Revert "rpc: marshal fees and GAS as Fixed8 decimal"

This reverts commit a79b12b4d4.

pkg/rpc/response/result/invoke.go

@@ -6,7 +6,6 @@ import (
 
 	"github.com/nspcc-dev/neo-go/pkg/config/netmode"
 	"github.com/nspcc-dev/neo-go/pkg/core/transaction"
-	"github.com/nspcc-dev/neo-go/pkg/encoding/fixedn"
 	"github.com/nspcc-dev/neo-go/pkg/vm/stackitem"
 )
 
@@ -26,7 +25,7 @@ type Invoke struct {
 
 type invokeAux struct {
 	State          string          `json:"state"`
-	GasConsumed    fixedn.Fixed8   `json:"gasconsumed"`
+	GasConsumed    int64           `json:"gasconsumed,string"`
 	Script         []byte          `json:"script"`
 	Stack          json.RawMessage `json:"stack"`
 	FaultException string          `json:"exception,omitempty"`
@@ -55,7 +54,7 @@ func (r Invoke) MarshalJSON() ([]byte, error) {
 	}
 
 	return json.Marshal(&invokeAux{
-		GasConsumed:    fixedn.Fixed8(r.GasConsumed),
+		GasConsumed:    r.GasConsumed,
 		Script:         r.Script,
 		State:          r.State,
 		Stack:          st,
@@ -83,7 +82,7 @@ func (r *Invoke) UnmarshalJSON(data []byte) error {
 			r.Stack = st
 		}
 	}
-	r.GasConsumed = int64(aux.GasConsumed)
+	r.GasConsumed = aux.GasConsumed
 	r.Script = aux.Script
 	r.State = aux.State
 	r.FaultException = aux.FaultException

pkg/rpc/response/result/invoke_test.go

@@ -25,7 +25,7 @@ func TestInvoke_MarshalJSON(t *testing.T) {
 	require.NoError(t, err)
 	expected := `{
 		"state":"HALT",
-		"gasconsumed":"2.37626",
+		"gasconsumed":"237626000",
 		"script":"` + base64.StdEncoding.EncodeToString(result.Script) + `",
 		"stack":[
 			{"type":"Integer","value":"1"}