-
Notifications
You must be signed in to change notification settings - Fork 201
/
blockSizeComputation.go
178 lines (141 loc) · 5.5 KB
/
blockSizeComputation.go
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
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
package preprocess
import (
"crypto/rand"
"sync/atomic"
"github.com/ElrondNetwork/elrond-go/core"
"github.com/ElrondNetwork/elrond-go/core/check"
"github.com/ElrondNetwork/elrond-go/data/batch"
"github.com/ElrondNetwork/elrond-go/data/block"
"github.com/ElrondNetwork/elrond-go/marshal"
"github.com/ElrondNetwork/elrond-go/process"
)
// blockSizeComputation is able to estimate the size in bytes of a block body given the number of contained
// transactions hashes and the number of miniblocks. It uses the marshalizer to compute the size as precise as possible.
type blockSizeComputation struct {
miniblockSize uint32
txSize uint32
numMiniBlocks uint32
numTxs uint32
blockSizeThrottler BlockSizeThrottler
maxSize uint32
}
// NewBlockSizeComputation creates a blockSizeComputation instance
func NewBlockSizeComputation(
marshalizer marshal.Marshalizer,
blockSizeThrottler BlockSizeThrottler,
maxSize uint32,
) (*blockSizeComputation, error) {
if check.IfNil(marshalizer) {
return nil, process.ErrNilMarshalizer
}
if check.IfNil(blockSizeThrottler) {
return nil, process.ErrNilBlockSizeThrottler
}
bsc := &blockSizeComputation{
blockSizeThrottler: blockSizeThrottler,
maxSize: maxSize,
}
err := bsc.precomputeValues(marshalizer)
if err != nil {
return nil, err
}
return bsc, nil
}
func (bsc *blockSizeComputation) precomputeValues(marshalizer marshal.Marshalizer) error {
oneEmptyMiniblockSize, err := bsc.generateDummyBlockbodySize(marshalizer, 1, 0)
if err != nil {
return err
}
oneMiniblockSizeWithTenTxs, err := bsc.generateDummyBlockbodySize(marshalizer, 1, 10)
if err != nil {
return err
}
oneMiniblockSizeWithTwentyTxs, err := bsc.generateDummyBlockbodySize(marshalizer, 1, 20)
if err != nil {
return err
}
tenMiniblocksWithTenTxs, err := bsc.generateDummyBlockbodySize(marshalizer, 10, 10)
if err != nil {
return err
}
bsc.txSize = (oneMiniblockSizeWithTwentyTxs - oneMiniblockSizeWithTenTxs) / 10
bsc.miniblockSize = core.MaxUint32(oneEmptyMiniblockSize, oneMiniblockSizeWithTenTxs-10*bsc.txSize)
bsc.miniblockSize = core.MaxUint32(bsc.miniblockSize, (tenMiniblocksWithTenTxs-100*bsc.txSize)/10)
return nil
}
func (bsc *blockSizeComputation) generateDummyBlockbodySize(marshalizer marshal.Marshalizer, numMiniblocks int, numTxHashesPerMiniblock int) (uint32, error) {
b := &batch.Batch{}
for i := 0; i < numMiniblocks; i++ {
miniBlock := bsc.generateDummyMiniblock(numTxHashesPerMiniblock)
buff, err := marshalizer.Marshal(miniBlock)
if err != nil {
return 0, err
}
b.Data = append(b.Data, buff)
}
buff, err := marshalizer.Marshal(b)
if err != nil {
return 0, err
}
return uint32(len(buff)), nil
}
func (bsc *blockSizeComputation) generateDummyMiniblock(numTxHashes int) *block.MiniBlock {
mb := &block.MiniBlock{
TxHashes: nil,
ReceiverShardID: 999,
SenderShardID: 999,
Type: 255,
}
mb.Type = block.TxBlock
mb.TxHashes = make([][]byte, numTxHashes)
for i := 0; i < numTxHashes; i++ {
mb.TxHashes[i] = make([]byte, 32)
_, _ = rand.Reader.Read(mb.TxHashes[i])
}
return mb
}
// Init reset the stored values of accumulated numTxs and numMiniBlocks
func (bsc *blockSizeComputation) Init() {
atomic.StoreUint32(&bsc.numTxs, 0)
atomic.StoreUint32(&bsc.numMiniBlocks, 0)
}
// AddNumMiniBlocks adds the provided value to numMiniBlocks in a concurrent safe manner
func (bsc *blockSizeComputation) AddNumMiniBlocks(numMiniBlocks int) {
atomic.AddUint32(&bsc.numMiniBlocks, uint32(numMiniBlocks))
}
// AddNumTxs adds the provided value to numTxs in a concurrent safe manner
func (bsc *blockSizeComputation) AddNumTxs(numTxs int) {
atomic.AddUint32(&bsc.numTxs, uint32(numTxs))
}
// IsMaxBlockSizeReached returns true if the provided number of new miniblocks and txs go over
// the maximum allowed throttled block size
func (bsc *blockSizeComputation) IsMaxBlockSizeReached(numNewMiniBlocks int, numNewTxs int) bool {
totalMiniBlocks := atomic.LoadUint32(&bsc.numMiniBlocks) + uint32(numNewMiniBlocks)
totalTxs := atomic.LoadUint32(&bsc.numTxs) + uint32(numNewTxs)
return bsc.isMaxBlockSizeReached(totalMiniBlocks, totalTxs)
}
func (bsc *blockSizeComputation) isMaxBlockSizeReached(totalMiniBlocks uint32, totalTxs uint32) bool {
miniblocksSize := bsc.miniblockSize * totalMiniBlocks
txsSize := bsc.txSize * totalTxs
return miniblocksSize+txsSize > bsc.blockSizeThrottler.GetCurrentMaxSize()
}
// IsMaxBlockSizeWithoutThrottleReached returns true if the provided number of new miniblocks and txs go over
// the maximum allowed not throttled block size
func (bsc *blockSizeComputation) IsMaxBlockSizeWithoutThrottleReached(numNewMiniBlocks int, numNewTxs int) bool {
totalMiniBlocks := atomic.LoadUint32(&bsc.numMiniBlocks) + uint32(numNewMiniBlocks)
totalTxs := atomic.LoadUint32(&bsc.numTxs) + uint32(numNewTxs)
return bsc.isMaxBlockSizeWithoutThrottleReached(totalMiniBlocks, totalTxs)
}
func (bsc *blockSizeComputation) isMaxBlockSizeWithoutThrottleReached(totalMiniBlocks uint32, totalTxs uint32) bool {
miniblocksSize := bsc.miniblockSize * totalMiniBlocks
txsSize := bsc.txSize * totalTxs
return miniblocksSize+txsSize > bsc.maxSize
}
// MaxTransactionsInOneMiniblock returns the maximum transactions in a single miniblock
func (bsc *blockSizeComputation) MaxTransactionsInOneMiniblock() int {
return int((bsc.maxSize - bsc.miniblockSize) / bsc.txSize)
}
// IsInterfaceNil returns true if there is no value under the interface
func (bsc *blockSizeComputation) IsInterfaceNil() bool {
return bsc == nil
}