cerc-io/laconicd
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Filling in OpenTrie and OpenStorageTrie

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This commit is contained in:
Alexey Akhunov 2018-06-15 14:26:06 +01:00
parent 00ec31f408
commit 1756896894
1 changed files with 29 additions and 3 deletions
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32
main.go
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@ -1,6 +1,7 @@
package main
import (
"bytes"
"fmt"
eth_common "github.com/ethereum/go-ethereum/common"
@ -9,6 +10,7 @@ import (
eth_trie "github.com/ethereum/go-ethereum/trie"
dbm "github.com/tendermint/tmlibs/db"
"github.com/tendermint/go-amino"
"github.com/cosmos/cosmos-sdk/store"
"github.com/cosmos/cosmos-sdk/types"
)
@ -20,6 +22,12 @@ var (
StorageKey = types.NewKVStoreKey("storage")
)
// This is what stored in the lookupDb
type LookupValue struct {
VersionId int64
Address []byte
}
// Implementation of eth_state.Database
type OurDatabase struct {
stateStore store.CommitMultiStore // For the history of accounts <balance, nonce, storage root hash, code hash>
@ -28,6 +36,7 @@ type OurDatabase struct {
// This mapping exists so that we can implement OpenTrie function of the state.Database interface
// Also mapping [storage_trie_root_hash] => <contract_address, version_id>
// This mapping exists so that we can implement OpenStorageTrie function of the state.Database interface
cdc *amino.Codec // Amino codec to encode the values forthe lookupDb
}
func OurNewDatabase(stateDb, lookupDb dbm.DB) *OurDatabase {
@ -36,16 +45,33 @@ func OurNewDatabase(stateDb, lookupDb dbm.DB) *OurDatabase {
od.stateStore.MountStoreWithDB(AccountsKey, types.StoreTypeIAVL, nil)
od.stateStore.MountStoreWithDB(StorageKey, types.StoreTypeIAVL, nil)
od.lookupDb = lookupDb
od.cdc = amino.NewCodec()
return od
}
func (od *OurDatabase) OpenTrie(root eth_common.Hash) (eth_state.Trie, error) {
// Need to map root hash to the CommitID to be able to load the trie
return &OurTrie{}, nil
// Look up version id to use
val := od.lookupDb.Get(root[:])
var lv LookupValue
_, err := od.cdc.UnmarshalBinaryReader(bytes.NewBuffer(val), &lv, 0)
if err != nil {
return nil, err
}
od.stateStore.LoadVersion(lv.VersionId)
st := od.stateStore.GetCommitKVStore(AccountsKey)
return &OurTrie{st: st, prefix: nil}, nil
}
func (od *OurDatabase) OpenStorageTrie(addrHash, root eth_common.Hash) (eth_state.Trie, error) {
return nil, nil
val := od.lookupDb.Get(root[:])
var lv LookupValue
_, err := od.cdc.UnmarshalBinaryReader(bytes.NewBuffer(val), &lv, 0)
if err != nil {
return nil, err
}
od.stateStore.LoadVersion(lv.VersionId)
st := od.stateStore.GetCommitKVStore(StorageKey)
return &OurTrie{st: st, prefix: lv.Address}, nil
}
func (od *OurDatabase) CopyTrie(eth_state.Trie) eth_state.Trie {