unwrap in Iden3calc lib #350
Description
Got this error message using Zerokit 0.9:
thread '<unnamed>' panicked at /home/runner/.cargo/registry/src/index.crates.io-1949cf8c6b5b557f/rln-0.9.0/src/circuit/iden3calc.rs:41:73:
called `Result::unwrap()` on an `Err` value: Custom { kind: InvalidData, error: DecodeError { description: "invalid wire type: EndGroup (expected LengthDelimited)", stack: [("Node", "node")] } }
stack backtrace:
0: 0x560a64652812 - <std::sys::backtrace::BacktraceLock::print::DisplayBacktrace as core::fmt::Display>::fmt::hdcfcb6d4c8489523
1: 0x560a644e4e23 - core::fmt::write::h8a494366950f23bb
2: 0x560a6465175f - std::io::Write::write_fmt::h6556609fca33d0b1
3: 0x560a64652672 - std::sys::backtrace::BacktraceLock::print::hb2a626a81e06b2dc
4: 0x560a646520a9 - std::panicking::default_hook::{{closure}}::h4f78485264f12d10
5: 0x560a64651a94 - std::panicking::default_hook::h2c66fc99e962531d
6: 0x560a64651412 - std::panicking::rust_panic_with_hook::h33ac55f64bbd807d
7: 0x560a64690718 - std::panicking::begin_panic_handler::{{closure}}::h30e7cb89678a57fe
8: 0x560a64690679 - std::sys::backtrace::__rust_end_short_backtrace::hed60f27456c16ced
9: 0x560a646936ac - __rustc[de2ca18b4c54d5b8]::rust_begin_unwind
10: 0x560a644e387f - core::panicking::panic_fmt::h62f63d096dd276af
11: 0x560a644e9505 - core::result::unwrap_failed::h95bc3f5a607b2c95
12: 0x560a64599a8d - rln::circuit::iden3calc::calc_witness::hfc937de7db39610c
13: 0x560a64591f29 - rln::protocol::generate_proof::h240401cd65764d19
14: 0x560a6445f6d5 - <rayon_core::job::HeapJob<BODY> as rayon_core::job::Job>::execute::h90494476d3f3bbc7
15: 0x560a6451a13a - rayon_core::registry::WorkerThread::wait_until_cold::h9ef9b4a8e79ae50c
16: 0x560a645194d5 - std::sys::backtrace::__rust_begin_short_backtrace::h3ececc9df1319d1b
17: 0x560a6451beeb - core::ops::function::FnOnce::call_once{{vtable.shim}}::hb1616392576d2aab
18: 0x560a64693b3f - std::sys::pal::unix::thread::Thread::new::thread_start::hb6e99e73da4d28f8
19: 0x7fa38689caa4 - <unknown>
20: 0x7fa386929c6c - <unknown>
21: 0x0 - <unknown>
Rayon: detected unexpected panic; aborting
After looking at the code, there are some unwrap in iden3calc lib. Would be nice to have proper error handling here :)