67 lines
1.9 KiB
Go
67 lines
1.9 KiB
Go
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// VulcanizeDB
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// Copyright © 2019 Vulcanize
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// This program is free software: you can redistribute it and/or modify
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// it under the terms of the GNU Affero General Public License as published by
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// the Free Software Foundation, either version 3 of the License, or
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// (at your option) any later version.
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// This program is distributed in the hope that it will be useful,
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// but WITHOUT ANY WARRANTY; without even the implied warranty of
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// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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// GNU Affero General Public License for more details.
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// You should have received a copy of the GNU Affero General Public License
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// along with this program. If not, see <http://www.gnu.org/licenses/>.
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package storage
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import (
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"github.com/ethereum/go-ethereum/common"
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"github.com/vulcanize/vulcanizedb/libraries/shared/storage/utils"
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"github.com/vulcanize/vulcanizedb/pkg/datastore/postgres"
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)
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type KeysLookup interface {
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Lookup(key common.Hash) (utils.StorageValueMetadata, error)
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SetDB(db *postgres.DB)
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}
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type keysLookup struct {
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loader KeysLoader
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mappings map[common.Hash]utils.StorageValueMetadata
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}
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func NewKeysLookup(loader KeysLoader) KeysLookup {
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return &keysLookup{loader: loader, mappings: make(map[common.Hash]utils.StorageValueMetadata)}
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}
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func (lookup *keysLookup) Lookup(key common.Hash) (utils.StorageValueMetadata, error) {
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metadata, ok := lookup.mappings[key]
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if !ok {
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refreshErr := lookup.refreshMappings()
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if refreshErr != nil {
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return metadata, refreshErr
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}
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metadata, ok = lookup.mappings[key]
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if !ok {
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return metadata, utils.ErrStorageKeyNotFound{Key: key.Hex()}
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}
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}
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return metadata, nil
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}
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func (lookup *keysLookup) refreshMappings() error {
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var err error
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lookup.mappings, err = lookup.loader.LoadMappings()
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if err != nil {
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return err
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}
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lookup.mappings = utils.AddHashedKeys(lookup.mappings)
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return nil
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}
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func (lookup *keysLookup) SetDB(db *postgres.DB) {
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lookup.loader.SetDB(db)
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}
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