Fix remote shutdown sender behaviour (#550)

oracle/src/sender.js

@@ -13,6 +13,7 @@ const {
   privateKeyToAddress,
   syncForEach,
   waitForFunds,
+  waitForUnsuspend,
   watchdog,
   nonceError
 } = require('./utils/utils')
@@ -45,6 +46,15 @@ async function initialize() {
     GasPrice.start(config.id)
 
     chainId = await getChainId(web3Instance)
+
+    connectQueue()
+  } catch (e) {
+    logger.error(e.message)
+    process.exit(EXIT_CODES.GENERAL_ERROR)
+  }
+}
+
+function connectQueue() {
   connectSenderToQueue({
     queueName: config.queue,
     oldQueueName: config.oldQueue,
@@ -60,15 +70,16 @@ async function initialize() {
       return main(options)
     }
   })
-  } catch (e) {
-    logger.error(e.message)
-    process.exit(EXIT_CODES.GENERAL_ERROR)
-  }
 }
 
 function resume(newBalance) {
   logger.info(`Validator balance changed. New balance is ${newBalance}. Resume messages processing.`)
-  initialize()
+  connectQueue()
+}
+
+function unsuspend() {
+  logger.info(`Oracle sender was unsuspended.`)
+  connectQueue()
 }
 
 async function readNonce(forceUpdate) {
@@ -103,11 +114,10 @@ async function main({ msg, ackMsg, nackMsg, channel, scheduleForRetry, scheduleT
       return
     }
 
-    const wasShutdown = await getShutdownFlag(logger, config.shutdownKey, false)
     if (await getShutdownFlag(logger, config.shutdownKey, true)) {
-      if (!wasShutdown) {
       logger.info('Oracle sender was suspended via the remote shutdown process')
-      }
+      channel.close()
+      waitForUnsuspend(() => getShutdownFlag(logger, config.shutdownKey, true), unsuspend)
       return
     }
 

oracle/src/shutdownManager.js

@@ -43,7 +43,7 @@ async function fetchShutdownFlag() {
   }
 
   if (config.shutdownContractAddress) {
-    const shutdownSelector = web3Side.eth.abi.encodeEventSignature(config.shutdownMethod)
+    const shutdownSelector = web3Side.eth.abi.encodeFunctionSignature(config.shutdownMethod)
     logger.debug(
       { contract: config.shutdownContractAddress, method: config.shutdownMethod, data: shutdownSelector },
       'Fetching shutdown status from contract'

oracle/src/utils/utils.js

@@ -29,9 +29,10 @@ function checkHTTPS(ORACLE_ALLOW_HTTP_FOR_RPC, logger) {
   }
 }
 
+const promiseRetryForever = f => promiseRetry(f, { forever: true, factor: 1 })
+
 async function waitForFunds(web3, address, minimumBalance, cb, logger) {
-  promiseRetry(
-    async retry => {
+  promiseRetryForever(async retry => {
     logger.debug('Getting balance of validator account')
     const newBalance = web3.utils.toBN(await web3.eth.getBalance(address))
     if (newBalance.gte(web3.utils.toBN(minimumBalance.toString(10)))) {
@@ -41,12 +42,17 @@ async function waitForFunds(web3, address, minimumBalance, cb, logger) {
       logger.debug({ balance: newBalance, minimumBalance }, 'Balance of validator is still less than the minimum')
       retry()
     }
-    },
-    {
-      forever: true,
-      factor: 1
+  })
 }
-  )
+
+async function waitForUnsuspend(getSuspendFlag, cb) {
+  promiseRetryForever(async retry => {
+    if (await getSuspendFlag()) {
+      retry()
+    } else {
+      cb()
+    }
+  })
 }
 
 function addExtraGas(gas, extraPercentage, maxGasLimit = Infinity) {
@@ -135,6 +141,7 @@ module.exports = {
   syncForEach,
   checkHTTPS,
   waitForFunds,
+  waitForUnsuspend,
   addExtraGas,
   setIntervalAndRun,
   watchdog,

oracle/src/watcher.js

@@ -164,6 +164,8 @@ async function main({ sendToQueue, sendToWorker }) {
         logger.info('Oracle watcher was suspended via the remote shutdown process')
       }
       return
+    } else if (wasShutdown) {
+      logger.info(`Oracle watcher was unsuspended.`)
     }
 
     await checkConditions()