> Aztec.nr API reference, v6.0.0 (mainnet and testnet). Index: https://docs.aztec.network/aztec-nr-api/v6.0.0/llms.txt

# Function try_decode_fields_from_bytes

Module: `noir_aztec::utils::conversion::fields_as_bytes`

```rust
pub fn try_decode_fields_from_bytes<let N: u32>(
    bytes: BoundedVec<u8, N>,
) -> Option<BoundedVec<Field, N / 32>>
```

Decodes bytes back into fields, returning None on failure.

Inverse of [`encode_fields_as_bytes`](/aztec-nr-api/v6.0.0/noir_aztec/utils/conversion/fields_as_bytes/fn.encode_fields_as_bytes.md). Returns `Option::none()` if the input length is not a multiple of 32, or if any 32-byte chunk is `>=` the BN254 field modulus.