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prover.go
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prover.go
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package mock
import (
"context"
"crypto/sha256"
"time"
"github.com/cosmos/cosmos-sdk/codec"
sdk "github.com/cosmos/cosmos-sdk/types"
clienttypes "github.com/cosmos/ibc-go/modules/core/02-client/types"
conntypes "github.com/cosmos/ibc-go/modules/core/03-connection/types"
chantypes "github.com/cosmos/ibc-go/modules/core/04-channel/types"
ibcexported "github.com/cosmos/ibc-go/modules/core/exported"
mocktypes "github.com/datachainlab/ibc-mock-client/modules/light-clients/xx-mock/types"
"github.com/hyperledger-labs/yui-relayer/core"
)
type Prover struct {
chain core.ChainI
sequence uint64
}
var _ core.ProverI = (*Prover)(nil)
func NewProver(chain core.ChainI, sequence uint64) *Prover {
return &Prover{chain: chain, sequence: sequence}
}
func (pr *Prover) Init(homePath string, timeout time.Duration, codec codec.ProtoCodecMarshaler, debug bool) error {
return nil
}
// SetRelayInfo sets source's path and counterparty's info to the chain
func (pr *Prover) SetRelayInfo(_ *core.PathEnd, _ *core.ProvableChain, _ *core.PathEnd) error {
return nil // prover uses chain's path instead
}
func (pr *Prover) SetupForRelay(ctx context.Context) error {
return nil
}
// GetChainID returns the chain ID
func (pr *Prover) GetChainID() string {
return pr.chain.ChainID()
}
// QueryLatestHeader returns the latest header from the chain
func (pr *Prover) QueryLatestHeader() (out core.HeaderI, err error) {
var header = mocktypes.Header{
Height: &clienttypes.Height{
RevisionNumber: 0,
RevisionHeight: pr.sequence,
},
Timestamp: uint64(time.Now().UnixNano()),
}
return &header, nil
}
// GetLatestLightHeight returns the latest height on the light client
func (pr *Prover) GetLatestLightHeight() (int64, error) {
return -1, nil
}
// CreateMsgCreateClient creates a CreateClientMsg to this chain
func (pr *Prover) CreateMsgCreateClient(clientID string, dstHeader core.HeaderI, signer sdk.AccAddress) (*clienttypes.MsgCreateClient, error) {
h := dstHeader.(*mocktypes.Header)
clientState := &mocktypes.ClientState{
LatestHeight: h.Height,
}
consensusState := &mocktypes.ConsensusState{
Timestamp: h.Timestamp,
}
return clienttypes.NewMsgCreateClient(
clientState,
consensusState,
signer.String(),
)
}
// SetupHeader creates a new header based on a given header
func (pr *Prover) SetupHeader(dst core.LightClientIBCQueryierI, baseSrcHeader core.HeaderI) (core.HeaderI, error) {
return baseSrcHeader.(*mocktypes.Header), nil
}
// UpdateLightWithHeader updates a header on the light client and returns the header and height corresponding to the chain
func (pr *Prover) UpdateLightWithHeader() (header core.HeaderI, provableHeight int64, queryableHeight int64, err error) {
h, err := pr.QueryLatestHeader()
if err != nil {
return nil, -1, -1, err
}
chainHeight, err := pr.chain.GetLatestHeight()
if err != nil {
return nil, -1, -1, err
}
return h, chainHeight, chainHeight, nil
}
// QueryClientConsensusState returns the ClientConsensusState and its proof
func (pr *Prover) QueryClientConsensusStateWithProof(height int64, dstClientConsHeight ibcexported.Height) (*clienttypes.QueryConsensusStateResponse, error) {
res, err := pr.chain.QueryClientConsensusState(height, dstClientConsHeight)
if err != nil {
return nil, err
}
bz, err := pr.chain.Codec().Marshal(res.ConsensusState)
if err != nil {
return nil, err
}
res.Proof = makeProof(bz)
res.ProofHeight = clienttypes.NewHeight(0, pr.sequence)
return res, nil
}
// QueryClientStateWithProof returns the ClientState and its proof
func (pr *Prover) QueryClientStateWithProof(height int64) (*clienttypes.QueryClientStateResponse, error) {
res, err := pr.chain.QueryClientState(height)
if err != nil {
return nil, err
}
bz, err := pr.chain.Codec().Marshal(res.ClientState)
if err != nil {
return nil, err
}
res.Proof = makeProof(bz)
res.ProofHeight = clienttypes.NewHeight(0, pr.sequence)
return res, nil
}
// QueryConnectionWithProof returns the Connection and its proof
func (pr *Prover) QueryConnectionWithProof(height int64) (*conntypes.QueryConnectionResponse, error) {
res, err := pr.chain.QueryConnection(height)
if err != nil {
return nil, err
}
bz, err := pr.chain.Codec().Marshal(res.Connection)
if err != nil {
return nil, err
}
res.Proof = makeProof(bz)
res.ProofHeight = clienttypes.NewHeight(0, pr.sequence)
return res, nil
}
// QueryChannelWithProof returns the Channel and its proof
func (pr *Prover) QueryChannelWithProof(height int64) (chanRes *chantypes.QueryChannelResponse, err error) {
res, err := pr.chain.QueryChannel(height)
if err != nil {
return nil, err
}
bz, err := pr.chain.Codec().Marshal(res.Channel)
if err != nil {
return nil, err
}
res.Proof = makeProof(bz)
res.ProofHeight = clienttypes.NewHeight(0, pr.sequence)
return res, nil
}
// QueryPacketCommitmentWithProof returns the packet commitment and its proof
func (pr *Prover) QueryPacketCommitmentWithProof(height int64, seq uint64) (comRes *chantypes.QueryPacketCommitmentResponse, err error) {
res, err := pr.chain.QueryPacketCommitment(height, seq)
if err != nil {
return nil, err
}
res.Proof = res.Commitment
res.ProofHeight = clienttypes.NewHeight(0, pr.sequence)
return res, nil
}
// QueryPacketAcknowledgementCommitmentWithProof returns the packet acknowledgement commitment and its proof
func (pr *Prover) QueryPacketAcknowledgementCommitmentWithProof(height int64, seq uint64) (ackRes *chantypes.QueryPacketAcknowledgementResponse, err error) {
res, err := pr.chain.QueryPacketAcknowledgementCommitment(height, seq)
if err != nil {
return nil, err
}
res.Proof = res.Acknowledgement
res.ProofHeight = clienttypes.NewHeight(0, pr.sequence)
return res, nil
}
func makeProof(bz []byte) []byte {
h := sha256.Sum256(bz)
return h[:]
}