Inform client when Electrum server limit exceeded

backend/src/api/bitcoin/electrum-api.ts

@@ -83,6 +83,7 @@ class BitcoindElectrsApi extends BitcoinApi implements AbstractBitcoinApi {
       });
     }
 
+    try {
       const balance = await this.$getScriptHashBalance(addressInfo.scriptPubKey);
       const history = await this.$getScriptHashHistory(addressInfo.scriptPubKey);
 
@@ -105,7 +106,12 @@ class BitcoindElectrsApi extends BitcoinApi implements AbstractBitcoinApi {
           'tx_count': unconfirmed,
         }
       };
-
+    } catch (e) {
+      if (e === 'failed to get confirmed status') {
+        e = 'The number of transactions on this address exceeds the Electrum server limit';
+      }
+      throw new Error(e);
+    }
   }
 
   async $getAddressTransactions(address: string, lastSeenTxId: string): Promise<IEsploraApi.Transaction[]> {
@@ -113,6 +119,8 @@ class BitcoindElectrsApi extends BitcoinApi implements AbstractBitcoinApi {
     if (!addressInfo || !addressInfo.isvalid) {
      return [];
     }
+
+    try {
       const transactions: IEsploraApi.Transaction[] = [];
       const history = await this.$getScriptHashHistory(addressInfo.scriptPubKey);
       history.reverse();
@@ -133,6 +141,12 @@ class BitcoindElectrsApi extends BitcoinApi implements AbstractBitcoinApi {
       }
 
       return transactions;
+    } catch (e) {
+      if (e === 'failed to get confirmed status') {
+        e = 'The number of transactions on this address exceeds the Electrum server limit';
+      }
+      throw new Error(e);
+    }
   }
 
   private $getScriptHashBalance(scriptHash: string): Promise<IElectrumApi.ScriptHashBalance> {

backend/src/routes.ts

@@ -538,7 +538,7 @@ class Routes {
         res.status(500).send('Error fetching transaction.');
       }
     } catch (e) {
-      res.status(500).send(e.message);
+      res.status(500).send(e.message || e);
     }
   }
 
@@ -547,7 +547,7 @@ class Routes {
       const result = await bitcoinApi.$getBlock(req.params.hash);
       res.json(result);
     } catch (e) {
-      res.status(500).send(e.message);
+      res.status(500).send(e.message || e);
     }
   }
 
@@ -580,7 +580,7 @@ class Routes {
 
       res.json(returnBlocks);
     } catch (e) {
-      res.status(500).send(e.message);
+      res.status(500).send(e.message || e);
     }
   }
 
@@ -598,7 +598,7 @@ class Routes {
       }
       res.json(transactions);
     } catch (e) {
-      res.status(500).send(e.message);
+      res.status(500).send(e.message || e);
     }
   }
 
@@ -607,7 +607,7 @@ class Routes {
       const blockHash = await bitcoinApi.$getBlockHash(parseInt(req.params.height, 10));
       res.send(blockHash);
     } catch (e) {
-      res.status(500).send(e.message);
+      res.status(500).send(e.message || e);
     }
   }
 
@@ -621,7 +621,10 @@ class Routes {
       const addressData = await bitcoinApi.$getAddress(req.params.address);
       res.json(addressData);
     } catch (e) {
-      res.status(500).send(e.message);
+      if (e.message && e.message.indexOf('exceeds') > 0) {
+        return res.status(413).send(e.message);
+      }
+      res.status(500).send(e.message || e);
     }
   }
 
@@ -635,7 +638,10 @@ class Routes {
       const transactions = await bitcoinApi.$getAddressTransactions(req.params.address, req.params.txId);
       res.json(transactions);
     } catch (e) {
-      res.status(500).send(e.message);
+      if (e.message && e.message.indexOf('exceeds') > 0) {
+        return res.status(413).send(e.message);
+      }
+      res.status(500).send(e.message || e);
     }
   }
 

frontend/src/app/components/address/address.component.html

@@ -105,6 +105,14 @@
       <span i18n="address.error.loading-address-data">Error loading address data.</span>
       <br>
       <i>{{ error.error }}</i>
+      <ng-template [ngIf]="error.status === 413">
+        <br><br>
+        Consider view this address on the official Mempool website instead:
+        <br>
+        <a href="https://mempool.space/address/{{ addressString }}" target="_blank">https://mempool.space/address/{{ addressString }}</a>
+        <br>
+        <a href="http://mempoolhqx4isw62xs7abwphsq7ldayuidyx2v2oethdhhj6mlo2r6ad.onion/address/{{ addressString }}" target="_blank">http://mempoolhqx4isw62xs7abwphsq7ldayuidyx2v2oethdhhj6mlo2r6ad.onion/address/{{ addressString }}</a>
+      </ng-template>
     </div>
   </ng-template>