44 lines
1.6 KiB
Go
44 lines
1.6 KiB
Go
// 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 ipfsethdb
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import (
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blocks "github.com/ipfs/go-block-format"
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"github.com/ipfs/go-cid"
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_ "github.com/lib/pq" //postgres driver
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"github.com/multiformats/go-multihash"
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)
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// Keccak256ToCid takes a keccak256 hash and returns its cid v1 using the provided codec.
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func Keccak256ToCid(h []byte, codec uint64) (cid.Cid, error) {
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buf, err := multihash.Encode(h, multihash.KECCAK_256)
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if err != nil {
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return cid.Cid{}, err
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}
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return cid.NewCidV1(codec, buf), nil
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}
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// NewBlock takes a keccak256 hash key and the rlp []byte value it was derived from and creates an ipfs block object
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func NewBlock(key, value []byte) (blocks.Block, error) {
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// we are using state codec because we don't know the codec and at this level the codec doesn't matter, the datastore key is multihash-only derived
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c, err := Keccak256ToCid(key, cid.EthStateTrie)
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if err != nil {
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return nil, err
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}
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return blocks.NewBlockWithCid(value, c)
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}
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