From 16fc9c72778bf8eb37a017343465e100d1f79e70 Mon Sep 17 00:00:00 2001
From: Alex Sharov <AskAlexSharov@gmail.com>
Date: Sat, 27 Aug 2022 15:36:42 +0700
Subject: [PATCH] erigon22: HistoryReader22 #5203

---
 core/state/history_reader_22.go | 159 ++++++++++++++++++++++++++++++++
 core/state/history_reader_23.go |   2 +-
 turbo/stages/mock_sentry.go     |   4 +-
 3 files changed, 162 insertions(+), 3 deletions(-)
 create mode 100644 core/state/history_reader_22.go

diff --git a/core/state/history_reader_22.go b/core/state/history_reader_22.go
new file mode 100644
index 000000000..b373d32bd
--- /dev/null
+++ b/core/state/history_reader_22.go
@@ -0,0 +1,159 @@
+package state
+
+import (
+	"fmt"
+
+	"github.com/ledgerwatch/erigon-lib/kv"
+	libstate "github.com/ledgerwatch/erigon-lib/state"
+	"github.com/ledgerwatch/erigon/common"
+	"github.com/ledgerwatch/erigon/core/types/accounts"
+)
+
+// HistoryReader22 Implements StateReader and StateWriter
+type HistoryReader22 struct {
+	ac    *libstate.Aggregator22Context
+	ri    *libstate.ReadIndices
+	txNum uint64
+	trace bool
+	tx    kv.Tx
+}
+
+func NewHistoryReader22(ac *libstate.Aggregator22Context, ri *libstate.ReadIndices) *HistoryReader22 {
+	return &HistoryReader22{ac: ac, ri: ri}
+}
+
+func (hr *HistoryReader22) SetTx(tx kv.Tx) { hr.tx = tx }
+
+func (hr *HistoryReader22) SetRwTx(tx kv.RwTx) {
+	hr.ri.SetTx(tx)
+}
+
+func (hr *HistoryReader22) SetTxNum(txNum uint64) {
+	hr.txNum = txNum
+	if hr.ri != nil {
+		hr.ri.SetTxNum(txNum)
+	}
+}
+
+func (hr *HistoryReader22) FinishTx() error {
+	return hr.ri.FinishTx()
+}
+
+func (hr *HistoryReader22) SetTrace(trace bool) {
+	hr.trace = trace
+}
+
+func (hr *HistoryReader22) ReadAccountData(address common.Address) (*accounts.Account, error) {
+	if hr.ri != nil {
+		if err := hr.ri.ReadAccountData(address.Bytes()); err != nil {
+			return nil, err
+		}
+	}
+	enc, ok, err := hr.ac.ReadAccountDataNoState(address.Bytes(), hr.txNum)
+	if err != nil {
+		return nil, err
+	}
+	if !ok {
+		enc, err = hr.tx.GetOne(kv.PlainState, address.Bytes())
+		if err != nil {
+			return nil, err
+		}
+	}
+	if len(enc) == 0 {
+		if hr.trace {
+			fmt.Printf("ReadAccountData [%x] => []\n", address)
+		}
+		return nil, nil
+	}
+	var a accounts.Account
+	if err := accounts.Deserialise2(&a, enc); err != nil {
+		return nil, fmt.Errorf("ReadAccountData(%x): %w", address, err)
+	}
+
+	if hr.trace {
+		fmt.Printf("ReadAccountData [%x] => [nonce: %d, balance: %d, codeHash: %x]\n", address, a.Nonce, &a.Balance, a.CodeHash)
+	}
+	return &a, nil
+}
+
+func (hr *HistoryReader22) ReadAccountStorage(address common.Address, incarnation uint64, key *common.Hash) ([]byte, error) {
+	if hr.ri != nil {
+		if err := hr.ri.ReadAccountStorage(address.Bytes(), key.Bytes()); err != nil {
+			return nil, err
+		}
+	}
+	enc, ok, err := hr.ac.ReadAccountStorageNoState(address.Bytes(), key.Bytes(), hr.txNum)
+	if err != nil {
+		return nil, err
+	}
+	if !ok {
+		k := append(address.Bytes(), key.Bytes()...)
+		enc, err = hr.tx.GetOne(kv.PlainState, k)
+		if err != nil {
+			return nil, err
+		}
+	}
+	if hr.trace {
+		if enc == nil {
+			fmt.Printf("ReadAccountStorage [%x] [%x] => []\n", address, key.Bytes())
+		} else {
+			fmt.Printf("ReadAccountStorage [%x] [%x] => [%x]\n", address, key.Bytes(), enc)
+		}
+	}
+	if enc == nil {
+		return nil, nil
+	}
+	return enc, nil
+}
+
+func (hr *HistoryReader22) ReadAccountCode(address common.Address, incarnation uint64, codeHash common.Hash) ([]byte, error) {
+	if hr.ri != nil {
+		if err := hr.ri.ReadAccountCode(address.Bytes()); err != nil {
+			return nil, err
+		}
+	}
+	enc, ok, err := hr.ac.ReadAccountCodeNoState(address.Bytes(), hr.txNum)
+	if err != nil {
+		return nil, err
+	}
+	if !ok {
+		enc, err = hr.tx.GetOne(kv.Code, address.Bytes())
+		if err != nil {
+			return nil, err
+		}
+	}
+	if hr.trace {
+		fmt.Printf("ReadAccountCode [%x] => [%x]\n", address, enc)
+	}
+	return enc, nil
+}
+
+func (hr *HistoryReader22) ReadAccountCodeSize(address common.Address, incarnation uint64, codeHash common.Hash) (int, error) {
+	if hr.ri != nil {
+		if err := hr.ri.ReadAccountCodeSize(address.Bytes()); err != nil {
+			return 0, err
+		}
+	}
+	size, ok, err := hr.ac.ReadAccountCodeSizeNoState(address.Bytes(), hr.txNum)
+	if err != nil {
+		return 0, err
+	}
+	if !ok {
+		enc, err := hr.tx.GetOne(kv.Code, address.Bytes())
+		if err != nil {
+			return 0, err
+		}
+		size = len(enc)
+	}
+	if err != nil {
+		return 0, err
+	}
+	if hr.trace {
+		fmt.Printf("ReadAccountCodeSize [%x] => [%d]\n", address, size)
+	}
+	return size, nil
+}
+
+func (hr *HistoryReader22) ReadAccountIncarnation(address common.Address) (uint64, error) {
+	return 0, nil
+}
diff --git a/core/state/history_reader_23.go b/core/state/history_reader_23.go
index 1f53a779d..97318c223 100644
--- a/core/state/history_reader_23.go
+++ b/core/state/history_reader_23.go
@@ -19,7 +19,7 @@ func bytesToUint64(buf []byte) (x uint64) {
 	return
 }
 
-// Implements StateReader and StateWriter
+// HistoryReader23 Implements StateReader and StateWriter
 type HistoryReader23 struct {
 	ac    *libstate.AggregatorContext
 	ri    *libstate.ReadIndices
diff --git a/turbo/stages/mock_sentry.go b/turbo/stages/mock_sentry.go
index 15636721f..05cd243ab 100644
--- a/turbo/stages/mock_sentry.go
+++ b/turbo/stages/mock_sentry.go
@@ -648,9 +648,9 @@ func (ms *MockSentry) HeaderDownload() *headerdownload.HeaderDownload {
 
 func (ms *MockSentry) NewHistoricalStateReader(blockNum uint64, tx kv.Tx) *state.IntraBlockState {
 	if ms.HistoryV2 {
-		agg, _ := libstate.NewAggregator(path.Join(ms.Dirs.DataDir, "agg22"), stagedsync.AggregationStep)
+		agg, _ := libstate.NewAggregator22(path.Join(ms.Dirs.DataDir, "agg22"), stagedsync.AggregationStep)
 		defer agg.Close()
-		r := state.NewHistoryReader23(agg.MakeContext(), nil)
+		r := state.NewHistoryReader22(agg.MakeContext(), nil)
 		r.SetTx(tx)
 		r.SetTxNum(ms.txNums.MinOf(blockNum))
 		return state.New(r)