160 lines
3.2 KiB
Go
160 lines
3.2 KiB
Go
package rpc
|
|
|
|
import (
|
|
"bytes"
|
|
"encoding/hex"
|
|
"encoding/json"
|
|
"fmt"
|
|
|
|
"github.com/CityOfZion/neo-go/pkg/encoding/address"
|
|
"github.com/CityOfZion/neo-go/pkg/util"
|
|
"github.com/pkg/errors"
|
|
)
|
|
|
|
type (
|
|
// Param represents a param either passed to
|
|
// the server or to send to a server using
|
|
// the client.
|
|
Param struct {
|
|
Type paramType
|
|
Value interface{}
|
|
}
|
|
|
|
paramType int
|
|
// FuncParam represents a function argument parameter used in the
|
|
// invokefunction RPC method.
|
|
FuncParam struct {
|
|
Type StackParamType `json:"type"`
|
|
Value Param `json:"value"`
|
|
}
|
|
)
|
|
|
|
const (
|
|
defaultT paramType = iota
|
|
stringT
|
|
numberT
|
|
arrayT
|
|
funcParamT
|
|
)
|
|
|
|
func (p Param) String() string {
|
|
return fmt.Sprintf("%v", p.Value)
|
|
}
|
|
|
|
// GetString returns string value of the parameter.
|
|
func (p Param) GetString() (string, error) {
|
|
str, ok := p.Value.(string)
|
|
if !ok {
|
|
return "", errors.New("not a string")
|
|
}
|
|
return str, nil
|
|
}
|
|
|
|
// GetInt returns int value of te parameter.
|
|
func (p Param) GetInt() (int, error) {
|
|
i, ok := p.Value.(int)
|
|
if !ok {
|
|
return 0, errors.New("not an integer")
|
|
}
|
|
return i, nil
|
|
}
|
|
|
|
// GetArray returns a slice of Params stored in the parameter.
|
|
func (p Param) GetArray() ([]Param, error) {
|
|
a, ok := p.Value.([]Param)
|
|
if !ok {
|
|
return nil, errors.New("not an array")
|
|
}
|
|
return a, nil
|
|
}
|
|
|
|
// GetUint256 returns Uint256 value of the parameter.
|
|
func (p Param) GetUint256() (util.Uint256, error) {
|
|
s, err := p.GetString()
|
|
if err != nil {
|
|
return util.Uint256{}, err
|
|
}
|
|
|
|
return util.Uint256DecodeStringLE(s)
|
|
}
|
|
|
|
// GetUint160FromHex returns Uint160 value of the parameter encoded in hex.
|
|
func (p Param) GetUint160FromHex() (util.Uint160, error) {
|
|
s, err := p.GetString()
|
|
if err != nil {
|
|
return util.Uint160{}, err
|
|
}
|
|
|
|
return util.Uint160DecodeStringLE(s)
|
|
}
|
|
|
|
// GetUint160FromAddress returns Uint160 value of the parameter that was
|
|
// supplied as an address.
|
|
func (p Param) GetUint160FromAddress() (util.Uint160, error) {
|
|
s, err := p.GetString()
|
|
if err != nil {
|
|
return util.Uint160{}, err
|
|
}
|
|
|
|
return address.StringToUint160(s)
|
|
}
|
|
|
|
// GetFuncParam returns current parameter as a function call parameter.
|
|
func (p Param) GetFuncParam() (FuncParam, error) {
|
|
fp, ok := p.Value.(FuncParam)
|
|
if !ok {
|
|
return FuncParam{}, errors.New("not a function parameter")
|
|
}
|
|
return fp, nil
|
|
}
|
|
|
|
// GetBytesHex returns []byte value of the parameter if
|
|
// it is a hex-encoded string.
|
|
func (p Param) GetBytesHex() ([]byte, error) {
|
|
s, err := p.GetString()
|
|
if err != nil {
|
|
return nil, err
|
|
}
|
|
|
|
return hex.DecodeString(s)
|
|
}
|
|
|
|
// UnmarshalJSON implements json.Unmarshaler interface.
|
|
func (p *Param) UnmarshalJSON(data []byte) error {
|
|
var s string
|
|
if err := json.Unmarshal(data, &s); err == nil {
|
|
p.Type = stringT
|
|
p.Value = s
|
|
|
|
return nil
|
|
}
|
|
|
|
var num float64
|
|
if err := json.Unmarshal(data, &num); err == nil {
|
|
p.Type = numberT
|
|
p.Value = int(num)
|
|
|
|
return nil
|
|
}
|
|
|
|
r := bytes.NewReader(data)
|
|
jd := json.NewDecoder(r)
|
|
jd.DisallowUnknownFields()
|
|
var fp FuncParam
|
|
if err := jd.Decode(&fp); err == nil {
|
|
p.Type = funcParamT
|
|
p.Value = fp
|
|
|
|
return nil
|
|
}
|
|
|
|
var ps []Param
|
|
if err := json.Unmarshal(data, &ps); err == nil {
|
|
p.Type = arrayT
|
|
p.Value = ps
|
|
|
|
return nil
|
|
}
|
|
|
|
return errors.New("unknown type")
|
|
}
|