/
client.go
134 lines (112 loc) · 2.9 KB
/
client.go
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package viettelpay
import (
"bytes"
"context"
"encoding/base64"
"encoding/json"
)
type EnvelopeBase struct {
Password string `json:"password"`
ServiceCode string `json:"serviceCode"`
Username string `json:"username"`
Data []byte `json:"data,omitempty"`
OrderID string `json:"orderId"`
}
func (e *EnvelopeBase) SetData(val []byte) {
e.Data = val
}
func (e *EnvelopeBase) SetUsername(val string) {
e.Username = val
}
func (e *EnvelopeBase) SetPassword(val string) {
e.Password = val
}
func (e *EnvelopeBase) SetServiceCode(val string) {
e.ServiceCode = val
}
type EnvelopeResponse struct {
Data json.RawMessage `json:"data"`
Signature []byte `json:"signature"`
}
type EnvelopeResponseData struct {
Data []byte `json:"data,omitempty"`
OrderID string `json:"orderId"`
RealServiceCode string `json:"realServiceCode"`
ServiceCode string `json:"serviceCode"`
Username string `json:"username"`
RequestId string `json:"requestId"`
TransDate string `json:"transDate"`
BatchErrorCode string `json:"batchErrorCode"`
BatchErrorDesc string `json:"batchErrorDesc"`
ErrorCode string `json:"errorCode"`
ErrorDesc string `json:"errorDesc"`
}
func (e EnvelopeResponseData) CheckError() error {
if e.ErrorCode != "00" {
return &Error{
Code: e.ErrorCode,
Desc: e.ErrorDesc,
}
} else if e.BatchErrorCode != "" {
return &BatchError{
Code: e.BatchErrorCode,
Desc: e.BatchErrorDesc,
}
}
return nil
}
func (s *partnerAPI) Process(ctx context.Context, req Request, result interface{}) error {
passwordEncrypted, err := s.keyStore.Encrypt(([]byte)(s.password))
if err != nil {
return err
}
envReq := req.Envelope()
envReq.SetPassword(passwordEncrypted)
envReq.SetServiceCode(s.serviceCode)
envReq.SetUsername(s.username)
if data := req.Data(); data != nil {
buf := bytes.NewBuffer(nil)
if err = MarshalGzipJSON(buf, data); err != nil {
return err
}
envReq.SetData(buf.Bytes())
}
envReqJSON, err := json.Marshal(envReq)
if err != nil {
return err
}
signature, err := s.keyStore.Sign(envReqJSON)
if err != nil {
return err
}
res, err := s.call(ctx, &Process{
Cmd: req.Command(),
Data: string(envReqJSON),
Signature: base64.StdEncoding.EncodeToString(signature),
})
if err != nil {
return err
}
var envRes EnvelopeResponse
err = json.NewDecoder(bytes.NewBufferString(res.Return_)).
Decode(&envRes)
if err != nil {
return err
}
if err = s.keyStore.Verify(envRes.Data, envRes.Signature); err != nil {
return err
}
var envResData EnvelopeResponseData
if err = json.Unmarshal(envRes.Data, &envResData); err != nil {
return err
}
if data := envResData.Data; data != nil {
// NOTE: VTP also return data in case errors happen.
// So, we unmarshal data first then check error late.
err = UnmarshalGzipJSON(bytes.NewReader(envResData.Data), result)
if err != nil {
return err
}
}
return envResData.CheckError()
}