feat: add meshnet python sdk

.scratch/distributed-inference-network/prd.json

@@ -251,12 +251,13 @@
         "Commit only this story's code changes with a focused conventional commit message"
       ],
       "priority": 10,
-      "passes": false,
+      "passes": true,
       "notes": "Source issue: .scratch/distributed-inference-network/issues/10-meshnet-sdk.md",
       "dependsOn": [
         "US-005",
         "US-006"
-      ]
+      ],
+      "completionNotes": "Completed by fresh Ralph/Codex session ef4eea0e; verified by pytest, compileall, editable SDK install, and diff check."
     }
   ],
   "metadata": {

packages/gateway/meshnet_gateway/server.py

@@ -1,7 +1,9 @@
 """Gateway HTTP server — accepts OpenAI-format requests and routes to inference nodes."""
 
 import http.server
+import hashlib
 import json
+from collections import Counter
 import threading
 import time
 import urllib.error
@@ -21,6 +23,7 @@ class _GatewayHTTPServer(http.server.HTTPServer):
         model_presets: list[str] | None,
         contracts: Any | None,
         minimum_stake: int,
+        cost_per_layer_token_lamport: int,
     ):
         super().__init__(addr, handler)
         self.inference_route = inference_route
@@ -28,6 +31,7 @@ class _GatewayHTTPServer(http.server.HTTPServer):
         self.model_presets = model_presets
         self.contracts = contracts
         self.minimum_stake = minimum_stake
+        self.cost_per_layer_token_lamport = cost_per_layer_token_lamport
 
 
 class _GatewayHandler(http.server.BaseHTTPRequestHandler):
@@ -35,17 +39,29 @@ class _GatewayHandler(http.server.BaseHTTPRequestHandler):
         pass
 
     def do_GET(self):
-        if self.path == "/v1/health":
+        parsed = urllib.parse.urlparse(self.path)
+        if parsed.path == "/v1/health":
             self._handle_health()
-        elif self.path == "/v1/models":
+        elif parsed.path == "/v1/models":
             self._handle_models()
+        elif parsed.path == "/v1/models/available":
+            self._handle_available_models()
+        elif parsed.path == "/v1/wallet/balance":
+            self._handle_wallet_balance()
+        elif parsed.path == "/v1/estimate_cost":
+            self._handle_estimate_cost(parsed)
         else:
             self.send_response(404)
             self.end_headers()
 
     def do_POST(self):
-        if self.path == "/v1/chat/completions":
+        parsed = urllib.parse.urlparse(self.path)
+        if parsed.path == "/v1/chat/completions":
             self._handle_chat_completions()
+        elif parsed.path == "/v1/wallet/top_up":
+            self._handle_wallet_top_up()
+        elif parsed.path == "/v1/request":
+            self._handle_meshnet_request()
         else:
             self.send_response(404)
             self.end_headers()
@@ -71,6 +87,18 @@ class _GatewayHandler(http.server.BaseHTTPRequestHandler):
             }
         })
 
+    def _read_json_body(self) -> dict | None:
+        length = int(self.headers.get("Content-Length", 0))
+        try:
+            body = json.loads(self.rfile.read(length) or b"{}")
+        except (json.JSONDecodeError, ValueError):
+            self._send_json_error(400, "invalid JSON body")
+            return None
+        if not isinstance(body, dict):
+            self._send_json_error(400, "JSON body must be an object")
+            return None
+        return body
+
     def _handle_health(self) -> None:
         self._send_json(200, {"status": "ok"})
 
@@ -92,76 +120,236 @@ class _GatewayHandler(http.server.BaseHTTPRequestHandler):
         ]
         self._send_json(200, {"object": "list", "data": data})
 
+    def _handle_available_models(self) -> None:
+        server: _GatewayHTTPServer = self.server  # type: ignore[assignment]
+        if server.tracker_url is not None:
+            try:
+                models_resp = _get_json(f"{server.tracker_url}/v1/models")
+            except Exception:
+                self._send_json_error(503, "tracker unavailable")
+                return
+            data = [
+                {
+                    "id": model["id"],
+                    "shard_coverage_percentage": float(model.get("shard_coverage_percentage", 0.0)),
+                }
+                for model in models_resp.get("data", [])
+                if isinstance(model, dict) and isinstance(model.get("id"), str)
+            ]
+            self._send_json(200, {"data": data})
+            return
+        presets = server.model_presets or ["stub-model"]
+        self._send_json(200, {
+            "data": [
+                {"id": model, "shard_coverage_percentage": 100.0}
+                for model in presets
+            ]
+        })
+
+    def _handle_wallet_balance(self) -> None:
+        server: _GatewayHTTPServer = self.server  # type: ignore[assignment]
+        api_key = _api_key_from_authorization(self.headers.get("Authorization"))
+        if not api_key:
+            self._send_json_error(401, "missing API key")
+            return
+        if server.contracts is None:
+            self._send_json(200, {"sol": 0.0, "usdc": 0.0})
+            return
+        balance = server.contracts.payment.get_balance(api_key)
+        self._send_json(200, {
+            "sol": _lamports_to_sol(balance.lamports),
+            "usdc": balance.usdc_micro / 1_000_000,
+        })
+
+    def _handle_wallet_top_up(self) -> None:
+        api_key = _api_key_from_authorization(self.headers.get("Authorization"))
+        if not api_key:
+            self._send_json_error(401, "missing API key")
+            return
+        body = self._read_json_body()
+        if body is None:
+            return
+        try:
+            amount_sol = float(body.get("amount_sol", 0.0))
+            amount_usdc = float(body.get("amount_usdc", 0.0))
+        except (TypeError, ValueError):
+            self._send_json_error(400, "top-up amount must be numeric")
+            return
+        if amount_sol <= 0 and amount_usdc <= 0:
+            self._send_json_error(400, "top-up amount must be positive")
+            return
+        payment_address = _payment_address_for_api_key(api_key)
+        query = urllib.parse.urlencode({
+            "amount": amount_sol,
+            "spl-token": "USDC" if amount_usdc > 0 else "SOL",
+        })
+        self._send_json(200, {
+            "payment_address": payment_address,
+            "qr": f"solana:{payment_address}?{query}",
+            "amount_sol": amount_sol,
+            "amount_usdc": amount_usdc,
+        })
+
+    def _handle_estimate_cost(self, parsed: urllib.parse.ParseResult) -> None:
+        server: _GatewayHTTPServer = self.server  # type: ignore[assignment]
+        params = urllib.parse.parse_qs(parsed.query)
+        model = params.get("model", [""])[0]
+        try:
+            tokens = int(params.get("tokens", ["0"])[0])
+        except ValueError:
+            self._send_json_error(400, "tokens must be an integer")
+            return
+        if not model:
+            self._send_json_error(400, "model is required")
+            return
+        if tokens <= 0:
+            self._send_json_error(400, "tokens must be positive")
+            return
+        layer_count = 32
+        if server.tracker_url is None and server.model_presets is not None and model not in server.model_presets:
+            self._send_json_error(404, "model not available")
+            return
+        lamports = layer_count * tokens * server.cost_per_layer_token_lamport
+        self._send_json(200, {
+            "model": model,
+            "tokens": tokens,
+            "lamports": lamports,
+            "sol": _lamports_to_sol(lamports),
+        })
+
     def _handle_chat_completions(self):
         server: _GatewayHTTPServer = self.server  # type: ignore[assignment]
-        length = int(self.headers.get("Content-Length", 0))
+        body = self._read_json_body()
-        try:
+        if body is None:
-            body = json.loads(self.rfile.read(length))
-        except (json.JSONDecodeError, ValueError):
-            self._send_openai_error(400, "invalid JSON body", "invalid_request_error")
             return
         streaming = bool(body.get("stream", False))
 
-        if server.tracker_url is not None:
-            model = body.get("model", "stub-model")
-            tracker_path = f"{server.tracker_url}/v1/route?model={urllib.parse.quote(model)}"
         try:
-                tracker_resp = _get_json(tracker_path)
+            completion = self._build_completion(body)
-                route = tracker_resp["route"]
+        except _ModelUnavailable as exc:
-                if (
+            self._send_openai_error(503, exc.message, "model_not_available")
-                    not isinstance(route, list)
-                    or not route
-                    or not all(isinstance(node_url, str) and node_url for node_url in route)
-                ):
-                    raise ValueError("invalid tracker route")
-                route_nodes = tracker_resp.get("nodes", [])
-                if route_nodes and not _valid_route_nodes(route_nodes):
-                    raise ValueError("invalid tracker route metadata")
-                banned_wallet = _banned_route_wallet(server.contracts, route_nodes)
-                if banned_wallet is not None:
-                    self._send_openai_error(
-                        503,
-                        f"model not available: route includes banned wallet {banned_wallet}",
-                        "model_not_available",
-                    )
             return
-            except urllib.error.HTTPError as exc:
+        except _TrackerUnavailable:
-                error_body = _safe_error_body(exc)
-                self._send_openai_error(
-                    503,
-                    error_body.get("error", "model not available"),
-                    "model_not_available",
-                )
-                return
-            except (urllib.error.URLError, TimeoutError, json.JSONDecodeError, KeyError, TypeError, ValueError):
             self._send_json_error(503, "tracker unavailable")
             return
-        else:
-            route = server.inference_route  # type: ignore[assignment]
-            route_nodes = []
-
-        messages = body.get("messages", [])
-
-        try:
-            # Send messages to the first node in the inference route.
-            node_resp = _post_json(f"{route[0]}/v1/infer", {"messages": messages})
-
-            # Forward activations through remaining nodes in the route.
-            for node_url in route[1:]:
-                node_resp = _post_json(f"{node_url}/v1/infer", {"activations": node_resp["activations"]})
         except (urllib.error.URLError, TimeoutError, KeyError, json.JSONDecodeError) as exc:
             self._send_openai_error(503, f"inference pipeline error: {exc}", "pipeline_error")
             return
 
+        if streaming:
+            text = completion["choices"][0]["message"]["content"]
+            self._send_sse_response(text, completion["model"])
+        else:
+            self._send_json(200, completion)
+
+    def _handle_meshnet_request(self) -> None:
+        body = self._read_json_body()
+        if body is None:
+            return
+        try:
+            redundancy = int(body.get("redundancy", 1))
+        except (TypeError, ValueError):
+            self._send_json_error(400, "redundancy must be an integer")
+            return
+        if redundancy < 1:
+            self._send_json_error(400, "redundancy must be at least 1")
+            return
+
+        try:
+            routes = self._resolve_routes(str(body.get("model", "stub-model")), redundancy)
+            responses = [self._build_completion(body, route_payload=route_payload) for route_payload in routes]
+        except _ModelUnavailable as exc:
+            self._send_openai_error(503, exc.message, "model_not_available")
+            return
+        except _TrackerUnavailable:
+            self._send_json_error(503, "tracker unavailable")
+            return
+        except (urllib.error.URLError, TimeoutError, KeyError, json.JSONDecodeError) as exc:
+            self._send_openai_error(503, f"inference pipeline error: {exc}", "pipeline_error")
+            return
+
+        majority_response = _majority_response(responses)
+        self._send_json(200, {
+            "redundancy": redundancy,
+            "majority_response": majority_response,
+            "responses": responses,
+        })
+
+    def _build_completion(self, body: dict, route_payload: dict | None = None) -> dict:
+        server: _GatewayHTTPServer = self.server  # type: ignore[assignment]
+        if route_payload is None:
+            route_payload = self._resolve_route(str(body.get("model", "stub-model")))
+        route = route_payload["route"]
+        route_nodes = route_payload.get("nodes", [])
+        messages = body.get("messages", [])
+
+        node_resp = _post_json(f"{route[0]}/v1/infer", {"messages": messages})
+        for node_url in route[1:]:
+            node_resp = _post_json(f"{node_url}/v1/infer", {"activations": node_resp["activations"]})
+
         text = node_resp["text"]
         model = body.get("model", "stub-model")
+        self._record_inference(model, messages, text, route_nodes)
+        return _completion_response(str(model), text)
+
+    def _resolve_route(self, model: str) -> dict:
+        server: _GatewayHTTPServer = self.server  # type: ignore[assignment]
+        if server.tracker_url is not None:
+            tracker_path = f"{server.tracker_url}/v1/route?model={urllib.parse.quote(model)}"
+            try:
+                tracker_resp = _get_json(tracker_path)
+                _validate_route_payload(tracker_resp)
+                banned_wallet = _banned_route_wallet(server.contracts, tracker_resp.get("nodes", []))
+                if banned_wallet is not None:
+                    raise _ModelUnavailable(f"model not available: route includes banned wallet {banned_wallet}")
+                return tracker_resp
+            except urllib.error.HTTPError as exc:
+                error_body = _safe_error_body(exc)
+                raise _ModelUnavailable(error_body.get("error", "model not available")) from exc
+            except (urllib.error.URLError, TimeoutError, json.JSONDecodeError, KeyError, TypeError, ValueError) as exc:
+                raise _TrackerUnavailable() from exc
+        return {"route": server.inference_route, "nodes": []}
+
+    def _resolve_routes(self, model: str, redundancy: int) -> list[dict]:
+        server: _GatewayHTTPServer = self.server  # type: ignore[assignment]
+        if server.tracker_url is None:
+            return [self._resolve_route(model) for _ in range(redundancy)]
+        tracker_path = (
+            f"{server.tracker_url}/v1/routes?"
+            f"model={urllib.parse.quote(model)}&redundancy={redundancy}"
+        )
+        try:
+            tracker_resp = _get_json(tracker_path)
+            routes = tracker_resp["routes"]
+            if not isinstance(routes, list) or len(routes) != redundancy:
+                raise ValueError("invalid tracker routes")
+            for route_payload in routes:
+                _validate_route_payload(route_payload)
+                banned_wallet = _banned_route_wallet(server.contracts, route_payload.get("nodes", []))
+                if banned_wallet is not None:
+                    raise _ModelUnavailable(f"model not available: route includes banned wallet {banned_wallet}")
+            return routes
+        except urllib.error.HTTPError as exc:
+            error_body = _safe_error_body(exc)
+            raise _ModelUnavailable(error_body.get("error", "model not available")) from exc
+        except (urllib.error.URLError, TimeoutError, json.JSONDecodeError, KeyError, TypeError, ValueError) as exc:
+            raise _TrackerUnavailable() from exc
+
+    def _record_inference(
+        self,
+        model: object,
+        messages: object,
+        text: str,
+        route_nodes: object,
+    ) -> None:
+        server: _GatewayHTTPServer = self.server  # type: ignore[assignment]
         session_id = str(uuid.uuid4())
-        if server.contracts is not None and route_nodes:
+        if server.contracts is not None and isinstance(route_nodes, list):
             api_key = _api_key_from_authorization(self.headers.get("Authorization"))
             if api_key:
                 tokens = max(1, _estimate_token_count(messages, text))
                 for node in route_nodes:
-                    wallet_address = node.get("wallet_address")
+                    wallet_address = node.get("wallet_address") if isinstance(node, dict) else None
                     if not wallet_address:
                         continue
                     server.contracts.payment.record_attribution(
@@ -176,35 +364,12 @@ class _GatewayHandler(http.server.BaseHTTPRequestHandler):
         if server.contracts is not None:
             server.contracts.validation.record_completed_inference(
                 session_id=session_id,
-                model=model,
+                model=str(model),
                 messages=messages if isinstance(messages, list) else [],
                 observed_output=text,
-                route_nodes=route_nodes,
+                route_nodes=route_nodes if isinstance(route_nodes, list) else [],
             )
 
-        if streaming:
-            self._send_sse_response(text, model)
-        else:
-            self._send_json(200, {
-                "id": "chatcmpl-stub",
-                "object": "chat.completion",
-                "created": int(time.time()),
-                "model": model,
-                "choices": [{
-                    "index": 0,
-                    "message": {
-                        "role": "assistant",
-                        "content": text,
-                    },
-                    "finish_reason": "stop",
-                }],
-                "usage": {
-                    "prompt_tokens": 0,
-                    "completion_tokens": 0,
-                    "total_tokens": 0,
-                },
-            })
-
     def _send_sse_response(self, text: str, model: str) -> None:
         chunk_id = "chatcmpl-stub"
         created = int(time.time())
@@ -282,6 +447,19 @@ def _valid_route_nodes(route_nodes: object) -> bool:
     return True
 
 
+def _validate_route_payload(route_payload: dict) -> None:
+    route = route_payload["route"]
+    if (
+        not isinstance(route, list)
+        or not route
+        or not all(isinstance(node_url, str) and node_url for node_url in route)
+    ):
+        raise ValueError("invalid tracker route")
+    route_nodes = route_payload.get("nodes", [])
+    if route_nodes and not _valid_route_nodes(route_nodes):
+        raise ValueError("invalid tracker route metadata")
+
+
 def _banned_route_wallet(contracts: Any | None, route_nodes: object) -> str | None:
     if contracts is None or not isinstance(route_nodes, list):
         return None
@@ -308,6 +486,66 @@ def _estimate_token_count(messages: object, completion_text: str) -> int:
     return 1
 
 
+def _lamports_to_sol(lamports: int) -> float:
+    return lamports / 1_000_000_000
+
+
+def _payment_address_for_api_key(api_key: str) -> str:
+    alphabet = "123456789ABCDEFGHJKLMNPQRSTUVWXYZabcdefghijkmnopqrstuvwxyz"
+    value = int.from_bytes(hashlib.sha256(f"meshnet:{api_key}".encode()).digest(), "big")
+    chars = []
+    while value:
+        value, remainder = divmod(value, 58)
+        chars.append(alphabet[remainder])
+    return "".join(reversed(chars))[:44].rjust(32, "1")
+
+
+def _completion_response(model: str, text: str) -> dict:
+    return {
+        "id": "chatcmpl-stub",
+        "object": "chat.completion",
+        "created": int(time.time()),
+        "model": model,
+        "choices": [{
+            "index": 0,
+            "message": {
+                "role": "assistant",
+                "content": text,
+            },
+            "finish_reason": "stop",
+        }],
+        "usage": {
+            "prompt_tokens": 0,
+            "completion_tokens": 0,
+            "total_tokens": 0,
+        },
+    }
+
+
+def _majority_response(responses: list[dict]) -> dict:
+    if not responses:
+        raise ValueError("responses must not be empty")
+    contents = [
+        response["choices"][0]["message"]["content"]
+        for response in responses
+    ]
+    majority_content, _ = Counter(contents).most_common(1)[0]
+    for response in responses:
+        if response["choices"][0]["message"]["content"] == majority_content:
+            return response
+    return responses[0]
+
+
+class _ModelUnavailable(Exception):
+    def __init__(self, message: str) -> None:
+        super().__init__(message)
+        self.message = message
+
+
+class _TrackerUnavailable(Exception):
+    pass
+
+
 def _post_json(url: str, payload: dict, timeout: float = 5.0) -> dict:
     data = json.dumps(payload).encode()
     req = urllib.request.Request(url, data=data, headers={"Content-Type": "application/json"}, method="POST")
@@ -341,6 +579,7 @@ class GatewayServer:
         model_presets: list[str] | None = None,
         contracts: Any | None = None,
         minimum_stake: int = 0,
+        cost_per_layer_token_lamport: int = 1,
         host: str = "127.0.0.1",
         port: int = 0,
     ):
@@ -360,6 +599,7 @@ class GatewayServer:
         self._model_presets: list[str] | None = model_presets
         self._contracts = contracts
         self._minimum_stake = minimum_stake
+        self._cost_per_layer_token_lamport = cost_per_layer_token_lamport
         self._host = host
         self._requested_port = port
         self._server: _GatewayHTTPServer | None = None
@@ -378,6 +618,7 @@ class GatewayServer:
             self._model_presets,
             self._contracts,
             self._minimum_stake,
+            self._cost_per_layer_token_lamport,
         )
         self.port = self._server.server_address[1]
         self._thread = threading.Thread(target=self._server.serve_forever, daemon=True)

packages/sdk/meshnet/__init__.py

@@ -1,3 +1,19 @@
 """meshnet — Distributed Inference Network Python SDK."""
 
+from .client import (
+    Client,
+    CostEstimate,
+    RedundantRequestResult,
+    TopUpQuote,
+    WalletBalance,
+)
+
 __version__ = "0.1.0"
+
+__all__ = [
+    "Client",
+    "CostEstimate",
+    "RedundantRequestResult",
+    "TopUpQuote",
+    "WalletBalance",
+]

packages/sdk/meshnet/__init__.pyi

@@ -0,0 +1,10 @@
+from .client import (
+    Client as Client,
+    CostEstimate as CostEstimate,
+    RedundantRequestResult as RedundantRequestResult,
+    TopUpQuote as TopUpQuote,
+    WalletBalance as WalletBalance,
+)
+
+__version__: str
+__all__: list[str]

packages/sdk/meshnet/client.py

@@ -0,0 +1,167 @@
+"""Typed Python SDK for the meshnet OpenAI-compatible gateway."""
+
+from __future__ import annotations
+
+from dataclasses import dataclass
+import json
+import urllib.parse
+import urllib.request
+from typing import Any
+
+import openai
+from openai.types.chat import ChatCompletion
+
+
+@dataclass(frozen=True)
+class WalletBalance:
+    """API-key balance in client-facing currencies."""
+
+    sol: float
+    usdc: float
+
+
+@dataclass(frozen=True)
+class TopUpQuote:
+    """Payment details for funding an API key account."""
+
+    payment_address: str
+    qr: str
+    amount_sol: float
+    amount_usdc: float
+
+
+@dataclass(frozen=True)
+class CostEstimate:
+    """Preflight cost estimate for a request."""
+
+    model: str
+    tokens: int
+    lamports: int
+    sol: float
+
+
+@dataclass(frozen=True)
+class RedundantRequestResult:
+    """Result of sending a prompt through multiple independent routes."""
+
+    redundancy: int
+    majority_response: ChatCompletion
+    responses: list[ChatCompletion]
+
+
+class Client:
+    """meshnet SDK client.
+
+    ``chat`` is the official OpenAI SDK chat resource, configured against the
+    meshnet gateway. Network-specific controls live on ``wallet``, ``models``,
+    ``estimate_cost``, and ``request``.
+    """
+
+    def __init__(self, *, api_key: str, base_url: str = "https://api.meshnet.ai") -> None:
+        self.api_key = api_key
+        self.base_url = base_url.rstrip("/")
+        self._openai = openai.OpenAI(
+            api_key=api_key,
+            base_url=_openai_base_url(self.base_url),
+        )
+        self.chat = self._openai.chat
+        self.wallet = _WalletClient(self)
+        self.models = _ModelsClient(self)
+
+    def estimate_cost(self, *, model: str, tokens: int) -> CostEstimate:
+        query = urllib.parse.urlencode({"model": model, "tokens": tokens})
+        data = self._get_json(f"/v1/estimate_cost?{query}")
+        return CostEstimate(
+            model=str(data["model"]),
+            tokens=int(data["tokens"]),
+            lamports=int(data["lamports"]),
+            sol=float(data["sol"]),
+        )
+
+    def request(
+        self,
+        *,
+        model: str,
+        messages: list[dict[str, Any]],
+        redundancy: int = 1,
+        **params: Any,
+    ) -> RedundantRequestResult:
+        payload: dict[str, Any] = {
+            "model": model,
+            "messages": messages,
+            "redundancy": redundancy,
+            **params,
+        }
+        data = self._post_json("/v1/request", payload)
+        return RedundantRequestResult(
+            redundancy=int(data["redundancy"]),
+            majority_response=_chat_completion(data["majority_response"]),
+            responses=[_chat_completion(item) for item in data["responses"]],
+        )
+
+    def _get_json(self, path: str) -> dict[str, Any]:
+        req = urllib.request.Request(
+            f"{self.base_url}{path}",
+            headers=self._headers(),
+            method="GET",
+        )
+        with urllib.request.urlopen(req, timeout=10) as resp:
+            return json.loads(resp.read())
+
+    def _post_json(self, path: str, payload: dict[str, Any]) -> dict[str, Any]:
+        data = json.dumps(payload).encode()
+        req = urllib.request.Request(
+            f"{self.base_url}{path}",
+            data=data,
+            headers={**self._headers(), "Content-Type": "application/json"},
+            method="POST",
+        )
+        with urllib.request.urlopen(req, timeout=30) as resp:
+            return json.loads(resp.read())
+
+    def _headers(self) -> dict[str, str]:
+        return {"Authorization": f"Bearer {self.api_key}"}
+
+
+class _WalletClient:
+    def __init__(self, client: Client) -> None:
+        self._client = client
+
+    def balance(self) -> WalletBalance:
+        data = self._client._get_json("/v1/wallet/balance")
+        return WalletBalance(sol=float(data["sol"]), usdc=float(data["usdc"]))
+
+    def top_up(self, *, amount_sol: float = 0.0, amount_usdc: float = 0.0) -> TopUpQuote:
+        data = self._client._post_json(
+            "/v1/wallet/top_up",
+            {"amount_sol": amount_sol, "amount_usdc": amount_usdc},
+        )
+        return TopUpQuote(
+            payment_address=str(data["payment_address"]),
+            qr=str(data["qr"]),
+            amount_sol=float(data["amount_sol"]),
+            amount_usdc=float(data["amount_usdc"]),
+        )
+
+
+class _ModelsClient:
+    def __init__(self, client: Client) -> None:
+        self._client = client
+
+    def available(self) -> list[dict[str, float | str]]:
+        data = self._client._get_json("/v1/models/available")
+        return [
+            {
+                "id": str(model["id"]),
+                "shard_coverage_percentage": float(model["shard_coverage_percentage"]),
+            }
+            for model in data["data"]
+        ]
+
+
+def _openai_base_url(base_url: str) -> str:
+    return base_url if base_url.endswith("/v1") else f"{base_url}/v1"
+
+
+def _chat_completion(data: dict[str, Any]) -> ChatCompletion:
+    return ChatCompletion.model_validate(data)

packages/sdk/meshnet/client.pyi

@@ -0,0 +1,64 @@
+from typing import Any
+
+from openai.resources.chat.chat import Chat
+from openai.types.chat import ChatCompletion
+
+class WalletBalance:
+    sol: float
+    usdc: float
+    def __init__(self, sol: float, usdc: float) -> None: ...
+
+class TopUpQuote:
+    payment_address: str
+    qr: str
+    amount_sol: float
+    amount_usdc: float
+    def __init__(
+        self,
+        payment_address: str,
+        qr: str,
+        amount_sol: float,
+        amount_usdc: float,
+    ) -> None: ...
+
+class CostEstimate:
+    model: str
+    tokens: int
+    lamports: int
+    sol: float
+    def __init__(self, model: str, tokens: int, lamports: int, sol: float) -> None: ...
+
+class RedundantRequestResult:
+    redundancy: int
+    majority_response: ChatCompletion
+    responses: list[ChatCompletion]
+    def __init__(
+        self,
+        redundancy: int,
+        majority_response: ChatCompletion,
+        responses: list[ChatCompletion],
+    ) -> None: ...
+
+class _WalletClient:
+    def balance(self) -> WalletBalance: ...
+    def top_up(self, *, amount_sol: float = 0.0, amount_usdc: float = 0.0) -> TopUpQuote: ...
+
+class _ModelsClient:
+    def available(self) -> list[dict[str, float | str]]: ...
+
+class Client:
+    api_key: str
+    base_url: str
+    chat: Chat
+    wallet: _WalletClient
+    models: _ModelsClient
+    def __init__(self, *, api_key: str, base_url: str = "https://api.meshnet.ai") -> None: ...
+    def estimate_cost(self, *, model: str, tokens: int) -> CostEstimate: ...
+    def request(
+        self,
+        *,
+        model: str,
+        messages: list[dict[str, Any]],
+        redundancy: int = 1,
+        **params: Any,
+    ) -> RedundantRequestResult: ...

packages/sdk/meshnet/py.typed

@@ -0,0 +1 @@
+

packages/sdk/pyproject.toml

@@ -7,7 +7,11 @@ name = "meshnet"
 version = "0.1.0"
 description = "Distributed Inference Network Python SDK"
 requires-python = ">=3.10"
+dependencies = ["openai>=1"]
 
 [tool.setuptools.packages.find]
 where = ["."]
 include = ["meshnet*"]
+
+[tool.setuptools.package-data]
+meshnet = ["py.typed", "*.pyi"]

packages/tracker/meshnet_tracker/server.py

@@ -16,6 +16,9 @@ HTTP API contract:
 - GET /v1/route?model=<preset>
   Response 200: {"route": ["http://node-a", "http://node-b"]}
   Response 400/404/503: {"error": str}
+- GET /v1/routes?model=<preset>&redundancy=<n>
+  Response 200: {"routes": [{"route": [...], "nodes": [...]}]}
+  Response 400/404/503: {"error": str}
 """
 
 import http.server
@@ -89,6 +92,36 @@ def _select_route(
     return route, ""
 
 
+def _coverage_percentage(
+    nodes: list[_NodeEntry],
+    required_start: int,
+    required_end: int,
+) -> float:
+    required_layers = required_end - required_start + 1
+    if required_layers <= 0:
+        return 0.0
+
+    intervals = sorted(
+        (
+            (max(required_start, node.shard_start), min(required_end, node.shard_end))
+            for node in nodes
+            if node.shard_end >= required_start and node.shard_start <= required_end
+        ),
+        key=lambda interval: interval[0],
+    )
+    covered = 0
+    covered_until = required_start - 1
+    for start, end in intervals:
+        if end <= covered_until:
+            continue
+        next_start = max(start, covered_until + 1)
+        if next_start > end:
+            continue
+        covered += end - next_start + 1
+        covered_until = end
+    return round((covered / required_layers) * 100, 2)
+
+
 def _registration_ban_error(contracts: Any | None, wallet_address: str | None) -> str | None:
     if contracts is None or not wallet_address:
         return None
@@ -168,6 +201,8 @@ class _TrackerHandler(http.server.BaseHTTPRequestHandler):
         parsed = urllib.parse.urlparse(self.path)
         if parsed.path == "/v1/route":
             self._handle_route(parsed)
+        elif parsed.path == "/v1/routes":
+            self._handle_routes(parsed)
         elif parsed.path == "/v1/nodes/assign":
             self._handle_assign(parsed)
         elif parsed.path == "/v1/models":
@@ -179,10 +214,29 @@ class _TrackerHandler(http.server.BaseHTTPRequestHandler):
     def _handle_models(self):
         server: _TrackerHTTPServer = self.server  # type: ignore[assignment]
         created = int(time.time())
-        data = [
+        with server.lock:
-            {"id": name, "object": "model", "created": created, "owned_by": "meshnet"}
+            self._purge_expired_nodes()
-            for name in server.model_presets
+            alive = list(server.registry.values())
+        if server.contracts is not None:
+            alive = [
+                node for node in alive
+                if not node.wallet_address or not server.contracts.registry.get_wallet(node.wallet_address).banned
             ]
+        data = []
+        for name, preset in server.model_presets.items():
+            model_nodes = [node for node in alive if node.model == name]
+            coverage = _coverage_percentage(
+                model_nodes,
+                preset["layers_start"],
+                preset["layers_end"],
+            )
+            data.append({
+                "id": name,
+                "object": "model",
+                "created": created,
+                "owned_by": "meshnet",
+                "shard_coverage_percentage": coverage,
+            })
         self._send_json(200, {"object": "list", "data": data})
 
     def _handle_register(self):
@@ -400,6 +454,68 @@ class _TrackerHandler(http.server.BaseHTTPRequestHandler):
             ],
         })
 
+    def _handle_routes(self, parsed: urllib.parse.ParseResult):
+        server: _TrackerHTTPServer = self.server  # type: ignore[assignment]
+        params = urllib.parse.parse_qs(parsed.query)
+        model_list = params.get("model")
+        if not model_list:
+            self._send_json(400, {"error": "missing 'model' query parameter"})
+            return
+
+        try:
+            redundancy = int(params.get("redundancy", ["1"])[0])
+        except ValueError:
+            self._send_json(400, {"error": "redundancy must be an integer"})
+            return
+        if redundancy < 1:
+            self._send_json(400, {"error": "redundancy must be at least 1"})
+            return
+
+        model = model_list[0]
+        preset = server.model_presets.get(model)
+        if preset is None:
+            self._send_json(404, {"error": f"unknown model preset: {model!r}"})
+            return
+
+        required_start: int = preset["layers_start"]
+        required_end: int = preset["layers_end"]
+
+        with server.lock:
+            self._purge_expired_nodes()
+            candidates = [node for node in server.registry.values() if node.model == model]
+        if server.contracts is not None:
+            candidates = [
+                node for node in candidates
+                if not node.wallet_address or not server.contracts.registry.get_wallet(node.wallet_address).banned
+            ]
+
+        routes = []
+        remaining = list(candidates)
+        for _ in range(redundancy):
+            route, error = _select_route(remaining, required_start, required_end)
+            if error:
+                self._send_json(503, {"error": error})
+                return
+            route_endpoints = {node.endpoint for node in route}
+            remaining = [node for node in remaining if node.endpoint not in route_endpoints]
+            routes.append({
+                "route": [e.endpoint for e in route],
+                "nodes": [
+                    {
+                        "endpoint": e.endpoint,
+                        "wallet_address": e.wallet_address,
+                        "shard_start": e.shard_start,
+                        "shard_end": e.shard_end,
+                        "model": e.model,
+                        "shard_checksum": e.shard_checksum,
+                        "score": e.score,
+                    }
+                    for e in route
+                ],
+            })
+
+        self._send_json(200, {"routes": routes})
+
 
 class TrackerServer:
     """HTTP tracker that manages node registration and resolves inference routes.

tests/test_meshnet_sdk.py

@@ -0,0 +1,143 @@
+"""US-010 integration tests: typed meshnet SDK over local gateway/tracker/nodes."""
+
+import json
+import urllib.request
+
+from meshnet import Client
+from meshnet_contracts import LocalSolanaContracts
+from meshnet_gateway.server import GatewayServer, _payment_address_for_api_key
+from meshnet_node.server import StubNodeServer
+from meshnet_tracker.server import TrackerServer, _NodeEntry, _coverage_percentage
+
+
+def test_sdk_support_helpers_are_deterministic_without_network():
+    """Non-socket coverage for SDK-facing gateway/tracker helper behavior."""
+    address = _payment_address_for_api_key("sdk-key")
+    nodes = [
+        _NodeEntry("a", "http://node-a", 0, 15, "stub-model", None, {}, None, 1.0),
+        _NodeEntry("b", "http://node-b", 16, 31, "stub-model", None, {}, None, 1.0),
+    ]
+
+    assert 32 <= len(address) <= 44
+    assert _coverage_percentage(nodes, 0, 31) == 100.0
+
+
+def _post_json(url: str, payload: dict) -> dict:
+    data = json.dumps(payload).encode()
+    req = urllib.request.Request(
+        url,
+        data=data,
+        headers={"Content-Type": "application/json"},
+        method="POST",
+    )
+    with urllib.request.urlopen(req) as r:
+        return json.loads(r.read())
+
+
+def _register_node(
+    tracker_url: str,
+    endpoint: str,
+    shard_start: int,
+    shard_end: int,
+    *,
+    wallet_address: str,
+) -> None:
+    _post_json(
+        f"{tracker_url}/v1/nodes/register",
+        {
+            "endpoint": endpoint,
+            "shard_start": shard_start,
+            "shard_end": shard_end,
+            "hardware_profile": {},
+            "wallet_address": wallet_address,
+            "score": 1.0,
+        },
+    )
+
+
+def test_meshnet_sdk_methods_against_local_network():
+    """SDK covers OpenAI chat passthrough plus meshnet wallet/model/cost/request APIs."""
+    contracts = LocalSolanaContracts(starting_credit_lamports=0)
+    contracts.payment.fund_api_key("sdk-key", lamports=2_000_000_000, usdc_micro=123_000_000)
+
+    tracker = TrackerServer(contracts=contracts)
+    tracker_port = tracker.start()
+    tracker_url = f"http://127.0.0.1:{tracker_port}"
+
+    nodes = [
+        StubNodeServer(shard_start=0, shard_end=15, is_last_shard=False),
+        StubNodeServer(shard_start=16, shard_end=31, is_last_shard=True),
+        StubNodeServer(shard_start=0, shard_end=15, is_last_shard=False),
+        StubNodeServer(shard_start=16, shard_end=31, is_last_shard=True),
+    ]
+    node_ports = [node.start() for node in nodes]
+
+    for index, (port, shard_start, shard_end) in enumerate(
+        [
+            (node_ports[0], 0, 15),
+            (node_ports[1], 16, 31),
+            (node_ports[2], 0, 15),
+            (node_ports[3], 16, 31),
+        ],
+        start=1,
+    ):
+        _register_node(
+            tracker_url,
+            f"http://127.0.0.1:{port}",
+            shard_start,
+            shard_end,
+            wallet_address=f"wallet-{index}",
+        )
+
+    gateway = GatewayServer(tracker_url=tracker_url, contracts=contracts)
+    gateway_port = gateway.start()
+    gateway_url = f"http://127.0.0.1:{gateway_port}"
+
+    try:
+        client = Client(api_key="sdk-key", base_url=gateway_url)
+
+        chat_response = client.chat.completions.create(
+            model="stub-model",
+            messages=[{"role": "user", "content": "hello sdk"}],
+        )
+        assert chat_response.choices[0].message.content == "stub response to: hello sdk"
+
+        balance = client.wallet.balance()
+        assert balance.sol == 2.0
+        assert balance.usdc == 123.0
+
+        top_up = client.wallet.top_up(amount_sol=1.0)
+        assert top_up.amount_sol == 1.0
+        assert 32 <= len(top_up.payment_address) <= 44
+        assert top_up.qr.startswith("solana:")
+
+        available_models = client.models.available()
+        assert available_models == [
+            {
+                "id": "stub-model",
+                "shard_coverage_percentage": 100.0,
+            }
+        ]
+
+        estimate = client.estimate_cost(model="stub-model", tokens=1_000)
+        assert estimate.model == "stub-model"
+        assert estimate.tokens == 1_000
+        assert estimate.sol == 0.000032
+
+        redundant = client.request(
+            model="stub-model",
+            messages=[{"role": "user", "content": "redundant"}],
+            redundancy=2,
+        )
+        assert redundant.redundancy == 2
+        assert redundant.majority_response.choices[0].message.content == (
+            "stub response to: redundant"
+        )
+        assert len(redundant.responses) == 2
+        assert nodes[1].received_activations
+        assert nodes[3].received_activations
+    finally:
+        gateway.stop()
+        for node in nodes:
+            node.stop()
+        tracker.stop()