88 lines
2.7 KiB
Go
88 lines
2.7 KiB
Go
// VulcanizeDB
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// Copyright © 2021 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 statediff
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import (
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"context"
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"math/big"
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"sync"
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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/ethereum/go-ethereum/statediff/indexer/interfaces"
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)
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// Config contains instantiation parameters for the state diffing service
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type Config struct {
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// The configuration used for the stateDiff Indexer
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IndexerConfig interfaces.Config
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// A unique ID used for this service
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ID string
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// Name for the client this service is running
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ClientName string
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// Whether to enable writing state diffs directly to track blockchain head
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EnableWriteLoop bool
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// Size of the worker pool
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NumWorkers uint
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// Should the statediff service wait until geth has synced to the head of the blockchain?
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WaitForSync bool
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// Context
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Context context.Context
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}
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// Params contains config parameters for the state diff builder
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type Params struct {
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IncludeBlock bool
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IncludeReceipts bool
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IncludeTD bool
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IncludeCode bool
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WatchedAddresses []common.Address
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watchedAddressesLeafPaths [][]byte
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}
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// ComputeWatchedAddressesLeafPaths populates a slice with paths (hex_encoding(Keccak256)) of each of the WatchedAddresses
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func (p *Params) ComputeWatchedAddressesLeafPaths() {
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p.watchedAddressesLeafPaths = make([][]byte, len(p.WatchedAddresses))
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for i, address := range p.WatchedAddresses {
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p.watchedAddressesLeafPaths[i] = keybytesToHex(crypto.Keccak256(address.Bytes()))
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}
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}
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// ParamsWithMutex allows to lock the parameters while they are being updated | read from
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type ParamsWithMutex struct {
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Params
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sync.RWMutex
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}
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// Args bundles the arguments for the state diff builder
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type Args struct {
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OldStateRoot, NewStateRoot, BlockHash common.Hash
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BlockNumber *big.Int
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}
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// https://github.com/ethereum/go-ethereum/blob/master/trie/encoding.go#L97
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func keybytesToHex(str []byte) []byte {
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l := len(str)*2 + 1
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var nibbles = make([]byte, l)
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for i, b := range str {
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nibbles[i*2] = b / 16
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nibbles[i*2+1] = b % 16
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}
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nibbles[l-1] = 16
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return nibbles
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}
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