117 lines
2.8 KiB
TypeScript
117 lines
2.8 KiB
TypeScript
import { Guild, User } from "discord.js";
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import prisma from "../../handlers/database";
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// Start an transaction between two users in a guild.
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export const transfer = async (
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guild: Guild,
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from: User,
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to: User,
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amount: number
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) => {
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return await prisma.$transaction(async (tx) => {
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// 1. Decrement amount from the sender.
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const sender = await tx.guildMember.upsert({
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update: {
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creditsEarned: {
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decrement: amount,
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},
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},
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create: {
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user: {
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connectOrCreate: {
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create: {
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id: from.id,
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},
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where: {
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id: from.id,
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},
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},
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},
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guild: {
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connectOrCreate: {
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create: {
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id: guild.id,
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},
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where: {
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id: guild.id,
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},
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},
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},
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creditsEarned: -amount,
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},
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where: {
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userId_guildId: {
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userId: from.id,
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guildId: guild.id,
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},
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},
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});
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// 2. Verify that the sender actually is created.
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if (!sender) throw new Error("No sender available");
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// 3. Verify that the sender's balance exists.
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if (!sender.creditsEarned) throw new Error("No credits available");
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// 4. Verify that the sender's balance didn't go below zero.
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if (sender.creditsEarned < 0) {
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throw new Error(`${from} doesn't have enough to send ${amount}`);
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}
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// 5. Verify that the sender is not trying to send less that one credits.
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if (amount <= 0) {
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throw new Error("You can't transfer below one credit.");
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}
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// 6. Verify that the sender is not trying to send more than 100.000.000 credits.
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if (amount > 100000000) {
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throw new Error("You can't transfer more than 100.000.000 credits.");
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}
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// 7. Verify that recipient are not an bot.
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if (to.bot) throw new Error("You can't transfer to an bot.");
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// 8. Verify that sender and recipient are not the same user.
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if (from.id === to.id) throw new Error("You can't transfer to yourself.");
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// 9. Increment the recipient's balance by amount.
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const recipient = await tx.guildMember.upsert({
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update: {
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creditsEarned: {
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increment: amount,
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},
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},
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create: {
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user: {
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connectOrCreate: {
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create: {
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id: to.id,
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},
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where: {
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id: to.id,
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},
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},
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},
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guild: {
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connectOrCreate: {
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create: {
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id: guild.id,
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},
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where: {
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id: guild.id,
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},
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},
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},
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creditsEarned: amount,
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},
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where: {
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userId_guildId: {
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userId: to.id,
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guildId: guild.id,
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},
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},
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});
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return recipient;
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});
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};
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