aboutsummaryrefslogtreecommitdiffstats
path: root/miner/worker.go
blob: d0d085861f5f092148bb4d43ce2b3f5de06f33c3 (plain) (blame)
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
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
package miner

import (
    "fmt"
    "math/big"
    "sort"

    "github.com/ethereum/go-ethereum/core"
    "github.com/ethereum/go-ethereum/core/types"
    "github.com/ethereum/go-ethereum/eth"
    "github.com/ethereum/go-ethereum/ethutil"
    "github.com/ethereum/go-ethereum/event"
    "github.com/ethereum/go-ethereum/pow"
    "github.com/ethereum/go-ethereum/state"
    "gopkg.in/fatih/set.v0"
)

type environment struct {
    totalUsedGas *big.Int
    state        *state.StateDB
    coinbase     *state.StateObject
    block        *types.Block
    ancestors    *set.Set
    uncles       *set.Set
}

func env(block *types.Block, eth *eth.Ethereum) *environment {
    state := state.New(block.Root(), eth.Db())
    env := &environment{
        totalUsedGas: new(big.Int),
        state:        state,
        block:        block,
        ancestors:    set.New(),
        uncles:       set.New(),
        coinbase:     state.GetOrNewStateObject(block.Coinbase()),
    }
    for _, ancestor := range eth.ChainManager().GetAncestors(block, 7) {
        env.ancestors.Add(string(ancestor.Hash()))
    }

    return env
}

type Agent interface {
    Work() chan<- *types.Block
    SetNonceCh(chan<- []byte)
    Stop()
    Pow() pow.PoW
}

type worker struct {
    agents []Agent
    recv   chan []byte
    mux    *event.TypeMux
    quit   chan struct{}
    pow    pow.PoW

    eth      *eth.Ethereum
    chain    *core.ChainManager
    proc     *core.BlockProcessor
    coinbase []byte

    current *environment
}

func newWorker(coinbase []byte, eth *eth.Ethereum) *worker {
    return &worker{
        eth:      eth,
        mux:      eth.EventMux(),
        recv:     make(chan []byte),
        chain:    eth.ChainManager(),
        proc:     eth.BlockProcessor(),
        coinbase: coinbase,
    }
}

func (self *worker) start() {
    go self.update()
    go self.wait()
}

func (self *worker) stop() {
    close(self.quit)
}

func (self *worker) register(agent Agent) {
    self.agents = append(self.agents, agent)
    agent.SetNonceCh(self.recv)
}

func (self *worker) update() {
    events := self.mux.Subscribe(core.ChainEvent{}, core.TxPreEvent{})

out:
    for {
        select {
        case event := <-events.Chan():
            switch event := event.(type) {
            case core.ChainEvent:
                self.commitNewWork()
            case core.TxPreEvent:
                if err := self.commitTransaction(event.Tx); err != nil {
                    self.push()
                }
            }
        case <-self.quit:
            break out
        }
    }
}

func (self *worker) wait() {
    for {
        for nonce := range self.recv {
            self.current.block.Header().Nonce = nonce
            fmt.Println(self.current.block)

            self.chain.InsertChain(types.Blocks{self.current.block})
            break
        }
    }
}

func (self *worker) push() {
    self.current.state.Update(ethutil.Big0)
    self.current.block.SetRoot(self.current.state.Root())

    for _, agent := range self.agents {
        agent.Work() <- self.current.block
    }
}

func (self *worker) commitNewWork() {
    self.current = env(self.chain.NewBlock(self.coinbase), self.eth)
    parent := self.chain.GetBlock(self.current.block.ParentHash())
    self.current.coinbase.SetGasPool(core.CalcGasLimit(parent, self.current.block))

    transactions := self.eth.TxPool().GetTransactions()
    sort.Sort(types.TxByNonce{transactions})

    // Keep track of transactions which return errors so they can be removed
    var remove types.Transactions
    for _, tx := range transactions {
        err := self.commitTransaction(tx)
        switch {
        case core.IsNonceErr(err):
            remove = append(remove, tx)
        case core.IsGasLimitErr(err):
            // Break on gas limit
            break
        default:
            minerlogger.Infoln(err)
            remove = append(remove, tx)
        }
    }
    self.eth.TxPool().RemoveSet(remove)

    self.current.coinbase.AddAmount(core.BlockReward)

    self.push()
}

var (
    inclusionReward = new(big.Int).Div(core.BlockReward, big.NewInt(32))
    _uncleReward    = new(big.Int).Mul(core.BlockReward, big.NewInt(15))
    uncleReward     = new(big.Int).Div(_uncleReward, big.NewInt(16))
)

func (self *worker) commitUncle(uncle *types.Header) error {
    if self.current.uncles.Has(string(uncle.Hash())) {
        // Error not unique
        return core.UncleError("Uncle not unique")
    }
    self.current.uncles.Add(string(uncle.Hash()))

    if !self.current.ancestors.Has(string(uncle.ParentHash)) {
        return core.UncleError(fmt.Sprintf("Uncle's parent unknown (%x)", uncle.ParentHash[0:4]))
    }

    if !self.pow.Verify(types.NewBlockWithHeader(uncle)) {
        return core.ValidationError("Uncle's nonce is invalid (= %v)", ethutil.Bytes2Hex(uncle.Nonce))
    }

    uncleAccount := self.current.state.GetAccount(uncle.Coinbase)
    uncleAccount.AddAmount(uncleReward)

    self.current.coinbase.AddBalance(uncleReward)

    return nil
}

func (self *worker) commitTransaction(tx *types.Transaction) error {
    snapshot := self.current.state.Copy()
    receipt, txGas, err := self.proc.ApplyTransaction(self.current.coinbase, self.current.state, self.current.block, tx, self.current.totalUsedGas, true)
    if err != nil {
        self.current.state.Set(snapshot)

        return err
    }

    self.current.totalUsedGas.Add(self.current.totalUsedGas, txGas)
    self.current.block.AddTransaction(tx)
    self.current.block.AddReceipt(receipt)

    return nil
}