116 lines
2.7 KiB
TypeScript
116 lines
2.7 KiB
TypeScript
import { PHANTOM_ANTE } from './antes'
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import {
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Binary,
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Contract,
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CPMM,
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DPM,
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FreeResponse,
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outcomeType,
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} from './contract'
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import { User } from './user'
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import { parseTags } from './util/parse'
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import { removeUndefinedProps } from './util/object'
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import { calcCpmmInitialPool } from './calculate-cpmm'
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import { calcDpmInitialPool } from './calculate-dpm'
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export function getNewContract(
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id: string,
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slug: string,
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creator: User,
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question: string,
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outcomeType: outcomeType,
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description: string,
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initialProb: number,
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ante: number,
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closeTime: number,
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extraTags: string[]
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) {
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const tags = parseTags(
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`${question} ${description} ${extraTags.map((tag) => `#${tag}`).join(' ')}`
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)
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const lowercaseTags = tags.map((tag) => tag.toLowerCase())
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const propsByOutcomeType =
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outcomeType === 'BINARY'
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? getBinaryCpmmProps(initialProb, ante) // getBinaryDpmProps(initialProb, ante)
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: getFreeAnswerProps(ante)
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const contract = removeUndefinedProps({
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id,
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slug,
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...propsByOutcomeType,
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creatorId: creator.id,
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creatorName: creator.name,
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creatorUsername: creator.username,
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creatorAvatarUrl: creator.avatarUrl,
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question: question.trim(),
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description: description.trim(),
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tags,
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lowercaseTags,
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visibility: 'public',
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isResolved: false,
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createdTime: Date.now(),
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lastUpdatedTime: Date.now(),
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closeTime,
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volume24Hours: 0,
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volume7Days: 0,
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})
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return contract as Contract
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}
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const getBinaryDpmProps = (initialProb: number, ante: number) => {
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const { sharesYes, sharesNo, poolYes, poolNo, phantomYes, phantomNo } =
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calcDpmInitialPool(initialProb, ante, PHANTOM_ANTE)
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const system: DPM & Binary = {
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mechanism: 'dpm-2',
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outcomeType: 'BINARY',
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initialProbability: initialProb / 100,
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phantomShares: { YES: phantomYes, NO: phantomNo },
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pool: { YES: poolYes, NO: poolNo },
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totalShares: { YES: sharesYes, NO: sharesNo },
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totalBets: { YES: poolYes, NO: poolNo },
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}
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return system
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}
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const getBinaryCpmmProps = (initialProb: number, ante: number) => {
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const { poolYes, poolNo } = calcCpmmInitialPool(initialProb, ante)
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const pool = { YES: poolYes, NO: poolNo }
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const system: CPMM & Binary = {
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mechanism: 'cpmm-1',
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outcomeType: 'BINARY',
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initialProbability: initialProb / 100,
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pool: pool,
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}
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return system
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}
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const getFreeAnswerProps = (ante: number) => {
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const system: DPM & FreeResponse = {
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mechanism: 'dpm-2',
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outcomeType: 'FREE_RESPONSE',
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pool: { '0': ante },
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totalShares: { '0': ante },
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totalBets: { '0': ante },
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answers: [],
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}
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return system
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}
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const getMultiProps = (
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outcomes: string[],
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initialProbs: number[],
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ante: number
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) => {
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// Not implemented.
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}
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