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20 lines
704 B
TypeScript
20 lines
704 B
TypeScript
import { calculateDecay } from '@/graphql/util/decay'
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import { getLastTransaction } from '@/graphql/util/getLastTransaction'
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import { Decimal } from 'decimal.js-light'
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import { Decay } from '../model/Decay'
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export async function calculateRecipientBalance(
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userId: number,
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amount: Decimal,
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time: Date,
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): Promise<{ balance: Decimal; decay: Decay; lastTransactionId: number } | null> {
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const lastTransaction = await getLastTransaction(userId)
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if (!lastTransaction) return null
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const decay = calculateDecay(lastTransaction.balance, lastTransaction.balanceDate, time)
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const balance = decay.balance.add(amount.toString())
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return { balance, lastTransactionId: lastTransaction.id, decay }
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}
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