1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
package prefetcher
import (
"context"
"math"
"github.com/ethereum-optimism/optimism/op-node/eth"
"github.com/ethereum-optimism/optimism/op-service/backoff"
"github.com/ethereum/go-ethereum/common"
"github.com/ethereum/go-ethereum/core/types"
"github.com/ethereum/go-ethereum/log"
)
const maxAttempts = math.MaxInt // Succeed or die trying
type RetryingL1Source struct {
logger log.Logger
source L1Source
strategy backoff.Strategy
}
func NewRetryingL1Source(logger log.Logger, source L1Source) *RetryingL1Source {
return &RetryingL1Source{
logger: logger,
source: source,
strategy: backoff.Exponential(),
}
}
func (s *RetryingL1Source) InfoByHash(ctx context.Context, blockHash common.Hash) (eth.BlockInfo, error) {
var info eth.BlockInfo
err := backoff.DoCtx(ctx, maxAttempts, s.strategy, func() error {
res, err := s.source.InfoByHash(ctx, blockHash)
if err != nil {
s.logger.Warn("Failed to retrieve info", "hash", blockHash, "err", err)
return err
}
info = res
return nil
})
return info, err
}
func (s *RetryingL1Source) InfoAndTxsByHash(ctx context.Context, blockHash common.Hash) (eth.BlockInfo, types.Transactions, error) {
var info eth.BlockInfo
var txs types.Transactions
err := backoff.DoCtx(ctx, maxAttempts, s.strategy, func() error {
i, t, err := s.source.InfoAndTxsByHash(ctx, blockHash)
if err != nil {
s.logger.Warn("Failed to retrieve l1 info and txs", "hash", blockHash, "err", err)
return err
}
info = i
txs = t
return nil
})
return info, txs, err
}
func (s *RetryingL1Source) FetchReceipts(ctx context.Context, blockHash common.Hash) (eth.BlockInfo, types.Receipts, error) {
var info eth.BlockInfo
var rcpts types.Receipts
err := backoff.DoCtx(ctx, maxAttempts, s.strategy, func() error {
i, r, err := s.source.FetchReceipts(ctx, blockHash)
if err != nil {
s.logger.Warn("Failed to fetch receipts", "hash", blockHash, "err", err)
return err
}
info = i
rcpts = r
return nil
})
return info, rcpts, err
}
var _ L1Source = (*RetryingL1Source)(nil)
type RetryingL2Source struct {
logger log.Logger
source L2Source
strategy backoff.Strategy
}
func (s *RetryingL2Source) InfoAndTxsByHash(ctx context.Context, blockHash common.Hash) (eth.BlockInfo, types.Transactions, error) {
var info eth.BlockInfo
var txs types.Transactions
err := backoff.DoCtx(ctx, maxAttempts, s.strategy, func() error {
i, t, err := s.source.InfoAndTxsByHash(ctx, blockHash)
if err != nil {
s.logger.Warn("Failed to retrieve l2 info and txs", "hash", blockHash, "err", err)
return err
}
info = i
txs = t
return nil
})
return info, txs, err
}
func (s *RetryingL2Source) NodeByHash(ctx context.Context, hash common.Hash) ([]byte, error) {
var node []byte
err := backoff.DoCtx(ctx, maxAttempts, s.strategy, func() error {
n, err := s.source.NodeByHash(ctx, hash)
if err != nil {
s.logger.Warn("Failed to retrieve node", "hash", hash, "err", err)
return err
}
node = n
return nil
})
return node, err
}
func (s *RetryingL2Source) CodeByHash(ctx context.Context, hash common.Hash) ([]byte, error) {
var code []byte
err := backoff.DoCtx(ctx, maxAttempts, s.strategy, func() error {
c, err := s.source.CodeByHash(ctx, hash)
if err != nil {
s.logger.Warn("Failed to retrieve code", "hash", hash, "err", err)
return err
}
code = c
return nil
})
return code, err
}
func NewRetryingL2Source(logger log.Logger, source L2Source) *RetryingL2Source {
return &RetryingL2Source{
logger: logger,
source: source,
strategy: backoff.Exponential(),
}
}
var _ L2Source = (*RetryingL2Source)(nil)