92 lines
2.5 KiB
TypeScript
92 lines
2.5 KiB
TypeScript
import * as admin from 'firebase-admin'
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import { Contract } from '../../common/contract'
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import { PrivateUser, User } from '../../common/user'
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export const isProd =
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admin.instanceId().app.options.projectId === 'mantic-markets'
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export const getDoc = async <T>(collection: string, doc: string) => {
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const snap = await admin.firestore().collection(collection).doc(doc).get()
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return snap.exists ? (snap.data() as T) : undefined
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}
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export const getValue = async <T>(ref: admin.firestore.DocumentReference) => {
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const snap = await ref.get()
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return snap.exists ? (snap.data() as T) : undefined
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}
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export const getValues = async <T>(query: admin.firestore.Query) => {
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const snap = await query.get()
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return snap.docs.map((doc) => doc.data() as T)
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}
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export const getContract = (contractId: string) => {
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return getDoc<Contract>('contracts', contractId)
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}
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export const getUser = (userId: string) => {
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return getDoc<User>('users', userId)
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}
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export const getPrivateUser = (userId: string) => {
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return getDoc<PrivateUser>('private-users', userId)
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}
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export const getUserByUsername = async (username: string) => {
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const snap = await firestore
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.collection('users')
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.where('username', '==', username)
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.get()
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return snap.empty ? undefined : (snap.docs[0].data() as User)
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}
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const firestore = admin.firestore()
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const updateUserBalance = (
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userId: string,
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delta: number,
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isDeposit = false
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) => {
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return firestore.runTransaction(async (transaction) => {
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const userDoc = firestore.doc(`users/${userId}`)
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const userSnap = await transaction.get(userDoc)
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if (!userSnap.exists) return
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const user = userSnap.data() as User
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const newUserBalance = user.balance + delta
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// if (newUserBalance < 0)
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// throw new Error(
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// `User (${userId}) balance cannot be negative: ${newUserBalance}`
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// )
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if (isDeposit) {
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const newTotalDeposits = (user.totalDeposits || 0) + delta
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transaction.update(userDoc, { totalDeposits: newTotalDeposits })
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}
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transaction.update(userDoc, { balance: newUserBalance })
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})
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}
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export const payUser = (userId: string, payout: number, isDeposit = false) => {
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if (!isFinite(payout)) throw new Error('Payout is not finite: ' + payout)
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return updateUserBalance(userId, payout, isDeposit)
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}
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export const chargeUser = (
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userId: string,
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charge: number,
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isAnte?: boolean
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) => {
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if (!isFinite(charge) || charge <= 0)
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throw new Error('User charge is not positive: ' + charge)
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return updateUserBalance(userId, -charge, isAnte)
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}
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