Add pretty print option

Signed-off-by: Peter Broadhurst <[email protected]>

pkg/abi/outputserialization.go

@@ -32,11 +32,12 @@ import (
 // Serializer contains a set of options for how to serialize an parsed
 // ABI value tree, into JSON.
 type Serializer struct {
-	ts FormattingMode
-	is IntSerializer
-	fs FloatSerializer
-	bs ByteSerializer
-	dn DefaultNameGenerator
+	ts     FormattingMode
+	is     IntSerializer
+	fs     FloatSerializer
+	bs     ByteSerializer
+	dn     DefaultNameGenerator
+	pretty bool
 }
 
 // NewSerializer creates a new ABI value tree serializer, with the default
@@ -106,6 +107,11 @@ func (s *Serializer) SetDefaultNameGenerator(dn DefaultNameGenerator) *Serialize
 	return s
 }
 
+func (s *Serializer) SetPretty(pretty bool) *Serializer {
+	s.pretty = pretty
+	return s
+}
+
 func Base10StringIntSerializer(i *big.Int) interface{} {
 	return i.String()
 }
@@ -177,6 +183,9 @@ func (s *Serializer) SerializeJSONCtx(ctx context.Context, cv *ComponentValue) (
 	if err != nil {
 		return nil, err
 	}
+	if s.pretty {
+		return json.MarshalIndent(&v, "", "  ")
+	}
 	return json.Marshal(&v)
 }
 

pkg/abi/outputserialization_test.go

@@ -59,6 +59,7 @@ func TestJSONSerializationFormatsTuple(t *testing.T) {
 		SetFormattingMode(FormatAsFlatArrays).
 		SetIntSerializer(HexIntSerializer0xPrefix).
 		SetByteSerializer(HexByteSerializer0xPrefix).
+		SetPretty(true).
 		SerializeJSON(v)
 	assert.NoError(t, err)
 	assert.JSONEq(t, `[
@@ -71,6 +72,7 @@ func TestJSONSerializationFormatsTuple(t *testing.T) {
 			"0xfeedbeef"
 		]
 	]`, string(j2))
+	assert.Contains(t, string(j2), "\n")
 
 	j3, err := NewSerializer().
 		SetFormattingMode(FormatAsSelfDescribingArrays).