chore: add max int 64 validation for HeaderHashNum and HistoryServeWindow (#795)

Author: randy-cro

CHANGELOG.md

@@ -45,6 +45,7 @@ Ref: https://keepachangelog.com/en/1.0.0/
 * (rpc) [#764](https://github.com/crypto-org-chain/ethermint/pull/764) rpc: apply state overrides to eth_estimateGas
 * (ante) [#775](https://github.com/crypto-org-chain/ethermint/pull/775) fix: race condition in antecache
 * (ante) [#789](https://github.com/crypto-org-chain/ethermint/pull/789) fix: add check on evm transaction tip
+* (evm) [#789](https://github.com/crypto-org-chain/ethermint/pull/795) chore: add validation for HeaderHashNum and HistoryServeWindow in params
 
 ## [v0.22.0] - 2025-08-12
 

x/evm/types/params.go

@@ -17,6 +17,7 @@ package types
 
 import (
 	"fmt"
+	"math"
 	"math/big"
 
 	sdk "github.com/cosmos/cosmos-sdk/types"
@@ -89,6 +90,14 @@ func (p Params) Validate() error {
 		return err
 	}
 
+	if err := ValidateInt64Overflow(p.HeaderHashNum); err != nil {
+		return err
+	}
+
+	if err := ValidateInt64Overflow(p.HistoryServeWindow); err != nil {
+		return err
+	}
+
 	return ValidateChainConfig(p.ChainConfig)
 }
 
@@ -140,6 +149,17 @@ func ValidateChainConfig(i interface{}) error {
 	return cfg.Validate()
 }
 
+func ValidateInt64Overflow(i interface{}) error {
+	num, ok := i.(uint64)
+	if !ok {
+		return fmt.Errorf("invalid parameter type: %T", i)
+	}
+	if num > math.MaxInt64 {
+		return fmt.Errorf("value too large: %d, maximum value is: %d", num, uint64(math.MaxInt64))
+	}
+	return nil
+}
+
 // IsLondon returns if london hardfork is enabled.
 func IsLondon(ethConfig *params.ChainConfig, height int64) bool {
 	return ethConfig.IsLondon(big.NewInt(height))