40 lines
1.2 KiB
Go
40 lines
1.2 KiB
Go
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// Copyright 2019 The go-ethereum Authors
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// This file is part of the go-ethereum library.
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//
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// The go-ethereum library is free software: you can redistribute it and/or modify
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// it under the terms of the GNU Lesser 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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//
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// The go-ethereum library 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 Lesser General Public License for more details.
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//
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// You should have received a copy of the GNU Lesser General Public License
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// along with the go-ethereum library. If not, see <http://www.gnu.org/licenses/>.
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package localstore
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import (
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"github.com/ethereum/go-ethereum/swarm/chunk"
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)
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// Hasser provides Has method to retrieve Chunks
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// from database.
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type Hasser struct {
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db *DB
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}
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// NewHasser returns a new Hasser on database.
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func (db *DB) NewHasser() *Hasser {
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return &Hasser{
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db: db,
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}
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}
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// Has returns true if the chunk is stored in database.
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func (h *Hasser) Has(addr chunk.Address) (bool, error) {
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return h.db.retrievalDataIndex.Has(addressToItem(addr))
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}
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