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author | Dan <danjm.com@gmail.com> | 2018-04-11 22:21:54 +0800 |
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committer | Dan <danjm.com@gmail.com> | 2018-04-11 22:21:54 +0800 |
commit | 59c887301aba5d746d669441ec78ef7ec5de3146 (patch) | |
tree | 3236b2e9acbcf45358ecaaf0e291a1a9505729b1 /ui/app/components/send_/send-content/send-amount-row/amount-max-button/amount-max-button.utils.js | |
parent | f4d8da927734b2dcd597d1cc833f9fe6ac59cc77 (diff) | |
download | tangerine-wallet-browser-59c887301aba5d746d669441ec78ef7ec5de3146.tar.gz tangerine-wallet-browser-59c887301aba5d746d669441ec78ef7ec5de3146.tar.zst tangerine-wallet-browser-59c887301aba5d746d669441ec78ef7ec5de3146.zip |
second commit
Diffstat (limited to 'ui/app/components/send_/send-content/send-amount-row/amount-max-button/amount-max-button.utils.js')
-rw-r--r-- | ui/app/components/send_/send-content/send-amount-row/amount-max-button/amount-max-button.utils.js | 22 |
1 files changed, 22 insertions, 0 deletions
diff --git a/ui/app/components/send_/send-content/send-amount-row/amount-max-button/amount-max-button.utils.js b/ui/app/components/send_/send-content/send-amount-row/amount-max-button/amount-max-button.utils.js index e69de29bb..54aacc8d7 100644 --- a/ui/app/components/send_/send-content/send-amount-row/amount-max-button/amount-max-button.utils.js +++ b/ui/app/components/send_/send-content/send-amount-row/amount-max-button/amount-max-button.utils.js @@ -0,0 +1,22 @@ +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 +} |