update for comments

.env.example

@@ -23,9 +23,10 @@ BATCH_INBOX_ADDRESS=0xff00000000000000000000000000000000042069
 FINALIZATION_PERIOD_SECONDS=12
 ENABLE_GOVERNANCE=false
 
-# Finality gadget RPC
-# note: keep empty string before the Finality Gadget is up
-BBN_FINALITY_GADGET_RPC=""
+# Finality gadget gRPC
+# note: set it after the Finality Gadget is up
+# example value: 11.22.33.44:50051
+BBN_FINALITY_GADGET_RPC=
 
 ## mnemonic "test test test test test test test test test test test junk" 
 

README.md

@@ -60,7 +60,7 @@ For the local L1, the L1 chain ID and pre-funded account private key can be retr
 - `L1_CHAIN_ID`
 - `L1_FUNDED_PRIVATE_KEY`
 
-Keep empty string before the Finality Gadget is up. After the Finality Gadget is up, please update this value and restart the L2 op-node.
+Please update this value after the Finality Gadget is up, and restart the L2 op-node.
 - `BBN_FINALITY_GADGET_RPC`
 
 ### Launch L2
@@ -73,7 +73,7 @@ after it's up, you can test with:
 
 ```bash
 make l2-verify # on the L2 server
-cast block latest --rpc-url http://<l2-server-ip>:9545 # from anywhere
+cast block latest --rpc-url http://<l2-server-ip>:9545 # from anywhere (with foundry installed)
 ```
 
 You can also access the explorer at http://<l2-server-ip>:3001/ and bridge UI at http://<l2-server-ip>:3002/