add conf mint/burn failure docs; remove todo

Author: abcalphabet

token/program-2022/src/extension/confidential_mint_burn/account_info.rs

@@ -50,7 +50,6 @@ impl SupplyAccountInfo {
             return Err(TokenError::InvalidState);
         }
         // fresh mints are initialized with a zeroed decryptable_supply
-        // TODO: include decryptable supply in InitMint instruction
         let current_decyptable_supply = if self.decryptable_supply != PodAeCiphertext::default() {
             // decrypt the current supply
             TryInto::<AeCiphertext>::try_into(self.decryptable_supply)

token/program-2022/src/extension/confidential_mint_burn/instruction.rs

@@ -97,6 +97,9 @@ pub enum ConfidentialMintBurnInstruction {
     UpdateDecryptableSupply,
     /// Mints tokens to confidential balance
     ///
+    /// Fails if the destination account is frozen.
+    /// Fails if the associated mint is extended as `NonTransferable`.
+    ///
     /// Accounts expected by this instruction:
     ///
     ///   * Single authority
@@ -135,6 +138,9 @@ pub enum ConfidentialMintBurnInstruction {
     ConfidentialMint,
     /// Burn tokens from confidential balance
     ///
+    /// Fails if the destination account is frozen.
+    /// Fails if the associated mint is extended as `NonTransferable`.
+    ///
     /// Accounts expected by this instruction:
     ///
     ///   * Single authority

token/program-2022/src/extension/confidential_transfer/account_info.rs

@@ -241,7 +241,6 @@ impl TransferAccountInfo {
 
     /// Create a transfer proof data that is split into equality, ciphertext
     /// validity, and range proofs.
-    #[allow(clippy::type_complexity)]
     pub fn generate_split_transfer_proof_data(
         &self,
         transfer_amount: u64,