Merge pull request #26 from tornadocash/revert

Revert

.env.example

@@ -18,4 +18,4 @@ REWARD_ACCOUNT=
 # in GWEI
 MAX_GAS_PRICE=1000
 CONFIRMATIONS=8
-AGGREGATOR=0x9125921ab88429c81d50b6d7e97231cddd181542
+AGGREGATOR=0x466121060aD4dCE1E421027297d7e263236cbfc3

package.json

@@ -29,7 +29,7 @@
     "node-fetch": "^2.6.0",
     "torn-token": "git+ssh://git@github.com/tornadocash/torn-token.git#04c4df88d470ca7503ef5d97882c56cba4f3647d",
     "tornado-cash-anonymity-mining": "git+ssh://git@github.com/tornadocash/tornado-anonymity-mining.git#b13228c20126f212ebbcc5a8493ce2105210739e",
-    "tx-manager": "^0.2.6",
+    "tx-manager": "^0.2.9",
     "uuid": "^8.3.0",
     "web3": "^1.3.0",
     "web3-core-promievent": "^1.3.0",

src/worker.js

@@ -36,6 +36,8 @@ let tree
 let txManager
 let controller
 let swap
+let minerContract
+let proxyContract
 const redis = new Redis(redisUrl)
 const redisSubscribe = new Redis(redisUrl)
 const gasPriceOracle = new GasPriceOracle({ defaultRpc: httpRpcUrl })
@@ -46,6 +48,7 @@ const status = Object.freeze({
   MINED: 'MINED',
   CONFIRMED: 'CONFIRMED',
   FAILED: 'FAILED',
+  RESUBMITTED: 'RESUBMITTED',
 })
 
 async function fetchTree() {
@@ -81,8 +84,14 @@ async function fetchTree() {
 async function start() {
   web3 = new Web3(httpRpcUrl)
   const { CONFIRMATIONS, MAX_GAS_PRICE } = process.env
-  txManager = new TxManager({ privateKey, rpcUrl: httpRpcUrl, config: { CONFIRMATIONS, MAX_GAS_PRICE } })
+  txManager = new TxManager({
+    privateKey,
+    rpcUrl: httpRpcUrl,
+    config: { CONFIRMATIONS, MAX_GAS_PRICE, THROW_ON_REVERT: false },
+  })
   swap = new web3.eth.Contract(swapABI, await resolver.resolve(torn.rewardSwap.address))
+  minerContract = new web3.eth.Contract(miningABI, await resolver.resolve(torn.miningV2.address))
+  proxyContract = new web3.eth.Contract(tornadoProxyABI, await resolver.resolve(torn.tornadoProxy.address))
   redisSubscribe.subscribe('treeUpdate', fetchTree)
   await fetchTree()
   const provingKeys = {
@@ -171,12 +180,11 @@ async function checkMiningFee({ args }) {
   }
 }
 
-async function getTxObject({ data }) {
+function getTxObject({ data }) {
   if (data.type === jobType.TORNADO_WITHDRAW) {
     let contract, calldata
     if (getInstance(data.contract).currency === 'eth') {
-      const tornadoProxyAddress = await resolver.resolve(torn.tornadoProxy.address)
-      contract = new web3.eth.Contract(tornadoProxyABI, tornadoProxyAddress)
+      contract = proxyContract
       calldata = contract.methods.withdraw(data.contract, data.proof, ...data.args).encodeABI()
     } else {
       contract = new web3.eth.Contract(tornadoABI, data.contract)
@@ -188,17 +196,29 @@ async function getTxObject({ data }) {
       data: calldata,
     }
   } else {
-    const minerAddress = await resolver.resolve(torn.miningV2.address)
-    const contract = new web3.eth.Contract(miningABI, minerAddress)
     const method = data.type === jobType.MINING_REWARD ? 'reward' : 'withdraw'
-    const calldata = contract.methods[method](data.proof, data.args).encodeABI()
+    const calldata = minerContract.methods[method](data.proof, data.args).encodeABI()
     return {
-      to: minerAddress,
+      to: minerContract._address,
       data: calldata,
     }
   }
 }
 
+async function isOutdatedTreeRevert(receipt, currentTx) {
+  try {
+    await web3.eth.call(currentTx.tx, receipt.blockNumber)
+    console.log('Simulated call successful')
+    return false
+  } catch (e) {
+    console.log('Decoded revert reason:', e.message)
+    return (
+      e.message.indexOf('Outdated account merkle root') !== -1 ||
+      e.message.indexOf('Outdated tree update merkle root') !== -1
+    )
+  }
+}
+
 async function processJob(job) {
   try {
     if (!jobType[job.data.type]) {
@@ -207,15 +227,24 @@ async function processJob(job) {
     currentJob = job
     await updateStatus(status.ACCEPTED)
     console.log(`Start processing a new ${job.data.type} job #${job.id}`)
+    await submitTx(job)
+  } catch (e) {
+    console.error('processJob', e.message)
+    await updateStatus(status.FAILED)
+    throw e
+  }
+}
+
+async function submitTx(job, retry = 0) {
   await checkFee(job)
-    currentTx = await txManager.createTx(await getTxObject(job))
+  currentTx = await txManager.createTx(getTxObject(job))
 
   if (job.data.type !== jobType.TORNADO_WITHDRAW) {
     await fetchTree()
   }
 
   try {
-      await currentTx
+    const receipt = await currentTx
       .send()
       .on('transactionHash', txHash => {
         updateTxHash(txHash)
@@ -227,15 +256,24 @@ async function processJob(job) {
       })
       .on('confirmations', updateConfirmations)
 
+    if (receipt.status === 1) {
       await updateStatus(status.CONFIRMED)
-    } catch (e) {
-      console.error('Revert', e)
-      throw new Error(`Revert by smart contract ${e.message}`)
+    } else {
+      if (job.data.type !== jobType.TORNADO_WITHDRAW && (await isOutdatedTreeRevert(receipt, currentTx))) {
+        if (retry < 3) {
+          await updateStatus(status.RESUBMITTED)
+          await submitTx(job, retry + 1)
+        } else {
+          throw new Error('Tree update retry limit exceeded')
+        }
+      } else {
+        throw new Error('Submitted transaction failed')
+      }
     }
   } catch (e) {
-    console.error(e)
-    await updateStatus(status.FAILED)
-    throw e
+    // todo this could result in duplicated error logs
+    // todo handle a case where account tree is still not up to date (wait and retry)?
+    throw new Error(`Revert by smart contract ${e.message}`)
   }
 }
 

yarn.lock

@@ -4384,10 +4384,10 @@ tweetnacl@^1.0.0:
   resolved "https://registry.yarnpkg.com/tweetnacl/-/tweetnacl-1.0.3.tgz#ac0af71680458d8a6378d0d0d050ab1407d35596"
   integrity sha512-6rt+RN7aOi1nGMyC4Xa5DdYiukl2UWCbcJft7YhxReBGQD7OAM8Pbxw6YMo4r2diNEA8FEmu32YOn9rhaiE5yw==
 
-tx-manager@^0.2.6:
-  version "0.2.6"
-  resolved "https://registry.yarnpkg.com/tx-manager/-/tx-manager-0.2.6.tgz#05f49794695ebd71c58b794bb213927efdbf6d3e"
-  integrity sha512-19h+PacgoUuXbN2wKTpb4R+MxD9fOxil3ZsvnDRG/Z4pPboUzd/D2+VBdcH9+EEVGXovZ6bcVggIZ4RIO7LO1w==
+tx-manager@^0.2.9:
+  version "0.2.9"
+  resolved "https://registry.yarnpkg.com/tx-manager/-/tx-manager-0.2.9.tgz#dc949d7f1a3ed3a3517384f6ef89b10c0a140e02"
+  integrity sha512-IQvDo/j+K9JG1NjLOYUUegyCdfsn0D8sTjQU5w2/Mj30GB/MVPmMqWlPIuu2bwhIJY78WpOln25i60TaT5Sawg==
   dependencies:
     async-mutex "^0.2.4"
     ethers "^5.0.17"