user-added liquidity provision panel (#90)
* user-added liquidity provision panel * AddLiquidityPanel: handle loading, errors * ContractInfoDialog: don't show add liquidity when market is closed * ContractInfoDialog: hide add liquidity for FR
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35
common/add-liquidity.ts
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35
common/add-liquidity.ts
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import { addCpmmLiquidity, getCpmmLiquidity } from './calculate-cpmm'
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import { Binary, CPMM, FullContract } from './contract'
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import { LiquidityProvision } from './liquidity-provision'
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import { User } from './user'
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export const getNewLiquidityProvision = (
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user: User,
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amount: number,
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contract: FullContract<CPMM, Binary>,
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newLiquidityProvisionId: string
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) => {
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const { pool, p, totalLiquidity } = contract
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const { newPool, newP } = addCpmmLiquidity(pool, p, amount)
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const liquidity =
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getCpmmLiquidity(newPool, newP) - getCpmmLiquidity(pool, newP)
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const newLiquidityProvision: LiquidityProvision = {
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id: newLiquidityProvisionId,
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userId: user.id,
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contractId: contract.id,
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amount,
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pool: newPool,
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p: newP,
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liquidity,
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createdTime: Date.now(),
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}
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const newTotalLiquidity = (totalLiquidity ?? 0) + amount
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const newBalance = user.balance - amount
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return { newLiquidityProvision, newPool, newP, newBalance, newTotalLiquidity }
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}
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103
functions/src/add-liquidity.ts
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103
functions/src/add-liquidity.ts
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import * as functions from 'firebase-functions'
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import * as admin from 'firebase-admin'
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import { Contract } from '../../common/contract'
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import { User } from '../../common/user'
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import { removeUndefinedProps } from '../../common/util/object'
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import { redeemShares } from './redeem-shares'
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import { getNewLiquidityProvision } from '../../common/add-liquidity'
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export const addLiquidity = functions.runWith({ minInstances: 1 }).https.onCall(
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async (
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data: {
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amount: number
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contractId: string
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},
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context
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) => {
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const userId = context?.auth?.uid
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if (!userId) return { status: 'error', message: 'Not authorized' }
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const { amount, contractId } = data
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if (amount <= 0 || isNaN(amount) || !isFinite(amount))
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return { status: 'error', message: 'Invalid amount' }
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// run as transaction to prevent race conditions
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return await firestore
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.runTransaction(async (transaction) => {
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const userDoc = firestore.doc(`users/${userId}`)
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const userSnap = await transaction.get(userDoc)
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if (!userSnap.exists)
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return { status: 'error', message: 'User not found' }
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const user = userSnap.data() as User
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const contractDoc = firestore.doc(`contracts/${contractId}`)
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const contractSnap = await transaction.get(contractDoc)
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if (!contractSnap.exists)
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return { status: 'error', message: 'Invalid contract' }
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const contract = contractSnap.data() as Contract
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if (
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contract.mechanism !== 'cpmm-1' ||
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contract.outcomeType !== 'BINARY'
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)
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return { status: 'error', message: 'Invalid contract' }
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const { closeTime } = contract
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if (closeTime && Date.now() > closeTime)
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return { status: 'error', message: 'Trading is closed' }
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if (user.balance < amount)
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return { status: 'error', message: 'Insufficient balance' }
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const newLiquidityProvisionDoc = firestore
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.collection(`contracts/${contractId}/liquidity`)
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.doc()
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const {
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newLiquidityProvision,
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newPool,
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newP,
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newBalance,
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newTotalLiquidity,
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} = getNewLiquidityProvision(
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user,
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amount,
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contract,
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newLiquidityProvisionDoc.id
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)
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if (newP !== undefined && !isFinite(newP)) {
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return {
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status: 'error',
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message: 'Liquidity injection rejected due to overflow error.',
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}
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}
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transaction.update(
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contractDoc,
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removeUndefinedProps({
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pool: newPool,
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p: newP,
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totalLiquidity: newTotalLiquidity,
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})
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)
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if (!isFinite(newBalance)) {
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throw new Error('Invalid user balance for ' + user.username)
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}
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transaction.update(userDoc, { balance: newBalance })
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transaction.create(newLiquidityProvisionDoc, newLiquidityProvision)
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return { status: 'success', newLiquidityProvision }
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})
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.then(async (result) => {
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await redeemShares(userId, contractId)
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return result
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})
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}
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)
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const firestore = admin.firestore()
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@ -21,3 +21,4 @@ export * from './update-user-metrics'
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export * from './backup-db'
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export * from './change-user-info'
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export * from './market-close-emails'
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export * from './add-liquidity'
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85
web/components/add-liquidity-panel.tsx
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85
web/components/add-liquidity-panel.tsx
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@ -0,0 +1,85 @@
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import clsx from 'clsx'
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import { useState } from 'react'
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import { Contract } from '../../common/contract'
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import { formatMoney } from '../../common/util/format'
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import { useUser } from '../hooks/use-user'
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import { addLiquidity } from '../lib/firebase/api-call'
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import { AmountInput } from './amount-input'
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import { Row } from './layout/row'
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export function AddLiquidityPanel(props: { contract: Contract }) {
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const { contract } = props
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const { id: contractId } = contract
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const user = useUser()
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const [amount, setAmount] = useState<number | undefined>(undefined)
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const [error, setError] = useState<string | undefined>(undefined)
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const [isSuccess, setIsSuccess] = useState(false)
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const [isLoading, setIsLoading] = useState(false)
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const onAmountChange = (amount: number | undefined) => {
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setIsSuccess(false)
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setAmount(amount)
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// Check for errors.
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if (amount !== undefined) {
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if (user && user.balance < amount) {
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setError('Insufficient balance')
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} else if (amount < 1) {
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setError('Minimum amount: ' + formatMoney(1))
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} else {
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setError(undefined)
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}
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}
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}
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const submit = () => {
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if (!amount) return
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setIsLoading(true)
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setIsSuccess(false)
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addLiquidity({ amount, contractId })
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.then((r) => {
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if (r.status === 'success') {
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setIsSuccess(true)
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setError(undefined)
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setIsLoading(false)
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} else {
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setError('Server error')
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}
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})
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.catch((e) => setError('Server error'))
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}
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return (
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<>
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<div>Subsidize this market by adding liquidity for traders.</div>
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<Row>
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<AmountInput
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amount={amount}
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onChange={onAmountChange}
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label="M$"
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error={error}
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disabled={isLoading}
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/>
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<button
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className={clsx('btn btn-primary ml-2', isLoading && 'btn-disabled')}
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onClick={submit}
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disabled={isLoading}
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>
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Add
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</button>
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</Row>
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{isSuccess && amount && (
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<div>Success! Added {formatMoney(amount)} in liquidity.</div>
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)}
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{isLoading && <div>Processing...</div>}
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</>
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)
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}
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@ -11,6 +11,7 @@ import {
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contractPath,
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getBinaryProbPercent,
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} from '../../lib/firebase/contracts'
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import { AddLiquidityPanel } from '../add-liquidity-panel'
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import { CopyLinkButton } from '../copy-link-button'
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import { Col } from '../layout/col'
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import { Modal } from '../layout/modal'
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<div className="text-gray-500">Tags</div>
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<TagsInput contract={contract} />
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<div />
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{contract.mechanism === 'cpmm-1' &&
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!contract.resolution &&
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(!closeTime || closeTime > Date.now()) && (
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<>
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<div className="text-gray-500">Add liquidity</div>
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<AddLiquidityPanel contract={contract} />
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</>
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)}
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</Col>
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</Modal>
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</>
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@ -66,3 +66,9 @@ export const changeUserInfo = (data: {
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.then((r) => r.data as { status: string; message?: string })
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.catch((e) => ({ status: 'error', message: e.message }))
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}
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export const addLiquidity = (data: { amount: number; contractId: string }) => {
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return cloudFunction('addLiquidity')(data)
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.then((r) => r.data as { status: string })
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.catch((e) => ({ status: 'error', message: e.message }))
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}
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