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
|
package eth
import (
"math"
"math/big"
"sync"
"github.com/ethereum/eth-go/ethchain"
"github.com/ethereum/eth-go/ethutil"
)
type block struct {
peer *Peer
block *ethchain.Block
}
type BlockPool struct {
mut sync.Mutex
eth *Ethereum
hashPool [][]byte
pool map[string]*block
td *big.Int
}
func NewBlockPool(eth *Ethereum) *BlockPool {
return &BlockPool{
eth: eth,
pool: make(map[string]*block),
td: ethutil.Big0,
}
}
func (self *BlockPool) Len() int {
return len(self.hashPool)
}
func (self *BlockPool) HasLatestHash() bool {
return self.pool[string(self.eth.BlockChain().CurrentBlock.Hash())] != nil
}
func (self *BlockPool) HasCommonHash(hash []byte) bool {
return self.eth.BlockChain().GetBlock(hash) != nil
}
func (self *BlockPool) AddHash(hash []byte) {
if self.pool[string(hash)] == nil {
self.pool[string(hash)] = &block{nil, nil}
self.hashPool = append([][]byte{hash}, self.hashPool...)
}
}
func (self *BlockPool) SetBlock(b *ethchain.Block, peer *Peer) {
hash := string(b.Hash())
if self.pool[hash] == nil && !self.eth.BlockChain().HasBlock(b.Hash()) {
self.hashPool = append(self.hashPool, b.Hash())
self.pool[hash] = &block{peer, b}
} else if self.pool[hash] != nil {
self.pool[hash].block = b
}
}
func (self *BlockPool) CheckLinkAndProcess(f func(block *ethchain.Block)) {
var blocks ethchain.Blocks
for _, item := range self.pool {
if item.block != nil {
blocks = append(blocks, item.block)
}
}
ethchain.BlockBy(ethchain.Number).Sort(blocks)
for _, block := range blocks {
if self.eth.BlockChain().HasBlock(block.PrevHash) {
f(block)
hash := block.Hash()
self.hashPool = ethutil.DeleteFromByteSlice(self.hashPool, hash)
delete(self.pool, string(hash))
}
}
}
func (self *BlockPool) Take(amount int, peer *Peer) (hashes [][]byte) {
self.mut.Lock()
defer self.mut.Unlock()
num := int(math.Min(float64(amount), float64(len(self.pool))))
j := 0
for i := 0; i < len(self.hashPool) && j < num; i++ {
hash := string(self.hashPool[i])
if self.pool[hash] != nil && (self.pool[hash].peer == nil || self.pool[hash].peer == peer) && self.pool[hash].block == nil {
self.pool[hash].peer = peer
hashes = append(hashes, self.hashPool[i])
j++
}
}
return
}
|
