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invariable.nft.go
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/
invariable.nft.go
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package bk
import (
"fmt"
"github.com/hootuu/tome/ki"
"github.com/hootuu/tome/uc/nft"
"github.com/hootuu/tome/vn"
"github.com/hootuu/utils/errors"
"strings"
"time"
)
const (
InvariableNFTType Type = "hotu.nft"
InvariableNFTVersion = DefaultVersion
)
type InvariableNFT struct {
Type Type `json:"type"`
Version Version `json:"version"`
Vn *VNLead `json:"vn"`
Category nft.Category `json:"category"`
Token nft.Token `json:"token"`
Tag []nft.Tag `json:"tag"`
Link nft.Link `json:"link"`
Title string `json:"title"`
Description string `json:"desc"`
Meta nft.Meta `json:"meta"`
Timestamp int64 `json:"timestamp"`
Signature []byte `json:"signature"`
}
func NewInvariableNFT(
vnLead *VNLead,
nftM *nft.NFT,
vnGuardianPri ki.PRI,
) (*InvariableNFT, *errors.Error) {
if err := nftM.Verify(); err != nil {
return nil, err
}
i := &InvariableNFT{
Type: InvariableNFTType,
Version: InvariableNFTVersion,
Vn: vnLead,
Category: nftM.Category,
Token: nftM.Token,
Tag: nftM.Tag,
Link: nftM.Link,
Title: nftM.Title,
Description: nftM.Description,
Meta: nftM.Meta,
Timestamp: time.Now().UnixMilli(),
Signature: nil,
}
var err *errors.Error
i.Signature, err = i.Sign(vnGuardianPri)
if err != nil {
return nil, err
}
return i, nil
}
func (i *InvariableNFT) getSignBuilder() *SignBuilder {
metaBytes, _ := nft.MetaToData(i.Meta)
metaStr := ""
if metaBytes != nil {
metaStr = string(metaBytes)
}
return NewSignBuilder().
Add("type", i.Type.S()).
Add("version", i.Version.S()).
Add("vn", i.Vn.S()).
Add("category", i.Category.S()).
Add("token", i.Token.S()).
Add("tag", strings.Join(i.Tag, ",")).
Add("link", i.Link).
Add("title", i.Title).
Add("desc", i.Description).
Add("meta", metaStr).
Add("timestamp", fmt.Sprintf("%d", i.Timestamp))
}
func (i *InvariableNFT) Sign(pri ki.PRI) ([]byte, *errors.Error) {
signBuilder := i.getSignBuilder()
signStr, err := signBuilder.Sign(pri)
if err != nil {
return nil, err
}
return []byte(signStr), nil
}
func (i *InvariableNFT) SignVerify(vnGuardianPub ki.PUB) (bool, *errors.Error) {
signBuilder := i.getSignBuilder()
return signBuilder.Verify(vnGuardianPub, string(i.Signature))
}
func (i *InvariableNFT) GetType() Type {
return i.Type
}
func (i *InvariableNFT) GetVersion() Version {
return i.Version
}
func (i *InvariableNFT) GetVN() vn.ID {
return i.Vn.Vn
}
func (i *InvariableNFT) GetSignature() []byte {
return i.Signature
}
func (i *InvariableNFT) GetTimestamp() int64 {
return i.Timestamp
}