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const {
multiplyCurrencies,
subtractCurrencies,
} = require('../../../../conversion-util')
const ethUtil = require('ethereumjs-util')
function calcMaxAmount ({ balance, gasTotal, selectedToken, tokenBalance }) {
const { decimals } = selectedToken || {}
const multiplier = Math.pow(10, Number(decimals || 0))
return selectedToken
? multiplyCurrencies(tokenBalance, multiplier, {toNumericBase: 'hex'})
: subtractCurrencies(
ethUtil.addHexPrefix(balance),
ethUtil.addHexPrefix(gasTotal),
{ toNumericBase: 'hex' }
)
}
module.exports = {
calcMaxAmount,
}
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