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Fix IBC query height issue for 0.42.x backport #10156

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Fix IBC query height issue for 0.42.x backport #10156

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10 changes: 4 additions & 6 deletions x/ibc/core/client/query.go
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Original file line number Diff line number Diff line change
Expand Up @@ -22,25 +22,23 @@ import (
// at the lastest state available.
// Issue: https://github.com/cosmos/cosmos-sdk/issues/6567
func QueryTendermintProof(clientCtx client.Context, key []byte) ([]byte, []byte, clienttypes.Height, error) {
height := clientCtx.Height

// ABCI queries at heights 1, 2 or less than or equal to 0 are not supported.
// Base app does not support queries for height less than or equal to 1.
// Therefore, a query at height 2 would be equivalent to a query at height 3.
// A height of 0 will query with the lastest state.
if height != 0 && height <= 2 {
if clientCtx.Height != 0 && clientCtx.Height <= 2 {
return nil, nil, clienttypes.Height{}, fmt.Errorf("proof queries at height <= 2 are not supported")
}

// Use the IAVL height if a valid tendermint height is passed in.
// A height of 0 will query with the latest state.
if height != 0 {
height--
if clientCtx.Height != 0 {
clientCtx.Height = clientCtx.Height - 1
}

req := abci.RequestQuery{
Path: fmt.Sprintf("store/%s/key", host.StoreKey),
Height: height,
Height: clientCtx.Height,
Data: key,
Prove: true,
}
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