evm: add ApplyNativeMessage (#557)

* add ApplyNativeMessage

Closes #533

* fix lint

* Update x/evm/types/tracer.go

Co-authored-by: Federico Kunze Küllmer <31522760+fedekunze@users.noreply.github.com>

* Update x/evm/types/tracer.go

Co-authored-by: Federico Kunze Küllmer <31522760+fedekunze@users.noreply.github.com>

* no-op tracer

Co-authored-by: Federico Kunze Küllmer <31522760+fedekunze@users.noreply.github.com>
Co-authored-by: Federico Kunze <federico.kunze94@gmail.com>

x/evm/types/tracer.go

@@ -4,7 +4,9 @@ import (
 	"fmt"
 	"math/big"
 	"os"
+	"time"
 
+	"github.com/ethereum/go-ethereum/common"
 	"github.com/ethereum/go-ethereum/core"
 	"github.com/ethereum/go-ethereum/core/vm"
 	"github.com/ethereum/go-ethereum/params"
@@ -36,7 +38,7 @@ func NewTracer(tracer string, msg core.Message, cfg *params.ChainConfig, height
 	case TracerStruct:
 		return vm.NewStructLogger(logCfg)
 	default:
-		return nil
+		return NewNoOpTracer()
 	}
 }
 
@@ -112,3 +114,28 @@ func FormatLogs(logs []vm.StructLog) []StructLogRes {
 	}
 	return formatted
 }
+
+var _ vm.Tracer = &NoOpTracer{}
+
+// NoOpTracer is an empty implementation of vm.Tracer interface
+type NoOpTracer struct{}
+
+// NewNoOpTracer creates a no-op vm.Tracer
+func NewNoOpTracer() *NoOpTracer {
+	return &NoOpTracer{}
+}
+
+// CaptureStart implements vm.Tracer interface
+func (dt NoOpTracer) CaptureStart(env *vm.EVM, from, to common.Address, create bool, input []byte, gas uint64, value *big.Int) {
+}
+
+// CaptureState implements vm.Tracer interface
+func (dt NoOpTracer) CaptureState(env *vm.EVM, pc uint64, op vm.OpCode, gas, cost uint64, scope *vm.ScopeContext, rData []byte, depth int, err error) {
+}
+
+// CaptureFault implements vm.Tracer interface
+func (dt NoOpTracer) CaptureFault(env *vm.EVM, pc uint64, op vm.OpCode, gas, cost uint64, scope *vm.ScopeContext, depth int, err error) {
+}
+
+// CaptureEnd implements vm.Tracer interface
+func (dt NoOpTracer) CaptureEnd(output []byte, gasUsed uint64, t time.Duration, err error) {}