erigon-pulse/turbo/snapshotsync/block_reader.go

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package snapshotsync
import (
"bytes"
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"context"
"encoding/binary"
"fmt"
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"github.com/ledgerwatch/erigon-lib/gointerfaces"
"github.com/ledgerwatch/erigon-lib/gointerfaces/remote"
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"github.com/ledgerwatch/erigon-lib/kv"
"github.com/ledgerwatch/erigon/common"
"github.com/ledgerwatch/erigon/core/rawdb"
"github.com/ledgerwatch/erigon/core/types"
"github.com/ledgerwatch/erigon/rlp"
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)
// BlockReader can read blocks from db and snapshots
type BlockReader struct {
}
func NewBlockReader() *BlockReader {
return &BlockReader{}
}
func (back *BlockReader) BlockWithSenders(ctx context.Context, tx kv.Tx, hash common.Hash, blockHeight uint64) (block *types.Block, senders []common.Address, err error) {
canonicalHash, err := rawdb.ReadCanonicalHash(tx, blockHeight)
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if err != nil {
return nil, nil, fmt.Errorf("requested non-canonical hash %x. canonical=%x", hash, canonicalHash)
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}
if canonicalHash == hash {
block, senders, err = rawdb.ReadBlockWithSenders(tx, hash, blockHeight)
if err != nil {
return nil, nil, err
}
return block, senders, nil
}
return rawdb.NonCanonicalBlockWithSenders(tx, hash, blockHeight)
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}
type RemoteBlockReader struct {
client remote.ETHBACKENDClient
}
func NewRemoteBlockReader(client remote.ETHBACKENDClient) *RemoteBlockReader {
return &RemoteBlockReader{client}
}
func (back *RemoteBlockReader) BlockWithSenders(ctx context.Context, _ kv.Tx, hash common.Hash, blockHeight uint64) (block *types.Block, senders []common.Address, err error) {
reply, err := back.client.Block(ctx, &remote.BlockRequest{BlockHash: gointerfaces.ConvertHashToH256(hash), BlockHeight: blockHeight})
if err != nil {
return nil, nil, err
}
block = &types.Block{}
err = rlp.Decode(bytes.NewReader(reply.BlockRlp), block)
if err != nil {
return nil, nil, err
}
senders = make([]common.Address, len(reply.Senders)/20)
for i := range senders {
senders[i].SetBytes(reply.Senders[i*20 : (i+1)*20])
}
if len(senders) == block.Transactions().Len() { //it's fine if no senders provided - they can be lazy recovered
block.SendersToTxs(senders)
}
return block, senders, nil
}
// BlockReaderWithSnapshots can read blocks from db and snapshots
type BlockReaderWithSnapshots struct {
sn *AllSnapshots
}
func NewBlockReaderWithSnapshots(snapshots *AllSnapshots) *BlockReaderWithSnapshots {
return &BlockReaderWithSnapshots{sn: snapshots}
}
func (back *BlockReaderWithSnapshots) BlockWithSenders(ctx context.Context, tx kv.Tx, hash common.Hash, blockHeight uint64) (block *types.Block, senders []common.Address, err error) {
sn, ok := back.sn.Blocks(blockHeight)
if !ok {
canonicalHash, err := rawdb.ReadCanonicalHash(tx, blockHeight)
if err != nil {
return nil, nil, fmt.Errorf("requested non-canonical hash %x. canonical=%x", hash, canonicalHash)
}
if canonicalHash == hash {
block, senders, err = rawdb.ReadBlockWithSenders(tx, hash, blockHeight)
if err != nil {
return nil, nil, err
}
return block, senders, nil
}
return rawdb.NonCanonicalBlockWithSenders(tx, hash, blockHeight)
}
buf := make([]byte, 16)
n := binary.PutUvarint(buf, blockHeight)
headerOffset := sn.Headers.Idx.Lookup2(sn.Headers.Idx.Lookup(buf[:n]))
bodyOffset := sn.Bodies.Idx.Lookup2(sn.Bodies.Idx.Lookup(buf[:n]))
gg := sn.Headers.Segment.MakeGetter()
gg.Reset(headerOffset)
buf, _ = gg.Next(buf[:0])
h := &types.Header{}
if err = rlp.DecodeBytes(buf, h); err != nil {
return nil, nil, err
}
gg = sn.Bodies.Segment.MakeGetter()
gg.Reset(bodyOffset)
buf, _ = gg.Next(buf[:0])
b := &types.BodyForStorage{}
if err = rlp.DecodeBytes(buf, b); err != nil {
return nil, nil, err
}
n = binary.PutUvarint(buf, b.BaseTxId)
txnOffset := sn.Transactions.Idx.Lookup2(sn.Transactions.Idx.Lookup(buf[:n]))
gg = sn.Transactions.Segment.MakeGetter()
gg.Reset(txnOffset)
reader := bytes.NewReader(nil)
stream := rlp.NewStream(reader, 0)
txs := make([]types.Transaction, b.TxAmount)
senders = make([]common.Address, b.TxAmount)
for i := uint32(0); i < b.TxAmount; i++ {
buf, _ = gg.Next(buf[:0])
senders[i].SetBytes(buf[1 : 1+20])
txRlp := buf[1+20:]
reader.Reset(txRlp)
stream.Reset(reader, 0)
txs[i], err = types.DecodeTransaction(stream)
if err != nil {
return nil, nil, err
}
}
block = types.NewBlockFromStorage(hash, h, txs, b.Uncles)
if len(senders) != block.Transactions().Len() {
return block, senders, nil // no senders is fine - will recover them on the fly
}
block.SendersToTxs(senders)
return block, senders, nil
}