diff --git a/backend/src/graphql/resolver/TransactionLinkResolver.ts b/backend/src/graphql/resolver/TransactionLinkResolver.ts index a5c4a5f01..1b3558bb2 100644 --- a/backend/src/graphql/resolver/TransactionLinkResolver.ts +++ b/backend/src/graphql/resolver/TransactionLinkResolver.ts @@ -74,7 +74,10 @@ export class TransactionLinkResolver { const holdAvailableAmount = amount.minus(calculateDecay(amount, createdDate, validUntil).decay) // validate amount - await calculateBalance(user.id, holdAvailableAmount, createdDate) + const sendBalance = await calculateBalance(user.id, holdAvailableAmount.mul(-1), createdDate) + if (!sendBalance) { + throw new Error("user hasn't enough GDD or amount is < 0") + } const transactionLink = dbTransactionLink.create() transactionLink.userId = user.id diff --git a/backend/src/graphql/resolver/TransactionResolver.test.ts b/backend/src/graphql/resolver/TransactionResolver.test.ts index 9e74623c8..f4315d359 100644 --- a/backend/src/graphql/resolver/TransactionResolver.test.ts +++ b/backend/src/graphql/resolver/TransactionResolver.test.ts @@ -16,7 +16,7 @@ import { stephenHawking } from '@/seeds/users/stephen-hawking' import { EventProtocol } from '@entity/EventProtocol' import { Transaction } from '@entity/Transaction' import { User } from '@entity/User' -import { cleanDB, resetToken, testEnvironment } from '@test/helpers' +import { cleanDB, testEnvironment } from '@test/helpers' import { logger } from '@test/testSetup' import { GraphQLError } from 'graphql' import { findUserByEmail } from './UserResolver' @@ -253,50 +253,21 @@ describe('send coins', () => { }), ).toEqual( expect.objectContaining({ - errors: [new GraphQLError(`User has not received any GDD yet`)], + errors: [new GraphQLError(`user hasn't enough GDD or amount is < 0`)], }), ) }) it('logs the error thrown', () => { expect(logger.error).toBeCalledWith( - `No prior transaction found for user with id: ${user[1].id}`, + `user hasn't enough GDD or amount is < 0 : balance=null`, ) }) }) - - describe('sending negative amount', () => { - it('throws an error', async () => { - jest.clearAllMocks() - expect( - await mutate({ - mutation: sendCoins, - variables: { - email: 'peter@lustig.de', - amount: -50, - memo: 'testing negative', - }, - }), - ).toEqual( - expect.objectContaining({ - errors: [new GraphQLError('Transaction amount must be greater than 0')], - }), - ) - }) - - it('logs the error thrown', () => { - expect(logger.error).toBeCalledWith('Transaction amount must be greater than 0: -50') - }) - }) }) describe('user has some GDD', () => { beforeAll(async () => { - resetToken() - - // login as bob again - await query({ mutation: login, variables: bobData }) - // create contribution as user bob const contribution = await mutate({ mutation: createContribution, @@ -316,6 +287,37 @@ describe('send coins', () => { await query({ mutation: login, variables: bobData }) }) + afterAll(async () => { + await cleanDB() + }) + + /* + describe('trying to send negative amount', () => { + it('throws an error', async () => { + expect( + await mutate({ + mutation: sendCoins, + variables: { + email: 'peter@lustig.de', + amount: -50, + memo: 'testing negative', + }, + }), + ).toEqual( + expect.objectContaining({ + errors: [new GraphQLError(`user hasn't enough GDD or amount is < 0`)], + }), + ) + }) + + it('logs the error thrown', () => { + expect(logger.error).toBeCalledWith( + `user hasn't enough GDD or amount is < 0 : balance=null`, + ) + }) + }) + */ + describe('good transaction', () => { it('sends the coins', async () => { expect( diff --git a/backend/src/graphql/resolver/TransactionResolver.ts b/backend/src/graphql/resolver/TransactionResolver.ts index f0fb2f452..594039cfd 100644 --- a/backend/src/graphql/resolver/TransactionResolver.ts +++ b/backend/src/graphql/resolver/TransactionResolver.ts @@ -39,7 +39,6 @@ import { findUserByEmail } from './UserResolver' import { sendTransactionLinkRedeemedEmail } from '@/mailer/sendTransactionLinkRedeemed' import { Event, EventTransactionReceive, EventTransactionSend } from '@/event/Event' import { eventProtocol } from '@/event/EventProtocolEmitter' -import { Decay } from '../model/Decay' export const executeTransaction = async ( amount: Decimal, @@ -69,8 +68,17 @@ export const executeTransaction = async ( // validate amount const receivedCallDate = new Date() - - const sendBalance = await calculateBalance(sender.id, amount, receivedCallDate, transactionLink) + const sendBalance = await calculateBalance( + sender.id, + amount.mul(-1), + receivedCallDate, + transactionLink, + ) + logger.debug(`calculated Balance=${sendBalance}`) + if (!sendBalance) { + logger.error(`user hasn't enough GDD or amount is < 0 : balance=${sendBalance}`) + throw new Error("user hasn't enough GDD or amount is < 0") + } const queryRunner = getConnection().createQueryRunner() await queryRunner.connect() @@ -100,24 +108,7 @@ export const executeTransaction = async ( transactionReceive.userId = recipient.id transactionReceive.linkedUserId = sender.id transactionReceive.amount = amount - - // state received balance - let receiveBalance: { - balance: Decimal - decay: Decay - lastTransactionId: number - } | null - - // try received balance - try { - receiveBalance = await calculateBalance(recipient.id, amount, receivedCallDate) - } catch (e) { - logger.info( - `User with no transactions sent: ${recipient.id}, has received a transaction of ${amount} GDD from user: ${sender.id}`, - ) - receiveBalance = null - } - + const receiveBalance = await calculateBalance(recipient.id, amount, receivedCallDate) transactionReceive.balance = receiveBalance ? receiveBalance.balance : amount transactionReceive.balanceDate = receivedCallDate transactionReceive.decay = receiveBalance ? receiveBalance.decay.decay : new Decimal(0) diff --git a/backend/src/util/utilities.ts b/backend/src/util/utilities.ts index 65214ebb5..9abb31554 100644 --- a/backend/src/util/utilities.ts +++ b/backend/src/util/utilities.ts @@ -1,17 +1,5 @@ -import Decimal from 'decimal.js-light' - export const objectValuesToArray = (obj: { [x: string]: string }): Array => { return Object.keys(obj).map(function (key) { return obj[key] }) } - -// to improve code readability, as String is needed, it is handled inside this utility function -export const decimalAddition = (a: Decimal, b: Decimal): Decimal => { - return a.add(b.toString()) -} - -// to improve code readability, as String is needed, it is handled inside this utility function -export const decimalSubtraction = (a: Decimal, b: Decimal): Decimal => { - return a.minus(b.toString()) -} diff --git a/backend/src/util/validate.ts b/backend/src/util/validate.ts index 9640cc614..edd8d55f6 100644 --- a/backend/src/util/validate.ts +++ b/backend/src/util/validate.ts @@ -5,8 +5,6 @@ import { Decay } from '@model/Decay' import { getCustomRepository } from '@dbTools/typeorm' import { TransactionLinkRepository } from '@repository/TransactionLink' import { TransactionLink as dbTransactionLink } from '@entity/TransactionLink' -import { decimalSubtraction, decimalAddition } from './utilities' -import { backendLogger as logger } from '@/server/logger' function isStringBoolean(value: string): boolean { const lowerValue = value.toLowerCase() @@ -25,26 +23,13 @@ async function calculateBalance( amount: Decimal, time: Date, transactionLink?: dbTransactionLink | null, -): Promise<{ balance: Decimal; decay: Decay; lastTransactionId: number }> { - // negative or empty amount should not be allowed - if (amount.lessThanOrEqualTo(0)) { - logger.error(`Transaction amount must be greater than 0: ${amount}`) - throw new Error('Transaction amount must be greater than 0') - } - - // check if user has prior transactions +): Promise<{ balance: Decimal; decay: Decay; lastTransactionId: number } | null> { const lastTransaction = await Transaction.findOne({ userId }, { order: { balanceDate: 'DESC' } }) - - if (!lastTransaction) { - logger.error(`No prior transaction found for user with id: ${userId}`) - throw new Error('User has not received any GDD yet') - } + if (!lastTransaction) return null const decay = calculateDecay(lastTransaction.balance, lastTransaction.balanceDate, time) - // new balance is the old balance minus the amount used - const balance = decimalSubtraction(decay.balance, amount) - + const balance = decay.balance.add(amount.toString()) const transactionLinkRepository = getCustomRepository(TransactionLinkRepository) const { sumHoldAvailableAmount } = await transactionLinkRepository.summary(userId, time) @@ -52,16 +37,11 @@ async function calculateBalance( // else we cannot redeem links which are more or equal to half of what an account actually owns const releasedLinkAmount = transactionLink ? transactionLink.holdAvailableAmount : new Decimal(0) - const availableBalance = decimalSubtraction(balance, sumHoldAvailableAmount) - - if (decimalAddition(availableBalance, releasedLinkAmount).lessThan(0)) { - logger.error( - `Not enough funds for a transaction of ${amount} GDD, user with id: ${userId} has only ${balance} GDD available`, - ) - throw new Error('Not enough funds for transaction') + if ( + balance.minus(sumHoldAvailableAmount.toString()).plus(releasedLinkAmount.toString()).lessThan(0) + ) { + return null } - - logger.debug(`calculated Balance=${balance}`) return { balance, lastTransactionId: lastTransaction.id, decay } }