feat: sending money / coins
This commit is contained in:
Face
parent
4e58d20e84
commit
de0987a007
14 changed files with 2825 additions and 325 deletions
259
website/src/routes/api/transfer/+server.ts
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259
website/src/routes/api/transfer/+server.ts
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@ -0,0 +1,259 @@
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import { auth } from '$lib/auth';
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import { error, json } from '@sveltejs/kit';
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import { db } from '$lib/server/db';
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import { user, userPortfolio, coin, transaction } from '$lib/server/db/schema';
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import { eq, and } from 'drizzle-orm';
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import type { RequestHandler } from './$types';
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interface TransferRequest {
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recipientUsername: string;
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type: 'CASH' | 'COIN';
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amount: number;
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coinSymbol?: string;
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}
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export const POST: RequestHandler = async ({ request }) => {
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const session = await auth.api.getSession({
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headers: request.headers
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});
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if (!session?.user) {
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throw error(401, 'Not authenticated');
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} try {
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const { recipientUsername, type, amount, coinSymbol }: TransferRequest = await request.json();
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if (!recipientUsername || !type || !amount || typeof amount !== 'number' || !Number.isFinite(amount) || amount <= 0) {
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throw error(400, 'Invalid transfer parameters');
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}
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if (amount > Number.MAX_SAFE_INTEGER) {
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throw error(400, 'Transfer amount too large');
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}
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if (type === 'COIN' && !coinSymbol) {
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throw error(400, 'Coin symbol required for coin transfers');
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}
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const senderId = Number(session.user.id);
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return await db.transaction(async (tx) => {
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const [senderData] = await tx
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.select({
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id: user.id,
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username: user.username,
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baseCurrencyBalance: user.baseCurrencyBalance
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})
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.from(user)
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.where(eq(user.id, senderId))
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.for('update')
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.limit(1);
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if (!senderData) {
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throw error(404, 'Sender not found');
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}
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const [recipientData] = await tx
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.select({
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id: user.id,
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username: user.username,
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baseCurrencyBalance: user.baseCurrencyBalance
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})
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.from(user)
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.where(eq(user.username, recipientUsername))
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.for('update')
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.limit(1);
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if (!recipientData) {
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throw error(404, 'Recipient not found');
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}
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if (senderData.id === recipientData.id) {
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throw error(400, 'Cannot transfer to yourself');
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}
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if (type === 'CASH') {
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const senderBalance = Number(senderData.baseCurrencyBalance);
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if (senderBalance < amount) {
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throw error(400, `Insufficient funds. You have $${senderBalance.toFixed(2)} but trying to send $${amount.toFixed(2)}`);
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}
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const recipientBalance = Number(recipientData.baseCurrencyBalance);
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await tx
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.update(user)
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.set({
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baseCurrencyBalance: (senderBalance - amount).toFixed(8),
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updatedAt: new Date()
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})
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.where(eq(user.id, senderId));
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await tx
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.update(user)
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.set({
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baseCurrencyBalance: (recipientBalance + amount).toFixed(8),
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updatedAt: new Date()
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})
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.where(eq(user.id, recipientData.id));
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await tx.insert(transaction).values({
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userId: senderId,
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coinId: 1,
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type: 'TRANSFER_OUT',
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quantity: '0',
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pricePerCoin: '1',
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totalBaseCurrencyAmount: amount.toString(),
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timestamp: new Date(),
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senderUserId: senderId,
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recipientUserId: recipientData.id
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});
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await tx.insert(transaction).values({
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userId: recipientData.id,
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coinId: 1,
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type: 'TRANSFER_IN',
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quantity: '0',
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pricePerCoin: '1',
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totalBaseCurrencyAmount: amount.toString(),
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timestamp: new Date(),
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senderUserId: senderId,
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recipientUserId: recipientData.id
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});
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return json({
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success: true,
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type: 'CASH',
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amount,
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recipient: recipientData.username,
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newBalance: senderBalance - amount
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});
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} else {
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const normalizedSymbol = coinSymbol!.toUpperCase();
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const [coinData] = await tx
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.select({ id: coin.id, symbol: coin.symbol, name: coin.name, currentPrice: coin.currentPrice })
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.from(coin)
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.where(eq(coin.symbol, normalizedSymbol))
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.limit(1);
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if (!coinData) {
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throw error(404, 'Coin not found');
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}
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const [senderHolding] = await tx
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.select({
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quantity: userPortfolio.quantity
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})
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.from(userPortfolio)
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.where(and(
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eq(userPortfolio.userId, senderId),
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eq(userPortfolio.coinId, coinData.id)
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))
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.for('update')
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.limit(1);
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if (!senderHolding || Number(senderHolding.quantity) < amount) {
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const availableAmount = senderHolding ? Number(senderHolding.quantity) : 0;
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throw error(400, `Insufficient ${coinData.symbol}. You have ${availableAmount.toFixed(6)} but trying to send ${amount.toFixed(6)}`);
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}
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const [recipientHolding] = await tx
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.select({ quantity: userPortfolio.quantity })
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.from(userPortfolio)
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.where(and(
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eq(userPortfolio.userId, recipientData.id),
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eq(userPortfolio.coinId, coinData.id)
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))
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.for('update')
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.limit(1);
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const coinPrice = Number(coinData.currentPrice) || 0;
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const totalValue = amount * coinPrice;
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const newSenderQuantity = Number(senderHolding.quantity) - amount;
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if (newSenderQuantity > 0.000001) {
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await tx
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.update(userPortfolio)
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.set({
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quantity: newSenderQuantity.toString(),
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updatedAt: new Date()
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})
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.where(and(
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eq(userPortfolio.userId, senderId),
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eq(userPortfolio.coinId, coinData.id)
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));
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} else {
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await tx
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.delete(userPortfolio)
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.where(and(
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eq(userPortfolio.userId, senderId),
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eq(userPortfolio.coinId, coinData.id)
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));
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}
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if (recipientHolding) {
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const newRecipientQuantity = Number(recipientHolding.quantity) + amount;
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await tx
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.update(userPortfolio)
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.set({
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quantity: newRecipientQuantity.toString(),
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updatedAt: new Date()
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})
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.where(and(
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eq(userPortfolio.userId, recipientData.id),
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eq(userPortfolio.coinId, coinData.id)
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));
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} else {
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await tx
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.insert(userPortfolio)
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.values({
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userId: recipientData.id,
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coinId: coinData.id,
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quantity: amount.toString()
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});
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}
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await tx.insert(transaction).values({
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userId: senderId,
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coinId: coinData.id,
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type: 'TRANSFER_OUT',
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quantity: amount.toString(),
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pricePerCoin: coinPrice.toString(),
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totalBaseCurrencyAmount: totalValue.toString(),
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timestamp: new Date(),
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senderUserId: senderId,
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recipientUserId: recipientData.id
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});
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await tx.insert(transaction).values({
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userId: recipientData.id,
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coinId: coinData.id,
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type: 'TRANSFER_IN',
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quantity: amount.toString(),
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pricePerCoin: coinPrice.toString(),
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totalBaseCurrencyAmount: totalValue.toString(),
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timestamp: new Date(),
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senderUserId: senderId,
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recipientUserId: recipientData.id
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});
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return json({
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success: true,
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type: 'COIN',
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amount,
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coinSymbol: coinData.symbol,
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coinName: coinData.name,
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recipient: recipientData.username,
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newQuantity: newSenderQuantity
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});
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}
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});
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} catch (e) {
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console.error('Transfer error:', e);
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if (e && typeof e === 'object' && 'status' in e) {
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throw e;
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}
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return json({ error: 'Transfer failed' }, { status: 500 });
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}
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};
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