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author | kumavis <aaron@kumavis.me> | 2018-06-08 01:07:36 +0800 |
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committer | kumavis <aaron@kumavis.me> | 2018-06-08 01:07:36 +0800 |
commit | 66b703b1a4ba25ddaf8278f020967b4d20351027 (patch) | |
tree | 41520dbc3ad35b3c9968cfc390ecb99db5456a33 /ui/app/components/send_/send-content/send-amount-row/amount-max-button/amount-max-button.utils.js | |
parent | 2198276bd533bec767cad954ef8b21c47c0f8c09 (diff) | |
parent | 988283778a2be52640b27a359ef3fb1130e95711 (diff) | |
download | tangerine-wallet-browser-66b703b1a4ba25ddaf8278f020967b4d20351027.tar.gz tangerine-wallet-browser-66b703b1a4ba25ddaf8278f020967b4d20351027.tar.zst tangerine-wallet-browser-66b703b1a4ba25ddaf8278f020967b4d20351027.zip |
Merge branch 'develop' of github.com:MetaMask/metamask-extension into network-remove-provider-engine
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 new file mode 100644 index 000000000..b490a7fd7 --- /dev/null +++ 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, +} |