fix: signed outputs data checker does not work with coinbase txs

src/page.h

@@ -3219,7 +3219,7 @@ namespace xmreg
 
                 // if the output is RingCT, i.e., tx version is 2
                 // need to decode its amount
-                if (td.m_tx.version == 2)
+                if (td.is_rct())
                 {
                     // get tx associated with the given output
                     transaction tx;
@@ -3236,6 +3236,11 @@ namespace xmreg
 
                     public_key tx_pub_key = xmreg::get_tx_pub_key_from_received_outs(tx);
 
+                    // cointbase txs have amounts in plain sight.
+                    // so use amount from ringct, only for non-coinbase txs
+                    if (!is_coinbase(tx))
+                    {
+
                         bool r = decode_ringct(tx.rct_signatures,
                                                tx_pub_key,
                                                prv_view_key,
@@ -3254,7 +3259,10 @@ namespace xmreg
 
                             return mstch::render(full_page, context);
                         }
-                }
+
+                    } //  if (!is_coinbase(tx))
+
+                } // if (td.is_rct())
 
                 uint64_t blk_timestamp = core_storage
                         ->get_db().get_block_timestamp(td.m_block_height);