作为在跨境支付领域摸爬滚打多年的技术人,我见过太多团队在拉丁美洲市场踩坑。2024年我们服务了一家上海跨境电商公司(以下简称"A公司"),他们想切入巴西市场却卡在支付和 AI API 成本两个环节。这篇文章就用他们的真实案例,从业务痛点讲起,一直覆盖到 Pix 即时支付的完整集成方案和 HolySheep API 的迁移细节。

一、业务背景:为什么是巴西?

A公司是一家专注拉美市场的跨境电商,主营 3C 数码配件。2024年第三季度,他们发现巴西市场有个独特优势:Pix 即时支付系统覆盖了超过 1.5 亿活跃用户,7×24 小时实时到账,支付成功率比信用卡高出 40%。但是他们的 AI 客服系统用的是某国际云服务商的 API,月账单 4200 美元,延迟 420ms,用户体验很差。

核心痛点有两个:

他们在对比了多家供应商后选择了 HolySheep AI,原因很直接:人民币直付、国内延迟低于 50ms、DeepSeek V3.2 的 output 价格只有 $0.42/MToken,比 GPT-4.1 便宜 95%。

二、Pix 即时支付系统概述

Pix 是巴西央行(BCB)于 2020 年推出的即时支付基础设施。与传统银行转账相比,Pix 的核心优势包括:到账时间从 1-2 个工作日缩短到 10 秒以内,支持 QR Code、NFC、复制密钥等多种方式,商户端手续费为零(个人用户有限额)。

对于 AI 驱动的电商系统,Pix 的 Webhook 通知机制非常关键——支付完成后,巴西央行会向商户配置的回调地址推送交易状态,这是触发 AI 客服生成个性化发货通知的最佳时机。

三、整体架构设计

我们的目标是把 Pix 支付、AI API 调用、和订单系统串联成一条流畅的数据流:

巴西用户发起咨询
       ↓
   [Pix 支付创建] → 生成 QR Code 供用户扫码
       ↓
   [HolySheep AI] → 客服机器人响应,提供支付指引
       ↓
   [Pix Webhook] → 支付成功后推送到我们的回调接口
       ↓
   [AI 订单确认] → 再次调用 AI 生成个性化确认消息
       ↓
   订单状态更新 → 通知仓库发货

关键节点都有重试机制,Pix 的 Webhook 会最多推送 5 次,间隔从 30 秒逐步增加到 30 分钟。

四、环境准备与依赖

// Python 依赖安装
pip install requests==2.31.0
pip install fastapi==0.109.0
pip install uvicorn==0.27.0
pip install pydantic==2.5.0

// 用于 Pix 支付相关的加密和编码
pip install cryptography==42.0.0
pip install qrcode==7.4.2
pip install pillow==10.2.0

需要提前准备:Pix 商户账号(需要巴西本地企业资质或通过支付服务商接入)、HolySheep API Key(立即注册获取)、以及一个可公网访问的 Webhook 回调地址。

五、代码实现

5.1 Pix 支付创建与 QR Code 生成

import requests
import qrcode
import json
from typing import Optional
from datetime import datetime, timedelta

class PixPaymentService:
    """Pix 即时支付服务封装"""
    
    def __init__(self, pix_client_id: str, pix_client_secret: str, 
                 holysheep_api_key: str):
        self.pix_base_url = "https://api.pix.bcb.gov.br/v2"
        self.holysheep_url = "https://api.holysheep.ai/v1/chat/completions"
        self.pix_credentials = {
            "client_id": pix_client_id,
            "client_secret": pix_client_secret
        }
        self.holysheep_key = holysheep_api_key
    
    def create_payment(self, amount: float, merchant_name: str,
                       transaction_id: str, description: str) -> dict:
        """
        创建 Pix 支付订单,返回包含 txid 和 QR Code 数据
        amount: 金额(巴西雷亚尔 BRL)
        """
        payload = {
            "calendario": {
                "expiracao": int((datetime.now() + timedelta(hours=1))
                                 .timestamp())
            },
            "valor": {
                "original": f"{amount:.2f}"
            },
            " chave": "[email protected]",  # 你的 Pix 密钥
            "solicitacaoPagador": f"Pedido #{transaction_id}",
            "infoAdicionais": [
                {
                    "nome": "ID do pedido",
                    "valor": transaction_id
                }
            ]
        }
        
        # 实际对接时需要 OAuth2 获取 token
        auth_response = self._get_pix_access_token()
        headers = {
            "Authorization": f"Bearer {auth_response['access_token']}",
            "Content-Type": "application/json"
        }
        
        response = requests.post(
            f"{self.pix_base_url}/cob",
            json=payload,
            headers=headers
        )
        
        if response.status_code == 201:
            data = response.json()
            txid = data.get("txid")
            # 生成 BR Code (Pix QR Code 字符串)
            br_code = self._generate_br_code(data)
            return {
                "txid": txid,
                "br_code": br_code,
                "qr_code_base64": self._generate_qr_image(br_code)
            }
        
        raise Exception(f"Pix 创建失败: {response.text}")
    
    def _generate_br_code(self, cob_data: dict) -> str:
        """
        生成 Pix BR Code 格式字符串
        这是 Pix QR Code 的核心编码格式
        """
        # 简化示例,实际需要严格按照 EMV Co 标准生成
        gui = "01"  # GUI 标识:Pix
        key = cob_data.get("chave", "")
        merchant_account = f"0014br.gov.bcb.pix{len(key):02d}{key}"
        
        # 金额
        amount = cob_data["valor"]["original"]
        amount_field = f"54{len(amount):02d}{amount}"
        
        # 商户名称(需要 UTF-8 编码转换)
        merchant_name = cob_data.get("solicitacaoPagador", "N/A")
        name_field = f"59{len(merchant_name):02d}{merchant_name}"
        
        # 城市和交易ID
        city = "SAO PAULO"
        city_field = f"60{len(city):02d}{city}"
        txid_field = f"05{len(cob_data.get('txid', '')):02d}{cob_data.get('txid', '')}"
        
        # CRC16 校验
        base_string = f"{gui}01{len(merchant_account):02d}{merchant_account}" \
                      f"{amount_field}{name_field}{city_field}6304"
        crc = self._calculate_crc16(base_string)
        
        return base_string + f"6304{crc:04X}"
    
    def _calculate_crc16(self, data: str) -> int:
        """CRC16-CCITT 校验计算"""
        crc = 0xFFFF
        for char in data:
            crc ^= ord(char) << 8
            for _ in range(8):
                if crc & 0x8000:
                    crc = (crc << 1) ^ 0x1021
                else:
                    crc <<= 1
                crc &= 0xFFFF
        return crc
    
    def _generate_qr_image(self, br_code: str) -> str:
        """将 BR Code 转换为 Base64 编码的图片"""
        import io
        import base64
        
        qr = qrcode.QRCode(version=1, box_size=10, border=4)
        qr.add_data(br_code)
        qr.make(fit=True)
        
        img = qr.make_image(fill_color="black", back_color="white")
        buffer = io.BytesIO()
        img.save(buffer, format="PNG")
        return base64.b64encode(buffer.getvalue()).decode()
    
    def _get_pix_access_token(self) -> dict:
        """获取 Pix API 访问令牌"""
        # 实际实现需要向 BCB 的 OAuth 服务器请求
        response = requests.post(
            f"{self.pix_base_url}/oauth/token",
            data={
                "grant_type": "client_credentials",
                "client_id": self.pix_credentials["client_id"],
                "client_secret": self.pix_credentials["client_secret"]
            }
        )
        return response.json()


使用示例

pix_service = PixPaymentService( pix_client_id="YOUR_PIX_CLIENT_ID", pix_client_secret="YOUR_PIX_CLIENT_SECRET", holysheep_api_key="YOUR_HOLYSHEEP_API_KEY" ) payment = pix_service.create_payment( amount=99.90, merchant_name="E-commerce Shanghai", transaction_id="ORD-2024-001234", description="Fone de Ouvido Bluetooth" ) print(f"QR Code: {payment['qr_code_base64'][:50]}...")

5.2 Webhook 回调处理与 AI 集成

from fastapi import FastAPI, Request, HTTPException
from pydantic import BaseModel
import hmac
import hashlib
import logging

app = FastAPI()
logging.basicConfig(level=logging.INFO)
logger = logging.getLogger(__name__)

class HolySheepAIClient:
    """HolySheep AI API 调用封装"""
    
    def __init__(self, api_key: str):
        self.api_key = api_key
        self.base_url = "https://api.holysheep.ai/v1"
    
    def generate_confirmation_message(self, order_id: str, 
                                       customer_name: str,
                                       product_name: str) -> str:
        """
        调用 AI 生成个性化的支付确认消息
        使用 DeepSeek V3.2($0.42/MToken),成本极低
        """
        url = f"{self.base_url}/chat/completions"
        headers = {
            "Authorization": f"Bearer {self.api_key}",
            "Content-Type": "application/json"
        }
        
        payload = {
            "model": "deepseek-v3.2",
            "messages": [
                {
                    "role": "system",
                    "content": """你是一家跨境电商的客服助手,用葡萄牙语回复客户。
                    语气友好专业,强调快速发货。"""
                },
                {
                    "role": "user",
                    "content": f"""客户 {customer_name} 已完成订单 #{order_id} 的 Pix 付款。
                    商品:{product_name}
                    请生成一条确认消息,包含:付款成功、预计发货时间(3-5工作日)、
                    物流追踪说明。保持简洁,100字以内。"""
                }
            ],
            "temperature": 0.7,
            "max_tokens": 200
        }
        
        try:
            response = requests.post(url, json=payload, headers=headers, 
                                     timeout=30)
            response.raise_for_status()
            data = response.json()
            return data["choices"][0]["message"]["content"]
        except requests.exceptions.Timeout:
            logger.error(f"AI API 超时,订单: {order_id}")
            # 返回降级消息
            return "Pagamento confirmado! Seu pedido está sendo processado."
        except requests.exceptions.RequestException as e:
            logger.error(f"AI API 错误: {e}")
            raise


class PixWebhookHandler:
    """Pix Webhook 事件处理"""
    
    def __init__(self, webhook_secret: str, ai_client: HolySheepAIClient):
        self.webhook_secret = webhook_secret
        self.ai_client = ai_client
        self.processed_ids = set()  # 防重复处理
    
    def verify_signature(self, payload: bytes, signature: str) -> bool:
        """验证 Webhook 签名,防止伪造"""
        expected = hmac.new(
            self.webhook_secret.encode(),
            payload,
            hashlib.sha256
        ).hexdigest()
        return hmac.compare_digest(f"sha256={expected}", signature)
    
    async def handle_payment_notification(self, event: dict) -> dict:
        """
        处理 Pix 支付通知
        event 格式:Pix BCB 官方 Webhook payload
        """
        event_type = event.get("evento")
        
        if event_type != "pixa.pagamento":
            return {"status": "ignored", "reason": f"非支付事件: {event_type}"}
        
        payment = event.get("pagamento", {})
        txid = payment.get("txid")
        
        # 防重复:Pix Webhook 可能推送多次
        if txid in self.processed_ids:
            logger.info(f"重复通知忽略: {txid}")
            return {"status": "duplicate"}
        
        self.processed_ids.add(txid)
        
        # 提取支付详情
        amount = float(payment.get("valor", 0))
        end_to_end_id = payment.get("endToEndId")
        timestamp = payment.get("horario")
        
        logger.info(f"支付成功: txid={txid}, 金额={amount}BRL")
        
        # 从数据库查询订单信息(简化示例)
        order = self._get_order_by_txid(txid)
        if not order:
            logger.warning(f"订单不存在: {txid}")
            return {"status": "order_not_found"}
        
        # 调用 AI 生成确认消息
        try:
            confirmation = self.ai_client.generate_confirmation_message(
                order_id=order["id"],
                customer_name=order["customer_name"],
                product_name=order["product_name"]
            )
            
            # 发送确认消息(实际应通过 WhatsApp/Email 等渠道)
            self._send_confirmation(order["customer_phone"], confirmation)
            
            # 更新订单状态
            self._update_order_status(order["id"], "paid", end_to_end_id)
            
            return {
                "status": "success",
                "confirmation_sent": True,
                "message_id": end_to_end_id
            }
        except Exception as e:
            logger.error(f"处理支付通知失败: {e}")
            # 即使 AI 失败,支付仍应标记为成功
            self._update_order_status(order["id"], "paid", end_to_end_id)
            return {"status": "partial_success", "error": str(e)}
    
    def _get_order_by_txid(self, txid: str) -> dict:
        """查询订单信息(实际应查数据库)"""
        return {
            "id": "ORD-001",
            "customer_name": "Carlos Silva",
            "customer_phone": "+5511999998888",
            "product_name": "Fone Bluetooth Premium"
        }
    
    def _send_confirmation(self, phone: str, message: str):
        """发送确认消息"""
        logger.info(f"发送至 {phone}: {message}")
    
    def _update_order_status(self, order_id: str, status: str, 
                             transaction_ref: str):
        """更新订单状态"""
        logger.info(f"订单 {order_id} 更新为 {status}, ref: {transaction_ref}")


初始化服务

ai_client = HolySheepAIClient(api_key="YOUR_HOLYSHEEP_API_KEY") webhook_handler = PixWebhookHandler( webhook_secret="YOUR_WEBHOOK_SECRET", ai_client=ai_client ) @app.post("/webhook/pix") async def pix_webhook(request: Request): """ Pix Webhook 回调端点 需要在 Pix 开发者平台配置此 URL """ body = await request.body() signature = request.headers.get("x-signature", "") # 验证签名 if not webhook_handler.verify_signature(body, signature): logger.warning("Webhook 签名验证失败") raise HTTPException(status_code=403, detail="签名无效") event = await request.json() result = await webhook_handler.handle_payment_notification(event) return result

5.3 完整的 AI 客服流程

import requests
from typing import List, Dict, Optional

class BrazilAIChatbot:
    """
    面向巴西市场的 AI 客服系统
    支持 Pix 支付引导、订单查询、物流追踪
    """
    
    def __init__(self, holysheep_api_key: str):
        self.api_key = holysheep_api_key
        self.base_url = "https://api.holysheep.ai/v1"
    
    def chat(self, user_message: str, user_id: str, 
             conversation_history: Optional[List[Dict]] = None) -> dict:
        """
        处理用户消息,生成 AI 回复
        
        成本分析(使用 DeepSeek V3.2):
        - 平均每次对话:输入约 500 tokens,输出约 150 tokens
        - 单次成本:约 $0.00042 × 0.65 = $0.00027 = 不到 0.002 元
        - 每月 10 万次对话:仅需约 $27(节省 92% 对比 GPT-4)
        """
        messages = [
            {
                "role": "system",
                "content": """你是一个专业的巴西跨境电商客服助手。
                必须使用葡萄牙语回复。
                业务范围:
                1. 商品咨询和推荐
                2. Pix 支付引导(强调即时到账、零手续费)
                3. 订单状态查询
                4. 物流和配送问题
                5. 退换货处理
                
                回答要简洁友好,总字数控制在 150 字以内。
                如果用户询问支付,可以在回复末尾添加提示:
                'Para pagar via Pix, digite: /pagamento'
                """
            }
        ]
        
        # 追加历史对话
        if conversation_history:
            messages.extend(conversation_history[-5:])  # 保留最近 5 轮
        
        messages.append({"role": "user", "content": user_message})
        
        payload = {
            "model": "deepseek-v3.2",
            "messages": messages,
            "temperature": 0.8,
            "max_tokens": 300,
            "user": user_id
        }
        
        headers = {
            "Authorization": f"Bearer {self.api_key}",
            "Content-Type": "application/json"
        }
        
        response = requests.post(
            f"{self.base_url}/chat/completions",
            json=payload,
            headers=headers,
            timeout=30
        )
        
        if response.status_code == 200:
            data = response.json()
            assistant_reply = data["choices"][0]["message"]["content"]
            
            # 记录 token 使用(用于成本监控)
            usage = data.get("usage", {})
            input_tokens = usage.get("prompt_tokens", 0)
            output_tokens = usage.get("completion_tokens", 0)
            
            return {
                "reply": assistant_reply,
                "usage": {
                    "input_tokens": input_tokens,
                    "output_tokens": output_tokens,
                    "estimated_cost_usd": (input_tokens / 1_000_000) * 0.15 + 
                                         (output_tokens / 1_000_000) * 0.42
                    # DeepSeek V3.2: input $0.15/M, output $0.42/M
                },
                "model": data.get("model")
            }
        
        raise Exception(f"AI API 错误: {response.status_code} - {response.text}")


成本对比测试

def cost_comparison(): """对比不同模型的月成本(假设每月 100 万次请求)""" scenarios = [ { "name": "GPT-4.1 (旧方案)", "input_price": 2.50, # $2.50/M "output_price": 10.00, # $10/M "avg_input": 500, "avg_output": 200 }, { "name": "Claude Sonnet 4.5", "input_price": 3.00, "output_price": 15.00, "avg_input": 500, "avg_output": 200 }, { "name": "DeepSeek V3.2 (HolySheep)", "input_price": 0.15, "output_price": 0.42, "avg_input": 500, "avg_output": 200 }, { "name": "Gemini 2.5 Flash (HolySheep)", "input_price": 0.10, "output_price": 2.50, "avg_input": 500, "avg_output": 200 } ] print("=" * 60) print("月成本对比(100万次请求)") print("=" * 60) for s in scenarios: monthly_cost = (s["avg_input"] * 1_000_000 / 1_000_000 * s["input_price"] + s["avg_output"] * 1_000_000 / 1_000_000 * s["output_price"]) print(f"{s['name']}: ${monthly_cost:,.2f}/月") print("-" * 60) print("使用 HolySheep + DeepSeek V3.2,节省超过 95% 成本")

实际使用

chatbot = BrazilAIChatbot(holysheep_api_key="YOUR_HOLYSHEEP_API_KEY") response = chatbot.chat( user_message="Olá, qual é o melhor fone de ouvido para corrida?", user_id="user_123" ) print(f"AI 回复: {response['reply']}") print(f"本次成本: ${response['usage']['estimated_cost_usd']:.6f}") cost_comparison()

六、A 公司 30 天上线数据

2024 年 10 月,A 公司完成全量切换后,我们持续跟踪了 30 天的核心指标:

指标切换前切换后提升
API 延迟(P99)420ms180ms↓ 57%
AI 月账单$4,200$680↓ 84%
Pix 支付成功率97.3%
平均客服响应时间2.8s0.9s↓ 68%
订单确认消息发送率65%99.1%↑ 52%

成本下降的核心原因:使用 DeepSeek V3.2($0.42/M output)替代 GPT-4.1($8/M output),同时 HolySheep 的 人民币直付 汇率优势(¥1=$1 对比官方 $1=¥7.3)进一步放大了节省效果。

七、常见报错排查

7.1 Pix Webhook 签名验证失败

# 错误信息
HTTP 403: {"detail": "签名无效"}

原因分析

Pix 使用 HMAC-SHA256 签名,但 HMAC 计算时使用的密钥格式有误

解决方案

import hmac import hashlib def verify_pix_signature(payload: bytes, signature_header: str, webhook_key: str) -> bool: """ 正确的 Pix Webhook 签名验证 注意:Pix 的签名是 sha256=hexdigest 格式 """ # 移除 'sha256=' 前缀 expected_hash = signature_header.replace('sha256=', '') # 使用 Webhook 密钥对 payload 计算 HMAC computed_hash = hmac.new( webhook_key.encode('utf-8'), payload, hashlib.sha256 ).hexdigest() # 使用 constant-time 比较防止时序攻击 return hmac.compare_digest(computed_hash, expected_hash)

常见错误:使用了错误的密钥

❌ 错误:用 Pix API 的 client_secret

✓ 正确:用 Pix 开发者平台配置的 Webhook 签名密钥

WEBHOOK_SIGNING_KEY = "e5f8b7c3d2a1..." # 在 Pix 平台生成

7.2 Pix QR Code 无法扫描

# 错误信息
用户扫码后提示:"Chave Pix inválida" 或 "QR Code expirado"

原因分析

BR Code 格式不符合 EMV Co 规范,或有效期设置过短

解决方案

class PixQRGenerator: """符合 EMV Co 规范的 Pix QR Code 生成器""" MERCHANT_ACCOUNT_INFO = "br.gov.bcb.pix" def generate_valid_br_code(self, pix_key: str, amount: str, merchant_name: str, city: str, txid: str, expiry_seconds: int = 3600) -> str: """ 生成有效的 BR Code 关键点: 1. GUI 格式:00 (GUI) + 01 (Pix) + length + value 2. Merchant Account 必须以 0014br.gov.bcb.pix 开头 3. CRC16 必须包含所有字段 """ # GUI: 表示这是 Pix 支付 gui = "0004" + "01" # "01" = Pix 标识 # Merchant Account Information gui_domain = "0014" + self.MERCHANT_ACCOUNT_INFO key_info = f"05{len(pix_key):02d}{pix_key}" # 05 = 密钥格式 merchan_account = gui_domain + key_info # 金额(必须包含两位小数) if float(amount) > 0: amount_field = f"54{len(amount):02d}{amount}" else: amount_field = "58" + "01" + "0" # 金额可选 # 商户名称(移除重音符号,使用 ASCII) clean_name = self._sanitize_text(merchant_name, max_length=25) name_field = f"59{len(clean_name):02d}{clean_name}" # 城市 clean_city = self._sanitize_text(city, max_length=15) city_field = f"60{len(clean_city):02d}{clean_city}" # 交易ID(唯一标识) txid_field = f"05{len(txid):02d}{txid}" # 类别(商贩/个人) category_field = "52" + "04" + "0000" # 货币(BRL = 986) currency_field = "53" + "03" + "986" # 有效期 expiry_timestamp = int(datetime.now().timestamp()) + expiry_seconds calendar_field = f"01{len(str(expiry_timestamp)):02d}{expiry_timestamp}" # 组合所有字段 payload = gui + merchan_account + amount_field + name_field + \ city_field + category_field + currency_field + \ calendar_field + "6304" # 计算 CRC16 crc = self._calculate_crc16(payload) return payload + f"{crc:04X}" def _sanitize_text(self, text: str, max_length: int) -> str: """移除特殊字符,限制长度""" # 移除重音符号 import unicodedata normalized = unicodedata.normalize('NFD', text) ascii_text = ''.join(c for c in normalized if unicodedata.category(c) != 'Mn') return ascii_text[:max_length]

7.3 AI API 响应超时

# 错误信息
requests.exceptions.ReadTimeout: HTTPSConnectionPool(...): 
Read timed out. (read timeout=30)

原因分析

1. 网络延迟过高(尤其是从巴西到国际 API 节点) 2. 模型推理时间过长 3. 请求 payload 过大

解决方案

from requests.adapters import HTTPAdapter from urllib3.util.retry import Retry import requests class HolySheepClient: """带重试和超时控制的 HolySheep API 客户端""" def __init__(self, api_key: str, base_url: str = "https://api.holysheep.ai/v1"): self.api_key = api_key self.base_url = base_url # 配置重试策略 retry_strategy = Retry( total=3, backoff_factor=1, # 重试间隔:1s, 2s, 4s status_forcelist=[429, 500, 502, 503, 504], allowed_methods=["POST"] ) adapter = HTTPAdapter(max_retries=retry_strategy) self.session = requests.Session() self.session.mount("https://", adapter) def chat_with_fallback(self, messages: list, primary_model: str = "deepseek-v3.2", fallback_model: str = "gemini-2.5-flash") -> dict: """ 主模型失败时自动切换到备用模型 适合对延迟敏感的业务场景 """ for model in [primary_model, fallback_model]: try: response = self.session.post( f"{self.base_url}/chat/completions", json={ "model": model, "messages": messages, "max_tokens": 200, "timeout": 15 # 单次请求超时 }, headers={ "Authorization": f"Bearer {self.api_key}", "Content-Type": "application/json" } ) if response.status_code == 200: return response.json() except requests.exceptions.Timeout: print(f"模型 {model} 超时,尝试备用模型...") continue except requests.exceptions.RequestException as e: print(f"模型 {model} 请求失败: {e}") continue # 所有模型都失败,返回降级响应 return { "choices": [{ "message": { "content": "Desculpe, estamos com problemas técnicos. \ Por favor, tente novamente mais tarde." } }] }

7.4 Token 计费超出预期

# 错误表现
月度账单远超预算,但查询 API 使用量后发现 tokens 数量正常

原因分析

可能存在以下问题: 1. 汇率计算使用了官方汇率而非 HolySheep 的 ¥1=$1 优惠 2. 某些模型按输入/输出分开计费 3. 缓存机制未启用,重复请求未命中

解决方案

class TokenCostTracker: """精确跟踪 API 成本""" # 2026 年主流模型价格(/MToken) MODEL_PRICES = { "gpt-4.1": {"input": 2.50, "output": 8.00}, "claude-sonnet-4.5": {"input": 3.00, "output": 15.00}, "gemini-2.5-flash": {"input": 0.10, "output": 2.50}, "deepseek-v3.2": {"input": 0.15, "output": 0.42}, } def __init__(self, currency_rate: float = 1.0): # ¥1=$1 self.currency_rate = currency_rate def calculate_cost(self, model: str, input_tokens: int, output_tokens: int) -> dict: """ 精确计算单次请求成本 """ prices = self.MODEL_PRICES.get(model, {"input": 0, "output": 0}) input_cost_usd = (input_tokens / 1_000_000) * prices["input"] output_cost_usd = (output_tokens / 1_000_000) * prices["output"] total_usd = input_cost_usd + output_cost_usd return { "model": model, "input_tokens": input_tokens, "output_tokens": output_tokens, "input_cost_usd": input_cost_usd, "output_cost_usd": output_cost_usd, "total_usd": total_usd, "total_cny": total_usd * self.currency_rate, "price_breakdown": { "input_per_1m": f"${prices['input']}", "output_per_1m": f"${prices['output']}" } } def estimate_monthly_cost(self, daily_requests: int, days: int, model: str, avg_input: int, avg_output: int) -> dict: """估算月度成本""" total_requests = daily_requests * days daily_cost = self.calculate_cost( model, avg_input, avg_output )["total_usd"] * daily_requests monthly_usd = daily_cost * days monthly_cny = monthly_usd * self.currency_rate return { "total_requests": total_requests, "monthly_cost_usd": monthly_usd, "monthly_cost_cny": monthly_cny, "savings_vs_official": monthly_usd * 6.3 # 对比官方汇率 }

使用示例

tracker = TokenCostTracker(currency_rate=1.0) # HolySheep ¥1=$1 cost = tracker.calculate_cost( model="deepseek-v3.2", input_tokens=350, output_tokens=180 ) print(f"单次请求成本: ¥{cost['total_cny']:.4f}") monthly = tracker.estimate_monthly_cost( daily_requests=5000, days=30, model="deepseek-v3.2", avg_input=400, avg_output=150 )