TornadoCash/classic-relayer
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Add refund support

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This commit is contained in:
poma 2019-10-06 10:54:48 +03:00
parent 3f4ae6be43
commit 45414ae010
1 changed files with 7 additions and 2 deletions
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9
index.js
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@ -61,15 +61,19 @@ app.post('/relay', async (req, resp) => {
}
const fee = toBN(publicSignals[4])
const refund = toBN(publicSignals[5])
const expense = toBN(toWei(gasPrices.fast.toString(), 'gwei')).mul(toBN('1000000'))
let desiredFee
switch (currency) {
case 'eth': {
if (refund !== 0) {
return resp.status(400).json({ error: 'Cannot send refund for eth currency.' })
}
desiredFee = expense
break
}
case 'dai': {
desiredFee = expense.mul(toBN(ethPriceInDai)).div(toBN(10 ** 18))
desiredFee = expense.add(refund).mul(toBN(ethPriceInDai)).div(toBN(10 ** 18))
break
}
}
@ -91,8 +95,9 @@ app.post('/relay', async (req, resp) => {
if (!isKnownRoot) {
return resp.status(400).json({ error: 'The merkle root is too old or invalid.' })
}
const gas = await mixer.methods.withdraw(pi_a, pi_b, pi_c, publicSignals).estimateGas()
const gas = await mixer.methods.withdraw(pi_a, pi_b, pi_c, publicSignals).estimateGas({ value: refund })
const result = mixer.methods.withdraw(pi_a, pi_b, pi_c, publicSignals).send({
value: refund,
gas: numberToHex(gas + 50000),
gasPrice: toHex(toWei(gasPrices.fast.toString(), 'gwei')),
// TODO: nonce