feat: 添加剩余金额查看功能

tonesc-red-packet/app/admin/[id]/draw-list.client.tsx

@@ -1,8 +1,10 @@
 "use client"
 
-import { useState } from "react"
+import { useCallback, useState } from "react"
 import { getRedPacketDrawsByRedPacketId } from "@/app/server/actions/get-red-packet-draws"
 import { formatAmount } from "@/lib/format-amount"
+import { CreateRedPacketPayload } from "@/lib/types/red-packet"
+import { formatAmountFromInt, parseAmountToInt } from "@/lib/utils"
 
 type Draw = {
     id: string
@@ -12,10 +14,14 @@ type Draw = {
 }
 
 export function DrawList({
+    count,
+    rule,
     precision,
     redPacketId,
     initialDraws,
 }: {
+    count: number
+    rule: CreateRedPacketPayload['rule']
     precision: number
     redPacketId: string
     initialDraws: Draw[]
@@ -37,6 +43,39 @@ export function DrawList({
         }
     }
 
+    const getBalance = useCallback(() => {
+        const used = draws.reduce((p, draw) => {
+            const pInt = parseAmountToInt(p, precision)
+            const dInt = parseAmountToInt(draw.amount, precision)
+            return formatAmountFromInt(dInt + pInt, precision)
+        }, '0.0');
+
+        if (rule.type === 'fixed') {
+            const amount = formatAmountFromInt(
+                parseAmountToInt(rule.singleAmount, precision) * BigInt(count),
+                precision
+            )
+
+            return formatAmountFromInt(
+                parseAmountToInt(amount, precision) - parseAmountToInt(used, precision),
+                precision,
+            )
+        } else if (rule.type === 'luck') {
+            const amount = formatAmountFromInt(
+                parseAmountToInt(rule.totalAmount, precision),
+                precision
+            )
+
+            return formatAmountFromInt(
+                parseAmountToInt(amount, precision) - parseAmountToInt(used, precision),
+                precision,
+            )
+        } else if (rule.type === 'random') {
+            return ''
+        }
+        return ''
+    }, [rule, draws])
+
     return (
         <section className="rounded-lg border p-3 space-y-2">
             {/* 标题 + 刷新按钮 */}
@@ -54,31 +93,39 @@ export function DrawList({
             {draws.length === 0 ? (
                 <div className="text-sm text-gray-400">暂无领取记录</div>
             ) : (
-                <ul className="space-y-1">
-                    {draws.map((draw) => (
-                        <li
-                            key={draw.id}
-                            className="flex justify-between items-center text-sm font-mono"
-                        >
-                            {/* 用户 */}
-                            <span>
-                                {draw.userId.slice(0, 6)}…
-                            </span>
-
-                            <div className="flex flex-1 flex-col">
-                                {/* 金额 */}
-                                <span className="text-right">
-                                    {formatAmount(draw.amount, precision)}
+                <>
+                    <ul className="space-y-1">
+                        {draws.map((draw) => (
+                            <li
+                                key={draw.id}
+                                className="flex justify-between items-center text-sm font-mono"
+                            >
+                                {/* 用户 */}
+                                <span>
+                                    {draw.userId.slice(0, 6)}…
                                 </span>
 
-                                {/* 时间 */}
-                                <span className="text-right text-gray-400">
-                                    {draw.createdAt.toLocaleString()}
-                                </span>
-                            </div>
-                        </li>
-                    ))}
-                </ul>
+                                <div className="flex flex-1 flex-col">
+                                    {/* 金额 */}
+                                    <span className="text-right">
+                                        {formatAmount(draw.amount, precision)}
+                                    </span>
+
+                                    {/* 时间 */}
+                                    <span className="text-right text-gray-400">
+                                        {draw.createdAt.toLocaleString()}
+                                    </span>
+                                </div>
+                            </li>
+                        ))}
+                    </ul>
+                    {getBalance() && <div className="border-t py-1">
+                        <div className="text-sm">
+                            <span>剩余：</span>
+                            <span>{getBalance()}</span>
+                        </div>
+                    </div>}
+                </>
             )}
         </section>
     )

tonesc-red-packet/app/admin/[id]/page.tsx

@@ -3,8 +3,6 @@ import { notFound } from "next/navigation"
 import { PublicIdSection } from "./public-id-section";
 import { DrawList } from "./draw-list.client";
 import { getRedPacketDrawsByRedPacketId } from "@/app/server/actions/get-red-packet-draws";
-import { getDecimalPlacesFromStep } from "@/lib/currency";
-import { formatAmount } from "@/lib/format-amount";
 
 export const metadata = {
     title: "红包管理 - tonesc 红包",
@@ -37,7 +35,7 @@ export default async function AdminRedPacketPage({ params }: Props) {
 
     const initialDraws = await getRedPacketDrawsByRedPacketId(redPacketId);
 
-    const precision = getDecimalPlacesFromStep(redPacket.currencyPrecision);
+    const precision = redPacket.currencyPrecision;
 
     return (
         <main className="mx-auto max-w-md p-4 space-y-4">
@@ -57,26 +55,26 @@ export default async function AdminRedPacketPage({ params }: Props) {
                 <div>
                     <span className="text-gray-500">金额单位：</span>
                     <span>
-                        {redPacket.currencyName}（精度 {formatAmount(redPacket.currencyPrecision, precision)}）
+                        {redPacket.currencyName}（精度 {precision}）
                     </span>
                 </div>
 
-                {redPacket.maxDrawTimes !== null && (
-                    <div>
-                        <span className="text-gray-500">单用户最大抽取次数：</span>
-                        <span>{redPacket.maxDrawTimes}</span>
-                    </div>
-                )}
+                <div>
+                    <span className="text-gray-500">单用户最大抽取次数：</span>
+                    <span>{redPacket.maxDrawTimes ?? 1}</span>
+                </div>
             </section>
 
             <section className="rounded-lg border p-3">
                 <div className="text-gray-500 mb-1">红包规则</div>
-                <pre className="text-sm bg-gray-50 rounded p-2 overflow-x-auto">
+                <pre className="text-sm bg-gray-50 dark:bg-gray-900 rounded p-2 overflow-x-auto">
                     {JSON.stringify(redPacket.rule, null, 2)}
                 </pre>
             </section>
 
             <DrawList
+                count={redPacket.count}
+                rule={redPacket.rule}
                 precision={precision}
                 redPacketId={redPacketId}
                 initialDraws={initialDraws}

tonesc-red-packet/app/api/og/[id]/route.tsx

@@ -1,80 +0,0 @@
-import { db } from "@/app/server/db"
-import { redPackets } from "@/app/server/schema/red-packet"
-import { ImageResponse } from "@vercel/og"
-import { eq } from "drizzle-orm"
-import { NextRequest } from "next/server"
-
-export const runtime = "edge" // 使用 Edge Runtime 加快生成速度
-
-export async function GET(req: NextRequest) {
-    try {
-        const { searchParams } = new URL(req.url)
-        const id = searchParams.get("id")
-        if (!id) return new Response("Missing red packet ID", { status: 400 })
-
-        // 查询红包信息
-        const packet = (await db
-            .select()
-            .from(redPackets)
-            .where(eq(redPackets.id, id))
-            .limit(1))[0]
-
-        if (!packet) return new Response("Red packet not found", { status: 404 })
-
-        // 生成规则文字
-        let ruleText = ""
-        const rule = packet.rule as any
-        if (rule.type === "fixed") {
-            ruleText = `固定金额 ${rule.singleAmount} ${packet.currencyName}`
-        } else if (rule.type === "random") {
-            ruleText = `随机金额 ${rule.min} ~ ${rule.max} ${packet.currencyName}`
-        } else if (rule.type === "luck") {
-            ruleText = `拼手气，总额 ${rule.total} ${packet.currencyName}`
-        }
-
-        return new ImageResponse(
-            (
-                <div
-                    style={{
-                        width: "1200px",
-                        height: "630px",
-                        background: "linear-gradient(180deg, #FF4D4F 0%, #FF7875 100%)",
-                        display: "flex",
-                        flexDirection: "column",
-                        alignItems: "center",
-                        justifyContent: "center",
-                        fontFamily: "sans-serif",
-                    }}
-                >
-                    <div
-                        style={{
-                            fontSize: 80,
-                            color: "white",
-                            fontWeight: "bold",
-                            marginBottom: 20,
-                        }}
-                    >
-                        🎁 tonesc 红包
-                    </div>
-                    <div
-                        style={{
-                            fontSize: 40,
-                            color: "#FFD666",
-                            marginBottom: 40,
-                        }}
-                    >
-                        {ruleText}
-                    </div>
-                    {/* 卡通红包图标 */}
-                    <div style={{ fontSize: 120 }}>🧧</div>
-                </div>
-            ),
-            {
-                width: 1200,
-                height: 630,
-            }
-        )
-    } catch (e) {
-        return new Response("Failed to generate image", { status: 500 })
-    }
-}

tonesc-red-packet/app/create/create-page.tsx

@@ -0,0 +1,393 @@
+"use client"
+
+import { useState } from "react"
+import { Input } from "@/components/ui/input"
+import { Button } from "@/components/ui/button"
+import {
+    Select,
+    SelectContent,
+    SelectItem,
+    SelectTrigger,
+    SelectValue,
+} from "@/components/ui/select"
+import { CreateRedPacketPayload } from "@/lib/types/red-packet"
+import { createRedPacket } from "../server/actions/create-red-packet"
+import { toast } from "sonner"
+import { useRouter } from "next/navigation"
+
+type RuleType = "fixed" | "random" | "luck"
+
+type CurrencyUnit = {
+    name: string
+    precision: number
+}
+
+type CurrencyUnitPreset = {
+    key: string
+    name: string
+    precision: number
+    custom?: boolean
+}
+
+const CURRENCY_PRESETS: CurrencyUnitPreset[] = [
+    { key: "rmb", name: "人民币", precision: 2 },
+    { key: "custom", name: "自定义", precision: 0, custom: true },
+]
+
+/* ---------- utils ---------- */
+function formatByPrecision(value: string, precision: number) {
+    if (!value) return ""
+    const num = Number(value)
+    if (Number.isNaN(num)) return ""
+    return num.toFixed(precision)
+}
+
+function isValidPrecision(p: string) {
+    const n = Number(p)
+    if (isNaN(n)) return false
+    if (n < 0 || n > 8) return false
+    return true
+}
+
+function buildCreatePayload(params: {
+    count: number
+    currency: { name: string; precision: number }
+    ruleType: RuleType
+    singleAmount: string
+    minAmount: string
+    maxAmount: string
+    totalAmount: string
+    maxDrawTimes?: string
+}): CreateRedPacketPayload {
+    const {
+        count,
+        currency,
+        ruleType,
+        singleAmount,
+        minAmount,
+        maxAmount,
+        totalAmount,
+        maxDrawTimes,
+    } = params
+
+    const rule =
+        ruleType === "fixed"
+            ? {
+                type: "fixed",
+                singleAmount,
+            } as const
+            : ruleType === "random"
+                ? {
+                    type: "random",
+                    min: minAmount,
+                    max: maxAmount,
+                } as const
+                : {
+                    type: "luck",
+                    totalAmount,
+                } as const;
+
+    return {
+        count,
+        currency,
+        rule,
+        maxDrawTimes: maxDrawTimes
+            ? Number(maxDrawTimes)
+            : null,
+    }
+}
+
+/* ---------- page ---------- */
+
+export function CreateRedPacketPage() {
+    const router = useRouter();
+    /* 红包数量（允许为空） */
+    const [count, setCount] = useState("1")
+
+    const parsedCount = Math.max(1, Number(count) || 1)
+
+    /* 金额单位 */
+    const [unitKey, setUnitKey] = useState("rmb")
+    const preset = CURRENCY_PRESETS.find((u) => u.key === unitKey)!
+
+    const [customUnitName, setCustomUnitName] = useState("")
+    const [customPrecision, setCustomPrecision] = useState("0")
+
+    const currency: CurrencyUnit = preset.custom
+        ? {
+            name: customUnitName,
+            precision: Number(customPrecision) || preset.precision,
+        }
+        : {
+            name: preset.name,
+            precision: preset.precision,
+        }
+
+    const precision = currency.precision
+
+    /* 规则 */
+    const [ruleType, setRuleType] = useState<RuleType>("fixed")
+
+    /* 金额 */
+    const [singleAmount, setSingleAmount] = useState("")
+    const [minAmount, setMinAmount] = useState("")
+    const [maxAmount, setMaxAmount] = useState("")
+    const [totalAmount, setTotalAmount] = useState("")
+
+    /* 抽取次数 */
+    const [maxDrawTimes, setMaxDrawTimes] = useState("")
+
+    /* ---------- total estimate ---------- */
+
+    function renderTotalEstimate() {
+        if (ruleType === "fixed" && singleAmount) {
+            return `总金额：${formatByPrecision(
+                (Number(singleAmount) * parsedCount).toString(),
+                precision
+            )} ${currency.name}`
+        }
+
+        if (ruleType === "luck" && totalAmount) {
+            return `总金额：${formatByPrecision(
+                totalAmount,
+                precision
+            )} ${currency.name}`
+        }
+
+        if (ruleType === "random" && minAmount && maxAmount) {
+            return `总金额范围：${formatByPrecision(
+                (Number(minAmount) * parsedCount).toString(),
+                precision
+            )} ～ ${formatByPrecision(
+                (Number(maxAmount) * parsedCount).toString(),
+                precision
+            )} ${currency.name}`
+        }
+
+        return null
+    }
+
+    return (
+        <div className="min-h-screen bg-gray-100 dark:bg-zinc-900 px-4 py-6">
+            <div className="mx-auto max-w-md space-y-5">
+                <h1 className="text-center text-2xl font-semibold">创建红包</h1>
+
+                <Card>
+                    <Field label="红包数量">
+                        <Input
+                            type="number"
+                            value={count}
+                            onChange={(e) => setCount(e.target.value)}
+                            onBlur={() => {
+                                if (!count || Number(count) < 1) setCount("1")
+                            }}
+                        />
+                    </Field>
+
+                    <Field label="金额单位">
+                        <Select value={unitKey} onValueChange={setUnitKey}>
+                            <SelectTrigger>
+                                <SelectValue />
+                            </SelectTrigger>
+                            <SelectContent>
+                                {CURRENCY_PRESETS.map((u) => (
+                                    <SelectItem key={u.key} value={u.key}>
+                                        {u.name}
+                                    </SelectItem>
+                                ))}
+                            </SelectContent>
+                        </Select>
+                    </Field>
+
+                    {preset.custom && (
+                        <>
+                            <Field label="单位名称">
+                                <Input
+                                    value={customUnitName}
+                                    onChange={(e) => setCustomUnitName(e.target.value)}
+                                />
+                            </Field>
+
+                            <Field label="金额精度（支持0～8）">
+                                <Input
+                                    type="number"
+                                    value={customPrecision}
+                                    onChange={(e) => {
+                                        let n = Number(e.target.value);
+                                        if (isNaN(n)) n = 0;
+                                        setCustomPrecision(`${n}`)
+                                    }}
+                                />
+                                {!isValidPrecision(customPrecision) && (
+                                    <p className="text-xs text-red-500">精度格式不合法</p>
+                                )}
+                            </Field>
+                        </>
+                    )}
+                </Card>
+
+                <Card>
+                    <RuleSelector value={ruleType} onChange={setRuleType} />
+
+                    {ruleType === "fixed" && (
+                        <MoneyInput
+                            label="单个红包金额"
+                            value={singleAmount}
+                            precision={precision}
+                            onChange={setSingleAmount}
+                        />
+                    )}
+
+                    {ruleType === "random" && (
+                        <>
+                            <MoneyInput
+                                label="最小金额"
+                                value={minAmount}
+                                precision={precision}
+                                onChange={setMinAmount}
+                            />
+                            <MoneyInput
+                                label="最大金额"
+                                value={maxAmount}
+                                precision={precision}
+                                onChange={setMaxAmount}
+                            />
+                        </>
+                    )}
+
+                    {ruleType === "luck" && (
+                        <MoneyInput
+                            label="总金额"
+                            value={totalAmount}
+                            precision={precision}
+                            onChange={setTotalAmount}
+                        />
+                    )}
+                </Card>
+
+                {parsedCount >= 2 && (
+                    <Card>
+                        <Field label="单个用户最大抽取次数（可选）">
+                            <Input
+                                inputMode="numeric"
+                                placeholder="不填默认为1"
+                                value={maxDrawTimes}
+                                onChange={(e) => setMaxDrawTimes(e.target.value)}
+                            />
+                        </Field>
+                    </Card>
+                )}
+
+                {renderTotalEstimate() && (
+                    <div className="rounded-xl bg-blue-50 px-4 py-3 text-sm text-blue-700">
+                        {renderTotalEstimate()}
+                    </div>
+                )}
+
+                <Button
+                    className="h-12 w-full text-base"
+                    onClick={async () => {
+                        const payload = buildCreatePayload({
+                            count: parsedCount,
+                            currency,
+                            ruleType,
+                            singleAmount,
+                            minAmount,
+                            maxAmount,
+                            totalAmount,
+                            maxDrawTimes,
+                        })
+
+                        const result = await createRedPacket(payload).catch((e) => {
+                            toast.error(`${e.message || '请求失败'}`)
+                            return null;
+                        });
+
+                        if (result && result.adminId) {
+                            router.push(`/admin/${result.adminId}`)
+                        }
+                    }}
+                >
+                    创建红包
+                </Button>
+            </div>
+        </div>
+    )
+}
+
+/* ---------- UI helpers ---------- */
+
+function Card({ children }: { children: React.ReactNode }) {
+    return <div className="space-y-4 rounded-2xl bg-white dark:bg-black p-4">{children}</div>
+}
+
+function Field({
+    label,
+    children,
+}: {
+    label: string
+    children: React.ReactNode
+}) {
+    return (
+        <div className="space-y-1.5">
+            <label className="text-sm font-medium">{label}</label>
+            {children}
+        </div>
+    )
+}
+
+function MoneyInput({
+    label,
+    value,
+    precision,
+    onChange,
+}: {
+    label: string
+    value: string
+    precision: number
+    onChange: (v: string) => void
+}) {
+    return (
+        <Field label={label}>
+            <Input
+                inputMode="decimal"
+                value={value}
+                onChange={(e) => onChange(e.target.value)}
+                onBlur={() => onChange(formatByPrecision(value, precision))}
+                placeholder={`精度 ${precision}`}
+            />
+        </Field>
+    )
+}
+
+function RuleSelector({
+    value,
+    onChange,
+}: {
+    value: RuleType
+    onChange: (v: RuleType) => void
+}) {
+    const rules = [
+        { type: "fixed", label: "固定" },
+        { type: "random", label: "随机" },
+        { type: "luck", label: "拼手气" },
+    ] as const
+
+    return (
+        <div className="flex rounded-xl bg-muted p-1">
+            {rules.map((r) => (
+                <button
+                    key={r.type}
+                    onClick={() => onChange(r.type)}
+                    className={`flex-1 rounded-lg py-2 text-sm font-medium transition
+            ${value === r.type
+                            ? "bg-background shadow"
+                            : "text-muted-foreground"
+                        }`}
+                >
+                    {r.label}
+                </button>
+            ))}
+        </div>
+    )
+}

tonesc-red-packet/app/create/page.tsx

@@ -1,404 +1,19 @@
-"use client"
+import { CreateRedPacketPage } from "./create-page";
 
-import { useState } from "react"
-import { Input } from "@/components/ui/input"
-import { Button } from "@/components/ui/button"
-import {
-    Select,
-    SelectContent,
-    SelectItem,
-    SelectTrigger,
-    SelectValue,
-} from "@/components/ui/select"
-import { CreateRedPacketPayload } from "@/lib/types/red-packet"
-import { createRedPacket } from "../server/actions/create-red-packet"
-import { toast } from "sonner"
-import { useRouter } from "next/navigation"
-
-// export const metadata = {
-//     title: "创建红包 - tonesc 红包",
-//     description: "创建私有红包，支持多种金额规则、高精度金额和单用户抽取次数设置，立即生成可分享链接。",
-//     keywords: "创建红包, 私有红包, 随机红包, 固定红包, 拼手气红包, tonesc",
-//     robots: "noindex, nofollow",
-//     openGraph: {
-//         title: "创建红包 - Tonesc 红包",
-//         description: "创建私有红包，支持多种金额规则、高精度金额和单用户抽取次数设置，立即生成可分享链接。",
-//         url: "https://redpacket.lab.tonesc.com/create",
-//         siteName: "Tonesc 红包",
-//         type: "website"
-//     }
-// }
-
-type RuleType = "fixed" | "random" | "luck"
-
-type CurrencyUnit = {
-    name: string
-    precision: number
-}
-
-type CurrencyUnitPreset = {
-    key: string
-    name: string
-    precision: number
-    custom?: boolean
-}
-
-const CURRENCY_PRESETS: CurrencyUnitPreset[] = [
-    { key: "rmb", name: "人民币", precision: 0.01 },
-    { key: "custom", name: "自定义", precision: 0.01, custom: true },
-]
-
-/* ---------- utils ---------- */
-
-function decimalsFromPrecision(p: number) {
-    return p.toString().split(".")[1]?.length ?? 0
-}
-
-function formatByPrecision(value: string, precision: number) {
-    if (!value) return ""
-    const num = Number(value)
-    if (Number.isNaN(num)) return ""
-    return num.toFixed(decimalsFromPrecision(precision))
-}
-
-function isValidPrecision(p: string) {
-    return /^1$|^0\.0*1$/.test(p)
-}
-
-function buildCreatePayload(params: {
-    count: number
-    currency: { name: string; precision: number }
-    ruleType: RuleType
-    singleAmount: string
-    minAmount: string
-    maxAmount: string
-    totalAmount: string
-    maxDrawTimes?: string
-}): CreateRedPacketPayload {
-    const {
-        count,
-        currency,
-        ruleType,
-        singleAmount,
-        minAmount,
-        maxAmount,
-        totalAmount,
-        maxDrawTimes,
-    } = params
-
-    const rule =
-        ruleType === "fixed"
-            ? {
-                type: "fixed",
-                singleAmount,
-            } as const
-            : ruleType === "random"
-                ? {
-                    type: "random",
-                    min: minAmount,
-                    max: maxAmount,
-                } as const
-                : {
-                    type: "luck",
-                    totalAmount,
-                } as const;
-
-    return {
-        count,
-        currency,
-        rule,
-        maxDrawTimes: maxDrawTimes
-            ? Number(maxDrawTimes)
-            : null,
+export const metadata = {
+    title: "创建红包 - tonesc 红包",
+    description: "创建私有红包，支持多种金额规则、高精度金额和单用户抽取次数设置，立即生成可分享链接。",
+    keywords: "创建红包, 私有红包, 随机红包, 固定红包, 拼手气红包, tonesc",
+    robots: "noindex, nofollow",
+    openGraph: {
+        title: "创建红包 - Tonesc 红包",
+        description: "创建私有红包，支持多种金额规则、高精度金额和单用户抽取次数设置，立即生成可分享链接。",
+        url: "https://redpacket.lab.tonesc.com/create",
+        siteName: "Tonesc 红包",
+        type: "website"
     }
 }
 
-/* ---------- page ---------- */
-
-export default function CreateRedPacketPage() {
-    const router = useRouter();
-    /* 红包数量（允许为空） */
-    const [count, setCount] = useState("1")
-
-    const parsedCount = Math.max(1, Number(count) || 1)
-
-    /* 金额单位 */
-    const [unitKey, setUnitKey] = useState("rmb")
-    const preset = CURRENCY_PRESETS.find((u) => u.key === unitKey)!
-
-    const [customUnitName, setCustomUnitName] = useState("")
-    const [customPrecision, setCustomPrecision] = useState("0.01")
-
-    const currency: CurrencyUnit = preset.custom
-        ? {
-            name: customUnitName,
-            precision: Number(customPrecision) || preset.precision,
-        }
-        : {
-            name: preset.name,
-            precision: preset.precision,
-        }
-
-    const precision = currency.precision
-
-    /* 规则 */
-    const [ruleType, setRuleType] = useState<RuleType>("fixed")
-
-    /* 金额 */
-    const [singleAmount, setSingleAmount] = useState("")
-    const [minAmount, setMinAmount] = useState("")
-    const [maxAmount, setMaxAmount] = useState("")
-    const [totalAmount, setTotalAmount] = useState("")
-
-    /* 抽取次数 */
-    const [maxDrawTimes, setMaxDrawTimes] = useState("")
-
-    /* ---------- total estimate ---------- */
-
-    function renderTotalEstimate() {
-        if (ruleType === "fixed" && singleAmount) {
-            return `总金额：${formatByPrecision(
-                (Number(singleAmount) * parsedCount).toString(),
-                precision
-            )} ${currency.name}`
-        }
-
-        if (ruleType === "luck" && totalAmount) {
-            return `总金额：${formatByPrecision(
-                totalAmount,
-                precision
-            )} ${currency.name}`
-        }
-
-        if (ruleType === "random" && minAmount && maxAmount) {
-            return `总金额范围：${formatByPrecision(
-                (Number(minAmount) * parsedCount).toString(),
-                precision
-            )} ～ ${formatByPrecision(
-                (Number(maxAmount) * parsedCount).toString(),
-                precision
-            )} ${currency.name}`
-        }
-
-        return null
-    }
-
-    return (
-        <div className="min-h-screen bg-gray-100 px-4 py-6">
-            <div className="mx-auto max-w-md space-y-5">
-                <h1 className="text-center text-2xl font-semibold">创建红包</h1>
-
-                <Card>
-                    <Field label="红包数量">
-                        <Input
-                            inputMode="numeric"
-                            value={count}
-                            onChange={(e) => setCount(e.target.value)}
-                            onBlur={() => {
-                                if (!count || Number(count) < 1) setCount("1")
-                            }}
-                        />
-                    </Field>
-
-                    <Field label="金额单位">
-                        <Select value={unitKey} onValueChange={setUnitKey}>
-                            <SelectTrigger>
-                                <SelectValue />
-                            </SelectTrigger>
-                            <SelectContent>
-                                {CURRENCY_PRESETS.map((u) => (
-                                    <SelectItem key={u.key} value={u.key}>
-                                        {u.name}
-                                    </SelectItem>
-                                ))}
-                            </SelectContent>
-                        </Select>
-                    </Field>
-
-                    {preset.custom && (
-                        <>
-                            <Field label="单位名称">
-                                <Input
-                                    value={customUnitName}
-                                    onChange={(e) => setCustomUnitName(e.target.value)}
-                                />
-                            </Field>
-
-                            <Field label="金额精度（1 / 0.1 / 0.01...）">
-                                <Input
-                                    value={customPrecision}
-                                    onChange={(e) => setCustomPrecision(e.target.value)}
-                                />
-                                {!isValidPrecision(customPrecision) && (
-                                    <p className="text-xs text-red-500">精度格式不合法</p>
-                                )}
-                            </Field>
-                        </>
-                    )}
-                </Card>
-
-                <Card>
-                    <RuleSelector value={ruleType} onChange={setRuleType} />
-
-                    {ruleType === "fixed" && (
-                        <MoneyInput
-                            label="单个红包金额"
-                            value={singleAmount}
-                            precision={precision}
-                            onChange={setSingleAmount}
-                        />
-                    )}
-
-                    {ruleType === "random" && (
-                        <>
-                            <MoneyInput
-                                label="最小金额"
-                                value={minAmount}
-                                precision={precision}
-                                onChange={setMinAmount}
-                            />
-                            <MoneyInput
-                                label="最大金额"
-                                value={maxAmount}
-                                precision={precision}
-                                onChange={setMaxAmount}
-                            />
-                        </>
-                    )}
-
-                    {ruleType === "luck" && (
-                        <MoneyInput
-                            label="总金额"
-                            value={totalAmount}
-                            precision={precision}
-                            onChange={setTotalAmount}
-                        />
-                    )}
-                </Card>
-
-                {parsedCount >= 2 && (
-                    <Card>
-                        <Field label="单个用户最大抽取次数（可选）">
-                            <Input
-                                inputMode="numeric"
-                                placeholder="不填默认为1"
-                                value={maxDrawTimes}
-                                onChange={(e) => setMaxDrawTimes(e.target.value)}
-                            />
-                        </Field>
-                    </Card>
-                )}
-
-                {renderTotalEstimate() && (
-                    <div className="rounded-xl bg-blue-50 px-4 py-3 text-sm text-blue-700">
-                        {renderTotalEstimate()}
-                    </div>
-                )}
-
-                <Button
-                    className="h-12 w-full text-base"
-                    onClick={async () => {
-                        const payload = buildCreatePayload({
-                            count: parsedCount,
-                            currency,
-                            ruleType,
-                            singleAmount,
-                            minAmount,
-                            maxAmount,
-                            totalAmount,
-                            maxDrawTimes,
-                        })
-
-                        const result = await createRedPacket(payload).catch((e) => {
-                            toast.error(`${e.message || '请求失败'}`)
-                            return null;
-                        });
-
-                        if (result && result.adminId) {
-                            router.push(`/admin/${result.adminId}`)
-                        }
-                    }}
-                >
-                    创建红包
-                </Button>
-            </div>
-        </div>
-    )
-}
-
-/* ---------- UI helpers ---------- */
-
-function Card({ children }: { children: React.ReactNode }) {
-    return <div className="space-y-4 rounded-2xl bg-white p-4">{children}</div>
-}
-
-function Field({
-    label,
-    children,
-}: {
-    label: string
-    children: React.ReactNode
-}) {
-    return (
-        <div className="space-y-1.5">
-            <label className="text-sm font-medium">{label}</label>
-            {children}
-        </div>
-    )
-}
-
-function MoneyInput({
-    label,
-    value,
-    precision,
-    onChange,
-}: {
-    label: string
-    value: string
-    precision: number
-    onChange: (v: string) => void
-}) {
-    return (
-        <Field label={label}>
-            <Input
-                inputMode="decimal"
-                value={value}
-                onChange={(e) => onChange(e.target.value)}
-                onBlur={() => onChange(formatByPrecision(value, precision))}
-                placeholder={`精度 ${precision}`}
-            />
-        </Field>
-    )
-}
-
-function RuleSelector({
-    value,
-    onChange,
-}: {
-    value: RuleType
-    onChange: (v: RuleType) => void
-}) {
-    const rules = [
-        { type: "fixed", label: "固定" },
-        { type: "random", label: "随机" },
-        { type: "luck", label: "拼手气" },
-    ] as const
-
-    return (
-        <div className="flex rounded-xl bg-muted p-1">
-            {rules.map((r) => (
-                <button
-                    key={r.type}
-                    onClick={() => onChange(r.type)}
-                    className={`flex-1 rounded-lg py-2 text-sm font-medium transition
-            ${value === r.type
-                            ? "bg-background shadow"
-                            : "text-muted-foreground"
-                        }`}
-                >
-                    {r.label}
-                </button>
-            ))}
-        </div>
-    )
-}
+export default function CreatePage() {
+    return <CreateRedPacketPage />
+}

tonesc-red-packet/app/p/[id]/page.tsx

@@ -1,7 +1,6 @@
 import { notFound } from "next/navigation"
 import RedPacketClient from "./red-packet-client"
 import { getRedPacketByPublicId } from "@/app/server/actions/get-red-packet";
-import { getDecimalPlacesFromStep } from "@/lib/currency";
 
 export const metadata = {
     title: "抽红包 - tonesc 红包",
@@ -29,7 +28,7 @@ export default async function RedPacketPage({ params }: Props) {
     if (!packet) notFound()
 
     const { id, currencyName, currencyPrecision, maxDrawTimes } = packet;
-    const precision = getDecimalPlacesFromStep(currencyPrecision);
+    const precision = currencyPrecision;
 
     return <RedPacketClient packet={{
         id, currencyName, precision, maxDrawTimes

tonesc-red-packet/app/server/actions/create-red-packet.ts

@@ -29,8 +29,8 @@ export async function createRedPacket(
 
         count: payload.count,
 
-        currencyName: payload.currency.name,
-        currencyPrecision: payload.currency.precision.toString(),
+        currencyName: payload.currency.name.trim(),
+        currencyPrecision: payload.currency.precision,
 
         rule: payload.rule,
 

tonesc-red-packet/app/server/actions/draw-red-packet.ts

@@ -5,8 +5,8 @@ import { redPackets } from "@/app/server/schema/red-packet"
 import { redPacketDraws } from "@/app/server/schema/red-packet-draws"
 import { eq, sql } from "drizzle-orm"
 import { randomUUID } from "crypto"
-import { getDecimalPlacesFromStep } from "@/lib/currency"
 import { formatAmount } from "@/lib/format-amount"
+import { formatAmountFromInt, parseAmountToInt, randomBigInt } from "@/lib/utils"
 
 type DrawResult =
     | { ok: true; amount: string }
@@ -64,28 +64,67 @@ export async function drawRedPacket(
             .from(redPacketDraws)
             .where(eq(redPacketDraws.redPacketId, redPacketId))
 
-        const precision = getDecimalPlacesFromStep(packet.currencyPrecision);
+        const precision = packet.currencyPrecision;
         const rule = packet.rule
+
         let amount: string
 
         /* 5️⃣ 金额计算（关键） */
         if (rule.type === "fixed") {
             amount = formatAmount(rule.singleAmount, precision)
         } else if (rule.type === "random") {
-            const min = Number(rule.min)
-            const max = Number(rule.max)
-            amount = randomByPrecision(min, max, precision)
+            const minInt = parseAmountToInt(rule.min, precision)
+            const maxInt = parseAmountToInt(rule.max, precision)
+
+            if (minInt < 0n || maxInt < 0n) {
+                throw new Error("Invalid min/max: negative amount")
+            }
+
+            if (minInt > maxInt) {
+                throw new Error("Invalid min/max: min > max")
+            }
+
+            const amountInt = randomBigInt(minInt, maxInt)
+
+            amount = formatAmountFromInt(amountInt, precision)
         } else {
             // 拼手气
-            const total = Number(rule.totalAmount)
-            const remain = total - Number(usedAmount)
+            const totalInt = parseAmountToInt(rule.totalAmount, precision)
+            const usedInt = parseAmountToInt(usedAmount, precision)
+
+            const remainInt = totalInt - usedInt
+            if (remainInt < 0n) {
+                throw new Error("Invalid state: remaining amount < 0")
+            }
+
+            let amountInt: bigint
 
             if (remainingCount === 1) {
-                amount = remain.toFixed(precision)
+                amountInt = remainInt
             } else {
-                const max = remain / remainingCount * 2
-                amount = randomByPrecision(0.01, max, precision)
+                const count = BigInt(remainingCount)
+                const MIN_UNIT = 1n // 1 分 / 1 sat / 1 最小单位
+
+                // max = (remain / remainingCount) * 2
+                const maxInt = (remainInt / count) * 2n
+
+                if (maxInt < MIN_UNIT) {
+                    // 剩余过小，防御性兜底
+                    amountInt = MIN_UNIT
+                } else {
+                    amountInt = randomBigInt(MIN_UNIT, maxInt)
+                }
             }
+
+            if (amountInt < 0n) {
+                throw new Error("Invalid amount: negative")
+            }
+
+            if (amountInt > remainInt) {
+                throw new Error("Invalid amount: exceeds remaining")
+            }
+
+            amount = formatAmountFromInt(amountInt, precision)
         }
 
         /* 6️⃣ 写入抽取记录 */
@@ -98,18 +137,4 @@ export async function drawRedPacket(
 
         return { ok: true, amount }
     })
-}
-
-function randomByPrecision(
-    min: number,
-    max: number,
-    precision: number
-) {
-    const factor = Math.pow(10, precision)
-    const value =
-        Math.floor(
-            (Math.random() * (max - min) + min) * factor
-        ) / factor
-
-    return value.toFixed(precision)
-}
+}

tonesc-red-packet/app/server/schema/red-packet-draws.ts

@@ -15,8 +15,8 @@ export const redPacketDraws = pgTable("red_packet_draws", {
     userId: text("user_id").notNull(),
 
     amount: numeric("amount", {
-        precision: 20,
-        scale: 10,
+        precision: 38,
+        scale: 8,
     }).notNull(),
 
     createdAt: timestamp("created_at", { withTimezone: true })

tonesc-red-packet/app/server/schema/red-packet.ts

@@ -21,10 +21,7 @@ export const redPackets = pgTable("red_packets", {
     count: integer("count").notNull(),
 
     currencyName: text("currency_name").notNull(),
-    currencyPrecision: numeric("currency_precision", {
-        precision: 20,
-        scale: 10,
-    }).notNull(),
+    currencyPrecision: integer("currency_precision").notNull(),
 
     rule: jsonb("rule")
         .$type<CreateRedPacketPayload["rule"]>()

tonesc-red-packet/drizzle/0005_quiet_leech.sql

@@ -0,0 +1 @@
+ALTER TABLE "red_packet_draws" ALTER COLUMN "amount" SET DATA TYPE numeric(38, 8);

tonesc-red-packet/drizzle/0006_rare_maginty.sql

@@ -0,0 +1 @@
+ALTER TABLE "red_packets" ALTER COLUMN "currency_precision" SET DATA TYPE integer;

tonesc-red-packet/drizzle/meta/0005_snapshot.json

@@ -0,0 +1,215 @@
+{
+  "id": "d833ecb6-de56-4777-8907-a8d8d7737a24",
+  "prevId": "11a8b31d-ae2f-40d8-81fc-8a6b3bdcdd48",
+  "version": "7",
+  "dialect": "postgresql",
+  "tables": {
+    "public.red_packet_draws": {
+      "name": "red_packet_draws",
+      "schema": "",
+      "columns": {
+        "id": {
+          "name": "id",
+          "type": "text",
+          "primaryKey": true,
+          "notNull": true
+        },
+        "red_packet_id": {
+          "name": "red_packet_id",
+          "type": "text",
+          "primaryKey": false,
+          "notNull": true
+        },
+        "user_id": {
+          "name": "user_id",
+          "type": "text",
+          "primaryKey": false,
+          "notNull": true
+        },
+        "amount": {
+          "name": "amount",
+          "type": "numeric(38, 8)",
+          "primaryKey": false,
+          "notNull": true
+        },
+        "created_at": {
+          "name": "created_at",
+          "type": "timestamp with time zone",
+          "primaryKey": false,
+          "notNull": true,
+          "default": "now()"
+        }
+      },
+      "indexes": {
+        "idx_red_packet_draws_packet_id_created_at": {
+          "name": "idx_red_packet_draws_packet_id_created_at",
+          "columns": [
+            {
+              "expression": "red_packet_id",
+              "isExpression": false,
+              "asc": true,
+              "nulls": "last"
+            },
+            {
+              "expression": "\"created_at\" desc",
+              "asc": true,
+              "isExpression": true,
+              "nulls": "last"
+            }
+          ],
+          "isUnique": false,
+          "concurrently": false,
+          "method": "btree",
+          "with": {}
+        }
+      },
+      "foreignKeys": {},
+      "compositePrimaryKeys": {},
+      "uniqueConstraints": {},
+      "policies": {},
+      "checkConstraints": {},
+      "isRLSEnabled": false
+    },
+    "public.red_packets": {
+      "name": "red_packets",
+      "schema": "",
+      "columns": {
+        "id": {
+          "name": "id",
+          "type": "text",
+          "primaryKey": true,
+          "notNull": true,
+          "default": "gen_random_uuid()"
+        },
+        "public_id": {
+          "name": "public_id",
+          "type": "text",
+          "primaryKey": false,
+          "notNull": true
+        },
+        "admin_id": {
+          "name": "admin_id",
+          "type": "text",
+          "primaryKey": false,
+          "notNull": true
+        },
+        "count": {
+          "name": "count",
+          "type": "integer",
+          "primaryKey": false,
+          "notNull": true
+        },
+        "currency_name": {
+          "name": "currency_name",
+          "type": "text",
+          "primaryKey": false,
+          "notNull": true
+        },
+        "currency_precision": {
+          "name": "currency_precision",
+          "type": "numeric(20, 10)",
+          "primaryKey": false,
+          "notNull": true
+        },
+        "rule": {
+          "name": "rule",
+          "type": "jsonb",
+          "primaryKey": false,
+          "notNull": true
+        },
+        "max_draw_times": {
+          "name": "max_draw_times",
+          "type": "integer",
+          "primaryKey": false,
+          "notNull": false
+        },
+        "created_at": {
+          "name": "created_at",
+          "type": "timestamp with time zone",
+          "primaryKey": false,
+          "notNull": true,
+          "default": "now()"
+        }
+      },
+      "indexes": {
+        "uniq_red_packets_public_id": {
+          "name": "uniq_red_packets_public_id",
+          "columns": [
+            {
+              "expression": "public_id",
+              "isExpression": false,
+              "asc": true,
+              "nulls": "last"
+            }
+          ],
+          "isUnique": true,
+          "concurrently": false,
+          "method": "btree",
+          "with": {}
+        },
+        "uniq_red_packets_admin_id": {
+          "name": "uniq_red_packets_admin_id",
+          "columns": [
+            {
+              "expression": "admin_id",
+              "isExpression": false,
+              "asc": true,
+              "nulls": "last"
+            }
+          ],
+          "isUnique": true,
+          "concurrently": false,
+          "method": "btree",
+          "with": {}
+        },
+        "idx_red_packets_public_id": {
+          "name": "idx_red_packets_public_id",
+          "columns": [
+            {
+              "expression": "public_id",
+              "isExpression": false,
+              "asc": true,
+              "nulls": "last"
+            }
+          ],
+          "isUnique": false,
+          "concurrently": false,
+          "method": "btree",
+          "with": {}
+        },
+        "idx_red_packets_admin_id": {
+          "name": "idx_red_packets_admin_id",
+          "columns": [
+            {
+              "expression": "admin_id",
+              "isExpression": false,
+              "asc": true,
+              "nulls": "last"
+            }
+          ],
+          "isUnique": false,
+          "concurrently": false,
+          "method": "btree",
+          "with": {}
+        }
+      },
+      "foreignKeys": {},
+      "compositePrimaryKeys": {},
+      "uniqueConstraints": {},
+      "policies": {},
+      "checkConstraints": {},
+      "isRLSEnabled": false
+    }
+  },
+  "enums": {},
+  "schemas": {},
+  "sequences": {},
+  "roles": {},
+  "policies": {},
+  "views": {},
+  "_meta": {
+    "columns": {},
+    "schemas": {},
+    "tables": {}
+  }
+}

tonesc-red-packet/drizzle/meta/0006_snapshot.json

@@ -0,0 +1,215 @@
+{
+  "id": "c91ad204-8ce6-4029-9490-763ed4dcc177",
+  "prevId": "d833ecb6-de56-4777-8907-a8d8d7737a24",
+  "version": "7",
+  "dialect": "postgresql",
+  "tables": {
+    "public.red_packet_draws": {
+      "name": "red_packet_draws",
+      "schema": "",
+      "columns": {
+        "id": {
+          "name": "id",
+          "type": "text",
+          "primaryKey": true,
+          "notNull": true
+        },
+        "red_packet_id": {
+          "name": "red_packet_id",
+          "type": "text",
+          "primaryKey": false,
+          "notNull": true
+        },
+        "user_id": {
+          "name": "user_id",
+          "type": "text",
+          "primaryKey": false,
+          "notNull": true
+        },
+        "amount": {
+          "name": "amount",
+          "type": "numeric(38, 8)",
+          "primaryKey": false,
+          "notNull": true
+        },
+        "created_at": {
+          "name": "created_at",
+          "type": "timestamp with time zone",
+          "primaryKey": false,
+          "notNull": true,
+          "default": "now()"
+        }
+      },
+      "indexes": {
+        "idx_red_packet_draws_packet_id_created_at": {
+          "name": "idx_red_packet_draws_packet_id_created_at",
+          "columns": [
+            {
+              "expression": "red_packet_id",
+              "isExpression": false,
+              "asc": true,
+              "nulls": "last"
+            },
+            {
+              "expression": "\"created_at\" desc",
+              "asc": true,
+              "isExpression": true,
+              "nulls": "last"
+            }
+          ],
+          "isUnique": false,
+          "concurrently": false,
+          "method": "btree",
+          "with": {}
+        }
+      },
+      "foreignKeys": {},
+      "compositePrimaryKeys": {},
+      "uniqueConstraints": {},
+      "policies": {},
+      "checkConstraints": {},
+      "isRLSEnabled": false
+    },
+    "public.red_packets": {
+      "name": "red_packets",
+      "schema": "",
+      "columns": {
+        "id": {
+          "name": "id",
+          "type": "text",
+          "primaryKey": true,
+          "notNull": true,
+          "default": "gen_random_uuid()"
+        },
+        "public_id": {
+          "name": "public_id",
+          "type": "text",
+          "primaryKey": false,
+          "notNull": true
+        },
+        "admin_id": {
+          "name": "admin_id",
+          "type": "text",
+          "primaryKey": false,
+          "notNull": true
+        },
+        "count": {
+          "name": "count",
+          "type": "integer",
+          "primaryKey": false,
+          "notNull": true
+        },
+        "currency_name": {
+          "name": "currency_name",
+          "type": "text",
+          "primaryKey": false,
+          "notNull": true
+        },
+        "currency_precision": {
+          "name": "currency_precision",
+          "type": "integer",
+          "primaryKey": false,
+          "notNull": true
+        },
+        "rule": {
+          "name": "rule",
+          "type": "jsonb",
+          "primaryKey": false,
+          "notNull": true
+        },
+        "max_draw_times": {
+          "name": "max_draw_times",
+          "type": "integer",
+          "primaryKey": false,
+          "notNull": false
+        },
+        "created_at": {
+          "name": "created_at",
+          "type": "timestamp with time zone",
+          "primaryKey": false,
+          "notNull": true,
+          "default": "now()"
+        }
+      },
+      "indexes": {
+        "uniq_red_packets_public_id": {
+          "name": "uniq_red_packets_public_id",
+          "columns": [
+            {
+              "expression": "public_id",
+              "isExpression": false,
+              "asc": true,
+              "nulls": "last"
+            }
+          ],
+          "isUnique": true,
+          "concurrently": false,
+          "method": "btree",
+          "with": {}
+        },
+        "uniq_red_packets_admin_id": {
+          "name": "uniq_red_packets_admin_id",
+          "columns": [
+            {
+              "expression": "admin_id",
+              "isExpression": false,
+              "asc": true,
+              "nulls": "last"
+            }
+          ],
+          "isUnique": true,
+          "concurrently": false,
+          "method": "btree",
+          "with": {}
+        },
+        "idx_red_packets_public_id": {
+          "name": "idx_red_packets_public_id",
+          "columns": [
+            {
+              "expression": "public_id",
+              "isExpression": false,
+              "asc": true,
+              "nulls": "last"
+            }
+          ],
+          "isUnique": false,
+          "concurrently": false,
+          "method": "btree",
+          "with": {}
+        },
+        "idx_red_packets_admin_id": {
+          "name": "idx_red_packets_admin_id",
+          "columns": [
+            {
+              "expression": "admin_id",
+              "isExpression": false,
+              "asc": true,
+              "nulls": "last"
+            }
+          ],
+          "isUnique": false,
+          "concurrently": false,
+          "method": "btree",
+          "with": {}
+        }
+      },
+      "foreignKeys": {},
+      "compositePrimaryKeys": {},
+      "uniqueConstraints": {},
+      "policies": {},
+      "checkConstraints": {},
+      "isRLSEnabled": false
+    }
+  },
+  "enums": {},
+  "schemas": {},
+  "sequences": {},
+  "roles": {},
+  "policies": {},
+  "views": {},
+  "_meta": {
+    "columns": {},
+    "schemas": {},
+    "tables": {}
+  }
+}

tonesc-red-packet/drizzle/meta/_journal.json

@@ -36,6 +36,20 @@
       "when": 1767792389199,
       "tag": "0004_overconfident_nova",
       "breakpoints": true
+    },
+    {
+      "idx": 5,
+      "version": "7",
+      "when": 1767924016559,
+      "tag": "0005_quiet_leech",
+      "breakpoints": true
+    },
+    {
+      "idx": 6,
+      "version": "7",
+      "when": 1767924109495,
+      "tag": "0006_rare_maginty",
+      "breakpoints": true
     }
   ]
 }

tonesc-red-packet/lib/currency.ts

@@ -1,15 +0,0 @@
-/**
- * 从最小单位（step）中推导小数位数
- *
- * "1.00000000"   -> 0
- * "0.01000000"   -> 2
- * "0.00010000"   -> 4
- */
-export function getDecimalPlacesFromStep(step: string): number {
-    const [, decimal = ""] = step.split(".")
-
-    if (!decimal) return 0
-
-    const index = decimal.search(/[1-9]/)
-    return index === -1 ? 0 : index + 1
-}

tonesc-red-packet/lib/utils.ts

@@ -4,3 +4,48 @@ import { twMerge } from "tailwind-merge"
 export function cn(...inputs: ClassValue[]) {
   return twMerge(clsx(inputs))
 }
+
+export function parseAmountToInt(amountStr: string, precision: number): bigint {
+  // 例："123.45", precision=2 → 12345n
+  // 例："0.00001234", precision=8 → 1234n
+
+  // 去掉正负号处理（如不需要可删）
+  const negative = amountStr.startsWith("-")
+  const normalizedStr = negative ? amountStr.slice(1) : amountStr
+
+  const [intPart, fracRaw = ""] = normalizedStr.split(".")
+
+  // 关键修复点：允许尾随 0
+  const fracTrimmed = fracRaw.replace(/0+$/, "")
+
+  if (fracTrimmed.length > precision) {
+    throw new Error(
+      `Amount ${amountStr} exceeds allowed precision ${precision}`
+    )
+  }
+
+  const paddedFrac = fracTrimmed.padEnd(precision, "0")
+  const combined = intPart + paddedFrac
+
+  const value = BigInt(combined)
+
+  return negative ? -value : value
+}
+
+export function formatAmountFromInt(value: bigint, precision: number): string {
+  const s = value.toString().padStart(precision + 1, "0")
+
+  if (precision === 0) return s
+
+  const i = s.length - precision
+  return `${s.slice(0, i)}.${s.slice(i)}`
+}
+
+export function randomBigInt(min: bigint, max: bigint): bigint {
+  if (max < min) throw new Error("max < min")
+
+  const range = max - min + 1n
+  const rand = BigInt(Math.floor(Math.random() * Number(range)))
+
+  return min + rand
+}

tonesc-red-packet/lib/validate-red-packet.ts

@@ -6,10 +6,6 @@ function isPositiveInteger(n: number) {
     return Number.isInteger(n) && n > 0
 }
 
-function decimalsFromPrecision(p: number) {
-    return p.toString().split(".")[1]?.length ?? 0
-}
-
 function isValidAmountByPrecision(
     value: string,
     precision: number
@@ -18,9 +14,8 @@ function isValidAmountByPrecision(
     const num = Number(value)
     if (Number.isNaN(num) || num < 0) return false
 
-    const decimals = decimalsFromPrecision(precision)
     const [, frac = ""] = value.split(".")
-    return frac.length <= decimals
+    return frac.length <= precision
 }
 
 /* ---------- result type ---------- */
@@ -42,12 +37,12 @@ export function validateCreateRedPacketPayload(
     }
 
     /* 金额单位 */
-    if (!currency.name) {
+    if (!currency.name.trim()) {
         return { ok: false, message: "金额单位名称不能为空" }
     }
 
-    if (currency.precision <= 0) {
-        return { ok: false, message: "金额精度必须大于 0" }
+    if (currency.precision < 0 || currency.precision > 8) {
+        return { ok: false, message: "金额精度必须大于 0 且小于 8" }
     }
 
     /* 抽取次数 */

tonesc-red-packet/tsconfig.json

@@ -1,6 +1,6 @@
 {
   "compilerOptions": {
-    "target": "ES2017",
+    "target": "ES2020",
     "lib": ["dom", "dom.iterable", "esnext"],
     "allowJs": true,
     "skipLibCheck": true,