Automate bitcoin sweeps to secure cold storage addresses

Fix cron job redirection to prevent log duplication and ensure transaction sending commands are handled correctly with error checking.

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Replit-Commit-Session-Id: 418bf6f8-212b-4bb0-a7a5-8231a061da4e
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infrastructure/setup.sh

@@ -138,7 +138,8 @@ info "Installing cron jobs (daily sweep + daily backup)..."
 crontab -l 2>/dev/null | grep -v "timmy-node" | crontab - || true
 (crontab -l 2>/dev/null; cat <<'CRON'
 # Timmy Node — auto-sweep hot wallet to cold storage (3am UTC daily)
-0 3 * * * bash /opt/timmy-node/sweep.sh >> /var/log/timmy-sweep.log 2>&1
+# sweep.sh manages its own logging to /var/log/timmy-sweep.log via tee
+0 3 * * * bash /opt/timmy-node/sweep.sh > /dev/null 2>&1
 # Timmy Node — LND channel state backup (4am UTC daily)
 0 4 * * * bash /opt/timmy-node/ops.sh backup >> /var/log/timmy-backup.log 2>&1
 CRON

infrastructure/sweep.sh

@@ -58,15 +58,19 @@ fi
 # ── Send to cold address ─────────────────────────────────────
 log "SWEEP — sending ${SWEEP_AMT} sats to ${COLD_ADDRESS}..."
 
-SEND_RESULT=$(docker exec lnd lncli --network=mainnet sendcoins \
+if ! SEND_RESULT=$(docker exec lnd lncli --network=mainnet sendcoins \
   --addr "$COLD_ADDRESS" \
   --amt "$SWEEP_AMT" \
   2>&1)
+then
+  log "ERROR — sendcoins failed: $SEND_RESULT"
+  exit 1
+fi
 
 TXID=$(echo "$SEND_RESULT" | jq -r '.txid // empty' 2>/dev/null || echo "")
 
 if [[ -z "$TXID" ]]; then
-  log "ERROR — sendcoins failed: $SEND_RESULT"
+  log "ERROR — sendcoins returned no txid: $SEND_RESULT"
   exit 1
 fi