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core/state: access trie through Database interface, track errors (#14589)

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With this commit, core/state's access to the underlying key/value database is
mediated through an interface. Database errors are tracked in StateDB and
returned by CommitTo or the new Error method.

Motivation for this change: We can remove the light client's duplicated copy of
core/state. The light client now supports node iteration, so tracing and storage
enumeration can work with the light client (not implemented in this commit).
This commit is contained in:
Felix Lange
2017-06-27 15:57:06 +02:00
committed by GitHub
parent bb366271fe
commit 9e5f03b6c4
49 changed files with 810 additions and 1664 deletions
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13
core/state/iterator.go
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@ -19,7 +19,6 @@ package state
import (
"bytes"
"fmt"
"math/big"
"github.com/ethereum/go-ethereum/common"
"github.com/ethereum/go-ethereum/rlp"
@ -105,16 +104,11 @@ func (it *NodeIterator) step() error {
return nil
}
// Otherwise we've reached an account node, initiate data iteration
var account struct {
Nonce uint64
Balance *big.Int
Root common.Hash
CodeHash []byte
}
var account Account
if err := rlp.Decode(bytes.NewReader(it.stateIt.LeafBlob()), &account); err != nil {
return err
}
dataTrie, err := trie.New(account.Root, it.state.db)
dataTrie, err := it.state.db.OpenStorageTrie(common.BytesToHash(it.stateIt.LeafKey()), account.Root)
if err != nil {
return err
}
@ -124,7 +118,8 @@ func (it *NodeIterator) step() error {
}
if !bytes.Equal(account.CodeHash, emptyCodeHash) {
it.codeHash = common.BytesToHash(account.CodeHash)
it.code, err = it.state.db.Get(account.CodeHash)
addrHash := common.BytesToHash(it.stateIt.LeafKey())
it.code, err = it.state.db.ContractCode(addrHash, common.BytesToHash(account.CodeHash))
if err != nil {
return fmt.Errorf("code %x: %v", account.CodeHash, err)
}