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const {
addCurrencies,
conversionUtil,
conversionGTE,
multiplyCurrencies,
conversionGreaterThan,
} = require('../../conversion-util')
const {
calcTokenAmount,
} = require('../../token-util')
const {
INSUFFICIENT_FUNDS_ERROR,
INSUFFICIENT_TOKENS_ERROR,
NEGATIVE_ETH_ERROR,
} = require('./send.constants')
const abi = require('ethereumjs-abi')
module.exports = {
calcGasTotal,
doesAmountErrorRequireUpdate,
generateTokenTransferData,
getAmountErrorObject,
getParamsForGasEstimate,
calcTokenBalance,
isBalanceSufficient,
isTokenBalanceSufficient,
}
function calcGasTotal (gasLimit, gasPrice) {
return multiplyCurrencies(gasLimit, gasPrice, {
toNumericBase: 'hex',
multiplicandBase: 16,
multiplierBase: 16,
})
}
function isBalanceSufficient ({
amount = '0x0',
amountConversionRate = 0,
balance,
conversionRate,
gasTotal = '0x0',
primaryCurrency,
}) {
const totalAmount = addCurrencies(amount, gasTotal, {
aBase: 16,
bBase: 16,
toNumericBase: 'hex',
})
const balanceIsSufficient = conversionGTE(
{
value: balance,
fromNumericBase: 'hex',
fromCurrency: primaryCurrency,
conversionRate,
},
{
value: totalAmount,
fromNumericBase: 'hex',
conversionRate: Number(amountConversionRate) || conversionRate,
fromCurrency: primaryCurrency,
},
)
return balanceIsSufficient
}
function isTokenBalanceSufficient ({
amount = '0x0',
tokenBalance,
decimals,
}) {
const amountInDec = conversionUtil(amount, {
fromNumericBase: 'hex',
})
const tokenBalanceIsSufficient = conversionGTE(
{
value: tokenBalance,
fromNumericBase: 'dec',
},
{
value: calcTokenAmount(amountInDec, decimals),
fromNumericBase: 'dec',
},
)
return tokenBalanceIsSufficient
}
function getAmountErrorObject ({
amount,
amountConversionRate,
balance,
conversionRate,
gasTotal,
primaryCurrency,
selectedToken,
tokenBalance,
}) {
let insufficientFunds = false
if (gasTotal && conversionRate) {
insufficientFunds = !isBalanceSufficient({
amount: selectedToken ? '0x0' : amount,
amountConversionRate,
balance,
conversionRate,
gasTotal,
primaryCurrency,
})
}
let inSufficientTokens = false
if (selectedToken && tokenBalance !== null) {
const { decimals } = selectedToken
inSufficientTokens = !isTokenBalanceSufficient({
tokenBalance,
amount,
decimals,
})
}
const amountLessThanZero = conversionGreaterThan(
{ value: 0, fromNumericBase: 'dec' },
{ value: amount, fromNumericBase: 'hex' },
)
let amountError = null
if (insufficientFunds) {
amountError = INSUFFICIENT_FUNDS_ERROR
} else if (inSufficientTokens) {
amountError = INSUFFICIENT_TOKENS_ERROR
} else if (amountLessThanZero) {
amountError = NEGATIVE_ETH_ERROR
}
return { amount: amountError }
}
function getParamsForGasEstimate (selectedAddress, symbol, data) {
const estimatedGasParams = {
from: selectedAddress,
gas: '746a528800',
}
if (symbol) {
Object.assign(estimatedGasParams, { value: '0x0' })
}
if (data) {
Object.assign(estimatedGasParams, { data })
}
return estimatedGasParams
}
function calcTokenBalance ({ selectedToken, usersToken }) {
const { decimals } = selectedToken || {}
return calcTokenAmount(usersToken.balance.toString(), decimals) + ''
}
function doesAmountErrorRequireUpdate ({
balance,
gasTotal,
prevBalance,
prevGasTotal,
prevTokenBalance,
selectedToken,
tokenBalance,
}) {
const balanceHasChanged = balance !== prevBalance
const gasTotalHasChange = gasTotal !== prevGasTotal
const tokenBalanceHasChanged = selectedToken && tokenBalance !== prevTokenBalance
const amountErrorRequiresUpdate = balanceHasChanged || gasTotalHasChange || tokenBalanceHasChanged
return amountErrorRequiresUpdate
}
function generateTokenTransferData (selectedAddress, selectedToken) {
if (!selectedToken) return
console.log(`abi.rawEncode`, abi.rawEncode)
return Array.prototype.map.call(
abi.rawEncode(['address', 'uint256'], [selectedAddress, '0x0']),
x => ('00' + x.toString(16)).slice(-2)
).join('')
}
|
