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service fee handling

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This commit is contained in:
Alexey 2019-11-26 18:01:37 +03:00
parent ab088a0855
commit 1edc8ff69c
5 changed files with 24 additions and 15 deletions
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13
src/utils.js
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@ -1,5 +1,5 @@
const { isHexStrict, toBN, toWei } = require('web3-utils')
const { mixers } = require('../config')
const { mixers, relayerServiceFee } = require('../config')
function isValidProof(proof) {
// validator expects `websnarkUtils.toSolidityInput(proof)` output
@ -46,7 +46,7 @@ function isValidArgs(args) {
function isKnownContract(contract) {
for (let i = 0; i < mixers.length; i++) {
if (mixers[i].address === contract) {
return { valid: true, currency: mixers[i].currency }
return { valid: true, currency: mixers[i].currency, amount: mixers[i].amount }
}
}
return { valid: false }
@ -56,12 +56,14 @@ function sleep(ms) {
return new Promise(resolve => setTimeout(resolve, ms))
}
function isEnoughFee({ gas, gasPrices, currency, refund, ethPrices, fee }) {
function isEnoughFee({ gas, gasPrices, currency, amount, refund, ethPrices, fee }) {
// TODO tokens can have less then 18 decimals
const feePercent = toBN(toWei(amount)).mul(toBN(relayerServiceFee)).div(toBN('1000'))
const expense = toBN(toWei(gasPrices.fast.toString(), 'gwei')).mul(toBN(gas))
let desiredFee
switch (currency) {
case 'eth': {
desiredFee = expense
desiredFee = expense.add(feePercent)
break
}
case 'dai': {
@ -69,10 +71,11 @@ function isEnoughFee({ gas, gasPrices, currency, refund, ethPrices, fee }) {
expense.add(refund)
.mul(toBN(10 ** 18))
.div(toBN(ethPrices.dai))
desiredFee = desiredFee.add(feePercent)
break
}
}
console.log('desired fee', desiredFee.toString())
console.log('desired fee, feePercent', desiredFee.toString(), feePercent.toString())
if (fee.lt(desiredFee)) {
return { isEnough: false, reason: 'Not enough fee' }
}