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lcp.go
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lcp.go
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package relay
import (
"context"
"log"
"time"
sdk "github.com/cosmos/cosmos-sdk/types"
clienttypes "github.com/cosmos/ibc-go/v7/modules/core/02-client/types"
ibcexported "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/hyperledger-labs/yui-relayer/core"
)
func (pr *Prover) syncUpstreamHeader(includeState bool) ([]*elc.MsgUpdateClientResponse, error) {
// 1. check if the latest height of the client is less than the given height
res, err := pr.lcpServiceClient.Client(context.TODO(), &elc.QueryClientRequest{ClientId: pr.config.ElcClientId})
if err != nil {
return nil, err
}
latestHeader, err := pr.originProver.GetLatestFinalizedHeader()
if err != nil {
return nil, err
}
var clientState ibcexported.ClientState
if err := pr.codec.UnpackAny(res.ClientState, &clientState); err != nil {
return nil, err
}
if clientState.GetLatestHeight().GTE(latestHeader.GetHeight()) {
return nil, nil
}
log.Printf("syncUpstreamHeader try to update the client in ELC: latest=%v got=%v", clientState.GetLatestHeight(), latestHeader.GetHeight())
// 2. query the header from the upstream chain
headers, err := pr.originProver.SetupHeadersForUpdate(NewLCPQuerier(pr.lcpServiceClient, pr.config.ElcClientId), latestHeader)
if err != nil {
return nil, err
}
if len(headers) == 0 {
return nil, nil
}
// 3. send a request that contains a header from 2 to update the client in ELC
var responses []*elc.MsgUpdateClientResponse
for _, header := range headers {
anyHeader, err := clienttypes.PackClientMessage(header)
if err != nil {
return nil, err
}
res, err := pr.lcpServiceClient.UpdateClient(context.TODO(), &elc.MsgUpdateClient{
ClientId: pr.config.ElcClientId,
Header: anyHeader,
IncludeState: includeState,
})
if err != nil {
return nil, err
}
responses = append(responses, res)
}
return responses, nil
}
func registerEnclaveKey(pathEnd *core.PathEnd, prover *Prover, debug bool) error {
if debug {
ias.SetAllowDebugEnclaves()
defer ias.UnsetAllowDebugEnclaves()
}
res, err := prover.lcpServiceClient.AttestedVerificationReport(context.TODO(), &enclave.QueryAttestedVerificationReportRequest{})
if err != nil {
return err
}
if err := ias.VerifyReport(res.Report, res.Signature, res.SigningCert, time.Now()); err != nil {
return err
}
if _, err := ias.ParseAndValidateAVR(res.Report); err != nil {
return err
}
header := &lcptypes.RegisterEnclaveKeyHeader{
Report: res.Report,
Signature: res.Signature,
SigningCert: res.SigningCert,
}
signer, err := prover.originChain.GetAddress()
if err != nil {
return err
}
msg, err := clienttypes.NewMsgUpdateClient(pathEnd.ClientID, header, signer.String())
if err != nil {
return err
}
if _, err := prover.originChain.SendMsgs([]sdk.Msg{msg}); err != nil {
return err
}
return nil
}
func activateClient(pathEnd *core.PathEnd, src, dst *core.ProvableChain) error {
srcProver := src.Prover.(*Prover)
if err := srcProver.initServiceClient(); err != nil {
return err
}
// 1. LCP synchronises with the latest header of the upstream chain
updates, err := srcProver.syncUpstreamHeader(true)
if err != nil {
return err
}
signer, err := dst.Chain.GetAddress()
if err != nil {
return err
}
// 2. Create a `MsgUpdateClient`s to apply to the LCP Client with the results of 1.
var msgs []sdk.Msg
for _, update := range updates {
updateClientHeader := &lcptypes.UpdateClientHeader{
Commitment: update.Commitment,
Signer: update.Signer,
Signature: update.Signature,
}
if err := updateClientHeader.ValidateBasic(); err != nil {
return err
}
msg, err := clienttypes.NewMsgUpdateClient(pathEnd.ClientID, updateClientHeader, signer.String())
if err != nil {
return err
}
msgs = append(msgs, msg)
}
// 3. Submit the msgs to the LCP Client
if _, err := dst.SendMsgs(msgs); err != nil {
return err
}
return nil
}
type LCPQuerier struct {
serviceClient LCPServiceClient
clientID string
}
var _ core.ChainInfoICS02Querier = (*LCPQuerier)(nil)
func NewLCPQuerier(serviceClient LCPServiceClient, clientID string) LCPQuerier {
return LCPQuerier{
serviceClient: serviceClient,
clientID: clientID,
}
}
func (q LCPQuerier) ChainID() string {
return "lcp"
}
// LatestHeight returns the latest height of the chain
func (q LCPQuerier) LatestHeight() (ibcexported.Height, error) {
return clienttypes.ZeroHeight(), nil
}
// QueryClientState returns the client state of dst chain
// height represents the height of dst chain
func (q LCPQuerier) QueryClientState(ctx core.QueryContext) (*clienttypes.QueryClientStateResponse, error) {
res, err := q.serviceClient.Client(ctx.Context(), &elc.QueryClientRequest{ClientId: q.clientID})
if err != nil {
return nil, err
}
return &clienttypes.QueryClientStateResponse{
ClientState: res.ClientState,
}, nil
}
// QueryClientConsensusState retrevies the latest consensus state for a client in state at a given height
func (q LCPQuerier) QueryClientConsensusState(ctx core.QueryContext, dstClientConsHeight ibcexported.Height) (*clienttypes.QueryConsensusStateResponse, error) {
// TODO add query_client_consensus support to ecall-handler
panic("not implemented error")
}