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const Component = require('react').Component
const h = require('react-hyperscript')
const inherits = require('util').inherits
const ethUtil = require('ethereumjs-util')
const BN = ethUtil.BN
module.exports = HexAsDecimalInput
inherits(HexAsDecimalInput, Component)
function HexAsDecimalInput () {
Component.call(this)
}
/* Hex as Decimal Input
*
* A component for allowing easy, decimal editing
* of a passed in hex string value.
*
* On change, calls back its `onChange` function parameter
* and passes it an updated hex string.
*/
HexAsDecimalInput.prototype.render = function () {
const props = this.props
const { value, onChange } = props
const decimalValue = decimalize(value)
return (
h('input', {
style: {
display: 'block',
textAlign: 'right',
},
value: decimalValue,
onChange: (event) => {
const hexString = hexify(event.target.value)
onChange(hexString)
},
})
)
}
function hexify (decimalString) {
const hexBN = new BN(decimalString, 10)
return '0x' + hexBN.toString('hex')
}
function decimalize (input) {
const strippedInput = ethUtil.stripHexPrefix(input)
const inputBN = new BN(strippedInput, 'hex')
return inputBN.toString(10)
}
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