cmd/evm: add --trace.tracer.config

Signed-off-by: jsvisa <delweng@gmail.com>

cmd/evm/internal/t8ntool/flags.go

@@ -34,6 +34,10 @@ var (
 		Name:  "trace.tracer",
 		Usage: "Tracer name",
 	}
+	TraceTracerConfigFlag = &cli.StringFlag{
+		Name:  "trace.tracer.config",
+		Usage: "The config of trace.tracer, in JSON encoded format",
+	}
 	TraceDisableMemoryFlag = &cli.BoolFlag{
 		Name:  "trace.nomemory",
 		Value: true,

cmd/evm/internal/t8ntool/transition.go

@@ -125,10 +125,13 @@ func Transition(ctx *cli.Context) error {
 	}
 	if ctx.Bool(TraceFlag.Name) {
 		if ctx.IsSet(TraceTracerFlag.Name) {
-			config := &tracers.TraceConfig{}
+			var config json.RawMessage
-			tracer, err := tracers.DefaultDirectory.New(ctx.String(TraceTracerFlag.Name), nil, config.TracerConfig)
+			if ctx.IsSet(TraceTracerConfigFlag.Name) {
+				config = []byte(ctx.String(TraceTracerConfigFlag.Name))
+			}
+			tracer, err := tracers.DefaultDirectory.New(ctx.String(TraceTracerFlag.Name), nil, config)
 			if err != nil {
-				return NewError(ErrorConfig, fmt.Errorf("%w unknown value of --%s", err, TraceTracerFlag))
+				return NewError(ErrorConfig, fmt.Errorf("can't instantiate a trace instance: %w", err))
 			}
 
 			getTracer = func(txIndex int, txHash common.Hash) (*traceWriter, error) {

cmd/evm/main.go

@@ -148,6 +148,7 @@ var stateTransitionCommand = &cli.Command{
 	Flags: []cli.Flag{
 		t8ntool.TraceFlag,
 		t8ntool.TraceTracerFlag,
+		t8ntool.TraceTracerConfigFlag,
 		t8ntool.TraceDisableMemoryFlag,
 		t8ntool.TraceEnableMemoryFlag,
 		t8ntool.TraceDisableStackFlag,