utils: Log assert failures for easier debugging

Author: KartikSoneji

core/rust/utils/src/assertions.rs

@@ -1,6 +1,7 @@
 use solana_program::{
     account_info::AccountInfo,
     entrypoint::ProgramResult,
+    log::sol_log,
     program_error::ProgramError,
     program_pack::{IsInitialized, Pack},
     pubkey::Pubkey,
@@ -9,6 +10,13 @@ use solana_program::{
 
 pub fn assert_signer(account_info: &AccountInfo) -> ProgramResult {
     if !account_info.is_signer {
+        sol_log(
+            format!(
+                "signer assertion failed for {key}: not signer",
+                key = account_info.key,
+            )
+            .as_str(),
+        );
         Err(ProgramError::MissingRequiredSignature)
     } else {
         Ok(())
@@ -21,6 +29,13 @@ pub fn assert_initialized<T: Pack + IsInitialized>(
 ) -> Result<T, ProgramError> {
     let account: T = T::unpack_unchecked(&account_info.data.borrow())?;
     if !account.is_initialized() {
+        sol_log(
+            format!(
+                "initialized assertion failed for {key}: not initialized",
+                key = account_info.key,
+            )
+            .as_str(),
+        );
         Err(error.into())
     } else {
         Ok(account)
@@ -33,6 +48,15 @@ pub fn assert_owned_by(
     error: impl Into<ProgramError>,
 ) -> ProgramResult {
     if account.owner != owner {
+        sol_log(
+            format!(
+                "owner assertion failed for {key}: expected {expected}, got {actual}",
+                key = account.key,
+                expected = owner,
+                actual = account.owner
+            )
+            .as_str(),
+        );
         Err(error.into())
     } else {
         Ok(())
@@ -47,6 +71,17 @@ pub fn assert_derivation(
 ) -> Result<u8, ProgramError> {
     let (key, bump) = Pubkey::find_program_address(path, program_id);
     if key != *account.key {
+        sol_log(
+            format!(
+                "derivation assertion failed for {actual_key}:\n
+                \x20   expected {key} with program {program_id}, path {path:?}",
+                actual_key = account.key,
+                key = key,
+                program_id = program_id,
+                path = path,
+            )
+            .as_str(),
+        );
         return Err(error.into());
     }
     Ok(bump)
@@ -58,6 +93,15 @@ pub fn assert_rent_exempt(
     error: impl Into<ProgramError>,
 ) -> ProgramResult {
     if !rent.is_exempt(account_info.lamports(), account_info.data_len()) {
+        sol_log(
+            format!(
+                "rent exempt assertion failed for {key}: has {balance} lamports, requires at least {min} lamports",
+                key = account_info.key,
+                balance = account_info.lamports(),
+                min = rent.minimum_balance(account_info.data_len()),
+            )
+            .as_str(),
+        );
         Err(error.into())
     } else {
         Ok(())