402 lines
11 KiB
TypeScript
402 lines
11 KiB
TypeScript
import clsx from 'clsx'
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import React, { useEffect, useState } from 'react'
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import _ from 'lodash'
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import { useUser } from '../hooks/use-user'
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import { Binary, CPMM, DPM, FullContract } from '../../common/contract'
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import { Col } from './layout/col'
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import { Row } from './layout/row'
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import { Spacer } from './layout/spacer'
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import { YesNoSelector } from './yes-no-selector'
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import {
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formatMoney,
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formatPercent,
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formatWithCommas,
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} from '../../common/util/format'
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import { Title } from './title'
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import { firebaseLogin, User } from '../lib/firebase/users'
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import { Bet } from '../../common/bet'
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import { placeBet } from '../lib/firebase/api-call'
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import { BuyAmountInput, SellAmountInput } from './amount-input'
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import { InfoTooltip } from './info-tooltip'
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import { OutcomeLabel } from './outcome-label'
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import {
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calculatePayoutAfterCorrectBet,
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calculateShares,
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getProbability,
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getOutcomeProbabilityAfterBet,
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} from '../../common/calculate'
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import { useFocus } from '../hooks/use-focus'
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import { useUserContractBets } from '../hooks/use-user-bets'
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import {
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calculateCpmmSale,
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getCpmmProbability,
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} from '../../common/calculate-cpmm'
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export function BetPanel(props: {
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contract: FullContract<DPM | CPMM, Binary>
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className?: string
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title?: string // Set if BetPanel is on a feed modal
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selected?: 'YES' | 'NO'
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onBetSuccess?: () => void
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}) {
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const { contract, className, title, selected, onBetSuccess } = props
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const user = useUser()
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const userBets = useUserContractBets(user?.id, contract.id) ?? []
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const [tradeType, setTradeType] = useState<'BUY' | 'SELL'>('BUY')
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const [yesBets, noBets] = _.partition(
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userBets,
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(bet) => bet.outcome === 'YES'
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)
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const [yesShares, noShares] = [
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_.sumBy(yesBets, (bet) => bet.shares),
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_.sumBy(noBets, (bet) => bet.shares),
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]
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const sharesOutcome = yesShares ? 'YES' : noShares ? 'NO' : undefined
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return (
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<Col>
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{sharesOutcome && (
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<Col className="rounded-t-md px-6 py-6 bg-gray-100">
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<Row className="justify-between items-center gap-2">
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<div>
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You have {formatWithCommas(Math.floor(yesShares || noShares))}{' '}
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<OutcomeLabel outcome={sharesOutcome} /> shares
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</div>
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<button
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className="btn btn-sm"
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style={{
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backgroundColor: 'white',
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border: '2px solid',
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color: '#3D4451',
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}}
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onClick={() =>
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tradeType === 'BUY' ? setTradeType('SELL') : setTradeType('BUY')
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}
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>
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{tradeType === 'BUY' ? 'Sell' : 'Buy'}
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</button>
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</Row>
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</Col>
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)}
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<Col
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className={clsx(
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'rounded-b-md bg-white px-8 py-6',
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!sharesOutcome && 'rounded-t-md',
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className
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)}
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>
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<Title
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className={clsx(
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'!mt-0',
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tradeType === 'BUY' && title ? '!text-xl' : ''
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)}
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text={tradeType === 'BUY' ? title ?? 'Buy' : 'Sell'}
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/>
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{tradeType === 'SELL' && user && sharesOutcome && (
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<SellPanel
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contract={contract as FullContract<CPMM, Binary>}
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shares={yesShares || noShares}
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sharesOutcome={sharesOutcome}
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user={user}
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userBets={userBets}
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onSellSuccess={onBetSuccess}
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/>
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)}
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{tradeType === 'BUY' && (
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<BuyPanel
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contract={contract}
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user={user}
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userBets={userBets}
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selected={selected}
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onBuySuccess={onBetSuccess}
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/>
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)}
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{user === null && (
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<button
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className="btn flex-1 whitespace-nowrap border-none bg-gradient-to-r from-teal-500 to-green-500 px-10 text-lg font-medium normal-case hover:from-teal-600 hover:to-green-600"
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onClick={firebaseLogin}
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>
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Sign in to trade!
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</button>
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)}
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</Col>
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</Col>
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)
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}
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function BuyPanel(props: {
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contract: FullContract<DPM | CPMM, Binary>
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user: User | null | undefined
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userBets: Bet[]
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selected?: 'YES' | 'NO'
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onBuySuccess?: () => void
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}) {
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const { contract, user, userBets, selected, onBuySuccess } = props
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const [betChoice, setBetChoice] = useState<'YES' | 'NO' | undefined>(selected)
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const [betAmount, setBetAmount] = useState<number | undefined>(undefined)
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const [inputRef, focusAmountInput] = useFocus()
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const [error, setError] = useState<string | undefined>()
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const [isSubmitting, setIsSubmitting] = useState(false)
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const [wasSubmitted, setWasSubmitted] = useState(false)
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useEffect(() => {
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// warm up cloud function
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placeBet({}).catch()
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}, [])
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function onBetChoice(choice: 'YES' | 'NO') {
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setBetChoice(choice)
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setWasSubmitted(false)
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focusAmountInput()
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}
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function onBetChange(newAmount: number | undefined) {
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setWasSubmitted(false)
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setBetAmount(newAmount)
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if (!betChoice) {
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setBetChoice('YES')
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}
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}
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async function submitBet() {
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if (!user || !betAmount) return
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setError(undefined)
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setIsSubmitting(true)
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const result = await placeBet({
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amount: betAmount,
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outcome: betChoice,
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contractId: contract.id,
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}).then((r) => r.data as any)
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console.log('placed bet. Result:', result)
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if (result?.status === 'success') {
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setIsSubmitting(false)
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setWasSubmitted(true)
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setBetAmount(undefined)
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if (onBuySuccess) onBuySuccess()
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} else {
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setError(result?.error || 'Error placing bet')
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setIsSubmitting(false)
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}
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}
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const betDisabled = isSubmitting || !betAmount || error
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const initialProb = getProbability(contract)
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const outcomeProb = getOutcomeProbabilityAfterBet(
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contract,
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betChoice || 'YES',
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betAmount ?? 0
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)
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const resultProb = betChoice === 'NO' ? 1 - outcomeProb : outcomeProb
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const shares = calculateShares(contract, betAmount ?? 0, betChoice || 'YES')
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const currentPayout = betAmount
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? calculatePayoutAfterCorrectBet(contract, {
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outcome: betChoice,
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amount: betAmount,
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shares,
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} as Bet)
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: 0
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const currentReturn = betAmount ? (currentPayout - betAmount) / betAmount : 0
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const currentReturnPercent = formatPercent(currentReturn)
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useEffect(() => {
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focusAmountInput()
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}, [focusAmountInput])
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const tooltip =
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contract.mechanism === 'dpm-2'
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? `Current payout for ${formatWithCommas(shares)} / ${formatWithCommas(
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shares +
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contract.totalShares[betChoice ?? 'YES'] -
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(contract.phantomShares
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? contract.phantomShares[betChoice ?? 'YES']
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: 0)
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)} ${betChoice} shares`
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: undefined
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return (
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<>
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<YesNoSelector
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className="mb-4"
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selected={betChoice}
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onSelect={(choice) => onBetChoice(choice)}
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/>
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<div className="my-3 text-left text-sm text-gray-500">Amount</div>
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<BuyAmountInput
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inputClassName="w-full"
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amount={betAmount}
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onChange={onBetChange}
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userBets={userBets}
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error={error}
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setError={setError}
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disabled={isSubmitting}
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inputRef={inputRef}
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contractIdForLoan={contract.id}
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/>
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<Col className="mt-3 w-full gap-3">
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<Row className="items-center justify-between text-sm">
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<div className="text-gray-500">Probability</div>
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<Row>
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<div>{formatPercent(initialProb)}</div>
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<div className="mx-2">→</div>
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<div>{formatPercent(resultProb)}</div>
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</Row>
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</Row>
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<Row className="items-start justify-between gap-2 text-sm">
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<Row className="flex-nowrap items-center gap-2 whitespace-nowrap text-gray-500">
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<div>
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Payout if <OutcomeLabel outcome={betChoice ?? 'YES'} />
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</div>
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{tooltip && <InfoTooltip text={tooltip} />}
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</Row>
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<Row className="flex-wrap items-end justify-end gap-2">
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<span className="whitespace-nowrap">
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{formatMoney(currentPayout)}
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</span>
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<span>(+{currentReturnPercent})</span>
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</Row>
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</Row>
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</Col>
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<Spacer h={8} />
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{user && (
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<button
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className={clsx(
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'btn flex-1',
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betDisabled
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? 'btn-disabled'
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: betChoice === 'YES'
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? 'btn-primary'
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: 'border-none bg-red-400 hover:bg-red-500',
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isSubmitting ? 'loading' : ''
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)}
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onClick={betDisabled ? undefined : submitBet}
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>
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{isSubmitting ? 'Submitting...' : 'Submit Buy'}
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</button>
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)}
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{wasSubmitted && <div className="mt-4">Buy submitted!</div>}
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</>
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)
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}
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function SellPanel(props: {
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contract: FullContract<CPMM, Binary>
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userBets: Bet[]
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shares: number
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sharesOutcome: 'YES' | 'NO'
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user: User
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onSellSuccess?: () => void
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}) {
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const { contract, shares, sharesOutcome, userBets, user, onSellSuccess } =
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props
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const [amount, setAmount] = useState<number | undefined>(Math.floor(shares))
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const [error, setError] = useState<string | undefined>()
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const [isSubmitting, setIsSubmitting] = useState(false)
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const [wasSubmitted, setWasSubmitted] = useState(false)
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const betDisabled = isSubmitting || !amount || error
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async function submitSell() {
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if (!user || !amount) return
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setError(undefined)
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setIsSubmitting(true)
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const result = await placeBet({
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shares: amount,
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outcome: sharesOutcome,
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contractId: contract.id,
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}).then((r) => r.data as any)
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console.log('placed bet. Result:', result)
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if (result?.status === 'success') {
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setIsSubmitting(false)
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setWasSubmitted(true)
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setAmount(undefined)
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if (onSellSuccess) onSellSuccess()
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} else {
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setError(result?.error || 'Error selling')
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setIsSubmitting(false)
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}
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}
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const initialProb = getProbability(contract)
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const { newPool } = calculateCpmmSale(contract, {
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shares: amount ?? 0,
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outcome: sharesOutcome,
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} as Bet)
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const resultProb = getCpmmProbability(newPool, contract.p)
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return (
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<>
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<SellAmountInput
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inputClassName="w-full"
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contract={contract}
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amount={amount}
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onChange={setAmount}
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userBets={userBets}
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error={error}
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setError={setError}
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disabled={isSubmitting}
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/>
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<Col className="mt-3 w-full gap-3">
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<Row className="items-center justify-between text-sm">
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<div className="text-gray-500">Probability</div>
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<Row>
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<div>{formatPercent(initialProb)}</div>
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<div className="mx-2">→</div>
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<div>{formatPercent(resultProb)}</div>
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</Row>
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</Row>
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</Col>
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<Spacer h={8} />
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<button
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className={clsx(
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'btn flex-1',
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betDisabled
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? 'btn-disabled'
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: sharesOutcome === 'YES'
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? 'btn-primary'
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: 'border-none bg-red-400 hover:bg-red-500',
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isSubmitting ? 'loading' : ''
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)}
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onClick={betDisabled ? undefined : submitSell}
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>
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{isSubmitting ? 'Submitting...' : 'Submit sell'}
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</button>
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{wasSubmitted && <div className="mt-4">Sell submitted!</div>}
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</>
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)
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}
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