x/fungible/types/genesis.go (1)

Line range hint 1-35: Add documentation for contract addresses

The file lacks documentation explaining the purpose and significance of the SystemContract and ConnectorZevm addresses.

Add documentation above the SystemContract struct:

// SystemContract contains addresses for core system contracts
// SystemContract: The main system contract address that handles core functionality
// ConnectorZevm: The ZevM connector contract that facilitates cross-chain operations
type SystemContract struct {
    SystemContract string
    ConnectorZevm  string
}

x/fungible/simulation/decoders.go (1)

13-15: Enhance function documentation for better clarity.

Consider expanding the documentation to include:

• Description of panic conditions
• Format of the returned string
• Parameter types and their purpose

-// NewDecodeStore returns a decoder function closure that unmarshals the KVPair's
-// Value to the corresponding fungible types.
+// NewDecodeStore returns a decoder function closure that unmarshals the KVPair's
+// Value to the corresponding fungible types. The returned function takes two kv.Pair
+// parameters and returns a formatted string comparing their values.
+//
+// The decoder supports the following key prefixes:
+// - SystemContractKey: Decodes to types.SystemContract
+// - ForeignCoinsKeyPrefix: Decodes to types.ForeignCoins
+//
+// It panics if an unsupported key prefix is encountered.

x/observer/module_simulation.go (2)

13-15: Excellent refactoring to improve modularity

The delegation to simulation.RandomizedGenState is a good architectural choice that:

• Centralizes genesis state generation logic
• Reduces code duplication
• Improves maintainability

Consider documenting the expected behavior of RandomizedGenState in the package documentation to help future maintainers understand the genesis state generation strategy.

---

32-35: Clean implementation with room for documentation improvement

The refactoring to use simulation.WeightedOperations improves code clarity and maintainability.

Consider adding a comment explaining the expected parameters and their impact on operation weights:

 // WeightedOperations returns the all the gov module operations with their respective weights.
+// Parameters:
+// - appParams: Application parameters for weight calculation
+// - cdc: Codec for encoding/decoding
+// - keeper: Module keeper for accessing state
 func (am AppModule) WeightedOperations(simState module.SimulationState) []simtypes.WeightedOperation {

x/fungible/module_simulation.go (1)

27-29: Consider adding documentation for the store decoder registration

The implementation is correct and follows standard patterns. However, it would be beneficial to add a brief comment explaining what types of store items this decoder handles.

 // RegisterStoreDecoder registers a decoder
+// for fungible module's types
 func (am AppModule) RegisterStoreDecoder(sdr sdk.StoreDecoderRegistry) {

x/fungible/simulation/decoders_test.go (3)

15-21: Add function documentation and handle unused return values.

The test function setup could be improved for better maintainability and clarity.

Apply these changes:

+// TestDecodeStore validates the store decoder functionality for fungible module
+// by testing the decoding of SystemContract and ForeignCoins data
 func TestDecodeStore(t *testing.T) {
-    k, _, _, _ := keepertest.FungibleKeeper(t)
+    k, ctx, _, keeper := keepertest.FungibleKeeper(t)
+    _ = ctx  // Explicitly ignore if unused
+    _ = keeper  // Explicitly ignore if unused

---

22-27: Consider adding error handling for marshaling operations.

While MustMarshal is commonly used in tests, consider using Marshal with proper error handling for more robust tests.

Consider this approach:

 kvPairs := kv.Pairs{
     Pairs: []kv.Pair{
-        {Key: []byte(types.SystemContractKey), Value: cdc.MustMarshal(systemContract)},
-        {Key: []byte(types.ForeignCoinsKeyPrefix), Value: cdc.MustMarshal(&foreignCoins)},
+        {
+            Key: []byte(types.SystemContractKey),
+            Value: func() []byte {
+                bz, err := cdc.Marshal(systemContract)
+                require.NoError(t, err)
+                return bz
+            }(),
+        },
+        {
+            Key: []byte(types.ForeignCoinsKeyPrefix),
+            Value: func() []byte {
+                bz, err := cdc.Marshal(&foreignCoins)
+                require.NoError(t, err)
+                return bz
+            }(),
+        },
     },
 }

---

37-43: Enhance test execution with additional validations.

The current test execution could benefit from more comprehensive error checking and edge cases.

Consider enhancing the test execution:

 for i, tt := range tests {
     i, tt := i, tt
     t.Run(tt.name, func(t *testing.T) {
-        require.Equal(t, tt.expectedLog, dec(kvPairs.Pairs[i], kvPairs.Pairs[i]))
+        // Test normal case
+        result := dec(kvPairs.Pairs[i], kvPairs.Pairs[i])
+        require.NotEmpty(t, result)
+        require.Equal(t, tt.expectedLog, result)
+
+        // Test with nil values
+        require.NotPanics(t, func() {
+            dec(kv.Pair{}, kv.Pair{})
+        })
     })
 }

x/fungible/keeper/keeper.go (1)

57-59: Add documentation and consider method organization.

While the implementation is correct, consider:

1. Adding documentation to explain the method's purpose and usage
2. Grouping it with other getter methods for better code organization

-func (k Keeper) GetCodec() codec.Codec {
-	return k.cdc
-}
+// GetCodec returns the codec used for serialization and deserialization
+func (k Keeper) GetCodec() codec.Codec {
+	return k.cdc
+}

x/observer/types/genesis.go (1)

Line range hint 22-52: Add validation for the Keygen field.

The Validate() function performs thorough validation for NodeAccount and ChainNonces, but lacks validation for the newly initialized Keygen field. Consider adding validation to ensure consistency.

 func (gs GenesisState) Validate() error {
+    // Validate Keygen if present
+    if gs.Keygen != nil {
+        // Add appropriate validation logic for Keygen fields
+    }
+
     // Check for duplicated index in nodeAccount
     nodeAccountIndexMap := make(map[string]bool)

x/observer/keeper/keeper.go (2)

30-30: Consider adding validation for required keeper dependencies

While the authority validation is good, consider adding validation for the new keeper dependencies to ensure they're not nil. This follows defensive programming practices common in Cosmos SDK modules.

 func NewKeeper(
   cdc codec.Codec,
   storeKey,
   memKey storetypes.StoreKey,
   stakingKeeper types.StakingKeeper,
   slashinKeeper types.SlashingKeeper,
   authorityKeeper types.AuthorityKeeper,
   lightclientKeeper types.LightclientKeeper,
   bankKeeper types.BankKeeper,
   authKeeper types.AccountKeeper,
   authority string,
 ) *Keeper {
   if _, err := sdk.AccAddressFromBech32(authority); err != nil {
     panic(err)
   }
+  if bankKeeper == nil {
+    panic("bankKeeper is nil")
+  }
+  if authKeeper == nil {
+    panic("authKeeper is nil")
+  }

Also applies to: 37-38, 53-54

---

91-93: Consider adding documentation for codec capabilities

The change to codec.Codec is good as it provides more flexibility. Consider adding a doc comment to clarify the supported encoding formats (JSON/Binary) for future maintainers.

+// Codec returns the keeper's codec which supports both binary and JSON encoding
 func (k Keeper) Codec() codec.Codec {
   return k.cdc
 }

x/observer/types/expected_keepers.go (2)

5-5: Consider using a more specific alias for auth types

To improve code clarity and prevent potential naming conflicts with the local package types, consider using a more specific alias.

-"github.com/cosmos/cosmos-sdk/x/auth/types"
+"github.com/cosmos/cosmos-sdk/x/auth/types" authtypes

---

67-70: Enhance AccountKeeper documentation

While the interface is well-designed, consider expanding the documentation to clarify:

1. The purpose of "noalias" directive
2. The specific simulation scenarios where this keeper is used

-// AccountKeeper defines the expected account keeper used for simulations (noalias)
+// AccountKeeper defines the expected account keeper used for simulations.
+// The noalias directive is used to prevent interface aliasing during simulations,
+// ensuring clean dependency tracking during test scenarios.

x/crosschain/simulation/decoders_test.go (3)

15-26: Add function documentation and consider handling all keeper return values.

1. Add documentation to explain the test's purpose and methodology.
2. Consider handling or documenting why we're ignoring the keeper's return values.

+// TestDecodeStore validates the simulation store decoder's ability to correctly
+// decode various cross-chain related store entries including transactions,
+// trackers, and configuration data.
 func TestDecodeStore(t *testing.T) {
-    k, _, _, _ := keepertest.CrosschainKeeper(t)
+    k, ctx, _, keeper2 := keepertest.CrosschainKeeper(t)
+    // Note: ctx and keeper2 are unused in this test but kept for clarity

---

27-38: Consider consistent pointer usage and error handling in marshaling.

The marshaling operations use MustMarshal which panics on error. For production code, consider:

1. Using consistent pointer/value types for marshaling
2. Implementing proper error handling instead of using MustMarshal

 kvPairs := kv.Pairs{
     Pairs: []kv.Pair{
-        {Key: types.KeyPrefix(types.CCTXKey), Value: cdc.MustMarshal(cctx)},
+        {Key: types.KeyPrefix(types.CCTXKey), Value: cdc.MustMarshal(&cctx)},
         // ... similar changes for other pairs
     },
 }

---

54-60: Consider adding timeout protection and parallel execution support.

The test execution is correct but could be enhanced:

1. Add test timeout protection
2. Enable parallel test execution where appropriate

 for i, tt := range tests {
     i, tt := i, tt
     t.Run(tt.name, func(t *testing.T) {
+        t.Parallel() // Enable parallel execution
+        timer := time.NewTimer(5 * time.Second)
+        done := make(chan struct{})
+        go func() {
             require.Equal(t, tt.expectedLog, dec(kvPairs.Pairs[i], kvPairs.Pairs[i]))
+            close(done)
+        }()
+        select {
+        case <-timer.C:
+            t.Fatal("Test timeout")
+        case <-done:
+        }
     })
 }

testutil/keeper/mocks/fungible/bank.go (1)

70-88: LGTM with a minor suggestion for improvement.

The implementation correctly handles nil cases for the Coins type, which is necessary since it's a slice. However, we can make it more idiomatic by simplifying the nil check.

Consider this more idiomatic approach:

 func (_m *FungibleBankKeeper) SpendableCoins(ctx types.Context, addr types.AccAddress) types.Coins {
 	ret := _m.Called(ctx, addr)
 
 	if len(ret) == 0 {
 		panic("no return value specified for SpendableCoins")
 	}
 
 	var r0 types.Coins
 	if rf, ok := ret.Get(0).(func(types.Context, types.AccAddress) types.Coins); ok {
 		r0 = rf(ctx, addr)
-	} else {
-		if ret.Get(0) != nil {
-			r0 = ret.Get(0).(types.Coins)
-		}
+	} else if ret.Get(0) != nil {
+		r0 = ret.Get(0).(types.Coins)
 	}
 
 	return r0
 }

x/crosschain/simulation/decoders.go (2)

13-15: Enhance function documentation

Consider expanding the documentation to include:

• The format of the returned string
• Possible panic conditions
• Examples of usage in simulation context

 // NewDecodeStore returns a decoder function closure that unmarshals the KVPair's
 // Value to the corresponding crosschain types.
+// The returned function compares two KVPairs and returns a formatted string
+// representation of their decoded values. It panics if an invalid key prefix
+// is encountered.
+//
+// Example output format:
+//   "{value1}\n{value2}"

---

17-61: Consider refactoring repeated unmarshal pattern

The current implementation has significant code duplication across cases. Consider extracting the common unmarshal pattern into a generic helper function.

+func decodeKVPair[T any](cdc codec.Codec, kvA, kvB kv.Pair) (T, T) {
+    var valueA, valueB T
+    cdc.MustUnmarshal(kvA.Value, &valueA)
+    cdc.MustUnmarshal(kvB.Value, &valueB)
+    return valueA, valueB
+}

 func NewDecodeStore(cdc codec.Codec) func(kvA, kvB kv.Pair) string {
     return func(kvA, kvB kv.Pair) string {
         switch {
         case bytes.Equal(kvA.Key, types.KeyPrefix(types.CCTXKey)):
-            var cctxA, cctxB types.CrossChainTx
-            cdc.MustUnmarshal(kvA.Value, &cctxA)
-            cdc.MustUnmarshal(kvB.Value, &cctxB)
+            cctxA, cctxB := decodeKVPair[types.CrossChainTx](cdc, kvA, kvB)
             return fmt.Sprintf("%v\n%v", cctxA, cctxB)

testutil/sample/sample.go (1)

64-67: Consider making byte length configurable.

Following the pattern of StringRandom, consider adding a length parameter to make the function more flexible for different testing scenarios.

-func RandomBytes(r *rand.Rand) []byte {
+func RandomBytes(r *rand.Rand, length int) []byte {
     b := make([]byte, 10)
     _, _ = r.Read(b)
     return b
 }

This would provide more utility for various testing scenarios while maintaining consistency with other functions in the package like StringRandom.

testutil/keeper/emissions.go (1)

57-58: LGTM! Consider documenting the new dependencies.

The addition of BankKeeper and AuthKeeper dependencies to the observer keeper initialization is well-structured and maintains consistency with the broader architectural changes.

Consider adding a comment above the initObserverKeeper call to document these new dependencies and their purpose:

+	// Initialize observer keeper with banking and authentication capabilities
 	observerKeeperTmp := initObserverKeeper(

x/observer/simulation/decoders_test.go (3)

34-34: Remove or document commented code.

Commented code can lead to confusion and maintenance issues. Either remove the commented line or add a comment explaining why it's temporarily disabled.

---

16-39: Consider refactoring test data setup.

The test data setup could be more maintainable by using a table-driven approach for sample data generation. This would make it easier to add or modify test cases in the future.

Example refactor:

type testData struct {
    name string
    generator func() interface{}
}

testInputs := []testData{
    {"crosschainFlags", func() interface{} { return sample.CrosschainFlags() }},
    {"lastBlockObserverCount", func() interface{} { return sample.LastObserverCount(10) }},
    // ... other test data
}

sampleData := make(map[string]interface{})
for _, td := range testInputs {
    sampleData[td.name] = td.generator()
}

---

82-88: Add more comprehensive test assertions.

While the current test execution is correct, consider adding:

1. Validation that the decoder returns expected types
2. Boundary testing with empty or nil values
3. Performance benchmarks for the decoder

Example additions:

t.Run(tt.name, func(t *testing.T) {
    t.Parallel()
    
    result := dec(kvPairs.Pairs[i], kvPairs.Pairs[i])
    require.Equal(t, tt.expectedLog, result)
    
    // Additional validations
    decoded := cdc.MustUnmarshal(kvPairs.Pairs[i].Value, &types.YourType{})
    require.NotNil(t, decoded)
    require.IsType(t, &types.YourType{}, decoded)
})

x/crosschain/keeper/msg_server_vote_inbound_tx.go (1)

Line range hint 96-108: Enhance documentation and error handling for ballot finalization logic.

While the early return pattern is good, consider these improvements:

1. The comment could be more descriptive about why we return early and what "commit state" means.
2. The error from ValidateInbound could benefit from more context in the error wrapping.

Consider this enhancement:

-	// If the ballot is not finalized return nil here to add vote to commit state
+	// Return early if the ballot is not finalized, allowing the vote to be persisted
+	// in the commit state without proceeding to validation and processing
 	if !finalized {
 		return &types.MsgVoteInboundResponse{}, nil
 	}

 	cctx, err := k.ValidateInbound(ctx, msg, true)
 	if err != nil {
-		return nil, sdkerrors.Wrap(err, voteInboundID)
+		return nil, sdkerrors.Wrapf(err, "%s: inbound validation failed for hash %s", 
+			voteInboundID, msg.InboundHash)
 	}

Consider breaking down the VoteInbound function into smaller, more focused functions to improve maintainability:

1. Ballot voting logic
2. Validation logic
3. State persistence logic

x/fungible/module.go (1)

Line range hint 82-85: Improve error handling in RegisterGRPCGatewayRoutes.

The current error handling uses fmt.Println which is not suitable for production code. Consider proper error propagation or structured logging.

func (AppModuleBasic) RegisterGRPCGatewayRoutes(clientCtx client.Context, mux *runtime.ServeMux) {
-	err := types.RegisterQueryHandlerClient(context.Background(), mux, types.NewQueryClient(clientCtx))
-	if err != nil {
-		fmt.Println("RegisterQueryHandlerClient err: %w", err)
-	}
+	if err := types.RegisterQueryHandlerClient(context.Background(), mux, types.NewQueryClient(clientCtx)); err != nil {
+		// Consider using your application's logger or error handling mechanism
+		clientCtx.Logger.Error("failed to register query handler client", "err", err)
+	}
}

x/observer/module.go (1)

34-34: Appropriate codec interface upgrade.

The change from codec.BinaryCodec to codec.Codec is a good architectural decision as it provides more flexibility in encoding/decoding operations while maintaining backward compatibility.

This change aligns with Cosmos SDK's best practices by using the more generic codec.Codec interface, which supports both binary and JSON encoding methods, making the module more versatile for future encoding requirements.

x/fungible/keeper/v2_deposits_test.go (3)

Line range hint 19-115: Consider enhancing test helper coverage

The helper functions are well-structured and documented. However, consider adding table-driven tests to cover edge cases, particularly for:

• Invalid contract addresses
• Zero amounts
• Malformed messages

Example structure:

func TestAssertTestDAppV2MessageAndAmount(t *testing.T) {
    tests := []struct {
        name           string
        contract      common.Address
        message       string
        amount        int64
        expectError   bool
    }{
        {"valid case", validAddr, "test", 100, false},
        {"zero address", common.Address{}, "test", 100, true},
        {"zero amount", validAddr, "test", 0, false},
    }
    // ... test execution
}

---

Line range hint 117-283: Enhance test coverage and reduce duplication

While the test cases are comprehensive for positive scenarios, consider the following improvements:

1. Extract common setup code:

func setupTestEnvironment(t *testing.T) (
    k *keeper.Keeper,
    ctx sdk.Context,
    chainID uint64,
    zrc20 common.Address,
) {
    k, ctx, sdkk, _ := keepertest.FungibleKeeper(t)
    _ = k.GetAuthKeeper().GetModuleAccount(ctx, types.ModuleName)
    chainID = chains.DefaultChainsList()[0].ChainId
    deploySystemContracts(t, ctx, k, sdkk.EvmKeeper)
    zrc20 = setupGasCoin(t, ctx, k, sdkk.EvmKeeper, chainID, "foobar", "foobar")
    return
}

2. Add negative test cases:

t.Run("should fail with invalid zrc20 address", func(t *testing.T) {...})
t.Run("should fail with insufficient balance", func(t *testing.T) {...})
t.Run("should fail with invalid chain ID", func(t *testing.T) {...})

3. Consider using test tables for input variations:

tests := []struct {
    name        string
    sender      []byte
    chainID     uint64
    amount      *big.Int
    message     []byte
    coinType    coin.CoinType
    wantCall    bool
    wantErr     bool
}{
    // ... test cases
}

---

Test coverage needs improvement for error scenarios

The test suite for ProcessV2Deposit lacks coverage for important error cases:

• Missing test for ZETA asset deposit rejection
• No tests for invalid coin types or edge cases
• Error handling paths are not fully covered

The current test suite covers the happy paths well with four test cases:

• No-call deposit
• No-call deposit with ignored message
• Deposit with contract call
• Deposit with contract call and no message

However, it should be extended to include error scenarios, particularly the ZETA asset rejection case that's explicitly handled in the implementation. Consider adding test cases for:

• ZETA asset deposits (should fail)
• Invalid/unsupported coin types
• Edge cases with zero amounts or invalid addresses

🔗 Analysis chain

Line range hint 1-283: Verify test coverage metrics

The test implementation is solid and follows good testing practices. To ensure comprehensive coverage:

🏁 Scripts executed

The following scripts were executed for the analysis:

Script:

#!/bin/bash
# Description: Verify test coverage for the fungible module
# Expected: High coverage for deposit processing logic

# Check test coverage
go test -coverprofile=coverage.out ./x/fungible/keeper/
go tool cover -func=coverage.out | grep -E "ProcessV2Deposit|Total:"

Length of output: 268

---

Script:

#!/bin/bash
# Let's verify the test coverage by analyzing the test cases and their implementation
# First, check for the implementation of ProcessV2Deposit
ast-grep --pattern 'func (k *Keeper) ProcessV2Deposit($$$) ($$$)'

# Then check for all test cases
rg "TestKeeper_ProcessV2Deposit" -A 2

Length of output: 343

---

Script:

#!/bin/bash
# Check for any other tests that might be testing the same functionality
rg "ProcessV2Deposit" -B 1 -A 1

Length of output: 1619

---

Script:

#!/bin/bash
# Verify test scenarios coverage
ast-grep --pattern 'func TestKeeper_ProcessV2Deposit($$$) {
  $$$
}'

Length of output: 10321

---

Script:

#!/bin/bash
# Let's verify the implementation to ensure all test cases cover the main functionality
ast-grep --pattern 'func (k Keeper) ProcessV2Deposit($$$) {
  $$$
}'

# Also check for any error cases in the implementation
rg "return.*error" -B 2 x/fungible/keeper/v2_deposits.go

Length of output: 388

testutil/keeper/observer.go (1)

112-113: Consider adding mock options for bank and auth keepers.

While the implementation is correct, consider extending the ObserverMockOptions structure to include options for mocking bank and auth keepers, maintaining consistency with other keeper mocks.

 type ObserverMockOptions struct {
     UseStakingMock     bool
     UseSlashingMock    bool
     UseAuthorityMock   bool
     UseLightclientMock bool
+    UseBankMock        bool
+    UseAuthMock        bool
 }

 var (
     ObserverMocksAll = ObserverMockOptions{
         UseStakingMock:     true,
         UseSlashingMock:    true,
         UseAuthorityMock:   true,
         UseLightclientMock: true,
+        UseBankMock:        true,
+        UseAuthMock:        true,
     }
     ObserverNoMocks = ObserverMockOptions{}
 )

Also applies to: 135-136

app/modules.go (1)

Issue #3007 referenced in the TODO comment does not exist, and the existing issue #3021 is unrelated to gov module simulation

The TODO comment references a non-existent issue (#3007) for enabling gov module simulation. This could lead to the task being overlooked. Consider either:

• Creating a new issue specifically for enabling gov module simulation
• Updating the TODO comment with the correct issue number if one exists

🔗 Analysis chain

Line range hint 166-174: Consider creating a tracking issue for enabling gov module simulation.

The TODO comment indicates that gov module simulation needs to be enabled. To ensure this doesn't get overlooked, consider creating a dedicated issue if #3007 doesn't already cover this specific task.

---

Let me search for the TODO comment about gov module simulation to verify this concern.

🏁 Scripts executed

The following scripts were executed for the analysis:

Script:

#!/bin/bash
# Check if issue #3007 covers enabling gov module simulation
gh issue view 3007

Length of output: 1387

---

Script:

#!/bin/bash
# Search for TODO comments related to gov module simulation
rg -i "todo.*gov.*simulation" -A 2

Length of output: 196

testutil/sample/observer.go (3)

Line range hint 124-137: Consider improving error handling and magic numbers.

A few suggestions to enhance the code:

1. Consider using t *testing.T parameter instead of panic for better test failure reporting
2. Extract magic numbers (1000) into named constants with clear intent

-func Tss() types.TSS {
+const (
+    defaultFinalizedHeight = 1000 // Initial finalized height for test TSS
+    defaultKeyGenHeight   = 1000 // Initial key generation height for test TSS
+)
+
+func Tss(t *testing.T) types.TSS {
 	_, pubKey, _ := testdata.KeyTestPubAddr()
 	spk, err := cosmos.Bech32ifyPubKey(cosmos.Bech32PubKeyTypeAccPub, pubKey)
 	if err != nil {
-		panic(err)
+		t.Fatalf("failed to bech32ify pubkey: %v", err)
 	}
 	pk, err := zetacrypto.NewPubKey(spk)
 	if err != nil {
-		panic(err)
+		t.Fatalf("failed to create new pubkey: %v", err)
 	}
 	pubkeyString := pk.String()
 	return types.TSS{
 		TssPubkey:           pubkeyString,
-		FinalizedZetaHeight: 1000,
-		KeyGenZetaHeight:    1000,
+		FinalizedZetaHeight: defaultFinalizedHeight,
+		KeyGenZetaHeight:    defaultKeyGenHeight,
 	}
}

---

Line range hint 139-147: Update function signature to match Tss() changes.

If the suggested changes to Tss() are implemented, this function should be updated accordingly.

-func TssList(n int) (tssList []types.TSS) {
+func TssList(t *testing.T, n int) (tssList []types.TSS) {
 	for i := 0; i < n; i++ {
-		tss := Tss()
+		tss := Tss(t)
 		tss.FinalizedZetaHeight = tss.FinalizedZetaHeight + int64(i)
 		tss.KeyGenZetaHeight = tss.KeyGenZetaHeight + int64(i)
 		tssList = append(tssList, tss)

---

Line range hint 149-154: Consider parameterizing the sample index.

The hardcoded "sampleIndex" could be made configurable for more flexible testing scenarios.

-func TssFundsMigrator(chainID int64) types.TssFundMigratorInfo {
+func TssFundsMigrator(chainID int64, index string) types.TssFundMigratorInfo {
 	return types.TssFundMigratorInfo{
 		ChainId:            chainID,
-		MigrationCctxIndex: "sampleIndex",
+		MigrationCctxIndex: index,
 	}
}

testutil/keeper/fungible.go (1)

Line range hint 1-266: Consider enhancing documentation and type safety.

While the implementation is robust, consider these improvements:

1. Add documentation for FungibleMockOptions to explain when each mock should be used
2. Consider using an enum or constants for mock configurations instead of boolean flags

Example improvement:

// MockOptionType defines the type of mock to be used
type MockOptionType int

const (
    // MockNone indicates no mocking should be used
    MockNone MockOptionType = iota
    // MockReal indicates real implementation should be used
    MockReal
    // MockSimulated indicates simulated implementation should be used
    MockSimulated
)

// FungibleMockOptions defines which keepers should be mocked and how
type FungibleMockOptions struct {
    BankKeeper      MockOptionType
    AccountKeeper   MockOptionType
    ObserverKeeper  MockOptionType
    EVMKeeper       MockOptionType
    AuthorityKeeper MockOptionType
}

x/crosschain/keeper/msg_server_vote_inbound_tx_test.go (2)

Line range hint 55-67: Consider improving chain ID initialization logic

The current implementation uses hardcoded chain IDs with a fallback to dynamic selection. This could be simplified and made more maintainable.

Consider refactoring to:

- to, from := int64(1337), int64(101)
- supportedChains := zk.ObserverKeeper.GetSupportedChains(ctx)
- for _, chain := range supportedChains {
-   if chains.IsEVMChain(chain.ChainId, []chains.Chain{}) {
-     from = chain.ChainId
-   }
-   if chains.IsZetaChain(chain.ChainId, []chains.Chain{}) {
-     to = chain.ChainId
-   }
- }
+ supportedChains := zk.ObserverKeeper.GetSupportedChains(ctx)
+ from := supportedChains.FindFirst(chains.IsEVMChain).ChainId
+ to := supportedChains.FindFirst(chains.IsZetaChain).ChainId
+ require.NotZero(t, from, "No EVM chain found in supported chains")
+ require.NotZero(t, to, "No Zeta chain found in supported chains")

---

Line range hint 54-93: Enhance test assertions for successful vote case

While the test covers the basic flow, consider adding assertions for important state changes:

Add these assertions after the existing ones:

// Verify state transitions
require.Equal(t, msg.Amount, cctx.InboundParams.Amount, "Amount mismatch")
require.Equal(t, msg.Sender, cctx.InboundParams.Sender, "Sender mismatch")
require.Equal(t, msg.Receiver, cctx.GetCurrentOutboundParam().Receiver, "Receiver mismatch")

// Verify event emissions
events := ctx.EventManager().Events()
require.True(t, containsEvent(events, "vote_inbound"), "Missing vote_inbound event")

testutil/keeper/crosschain.go (3)

Line range hint 289-307: Consider enhancing MockPayGasAndUpdateCCTX with error handling.

The function sets up multiple mock expectations but doesn't provide a way to test error scenarios. Consider adding parameters to control which operations should fail and how they should fail.

Example enhancement:

 func MockPayGasAndUpdateCCTX(
 	m *crosschainmocks.CrosschainFungibleKeeper,
 	m2 *crosschainmocks.CrosschainObserverKeeper,
 	ctx sdk.Context,
 	k keeper.Keeper,
 	senderChain chains.Chain,
-	asset string,
+	asset string,
+	opts struct {
+		FailGasLimit bool
+		FailDeposit bool
+		CustomError error
+	},
 ) {

---

Line range hint 401-425: Add documentation for mock call sequence dependencies.

The mock ballot voting functions (MockVoteOnOutboundSuccessBallot and MockVoteOnOutboundFailedBallot) are part of a sequence of operations. Consider adding documentation to clarify the order in which these mocks should be called.

Add documentation like:

+// MockVoteOnOutboundSuccessBallot sets up mock expectations for a successful outbound ballot vote.
+// This should be called after setting up the CCTX and before calling the handler being tested.
 func MockVoteOnOutboundSuccessBallot(
 	m *crosschainmocks.CrosschainObserverKeeper,
 	ctx sdk.Context,
 	cctx *types.CrossChainTx,
 	senderChain chains.Chain,
 	observer string,
 ) {

---

Line range hint 466-499: Enhance MockCctxByNonce with input validation.

The function accepts a boolean isErr to control error scenarios, but it could be more explicit about the error conditions and provide validation for the input parameters.

Consider enhancing the function:

 func MockCctxByNonce(
 	t *testing.T,
 	ctx sdk.Context,
 	k keeper.Keeper,
 	observerKeeper *crosschainmocks.CrosschainObserverKeeper,
 	cctxStatus types.CctxStatus,
-	isErr bool,
+	opts struct {
+		ErrorScenario string
+		CustomError error
+	},
 ) {
+	// Validate inputs
+	require.NotNil(t, ctx)
+	require.NotNil(t, k)
+	require.NotNil(t, observerKeeper)

contrib/docker-scripts/start.sh (4)

Line range hint 4-7: Add environment variable validation and error handling.

The script should validate required environment variables and handle errors gracefully. This is particularly important for production environments.

Consider adding these improvements:

 function load_defaults {
+  # Validate required environment variables
+  required_vars=("DAEMON_HOME" "NETWORK" "RESTORE_TYPE")
+  for var in "${required_vars[@]}"; do
+    if [[ -z "${!var}" ]]; then
+      echo "Error: Required environment variable $var is not set"
+      exit 1
+    fi
+  done
+
   #DEFAULT: Mainnet Statesync.
   export DAEMON_HOME=${DAEMON_HOME:=/root/.zetacored}
   export NETWORK=${NETWORK:=mainnet}
   export RESTORE_TYPE=${RESTORE_TYPE:=statesync}

 function init_chain {
+  set -e  # Exit on error
+  trap 'echo "Error: Command failed at line $LINENO"' ERR
+
   if [ -d "${DAEMON_HOME}/config" ]; then
       logt "${DAEMON_NAME} home directory already initialized."
   else
       logt "${DAEMON_NAME} home directory not initialized."
       logt "MONIKER: ${MONIKER}"
       logt "DAEMON_HOME: ${DAEMON_HOME}"
-      ${DAEMON_NAME} init ${MONIKER} --home ${DAEMON_HOME} --chain-id ${CHAIN_ID}
+      if ! ${DAEMON_NAME} init ${MONIKER} --home ${DAEMON_HOME} --chain-id ${CHAIN_ID}; then
+        logt "Failed to initialize chain"
+        exit 1
+      fi
   fi
 }

Also applies to: 73-76

---

Line range hint 78-102: Enhance security for configuration file downloads.

The current implementation downloads configuration files without verifying their integrity, which could expose the system to supply chain attacks.

Consider implementing these security measures:

 function download_configs {
+  # Verify HTTPS certificates
+  CURL_OPTS="--tlsv1.2 --cert-status"
+
   if [ "${NETWORK}" == "mainnet" ]; then
-    wget -q ${APP_TOML_FILE_MAINNET} -O ${DAEMON_HOME}/config/app.toml
-    wget -q ${CONFIG_TOML_FILE_MAINNET} -O ${DAEMON_HOME}/config/config.toml
+    # Download with checksum verification
+    for file in "app.toml" "config.toml" "client.toml" "genesis.json"; do
+      url="https://raw.githubusercontent.com/zeta-chain/network-config/main/mainnet/${file}"
+      checksum_url="${url}.sha256"
+      
+      # Download file and its checksum
+      curl ${CURL_OPTS} -o "${DAEMON_HOME}/config/${file}" "${url}"
+      curl ${CURL_OPTS} -o "/tmp/${file}.sha256" "${checksum_url}"
+      
+      # Verify checksum
+      if ! sha256sum -c "/tmp/${file}.sha256"; then
+        logt "Checksum verification failed for ${file}"
+        exit 1
+      fi
+    done

---

Line range hint 267-290: Improve version comparison and binary verification.

The current version comparison logic could be more robust to handle different version formats and ensure binary integrity.

Consider these improvements:

 function start_network {
+  # Semantic version comparison function
+  version_compare() {
+    if [[ $1 == $2 ]]; then
+      return 0
+    fi
+    local IFS=.
+    local i ver1=($1) ver2=($2)
+    for ((i=${#ver1[@]}; i<${#ver2[@]}; i++)); do
+      ver1[i]=0
+    done
+    for ((i=0; i<${#ver1[@]}; i++)); do
+      if [[ -z ${ver2[i]} ]]; then
+        ver2[i]=0
+      fi
+      if ((10#${ver1[i]} > 10#${ver2[i]})); then
+        return 1
+      fi
+      if ((10#${ver1[i]} < 10#${ver2[i]})); then
+        return 2
+      fi
+    done
+    return 0
+  }

   expected_major_version=$(cat /scripts/expected_major_version | cut -d '-' -f 1)
   VISOR_VERSION=v$(${VISOR_NAME} version | tail -n 1 | tr -d '(devel)' | tr -d '\n')
   DAEMON_VERSION=$(${DAEMON_NAME} version)
-  VISOR_MAJOR_VERSION=$(echo $VISOR_VERSION | grep -o '^v[0-9]*')
-  DAEMON_MAJOR_VERSION=$(echo $DAEMON_VERSION | grep -o '^v[0-9]*')
+  # Extract clean version numbers
+  VISOR_MAJOR_VERSION=$(echo $VISOR_VERSION | sed 's/^v\([0-9]*\.[0-9]*\.[0-9]*\).*/\1/')
+  DAEMON_MAJOR_VERSION=$(echo $DAEMON_VERSION | sed 's/^v\([0-9]*\.[0-9]*\.[0-9]*\).*/\1/')

---

Line range hint 291-299: Enhance network startup configuration and monitoring.

The network startup process uses hardcoded values and lacks proper health checks.

Consider these improvements:

+  # Health check function
+  wait_for_node_ready() {
+    local max_attempts=30
+    local attempt=1
+    while [ $attempt -le $max_attempts ]; do
+      if curl -s "http://localhost:26657/status" > /dev/null; then
+        logt "Node is ready"
+        return 0
+      fi
+      logt "Waiting for node to start... (attempt $attempt/$max_attempts)"
+      sleep 2
+      ((attempt++))
+    done
+    logt "Node failed to start within expected time"
+    return 1
+  }

   ${VISOR_NAME} run start --home ${DAEMON_HOME} \
     --log_level info \
     --moniker ${MONIKER} \
     --rpc.laddr tcp://0.0.0.0:26657 \
-    --minimum-gas-prices 1.0azeta "--grpc.enable=true"
+    --minimum-gas-prices ${MIN_GAS_PRICE:-1.0azeta} \
+    --grpc.enable=true

+  # Wait for node to be ready
+  if ! wait_for_node_ready; then
+    logt "Failed to start node"
+    exit 1
+  fi

simulation/simulation_test.go (5)

46-48: Document the StoreKeysPrefixes struct field rename.

The field rename from Prefixes to SkipPrefixes suggests a change in behavior. Please add a comment explaining the purpose of this field and why certain prefixes are skipped during store comparison.

---

85-87: Consider documenting the test configuration rationale.

The reduction in seeds from 3 to 2 with 5 runs per seed represents a trade-off between test coverage and execution time. Please add a comment explaining this decision to help future maintainers understand the chosen parameters.

---

Line range hint 416-428: Enhance store comparison error reporting.

The current store comparison could benefit from more detailed error reporting. Consider adding debug information about the specific key-value pairs that differ.

-		failedKVAs, failedKVBs := sdk.DiffKVStores(storeA, storeB, skp.SkipPrefixes)
-		require.Equal(t, len(failedKVAs), len(failedKVBs), "unequal sets of key-values to compare")
+		failedKVAs, failedKVBs := sdk.DiffKVStores(storeA, storeB, skp.SkipPrefixes)
+		require.Equal(t, len(failedKVAs), len(failedKVBs), fmt.Sprintf(
+			"store %s: unequal sets of key-values to compare (failed A: %d, failed B: %d)",
+			skp.A.Name(), len(failedKVAs), len(failedKVBs),
+		))

---

549-552: Document AppStateFn parameter usage.

The use of multiple nil parameters followed by exported.AppState needs clarification. Please add a comment explaining why these parameters are nil and how they affect the simulation.

---

Line range hint 1-562: LGTM! Consider improving test organization.

The simulation tests are comprehensive and well-structured. However, consider extracting common setup code into helper functions to reduce duplication across test functions. This would improve maintainability and make the test flow clearer.

testutil/sample/crosschain.go (2)

Line range hint 278-297: Enhance test coverage by improving the InboundVote function.

The function could be improved to handle more test scenarios:

1. The empty Creator field might cause issues in tests where creator validation is required.
2. The hardcoded gas limit might not cover edge cases.

Apply this diff to improve the function:

 func InboundVote(coinType coin.CoinType, from, to int64) types.MsgVoteInbound {
 	return types.MsgVoteInbound{
-		Creator:            "",
+		Creator:            AccAddress(), // Use sample address for better test coverage
 		Sender:             EthAddress().String(),
 		SenderChainId:      Chain(from).ChainId,
 		Receiver:           EthAddress().String(),
 		ReceiverChain:      Chain(to).ChainId,
 		Amount:             UintInRange(10000000, 1000000000),
 		Message:            base64.StdEncoding.EncodeToString(Bytes()),
 		InboundBlockHeight: Uint64InRange(1, 10000),
 		CallOptions: &types.CallOptions{
-			GasLimit: 1000000000,
+			GasLimit: Uint64InRange(21000, 1000000000), // Vary gas limit for better coverage
 		},
 		InboundHash: Hash().String(),
 		CoinType:    coinType,
 		TxOrigin:    EthAddress().String(),
-		Asset:       "",
+		Asset:       StringRandom(Rand(), 32), // Add random asset for better coverage
 		EventIndex:  EventIndex(),
 	}
 }

---

Line range hint 278-320: Improve documentation and error scenario coverage.

The new functions would benefit from:

1. Better documentation explaining the relationship between from and to chain parameters
2. Test cases for error scenarios (e.g., invalid chain IDs)

Add comprehensive documentation:

+// InboundVote creates a sample inbound vote message for testing cross-chain transactions.
+// Parameters:
+// - coinType: The type of coin being transferred
+// - from: Source chain ID for the transaction
+// - to: Destination chain ID for the transaction
+// Returns a MsgVoteInbound with randomized but valid data for testing happy paths.
 func InboundVote(coinType coin.CoinType, from, to int64) types.MsgVoteInbound {

+// InboundVoteSim creates a simulated inbound vote message for testing cross-chain transactions.
+// It uses the provided random source to generate deterministic but random-looking test data.
+// Parameters:
+// - coinType: The type of coin being transferred
+// - from: Source chain ID for the transaction
+// - to: Destination chain ID for the transaction
+// - r: Random source for generating deterministic test data
+// Returns a MsgVoteInbound with deterministic random data for simulation testing.
 func InboundVoteSim(coinType coin.CoinType, from, to int64, r *rand.Rand) types.MsgVoteInbound {

changelog.md (1)

11-11: LGTM! Consider enhancing the description.

The changelog entry is well-formatted and correctly placed under the "Tests" section. The description accurately reflects the PR's purpose.

Consider expanding the description to provide more context about the simulation tests' scope and purpose:

-* [3095](https://github.com/zeta-chain/node/pull/3095) - initialize simulation tests for custom zetachain modules
+* [3095](https://github.com/zeta-chain/node/pull/3095) - initialize simulation tests for custom zetachain modules to validate module interactions and state transitions

x/observer/simulation/operations.go (5)

20-20: Correct the typo in the comment

There's a typographical error in the comment: "100 seems to the max weight used" should be "100 seems to be the max weight used".

Apply this diff to fix the typo:

- // Based on the weights assigned in the cosmos sdk modules , 100 seems to the max weight used, and therefore guarantees that at least one operation of that type is present in a block.
+ // Based on the weights assigned in the Cosmos SDK modules, 100 seems to be the max weight used, and therefore guarantees that at least one operation of that type is present in a block.

---

21-22: Address the TODO comment or remove it

The code contains a TODO comment indicating that more details should be added about what the number represents in terms of the percentage of operations in a block. Please provide the necessary clarification or remove the TODO if it's no longer applicable.

Would you like assistance in enhancing the comment to explain how the operation weight affects the simulation?

---

26-26: Fix the typographical error in the comment

There is a typographical error: "We ues a high weight" should be "We use a high weight".

Apply this diff to correct the typo:

- // DefaultWeightMsgTypeMsgEnableCCTX We ues a high weight for this operation
+ // DefaultWeightMsgTypeMsgEnableCCTX: We use a high weight for this operation

---

85-85: Optimize encoding configuration initialization

Currently, TxGen is initialized with a new encoding configuration in each operation. To improve performance, consider initializing the encoding configuration once outside the function and reusing it.

For example, initialize TxGen once and pass it as a parameter:

// Outside the function
encodingConfig := moduletestutil.MakeTestEncodingConfig()
txGen := encodingConfig.TxConfig

// Modify the function signature to accept txGen
func SimulateMsgTypeMsgEnableCCTX(k keeper.Keeper, txGen client.TxConfig) simtypes.Operation {
    // ...
    txCtx := simulation.OperationInput{
        // ...
-       TxGen:         moduletestutil.MakeTestEncodingConfig().TxConfig,
+       TxGen:         txGen,
        // ...
    }
    // ...
}

---

92-92: Ensure consistent naming for BankKeeper field

The field Bankkeeper should be renamed to BankKeeper to adhere to Go naming conventions and ensure consistency.

Apply this diff to correct the field name:

-    Bankkeeper:    k.GetBankKeeper(),
+    BankKeeper:    k.GetBankKeeper(),

simulation/state.go (2)

140-143: Log errors when obtaining account addresses from operator addresses

The errors encountered in GetAccAddressFromOperatorAddress are ignored using continue, which may obscure underlying issues during simulation. For improved observability and debugging, consider logging these errors.

Apply the following change to log the errors:

 if err != nil {
+    fmt.Printf("Warning: Failed to convert operator address %s to account address: %v\n", validator.OperatorAddress, err)
     continue
 }

Ensure the fmt package is imported.

---

179-202: Review the assignment of all policies to a single random account

Assigning all policy groups to a single random account may not reflect realistic authority distributions and could affect the validity of simulation outcomes. It is advisable to assign different policy groups to separate accounts to better simulate diverse administrative roles.

x/crosschain/simulation/operations.go (2)

28-29: Complete the TODO: Elaborate on operation weight percentages

The comment suggests adding more details about what the numbers represent regarding the percentage of operations in a block. Providing this information will enhance code clarity and assist future maintainers.

---

215-216: Address the TODO: Implement randomization of test values

Currently, the values used for CCTX creation are constant. Introducing randomization will improve the robustness and coverage of the simulation tests by simulating a wider range of scenarios.

Would you like assistance in implementing randomized values for these test parameters?

Configuration used: .coderabbit.yaml
Review profile: CHILL

#!/bin/bash
# Check for test coverage of RandomizedGenState
rg -A 5 "func TestRandomizedGenState" "x/fungible/simulation/"

#!/bin/bash
# Let's first check if the file exists and its content
fd "module_simulation.go" --type f

# Check for any test files related to simulation
fd "simulation.*test.go" --type f

# Let's also check for RandomizedGenState usage across the codebase
rg -A 5 "RandomizedGenState" 

#!/bin/bash
# Check the implementation of WeightedOperations
ast-grep --pattern 'func WeightedOperations($params, $cdc, $keeper) {
  $$$
}'

#!/bin/bash
# Search for WeightedOperations function in simulation package
rg -A 10 "func WeightedOperations" x/fungible/simulation/

# Find all files in simulation directory to understand structure
fd . x/fungible/simulation/

# Search for any usage of AppParams, Cdc, and keeper in simulation files
rg "AppParams|Cdc|keeper" x/fungible/simulation/

#!/bin/bash
# Description: Verify the WeightedOperations implementation coverage
# Expected: Should find comprehensive operation definitions

# Look for operation definitions in the simulation package
rg -A 10 'func WeightedOperations' simulation/

# Check for different operation types
rg -l 'NewWeightedOperation' simulation/

#!/bin/bash
# Let's try a broader search to understand the simulation operations structure

# First, find all simulation-related files
fd simulation

# Then look for operation-related code patterns
rg -A 5 "type.*Operation" 

# Search for weighted operation implementations
rg -A 5 "WeightedOperation" 

# Look specifically in the crosschain module
fd . x/crosschain -t f | xargs rg -l "Operation"

#!/bin/bash
# Let's examine the crosschain simulation operations in detail

# Look at the operations implementation
rg -A 10 'func WeightedOperations' x/crosschain/simulation/operations.go

# Check the operation weights and their initialization
rg -A 5 'weight.*int' x/crosschain/simulation/operations.go

# Look for simulation operation implementations
rg -A 5 'func Simulate' x/crosschain/simulation/operations.go

#!/bin/bash
# Search for Keygen field usage in state migrations and upgrade handlers
rg -A 5 "Keygen" --type go

#!/bin/bash
# Search for state transitions involving Keygen
ast-grep --pattern 'func $_(ctx $_, keygen $_, $$$) {
  $$$
}'

#!/bin/bash
# Search for Keygen initialization and state transitions
rg -A 5 "SetKeygen.*Keygen\{" --type go

#!/bin/bash
# Search for Keygen struct definition and genesis state handling
rg -A 10 "type Keygen struct" --type go
rg -A 10 "DefaultGenesis.*return.*Genesis" --type go

#!/bin/bash
# Search for DefaultGenesis in observer module
rg -A 10 "func DefaultGenesis" x/observer/types/

#!/bin/bash
# Description: Verify that the mock implementation matches the interface definition
# Expected: The GetAccount method signature in the interface should match the mock implementation

# Search for the interface definition
ast-grep --pattern 'type AccountKeeper interface {
  $$$
  GetAccount(ctx sdk.Context, addr sdk.AccAddress) types.AccountI
  $$$
}'

#!/bin/bash
# Description: Verify interface method implementations and usage
# Check for SpendableCoins implementation
rg -A 2 "SpendableCoins.*sdk\.Context.*sdk\.AccAddress.*sdk\.Coins"

# Check for GetPolicies implementation
rg -A 2 "GetPolicies.*sdk\.Context.*authoritytypes\.Policies"

#!/bin/bash
# Description: Check usage patterns of FungibleAuthorityKeeper mock
# Expected: Find test files using this mock and verify GetPolicies usage

# Find test files using FungibleAuthorityKeeper
echo "Searching for test files using FungibleAuthorityKeeper mock..."
rg -l "FungibleAuthorityKeeper" --type go --glob "*_test.go"

# Check GetPolicies usage patterns
echo -e "\nChecking GetPolicies usage patterns..."
rg "GetPolicies" --type go --glob "*_test.go" -A 3

GetPolicies(ctx sdk.Context) (val authoritytypes.Policies, found bool)

#!/bin/bash
# Description: Verify that the mock implementation matches the interface definition
# Expected: The interface should define GetPolicies with the same signature

# Search for the interface definition
ast-grep --pattern 'type AuthorityKeeper interface {
  $$$
  GetPolicies(ctx sdk.Context) (val authoritytypes.Policies, found bool)
  $$$
}'

const (
    // Deprecated: Use BallotKey instead. Will be removed in version X.Y.Z
    VoterKey = "Voter-value-"
    // New key name for improved clarity
    BallotKey = VoterKey
)

#!/bin/bash
# Search for any special handling of FinalizedInbounds in the codebase
rg -A 5 "FinalizedInboundsKey" 

#!/bin/bash
# Check the handling of other keys in the decoder
ast-grep --pattern 'case bytes.Equal(kvA.Key, types.KeyPrefix($_)) {
  $$$
}'

#!/bin/bash
# Get the full decoder implementation to compare handling of different keys
rg -A 20 "func NewDecodeStore" x/crosschain/simulation/decoders.go

#!/bin/bash
# Search for FinalizedInbounds type definition and usage
rg -g '*.go' -A 5 "type.*FinalizedInbound" x/crosschain/

#!/bin/bash
# Description: Verify observer keeper initialization consistency

# Test 1: Check if initObserverKeeper function signature matches the new parameters
echo "Checking initObserverKeeper function signature..."
ast-grep --pattern 'func initObserverKeeper($$$) {$$$}'

# Test 2: Find all files that might need updates for these new dependencies
echo "Finding potential affected test files..."
rg -l "initObserverKeeper" --type go

#!/bin/bash
# Let's examine the actual implementation and usage patterns

# Check the implementation in observer.go
echo "=== Observer Keeper Implementation ==="
rg "func initObserverKeeper" -A 10 testutil/keeper/observer.go

# Check the implementation in emissions.go
echo -e "\n=== Emissions Keeper Implementation ==="
rg "func initObserverKeeper" -A 10 testutil/keeper/emissions.go

# Check the implementation in ibccrosschain.go
echo -e "\n=== IBC Crosschain Implementation ==="
rg "func initObserverKeeper" -A 10 testutil/keeper/ibccrosschain.go

# Look for actual keeper initialization calls
echo -e "\n=== Keeper Initialization Calls ==="
rg "initObserverKeeper\(" -A 2 

#!/bin/bash
# Let's check the actual calls to see if they match the signature

echo "=== Emissions Keeper Call ==="
rg "observerKeeperTmp := initObserverKeeper\(" -A 10 testutil/keeper/emissions.go

echo -e "\n=== IBC Crosschain Keeper Call ==="
rg "observerKeeper := initObserverKeeper\(" -A 10 testutil/keeper/ibccrosschain.go

# Also check for any other potential callers
echo -e "\n=== All Observer Keeper Initialization Patterns ==="
rg "initObserverKeeper\(.*\)" --multiline

#!/bin/bash
# Description: Check if BankKeeper and AuthKeeper are consistently used across test utilities
# Expected: All keeper initializations should follow the same pattern

# Search for other keeper initializations that might need similar updates
rg -g '*.go' -B 2 -A 2 'initObserverKeeper|initFungibleKeeper' testutil/

#!/bin/bash
# Let's examine the implementation of initObserverKeeper and initFungibleKeeper
# to verify the parameter consistency

# Check initObserverKeeper implementation
echo "=== initObserverKeeper implementation ==="
rg -g '*.go' -A 15 '^func initObserverKeeper' testutil/keeper/

# Check initFungibleKeeper implementation
echo -e "\n=== initFungibleKeeper implementation ==="
rg -g '*.go' -A 15 '^func initFungibleKeeper' testutil/keeper/

# Check for any other occurrences of BankKeeper and AuthKeeper in test utilities
echo -e "\n=== BankKeeper and AuthKeeper usage in test utilities ==="
rg -g '*.go' 'BankKeeper|AuthKeeper' testutil/

func (k Keeper) SaveObservedInboundInformation(ctx sdk.Context, cctx *types.CrossChainTx, eventIndex uint64) error {
    // Create a cached context that can be committed or discarded
    tmpCtx, commit := ctx.CacheContext()
    
    EmitEventInboundFinalized(tmpCtx, cctx)
    if err := k.AddFinalizedInbound(tmpCtx, 
        cctx.GetInboundParams().ObservedHash,
        cctx.GetInboundParams().SenderChainId,
        eventIndex); err != nil {
        return err
    }
    
    // Block height is guaranteed to be positive in Cosmos SDK
    cctx.InboundParams.FinalizedZetaHeight = uint64(tmpCtx.BlockHeight())
    cctx.InboundParams.TxFinalizationStatus = types.TxFinalizationStatus_Executed
    
    if err := k.RemoveInboundTrackerIfExists(tmpCtx, 
        cctx.InboundParams.SenderChainId, 
        cctx.InboundParams.ObservedHash); err != nil {
        return err
    }
    
    if err := k.SetCrossChainTx(tmpCtx, *cctx); err != nil {
        return err
    }
    
    // Commit changes only if all operations succeed
    commit()
    return nil
}

#!/bin/bash
# Description: Verify codec usage consistency across the module
# Look for any remaining BinaryCodec usage that might need updating

# Search for BinaryCodec usage
echo "Checking for any remaining BinaryCodec usage in the module:"
rg -l "codec\.BinaryCodec" ./x/fungible/

# Search for codec method calls that might be affected
echo "Checking codec method usage patterns:"
rg "cdc\.(Marshal|Unmarshal|MustMarshal|MustUnmarshal)" ./x/fungible/

#!/bin/bash
# Search for all calls to initObserverKeeper to ensure they include the new parameters
rg "initObserverKeeper\(" --type go

#!/bin/bash
# Check the implementation of initObserverKeeper calls in the found files
rg "initObserverKeeper\(" -A 10 --type go

#!/bin/bash
# Check if issue #3021 covers this specific refactoring task
gh issue view 3021

</details>
<details>
<summary>x/crosschain/types/expected_keepers.go (2)</summary>

`27-27`: **LGTM: Standard Cosmos SDK account query method.**

The addition of `GetAccount` method follows the standard Cosmos SDK pattern for account management and is essential for account-related operations.

---

`34-34`: **LGTM: Standard Cosmos SDK spendable coins query method.**

The addition of `SpendableCoins` method follows the standard Cosmos SDK pattern for balance queries and is essential for transaction validation.

</details>
<details>
<summary>testutil/keeper/crosschain.go (1)</summary>

`132-133`: **LGTM: Keeper initialization enhanced with necessary dependencies.**

The addition of BankKeeper and AuthKeeper to observerKeeperTmp initialization is well-structured and maintains consistency with the module's architecture.

</details>
<details>
<summary>Makefile (1)</summary>

`407-407`: **Parameter reduction appears reasonable but warrants monitoring.**

The reduction in simulation parameters (blocks: 100→50, transactions: 200→100) aligns with the goal of preventing store comparison failures. However, to maintain comprehensive test coverage:

1. Consider implementing additional focused test scenarios that specifically target edge cases that might be missed with reduced parameters.
2. Monitor test effectiveness over time to ensure the reduced parameters continue to provide adequate coverage.


Let's verify the simulation test configuration across the codebase:

<details>
<summary>✅ Verification successful</summary>

Let me gather more information about the simulation configuration to better understand the test coverage.

---

**Parameter reduction is appropriate and well-balanced**

The simulation test configuration appears to be part of a comprehensive test suite that includes multiple test scenarios (`TestFullAppSimulation`, `TestAppImportExport`, `TestAppSimulationAfterImport`). The parameter reduction to 50 blocks and 100 transactions maintains a reasonable balance between test coverage and computational efficiency, especially considering:

1. The test suite includes multiple simulation scenarios that collectively provide coverage from different angles
2. The parameters are still substantial enough to exercise state transitions and cross-module interactions
3. The configuration is consistently applied across all simulation tests



</details>

<details>
<summary>🏁 Scripts executed</summary>

The following scripts were executed for the analysis:

Script:

```shell
#!/bin/bash
# Description: Check for other simulation test configurations that might need adjustment
# and verify the presence of additional test scenarios.

# Search for simulation test configurations
echo "Searching for simulation test configurations..."
rg -A 5 "TestAppImportExport|TestFullAppSimulation|TestAppSimulationAfterImport" --type go

# Look for focused test scenarios
echo "Checking for focused test scenarios..."
rg -A 5 "func.*Test.*Simulation" --type go

#!/bin/bash
# Check for simulation configuration flags and parameters
echo "Checking simulation configuration..."
rg -A 10 "NewConfigFromFlags" --type go

# Look for any custom simulation operations or test scenarios
echo "Checking custom simulation operations..."
rg -A 5 "WeightedOperations|TestingApp" --type go

# Check for any simulation constants or default values
echo "Checking simulation constants..."
rg "const.*Sim|var.*Sim" --type go