docs: public void checkCoinBaseHeight(final int height)
              throws VerificationException {
          checkArgument(height >= Block.BLOCK_HEIGHT_GENESIS);
          checkState(isCoinBase());
  
          // Check block height is in coinbase input script
          final TransactionInput in = this.getInputs().get(0);
          final ScriptBuilder builder = new ScriptBuilder();
          builder.number(height);
          final byte[] expected = builder.build().getProgram();
          final byte[] actual = in.getScriptBytes();
          if (actual.length < expected.length) {
              throw new VerificationException.CoinbaseHeightMismatch("Block height mismatch in coinbase.");
          }
          for (int scriptIdx = 0; scriptIdx < expected.length; scriptIdx++) {
              if (actual[scriptIdx] != expected[scriptIdx]) {
                  throw new VerificationException.CoinbaseHeightMismatch("Block height mismatch in coinbase.");
              }
          }
      }