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utils.go
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/
utils.go
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package utils
import (
"context"
errorsmod "cosmossdk.io/errors"
"github.com/cosmos/cosmos-sdk/client"
"github.com/cosmos/cosmos-sdk/codec"
tmtypes "github.com/cometbft/cometbft/types"
"github.com/cosmos/ibc-go/v8/modules/core/02-client/types"
commitmenttypes "github.com/cosmos/ibc-go/v8/modules/core/23-commitment/types"
host "github.com/cosmos/ibc-go/v8/modules/core/24-host"
ibcclient "github.com/cosmos/ibc-go/v8/modules/core/client"
"github.com/cosmos/ibc-go/v8/modules/core/exported"
ibctm "github.com/cosmos/ibc-go/v8/modules/light-clients/07-tendermint"
)
// QueryClientState returns a client state. If prove is true, it performs an ABCI store query
// in order to retrieve the merkle proof. Otherwise, it uses the gRPC query client.
func QueryClientState(
clientCtx client.Context, clientID string, prove bool,
) (*types.QueryClientStateResponse, error) {
if prove {
return QueryClientStateABCI(clientCtx, clientID)
}
queryClient := types.NewQueryClient(clientCtx)
req := &types.QueryClientStateRequest{
ClientId: clientID,
}
return queryClient.ClientState(context.Background(), req)
}
// QueryClientStateABCI queries the store to get the light client state and a merkle proof.
func QueryClientStateABCI(
clientCtx client.Context, clientID string,
) (*types.QueryClientStateResponse, error) {
key := host.FullClientStateKey(clientID)
value, proofBz, proofHeight, err := ibcclient.QueryTendermintProof(clientCtx, key)
if err != nil {
return nil, err
}
// check if client exists
if len(value) == 0 {
return nil, errorsmod.Wrap(types.ErrClientNotFound, clientID)
}
cdc := codec.NewProtoCodec(clientCtx.InterfaceRegistry)
clientState, err := types.UnmarshalClientState(cdc, value)
if err != nil {
return nil, err
}
anyClientState, err := types.PackClientState(clientState)
if err != nil {
return nil, err
}
clientStateRes := types.NewQueryClientStateResponse(anyClientState, proofBz, proofHeight)
return clientStateRes, nil
}
// QueryConsensusState returns a consensus state. If prove is true, it performs an ABCI store
// query in order to retrieve the merkle proof. Otherwise, it uses the gRPC query client.
func QueryConsensusState(
clientCtx client.Context, clientID string, height exported.Height, prove, latestHeight bool,
) (*types.QueryConsensusStateResponse, error) {
if prove {
return QueryConsensusStateABCI(clientCtx, clientID, height)
}
queryClient := types.NewQueryClient(clientCtx)
req := &types.QueryConsensusStateRequest{
ClientId: clientID,
RevisionNumber: height.GetRevisionNumber(),
RevisionHeight: height.GetRevisionHeight(),
LatestHeight: latestHeight,
}
return queryClient.ConsensusState(context.Background(), req)
}
// QueryConsensusStateABCI queries the store to get the consensus state of a light client and a
// merkle proof of its existence or non-existence.
func QueryConsensusStateABCI(
clientCtx client.Context, clientID string, height exported.Height,
) (*types.QueryConsensusStateResponse, error) {
key := host.FullConsensusStateKey(clientID, height)
value, proofBz, proofHeight, err := ibcclient.QueryTendermintProof(clientCtx, key)
if err != nil {
return nil, err
}
// check if consensus state exists
if len(value) == 0 {
return nil, errorsmod.Wrap(types.ErrConsensusStateNotFound, clientID)
}
cdc := codec.NewProtoCodec(clientCtx.InterfaceRegistry)
cs, err := types.UnmarshalConsensusState(cdc, value)
if err != nil {
return nil, err
}
anyConsensusState, err := types.PackConsensusState(cs)
if err != nil {
return nil, err
}
return types.NewQueryConsensusStateResponse(anyConsensusState, proofBz, proofHeight), nil
}
// QueryTendermintHeader takes a client context and returns the appropriate
// tendermint header
func QueryTendermintHeader(clientCtx client.Context) (ibctm.Header, int64, error) {
node, err := clientCtx.GetNode()
if err != nil {
return ibctm.Header{}, 0, err
}
info, err := node.ABCIInfo(context.Background())
if err != nil {
return ibctm.Header{}, 0, err
}
var height int64
if clientCtx.Height != 0 {
height = clientCtx.Height
} else {
height = info.Response.LastBlockHeight
}
commit, err := node.Commit(context.Background(), &height)
if err != nil {
return ibctm.Header{}, 0, err
}
page := 1
count := 10_000
validators, err := node.Validators(context.Background(), &height, &page, &count)
if err != nil {
return ibctm.Header{}, 0, err
}
protoCommit := commit.SignedHeader.ToProto()
protoValset, err := tmtypes.NewValidatorSet(validators.Validators).ToProto()
if err != nil {
return ibctm.Header{}, 0, err
}
header := ibctm.Header{
SignedHeader: protoCommit,
ValidatorSet: protoValset,
}
return header, height, nil
}
// QuerySelfConsensusState takes a client context and returns the appropriate
// tendermint consensus state
func QuerySelfConsensusState(clientCtx client.Context) (*ibctm.ConsensusState, int64, error) {
node, err := clientCtx.GetNode()
if err != nil {
return &ibctm.ConsensusState{}, 0, err
}
info, err := node.ABCIInfo(context.Background())
if err != nil {
return &ibctm.ConsensusState{}, 0, err
}
var height int64
if clientCtx.Height != 0 {
height = clientCtx.Height
} else {
height = info.Response.LastBlockHeight
}
commit, err := node.Commit(context.Background(), &height)
if err != nil {
return &ibctm.ConsensusState{}, 0, err
}
page := 1
count := 10_000
nextHeight := height + 1
nextVals, err := node.Validators(context.Background(), &nextHeight, &page, &count)
if err != nil {
return &ibctm.ConsensusState{}, 0, err
}
state := &ibctm.ConsensusState{
Timestamp: commit.Time,
Root: commitmenttypes.NewMerkleRoot(commit.AppHash),
NextValidatorsHash: tmtypes.NewValidatorSet(nextVals.Validators).Hash(),
}
return state, height, nil
}