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change fee structure

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This commit is contained in:
mantikoros 2022-02-03 16:59:59 -06:00
parent 6c9f566d3d
commit 4294481b5b
6 changed files with 17 additions and 16 deletions
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6
common/calculate.ts
View File

@ -104,7 +104,7 @@ export function calculateShareValue(contract: Contract, bet: Bet) {
}
export function calculateSaleAmount(contract: Contract, bet: Bet) {
return (1 - 2 * FEES) * calculateShareValue(contract, bet)
return (1 - FEES) * calculateShareValue(contract, bet)
}
export function calculatePayout(
@ -145,7 +145,7 @@ export function calculateStandardPayout(
totalShares[outcome] - phantomShares[outcome] - totalBets[outcome]
const winningsPool = truePool - totalBets[outcome]
return amount + (1 - 2 * FEES) * ((shares - amount) / total) * winningsPool
return amount + (1 - FEES) * ((shares - amount) / total) * winningsPool
}
export function calculatePayoutAfterCorrectBet(contract: Contract, bet: Bet) {
@ -204,7 +204,7 @@ function calculateMktPayout(contract: Contract, bet: Bet) {
return (
betP * bet.amount +
(1 - 2 * FEES) *
(1 - FEES) *
((betP * (bet.shares - bet.amount)) / weightedShareTotal) *
winningsPool
)

4
common/fees.ts
View File

@ -1,4 +1,4 @@
export const PLATFORM_FEE = 0.01 // == 1%
export const CREATOR_FEE = 0.01
export const PLATFORM_FEE = 0.01
export const CREATOR_FEE = 0.09
export const FEES = PLATFORM_FEE + CREATOR_FEE

10
common/payouts.ts
View File

@ -38,12 +38,12 @@ export const getStandardPayouts = (
userId: bet.userId,
payout:
bet.amount +
(1 - 2 * FEES) *
(1 - FEES) *
((bet.shares - bet.amount) / shareDifferenceSum) *
winningsPool,
}))
const creatorPayout = 2 * CREATOR_FEE * winningsPool
const creatorPayout = CREATOR_FEE * winningsPool
console.log(
'resolved',
@ -98,7 +98,7 @@ export const getMktPayouts = (
userId: bet.userId,
payout:
p * bet.amount +
(1 - 2 * FEES) *
(1 - FEES) *
((p * (bet.shares - bet.amount)) / weightedShareTotal) *
winningsPool,
}))
@ -107,12 +107,12 @@ export const getMktPayouts = (
userId: bet.userId,
payout:
(1 - p) * bet.amount +
(1 - 2 * FEES) *
(1 - FEES) *
(((1 - p) * (bet.shares - bet.amount)) / weightedShareTotal) *
winningsPool,
}))
const creatorPayout = 2 * CREATOR_FEE * winningsPool
const creatorPayout = CREATOR_FEE * winningsPool
return [
...yesPayouts,

4
common/sell-bet.ts
View File

@ -36,8 +36,8 @@ export const getSellBetInfo = (
const probBefore = getProbability(contract.totalShares)
const probAfter = getProbability(newTotalShares)
const creatorFee = 2 * CREATOR_FEE * adjShareValue
const saleAmount = (1 - 2 * FEES) * adjShareValue
const creatorFee = CREATOR_FEE * adjShareValue
const saleAmount = (1 - FEES) * adjShareValue
console.log(
'SELL M$',

7
web/pages/about.tsx
View File

@ -1,7 +1,7 @@
import { cloneElement } from 'react'
import { CREATOR_FEE } from '../../common/fees'
import { Page } from '../components/page'
import { SEO } from '../components/SEO'
import { useContracts } from '../hooks/use-contracts'
import styles from './about.module.css'
export default function About() {
@ -132,8 +132,9 @@ function Contents() {
</p>
<h3 id="how-are-markets-resolved-">How are markets resolved?</h3>
<p>
The creator of the prediction market decides the outcome and earns 1% of
the betting pool for their effort.
The creator of the prediction market decides the outcome and earns{' '}
{CREATOR_FEE * 100}% of the winnings as a commission for creating and
resolving the market.
</p>
<p>
This simple resolution mechanism has surprising benefits in allowing a

2
web/pages/create.tsx
View File

@ -177,7 +177,7 @@ export function NewContract(props: { question: string; tag?: string }) {
<span>Market ante</span>
<InfoTooltip
text={`Subsidize your market to encourage trading. Ante bets are set to match your initial probability.
You earn ${CREATOR_FEE * 100}% of trading volume.`}
You earn ${CREATOR_FEE * 100}% of the winnings.`}
/>
</label>
<AmountInput