This repository has been archived by the owner on May 13, 2022. It is now read-only.
-
Notifications
You must be signed in to change notification settings - Fork 346
/
shared.go
226 lines (201 loc) · 7.03 KB
/
shared.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
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
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
package contexts
import (
"fmt"
"github.com/hyperledger/burrow/acm"
"github.com/hyperledger/burrow/acm/acmstate"
"github.com/hyperledger/burrow/crypto"
"github.com/hyperledger/burrow/execution/errors"
"github.com/hyperledger/burrow/execution/exec"
"github.com/hyperledger/burrow/logging"
"github.com/hyperledger/burrow/logging/structure"
"github.com/hyperledger/burrow/permission"
"github.com/hyperledger/burrow/txs/payload"
)
type Context interface {
Execute(txe *exec.TxExecution, p payload.Payload) error
}
// The accounts from the TxInputs must either already have
// acm.PublicKey().(type) != nil, (it must be known),
// or it must be specified in the TxInput. If redeclared,
// the TxInput is modified and input.PublicKey() set to nil.
func getInputs(accountGetter acmstate.AccountGetter, ins []*payload.TxInput) (map[crypto.Address]*acm.Account, uint64, error) {
var total uint64
accounts := map[crypto.Address]*acm.Account{}
for _, in := range ins {
// Account shouldn't be duplicated
if _, ok := accounts[in.Address]; ok {
return nil, total, errors.ErrorCodeDuplicateAddress
}
acc, err := accountGetter.GetAccount(in.Address)
if err != nil {
return nil, total, err
}
if acc == nil {
return nil, total, errors.ErrorCodeInvalidAddress
}
accounts[in.Address] = acc
total += in.Amount
}
return accounts, total, nil
}
func getOrMakeOutputs(accountGetter acmstate.AccountGetter, accs map[crypto.Address]*acm.Account,
outs []*payload.TxOutput, logger *logging.Logger) (map[crypto.Address]*acm.Account, error) {
if accs == nil {
accs = make(map[crypto.Address]*acm.Account)
}
// we should err if an account is being created but the inputs don't have permission
var err error
for _, out := range outs {
accs[out.Address], err = getOrMakeOutput(accountGetter, accs, out.Address, logger)
if err != nil {
return nil, err
}
}
return accs, nil
}
func getOrMakeOutput(accountGetter acmstate.AccountGetter, accs map[crypto.Address]*acm.Account,
outputAddress crypto.Address, logger *logging.Logger) (*acm.Account, error) {
// Account shouldn't be duplicated
if _, ok := accs[outputAddress]; ok {
return nil, errors.ErrorCodeDuplicateAddress
}
acc, err := accountGetter.GetAccount(outputAddress)
if err != nil {
return nil, err
}
// output account may be nil (new)
if acc == nil {
if !hasCreateAccountPermission(accountGetter, accs, logger) {
return nil, fmt.Errorf("at least one input does not have permission to create accounts")
}
logger.InfoMsg("Account not found so attempting to create it", "address", outputAddress)
acc = &acm.Account{
Address: outputAddress,
Sequence: 0,
Balance: 0,
Permissions: permission.ZeroAccountPermissions,
}
}
return acc, nil
}
func validateOutputs(outs []*payload.TxOutput) (uint64, error) {
total := uint64(0)
for _, out := range outs {
// Good. Add amount to total
total += out.Amount
}
return total, nil
}
func adjustByInputs(accs map[crypto.Address]*acm.Account, ins []*payload.TxInput, logger *logging.Logger) error {
for _, in := range ins {
acc := accs[in.Address]
if acc == nil {
return fmt.Errorf("adjustByInputs() expects account in accounts, but account %s not found", in.Address)
}
if acc.Balance < in.Amount {
return fmt.Errorf("adjustByInputs() expects sufficient funds but account %s only has balance %v and "+
"we are deducting %v", in.Address, acc.Balance, in.Amount)
}
acc.Balance -= in.Amount
}
return nil
}
func adjustByOutputs(accs map[crypto.Address]*acm.Account, outs []*payload.TxOutput) error {
for _, out := range outs {
acc := accs[out.Address]
if acc == nil {
return fmt.Errorf("adjustByOutputs() expects account in accounts, but account %s not found",
out.Address)
}
acc.Balance += out.Amount
}
return nil
}
//---------------------------------------------------------------
// Get permission on an account or fall back to global value
func HasPermission(accountGetter acmstate.AccountGetter, acc *acm.Account, perm permission.PermFlag, logger *logging.Logger) bool {
if perm > permission.AllPermFlags {
logger.InfoMsg(
fmt.Sprintf("HasPermission called on invalid permission 0b%b (invalid) > 0b%b (maximum) ",
perm, permission.AllPermFlags),
"invalid_permission", perm,
"maximum_permission", permission.AllPermFlags)
return false
}
v, err := acc.Permissions.Base.Compose(acmstate.GlobalAccountPermissions(accountGetter).Base).Get(perm)
if err != nil {
logger.TraceMsg("Error obtaining permission value (will default to false/deny)",
"perm_flag", perm.String(),
structure.ErrorKey, err)
}
if v {
logger.TraceMsg("Account has permission",
"account_address", acc.GetAddress,
"perm_flag", perm.String())
} else {
logger.TraceMsg("Account does not have permission",
"account_address", acc.GetAddress,
"perm_flag", perm.String())
}
return v
}
func allHavePermission(accountGetter acmstate.AccountGetter, perm permission.PermFlag,
accs map[crypto.Address]*acm.Account, logger *logging.Logger) error {
for _, acc := range accs {
if !HasPermission(accountGetter, acc, perm, logger) {
return errors.PermissionDenied{
Address: acc.Address,
Perm: perm,
}
}
}
return nil
}
func hasProposalPermission(accountGetter acmstate.AccountGetter, acc *acm.Account,
logger *logging.Logger) bool {
return HasPermission(accountGetter, acc, permission.Proposal, logger)
}
func hasInputPermission(accountGetter acmstate.AccountGetter, acc *acm.Account,
logger *logging.Logger) bool {
return HasPermission(accountGetter, acc, permission.Input, logger)
}
func hasBatchPermission(accountGetter acmstate.AccountGetter, acc *acm.Account,
logger *logging.Logger) bool {
return HasPermission(accountGetter, acc, permission.Batch, logger)
}
func hasNamePermission(accountGetter acmstate.AccountGetter, acc *acm.Account,
logger *logging.Logger) bool {
return HasPermission(accountGetter, acc, permission.Name, logger)
}
func hasCallPermission(accountGetter acmstate.AccountGetter, acc *acm.Account,
logger *logging.Logger) bool {
return HasPermission(accountGetter, acc, permission.Call, logger)
}
func hasCreateContractPermission(accountGetter acmstate.AccountGetter, acc *acm.Account,
logger *logging.Logger) bool {
return HasPermission(accountGetter, acc, permission.CreateContract, logger)
}
func hasCreateAccountPermission(accountGetter acmstate.AccountGetter, accs map[crypto.Address]*acm.Account,
logger *logging.Logger) bool {
for _, acc := range accs {
if !HasPermission(accountGetter, acc, permission.CreateAccount, logger) {
return false
}
}
return true
}
func hasBondPermission(accountGetter acmstate.AccountGetter, acc *acm.Account,
logger *logging.Logger) bool {
return HasPermission(accountGetter, acc, permission.Bond, logger)
}
func hasBondOrSendPermission(accountGetter acmstate.AccountGetter, accs map[crypto.Address]*acm.Account,
logger *logging.Logger) bool {
for _, acc := range accs {
if !HasPermission(accountGetter, acc, permission.Bond, logger) {
if !HasPermission(accountGetter, acc, permission.Send, logger) {
return false
}
}
}
return true
}