Thread 'main' panicked at 'Expected Ok(_).

[ganesh1997oli]

I am implementing pallet-staking in extend-parachain-template. Everything works fine while building chain but while running in dev mode using ./target/release/parachain-template-node --dev this command, I got below error even though I have implemented stake inside GenesisConfig. Someone please help what I am doing wrong?

ganesholi@Ganeshs-MacBook-Air xcav-parachain % ./target/release/parachain-template-node --dev
2023-09-04 15:29:15 Parachain Collator Template    
2023-09-04 15:29:15 ✌️  version 0.9.420-df8ee1315d3    
2023-09-04 15:29:15 ❤️  by Anonymous, 2020-2023    
2023-09-04 15:29:15 📋 Chain specification: Development    
2023-09-04 15:29:15 🏷  Node name: tough-nose-3849    
2023-09-04 15:29:15 👤 Role: AUTHORITY    
2023-09-04 15:29:15 💾 Database: RocksDb at /var/folders/q3/d699hkpx49xfy236ph7sltr40000gn/T/substratejW2MvL/chains/dev/db/full    
2023-09-04 15:29:15 ⛓  Native runtime: devnet-1000 (devnet-0.tx1.au1)    
2023-09-04 15:29:16 assembling new collators for new session 0 at #0    
2023-09-04 15:29:16 assembling new collators for new session 1 at #0    

====================

Version: 0.9.420-df8ee1315d3

   0: backtrace::capture::Backtrace::new
   1: sp_panic_handler::set::{{closure}}
   2: <alloc::boxed::Box<F,A> as core::ops::function::Fn<Args>>::call
             at /rustc/5680fa18feaa87f3ff04063800aec256c3d4b4be/library/alloc/src/boxed.rs:2007:9
      std::panicking::rust_panic_with_hook
             at /rustc/5680fa18feaa87f3ff04063800aec256c3d4b4be/library/std/src/panicking.rs:709:13
   3: std::panicking::begin_panic_handler::{{closure}}
             at /rustc/5680fa18feaa87f3ff04063800aec256c3d4b4be/library/std/src/panicking.rs:597:13
   4: std::sys_common::backtrace::__rust_end_short_backtrace
             at /rustc/5680fa18feaa87f3ff04063800aec256c3d4b4be/library/std/src/sys_common/backtrace.rs:151:18
   5: rust_begin_unwind
             at /rustc/5680fa18feaa87f3ff04063800aec256c3d4b4be/library/std/src/panicking.rs:593:5
   6: core::panicking::panic_fmt
             at /rustc/5680fa18feaa87f3ff04063800aec256c3d4b4be/library/core/src/panicking.rs:67:14
   7: <pallet_staking::pallet::pallet::GenesisConfig<T> as frame_support::traits::hooks::GenesisBuild<T>>::build
   8: environmental::using
   9: sp_state_machine::basic::BasicExternalities::execute_with_storage
  10: <devnet_runtime::GenesisConfig as sp_runtime::BuildStorage>::assimilate_storage
  11: <sc_chain_spec::chain_spec::ChainSpec<G,E> as sp_runtime::BuildStorage>::assimilate_storage
  12: sp_runtime::BuildStorage::build_storage
  13: cumulus_client_cli::generate_genesis_block
  14: tokio::runtime::park::CachedParkThread::block_on
  15: tokio::runtime::context::runtime::enter_runtime
  16: tokio::runtime::runtime::Runtime::block_on
  17: sc_cli::runner::Runner<C>::run_node_until_exit
  18: parachain_template_node::command::run
  19: std::sys_common::backtrace::__rust_begin_short_backtrace
  20: std::rt::lang_start::{{closure}}
  21: core::ops::function::impls::<impl core::ops::function::FnOnce<A> for &F>::call_once
             at /rustc/5680fa18feaa87f3ff04063800aec256c3d4b4be/library/core/src/ops/function.rs:284:13
      std::panicking::try::do_call
             at /rustc/5680fa18feaa87f3ff04063800aec256c3d4b4be/library/std/src/panicking.rs:500:40
      std::panicking::try
             at /rustc/5680fa18feaa87f3ff04063800aec256c3d4b4be/library/std/src/panicking.rs:464:19
      std::panic::catch_unwind
             at /rustc/5680fa18feaa87f3ff04063800aec256c3d4b4be/library/std/src/panic.rs:142:14
      std::rt::lang_start_internal::{{closure}}
             at /rustc/5680fa18feaa87f3ff04063800aec256c3d4b4be/library/std/src/rt.rs:148:48
      std::panicking::try::do_call
             at /rustc/5680fa18feaa87f3ff04063800aec256c3d4b4be/library/std/src/panicking.rs:500:40
      std::panicking::try
             at /rustc/5680fa18feaa87f3ff04063800aec256c3d4b4be/library/std/src/panicking.rs:464:19
      std::panic::catch_unwind
             at /rustc/5680fa18feaa87f3ff04063800aec256c3d4b4be/library/std/src/panic.rs:142:14
      std::rt::lang_start_internal
             at /rustc/5680fa18feaa87f3ff04063800aec256c3d4b4be/library/std/src/rt.rs:148:20
  22: _main

Thread 'main' panicked at 'Expected Ok(_). Got Err(
    Module(
        ModuleError {
            index: 47,
            error: [
                4,
                0,
                0,
                0,
            ],
            message: Some(
                "EmptyTargets",
            ),
        },
    ),
)', /Users/ganesholi/.cargo/git/checkouts/substrate-7e08433d4c370a21/ff24c60/frame/staking/src/pallet/mod.rs:652

This is a bug. Please report it at:

        https://github.com/paritytech/cumulus/issues/new

ganesholi@Ganeshs-MacBook-Air xcav-parachain % 

[weezy20]

From the error logs I can see that the GenesisConfig for the staking pallet is panicking which is really not related to extended-parachain-template. In this line:

7: <pallet_staking::pallet::pallet::GenesisConfig<T> as frame_support::traits::hooks::GenesisBuild<T>>::build

Please check your implementation details and make sure you are instantiating the pallet properly. Also a point to note here is that this is a parachain and thus you should use something like zombienet if you are testing it as parachains require a relay chain network to provide it consensus or it will not produce blocks. Please checkout the docs for running a network using zombienet