+
+---
+
+### getLocalId
+
+Get photo local ID.
+
+```php
+FileId::getLocalId(  ): integer
+```
+
+
+
+
+
+
+
+---
+
+### setLocalId
+
+Set photo local ID.
+
+```php
+FileId::setLocalId( integer $_localId ): self
+```
+
+
+
+
+**Parameters:**
+
+| Parameter | Type | Description |
+|-----------|------|-------------|
+| `$_localId` | **integer** | Photo local ID. |
+
+
+
+
+---
+
+### hasLocalId
+
+Check if has local ID.
+
+```php
+FileId::hasLocalId(  ): boolean
+```
+
+
+
+
+
+
+
+---
+
+### getPhotoSizeSource
+
+Get photo size source.
+
+```php
+FileId::getPhotoSizeSource(  ): \danog\Decoder\PhotoSizeSource
+```
+
+
+
+
+
+
+
+---
+
+### setPhotoSizeSource
+
+Set photo size source.
+
+```php
+FileId::setPhotoSizeSource( \danog\Decoder\PhotoSizeSource $_photoSizeSource ): self
+```
+
+
+
+
+**Parameters:**
+
+| Parameter | Type | Description |
+|-----------|------|-------------|
+| `$_photoSizeSource` | **\danog\Decoder\PhotoSizeSource** | Photo size source. |
+
+
+
+
+---
+
+### hasPhotoSizeSource
+
+Check if has photo size source.
+
+```php
+FileId::hasPhotoSizeSource(  ): boolean
+```
+
+
+
+
+
+
+
+---
+
+### getDcId
+
+Get dC ID.
+
+```php
+FileId::getDcId(  ): integer
+```
+
+
+
+
+
+
+
+---
+
+### setDcId
+
+Set dC ID.
+
+```php
+FileId::setDcId( integer $_dcId ): self
+```
+
+
+
+
+**Parameters:**
+
+| Parameter | Type | Description |
+|-----------|------|-------------|
+| `$_dcId` | **integer** | DC ID. |
+
+
+
+
+---
+
+## PhotoSizeSourceDialogPhoto
+
+Represents source of photosize.
+
+
+
+* Full name: \danog\Decoder\PhotoSizeSource\PhotoSizeSourceDialogPhoto
+* Parent class: \danog\Decoder\PhotoSizeSource
+
+
+### setType
+
+Get photosize source type.
+
+```php
+PhotoSizeSourceDialogPhoto::setType( integer $type ): self
+```
+
+
+
+
+**Parameters:**
+
+| Parameter | Type | Description |
+|-----------|------|-------------|
+| `$type` | **integer** | Type |
+
+
+
+
+---
+
+### getDialogId
+
+Get dialog ID.
+
+```php
+PhotoSizeSourceDialogPhoto::getDialogId(  ): integer
+```
+
+
+
+
+
+
+
+---
+
+### setDialogId
+
+Set dialog ID.
+
+```php
+PhotoSizeSourceDialogPhoto::setDialogId( integer $id ): self
+```
+
+
+
+
+**Parameters:**
+
+| Parameter | Type | Description |
+|-----------|------|-------------|
+| `$id` | **integer** | Dialog ID |
+
+
+
+
+---
+
+### getDialogAccessHash
+
+Get access hash of dialog.
+
+```php
+PhotoSizeSourceDialogPhoto::getDialogAccessHash(  ): integer
+```
+
+
+
+
+
+
+
+---
+
+### setDialogAccessHash
+
+Set access hash of dialog.
+
+```php
+PhotoSizeSourceDialogPhoto::setDialogAccessHash( integer $dialogAccessHash ): self
+```
+
+
+
+
+**Parameters:**
+
+| Parameter | Type | Description |
+|-----------|------|-------------|
+| `$dialogAccessHash` | **integer** | Access hash of dialog |
+
+
+
+
+---
+
+### isSmallDialogPhoto
+
+Get whether the big or small version of the photo is being used.
+
+```php
+PhotoSizeSourceDialogPhoto::isSmallDialogPhoto(  ): boolean
+```
+
+
+
+
+
+
+
+---
+
+### setDialogPhotoSmall
+
+Set whether the big or small version of the photo is being used.
+
+```php
+PhotoSizeSourceDialogPhoto::setDialogPhotoSmall( boolean $_dialogPhotoSmall ): self
+```
+
+
+
+
+**Parameters:**
+
+| Parameter | Type | Description |
+|-----------|------|-------------|
+| `$_dialogPhotoSmall` | **boolean** | Whether the big or small version of the photo is being used |
+
+
+
+
+---
+
+## PhotoSizeSourceLegacy
+
+Represents source of photosize.
+
+
+
+* Full name: \danog\Decoder\PhotoSizeSource\PhotoSizeSourceLegacy
+* Parent class: \danog\Decoder\PhotoSizeSource
+
+
+### setType
+
+Get photosize source type.
+
+```php
+PhotoSizeSourceLegacy::setType( integer $type ): self
+```
+
+
+
+
+**Parameters:**
+
+| Parameter | Type | Description |
+|-----------|------|-------------|
+| `$type` | **integer** | Type |
+
+
+
+
+---
+
+### getSecret
+
+Get secret legacy ID.
+
+```php
+PhotoSizeSourceLegacy::getSecret(  ): integer
+```
+
+
+
+
+
+
+
+---
+
+### setSecret
+
+Set secret legacy ID.
+
+```php
+PhotoSizeSourceLegacy::setSecret( integer $_secret ): self
+```
+
+
+
+
+**Parameters:**
+
+| Parameter | Type | Description |
+|-----------|------|-------------|
+| `$_secret` | **integer** | Secret legacy ID |
+
+
+
+
+---
+
+## PhotoSizeSourceStickersetThumbnail
+
+Represents source of photosize.
+
+
+
+* Full name: \danog\Decoder\PhotoSizeSource\PhotoSizeSourceStickersetThumbnail
+* Parent class: \danog\Decoder\PhotoSizeSource
+
+
+### setType
+
+Get photosize source type.
+
+```php
+PhotoSizeSourceStickersetThumbnail::setType( integer $type ): self
+```
+
+
+
+
+**Parameters:**
+
+| Parameter | Type | Description |
+|-----------|------|-------------|
+| `$type` | **integer** | Type |
+
+
+
+
+---
+
+### getStickerSetId
+
+Get stickerset ID.
+
+```php
+PhotoSizeSourceStickersetThumbnail::getStickerSetId(  ): integer
+```
+
+
+
+
+
+
+
+---
+
+### setStickerSetId
+
+Set stickerset ID.
+
+```php
+PhotoSizeSourceStickersetThumbnail::setStickerSetId( integer $_stickerSetId ): self
+```
+
+
+
+
+**Parameters:**
+
+| Parameter | Type | Description |
+|-----------|------|-------------|
+| `$_stickerSetId` | **integer** | Stickerset ID |
+
+
+
+
+---
+
+### getStickerSetAccessHash
+
+Get stickerset access hash.
+
+```php
+PhotoSizeSourceStickersetThumbnail::getStickerSetAccessHash(  ): integer
+```
+
+
+
+
+
+
+
+---
+
+### setStickerSetAccessHash
+
+Set stickerset access hash.
+
+```php
+PhotoSizeSourceStickersetThumbnail::setStickerSetAccessHash( integer $_stickerSetAccessHash ): self
+```
+
+
+
+
+**Parameters:**
+
+| Parameter | Type | Description |
+|-----------|------|-------------|
+| `$_stickerSetAccessHash` | **integer** | Stickerset access hash |
+
+
+
+
+---
+
+## PhotoSizeSourceThumbnail
+
+Represents source of photosize.
+
+
+
+* Full name: \danog\Decoder\PhotoSizeSource\PhotoSizeSourceThumbnail
+* Parent class: \danog\Decoder\PhotoSizeSource
+
+
+### setType
+
+Get photosize source type.
+
+```php
+PhotoSizeSourceThumbnail::setType( integer $type ): self
+```
+
+
+
+
+**Parameters:**
+
+| Parameter | Type | Description |
+|-----------|------|-------------|
+| `$type` | **integer** | Type |
+
+
+
+
+---
+
+
+### getThumbFileType
+
+Get file type of original file.
+
+```php
+PhotoSizeSourceThumbnail::getThumbFileType(  ): integer
+```
+
+
+
+
+
+
+
+---
+
+### getThumbFileTypeString
+
+Get file type of original file as string.
+
+```php
+PhotoSizeSourceThumbnail::getThumbFileTypeString(  ): string
+```
+
+
+
+
+
+
+
+---
+
+### setThumbFileType
+
+Set file type of original file.
+
+```php
+PhotoSizeSourceThumbnail::setThumbFileType( integer $_thumbFileType ): self
+```
+
+
+
+
+**Parameters:**
+
+| Parameter | Type | Description |
+|-----------|------|-------------|
+| `$_thumbFileType` | **integer** | File type of original file |
+
+
+
+
+---
+
+### getThumbType
+
+Get thumbnail size.
+
+```php
+PhotoSizeSourceThumbnail::getThumbType(  ): string
+```
+
+
+
+
+
+
+
+---
+
+### setThumbType
+
+Set thumbnail size.
+
+```php
+PhotoSizeSourceThumbnail::setThumbType( string $_thumbType ): self
+```
+
+
+
+
+**Parameters:**
+
+| Parameter | Type | Description |
+|-----------|------|-------------|
+| `$_thumbType` | **string** | Thumbnail size |
+
+
+
+
+---
+
+## UniqueFileId
+
+Represents decoded unique bot API file ID.
+
+
+
+* Full name: \danog\Decoder\UniqueFileId
+
+
+### __toString
+
+Get unique bot API file ID.
+
+```php
+UniqueFileId::__toString(  ): string
+```
+
+
+
+
+
+
+
+---
+
+### getUniqueBotAPI
+
+Get unique bot API file ID.
+
+```php
+UniqueFileId::getUniqueBotAPI(  ): string
+```
+
+
+
+
+
+
+
+---
+
+### fromUniqueBotAPI
+
+Decode unique bot API file ID.
+
+```php
+UniqueFileId::fromUniqueBotAPI( string $fileId ): self
+```
+
+
+
+* This method is **static**.
+**Parameters:**
+
+| Parameter | Type | Description |
+|-----------|------|-------------|
+| `$fileId` | **string** | Bot API file ID |
+
+
+
+
+---
+
+### fromBotAPI
+
+Convert full bot API file ID to unique file ID.
+
+```php
+UniqueFileId::fromBotAPI( string $fileId ): self
+```
+
+
+
+* This method is **static**.
+**Parameters:**
+
+| Parameter | Type | Description |
+|-----------|------|-------------|
+| `$fileId` | **string** | Full bot API file ID |
+
+
+
+
+---
+
+### fromFileId
+
+Turn full file ID into unique file ID.
+
+```php
+UniqueFileId::fromFileId( \danog\Decoder\FileId $fileId ): self
+```
+
+
+
+* This method is **static**.
+**Parameters:**
+
+| Parameter | Type | Description |
+|-----------|------|-------------|
+| `$fileId` | **\danog\Decoder\FileId** | Full file ID |
+
+
+
+
+---
+
+### getTypeName
+
+Get unique file type as string.
+
+```php
+UniqueFileId::getTypeName(  ): string
+```
+
+
+
+
+
+
+
+---
+
+### getType
+
+Get unique file type.
+
+```php
+UniqueFileId::getType(  ): integer
+```
+
+
+
+
+
+
+
+---
+
+### setType
+
+Set file type.
+
+```php
+UniqueFileId::setType( integer $_type ): self
+```
+
+
+
+
+**Parameters:**
+
+| Parameter | Type | Description |
+|-----------|------|-------------|
+| `$_type` | **integer** | File type. |
+
+
+
+
+---
+
+### getId
+
+Get file ID.
+
+```php
+UniqueFileId::getId(  ): integer
+```
+
+
+
+
+
+
+
+---
+
+### setId
+
+Set file ID.
+
+```php
+UniqueFileId::setId( integer $_id ): self
+```
+
+
+
+
+**Parameters:**
+
+| Parameter | Type | Description |
+|-----------|------|-------------|
+| `$_id` | **integer** | File ID. |
+
+
+
+
+---
+
+### hasId
+
+Check if has ID.
+
+```php
+UniqueFileId::hasId(  ): boolean
+```
+
+
+
+
+
+
+
+---
+
+### getVolumeId
+
+Get photo volume ID.
+
+```php
+UniqueFileId::getVolumeId(  ): integer
+```
+
+
+
+
+
+
+
+---
+
+### setVolumeId
+
+Set photo volume ID.
+
+```php
+UniqueFileId::setVolumeId( integer $_volumeId ): self
+```
+
+
+
+
+**Parameters:**
+
+| Parameter | Type | Description |
+|-----------|------|-------------|
+| `$_volumeId` | **integer** | Photo volume ID. |
+
+
+
+
+---
+
+### hasVolumeId
+
+Check if has volume ID.
+
+```php
+UniqueFileId::hasVolumeId(  ): boolean
+```
+
+
+
+
+
+
+
+---
+
+### getLocalId
+
+Get photo local ID.
+
+```php
+UniqueFileId::getLocalId(  ): integer
+```
+
+
+
+
+
+
+
+---
+
+### setLocalId
+
+Set photo local ID.
+
+```php
+UniqueFileId::setLocalId( integer $_localId ): self
+```
+
+
+
+
+**Parameters:**
+
+| Parameter | Type | Description |
+|-----------|------|-------------|
+| `$_localId` | **integer** | Photo local ID. |
+
+
+
+
+---
+
+### hasLocalId
+
+Check if has local ID.
+
+```php
+UniqueFileId::hasLocalId(  ): boolean
+```
+
+
+
+
+
+
+
+---
+
+### getUrl
+
+Get weblocation URL.
+
+```php
+UniqueFileId::getUrl(  ): string
+```
+
+
+
+
+
+
+
+---
+
+### setUrl
+
+Set weblocation URL.
+
+```php
+UniqueFileId::setUrl( string $_url ): self
+```
+
+
+
+
+**Parameters:**
+
+| Parameter | Type | Description |
+|-----------|------|-------------|
+| `$_url` | **string** | Weblocation URL |
+
+
+
+
+---
+
+### hasUrl
+
+Check if has weblocation URL.
+
+```php
+UniqueFileId::hasUrl(  ): boolean
+```
+
+
+
+
+
+
+
+---
+
+
+
+--------
+> This document was automatically generated from source code comments on 2020-02-03 using [phpDocumentor](http://www.phpdoc.org/) and [cvuorinen/phpdoc-markdown-public](https://github.com/cvuorinen/phpdoc-markdown-public)
diff --git a/composer.json b/composer.json
index a7d59b9..05ea3d9 100644
--- a/composer.json
+++ b/composer.json
@@ -14,7 +14,7 @@
         "php": ">=7.0"
     },
     "require-dev": {
-        "phpunit/phpunit": "^8",
+        "phpunit/phpunit": "^8|^6",
         "amphp/php-cs-fixer-config": "dev-master"
     },
     "autoload": {
diff --git a/src/FileId.php b/src/FileId.php
index 11d5dea..62450be 100644
--- a/src/FileId.php
+++ b/src/FileId.php
@@ -240,6 +240,15 @@ class FileId
     {
         return UniqueFileId::fromFileId($this);
     }
+    /**
+     * Get unique bot API file ID from file ID.
+     *
+     * @return string
+     */
+    public function getUniqueBotAPI(): string
+    {
+        return UniqueFileId::fromFileId($this)->getUniqueBotAPI();
+    }
     /**
      * Get bot API file ID.
      *
@@ -247,7 +256,7 @@ class FileId
      */
     public function __toString(): string
     {
-        return $this->toBotAPI();
+        return $this->getBotAPI();
     }
     /**
      * Get bot API file ID version.
diff --git a/src/type.php b/src/type.php
index 395680c..75e1957 100644
--- a/src/type.php
+++ b/src/type.php
@@ -37,21 +37,60 @@ const PHOTO = 2;
  */
 const VOICE = 3;
 /**
- * VIdeo messages.
+ * Video.
  */
 const VIDEO = 4;
+/**
+ * Document
+ */
 const DOCUMENT = 5;
+/**
+ * Secret chat document
+ */
 const ENCRYPTED = 6;
+/**
+ * Temporary document
+ */
 const TEMP = 7;
+/**
+ * Sticker
+ */
 const STICKER = 8;
+/**
+ * Music
+ */
 const AUDIO = 9;
+/**
+ * GIF
+ */
 const ANIMATION = 10;
+/**
+ * Encrypted thumbnail
+ */
 const ENCRYPTED_THUMBNAIL = 11;
+/**
+ * Wallpaper
+ */
 const WALLPAPER = 12;
+/**
+ * Round video
+ */
 const VIDEO_NOTE = 13;
+/**
+ * Passport raw file
+ */
 const SECURE_RAW = 14;
+/**
+ * Passport file
+ */
 const SECURE = 15;
+/**
+ * Background
+ */
 const BACKGROUND = 16;
+/**
+ * Size
+ */
 const SIZE = 17;
 const NONE = 18;
 
diff --git a/tests/IntegrationTest.php b/tests/IntegrationTest.php
index d173499..0af01db 100644
--- a/tests/IntegrationTest.php
+++ b/tests/IntegrationTest.php
@@ -10,9 +10,6 @@ use PHPUnit\Framework\TestCase;
 use const danog\Decoder\FULL_UNIQUE_MAP;
 use const danog\Decoder\TYPES_IDS;
 
-
-\define('MULTIPART_BOUNDARY', '--------------------------'.\microtime(true));
-
 class IntegrationTest extends TestCase
 {
     /**
@@ -23,6 +20,7 @@ class IntegrationTest extends TestCase
      */
     public function testAll(string $type, string $fileIdStr, string $uniqueFileIdStr)
     {
+        var_dump($fileIdStr, $uniqueFileIdStr);
         $fileId = FileId::fromBotAPI($fileIdStr);
         $this->assertSame($type, $fileId->getTypeName());
 
@@ -35,11 +33,23 @@ class IntegrationTest extends TestCase
         $this->assertSame($uniqueFileIdStr, $fileId->getUnique()->getUniqueBotAPI());
     }
 
-    public function provideFileIdsAndType(): array
+    public function provideFileIdsAndType(): \Generator
     {
-        $result = [];
         $dest = \getenv('DEST');
         $token = \getenv('TOKEN');
+        foreach ($this->provideChats() as $chat) {
+            $result = \json_decode(\file_get_contents("https://api.telegram.org/bot$token/getChat?chat_id=$chat"), true)['result']['photo'];
+            yield [
+                'profile_photo',
+                $result['small_file_id'],
+                $result['small_file_unique_id'],
+            ];
+            yield [
+                'profile_photo',
+                $result['big_file_id'],
+                $result['big_file_unique_id'],
+            ];
+        }
         foreach ($this->provideUrls() as $type => $url) {
             if ($type === 'video_note') {
                 \copy($url, \basename($url));
@@ -62,13 +72,13 @@ class IntegrationTest extends TestCase
                 $botResult = [$botResult];
             }
             foreach ($botResult as $subResult) {
-                $result []= [
+                yield [
                     $type,
                     $subResult['file_id'],
                     $subResult['file_unique_id']
                 ];
                 if (isset($subResult['thumb'])) {
-                    $result []= [
+                    yield [
                         'thumbnail',
                         $subResult['thumb']['file_id'],
                         $subResult['thumb']['file_unique_id']
@@ -78,6 +88,10 @@ class IntegrationTest extends TestCase
         }
         return $result;
     }
+    public function provideChats(): array
+    {
+        return [\getenv('DEST'), '@MadelineProto'];
+    }
     public function provideUrls(): array
     {
         return [