v3计划内容上传

packages/domain/src/index.ts

@@ -29,9 +29,13 @@ export function validateMinPurchase(
 export function validateRedeemAmount(
   balance: number,
   amount: number,
+  documentAmount?: number | null,
 ): { ok: boolean; message?: string } {
   if (amount <= 0) return { ok: false, message: '核销金额必须大于 0' };
   if (amount > balance) return { ok: false, message: '核销金额不能超过可用余额' };
+  if (documentAmount != null && amount > documentAmount) {
+    return { ok: false, message: '核销金额不能超过该核销单可用金额' };
+  }
   return { ok: true };
 }
 
@@ -45,12 +49,13 @@ export interface BenefitCouponBalance {
 export function allocateBenefitCoupons(
   coupons: BenefitCouponBalance[],
   amount: number,
+  documentAmount?: number | null,
 ): { ok: true; allocations: Array<{ couponId: string; amount: number }> } | { ok: false; message: string } {
   const active = coupons
     .filter((c) => c.balance > 0)
     .sort((a, b) => a.createdAt - b.createdAt);
   const totalBalance = active.reduce((sum, c) => sum + c.balance, 0);
-  const check = validateRedeemAmount(totalBalance, amount);
+  const check = validateRedeemAmount(totalBalance, amount, documentAmount);
   if (!check.ok) return { ok: false, message: check.message! };
 
   let remaining = amount;