39 lines
1.4 KiB
TypeScript
39 lines
1.4 KiB
TypeScript
import { initPaymentProviders, paymentRegistry } from '@/lib/payment';
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/**
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* 获取指定支付渠道的手续费率（百分比）。
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* 优先级：FEE_RATE_{TYPE} > FEE_RATE_PROVIDER_{KEY} > 0
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*/
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export function getMethodFeeRate(paymentType: string): number {
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// 渠道级别：FEE_RATE_ALIPAY / FEE_RATE_WXPAY / FEE_RATE_STRIPE
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const methodRaw = process.env[`FEE_RATE_${paymentType.toUpperCase()}`];
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if (methodRaw !== undefined && methodRaw !== '') {
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const num = Number(methodRaw);
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if (Number.isFinite(num) && num >= 0) return num;
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}
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// 提供商级别：FEE_RATE_PROVIDER_EASYPAY / FEE_RATE_PROVIDER_STRIPE
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initPaymentProviders();
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const providerKey = paymentRegistry.getProviderKey(paymentType);
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if (providerKey) {
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const providerRaw = process.env[`FEE_RATE_PROVIDER_${providerKey.toUpperCase()}`];
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if (providerRaw !== undefined && providerRaw !== '') {
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const num = Number(providerRaw);
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if (Number.isFinite(num) && num >= 0) return num;
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}
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}
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return 0;
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}
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/**
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* 根据到账金额和手续费率计算实付金额。
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* feeAmount = ceil(rechargeAmount * feeRate / 100 * 100) / 100 （进一制到分）
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* payAmount = rechargeAmount + feeAmount
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*/
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export function calculatePayAmount(rechargeAmount: number, feeRate: number): number {
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if (feeRate <= 0) return rechargeAmount;
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const feeAmount = Math.ceil(((rechargeAmount * feeRate) / 100) * 100) / 100;
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return Math.round((rechargeAmount + feeAmount) * 100) / 100;
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}
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