cli: Fixed --transfer-hook CLI option not allowing default Pubkey as value (#605)

* Fixed transfer-hook CLI option not allowing default Pubkey as value

* review changes

Author: tiago18c

Cargo.lock

@@ -32,6 +32,7 @@ solana-sdk = "2.2.1"
 solana-system-interface = "1"
 solana-transaction-status = "2.3.4"
 spl-associated-token-account-client = { version = "2.0.0" }
+spl-pod = { version = "0.5.1" }
 spl-token = { version = "8.0", features = ["no-entrypoint"] }
 spl-token-2022 = { version = "9.0.0", path = "../../program", features = ["no-entrypoint"] }
 spl-token-client = { version = "0.17.0", path = "../rust-legacy" }

clients/cli/Cargo.toml

@@ -35,6 +35,7 @@ use {
     },
     solana_system_interface::program as system_program,
     spl_associated_token_account_client::address::get_associated_token_address_with_program_id,
+    spl_pod::optional_keys::OptionalNonZeroPubkey,
     spl_token_2022::{
         extension::{
             confidential_transfer::{
@@ -350,9 +351,12 @@ async fn command_create_token(
     }
 
     if transfer_hook_program_id.is_some() || enable_transfer_hook {
+        let program_id = transfer_hook_program_id
+            .map(OptionalNonZeroPubkey)
+            .unwrap_or_default();
         extensions.push(ExtensionInitializationParams::TransferHook {
             authority: Some(authority),
-            program_id: transfer_hook_program_id,
+            program_id: program_id.into(),
         });
     }