Unknown field error during Provider::connect to beta-3 on fuels v0.42

Rust SDK
1

Hi there
I have created a brand new Sway project using latest version of fuels v0.42 by this command:

forc new counter-contract

And a test environment using:

cargo generate --init fuellabs/sway templates/sway-test-rs --name counter-contract

I wrote a simple contract, deployed the contract, and added a test which connected to the beta-3 testnet network and called a function from the contract. However, on the provider connection line, I encountered the following error:

running 1 test
thread 'do_increment' panicked at 'called `Result::unwrap()` on an `Err` value: IOError(Custom { kind: Other, error: "Response errors; Unknown field \"messageReceiptCount\" on type \"Header\".; Unknown field \"messageReceiptRoot\" on type \"Header\".; Unknown field \"chainId\" on type \"ConsensusParameters\"." })', tests/harness.rs:18:67
stack backtrace:
   0: rust_begin_unwind
             at /rustc/84c898d65adf2f39a5a98507f1fe0ce10a2b8dbc/library/std/src/panicking.rs:579:5
   1: core::panicking::panic_fmt
             at /rustc/84c898d65adf2f39a5a98507f1fe0ce10a2b8dbc/library/core/src/panicking.rs:64:14
   2: core::result::unwrap_failed
             at /rustc/84c898d65adf2f39a5a98507f1fe0ce10a2b8dbc/library/core/src/result.rs:1750:5
   3: core::result::Result<T,E>::unwrap
             at /rustc/84c898d65adf2f39a5a98507f1fe0ce10a2b8dbc/library/core/src/result.rs:1090:23
   4: integration_tests::do_increment::{{closure}}
             at ./tests/harness.rs:18:20
   5: <core::pin::Pin<P> as core::future::future::Future>::poll
             at /rustc/84c898d65adf2f39a5a98507f1fe0ce10a2b8dbc/library/core/src/future/future.rs:125:9
   6: <core::pin::Pin<P> as core::future::future::Future>::poll
             at /rustc/84c898d65adf2f39a5a98507f1fe0ce10a2b8dbc/library/core/src/future/future.rs:125:9
   7: tokio::runtime::scheduler::current_thread::CoreGuard::block_on::{{closure}}::{{closure}}::{{closure}}
             at /Users/alexey/.cargo/registry/src/github.com-1ecc6299db9ec823/tokio-1.28.2/src/runtime/scheduler/current_thread.rs:541:57
   8: tokio::runtime::coop::with_budget
             at /Users/alexey/.cargo/registry/src/github.com-1ecc6299db9ec823/tokio-1.28.2/src/runtime/coop.rs:107:5
   9: tokio::runtime::coop::budget
             at /Users/alexey/.cargo/registry/src/github.com-1ecc6299db9ec823/tokio-1.28.

2/src/runtime/coop.rs:73:5
  10: tokio::runtime::scheduler::current_thread::CoreGuard::block_on::{{closure}}::{{closure}}
             at /Users/alexey/.cargo/registry/src/github.com-1ecc6299db9ec823/tokio-1.28.2/src/runtime/scheduler/current_thread.rs:541:25
  11: tokio::runtime::scheduler::current_thread::Context::enter
             at /Users/alexey/.cargo/registry/src/github.com-1ecc6299db9ec823/tokio-1.28.2/src/runtime/scheduler/current_thread.rs:350:19
  12: tokio::runtime::scheduler::current_thread::CoreGuard::block_on::{{closure}}
             at /Users/alexey/.cargo/registry/src/github.com-1ecc6299db9ec823/tokio-1.28.2/src/runtime/scheduler/current_thread.rs:540:36
  13: tokio::runtime::scheduler::current_thread::CoreGuard::enter::{{closure}}
             at /Users/alexey/.cargo/registry/src/github.com-1ecc6299db9ec823/tokio-1.28.2/src/runtime/scheduler/current_thread.rs:615:57
  14: tokio::macros::scoped_tls::ScopedKey<T>::set
             at /Users/alexey/.cargo/registry/src/github.com-1ecc6299db9ec823/tokio-1.28.2/src/macros/scoped_tls.rs:61:9
  15: tokio::runtime::scheduler::current_thread::CoreGuard::enter
             at /Users/alexey/.cargo/registry/src/github.com-1ecc6299db9ec823/tokio-1.28.2/src/runtime/scheduler/current_thread.rs:615:27
  16: tokio::runtime::scheduler::current_thread::CoreGuard::block_on
             at /Users/alexey/.cargo/registry/src/github.com-1ecc6299db9ec823/tokio-1.28.2/src/runtime/scheduler/current_thread.rs:530:19
  17: tokio::runtime::scheduler::current_thread::CurrentThread::block_on
             at /Users/alexey/.cargo/registry/src/github.com-1ecc6299db9ec823/tokio-1.28.2/src/runtime/scheduler/current_thread.rs:154:24
  18: tokio::runtime::runtime::Runtime::block_on
             at /Users/alexey/.cargo/registry/src/github.com-1ecc6299db9ec823/tokio-1.28.2/src/runtime/runtime.rs:302:47
  19: integration_tests::do_increment
             at ./tests/harness.rs:28:5
  20: integration_tests::do_increment::{{closure}}
             at ./tests/harness.rs:16:25
  21: core::ops::function::FnOnce::call_once
             at /rustc/84c898d65adf2f39a5a98507f1fe0ce10a2b8dbc/library/core/src/ops/function.rs:250:5
  22: core::ops::function::FnOnce::call_once
             at /rustc/84c898d65adf2f39a5a98507f1fe0ce10a2b8dbc/library/core/src/ops/function.rs:250:5

note: Some details are omitted, run with `RUST_BACKTRACE=full
1 Like
2

You are using fuels v0.42, while beta-3 testnet expects fuels v0.39.

I took your repo, ran fuelup default beta-3 to switch to beta-3 toolchain, changed fuels version to 0.39 in your Cargo.toml, and cargo test passed. You can find my commit here.

3

Good, thanks
Btw is there any way to use fuels v0.42 on beta-3?

4

No, because fuels v0.42 uses fuel-core 0.18.1 which is not compatible with beta-3.

5

Ok, thanks now I totally understand :saluting_face:
Looking forward to new rust sdk version with beta-3 support