3 files changed, 127 insertions, 0 deletions

diff --git a/g4f/Provider/gigachat/GigaChat.py b/g4f/Provider/gigachat/GigaChat.py
new file mode 100644
index 00000000..b1b293e3
--- /dev/null
+++ b/g4f/Provider/gigachat/GigaChat.py
@@ -0,0 +1,92 @@
+from __future__ import annotations
+
+import os
+import ssl
+import time
+import uuid
+
+import json
+from aiohttp import ClientSession, TCPConnector, BaseConnector
+from g4f.requests import raise_for_status
+
+from ...typing import AsyncResult, Messages
+from ..base_provider import AsyncGeneratorProvider, ProviderModelMixin
+from ...errors import MissingAuthError
+from ..helper import get_connector
+
+access_token = ""
+token_expires_at = 0
+
+class GigaChat(AsyncGeneratorProvider, ProviderModelMixin):
+    url = "https://developers.sber.ru/gigachat"
+    working = True
+    supports_message_history = True
+    supports_system_message = True
+    supports_stream = True
+    needs_auth = True
+    default_model = "GigaChat:latest"
+    models = ["GigaChat:latest", "GigaChat-Plus", "GigaChat-Pro"]
+
+    @classmethod
+    async def create_async_generator(
+            cls,
+            model: str,
+            messages: Messages,
+            stream: bool = True,
+            proxy: str = None,
+            api_key: str = None,
+            connector: BaseConnector = None,
+            scope: str = "GIGACHAT_API_PERS",
+            update_interval: float = 0,
+            **kwargs
+    ) -> AsyncResult:
+        global access_token, token_expires_at
+        model = cls.get_model(model)
+        if not api_key:
+            raise MissingAuthError('Missing "api_key"')
+        
+        cafile = os.path.join(os.path.dirname(__file__), "russian_trusted_root_ca_pem.crt")
+        ssl_context = ssl.create_default_context(cafile=cafile) if os.path.exists(cafile) else None
+        if connector is None and ssl_context is not None:
+            connector = TCPConnector(ssl_context=ssl_context)
+        async with ClientSession(connector=get_connector(connector, proxy)) as session:
+            if token_expires_at - int(time.time() * 1000) < 60000:
+                async with session.post(url="https://ngw.devices.sberbank.ru:9443/api/v2/oauth",
+                                        headers={"Authorization": f"Bearer {api_key}",
+                                                 "RqUID": str(uuid.uuid4()),
+                                                 "Content-Type": "application/x-www-form-urlencoded"},
+                                        data={"scope": scope}) as response:
+                    await raise_for_status(response)
+                    data = await response.json()
+                access_token = data['access_token']
+                token_expires_at = data['expires_at']
+
+            async with session.post(url="https://gigachat.devices.sberbank.ru/api/v1/chat/completions",
+                                    headers={"Authorization": f"Bearer {access_token}"},
+                                    json={
+                                        "model": model,
+                                        "messages": messages,
+                                        "stream": stream,
+                                        "update_interval": update_interval,
+                                        **kwargs
+                                    }) as response:
+                await raise_for_status(response)
+
+                async for line in response.content:
+                    if not stream:
+                        yield json.loads(line.decode("utf-8"))['choices'][0]['message']['content']
+                        return
+
+                    if line and line.startswith(b"data:"):
+                        line = line[6:-1]  # remove "data: " prefix and "\n" suffix
+                        if line.strip() == b"[DONE]":
+                            return
+                        else:
+                            msg = json.loads(line.decode("utf-8"))['choices'][0]
+                            content = msg['delta']['content']
+
+                            if content:
+                                yield content
+
+                            if 'finish_reason' in msg:
+                                return
diff --git a/g4f/Provider/gigachat/__init__.py b/g4f/Provider/gigachat/__init__.py
new file mode 100644
index 00000000..c9853742
--- /dev/null
+++ b/g4f/Provider/gigachat/__init__.py
@@ -0,0 +1,2 @@
+from .GigaChat                import GigaChat
+
diff --git a/g4f/Provider/gigachat/russian_trusted_root_ca_pem.crt b/g4f/Provider/gigachat/russian_trusted_root_ca_pem.crt
new file mode 100644
index 00000000..4c143a21
--- /dev/null
+++ b/g4f/Provider/gigachat/russian_trusted_root_ca_pem.crt
@@ -0,0 +1,33 @@
+-----BEGIN CERTIFICATE-----
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+391d/9RAfaZ12zkwFsl+IKwE/OZxW8AHa9i1p4GO0YSNuczzEm4=
+-----END CERTIFICATE-----
\ No newline at end of file