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badger_asset.go
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badger_asset.go
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package storage
import (
"encoding/json"
"fmt"
"github.com/MixinNetwork/mixin/common"
"github.com/MixinNetwork/mixin/crypto"
"github.com/dgraph-io/badger/v4"
)
func (s *BadgerStore) ReadAssetWithBalance(id crypto.Hash) (*common.Asset, common.Integer, error) {
txn := s.snapshotsDB.NewTransaction(false)
defer txn.Discard()
asset, err := readAssetInfo(txn, id)
if err != nil || asset == nil {
return nil, common.Zero, err
}
balance, err := readTotalInAsset(txn, id)
if err != nil {
return nil, common.Zero, err
}
return asset, balance, nil
}
func readTotalInAsset(txn *badger.Txn, hash crypto.Hash) (common.Integer, error) {
key := graphAssetTotalKey(hash)
item, err := txn.Get(key)
if err == badger.ErrKeyNotFound {
return common.Zero, nil
} else if err != nil {
return common.Zero, err
}
val, err := item.ValueCopy(nil)
if err != nil {
return common.Zero, err
}
return common.NewIntegerFromString(string(val)), nil
}
func writeTotalInAsset(txn *badger.Txn, ver *common.VersionedTransaction) error {
asset, err := readAssetInfo(txn, ver.Asset)
if err != nil {
return err
} else if asset == nil {
panic(ver.Asset.String())
}
total, err := readTotalInAsset(txn, ver.Asset)
if err != nil {
return err
}
typ := ver.TransactionType()
switch { // TODO needs full test code for all kind of transactions
case typ == common.TransactionTypeWithdrawalSubmit:
total = total.Sub(ver.Outputs[0].Amount)
case typ == common.TransactionTypeDeposit:
total = total.Add(ver.DepositData().Amount)
case typ == common.TransactionTypeMint:
total = total.Add(ver.Inputs[0].Mint.Amount)
case len(ver.Inputs[0].Genesis) > 0:
for _, out := range ver.Outputs {
total = total.Add(out.Amount)
}
default:
return nil
}
max := common.GetAssetCapacity(ver.Asset)
if total.Cmp(max) > 0 {
panic(total.String())
}
key := graphAssetTotalKey(ver.Asset)
return txn.Set(key, []byte(total.String()))
}
func readAssetInfo(txn *badger.Txn, id crypto.Hash) (*common.Asset, error) {
key := graphAssetInfoKey(id)
item, err := txn.Get(key)
if err == badger.ErrKeyNotFound {
return nil, nil
} else if err != nil {
return nil, err
}
val, err := item.ValueCopy(nil)
if err != nil {
return nil, err
}
var a common.Asset
err = json.Unmarshal(val, &a)
if err != nil {
return nil, err
}
return &a, a.Verify()
}
func verifyAssetInfo(txn *badger.Txn, id crypto.Hash, a *common.Asset) error {
old, err := readAssetInfo(txn, id)
if err != nil || old == nil {
return err
}
if old.Chain == a.Chain && old.AssetKey == a.AssetKey {
return nil
}
return fmt.Errorf("invalid asset info %s %v %v", id.String(), *old, *a)
}
func writeAssetInfo(txn *badger.Txn, id crypto.Hash, a *common.Asset) error {
old, err := readAssetInfo(txn, id)
if err != nil {
return err
}
if old == nil {
v, err := json.Marshal(a)
if err != nil {
panic(err)
}
key := graphAssetInfoKey(id)
return txn.Set(key, v)
}
if old.Chain == a.Chain && old.AssetKey == a.AssetKey {
return nil
}
return fmt.Errorf("invalid asset info %s %v %v", id.String(), *old, *a)
}
func graphAssetInfoKey(id crypto.Hash) []byte {
return append([]byte(graphPrefixAssetInfo), id[:]...)
}
func graphAssetTotalKey(id crypto.Hash) []byte {
return append([]byte(graphPrefixAssetTotal), id[:]...)
}