Reviewing files that changed from the base of the PR and between 1935bdf and 63b27be.

• x/move/keeper/bank.go (4 hunks)

x/move/keeper/bank.go (2)

102-133:

✅ Verification successful

Verify the new store walking approach for correctness and performance.

The method has been completely rewritten to use VMStore.Walk instead of manual iteration. While this change aligns with the PR objective of individual balance queries, there are several concerns:

1. Performance: Each iteration now calls GetBalance individually, which executes a separate VM function call
2. Error handling: Errors are propagated immediately, which could cause iteration to stop early
3. Logic verification: Need to ensure the prefix-based walking covers all relevant entries

Let me verify the store walking logic and compare performance characteristics:

Consider adding error recovery or logging for debugging:

 return k.VMStore.Walk(ctx, new(collections.Range[[]byte]).Prefix(collections.NewPrefix(prefix)), func(_, value []byte) (stop bool, err error) {
   storeAddr, err := vmtypes.NewAccountAddressFromBytes(value)
   if err != nil {
+    // Log parsing error but continue iteration
+    k.Logger(ctx).Debug("failed to parse store address", "error", err, "value", fmt.Sprintf("%x", value))
-    return true, err
+    return false, nil
   }

---

🏁 Script executed:

#!/bin/bash
# Search for other usages of VMStore.Walk to understand the pattern
rg -A 15 "VMStore\.Walk" --type go

# Look for the old implementation pattern to understand what was replaced
rg -A 20 -B 5 "IterateAccountBalances" --type go

Length of output: 15579

---

IterateAccountBalances store-walk usage is sound

• Prefix-based scanning (types.GetTableEntryPrefix) is consistent with all other VMStore.Walk calls and will cover every table entry.
• Immediate error propagation matches the existing pattern in staking.go and keeper.go; silent error recovery isn’t used elsewhere.
• Invoking GetBalance per entry incurs one VM call per denomination by design—if this per-balance granularity becomes a bottleneck, consider adding a batched query or caching layer in a follow-up.

No changes required.

---

69-70:

❓ Verification inconclusive

Critical concern: Error suppression may mask legitimate issues.

While ignoring errors from dispatchable fungible assets addresses the immediate dispatch FA failure issue, returning zero balance for all errors could mask legitimate system failures like network issues, VM execution problems, or data corruption.

Consider implementing more granular error handling:

 if err != nil {
-  // ignore fetching error due to dispatchable fungible assets
-  return sdkmath.ZeroInt(), nil
+  // Check if error is specifically related to dispatchable fungible assets
+  if isDispatchFAError(err) {
+    return sdkmath.ZeroInt(), nil
+  }
+  return sdkmath.ZeroInt(), err
 }

Let me verify what types of errors the ExecuteViewFunctionJSON can return to determine if blanket suppression is appropriate:

---

🏁 Script executed:

#!/bin/bash
# Search for error types returned by ExecuteViewFunctionJSON and related dispatch FA error patterns
rg -A 10 -B 5 "ExecuteViewFunctionJSON.*error|dispatch.*fungible.*asset.*error" --type go

Length of output: 91

---

🏁 Script executed:

#!/bin/bash
# 1. Locate all usages of ExecuteViewFunctionJSON in the repo
rg -n "ExecuteViewFunctionJSON" --type go

# 2. If any are found, show surrounding context (±5 lines) for each match
rg -n -A 5 -B 5 "ExecuteViewFunctionJSON" --type go

Length of output: 3578

---

🏁 Script executed:

#!/bin/bash
# Display the implementation of ExecuteViewFunctionJSON in handler.go
sed -n '530,600p' x/move/keeper/handler.go

Length of output: 1519

---

Refine error suppression to target only dispatchable FA errors

Blanket‐suppressing all errors and returning a zero balance may conceal genuine failures (e.g. payload build errors, VM aborts, gas or state issues). Instead, detect and ignore only the specific “dispatchable fungible asset” error, propagating all others:

 func (k MoveBankKeeper) GetBalance(… ) (sdkmath.Int, error) {
-   // ignore fetching error due to dispatchable fungible assets
-   return sdkmath.ZeroInt(), nil
+   // only suppress dispatchable FA errors
+   if isDispatchFAError(err) {
+     return sdkmath.ZeroInt(), nil
+   }
+   // propagate any other errors
+   return sdkmath.ZeroInt(), err
 }

• File: x/move/keeper/bank.go (around lines 69–70)
• Action:

1. Determine which errors ExecuteViewFunctionJSON can return (payload, VM, gas, etc.).
2. Implement isDispatchFAError(err) to match only the FA‐dispatch error.
3. Ensure all other errors bubble up for proper visibility and handling.

Reviewing files that changed from the base of the PR and between 63b27be and 543dc62.

• x/move/keeper/bank.go (3 hunks)

• GitHub Check: Run test and upload codecov
• GitHub Check: golangci-lint
• GitHub Check: Analyze (go)
• GitHub Check: Analyze (actions)

x/move/keeper/bank.go (1)

69-70: LGTM: Error handling change aligns with PR objectives.

The relaxed error handling to return zero balance when fetching fails addresses the PR objective of preventing bank balance query failures due to dispatch FA issues. This is a sensible approach for maintaining system stability.