Where validation of the merkle transaction inclusion proof has failed…

…, when the block contains a single transaction and the block header root hash matches the transaction hash itself, accept the transaction as valid.

helper/query.go

@@ -1,6 +1,7 @@
 package helper
 
 import (
+ "bytes"
  "context"
  "encoding/hex"
  "fmt"
@@ -112,6 +113,16 @@ func ValidateTxResult(cliCtx cosmosContext.CLIContext, resTx *ctypes.ResultTx) e
  }
 
  err = resTx.Proof.Validate(check.Header.DataHash)
+
+ // Accept if only one tx in block and data hash matches tx hash
+ if err != nil &&
+ check.Header.NumTxs == 1 &&
+ bytes.Equal(check.Header.DataHash, resTx.Hash) &&
+ bytes.Equal(check.Header.DataHash, resTx.Tx.Hash()) &&
+ resTx.Index == 0 {
+ err = nil
+ }
+
  if err != nil {
  return err
  }