aboutsummaryrefslogtreecommitdiffstats
path: root/core/vm/runtime/env.go
blob: ce64d711765ec11bde599c0ee94c6ca24c671065 (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
// Copyright 2014 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 runtime

import (
    "math/big"

    "github.com/ethereum/go-ethereum/common"
    "github.com/ethereum/go-ethereum/core"
    "github.com/ethereum/go-ethereum/core/state"
    "github.com/ethereum/go-ethereum/core/vm"
)

// Env is a basic runtime environment required for running the EVM.
type Env struct {
    depth int
    state *state.StateDB

    origin   common.Address
    coinbase common.Address

    number     *big.Int
    time       *big.Int
    difficulty *big.Int
    gasLimit   *big.Int

    logs []vm.StructLog

    getHashFn func(uint64) common.Hash

    evm *vm.EVM
}

// NewEnv returns a new vm.Environment
func NewEnv(cfg *Config, state *state.StateDB) vm.Environment {
    env := &Env{
        state:      state,
        origin:     cfg.Origin,
        coinbase:   cfg.Coinbase,
        number:     cfg.BlockNumber,
        time:       cfg.Time,
        difficulty: cfg.Difficulty,
        gasLimit:   cfg.GasLimit,
    }
    env.evm = vm.New(env, &vm.Config{
        Debug:     cfg.Debug,
        EnableJit: !cfg.DisableJit,
        ForceJit:  !cfg.DisableJit,

        Logger: vm.LogConfig{
            Collector: env,
        },
    })

    return env
}

func (self *Env) StructLogs() []vm.StructLog {
    return self.logs
}

func (self *Env) AddStructLog(log vm.StructLog) {
    self.logs = append(self.logs, log)
}

func (self *Env) Vm() vm.Vm                { return self.evm }
func (self *Env) Origin() common.Address   { return self.origin }
func (self *Env) BlockNumber() *big.Int    { return self.number }
func (self *Env) Coinbase() common.Address { return self.coinbase }
func (self *Env) Time() *big.Int           { return self.time }
func (self *Env) Difficulty() *big.Int     { return self.difficulty }
func (self *Env) Db() vm.Database          { return self.state }
func (self *Env) GasLimit() *big.Int       { return self.gasLimit }
func (self *Env) VmType() vm.Type          { return vm.StdVmTy }
func (self *Env) GetHash(n uint64) common.Hash {
    return self.getHashFn(n)
}
func (self *Env) AddLog(log *vm.Log) {
    self.state.AddLog(log)
}
func (self *Env) Depth() int     { return self.depth }
func (self *Env) SetDepth(i int) { self.depth = i }
func (self *Env) CanTransfer(from common.Address, balance *big.Int) bool {
    return self.state.GetBalance(from).Cmp(balance) >= 0
}
func (self *Env) MakeSnapshot() vm.Database {
    return self.state.Copy()
}
func (self *Env) SetSnapshot(copy vm.Database) {
    self.state.Set(copy.(*state.StateDB))
}

func (self *Env) Transfer(from, to vm.Account, amount *big.Int) {
    core.Transfer(from, to, amount)
}

func (self *Env) Call(caller vm.ContractRef, addr common.Address, data []byte, gas, price, value *big.Int) ([]byte, error) {
    return core.Call(self, caller, addr, data, gas, price, value)
}
func (self *Env) CallCode(caller vm.ContractRef, addr common.Address, data []byte, gas, price, value *big.Int) ([]byte, error) {
    return core.CallCode(self, caller, addr, data, gas, price, value)
}

func (self *Env) DelegateCall(me vm.ContractRef, addr common.Address, data []byte, gas, price *big.Int) ([]byte, error) {
    return core.DelegateCall(self, me, addr, data, gas, price)
}

func (self *Env) Create(caller vm.ContractRef, data []byte, gas, price, value *big.Int) ([]byte, common.Address, error) {
    return core.Create(self, caller, data, gas, price, value)
}