Simplifications
This commit is contained in:
Alexey Akhunov
parent
34288a91c9
commit
2be9984327
95
main.go
95
main.go
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@ -1,7 +1,7 @@
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package main
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import (
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"bytes"
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"encoding/binary"
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"fmt"
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"io"
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"os"
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@ -30,25 +30,23 @@ var (
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CodeKey = types.NewKVStoreKey("code")
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)
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// This is what stored in the lookupDb
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type LookupValue struct {
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type CommitHashPreimage struct {
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VersionId int64
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Prefix []byte
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}
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// Implementation of eth_state.Database
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type OurDatabase struct {
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stateStore store.CommitMultiStore // For the history of accounts <balance, nonce, storage root hash, code hash>
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// Also, for the history of contract data (effects of SSTORE instruction)
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lookupDb dbm.DB // Maping [trie_root_hash] => <version_id>.
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// This mapping exists so that we can implement OpenTrie and OpenStorageTrie functions
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// of the state.Database interface
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accountsCache store.CacheKVStore
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storageCache store.CacheKVStore
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codeDb dbm.DB // Mapping [codeHash] -> <code>
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addrPreimageDb dbm.DB // Mapping [contract_address_hash] -> <contract_address>
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cdc *amino.Codec // Amino codec to encode the values forthe lookupDb
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tracing bool
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}
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func OurNewDatabase(stateDb, lookupDb, addrPreimageDb, codeDb dbm.DB) (*OurDatabase, error) {
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func OurNewDatabase(stateDb, codeDb dbm.DB) (*OurDatabase, error) {
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od := &OurDatabase{}
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od.stateStore = store.NewCommitMultiStore(stateDb)
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od.stateStore.MountStoreWithDB(AccountsKey, types.StoreTypeIAVL, nil)
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@ -56,57 +54,45 @@ func OurNewDatabase(stateDb, lookupDb, addrPreimageDb, codeDb dbm.DB) (*OurDatab
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if err := od.stateStore.LoadLatestVersion(); err != nil {
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return nil, err
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}
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od.lookupDb = lookupDb
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od.addrPreimageDb = addrPreimageDb
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od.codeDb = codeDb
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od.cdc = amino.NewCodec()
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return od, nil
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}
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// root is not interpreted as a hash, but as an encoding of version
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func (od *OurDatabase) OpenTrie(root eth_common.Hash) (eth_state.Trie, error) {
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// Look up version id to use
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hasData := root != (eth_common.Hash{})
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var versionId int64
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if hasData {
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val := od.lookupDb.Get(root[:])
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if val == nil {
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return nil, fmt.Errorf("Could not find version with root hash %x", root[:])
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}
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var versionId int64
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_, err := od.cdc.UnmarshalBinaryReader(bytes.NewBuffer(val), &versionId, 0)
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if err != nil {
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return nil, err
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}
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if od.tracing {
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fmt.Printf("Loading version %d\n", versionId)
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}
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// First 8 bytes encode version
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versionId = int64(binary.BigEndian.Uint64(root[:8]))
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if err := od.stateStore.LoadVersion(versionId); err != nil {
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return nil, err
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}
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}
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st := od.stateStore.GetCommitKVStore(AccountsKey)
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return &OurTrie{od: od, st: st, prefix: nil, hasData: hasData}, nil
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if od.accountsCache == nil {
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od.accountsCache = store.NewCacheKVStore(od.stateStore.GetCommitKVStore(AccountsKey))
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}
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return &OurTrie{od: od, versionId: versionId, st: od.accountsCache, prefix: nil, hasData: hasData}, nil
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}
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func (od *OurDatabase) OpenStorageTrie(addrHash, root eth_common.Hash) (eth_state.Trie, error) {
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hasData := root != (eth_common.Hash{})
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var versionId int64
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if hasData {
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val := od.lookupDb.Get(root[:])
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if val == nil {
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return nil, fmt.Errorf("Could not find version with root hash %x", root[:])
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}
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var versionId int64
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_, err := od.cdc.UnmarshalBinaryReader(bytes.NewBuffer(val), &versionId, 0)
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if err != nil {
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return nil, err
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}
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// First 8 bytes encode version
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versionId = int64(binary.BigEndian.Uint64(root[:8]))
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// This might not be required,
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// we just need to check that accounts and storage are consistent
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if err := od.stateStore.LoadVersion(versionId); err != nil {
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return nil, err
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}
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}
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st := od.stateStore.GetCommitKVStore(StorageKey)
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return &OurTrie{od:od, st: st, prefix: addrHash[:], hasData: hasData}, nil
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if od.storageCache == nil {
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od.storageCache = store.NewCacheKVStore(od.stateStore.GetCommitKVStore(StorageKey))
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}
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return &OurTrie{od:od, versionId: versionId, st: od.storageCache, prefix: addrHash[:], hasData: hasData}, nil
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}
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func (od *OurDatabase) CopyTrie(eth_state.Trie) eth_state.Trie {
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@ -130,8 +116,9 @@ func (od *OurDatabase) TrieDB() *eth_trie.Database {
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// Implementation of eth_state.Trie
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type OurTrie struct {
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od *OurDatabase
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versionId int64
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// This is essentially part of the KVStore for a specific prefix
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st store.CommitKVStore
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st store.KVStore
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prefix []byte
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hasData bool
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}
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@ -173,16 +160,18 @@ func (ot *OurTrie) Commit(onleaf eth_trie.LeafCallback) (eth_common.Hash, error)
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if !ot.hasData {
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return eth_common.Hash{}, nil
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}
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commitId := ot.st.Commit()
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fmt.Printf("Committed version %d\n", commitId.Version)
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var hash eth_common.Hash
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copy(hash[:], commitId.Hash)
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b, err := ot.od.cdc.MarshalBinary(commitId.Version)
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if err != nil {
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return hash, err
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var commitHash eth_common.Hash
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// We assume here that the next committed version will be ot.versionId+1
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binary.BigEndian.PutUint64(commitHash[:8], uint64(ot.versionId+1))
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if ot.od.accountsCache != nil {
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ot.od.accountsCache.Write()
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ot.od.accountsCache = nil
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}
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ot.od.lookupDb.Set(hash[:], b)
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return hash, nil
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if ot.od.storageCache != nil {
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ot.od.storageCache.Write()
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ot.od.storageCache = nil
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}
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return commitHash, nil
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}
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func (ot *OurTrie) Hash() eth_common.Hash {
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@ -204,10 +193,8 @@ func (ot *OurTrie) Prove(key []byte, fromLevel uint, proofDb eth_ethdb.Putter) e
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func main() {
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fmt.Printf("Instantiating state.Database\n")
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stateDb := dbm.NewDB("state" /* name */, dbm.MemDBBackend, "" /* dir */)
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lookupDb := dbm.NewDB("lookup" /* name */, dbm.MemDBBackend, "" /* dir */)
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addrPreimageDb := dbm.NewDB("addrPreimage" /* name */, dbm.MemDBBackend, "" /* dir */)
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codeDb := dbm.NewDB("code" /* name */, dbm.MemDBBackend, "" /* dir */)
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d, err := OurNewDatabase(stateDb, lookupDb, addrPreimageDb, codeDb)
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d, err := OurNewDatabase(stateDb, codeDb)
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if err != nil {
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panic(err)
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}
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@ -234,6 +221,8 @@ func main() {
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if err != nil {
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panic(err)
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}
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commitID := d.stateStore.Commit()
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fmt.Printf("CommitID after genesis: %v\n", commitID)
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fmt.Printf("Genesis state root hash: %x\n", genesis_root[:])
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// File with blockchain data exported from geth by using "geth expordb" command
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input, err := os.Open("/Users/alexeyakhunov/mygit/blockchain")
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@ -269,14 +258,17 @@ func main() {
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// Apply mining rewards to the statedb
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accumulateRewards(chainConfig, statedb, header, block.Uncles())
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// Commit block
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prev_root, err := statedb.Commit(chainConfig.IsEIP158(block.Number()) /* deleteEmptyObjects */)
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prev_root, err = statedb.Commit(chainConfig.IsEIP158(block.Number()) /* deleteEmptyObjects */)
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if err != nil {
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panic(fmt.Errorf("at block %d: %v", n, err))
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}
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//fmt.Printf("State root after block %d: %x\n", block.NumberU64(), prev_root)
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d.stateStore.Commit()
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//fmt.Printf("CommitID after block %d: %v\n", block.NumberU64(), commitID)
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switch block.NumberU64() {
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case 1:
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case 500:
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root500 = prev_root
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case 502:
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case 501:
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root501 = prev_root
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}
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n++
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@ -290,6 +282,7 @@ func main() {
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fmt.Printf("Balance of one of the genesis investors: %s\n", genesis_state.GetBalance(eth_common.HexToAddress("0x756F45E3FA69347A9A973A725E3C98bC4db0b5a0")))
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miner501 := eth_common.HexToAddress("0x35e8e5dC5FBd97c5b421A80B596C030a2Be2A04D") // Miner of the block 501
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// Try to create a new statedb from root of the block 500
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fmt.Printf("root500: %x\n", root500[:])
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state500, err := eth_state.New(root500, d)
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if err != nil {
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panic(err)
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