8b7cd20b6f
* Remove some old loan code * Almost complete implementation of updateLoans cloud function * Merge fixes * Use invested instead of sale value, check if eligible, perform payouts * Run monday 12am * Implement loan income notification * Fix imports * Loan update fixes / debug * Handle NaN and negative loan calcs * Working loan notification * Loan modal! * Move loans calculation to /common * Better layout * Pay back loan on sell shares * Pay back fraction of loan on redeem * Sell bet loan: negate buy bet's loan * Modal tweaks * Compute and store nextLoanCached for all users * lint * Update loans with newest portfolio * Filter loans to only unresolved contracts * Tweak spacing * Increase memory
56 lines
1.6 KiB
TypeScript
56 lines
1.6 KiB
TypeScript
import { partition, sumBy } from 'lodash'
|
|
|
|
import { Bet } from './bet'
|
|
import { getProbability } from './calculate'
|
|
import { CPMMContract } from './contract'
|
|
import { noFees } from './fees'
|
|
import { CandidateBet } from './new-bet'
|
|
|
|
type RedeemableBet = Pick<Bet, 'outcome' | 'shares' | 'loanAmount'>
|
|
|
|
export const getRedeemableAmount = (bets: RedeemableBet[]) => {
|
|
const [yesBets, noBets] = partition(bets, (b) => b.outcome === 'YES')
|
|
const yesShares = sumBy(yesBets, (b) => b.shares)
|
|
const noShares = sumBy(noBets, (b) => b.shares)
|
|
const shares = Math.max(Math.min(yesShares, noShares), 0)
|
|
const soldFrac = shares > 0 ? Math.min(yesShares, noShares) / shares : 0
|
|
const loanAmount = sumBy(bets, (bet) => bet.loanAmount ?? 0)
|
|
const loanPayment = loanAmount * soldFrac
|
|
const netAmount = shares - loanPayment
|
|
return { shares, loanPayment, netAmount }
|
|
}
|
|
|
|
export const getRedemptionBets = (
|
|
shares: number,
|
|
loanPayment: number,
|
|
contract: CPMMContract
|
|
) => {
|
|
const p = getProbability(contract)
|
|
const createdTime = Date.now()
|
|
const yesBet: CandidateBet = {
|
|
contractId: contract.id,
|
|
amount: p * -shares,
|
|
shares: -shares,
|
|
loanAmount: loanPayment ? -loanPayment / 2 : 0,
|
|
outcome: 'YES',
|
|
probBefore: p,
|
|
probAfter: p,
|
|
createdTime,
|
|
isRedemption: true,
|
|
fees: noFees,
|
|
}
|
|
const noBet: CandidateBet = {
|
|
contractId: contract.id,
|
|
amount: (1 - p) * -shares,
|
|
shares: -shares,
|
|
loanAmount: loanPayment ? -loanPayment / 2 : 0,
|
|
outcome: 'NO',
|
|
probBefore: p,
|
|
probAfter: p,
|
|
createdTime,
|
|
isRedemption: true,
|
|
fees: noFees,
|
|
}
|
|
return [yesBet, noBet]
|
|
}
|