How to Convert `QuadExtField<Fp12ParamsWrapper<Fq12Parameters>>` Back to Original Hex?

[vinay10949]

I’m working on a codebase and am encountering an issue when trying to convert a decrypted message of type QuadExtField<Fp12ParamsWrapper<Fq12Parameters>> back to its original hexadecimal string format.

Here's a snippet of the code:

let my_str = "00000000000000008a7f5d0f15ef296b1d80813c63241ff1952a1d3d4fbd0cb8008242f1000e3bb7";

// Serialize the input hexadecimal string
let mut bytes: Vec<u8> = hex::decode(my_str).unwrap();
let m = Fq12::from_random_bytes(&data).unwrap();

// Encrypt the message
let ct = enc(&pk, 0, m);

// Decrypt the ciphertext
let decrypted_m = dec(&mut sk, &ct); // Type: QuadExtField<Fp12ParamsWrapper<Fq12Parameters>>

When I try to convert decrypted_m back to bytes and then to a hex string, the output is incorrect. Instead of getting the original my_str, I end up with a padded and incorrect result, such as:

"00000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000008a0000000000000000000000000000000000000000000000000000000000000000000000000000000000000000007f5d0f..."

Also details

ark-ff = "0.3"
ark-ec = "0.3"
ark-bls12-381 = "0.3"
ark-std = "0.3"
rand = "0.8.5"
bls12_381 = "0.8.0"
hex-literal = "=0.4.1"
sha2 = "0.10.8"
hex = "0.4"
serde = { version = "1.0", features = ["derive"] }
serde_json = "1.0"
ark-serialize = "0.3"

Question:

• How can I correctly convert QuadExtField<Fp12ParamsWrapper<Fq12Parameters>> back to the original hexadecimal string (my_str)?
• Is there a specific deserialization method or field extraction process I need to follow for this type?

Additional Context:

• I’m using Fq12 for cryptographic operations.
• The encryption and decryption steps work as expected, but the deserialization back to the original hex string is not producing the correct output.
• Any guidance or references to examples would be greatly appreciated!

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Thank You:

Thanks in advance for your help! 😊