forked from cerc-io/ipld-eth-server
66 lines
2.8 KiB
Go
66 lines
2.8 KiB
Go
// VulcanizeDB
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// Copyright © 2018 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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"math/big"
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"github.com/ethereum/go-ethereum/common"
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"github.com/ethereum/go-ethereum/crypto"
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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 Mappings 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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const (
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IndexZero = "0000000000000000000000000000000000000000000000000000000000000000"
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IndexOne = "0000000000000000000000000000000000000000000000000000000000000001"
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IndexTwo = "0000000000000000000000000000000000000000000000000000000000000002"
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IndexThree = "0000000000000000000000000000000000000000000000000000000000000003"
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IndexFour = "0000000000000000000000000000000000000000000000000000000000000004"
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IndexFive = "0000000000000000000000000000000000000000000000000000000000000005"
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IndexSix = "0000000000000000000000000000000000000000000000000000000000000006"
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IndexSeven = "0000000000000000000000000000000000000000000000000000000000000007"
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IndexEight = "0000000000000000000000000000000000000000000000000000000000000008"
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IndexNine = "0000000000000000000000000000000000000000000000000000000000000009"
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IndexTen = "0000000000000000000000000000000000000000000000000000000000000010"
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IndexEleven = "0000000000000000000000000000000000000000000000000000000000000011 "
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)
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func GetMapping(indexOnContract, key string) common.Hash {
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keyBytes := common.FromHex("0x" + key + indexOnContract)
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encoded := crypto.Keccak256(keyBytes)
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return common.BytesToHash(encoded)
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}
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func GetNestedMapping(indexOnContract, primaryKey, secondaryKey string) common.Hash {
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primaryMappingIndex := crypto.Keccak256(common.FromHex(primaryKey + indexOnContract))
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secondaryMappingIndex := crypto.Keccak256(common.FromHex(secondaryKey), primaryMappingIndex)
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return common.BytesToHash(secondaryMappingIndex)
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}
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func GetIncrementedKey(original common.Hash, incrementBy int64) common.Hash {
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originalMappingAsInt := original.Big()
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incremented := big.NewInt(0).Add(originalMappingAsInt, big.NewInt(incrementBy))
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return common.BytesToHash(incremented.Bytes())
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}
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