Add LiteSVM integration test for cutils program

Exercises the cutils program end to end under LiteSVM:
- Builds a real Token-Metadata sized-collection NFT (mint + metadata +
  master edition) so Bubblegum MintToCollectionV1's collection check passes.
- Creates a ConcurrentMerkleTree<3,8> via account-compression alloc +
  Bubblegum create_tree_config.
- Calls the cutils `mint` instruction to mint one cNFT into the tree/collection.
- Recomputes data_hash/creator_hash exactly as Bubblegum stores the leaf
  (collection verified=true after MintToCollectionV1), builds the empty-node
  proof for leaf 0, reads the live root, and calls the cutils `verify`
  instruction, asserting success and that a tampered data_hash fails.

Adds the mpl_token_metadata mainnet fixture (required by MintToCollectionV1)
and two clippy allows in the program source (diverging_sub_expression false
positive from Anchor's #[program] macro, and vec_init_then_push on the
intentional MintToCollectionV1 account-meta builder).

https://claude.ai/code/session_013dpnF6uSGWXjkJJZseqzcP

Author: claude

compression/cutils/anchor/programs/cutils/src/bubblegum_types.rs

@@ -105,9 +105,13 @@ pub fn leaf_schema_v1_hash(
 pub fn get_asset_id(tree: &Pubkey, nonce: u64) -> Pubkey {
     // mpl-bubblegum program ID
     let bubblegum_id = Pubkey::new_from_array([
-        0x98, 0x8b, 0x80, 0xeb, 0x79, 0x35, 0x28, 0x69, 0xb2, 0x24, 0x74, 0x5f, 0x59, 0xdd,
-        0xbf, 0x8a, 0x26, 0x58, 0xca, 0x13, 0xdc, 0x68, 0x81, 0x21, 0x26, 0x35, 0x1c, 0xae,
-        0x07, 0xc1, 0xa5, 0xa5,
+        0x98, 0x8b, 0x80, 0xeb, 0x79, 0x35, 0x28, 0x69, 0xb2, 0x24, 0x74, 0x5f, 0x59, 0xdd, 0xbf,
+        0x8a, 0x26, 0x58, 0xca, 0x13, 0xdc, 0x68, 0x81, 0x21, 0x26, 0x35, 0x1c, 0xae, 0x07, 0xc1,
+        0xa5, 0xa5,
     ]);
-    Pubkey::find_program_address(&[b"asset", tree.as_ref(), &nonce.to_le_bytes()], &bubblegum_id).0
+    Pubkey::find_program_address(
+        &[b"asset", tree.as_ref(), &nonce.to_le_bytes()],
+        &bubblegum_id,
+    )
+    .0
 }

compression/cutils/anchor/programs/cutils/src/instructions/mint.rs

@@ -1,6 +1,6 @@
 use crate::bubblegum_types::{
-    Collection, Creator, MetadataArgs, MintToCollectionV1InstructionArgs,
-    TokenProgramVersion, TokenStandard, MINT_TO_COLLECTION_V1_DISCRIMINATOR,
+    Collection, Creator, MetadataArgs, MintToCollectionV1InstructionArgs, TokenProgramVersion,
+    TokenStandard, MINT_TO_COLLECTION_V1_DISCRIMINATOR,
 };
 use crate::*;
 use anchor_lang::solana_program::{
@@ -75,10 +75,10 @@ impl Mint<'_> {
         Ok(())
     }
 
-    pub fn actuate<'info>(
-        context: Context<'info, Mint<'info>>,
-        params: MintParams,
-    ) -> Result<()> {
+    // `with_capacity` + push is intentional here: it documents the exact 16-account
+    // MintToCollectionV1 layout in CPI order, so allow clippy's vec_init_then_push.
+    #[allow(clippy::vec_init_then_push)]
+    pub fn actuate<'info>(context: Context<'info, Mint<'info>>, params: MintParams) -> Result<()> {
         // Build MintToCollectionV1 instruction data
         let args = MintToCollectionV1InstructionArgs {
             metadata: MetadataArgs {
@@ -188,7 +188,10 @@ impl Mint<'_> {
             context.accounts.payer.to_account_info(),
             context.accounts.tree_delegate.to_account_info(),
             context.accounts.collection_authority.to_account_info(),
-            context.accounts.collection_authority_record_pda.to_account_info(),
+            context
+                .accounts
+                .collection_authority_record_pda
+                .to_account_info(),
             context.accounts.collection_mint.to_account_info(),
             context.accounts.collection_metadata.to_account_info(),
             context.accounts.edition_account.to_account_info(),

compression/cutils/anchor/programs/cutils/src/lib.rs

@@ -1,3 +1,7 @@
+// False positive emitted by Anchor's `#[program]` macro expansion; accepted in
+// this repo (the sibling cnft-burn example does the same).
+#![allow(clippy::diverging_sub_expression)]
+
 pub mod instructions;
 pub use instructions::*;
 
@@ -10,16 +14,14 @@ use anchor_lang::prelude::*;
 
 /// SPL Account Compression program ID (cmtDvXumGCrqC1Age74AVPhSRVXJMd8PJS91L8KbNCK)
 const SPL_ACCOUNT_COMPRESSION_ID: Pubkey = Pubkey::new_from_array([
-    0x09, 0x2a, 0x13, 0xee, 0x95, 0xc4, 0x1c, 0xba, 0x08, 0xa6, 0x7f, 0x5a, 0xc6, 0x7e, 0x8d,
-    0xf7, 0xe1, 0xda, 0x11, 0x62, 0x5e, 0x1d, 0x64, 0x13, 0x7f, 0x8f, 0x4f, 0x23, 0x83, 0x03,
-    0x7f, 0x14,
+    0x09, 0x2a, 0x13, 0xee, 0x95, 0xc4, 0x1c, 0xba, 0x08, 0xa6, 0x7f, 0x5a, 0xc6, 0x7e, 0x8d, 0xf7,
+    0xe1, 0xda, 0x11, 0x62, 0x5e, 0x1d, 0x64, 0x13, 0x7f, 0x8f, 0x4f, 0x23, 0x83, 0x03, 0x7f, 0x14,
 ]);
 
 /// mpl-bubblegum program ID (BGUMAp9Gq7iTEuizy4pqaxsTyUCBK68MDfK752saRPUY)
 const MPL_BUBBLEGUM_ID: Pubkey = Pubkey::new_from_array([
-    0x98, 0x8b, 0x80, 0xeb, 0x79, 0x35, 0x28, 0x69, 0xb2, 0x24, 0x74, 0x5f, 0x59, 0xdd, 0xbf,
-    0x8a, 0x26, 0x58, 0xca, 0x13, 0xdc, 0x68, 0x81, 0x21, 0x26, 0x35, 0x1c, 0xae, 0x07, 0xc1,
-    0xa5, 0xa5,
+    0x98, 0x8b, 0x80, 0xeb, 0x79, 0x35, 0x28, 0x69, 0xb2, 0x24, 0x74, 0x5f, 0x59, 0xdd, 0xbf, 0x8a,
+    0x26, 0x58, 0xca, 0x13, 0xdc, 0x68, 0x81, 0x21, 0x26, 0x35, 0x1c, 0xae, 0x07, 0xc1, 0xa5, 0xa5,
 ]);
 
 #[derive(Clone)]
@@ -38,10 +40,7 @@ pub mod cutils {
     use super::*;
 
     #[access_control(context.accounts.validate(&context, &params))]
-    pub fn mint<'info>(
-        context: Context<'info, Mint<'info>>,
-        params: MintParams,
-    ) -> Result<()> {
+    pub fn mint<'info>(context: Context<'info, Mint<'info>>, params: MintParams) -> Result<()> {
         Mint::actuate(context, params)
     }