Fix zero copy generation

crates/anchor-idl/src/state.rs

@@ -43,7 +43,7 @@ pub fn generate_account(
             }
         };
         quote! {
-            #[account(zero_copy)]
+            #[account(zero_copy(unsafe))]
             #repr
         }
     } else {

crates/anchor-idl/src/typedef.rs

@@ -165,7 +165,8 @@ pub fn generate_struct(
             }
         };
         quote! {
-            #[zero_copy]
+            #[derive(::borsh::BorshSerialize, ::borsh::BorshDeserialize)]
+            #[zero_copy(unsafe)]
             #repr
         }
     } else {

examples/kamino-lend/Cargo.toml

@@ -19,3 +19,7 @@ cpi = ["no-entrypoint"]
 [dependencies]
 anchor-gen = { version = "0.4.0", path = "../../crates/anchor-gen" }
 anchor-lang = ">=0.20"
+# Override anchor to use borsh with the const-generics feature
+# Allows to borsh serialize arrays of any length
+borsh = { version = "0.10.3", features = ["const-generics"] }
+bytemuck = { version = "1.23", features = ["derive", "min_const_generics"] }

examples/kamino-lend/src/lib.rs

@@ -9,4 +9,44 @@
 
 #![allow(clippy::too_many_arguments)]
 
-anchor_gen::generate_cpi_interface!(idl_path = "idl.json");
+use anchor_lang::zero_copy;
+
+anchor_gen::generate_cpi_interface!(
+    idl_path = "idl.json",
+    zero_copy(
+        UpdateConfigMode,
+        UpdateLendingMarketConfigValue,
+        UpdateLendingMarketMode,
+        LastUpdate,
+        ElevationGroup,
+        InitObligationArgs,
+        ObligationCollateral,
+        ObligationLiquidity,
+        AssetTier,
+        BigFractionBytes,
+        FeeCalculation,
+        ReserveCollateral,
+        ReserveConfig,
+        ReserveFarmKind,
+        ReserveFees,
+        ReserveLiquidity,
+        ReserveStatus,
+        WithdrawalCaps,
+        PriceHeuristic,
+        PythConfiguration,
+        ScopeConfiguration,
+        SwitchboardConfiguration,
+        TokenInfo,
+        BorrowRateCurve,
+        CurvePoint,
+        UserState,
+        LendingMarket,
+        Obligation,
+        ReferrerState,
+        ReferrerTokenState,
+        UserMetadata,
+        Reserve,
+        Referrer,
+        ReferrerToken,
+    )
+);