/
update.go
192 lines (166 loc) · 5.6 KB
/
update.go
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package types
import (
"github.com/cosmos/cosmos-sdk/codec"
sdk "github.com/cosmos/cosmos-sdk/types"
sdkerrors "github.com/cosmos/cosmos-sdk/types/errors"
clienttypes "github.com/cosmos/ibc-go/modules/core/02-client/types"
"github.com/cosmos/ibc-go/modules/core/exported"
)
// CheckHeaderAndUpdateState checks if the provided header is valid and updates
// the consensus state if appropriate. It returns an error if:
// - the header provided is not parseable to a solo machine header
// - the header sequence does not match the current sequence
// - the header timestamp is less than the consensus state timestamp
// - the currently registered public key did not provide the update signature
func (cs ClientState) CheckHeaderAndUpdateState(
ctx sdk.Context, cdc codec.BinaryCodec, clientStore sdk.KVStore,
header exported.Header,
) (exported.ClientState, exported.ConsensusState, error) {
fabHeader, ok := header.(*Header)
if !ok {
return nil, nil, sdkerrors.Wrap(
clienttypes.ErrInvalidHeader, "header is not from Fabric",
)
}
if err := checkValidity(cs, *fabHeader); err != nil {
return nil, nil, err
}
newClientState, consensusState := update(cs, *fabHeader)
return newClientState, consensusState, nil
}
// checkValidity checks if the Fabric channel header is valid.
//
// CONTRACT: assumes header.Height > consensusState.Height
func checkValidity(
clientState ClientState, header Header,
) error {
if err := header.ValidateBasic(); err != nil {
return sdkerrors.Wrapf(
clienttypes.ErrInvalidHeader,
err.Error(),
)
}
if header.ChaincodeHeader != nil {
// assert header timestamp is past latest clientstate timestamp
if header.ChaincodeHeader.Sequence.Timestamp <= clientState.GetLatestTimestamp() {
return sdkerrors.Wrapf(
clienttypes.ErrInvalidHeader,
"header blocktime ≤ latest client state block time (%v ≤ %v)",
header.ChaincodeHeader.Sequence.Timestamp, clientState.GetLatestTimestamp(),
)
}
h := clienttypes.NewHeight(0, header.ChaincodeHeader.Sequence.Value)
// TODO use Increment function instead of creating a new instance
if lh := clientState.GetLatestHeight(); !h.EQ(clienttypes.NewHeight(lh.GetRevisionNumber(), lh.GetRevisionHeight()+1)) {
return sdkerrors.Wrapf(
clienttypes.ErrInvalidHeader,
"header sequence != expected client state sequence (%d != %d)", header.ChaincodeHeader.Sequence, lh.GetRevisionHeight()+1,
)
}
if err := VerifyChaincodeHeader(clientState, *header.ChaincodeHeader); err != nil {
return sdkerrors.Wrap(
clienttypes.ErrInvalidHeader,
err.Error(),
)
}
}
if header.ChaincodeInfo != nil {
if len(header.ChaincodeInfo.EndorsementPolicy) == 0 {
return sdkerrors.Wrapf(
clienttypes.ErrInvalidHeader,
"ChaincodeInfo.EndorsementPolicy must be non-empty value",
)
}
if err := VerifyChaincodeInfo(clientState, *header.ChaincodeInfo); err != nil {
return sdkerrors.Wrap(
clienttypes.ErrInvalidHeader,
err.Error(),
)
}
}
if header.MSPHeaders != nil {
if err := VerifyMSPHeaders(clientState, *header.MSPHeaders); err != nil {
return sdkerrors.Wrap(
clienttypes.ErrInvalidHeader,
err.Error(),
)
}
}
return nil
}
// Update
func update(clientState ClientState, header Header) (*ClientState, *ConsensusState) {
var consensusState *ConsensusState
if err := header.ValidateBasic(); err != nil {
panic(err.Error())
}
if header.ChaincodeInfo != nil {
clientState.LastChaincodeInfo = *header.ChaincodeInfo
}
if header.ChaincodeHeader != nil {
clientState.LastChaincodeHeader = *header.ChaincodeHeader
consensusState = NewConsensusState(
header.ChaincodeHeader.Sequence.Timestamp,
)
}
if header.MSPHeaders != nil {
clientState = updateMSPInfos(clientState, *header.MSPHeaders)
}
return &clientState, consensusState
}
// assume MSPHeaders are sorted as validated by ValidateBasic() in advance
func updateMSPInfos(clientState ClientState, mhs MSPHeaders) ClientState {
for _, mh := range mhs.Headers {
clientState = updateMSPInfo(clientState, mh)
}
return clientState
}
func updateMSPInfo(clientState ClientState, mh MSPHeader) ClientState {
switch mh.Type {
case MSPHeaderTypeCreate:
return createMSPInfo(clientState, mh)
case MSPHeaderTypeUpdatePolicy:
return updateMSPPolicy(clientState, mh)
case MSPHeaderTypeUpdateConfig:
return updateMSPConfig(clientState, mh)
case MSPHeaderTypeFreeze:
return freezeMSPInfo(clientState, mh)
default:
panic("invalid MSPHeaderType")
}
}
func createMSPInfo(clientState ClientState, mh MSPHeader) ClientState {
var newInfos []MSPInfo
appended := false
for _, info := range clientState.LastMspInfos.Infos {
if !appended && CompareMSPID(mh.MSPID, info.MSPID) < 0 {
newInfos = append(newInfos, NewMSPInfo(mh.MSPID, mh.Config, mh.Policy), info)
appended = true
continue
}
newInfos = append(newInfos, info)
}
if !appended {
newInfos = append(newInfos, NewMSPInfo(mh.MSPID, mh.Config, mh.Policy))
}
clientState.LastMspInfos.Infos = newInfos
return clientState
}
func updateMSPConfig(clientState ClientState, mh MSPHeader) ClientState {
// assume idx != -1
idx := clientState.LastMspInfos.IndexOf(mh.MSPID)
clientState.LastMspInfos.Infos[idx].Config = mh.Config
return clientState
}
func updateMSPPolicy(clientState ClientState, mh MSPHeader) ClientState {
// assume idx != -1
idx := clientState.LastMspInfos.IndexOf(mh.MSPID)
clientState.LastMspInfos.Infos[idx].Policy = mh.Policy
return clientState
}
func freezeMSPInfo(clientState ClientState, mh MSPHeader) ClientState {
// assume idx != -1
idx := clientState.LastMspInfos.IndexOf(mh.MSPID)
clientState.LastMspInfos.Infos[idx].Freezed = true
return clientState
}