uses http as default RPC provider for nodes running in integration tests as a workaround for dropped subscriptions

tests/integration/multinodes.nim

@@ -67,6 +67,10 @@ template multinodesuite*(name: string, body: untyped) =
     let starttime = now().format("yyyy-MM-dd'_'HH:mm:ss")
     var currentTestName = ""
     var nodeConfigs: NodeConfigs
+    # Workaround for https://github.com/NomicFoundation/hardhat/issues/2053
+    # Do not use websockets, but use http and polling to stop subscriptions
+    # from being removed after 5 minutes
+    let defaultProviderUrl = "http://localhost:8545"
     var ethProvider {.inject, used.}: JsonRpcProvider
     var accounts {.inject, used.}: seq[Address]
     var snapshot: JsonNode
@@ -196,6 +200,7 @@ template multinodesuite*(name: string, body: untyped) =
     proc startClientNode(conf: CodexConfig): Future[NodeProcess] {.async.} =
       let clientIdx = clients().len
       var config = conf
+      config.addCliOption(StartUpCmd.persistence, "--eth-provider", defaultProviderUrl)
       config.addCliOption(StartUpCmd.persistence, "--eth-account", $accounts[running.len])
       return await newCodexProcess(clientIdx, config, Role.Client)
 
@@ -203,6 +208,7 @@ template multinodesuite*(name: string, body: untyped) =
       let providerIdx = providers().len
       var config = conf
       config.addCliOption("--bootstrap-node", bootstrap)
+      config.addCliOption(StartUpCmd.persistence, "--eth-provider", defaultProviderUrl)
       config.addCliOption(StartUpCmd.persistence, "--eth-account", $accounts[running.len])
       config.addCliOption(PersistenceCmd.prover, "--circom-r1cs",
         "vendor/codex-contracts-eth/verifier/networks/hardhat/proof_main.r1cs")
@@ -217,6 +223,7 @@ template multinodesuite*(name: string, body: untyped) =
       let validatorIdx = validators().len
       var config = conf
       config.addCliOption("--bootstrap-node", bootstrap)
+      config.addCliOption(StartUpCmd.persistence, "--eth-provider", defaultProviderUrl)
       config.addCliOption(StartUpCmd.persistence, "--eth-account", $accounts[running.len])
       config.addCliOption(StartUpCmd.persistence, "--validator")
 
@@ -261,10 +268,7 @@ template multinodesuite*(name: string, body: untyped) =
           quit(1)
 
       try:
-        # Workaround for https://github.com/NomicFoundation/hardhat/issues/2053
-        # Do not use websockets, but use http and polling to stop subscriptions
-        # from being removed after 5 minutes
-        ethProvider = JsonRpcProvider.new("http://localhost:8545")
+        ethProvider = JsonRpcProvider.new(defaultProviderUrl)
         # if hardhat was NOT started by the test, take a snapshot so it can be
         # reverted in the test teardown
         if nodeConfigs.hardhat.isNone: