937f54dec2
- 新增 wxpay provider（wechatpay-node-v3 SDK），支持 Native 扫码和 H5 跳转 - 新增 /api/wxpay/notify 回调路由，AES-256-GCM 解密 + RSA 签名验证 - 修复 confirmPayment count=0 静默成功、充值失败返回 true 等 P0 问题 - 修复 notifyUrl 硬编码 easypay、回调金额覆盖订单金额等 P1 问题 - 手续费计算改用 Prisma.Decimal 精确运算，消除浮点误差 - 支付宝 provider 移除冗余 paramsForVerify，fetch 添加超时 - 补充 .env.example 配置文档和 CLAUDE.md 支付渠道说明
45 lines
1.7 KiB
TypeScript
45 lines
1.7 KiB
TypeScript
import { initPaymentProviders, paymentRegistry } from '@/lib/payment';
|
||
import { Prisma } from '@prisma/client';
|
||
|
||
/**
|
||
* 获取指定支付渠道的手续费率（百分比）。
|
||
* 优先级：FEE_RATE_{TYPE} > FEE_RATE_PROVIDER_{KEY} > 0
|
||
*/
|
||
export function getMethodFeeRate(paymentType: string): number {
|
||
// 渠道级别：FEE_RATE_ALIPAY / FEE_RATE_WXPAY / FEE_RATE_STRIPE
|
||
const methodRaw = process.env[`FEE_RATE_${paymentType.toUpperCase()}`];
|
||
if (methodRaw !== undefined && methodRaw !== '') {
|
||
const num = Number(methodRaw);
|
||
if (Number.isFinite(num) && num >= 0) return num;
|
||
}
|
||
|
||
// 提供商级别：FEE_RATE_PROVIDER_EASYPAY / FEE_RATE_PROVIDER_STRIPE
|
||
initPaymentProviders();
|
||
const providerKey = paymentRegistry.getProviderKey(paymentType);
|
||
if (providerKey) {
|
||
const providerRaw = process.env[`FEE_RATE_PROVIDER_${providerKey.toUpperCase()}`];
|
||
if (providerRaw !== undefined && providerRaw !== '') {
|
||
const num = Number(providerRaw);
|
||
if (Number.isFinite(num) && num >= 0) return num;
|
||
}
|
||
}
|
||
|
||
return 0;
|
||
}
|
||
|
||
/** decimal.js ROUND_UP = 0（远离零方向取整） */
|
||
const ROUND_UP = 0;
|
||
|
||
/**
|
||
* 根据到账金额和手续费率计算实付金额（使用 Decimal 精确计算，避免浮点误差）。
|
||
* feeAmount = ceil(rechargeAmount * feeRate / 100, 保留2位小数)
|
||
* payAmount = rechargeAmount + feeAmount
|
||
*/
|
||
export function calculatePayAmount(rechargeAmount: number, feeRate: number): number {
|
||
if (feeRate <= 0) return rechargeAmount;
|
||
const amount = new Prisma.Decimal(rechargeAmount);
|
||
const rate = new Prisma.Decimal(feeRate.toString());
|
||
const feeAmount = amount.mul(rate).div(100).toDecimalPlaces(2, ROUND_UP);
|
||
return amount.plus(feeAmount).toNumber();
|
||
}
|