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/
storage.go
72 lines (62 loc) · 1.78 KB
/
storage.go
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// Copyright (C) 2023, Ava Labs, Inc. All rights reserved.
// See the file LICENSE for licensing terms.
package viewer
import (
"context"
"encoding/binary"
"encoding/json"
"github.com/ava-labs/avalanchego/database"
"github.com/ava-labs/indexvm/examples/nftdisco/thegraph"
)
const (
filterPrefix = 0x0
nftPrefix = 0x1
)
func StoreFilter(ctx context.Context, db database.Database, f *filter) error {
b, err := json.Marshal(f)
if err != nil {
return err
}
k := binary.BigEndian.AppendUint64([]byte{filterPrefix}, uint64(f.CreatedAt))
return db.Put(k, b)
}
func RemoveFilter(ctx context.Context, db database.Database, t int64) error {
k := binary.BigEndian.AppendUint64([]byte{filterPrefix}, uint64(t))
return db.Delete(k)
}
func LoadFilters(ctx context.Context, db database.Database) ([]*filter, error) {
filters := []*filter{}
iter := db.NewIteratorWithPrefix([]byte{filterPrefix})
defer iter.Release()
for iter.Next() {
var f filter
if err := json.Unmarshal(iter.Value(), &f); err != nil {
return nil, err
}
filters = append(filters, &f)
}
return filters, iter.Error()
}
func StoreNFT(ctx context.Context, db database.Database, n *thegraph.NFT) error {
b, err := json.Marshal(n)
if err != nil {
return err
}
return db.Put(append([]byte{nftPrefix}, n.ID()...), b)
}
func RemoveNFT(ctx context.Context, db database.Database, id string) error {
return db.Delete(append([]byte{nftPrefix}, id...))
}
func LoadNFTs(ctx context.Context, db database.Database) ([]*thegraph.NFT, error) {
nfts := []*thegraph.NFT{}
iter := db.NewIteratorWithPrefix([]byte{nftPrefix})
defer iter.Release()
for iter.Next() {
var nft thegraph.NFT
if err := json.Unmarshal(iter.Value(), &nft); err != nil {
return nil, err
}
nfts = append(nfts, &nft)
}
return nfts, iter.Error()
}