fix(statics): set Pearl testnet block explorer URL

modules/statics/src/networks.ts

@@ -1466,6 +1466,7 @@ class Pearl extends Mainnet implements UtxoNetwork {
   family = CoinFamily.PEARL;
   /** wasm-utxo CoinName, not a utxo-lib network - see note above */
   utxolibName = 'pearl';
+  // No mainnet Pearl block explorer exists yet - the chain has not launched mainnet.
   explorerUrl = undefined;
 }
 
@@ -1474,7 +1475,7 @@ class PearlTestnet extends Testnet implements UtxoNetwork {
   family = CoinFamily.PEARL;
   /** wasm-utxo CoinName, not a utxo-lib network - see note above */
   utxolibName = 'tpearl';
-  explorerUrl = undefined;
+  explorerUrl = 'https://blockbook.testnet.pearlresearch.ai/tx/';
 }
 
 class Near extends Mainnet implements AccountNetwork {

modules/statics/test/unit/networks.ts

@@ -89,6 +89,16 @@ Object.entries(Networks).forEach(([category, networks]) => {
         );
       });
     });
+
+    describe('Pearl Network', function () {
+      it('should have a testnet explorer URL (CECHO-2178)', function () {
+        Networks.test.pearl.explorerUrl.should.equal('https://blockbook.testnet.pearlresearch.ai/tx/');
+      });
+
+      it('has no mainnet explorer URL yet - Pearl has not launched mainnet', function () {
+        should(Networks.main.pearl.explorerUrl).be.undefined();
+      });
+    });
   });
 });