-
Notifications
You must be signed in to change notification settings - Fork 2
/
prover.go
238 lines (216 loc) · 7.61 KB
/
prover.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
227
228
229
230
231
232
233
234
235
236
237
238
package relay
import (
"context"
"fmt"
"os"
"time"
"github.com/cosmos/cosmos-sdk/codec"
clienttypes "github.com/cosmos/ibc-go/v7/modules/core/02-client/types"
"github.com/cosmos/ibc-go/v7/modules/core/exported"
lcptypes "github.com/datachainlab/lcp-go/light-clients/lcp/types"
"github.com/datachainlab/lcp-go/relay/elc"
"github.com/datachainlab/lcp-go/relay/enclave"
"github.com/datachainlab/lcp-go/sgx/ias"
"github.com/ethereum/go-ethereum/common"
"github.com/hyperledger-labs/yui-relayer/core"
"google.golang.org/grpc"
"google.golang.org/grpc/credentials/insecure"
)
type Prover struct {
config ProverConfig
originChain core.Chain
originProver core.Prover
homePath string
codec codec.ProtoCodecMarshaler
path *core.PathEnd
lcpServiceClient LCPServiceClient
// state
// registered key info for requesting lcp to generate proof.
activeEnclaveKey *enclave.EnclaveKeyInfo
// if not nil, the key is finalized.
// if nil, the key is not finalized yet.
unfinalizedMsgID core.MsgID
}
var (
_ core.Prover = (*Prover)(nil)
)
func NewProver(config ProverConfig, originChain core.Chain, originProver core.Prover) (*Prover, error) {
return &Prover{config: config, originChain: originChain, originProver: originProver}, nil
}
func (pr *Prover) GetOriginProver() core.Prover {
return pr.originProver
}
func (pr *Prover) initServiceClient() error {
conn, err := grpc.Dial(
pr.config.LcpServiceAddress,
grpc.WithTransportCredentials(insecure.NewCredentials()),
grpc.WithBlock(),
)
if err != nil {
return err
}
pr.lcpServiceClient = NewLCPServiceClient(conn, pr.codec)
return nil
}
// Init initializes the chain
func (pr *Prover) Init(homePath string, timeout time.Duration, codec codec.ProtoCodecMarshaler, debug bool) error {
if debug {
ias.SetAllowDebugEnclaves()
}
if err := pr.originChain.Init(homePath, timeout, codec, debug); err != nil {
return err
}
if err := pr.originProver.Init(homePath, timeout, codec, debug); err != nil {
return err
}
if err := os.MkdirAll(pr.dbPath(), os.ModePerm); err != nil {
return err
}
pr.homePath = homePath
pr.codec = codec
return nil
}
// SetRelayInfo sets source's path and counterparty's info to the chain
func (pr *Prover) SetRelayInfo(path *core.PathEnd, counterparty *core.ProvableChain, counterpartyPath *core.PathEnd) error {
pr.path = path
return nil
}
// SetupForRelay performs chain-specific setup before starting the relay
func (pr *Prover) SetupForRelay(ctx context.Context) error {
return pr.initServiceClient()
}
// GetChainID returns the chain ID
func (pr *Prover) GetChainID() string {
return pr.originChain.ChainID()
}
// CreateInitialLightClientState returns a pair of ClientState and ConsensusState based on the state of the self chain at `height`.
// These states will be submitted to the counterparty chain as MsgCreateClient.
// If `height` is nil, the latest finalized height is selected automatically.
func (pr *Prover) CreateInitialLightClientState(height exported.Height) (exported.ClientState, exported.ConsensusState, error) {
if err := pr.initServiceClient(); err != nil {
return nil, nil, err
}
// NOTE: Query the LCP for available keys, but no need to register it into on-chain here
tmpEKI, err := pr.selectNewEnclaveKey(context.TODO())
if err != nil {
return nil, nil, err
}
originClientState, originConsensusState, err := pr.originProver.CreateInitialLightClientState(height)
if err != nil {
return nil, nil, err
}
anyOriginClientState, err := clienttypes.PackClientState(originClientState)
if err != nil {
return nil, nil, err
}
anyOriginConsensusState, err := clienttypes.PackConsensusState(originConsensusState)
if err != nil {
return nil, nil, err
}
res, err := pr.lcpServiceClient.CreateClient(context.TODO(), &elc.MsgCreateClient{
ClientState: anyOriginClientState,
ConsensusState: anyOriginConsensusState,
Signer: tmpEKI.EnclaveKeyAddress,
})
if err != nil {
return nil, nil, err
}
// TODO relayer should persist res.ClientId
if pr.config.ElcClientId != res.ClientId {
return nil, nil, fmt.Errorf("you must specify '%v' as elc_client_id, but got %v", res.ClientId, pr.config.ElcClientId)
}
clientState := &lcptypes.ClientState{
LatestHeight: clienttypes.Height{},
Mrenclave: pr.config.GetMrenclave(),
KeyExpiration: pr.config.KeyExpiration,
AllowedQuoteStatuses: pr.config.AllowedQuoteStatuses,
AllowedAdvisoryIds: pr.config.AllowedAdvisoryIds,
}
consensusState := &lcptypes.ConsensusState{}
// NOTE after creates client, register an enclave key into the client state
return clientState, consensusState, nil
}
// GetLatestFinalizedHeader returns the latest finalized header on this chain
// The returned header is expected to be the latest one of headers that can be verified by the light client
func (pr *Prover) GetLatestFinalizedHeader() (core.Header, error) {
return pr.originProver.GetLatestFinalizedHeader()
}
// SetupHeadersForUpdate returns the finalized header and any intermediate headers needed to apply it to the client on the counterpaty chain
// The order of the returned header slice should be as: [<intermediate headers>..., <update header>]
// if the header slice's length == nil and err == nil, the relayer should skips the update-client
func (pr *Prover) SetupHeadersForUpdate(dstChain core.FinalityAwareChain, latestFinalizedHeader core.Header) ([]core.Header, error) {
if err := pr.UpdateEKIfNeeded(context.TODO(), dstChain); err != nil {
return nil, err
}
headers, err := pr.originProver.SetupHeadersForUpdate(dstChain, latestFinalizedHeader)
if err != nil {
return nil, err
}
if len(headers) == 0 {
return nil, nil
}
var updates []core.Header
for _, h := range headers {
anyHeader, err := clienttypes.PackClientMessage(h)
if err != nil {
return nil, err
}
res, err := pr.lcpServiceClient.UpdateClient(context.TODO(), &elc.MsgUpdateClient{
ClientId: pr.config.ElcClientId,
Header: anyHeader,
IncludeState: false,
Signer: pr.activeEnclaveKey.EnclaveKeyAddress,
})
if err != nil {
return nil, err
}
// ensure the commitment is valid
if _, err := lcptypes.EthABIDecodeHeaderedCommitment(res.Commitment); err != nil {
return nil, err
}
updates = append(updates, &lcptypes.UpdateClientMessage{
Commitment: res.Commitment,
Signer: res.Signer,
Signature: res.Signature,
})
}
return updates, nil
}
func (pr *Prover) CheckRefreshRequired(counterparty core.ChainInfoICS02Querier) (bool, error) {
return pr.originProver.CheckRefreshRequired(counterparty)
}
func (pr *Prover) ProveState(ctx core.QueryContext, path string, value []byte) ([]byte, clienttypes.Height, error) {
proof, proofHeight, err := pr.originProver.ProveState(ctx, path, value)
if err != nil {
return nil, clienttypes.Height{}, err
}
res, err := pr.lcpServiceClient.VerifyMembership(ctx.Context(), &elc.MsgVerifyMembership{
ClientId: pr.config.ElcClientId,
Prefix: []byte(exported.StoreKey),
Path: path,
Value: value,
ProofHeight: proofHeight,
Proof: proof,
Signer: pr.activeEnclaveKey.EnclaveKeyAddress,
})
if err != nil {
return nil, clienttypes.Height{}, err
}
commitment, err := lcptypes.EthABIDecodeHeaderedCommitment(res.Commitment)
if err != nil {
return nil, clienttypes.Height{}, err
}
sc, err := commitment.GetStateCommitment()
if err != nil {
return nil, clienttypes.Height{}, err
}
cp, err := lcptypes.EthABIEncodeCommitmentProof(&lcptypes.CommitmentProof{
CommitmentBytes: res.Commitment,
Signer: common.BytesToAddress(res.Signer),
Signature: res.Signature,
})
if err != nil {
return nil, clienttypes.Height{}, err
}
return cp, sc.Height, nil
}