18 lines
568 B
TypeScript
18 lines
568 B
TypeScript
import BN from 'bn.js'
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import { MintAccount, TokenAccount } from './tokens'
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function fixedPointToNumber(value: BN, decimals: number) {
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const divisor = new BN(10).pow(new BN(decimals))
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const quotient = value.div(divisor)
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const remainder = value.mod(divisor)
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return quotient.toNumber() + remainder.toNumber() / divisor.toNumber()
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}
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export function calculateBalance(
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mints: { [pk: string]: MintAccount },
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account: TokenAccount
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): number {
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const mint = mints[account.mint.toBase58()]
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return mint ? fixedPointToNumber(account.amount, mint.decimals) : 0
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}
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