diff --git a/submission.go b/submission.go
new file mode 100644
index 0000000..6bb726f
--- /dev/null
+++ b/submission.go
@@ -0,0 +1,159 @@
+package judge0
+
+import(
+	"time"
+	"errors"
+	"encoding/json"
+	"encoding/base64"
+	"strings"
+)
+
+
+type RequestFields struct{
+	
+	SourceCode string `json:"source_code"`
+	LanguageID int `json:"language_id"`
+
+	CompilerOptions *string `json:"compiler_options,omitempty"`
+	CommandLineArguments *string `json:"command_line_arguments,omitempty"`
+	Stdin *string `json:"stdin,omitempty"`
+	ExpectedOutput *string `json:"expected_output,omitempty"`
+	CPUTimeLimit *float64 `json:"cpu_time_limit,omitempty"`
+	CPUExtraTime *float64 `json:"cpu_extra_time,omitempty"`
+	WallTimeLimit *float64 `json:"wall_time_limit,omitempty"`
+	MemoryLimit *float64 `json:"memory_limit,omitempty"`
+	StackLimit	*int `json:"stack_limit,omitempty"`
+	MaxProcessesAndOrThreads *int `json:"max_processes_and_or_threads,omitempty"`
+	EnablePerProcessAndThreadTimeLimit *bool `json:"enable_per_process_and_thread_time_limit,omitempty"`
+	EnablePerProcessAndThreadMemoryLimit *bool `json:"enable_per_process_and_thread_memory_limit,omitempty"`
+	MaxFileSize *int `json:"max_file_size,omitempty"`
+	RedirectStderrToStdout *bool `json:"redirect_stderr_to_stdout,omitempty"`
+	EnableNetwork *bool `json:"enable_network,omitempty"`
+	NumberOfRuns *int `json:"number_of_runs,omitempty"`
+	AdditionalFiles *string `json:"additional_files,omitempty"`
+	CallbackURL *string `json:"callback_url,omitempty"`
+
+}
+
+type ResponseFields struct{
+	
+	Stdout *string `json:"stdout"`
+	Stderr *string `json:"stderr"`
+	CompileOutput *string`json:"compile_output"`
+	Message *string `json:"message"`
+	ExitCode *int `json:"exit_code"`
+	ExitSignal *int `json:"exit_signal"`
+	Status *Status `json:"status"`
+	CreatedAt *time.Time `json:"created_at"`
+	FinishedAt *time.Time `json:"finished_at"`
+	Token *string `json:"token"`
+	Time *float64 `json:"time"`
+	WallTime *float64 `json:"wall_time"`
+	Memory *float64 `json:"memory"`
+
+}
+
+
+type Submission struct {
+
+	Request RequestFields
+	response ResponseFields
+}
+
+
+
+
+func encodeField(field *string){
+
+	if field != nil{
+		*field = base64.StdEncoding.EncodeToString([]byte(*field))
+	}
+}
+
+
+func decodeField(field *string) error{
+	if field != nil{
+		temp, err := base64.StdEncoding.DecodeString(*field)
+		if err!=nil{
+			return err
+		}
+		*field=string(temp)
+	}
+	return nil
+}
+
+
+
+
+
+
+func (req *RequestFields) isValid() error{
+
+	if strings.TrimSpace(req.SourceCode)==""{
+		return errors.New("source_code is required")
+	}
+
+	if req.LanguageID<=0{ 
+		return errors.New("invalid language_id")
+	}
+
+	return nil
+
+}
+
+
+func (request *RequestFields) asBody() ([]byte, error){
+
+	req := *request
+
+	err := req.isValid()
+	if err!=nil{
+		return nil, err
+	}
+
+	encodeField(&req.SourceCode)
+	encodeField(req.Stdin)
+	encodeField(req.AdditionalFiles)
+	encodeField(req.ExpectedOutput)
+	
+	dat, err := json.Marshal(req)
+	if err!=nil{
+		return nil, err
+	}
+
+
+	return dat, nil
+}
+
+
+
+
+
+
+func (resp *ResponseFields) decodeResponse() (*ResponseFields, error){
+
+	res := *resp
+
+	var err error
+
+	err = decodeField(res.Stdout)
+	if err!=nil{
+		return nil, err
+	}
+	
+	err = decodeField(res.Stderr)
+	if err!=nil{
+		return nil, err
+	}
+	
+	err = decodeField(res.CompileOutput)	
+	if err!=nil{
+		return nil, err
+	}
+
+	return &res, nil
+
+}
+
+
+