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22 lines
624 B
22 lines
624 B
import { multiplyCurrencies, subtractCurrencies } from '../../../../../helpers/utils/conversion-util'
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import ethUtil from 'ethereumjs-util'
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export function calcMaxAmount ({ balance, gasTotal, sendToken, tokenBalance }) {
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const { decimals } = sendToken || {}
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const multiplier = Math.pow(10, Number(decimals || 0))
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return sendToken
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? multiplyCurrencies(
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tokenBalance,
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multiplier,
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{
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toNumericBase: 'hex',
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multiplicandBase: 16,
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}
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)
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: subtractCurrencies(
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ethUtil.addHexPrefix(balance),
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ethUtil.addHexPrefix(gasTotal),
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{ toNumericBase: 'hex' }
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)
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}
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