improve(Relayer): Don't include log about outstanding xchain txfers i…

…f there are 0 txfers (#1944)

* improve(Relayer): Don't include log about outstanding xchain txfers if there are 0 txfers

* Update Relayer.ts

src/relayer/Relayer.ts

@@ -1251,21 +1251,29 @@ export class Relayer {
         if (this.clients.inventoryClient.isInventoryManagementEnabled() && chainId !== hubChainId) {
           // Shortfalls are mapped to deposit output tokens so look up output token in token symbol map.
           const l1Token = this.clients.hubPoolClient.getL1TokenInfoForAddress(token, chainId);
-          crossChainLog =
-            "There is " +
-            formatter(
-              this.clients.inventoryClient.crossChainTransferClient
-                .getOutstandingCrossChainTransferAmount(this.relayerAddress, chainId, l1Token.address, token)
-                // TODO: Add in additional l2Token param here once we can specify it
-                .toString()
-            ) +
-            ` inbound L1->L2 ${symbol} transfers. `;
+          const outstandingCrossChainTransferAmount =
+            this.clients.inventoryClient.crossChainTransferClient.getOutstandingCrossChainTransferAmount(
+              this.relayerAddress,
+              chainId,
+              l1Token.address,
+              token
+            );
+          crossChainLog = outstandingCrossChainTransferAmount.gt(0)
+            ? " There is " +
+              formatter(
+                this.clients.inventoryClient.crossChainTransferClient
+                  .getOutstandingCrossChainTransferAmount(this.relayerAddress, chainId, l1Token.address, token)
+                  // TODO: Add in additional l2Token param here once we can specify it
+                  .toString()
+              ) +
+              ` inbound L1->L2 ${symbol} transfers. `
+            : undefined;
         }
         mrkdwn +=
           ` - ${symbol} cumulative shortfall of ` +
           `${formatter(shortfall.toString())} ` +
           `(have ${formatter(balance.toString())} but need ` +
-          `${formatter(needed.toString())}). ${crossChainLog}` +
+          `${formatter(needed.toString())}).${crossChainLog}` +
           `This is blocking deposits: ${deposits}.\n`;
       });
     });