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
|
// (c) 2019-2020, Ava Labs, Inc. All rights reserved.
// See the file LICENSE for licensing terms.
package evm
import (
"bytes"
"errors"
"fmt"
"sort"
"github.com/ava-labs/coreth/core/state"
"github.com/ava-labs/avalanchego/database"
"github.com/ava-labs/avalanchego/ids"
"github.com/ava-labs/avalanchego/snow"
"github.com/ava-labs/avalanchego/utils"
"github.com/ava-labs/avalanchego/utils/codec"
"github.com/ava-labs/avalanchego/utils/crypto"
"github.com/ava-labs/avalanchego/utils/hashing"
"github.com/ava-labs/avalanchego/vms/components/verify"
"github.com/ava-labs/avalanchego/vms/secp256k1fx"
"github.com/ethereum/go-ethereum/common"
)
var (
errWrongBlockchainID = errors.New("wrong blockchain ID provided")
errWrongNetworkID = errors.New("tx was issued with a different network ID")
errNilTx = errors.New("tx is nil")
)
// EVMOutput defines an output from EVM State created from export transactions
type EVMOutput struct {
Address common.Address `serialize:"true" json:"address"`
Amount uint64 `serialize:"true" json:"amount"`
AssetID ids.ID `serialize:"true" json:"assetID"`
}
// EVMInput defines an input for the EVM State to be used in import transactions
type EVMInput struct {
Address common.Address `serialize:"true" json:"address"`
Amount uint64 `serialize:"true" json:"amount"`
AssetID ids.ID `serialize:"true" json:"assetID"`
Nonce uint64 `serialize:"true" json:"nonce"`
}
// Verify ...
func (out *EVMOutput) Verify() error {
return nil
}
// Verify ...
func (in *EVMInput) Verify() error {
return nil
}
// UnsignedTx is an unsigned transaction
type UnsignedTx interface {
Initialize(unsignedBytes, signedBytes []byte)
ID() ids.ID
UnsignedBytes() []byte
Bytes() []byte
}
// UnsignedAtomicTx is an unsigned operation that can be atomically accepted
type UnsignedAtomicTx interface {
UnsignedTx
// UTXOs this tx consumes
InputUTXOs() ids.Set
// Attempts to verify this transaction with the provided state.
SemanticVerify(vm *VM, stx *Tx) TxError
// Accept this transaction with the additionally provided state transitions.
Accept(ctx *snow.Context, batch database.Batch) error
EVMStateTransfer(vm *VM, state *state.StateDB) error
}
// Tx is a signed transaction
type Tx struct {
// The body of this transaction
UnsignedTx `serialize:"true" json:"unsignedTx"`
// The credentials of this transaction
Creds []verify.Verifiable `serialize:"true" json:"credentials"`
}
// (*secp256k1fx.Credential)
// Sign this transaction with the provided signers
func (tx *Tx) Sign(c codec.Codec, signers [][]*crypto.PrivateKeySECP256K1R) error {
unsignedBytes, err := c.Marshal(&tx.UnsignedTx)
if err != nil {
return fmt.Errorf("couldn't marshal UnsignedTx: %w", err)
}
// Attach credentials
hash := hashing.ComputeHash256(unsignedBytes)
for _, keys := range signers {
cred := &secp256k1fx.Credential{
Sigs: make([][crypto.SECP256K1RSigLen]byte, len(keys)),
}
for i, key := range keys {
sig, err := key.SignHash(hash) // Sign hash
if err != nil {
return fmt.Errorf("problem generating credential: %w", err)
}
copy(cred.Sigs[i][:], sig)
}
tx.Creds = append(tx.Creds, cred) // Attach credential
}
signedBytes, err := c.Marshal(tx)
if err != nil {
return fmt.Errorf("couldn't marshal ProposalTx: %w", err)
}
tx.Initialize(unsignedBytes, signedBytes)
return nil
}
// innerSortInputsAndSigners implements sort.Interface for EVMInput
type innerSortInputsAndSigners struct {
inputs []EVMInput
signers [][]*crypto.PrivateKeySECP256K1R
}
func (ins *innerSortInputsAndSigners) Less(i, j int) bool {
addrComp := bytes.Compare(ins.inputs[i].Address.Bytes(), ins.inputs[j].Address.Bytes())
if addrComp != 0 {
return addrComp < 0
}
return bytes.Compare(ins.inputs[i].AssetID[:], ins.inputs[j].AssetID[:]) < 0
}
func (ins *innerSortInputsAndSigners) Len() int { return len(ins.inputs) }
func (ins *innerSortInputsAndSigners) Swap(i, j int) {
ins.inputs[j], ins.inputs[i] = ins.inputs[i], ins.inputs[j]
ins.signers[j], ins.signers[i] = ins.signers[i], ins.signers[j]
}
// SortEVMInputsAndSigners sorts the list of EVMInputs based on the addresses and assetIDs
func SortEVMInputsAndSigners(inputs []EVMInput, signers [][]*crypto.PrivateKeySECP256K1R) {
sort.Sort(&innerSortInputsAndSigners{inputs: inputs, signers: signers})
}
// IsSortedAndUniqueEVMInputs returns true if the EVM Inputs are sorted and unique
// based on the account addresses
func IsSortedAndUniqueEVMInputs(inputs []EVMInput) bool {
return utils.IsSortedAndUnique(&innerSortInputsAndSigners{inputs: inputs})
}
// innerSortEVMOutputs implements sort.Interface for EVMOutput
type innerSortEVMOutputs struct {
outputs []EVMOutput
}
func (outs *innerSortEVMOutputs) Less(i, j int) bool {
addrComp := bytes.Compare(outs.outputs[i].Address.Bytes(), outs.outputs[j].Address.Bytes())
if addrComp != 0 {
return addrComp < 0
}
return bytes.Compare(outs.outputs[i].AssetID[:], outs.outputs[j].AssetID[:]) < 0
}
func (outs *innerSortEVMOutputs) Len() int { return len(outs.outputs) }
func (outs *innerSortEVMOutputs) Swap(i, j int) {
outs.outputs[j], outs.outputs[i] = outs.outputs[i], outs.outputs[j]
}
// SortEVMOutputs sorts the list of EVMOutputs based on the addresses and assetIDs
// of the outputs
func SortEVMOutputs(outputs []EVMOutput) {
sort.Sort(&innerSortEVMOutputs{outputs: outputs})
}
// IsSortedAndUniqueEVMOutputs returns true if the EVMOutputs are sorted and unique
// based on the account addresses and assetIDs
func IsSortedAndUniqueEVMOutputs(outputs []EVMOutput) bool {
return utils.IsSortedAndUnique(&innerSortEVMOutputs{outputs: outputs})
}
|