pub fn transfer_split_proof_data(
current_available_balance: &ElGamalCiphertext,
current_decryptable_available_balance: &AeCiphertext,
transfer_amount: u64,
source_elgamal_keypair: &ElGamalKeypair,
aes_key: &AeKey,
destination_elgamal_pubkey: &ElGamalPubkey,
auditor_elgamal_pubkey: Option<&ElGamalPubkey>,
) -> Result<TransferProofData, TokenProofGenerationError>