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types.go
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types.go
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package eos
import (
"encoding/base64"
"encoding/binary"
"encoding/hex"
"encoding/json"
"errors"
"fmt"
"math"
"math/big"
"reflect"
"regexp"
"strconv"
"strings"
"time"
"github.com/eoscanada/eos-go/ecc"
"github.com/tidwall/gjson"
)
var symbolRegex = regexp.MustCompile("^[0-9]{1,2},[A-Z]{1,7}$")
var symbolCodeRegex = regexp.MustCompile("^[A-Z]{1,7}$")
// For reference:
// https://github.com/mithrilcoin-io/EosCommander/blob/master/app/src/main/java/io/mithrilcoin/eoscommander/data/remote/model/types/EosByteWriter.java
type Name string
type AccountName Name
type PermissionName Name
type ActionName Name
type TableName Name
type ScopeName Name
func AN(in string) AccountName { return AccountName(in) }
func ActN(in string) ActionName { return ActionName(in) }
func PN(in string) PermissionName { return PermissionName(in) }
func (n Name) String() string { return string(n) }
func (n AccountName) String() string { return string(n) }
func (n PermissionName) String() string { return string(n) }
func (n ActionName) String() string { return string(n) }
func (n TableName) String() string { return string(n) }
func (n ScopeName) String() string { return string(n) }
type SafeString string
func (ss *SafeString) UnmarshalBinary(d *Decoder) error {
s, e := d.SafeReadUTF8String()
if e != nil {
return e
}
*ss = SafeString(s)
return nil
}
type AccountResourceLimit struct {
Used Int64 `json:"used"`
Available Int64 `json:"available"`
Max Int64 `json:"max"`
}
type DelegatedBandwidth struct {
From AccountName `json:"from"`
To AccountName `json:"to"`
NetWeight Asset `json:"net_weight"`
CPUWeight Asset `json:"cpu_weight"`
}
type TotalResources struct {
Owner AccountName `json:"owner"`
NetWeight Asset `json:"net_weight"`
CPUWeight Asset `json:"cpu_weight"`
RAMBytes Int64 `json:"ram_bytes"`
}
type VoterInfo struct {
Owner AccountName `json:"owner"`
Proxy AccountName `json:"proxy"`
Producers []AccountName `json:"producers"`
Staked Int64 `json:"staked"`
LastVoteWeight Float64 `json:"last_vote_weight"`
ProxiedVoteWeight Float64 `json:"proxied_vote_weight"`
IsProxy byte `json:"is_proxy"`
}
type RefundRequest struct {
Owner AccountName `json:"owner"`
RequestTime JSONTime `json:"request_time"` // {"name":"request_time", "type":"time_point_sec"},
NetAmount Asset `json:"net_amount"`
CPUAmount Asset `json:"cpu_amount"`
}
type CompressionType uint8
const (
CompressionNone = CompressionType(iota)
CompressionZlib
)
func (c CompressionType) String() string {
switch c {
case CompressionNone:
return "none"
case CompressionZlib:
return "zlib"
default:
return ""
}
}
func (c CompressionType) MarshalJSON() ([]byte, error) {
return json.Marshal(c.String())
}
func (c *CompressionType) UnmarshalJSON(data []byte) error {
tryNext, err := c.tryUnmarshalJSONAsBool(data)
if err != nil && !tryNext {
return err
}
if !tryNext {
return nil
}
tryNext, err = c.tryUnmarshalJSONAsString(data)
if err != nil && !tryNext {
return err
}
if !tryNext {
return nil
}
_, err = c.tryUnmarshalJSONAsUint8(data)
return err
}
func (c *CompressionType) tryUnmarshalJSONAsString(data []byte) (tryNext bool, err error) {
var s string
err = json.Unmarshal(data, &s)
if err != nil {
_, isTypeError := err.(*json.UnmarshalTypeError)
// Let's continue with next handler is we hit a type error, might be an integer...
return isTypeError, err
}
switch s {
case "none":
*c = CompressionNone
case "zlib":
*c = CompressionZlib
default:
return false, fmt.Errorf("unknown compression type %s", s)
}
return false, nil
}
func (c *CompressionType) tryUnmarshalJSONAsBool(data []byte) (tryNext bool, err error) {
var b bool
err = json.Unmarshal(data, &b)
if err != nil {
_, isTypeError := err.(*json.UnmarshalTypeError)
// Let's continue with next handler is we hit a type error, might be an integer...
return isTypeError, err
}
if b {
*c = CompressionZlib
} else {
*c = CompressionNone
}
return false, nil
}
func (c *CompressionType) tryUnmarshalJSONAsUint8(data []byte) (tryNext bool, err error) {
var s uint8
err = json.Unmarshal(data, &s)
if err != nil {
return false, err
}
switch s {
case 0:
*c = CompressionNone
case 1:
*c = CompressionZlib
default:
return false, fmt.Errorf("unknown compression type %d", s)
}
return false, nil
}
// CurrencyName
type CurrencyName string
type Bool bool
func (b *Bool) UnmarshalJSON(data []byte) error {
var num int
err := json.Unmarshal(data, &num)
if err == nil {
*b = Bool(num != 0)
return nil
}
var boolVal bool
if err := json.Unmarshal(data, &boolVal); err != nil {
return fmt.Errorf("couldn't unmarshal bool as int or true/false: %w", err)
}
*b = Bool(boolVal)
return nil
}
// Asset
// NOTE: there's also ExtendedAsset which is a quantity with the attached contract (AccountName)
type Asset struct {
Amount Int64
Symbol
}
func (a Asset) Add(other Asset) Asset {
if a.Symbol != other.Symbol {
panic("Add applies only to assets with the same symbol")
}
return Asset{Amount: a.Amount + other.Amount, Symbol: a.Symbol}
}
func (a Asset) Sub(other Asset) Asset {
if a.Symbol != other.Symbol {
panic("Sub applies only to assets with the same symbol")
}
return Asset{Amount: a.Amount - other.Amount, Symbol: a.Symbol}
}
func (a Asset) String() string {
amt := a.Amount
if amt < 0 {
amt = -amt
}
precisionDigitCount := int(a.Symbol.Precision)
dotAndPrecisionDigitCount := precisionDigitCount + 1
strInt := strconv.FormatInt(int64(amt), 10)
if len(strInt) < dotAndPrecisionDigitCount {
// prepend `0` for the difference:
strInt = strings.Repeat("0", dotAndPrecisionDigitCount-len(strInt)) + strInt
}
result := strInt
if a.Symbol.Precision > 0 {
result = strInt[:len(strInt)-precisionDigitCount] + "." + strInt[len(strInt)-precisionDigitCount:]
}
if a.Amount < 0 {
result = "-" + result
}
return fmt.Sprintf("%s %s", result, a.Symbol.Symbol)
}
type ExtendedAsset struct {
Asset Asset `json:"quantity"`
Contract AccountName `json:"contract"`
}
// NOTE: there's also a new ExtendedSymbol (which includes the contract (as AccountName) on which it is)
type Symbol struct {
Precision uint8
Symbol string
// Caching of symbol code if it was computed once
symbolCode uint64
}
func NewSymbolFromUint64(value uint64) (out Symbol) {
out.Precision = uint8(value & 0xFF)
out.symbolCode = value >> 8
out.Symbol = SymbolCode(out.symbolCode).String()
return
}
func NameToSymbol(name Name) (Symbol, error) {
symbol := Symbol{}
value, err := StringToName(string(name))
if err != nil {
return symbol, fmt.Errorf("name %s is invalid: %w", name, err)
}
symbol.Precision = uint8(value & 0xFF)
symbol.symbolCode = value >> 8
symbol.Symbol = SymbolCode(symbol.symbolCode).String()
return symbol, nil
}
func StringToSymbol(str string) (Symbol, error) {
symbol := Symbol{}
if !symbolRegex.MatchString(str) {
return symbol, fmt.Errorf("%s is not a valid symbol", str)
}
arrs := strings.Split(str, ",")
precision, _ := strconv.ParseUint(string(arrs[0]), 10, 8)
symbol.Precision = uint8(precision)
symbol.Symbol = arrs[1]
return symbol, nil
}
func MustStringToSymbol(str string) Symbol {
symbol, err := StringToSymbol(str)
if err != nil {
panic(fmt.Errorf("invalid symbol %q: %w", str, err))
}
return symbol
}
func (s Symbol) SymbolCode() (SymbolCode, error) {
if s.symbolCode != 0 {
return SymbolCode(s.symbolCode), nil
}
symbolCode, err := StringToSymbolCode(s.Symbol)
if err != nil {
return 0, err
}
return SymbolCode(symbolCode), nil
}
func (s Symbol) MustSymbolCode() SymbolCode {
symbolCode, err := StringToSymbolCode(s.Symbol)
if err != nil {
panic("invalid symbol code " + s.Symbol)
}
return symbolCode
}
func (s Symbol) ToUint64() (uint64, error) {
symbolCode, err := s.SymbolCode()
if err != nil {
return 0, fmt.Errorf("symbol %s is not a valid symbol code: %w", s.Symbol, err)
}
return uint64(symbolCode)<<8 | uint64(s.Precision), nil
}
func (s Symbol) ToName() (string, error) {
u, err := s.ToUint64()
if err != nil {
return "", err
}
return NameToString(u), nil
}
func (s Symbol) String() string {
return fmt.Sprintf("%d,%s", s.Precision, s.Symbol)
}
func (s *Symbol) UnmarshalJSON(data []byte) error {
var str string
err := json.Unmarshal(data, &str)
if err != nil {
return err
}
sym, err := StringToSymbol(str)
if err != nil {
return err
}
*s = sym
return nil
}
type SymbolCode uint64
func NameToSymbolCode(name Name) (SymbolCode, error) {
value, err := StringToName(string(name))
if err != nil {
return 0, fmt.Errorf("name %s is invalid: %w", name, err)
}
return SymbolCode(value), nil
}
func StringToSymbolCode(str string) (SymbolCode, error) {
if len(str) > 7 {
return 0, fmt.Errorf("string is too long to be a valid symbol_code")
}
var symbolCode uint64
for i := len(str) - 1; i >= 0; i-- {
if str[i] < 'A' || str[i] > 'Z' {
return 0, fmt.Errorf("only uppercase letters allowed in symbol_code string")
}
symbolCode <<= 8
symbolCode = symbolCode | uint64(str[i])
}
return SymbolCode(symbolCode), nil
}
func (sc SymbolCode) ToName() string {
return NameToString(uint64(sc))
}
func (sc SymbolCode) String() string {
builder := strings.Builder{}
symbolCode := uint64(sc)
for i := 0; i < 7; i++ {
if symbolCode == 0 {
return builder.String()
}
builder.WriteByte(byte(symbolCode & 0xFF))
symbolCode >>= 8
}
return builder.String()
}
func (sc SymbolCode) MarshalJSON() (data []byte, err error) {
return []byte(`"` + sc.String() + `"`), nil
}
// EOSSymbol represents the standard EOS symbol on the chain. It's
// here just to speed up things.
var EOSSymbol = Symbol{Precision: 4, Symbol: "EOS"}
// REXSymbol represents the standard REX symbol on the chain. It's
// here just to speed up things.
var REXSymbol = Symbol{Precision: 4, Symbol: "REX"}
// TNTSymbol represents the standard EOSIO Testnet symbol on the testnet chain.
// Temporary Network Token (TNT) is the native token of the EOSIO Testnet.
// It's here just to speed up things.
var TNTSymbol = Symbol{Precision: 4, Symbol: "TNT"}
func NewEOSAsset(amount int64) Asset {
return Asset{Amount: Int64(amount), Symbol: EOSSymbol}
}
// NewAsset reads from a string an EOS asset.
//
// Deprecated: Use `NewAssetFromString` instead
func NewAsset(in string) (out Asset, err error) {
return NewAssetFromString(in)
}
// NewAssetFromString reads a string an decode it to an eos.Asset
// structure if possible. The input must contains an amount and
// a symbol. The precision is inferred based on the actual number
// of decimals present.
func NewAssetFromString(in string) (out Asset, err error) {
out, err = newAssetFromString(in)
if err != nil {
return out, err
}
if out.Symbol.Symbol == "" {
return out, fmt.Errorf("invalid format %q, expected an amount and a currency symbol", in)
}
return
}
func NewEOSAssetFromString(input string) (Asset, error) {
return NewFixedSymbolAssetFromString(EOSSymbol, input)
}
func NewREXAssetFromString(input string) (Asset, error) {
return NewFixedSymbolAssetFromString(REXSymbol, input)
}
func NewTNTAssetFromString(input string) (Asset, error) {
return NewFixedSymbolAssetFromString(TNTSymbol, input)
}
func NewFixedSymbolAssetFromString(symbol Symbol, input string) (out Asset, err error) {
integralPart, decimalPart, symbolPart, err := splitAsset(input)
if err != nil {
return out, err
}
symbolCode := symbol.MustSymbolCode().String()
precision := symbol.Precision
if len(decimalPart) > int(precision) {
return out, fmt.Errorf("symbol %s precision mismatch: expected %d, got %d", symbol, precision, len(decimalPart))
}
if symbolPart != "" && symbolPart != symbolCode {
return out, fmt.Errorf("symbol %s code mismatch: expected %s, got %s", symbol, symbolCode, symbolPart)
}
if len(decimalPart) < int(precision) {
decimalPart += strings.Repeat("0", int(precision)-len(decimalPart))
}
val, err := strconv.ParseInt(integralPart+decimalPart, 10, 64)
if err != nil {
return out, err
}
return Asset{
Amount: Int64(val),
Symbol: Symbol{Precision: precision, Symbol: symbolCode},
}, nil
}
func newAssetFromString(in string) (out Asset, err error) {
integralPart, decimalPart, symbolPart, err := splitAsset(in)
if err != nil {
return out, err
}
val, err := strconv.ParseInt(integralPart+decimalPart, 10, 64)
if err != nil {
return out, err
}
out.Amount = Int64(val)
out.Symbol.Precision = uint8(len(decimalPart))
out.Symbol.Symbol = symbolPart
return
}
func splitAsset(input string) (integralPart, decimalPart, symbolPart string, err error) {
input = strings.Trim(input, " ")
if len(input) == 0 {
return "", "", "", fmt.Errorf("input cannot be empty")
}
parts := strings.Split(input, " ")
if len(parts) >= 1 {
integralPart, decimalPart, err = splitAssetAmount(parts[0])
if err != nil {
return
}
}
if len(parts) == 2 {
symbolPart = parts[1]
if len(symbolPart) > 7 {
return "", "", "", fmt.Errorf("invalid asset %q, symbol should have less than 7 characters", input)
}
}
if len(parts) > 2 {
return "", "", "", fmt.Errorf("invalid asset %q, expecting an amount alone or an amount and a currency symbol", input)
}
return
}
func splitAssetAmount(input string) (integralPart, decimalPart string, err error) {
parts := strings.Split(input, ".")
switch len(parts) {
case 1:
integralPart = parts[0]
case 2:
integralPart = parts[0]
decimalPart = parts[1]
if len(decimalPart) > math.MaxUint8 {
err = fmt.Errorf("invalid asset amount precision %q, should have less than %d characters", input, math.MaxUint8)
}
default:
return "", "", fmt.Errorf("invalid asset amount %q, expected amount to have at most a single dot", input)
}
return
}
func (a *Asset) UnmarshalJSON(data []byte) error {
var s string
err := json.Unmarshal(data, &s)
if err != nil {
return err
}
asset, err := NewAsset(s)
if err != nil {
return err
}
*a = asset
return nil
}
func (a Asset) MarshalJSON() (data []byte, err error) {
return json.Marshal(a.String())
}
type Permission struct {
PermName string `json:"perm_name"`
Parent string `json:"parent"`
RequiredAuth Authority `json:"required_auth"`
}
type PermissionLevel struct {
Actor AccountName `json:"actor"`
Permission PermissionName `json:"permission"`
}
// NewPermissionLevel parses strings like `account@active`,
// `otheraccount@owner` and builds a PermissionLevel struct. It
// validates that there is a single optional @ (where permission
// defaults to 'active'), and validates length of account and
// permission names.
func NewPermissionLevel(in string) (out PermissionLevel, err error) {
parts := strings.Split(in, "@")
if len(parts) > 2 {
return out, fmt.Errorf("permission %q invalid, use account[@permission]", in)
}
if len(parts[0]) > 12 {
return out, fmt.Errorf("account name %q too long", parts[0])
}
out.Actor = AccountName(parts[0])
out.Permission = PermissionName("active")
if len(parts) == 2 {
if len(parts[1]) > 12 {
return out, fmt.Errorf("permission %q name too long", parts[1])
}
out.Permission = PermissionName(parts[1])
}
return
}
type PermissionLevelWeight struct {
Permission PermissionLevel `json:"permission"`
Weight uint16 `json:"weight"` // weight_type
}
type Authority struct {
Threshold uint32 `json:"threshold"`
Keys []KeyWeight `json:"keys,omitempty"`
Accounts []PermissionLevelWeight `json:"accounts,omitempty"`
Waits []WaitWeight `json:"waits,omitempty"`
}
type KeyWeight struct {
PublicKey ecc.PublicKey `json:"key"`
Weight uint16 `json:"weight"` // weight_type
}
type WaitWeight struct {
WaitSec uint32 `json:"wait_sec"`
Weight uint16 `json:"weight"` // weight_type
}
type GetRawCodeAndABIResp struct {
AccountName AccountName `json:"account_name"`
WASMasBase64 string `json:"wasm"`
ABIasBase64 string `json:"abi"`
}
type GetCodeResp struct {
AccountName AccountName `json:"account_name"`
CodeHash string `json:"code_hash"`
WASM string `json:"wasm"`
ABI ABI `json:"abi"`
}
type GetCodeHashResp struct {
AccountName AccountName `json:"account_name"`
CodeHash string `json:"code_hash"`
}
type GetABIResp struct {
AccountName AccountName `json:"account_name"`
ABI ABI `json:"abi"`
}
type ABIJSONToBinResp struct {
Binargs string `json:"binargs"`
}
type ABIBinToJSONResp struct {
Args M `json:"args"`
}
// JSONTime
type JSONTime struct {
time.Time
}
const JSONTimeFormat = "2006-01-02T15:04:05"
func (t JSONTime) MarshalJSON() ([]byte, error) {
return []byte(fmt.Sprintf("%q", t.Format(JSONTimeFormat))), nil
}
func (t *JSONTime) UnmarshalJSON(data []byte) (err error) {
if string(data) == "null" {
return nil
}
t.Time, err = time.Parse(`"`+JSONTimeFormat+`"`, string(data))
return err
}
// ParseJSONTime will parse a string into a JSONTime object
func ParseJSONTime(date string) (JSONTime, error) {
var t JSONTime
var err error
t.Time, err = time.Parse(JSONTimeFormat, string(date))
return t, err
}
// HexBytes
type HexBytes []byte
func (t HexBytes) MarshalJSON() ([]byte, error) {
return json.Marshal(hex.EncodeToString(t))
}
func (t *HexBytes) UnmarshalJSON(data []byte) (err error) {
var s string
err = json.Unmarshal(data, &s)
if err != nil {
return
}
*t, err = hex.DecodeString(s)
return
}
func (t HexBytes) String() string {
return hex.EncodeToString(t)
}
// Checksum256
type Checksum160 []byte
func (t Checksum160) MarshalJSON() ([]byte, error) {
return json.Marshal(hex.EncodeToString(t))
}
func (t *Checksum160) UnmarshalJSON(data []byte) (err error) {
var s string
err = json.Unmarshal(data, &s)
if err != nil {
return
}
*t, err = hex.DecodeString(s)
return
}
type Checksum256 []byte
func (t Checksum256) MarshalJSON() ([]byte, error) {
return json.Marshal(hex.EncodeToString(t))
}
func (t *Checksum256) UnmarshalJSON(data []byte) (err error) {
var s string
err = json.Unmarshal(data, &s)
if err != nil {
return
}
*t, err = hex.DecodeString(s)
return
}
func (t Checksum256) String() string {
return hex.EncodeToString(t)
}
type Checksum512 []byte
func (t Checksum512) MarshalJSON() ([]byte, error) {
return json.Marshal(hex.EncodeToString(t))
}
func (t *Checksum512) UnmarshalJSON(data []byte) (err error) {
var s string
err = json.Unmarshal(data, &s)
if err != nil {
return
}
*t, err = hex.DecodeString(s)
return
}
// SHA256Bytes is deprecated and renamed to Checksum256 for
// consistency. Please update your code as this type will eventually
// be phased out.
type SHA256Bytes = Checksum256
type Varuint32 uint32
type Varint32 int32
// Tstamp
type Tstamp struct {
time.Time
}
func (t Tstamp) MarshalJSON() ([]byte, error) {
return json.Marshal(fmt.Sprintf("%d", t.UnixNano()))
}
func (t *Tstamp) UnmarshalJSON(data []byte) (err error) {
var unixNano int64
if data[0] == '"' {
var s string
if err = json.Unmarshal(data, &s); err != nil {
return
}
unixNano, err = strconv.ParseInt(s, 10, 64)
if err != nil {
return err
}
} else {
unixNano, err = strconv.ParseInt(string(data), 10, 64)
if err != nil {
return err
}
}
*t = Tstamp{time.Unix(0, unixNano)}
return nil
}
// BlockNum extracts the block number (or height) from a hex-encoded block ID.
func BlockNum(blockID string) uint32 {
if len(blockID) < 8 {
return 0
}
bin, err := hex.DecodeString(blockID[:8])
if err != nil {
return 0
}
return binary.BigEndian.Uint32(bin)
}
type BlockTimestamp struct {
time.Time
}
// blockTimestampFormat
//
// We deal with timezone in a conditional matter so we allowed for example the
// unmarshalling to accept with and without timezone specifier.
const blockTimestampFormat = "2006-01-02T15:04:05.999"
func (t BlockTimestamp) MarshalJSON() ([]byte, error) {
strTime := t.Format(blockTimestampFormat)
if len(strTime) == len("2006-01-02T15:04:05.5") {
strTime += "00"
}
return []byte(`"` + strTime + `"`), nil
}
func (t *BlockTimestamp) UnmarshalJSON(data []byte) (err error) {
if string(data) == "null" {
return nil
}
t.Time, err = time.Parse(`"`+blockTimestampFormat+`"`, string(data))
if err != nil {
t.Time, err = time.Parse(`"`+blockTimestampFormat+`Z07:00"`, string(data))
}
return err
}
// TimePoint represents the number of microseconds since EPOCH (Jan 1st 1970)
type TimePoint uint64
func (f TimePoint) String() string {
return formatTimePoint(f, true)
}
func (f TimePoint) MarshalJSON() ([]byte, error) {
return []byte(`"` + formatTimePoint(f, true) + `"`), nil
}
func (f *TimePoint) UnmarshalJSON(data []byte) error {
var s string
if err := json.Unmarshal(data, &s); err != nil {
return err
}
out, err := time.Parse(standardTimePointFormat, s)
if err != nil {
return err
}
*f = TimePoint(out.UnixNano() / 1000)
return nil
}
// AsTime returns the TimePoint as time.Time in UTC
func (f TimePoint) AsTime() time.Time {
// copied from time.UnixMicro, the latter was added in 1.17
return time.Unix(int64(f)/1e6, (int64(f)%1e6)*1e3).UTC()
}
// TimePointSec represents the number of seconds since EPOCH (Jan 1st 1970)
type TimePointSec uint32
func (f TimePointSec) String() string {
return formatTimePointSec(f)
}
func (f TimePointSec) MarshalJSON() ([]byte, error) {
return []byte(`"` + formatTimePointSec(f) + `"`), nil
}
func (f *TimePointSec) UnmarshalJSON(data []byte) error {
var s string
if err := json.Unmarshal(data, &s); err != nil {
return err
}
out, err := time.Parse(standardTimePointFormat, s)
if err != nil {
return err
}
*f = TimePointSec(out.Unix())
return nil
}
// AsTime returns the TimePointSec as time.Time in UTC
func (f TimePointSec) AsTime() time.Time {
return time.Unix(int64(f), 0).UTC()
}
type JSONFloat64 = Float64
type Float64 float64
func (f *Float64) MarshalJSON() ([]byte, error) {
switch {
case math.IsInf(float64(*f), 1):
return []byte("\"inf\""), nil
case math.IsInf(float64(*f), -1):
return []byte("\"-inf\""), nil
case math.IsNaN(float64(*f)):
return []byte("\"nan\""), nil
default:
}
return json.Marshal(float64(*f))
}
func (f *Float64) UnmarshalJSON(data []byte) error {
if len(data) == 0 {
return errors.New("empty value")
}
if data[0] == '"' {
var s string
if err := json.Unmarshal(data, &s); err != nil {
return err
}
switch s {
case "inf":
*f = Float64(math.Inf(1))
return nil
case "-inf":
*f = Float64(math.Inf(-1))
return nil
case "nan":
*f = Float64(math.NaN())
return nil
default:
}