c762564d40
- Fix 71 invalid-syntax files (class-body newline-broken assignments) - Add from/None chain to 307 B904 raise-without-from sites - Add B008 ignore to ruff.toml (already in pyproject.toml) - Noqa F401 on __init__.py re-exports (137 sites) - Noqa E402 on deferred imports (63 sites) - Bulk-add stdlib/FastAPI/project imports for F821 (127 sites) - Replace ×→x, –→-, …→... in docstrings (4093 chars) - Manual refactor of 5 SIM103/SIM116 patterns Tests: 791 passed (66 deselected due to pre-existing Redis issues in test_rag.py) Co-authored-by: opencode <opencode@rugmunch.io>
115 lines
4 KiB
Python
115 lines
4 KiB
Python
"""x402 Framework Adapter - base class for all AI framework integrations.
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Same pattern for every framework:
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1. Wrap a tool call
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2. Check if user has credits/trials
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3. If not, create invoice and request payment
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4. Execute tool
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5. Deduct credits
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Developer writes normal code. x402 handles the payment transparently.
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"""
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from __future__ import annotations
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import json
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import logging
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import os
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from abc import ABC, abstractmethod
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from collections.abc import Callable
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from typing import Any
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import httpx
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logger = logging.getLogger("x402.framework")
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X402_BASE_URL = os.getenv("X402_BASE_URL", "https://mcp.rugmunch.io/mcp/x402")
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class x402Adapter(ABC):
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"""Base adapter for AI framework x402 integration.
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Args:
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api_key: x402 API key for authenticated access
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base_url: x402 MCP endpoint URL
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auto_pay: If True, automatically pay invoices (requires funded account)
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max_budget_usd: Monthly budget cap (0 = unlimited)
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"""
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def __init__(
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self,
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api_key: str = "",
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base_url: str = X402_BASE_URL,
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auto_pay: bool = False,
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max_budget_usd: float = 0,
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):
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self.api_key = api_key
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self.base_url = base_url.rstrip("/")
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self.auto_pay = auto_pay
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self.max_budget_usd = max_budget_usd
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self._spent_this_month: float = 0.0
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self._client = httpx.Client(
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headers={"X-API-Key": api_key} if api_key else {},
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timeout=30,
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)
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self._cache: dict[str, Any] = {}
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def _mcp_call(self, tool: str, arguments: dict) -> dict:
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"""Call an x402 MCP tool."""
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r = self._client.post(
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self.base_url,
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json={
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"method": "tools/call",
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"params": {"name": tool, "arguments": arguments},
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},
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)
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data = r.json().get("result", {})
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text = data.get("content", [{}])[0].get("text", "{}")
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return json.loads(text) if isinstance(text, str) else text
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def check_available(self, tool: str) -> tuple[bool, float, str]:
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"""Check if a tool can be called - returns (available, price_usd, message).
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First checks trials, then checks prepaid credits/budget.
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"""
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# Check trial availability
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pricing = self._mcp_call("x402_check_balance", {"agent_id": f"framework:{id(self)}"})
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if pricing.get("balances"):
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for tid, bal in pricing["balances"].items():
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if tid == tool and bal.get("remaining", 0) > 0:
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return True, 0.0, "trial"
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# Check budget
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if self.max_budget_usd > 0 and self._spent_this_month >= self.max_budget_usd:
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return False, 0.0, f"Monthly budget ${self.max_budget_usd} exhausted"
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# Look up price
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tools = self._mcp_call("x402_list_tools", {"category": ""})
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for t in tools.get("tools", []):
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if t.get("id") == tool:
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price = t.get("price_usd", 0.01)
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return True, price, "paid"
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return False, 0.0, f"Unknown tool: {tool}"
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def get_invoice(self, tool: str) -> dict:
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"""Get a payment invoice for a tool. Returns invoice with amount and pay_to address."""
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return self._mcp_call("x402_create_invoice", {"tool": tool, "agent_id": f"framework:{id(self)}"})
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def record_usage(self, tool: str, cost_usd: float):
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"""Record tool usage for budget tracking."""
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self._spent_this_month += cost_usd
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logger.info(f"x402: called {tool} - ${cost_usd:.4f} (monthly: ${self._spent_this_month:.2f})")
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def list_tools(self, category: str = "") -> list[dict]:
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"""List available tools with prices."""
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return self._mcp_call("x402_list_tools", {"category": category}).get("tools", [])
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@abstractmethod
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def wrap_tool(self, tool_name: str, tool_func: Callable) -> Callable:
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"""Wrap a tool function with x402 payment processing.
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The returned function checks payment, calls the tool, deducts cost.
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Framework-specific implementations handle the tool registration.
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"""
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...
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