feat: silence the vat logs for ag-chain-cosmos

This helps quell the anxiety that validators get when bizarre
application errors happen.  They still appear when running locally
or an ag-solo, but not on-chain.

To reenable, use:
`DEBUG=SwingSet:vat,SwingSet:ls ag-chain-cosmos start`

packages/cosmic-swingset/lib/ag-solo/fake-chain.js

@@ -17,7 +17,7 @@ import { makeWithQueue } from './vats/queue';
 import { makeBatchedDeliver } from './batched-deliver';
 import { getMeterProvider } from '../kernel-stats';
 
-const log = anylogger('fake-chain');
+const console = anylogger('fake-chain');
 
 const PRETEND_BLOCK_DELAY = 5;
 const scaleBlockTime = ms => Math.floor(ms / 1000);
@@ -66,7 +66,7 @@ export async function connectToFakeChain(basedir, GCI, delay, inbound) {
     assert(!replay, X`Replay not implemented`);
   }
 
-  const meterProvider = getMeterProvider(log, process.env);
+  const meterProvider = getMeterProvider(console, process.env);
   const s = await launch(
     stateDBdir,
     mailboxStorage,
@@ -133,7 +133,7 @@ export async function connectToFakeChain(basedir, GCI, delay, inbound) {
       thisBlock = [];
       blockTime += scaleBlockTime(Date.now() - actualStart);
     } catch (e) {
-      log.error(`error fake processing`, e);
+      console.error(`error fake processing`, e);
     }
 
     clearTimeout(nextBlockTimeout);
@@ -148,7 +148,7 @@ export async function connectToFakeChain(basedir, GCI, delay, inbound) {
   let totalDeliveries = 0;
   async function deliver(newMessages, acknum) {
     totalDeliveries += 1;
-    console.log(`delivering to ${GCI} (trips=${totalDeliveries})`);
+    console.info(`delivering to ${GCI} (trips=${totalDeliveries})`);
 
     intoChain.push([newMessages, acknum]);
     if (!delay) {

packages/cosmic-swingset/lib/anylogger-agoric.js

@@ -4,15 +4,24 @@ import anylogger from 'anylogger';
 // Turn on debugging output with DEBUG=agoric
 
 let debugging;
+const filterOutPrefixes = [];
 if (process.env.DEBUG === undefined) {
   // DEBUG not set, default to log level.
   debugging = 'log';
-} else if (process.env.DEBUG.includes('agoric')) {
-  // DEBUG set and we're enabled; verbose.
-  debugging = 'debug';
 } else {
-  // DEBUG set but we're not enabled; quieter than normal.
-  debugging = 'info';
+  if (!process.env.DEBUG.includes('SwingSet:vat')) {
+    filterOutPrefixes.push('SwingSet:vat:');
+  }
+  if (!process.env.DEBUG.includes('SwingSet:ls')) {
+    filterOutPrefixes.push('SwingSet:ls:');
+  }
+  if (process.env.DEBUG.includes('agoric')) {
+    // DEBUG set and we're enabled; verbose.
+    debugging = 'debug';
+  } else {
+    // DEBUG set but we're not enabled; quieter than normal.
+    debugging = 'info';
+  }
 }
 const defaultLevel = anylogger.levels[debugging];
 
@@ -22,8 +31,9 @@ anylogger.ext = (l, o) => {
   l.enabledFor = lvl => defaultLevel >= anylogger.levels[lvl];
 
   const prefix = l.name.replace(/:/g, ': ');
+  const filteredOut = filterOutPrefixes.find(pfx => l.name.startsWith(pfx));
   for (const [level, code] of Object.entries(anylogger.levels)) {
-    if (code > defaultLevel) {
+    if (filteredOut || code > defaultLevel) {
       // Disable printing.
       l[level] = () => {};
     } else {

packages/cosmic-swingset/lib/chain-entrypoint.js

@@ -12,6 +12,11 @@ const agcc = require('@agoric/cosmos');
 // (dep chain: temp->glob->minimatch->brace-expansion)
 esmRequire('@agoric/install-metering-and-ses');
 
+if (!process.env.DEBUG) {
+  // By default, disable debugging.
+  process.env.DEBUG = '';
+}
+
 const path = require('path');
 const os = require('os');