2022-03-03 05:01:39 +00:00
|
|
|
import { Bet } from './bet'
|
|
|
|
import {
|
|
|
|
calculateCpmmShares,
|
|
|
|
getCpmmProbability,
|
|
|
|
getCpmmProbabilityAfterBet,
|
2022-03-03 05:32:33 +00:00
|
|
|
getCpmmProbabilityAfterSale,
|
2022-03-03 05:01:39 +00:00
|
|
|
} from './calculate-cpmm'
|
|
|
|
import {
|
|
|
|
calculateDpmPayoutAfterCorrectBet,
|
|
|
|
calculateDpmShares,
|
|
|
|
getDpmOutcomeProbability,
|
|
|
|
getDpmProbability,
|
|
|
|
getDpmProbabilityAfterBet,
|
2022-03-03 05:32:33 +00:00
|
|
|
getDpmProbabilityAfterSale,
|
2022-03-03 05:01:39 +00:00
|
|
|
} from './calculate-dpm'
|
|
|
|
import { Binary, Contract, CPMM, DPM, FullContract } from './contract'
|
|
|
|
import { FEES } from './fees'
|
|
|
|
|
|
|
|
export function getProbability(contract: FullContract<DPM | CPMM, Binary>) {
|
|
|
|
return contract.mechanism === 'cpmm-1'
|
|
|
|
? getCpmmProbability(contract.pool)
|
|
|
|
: getDpmProbability(contract.totalShares)
|
|
|
|
}
|
|
|
|
|
2022-03-03 05:32:33 +00:00
|
|
|
export function getInitialProbability(
|
|
|
|
contract: FullContract<DPM | CPMM, Binary>
|
|
|
|
) {
|
|
|
|
return contract.mechanism === 'cpmm-1'
|
|
|
|
? getCpmmProbability(contract.liquidity[contract.creatorId])
|
|
|
|
: getDpmProbability(contract.phantomShares ?? contract.totalShares)
|
|
|
|
}
|
|
|
|
|
2022-03-03 05:01:39 +00:00
|
|
|
export function getOutcomeProbability(contract: Contract, outcome: string) {
|
|
|
|
return contract.mechanism === 'cpmm-1'
|
|
|
|
? getCpmmProbability(contract.pool)
|
|
|
|
: getDpmOutcomeProbability(contract.totalShares, outcome)
|
|
|
|
}
|
|
|
|
|
|
|
|
export function getProbabilityAfterBet(
|
|
|
|
contract: Contract,
|
|
|
|
outcome: string,
|
|
|
|
bet: number
|
|
|
|
) {
|
|
|
|
return contract.mechanism === 'cpmm-1'
|
|
|
|
? getCpmmProbabilityAfterBet(
|
|
|
|
contract as FullContract<CPMM, Binary>,
|
|
|
|
outcome,
|
|
|
|
bet
|
|
|
|
)
|
|
|
|
: getDpmProbabilityAfterBet(contract.totalShares, outcome, bet)
|
|
|
|
}
|
|
|
|
|
|
|
|
export function calculateShares(
|
|
|
|
contract: Contract,
|
|
|
|
bet: number,
|
|
|
|
betChoice: string
|
|
|
|
) {
|
|
|
|
return contract.mechanism === 'cpmm-1'
|
|
|
|
? calculateCpmmShares(contract.pool, contract.k, bet, betChoice)
|
|
|
|
: calculateDpmShares(contract.totalShares, bet, betChoice)
|
|
|
|
}
|
|
|
|
|
|
|
|
export function calculatePayoutAfterCorrectBet(contract: Contract, bet: Bet) {
|
|
|
|
return contract.mechanism === 'cpmm-1'
|
|
|
|
? deductFees(bet.amount, bet.shares)
|
|
|
|
: calculateDpmPayoutAfterCorrectBet(contract, bet)
|
|
|
|
}
|
|
|
|
|
2022-03-03 05:32:33 +00:00
|
|
|
export function getProbabilityAfterSale(
|
|
|
|
contract: Contract,
|
|
|
|
outcome: string,
|
|
|
|
shares: number
|
|
|
|
) {
|
|
|
|
return contract.mechanism === 'cpmm-1'
|
|
|
|
? getCpmmProbabilityAfterSale(
|
|
|
|
contract as FullContract<CPMM, Binary>,
|
|
|
|
{ shares, outcome } as Bet
|
|
|
|
)
|
|
|
|
: getDpmProbabilityAfterSale(contract.totalShares, outcome, shares)
|
|
|
|
}
|
|
|
|
|
2022-03-03 05:01:39 +00:00
|
|
|
export const deductFees = (betAmount: number, winnings: number) => {
|
|
|
|
return winnings > betAmount
|
|
|
|
? betAmount + (1 - FEES) * (winnings - betAmount)
|
|
|
|
: winnings
|
|
|
|
}
|