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Merge pull request #2818 from MetaMask/i2782-ethroundingerror
Fix rounding error in ether input on send screen
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commit
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@ -4,6 +4,7 @@
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- Fix bug that prevented updating custom token details.
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- No longer mark long-pending transactions as failed, since we now have button to retry with higher gas.
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- Fix rounding error when specifying an ether amount that has too much precision.
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## 3.13.3 2017-12-14
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@ -201,6 +201,18 @@ describe('util', function () {
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var output = util.normalizeEthStringToWei(input)
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assert.equal(output.toString(10), ethInWei)
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})
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it('should account for overflow numbers gracefully by dropping extra precision.', function () {
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var input = '1.11111111111111111111'
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var output = util.normalizeEthStringToWei(input)
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assert.equal(output.toString(10), '1111111111111111111')
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})
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it('should not truncate very exact wei values that do not have extra precision.', function () {
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var input = '1.100000000000000001'
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var output = util.normalizeEthStringToWei(input)
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assert.equal(output.toString(10), '1100000000000000001')
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})
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})
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describe('#normalizeNumberToWei', function () {
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@ -247,10 +247,26 @@ SendTransactionScreen.prototype.onSubmit = function () {
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const recipient = state.recipient || document.querySelector('input[name="address"]').value.replace(/^[.\s]+|[.\s]+$/g, '')
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const nickname = state.nickname || ' '
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const input = document.querySelector('input[name="amount"]').value
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const parts = input.split('')
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let message
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if (isNaN(input) || input === '') {
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message = 'Invalid ether value.'
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return this.props.dispatch(actions.displayWarning(message))
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}
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if (parts[1]) {
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var decimal = parts[1]
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if (decimal.length > 18) {
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message = 'Ether amount is too precise.'
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return this.props.dispatch(actions.displayWarning(message))
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}
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}
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const value = util.normalizeEthStringToWei(input)
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const txData = document.querySelector('input[name="txData"]').value
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const balance = this.props.balance
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let message
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if (value.gt(balance)) {
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message = 'Insufficient funds.'
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@ -193,6 +193,9 @@ function normalizeEthStringToWei (str) {
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while (decimal.length < 18) {
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decimal += '0'
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}
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if (decimal.length > 18) {
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decimal = decimal.slice(0, 18)
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}
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const decimalBN = new ethUtil.BN(decimal, 10)
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eth = eth.add(decimalBN)
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}
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