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parseDCT.go
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parseDCT.go
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package scenjsonparse
import (
"errors"
"fmt"
oj "github.com/Dharitri-org/drtg-scenario/orderedjson"
scenmodel "github.com/Dharitri-org/drtg-scenario/scenario/model"
)
func (p *Parser) processDCTData(
tokenName scenmodel.JSONBytesFromString,
dctDataRaw oj.OJsonObject) (*scenmodel.DCTData, error) {
switch data := dctDataRaw.(type) {
case *oj.OJsonString:
// simple string representing balance "400,000,000,000"
dctData := scenmodel.DCTData{
TokenIdentifier: tokenName,
}
balance, err := p.processBigInt(dctDataRaw, bigIntUnsignedBytes)
if err != nil {
return nil, fmt.Errorf("invalid DCT balance: %w", err)
}
dctData.Instances = []*scenmodel.DCTInstance{
{
Nonce: scenmodel.JSONUint64{Value: 0, Original: ""},
Balance: balance,
},
}
return &dctData, nil
case *oj.OJsonMap:
return p.processDCTDataMap(tokenName, data)
default:
return nil, errors.New("invalid JSON object for DCT")
}
}
// Map containing DCT fields, e.g.:
//
// {
// "instances": [ ... ],
// "lastNonce": "5",
// "frozen": "true"
// }
func (p *Parser) processDCTDataMap(tokenName scenmodel.JSONBytesFromString, dctDataMap *oj.OJsonMap) (*scenmodel.DCTData, error) {
dctData := scenmodel.DCTData{
TokenIdentifier: tokenName,
}
firstInstance := &scenmodel.DCTInstance{}
firstInstanceLoaded := false
var explicitInstances []*scenmodel.DCTInstance
for _, kvp := range dctDataMap.OrderedKV {
// it is allowed to load the instance directly, fields set to the first instance
instanceFieldLoaded, err := p.tryProcessDCTInstanceField(kvp, firstInstance)
if err != nil {
return nil, fmt.Errorf("invalid account DCT instance field: %w", err)
}
if instanceFieldLoaded {
firstInstanceLoaded = true
} else {
switch kvp.Key {
case "instances":
explicitInstances, err = p.processDCTInstances(kvp.Value)
if err != nil {
return nil, fmt.Errorf("invalid account DCT instances: %w", err)
}
case "lastNonce":
dctData.LastNonce, err = p.processUint64(kvp.Value)
if err != nil {
return nil, fmt.Errorf("invalid account DCT lastNonce: %w", err)
}
case "roles":
dctData.Roles, err = p.processStringList(kvp.Value)
if err != nil {
return nil, fmt.Errorf("invalid account DCT roles: %w", err)
}
case "frozen":
dctData.Frozen, err = p.processUint64(kvp.Value)
if err != nil {
return nil, fmt.Errorf("invalid DCT frozen flag: %w", err)
}
default:
return nil, fmt.Errorf("unknown DCT data field: %s", kvp.Key)
}
}
}
if firstInstanceLoaded {
if !p.AllowDctLegacySetSyntax {
return nil, fmt.Errorf("wrong DCT set state syntax: instances in root no longer allowed")
}
dctData.Instances = []*scenmodel.DCTInstance{firstInstance}
}
dctData.Instances = append(dctData.Instances, explicitInstances...)
return &dctData, nil
}
func (p *Parser) tryProcessDCTInstanceField(kvp *oj.OJsonKeyValuePair, targetInstance *scenmodel.DCTInstance) (bool, error) {
var err error
switch kvp.Key {
case "nonce":
targetInstance.Nonce, err = p.processUint64(kvp.Value)
if err != nil {
return false, fmt.Errorf("invalid account nonce: %w", err)
}
case "balance":
targetInstance.Balance, err = p.processBigInt(kvp.Value, bigIntUnsignedBytes)
if err != nil {
return false, fmt.Errorf("invalid DCT balance: %w", err)
}
case "creator":
targetInstance.Creator, err = p.processStringAsByteArray(kvp.Value)
if err != nil || len(targetInstance.Creator.Value) != 32 {
return false, fmt.Errorf("invalid DCT NFT creator address: %w", err)
}
case "royalties":
targetInstance.Royalties, err = p.processUint64(kvp.Value)
if err != nil || targetInstance.Royalties.Value > 10000 {
return false, fmt.Errorf("invalid DCT NFT royalties: %w", err)
}
case "hash":
targetInstance.Hash, err = p.processStringAsByteArray(kvp.Value)
if err != nil {
return false, fmt.Errorf("invalid DCT NFT hash: %w", err)
}
case "uri":
targetInstance.Uris, err = p.parseValueList(kvp.Value)
if err != nil {
return false, fmt.Errorf("invalid DCT NFT URI: %w", err)
}
case "attributes":
targetInstance.Attributes, err = p.processSubTreeAsByteArray(kvp.Value)
if err != nil {
return false, fmt.Errorf("invalid DCT NFT attributes: %w", err)
}
default:
return false, nil
}
return true, nil
}
func (p *Parser) processDCTInstances(dctInstancesRaw oj.OJsonObject) ([]*scenmodel.DCTInstance, error) {
var instancesResult []*scenmodel.DCTInstance
dctInstancesList, isList := dctInstancesRaw.(*oj.OJsonList)
if !isList {
return nil, errors.New("dct instances object is not a list")
}
for _, instanceItem := range dctInstancesList.AsList() {
instanceAsMap, isMap := instanceItem.(*oj.OJsonMap)
if !isMap {
return nil, errors.New("JSON map expected as dct instances list item")
}
instance := &scenmodel.DCTInstance{}
for _, kvp := range instanceAsMap.OrderedKV {
instanceFieldLoaded, err := p.tryProcessDCTInstanceField(kvp, instance)
if err != nil {
return nil, fmt.Errorf("invalid account DCT instance field in instances list: %w", err)
}
if !instanceFieldLoaded {
return nil, fmt.Errorf("invalid account DCT instance field in instances list: `%s`", kvp.Key)
}
}
instancesResult = append(instancesResult, instance)
}
return instancesResult, nil
}