LangGraph x402 Integration

from langgraph.graph import StateGraph, END
from typing import TypedDict
from x402_client import X402Client

class PaymentState(TypedDict):
    amount: str
    recipient: str
    approved: bool
    transaction_id: str

def validate_payment(state: PaymentState):
    # Validation logic
    return {"validated": True}

def approve_payment(state: PaymentState):
    # Approval logic
    return {"approved": True}

def execute_payment(state: PaymentState):
    client = X402Client()
    result = client.send_payment(state["amount"], state["recipient"])
    return {"transaction_id": result.id}

workflow = StateGraph(PaymentState)
workflow.add_node("validate", validate_payment)
workflow.add_node("approve", approve_payment)
workflow.add_node("execute", execute_payment)

workflow.add_edge("validate", "approve")
workflow.add_edge("approve", "execute")
workflow.add_edge("execute", END)