PR #1340 (adjustment 2)

apps/src/lib/cli.rs

@@ -2499,10 +2499,14 @@ pub mod args {
         /// Synchronize with the network, or exit immediately,
         /// if the Ethereum node has fallen behind.
         pub sync: bool,
+        /// Safe mode overrides keyboard interrupt signals, to ensure
+        /// Ethereum transfers aren't canceled midway through.
+        pub safe_mode: bool,
     }
 
     impl Args for RelayBridgePoolProof {
         fn parse(matches: &ArgMatches) -> Self {
+            let safe_mode = SAFE_MODE.parse(matches);
             let query = Query::parse(matches);
             let hashes = HASH_LIST.parse(matches);
             let relayer = RELAYER.parse(matches);
@@ -2533,11 +2537,16 @@ pub mod args {
                 eth_rpc_endpoint,
                 eth_addr,
                 confirmations,
+                safe_mode,
             }
         }
 
         fn def(app: App) -> App {
             app.add_args::<Query>()
+                .arg(SAFE_MODE.def().about(
+                    "Safe mode overrides keyboard interrupt signals, to \
+                     ensure Ethereum transfers aren't canceled midway through.",
+                ))
                 .arg(HASH_LIST.def().about(
                     "List of Keccak hashes of transfers in the bridge pool.",
                 ))

apps/src/lib/client/eth_bridge/bridge_pool.rs

@@ -27,6 +27,7 @@ use super::super::tx::process_tx;
 use super::{block_on_eth_sync, eth_sync_or_exit};
 use crate::cli::{args, safe_exit, Context};
 use crate::client::eth_bridge::BlockOnEthSync;
+use crate::control_flow::install_shutdown_signal;
 use crate::facade::tendermint_rpc::HttpClient;
 
 const ADD_TRANSFER_WASM: &str = "tx_bridge_pool.wasm";
@@ -180,9 +181,9 @@ async fn construct_bridge_pool_proof(
         println!(
             "{warning}: The following hashes correspond to transfers that \
              have surpassed the security threshold in Namada, therefore have \
-             likely been relayed, but do not yet have a quorum of validator \
-             signatures behind them; thus they are still in the Bridge \
-             pool:\n{warnings:?}",
+             likely been relayed to Ethereum, but do not yet have a quorum of \
+             validator signatures behind them in Namada; thus they are still \
+             in the Bridge pool:\n{warnings:?}",
         );
         print!("\nDo you wish to proceed? (y/n): ");
         std::io::stdout().flush().unwrap();
@@ -263,6 +264,8 @@ pub async fn construct_proof(args: args::BridgePoolProof) {
 
 /// Relay a validator set update, signed off for a given epoch.
 pub async fn relay_bridge_pool_proof(args: args::RelayBridgePoolProof) {
+    let _signal_receiver = args.safe_mode.then(install_shutdown_signal);
+
     if args.sync {
         block_on_eth_sync(BlockOnEthSync {
             url: &args.eth_rpc_endpoint,