custom_marshaller

func (CustomMarshaller) MarshalJSON ¶

func (instance CustomMarshaller) MarshalJSON() ([]byte, error)

MarshalJSON iterates over all the fields of the struct allowing custom marshalling of the fields - [32]byte will be marshalled as a common.Hash - [20]byte will be marshalled as a common.Address - []byte will be marshalled as a common.Hash - If the field is a struct or a pointer to a struct, it will be marshalled recursively - All the rest of the fields will be marshalled as is

Example:

type MyStruct struct {
	Field1 string
	Field2 [32]byte
	Field3 [20]byte
	Field4 []byte
}
myStruct := MyStruct{
	Field1: "value",
	Field2: [32]byte{},
	Field3: [20]byte{},
	Field4: []byte{},
}

result, _ := json.Marshal(myStruct)
fmt.Println(string(result))

Result returned when marshalling MyStruct directly:

{
	"Field1": "value",
	"Field2": [0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0],
	"Field3": [0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0],
	"Field4": [0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0]
}

result, _ = json.Marshal(custom_marshaller.New(myStruct))
fmt.Println(string(result))

Result returned when marshalling MyStruct using CustomMarshaller:

{
	"Field1": "value",
	"Field2": "0x0000000000000000000000000000000000000000000000000000000000000000",
	"Field3": "0x0000000000000000000000000000000000000000",
	"Field4": "0x0000000000000000000000000000000000000000000000000000000000000000"
}