mirror of
https://github.com/kremalicious/metamask-extension.git
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4c87c05a02
* Fix rounding issue when sending max tokens * Ensure amount row shows exact amount of max tokens on send screen (#2) * Fix tests * Change stored redux value from BigNumber to hex string. Fix TokenInput default value
30 lines
669 B
JavaScript
30 lines
669 B
JavaScript
const {
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multiplyCurrencies,
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subtractCurrencies,
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} = require('../../../../../conversion-util')
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const ethUtil = require('ethereumjs-util')
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function calcMaxAmount ({ balance, gasTotal, selectedToken, tokenBalance }) {
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const { decimals } = selectedToken || {}
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const multiplier = Math.pow(10, Number(decimals || 0))
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return selectedToken
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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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module.exports = {
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calcMaxAmount,
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}
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