forked from ethereum/go-ethereum
-
Notifications
You must be signed in to change notification settings - Fork 0
/
state_processor.go
141 lines (130 loc) · 5.63 KB
/
state_processor.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
// Copyright 2015 The go-ethereum Authors
// This file is part of the go-ethereum library.
//
// The go-ethereum library is free software: you can redistribute it and/or modify
// it under the terms of the GNU Lesser General Public License as published by
// the Free Software Foundation, either version 3 of the License, or
// (at your option) any later version.
//
// The go-ethereum library is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
// GNU Lesser General Public License for more details.
//
// You should have received a copy of the GNU Lesser General Public License
// along with the go-ethereum library. If not, see <http://www.gnu.org/licenses/>.
package core
import (
"github.com/ethereum/go-ethereum/common"
"github.com/ethereum/go-ethereum/consensus"
"github.com/ethereum/go-ethereum/consensus/misc"
"github.com/ethereum/go-ethereum/core/state"
"github.com/ethereum/go-ethereum/core/types"
"github.com/ethereum/go-ethereum/core/vm"
"github.com/ethereum/go-ethereum/crypto"
"github.com/ethereum/go-ethereum/params"
)
// StateProcessor is a basic Processor, which takes care of transitioning
// state from one point to another.
//
// StateProcessor implements Processor.
type StateProcessor struct {
config *params.ChainConfig // Chain configuration options
bc *BlockChain // Canonical block chain
engine consensus.Engine // Consensus engine used for block rewards
}
// NewStateProcessor initialises a new StateProcessor.
func NewStateProcessor(config *params.ChainConfig, bc *BlockChain, engine consensus.Engine) *StateProcessor {
return &StateProcessor{
config: config,
bc: bc,
engine: engine,
}
}
// Process processes the state changes according to the Ethereum rules by running
// the transaction messages using the statedb and applying any rewards to both
// the processor (coinbase) and any included uncles.
//
// Process returns the receipts and logs accumulated during the process and
// returns the amount of gas that was used in the process. If any of the
// transactions failed to execute due to insufficient gas it will return an error.
func (p *StateProcessor) Process(block *types.Block, statedb *state.StateDB, cfg vm.Config) (types.Receipts, []*types.Log, uint64, error) {
var (
receipts types.Receipts
usedGas = new(uint64)
header = block.Header()
allLogs []*types.Log
gp = new(GasPool).AddGas(block.GasLimit())
)
// Mutate the block and state according to any hard-fork specs
if p.config.DAOForkSupport && p.config.DAOForkBlock != nil && p.config.DAOForkBlock.Cmp(block.Number()) == 0 {
misc.ApplyDAOHardFork(statedb)
}
// Iterate over and process the individual transactions
for i, tx := range block.Transactions() {
statedb.Prepare(tx.Hash(), block.Hash(), i)
receipt, err := ApplyTransaction(p.config, p.bc, nil, gp, statedb, header, tx, usedGas, cfg)
if err != nil {
return nil, nil, 0, err
}
receipts = append(receipts, receipt)
allLogs = append(allLogs, receipt.Logs...)
}
// Finalize the block, applying any consensus engine specific extras (e.g. block rewards)
p.engine.Finalize(p.bc, header, statedb, block.Transactions(), block.Uncles())
return receipts, allLogs, *usedGas, nil
}
// ApplyTransaction attempts to apply a transaction to the given state database
// and uses the input parameters for its environment. It returns the receipt
// for the transaction, gas used and an error if the transaction failed,
// indicating the block was invalid.
func ApplyTransaction(config *params.ChainConfig, bc ChainContext, author *common.Address, gp *GasPool, statedb *state.StateDB, header *types.Header, tx *types.Transaction, usedGas *uint64, cfg vm.Config) (*types.Receipt, error) {
msg, err := tx.AsMessage(types.MakeSigner(config, header.Number))
if err != nil {
return nil, err
}
// Create a new context to be used in the EVM environment
context := NewEVMContext(msg, header, bc, author)
// Create a new environment which holds all relevant information
// about the transaction and calling mechanisms.
vmenv := vm.NewEVM(context, statedb, config, cfg)
if config.IsYoloV2(header.Number) {
statedb.AddAddressToAccessList(msg.From())
if dst := msg.To(); dst != nil {
statedb.AddAddressToAccessList(*dst)
// If it's a create-tx, the destination will be added inside evm.create
}
for _, addr := range vmenv.ActivePrecompiles() {
statedb.AddAddressToAccessList(addr)
}
}
// Apply the transaction to the current state (included in the env)
result, err := ApplyMessage(vmenv, msg, gp)
if err != nil {
return nil, err
}
// Update the state with pending changes
var root []byte
if config.IsByzantium(header.Number) {
statedb.Finalise(true)
} else {
root = statedb.IntermediateRoot(config.IsEIP158(header.Number)).Bytes()
}
*usedGas += result.UsedGas
// Create a new receipt for the transaction, storing the intermediate root and gas used by the tx
// based on the eip phase, we're passing whether the root touch-delete accounts.
receipt := types.NewReceipt(root, result.Failed(), *usedGas)
receipt.TxHash = tx.Hash()
receipt.GasUsed = result.UsedGas
// if the transaction created a contract, store the creation address in the receipt.
if msg.To() == nil {
receipt.ContractAddress = crypto.CreateAddress(vmenv.Context.Origin, tx.Nonce())
}
// Set the receipt logs and create a bloom for filtering
receipt.Logs = statedb.GetLogs(tx.Hash())
receipt.Bloom = types.CreateBloom(types.Receipts{receipt})
receipt.BlockHash = statedb.BlockHash()
receipt.BlockNumber = header.Number
receipt.TransactionIndex = uint(statedb.TxIndex())
return receipt, err
}