fix(rate-limits): Adding artifical delay to anon requests

package.json

@@ -18,9 +18,9 @@
     "lint": "standard --env mocha --fix",
     "test-v4": "export NETWORK=mainnet && nyc --reporter=text mocha --exit --timeout 60000 test/v4/",
     "test-v5": "export NETWORK=mainnet && nyc --reporter=text mocha --exit --timeout 60000 test/v5/",
-    "test:integration": "mocha test/v4/integration",
+    "test:integration": "mocha test/v5/integration",
-    "test:integration:slpdb": "mocha --timeout 25000 -g '#validate2Single' test/v4/integration/slp*.js",
+    "test:integration:slpdb": "mocha --timeout 25000 -g '#validate2Single' test/v5/integration/slp*.js",
-    "test:integration:nft": "mocha --timeout 25000 -g '#nft' test/v4/integration/nft.js",
+    "test:integration:nft": "mocha --timeout 25000 -g '#nft' test/v5/integration/nft.js",
     "coverage": "nyc report --reporter=text-lcov | coveralls",
     "coverage:report": "export NETWORK=mainnet && nyc --reporter=html mocha --timeout 25000 test/v4/",
     "docs": "./node_modules/.bin/apidoc -i src/routes/v5 -o docs",

src/middleware/route-ratelimit.js

@@ -213,6 +213,10 @@ class RateLimits {
     next()
   }
 
+  sleep (ms) {
+    return new Promise(resolve => setTimeout(resolve, ms))
+  }
+
   // A wrapper for Redis-based rate limiter.
   // Will return false if the user has not exceeded the rate limit. Otherwise
   // it will return the 'res' object with an error status and message, which
@@ -267,6 +271,11 @@ class RateLimits {
 
       res.locals.pointsToConsume = pointsToConsume // Feedback for tests.
 
+      // Add artificial delay to slow down freeloaders.
+      if (pointsToConsume === ANON_LIMITS) {
+        await this.sleep(500)
+      }
+
       // Signal that the user has not exceeded their rate limits.
       return false
     } catch (err) {