58 lines
1.9 KiB
Go
58 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 shared
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import (
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"github.com/ethereum/go-ethereum/common"
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"github.com/ipfs/go-cid"
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blockstore "github.com/ipfs/go-ipfs-blockstore"
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dshelp "github.com/ipfs/go-ipfs-ds-help"
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"github.com/multiformats/go-multihash"
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)
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// HandleZeroAddrPointer will return an empty string for a nil address pointer
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func HandleZeroAddrPointer(to *common.Address) string {
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if to == nil {
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return ""
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}
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return to.Hex()
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}
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// HandleZeroAddr will return an empty string for a 0 value address
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func HandleZeroAddr(to common.Address) string {
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if to.Hex() == "0x0000000000000000000000000000000000000000" {
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return ""
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}
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return to.Hex()
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}
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// MultihashKeyFromCID converts a cid into a blockstore-prefixed multihash db key string
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func MultihashKeyFromCID(c cid.Cid) string {
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dbKey := dshelp.MultihashToDsKey(c.Hash())
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return blockstore.BlockPrefix.String() + dbKey.String()
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}
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// MultihashKeyFromKeccak256 converts keccak256 hash bytes into a blockstore-prefixed multihash db key string
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func MultihashKeyFromKeccak256(hash common.Hash) (string, error) {
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mh, err := multihash.Encode(hash.Bytes(), multihash.KECCAK_256)
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if err != nil {
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return "", err
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}
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dbKey := dshelp.MultihashToDsKey(mh)
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return blockstore.BlockPrefix.String() + dbKey.String(), nil
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}
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