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core/state/snapshot: implement storage iterator (#20971)

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* core/state/snapshot: implement storage iterator

* core/state/snapshot, tests: implement helper function

* core/state/snapshot: fix storage issue

If an account is deleted in the tx_1 but recreated in the tx_2,
the it can happen that in this diff layer, both destructedSet
and storageData records this account. In this case, the storage
iterator should be able to iterate the slots belong to new account
but disable further iteration in deeper layers(belong to old account)

* core/state/snapshot: address peter and martin's comment

* core/state: address comments

* core/state/snapshot: fix test
This commit is contained in:
gary rong
2020-04-29 17:53:08 +08:00
committed by GitHub
parent 1264c19f11
commit 26d271dfbb
13 changed files with 1096 additions and 204 deletions
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44
core/state/snapshot/account.go
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@ -24,8 +24,10 @@ import (
"github.com/ethereum/go-ethereum/rlp"
)
// Account is a slim version of a state.Account, where the root and code hash
// are replaced with a nil byte slice for empty accounts.
// Account is a modified version of a state.Account, where the root is replaced
// with a byte slice. This format can be used to represent full-consensus format
// or slim-snapshot format which replaces the empty root and code hash as nil
// byte slice.
type Account struct {
Nonce uint64
Balance *big.Int
@ -33,9 +35,8 @@ type Account struct {
CodeHash []byte
}
// AccountRLP converts a state.Account content into a slim snapshot version RLP
// encoded.
func AccountRLP(nonce uint64, balance *big.Int, root common.Hash, codehash []byte) []byte {
// SlimAccount converts a state.Account content into a slim snapshot account
func SlimAccount(nonce uint64, balance *big.Int, root common.Hash, codehash []byte) Account {
slim := Account{
Nonce: nonce,
Balance: balance,
@ -46,9 +47,40 @@ func AccountRLP(nonce uint64, balance *big.Int, root common.Hash, codehash []byt
if !bytes.Equal(codehash, emptyCode[:]) {
slim.CodeHash = codehash
}
data, err := rlp.EncodeToBytes(slim)
return slim
}
// SlimAccountRLP converts a state.Account content into a slim snapshot
// version RLP encoded.
func SlimAccountRLP(nonce uint64, balance *big.Int, root common.Hash, codehash []byte) []byte {
data, err := rlp.EncodeToBytes(SlimAccount(nonce, balance, root, codehash))
if err != nil {
panic(err)
}
return data
}
// FullAccount decodes the data on the 'slim RLP' format and return
// the consensus format account.
func FullAccount(data []byte) (Account, error) {
var account Account
if err := rlp.DecodeBytes(data, &account); err != nil {
return Account{}, err
}
if len(account.Root) == 0 {
account.Root = emptyRoot[:]
}
if len(account.CodeHash) == 0 {
account.CodeHash = emptyCode[:]
}
return account, nil
}
// FullAccountRLP converts data on the 'slim RLP' format into the full RLP-format.
func FullAccountRLP(data []byte) ([]byte, error) {
account, err := FullAccount(data)
if err != nil {
return nil, err
}
return rlp.EncodeToBytes(account)
}