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Update server.ts

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This commit is contained in:
Parsa Yazdani 2024-07-04 19:38:01 +10:00
parent 3595fb3604
commit c3e0da83ec
1 changed files with 13 additions and 7 deletions
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20
Server/src/server.ts
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@ -9,13 +9,21 @@ function countLiquidity (sharesHeld: number[]): number {
return sharesHeld.reduce((acc, val) => acc + val, 0)
}
function calculateMarginalPrice (team: number, sharesHeld: number[]): number {
function calculateOdds (sharesHeld: number[]): number[] {
const liquidity = countLiquidity(sharesHeld)
const exps = sharesHeld.map(shares => Math.exp(shares / liquidity))
const sumExp = exps.reduce((acc, val) => acc + val, 0)
return exps[team] / sumExp
return exps
}
// function calculateMarginalPrice (team: number, sharesHeld: number[]): number {
// const liquidity = countLiquidity(sharesHeld)
// console.log('Liquidity:', sharesHeld)
// const exps = sharesHeld.map(shares => Math.exp(shares / liquidity))
// console.log('Exps:', exps)
// const sumExp = exps.reduce((acc, val) => acc + val, 0)
// return exps[team] / sumExp
// }
function countBets (userShares: UserShare[]): number[] {
return Object.values(userShares.reduce((acc, curr) => {
const index = Object.keys(acc).length
@ -56,7 +64,7 @@ function placeBet (userShares: UserShare[], userId: number, team: number, shares
const transactionCost = calculateCost(countBets(userShares)) - initialCost
if (transactionCost > userBalances[userId]) {
if (transactionCost > userBalances[userId] && userBalances[userId] !== undefined && userBalances[userId] !== null) {
console.log('Not enough balance')
return userShares
}
@ -100,9 +108,7 @@ app.get('/bets', (req, res) => {
userShares = placeBet(userShares, userId, team, sharesBought)
const bets = countBets(userShares)
const odds: number[] = bets.map((_, i) => {
return calculateMarginalPrice(i, bets).toFixed(4) as unknown as number
})
const odds: number[] = calculateOdds(bets)
const liquidity = countLiquidity(bets)