Merge PR #5618: Add test of missing verifier in cli context

CHANGELOG.md

@@ -50,6 +50,7 @@ balances or a single balance by denom when the `denom` query parameter is presen
 ### Bug Fixes
 
 * (x/bank) [\#5531](https://github.com/cosmos/cosmos-sdk/issues/5531) Added missing amount event to MsgMultiSend, emitted for each output.
+* (client) [\#5618](https://github.com/cosmos/cosmos-sdk/pull/5618) Fix crash on the client when the verifier is not set. 
 
 ### State Machine Breaking
 

client/context/query.go

@@ -130,6 +130,9 @@ func (ctx CLIContext) query(path string, key tmbytes.HexBytes) ([]byte, int64, e
 
 // Verify verifies the consensus proof at given height.
 func (ctx CLIContext) Verify(height int64) (tmtypes.SignedHeader, error) {
+	if ctx.Verifier == nil {
+		return tmtypes.SignedHeader{}, fmt.Errorf("missing valid certifier to verify data from distrusted node")
+	}
 	check, err := tmliteProxy.GetCertifiedCommit(height, ctx.Client, ctx.Verifier)
 	switch {
 	case tmliteErr.IsErrCommitNotFound(err):