diff --git a/.github/stale.yml b/.github/stale.yml
index f4a1843af..ef45d6b62 100644
--- a/.github/stale.yml
+++ b/.github/stale.yml
@@ -4,11 +4,9 @@ daysUntilStale: 1
 daysUntilClose: 2
 # Issues with these labels will never be considered stale
 exemptLabels:
+  - 'Payment: Paid'
   - pinned
   - security
-  - paid
-# Label to use when marking an issue as stale
-staleLabel: wontfix
 # Comment to post when marking an issue as stale. Set to `false` to disable
 markComment: >
   This issue has been automatically marked as stale because it has not had
diff --git a/.github/workflows/danger.yml b/.github/workflows/danger.yml
new file mode 100644
index 000000000..d571441e8
--- /dev/null
+++ b/.github/workflows/danger.yml
@@ -0,0 +1,21 @@
+name: Danger
+
+on:
+  push:
+    branches: [ master ]
+  pull_request:
+    branches: [ master ]
+
+jobs:
+  danger:
+    runs-on: ubuntu-latest
+    steps:
+    - uses: actions/checkout@v2
+    - name: Install gems
+      run: sudo gem install bundler --no-document
+    - name: Bundle update
+      run: bundle update --bundler
+    - name: Run Danger
+      run: danger --verbose
+      env:
+        GITHUB_TOKEN: ${{ secrets.DANGER_TOKEN }}
diff --git a/Dangerfile b/Dangerfile
new file mode 100644
index 000000000..39d7064bd
--- /dev/null
+++ b/Dangerfile
@@ -0,0 +1,109 @@
+require 'find'
+require 'image_size'
+require 'json-schema'
+
+assets_folder = './blockchains'
+allowed_extensions = ['png', 'json']
+allowed_file_names = ['info', 'list', 'logo', 'whitelist', 'blacklist']
+
+# Failures
+# Do not allow files in this directory
+Dir.foreach(assets_folder) \
+  .map { |x| File.expand_path("#{assets_folder}/#{x}") } \
+  .select { |x| File.file?(x) }
+  .map { |x| 
+  fail("Not allowed to have files inside blockchains folder itself. You have to add them inside specific blockchain folder as blockchain/ethereum or blockchain/binance for file: " + x)
+}
+
+Find.find(assets_folder) do |file|
+  file_extension = File.extname(file).delete('.')
+  file_name = File.basename(file, File.extname(file))
+
+  # Skip if directory
+  if File.directory?(file)
+    next
+  end
+
+  if !allowed_extensions.include? file_extension
+    fail("Extension not allowed for file: " + file)
+  end
+
+  if !allowed_file_names.include? file_name
+    fail("Filename not allowed for file: " + file)
+  end
+
+  # Validate JSON content
+  if file_extension == 'json'
+    value = nil
+    begin
+      value = JSON.parse(File.open(file).read)
+    rescue JSON::ParserError, TypeError => e
+      fail("Wrong JSON content in file: " + file)
+    end
+
+    # Validate info.json
+    if file_name == 'info'
+      schema = {
+        "type": "object",
+        "required": ["name", "website", "short_description", "explorer"],
+        "properties": {
+          "name": {"type": "string"},
+          "website": {"type": "string"},
+          "short_description": {"type": "string"},
+          "explorer": {"type": "string"}
+        }
+      }
+      errors = JSON::Validator.fully_validate(schema, value)
+      errors.each { |error| message("#{error} in file #{file}") } 
+    end
+
+    # Validate list.json for validators
+    if file_name == 'list'
+      schema = {
+        "type": "array",
+        "items": {
+          "properties": {
+              "id": { "type": "string" },
+              "name": { "type": "string" },
+              "description": { "type": "string" },
+              "website": { "type": "string" }
+          },
+          "required": ["id", "name", "description", "website"]
+        }
+      }
+      errors = JSON::Validator.fully_validate(schema, value)
+      errors.each { |error| message("#{error} in file #{file}") } 
+    end
+
+    # Validate whitelist, blacklist files
+    if file_name == 'whitelist' || file_name == 'blacklist'
+      schema = {
+        "type": "array",
+        "items": {
+          "type": "string"
+        }
+      }
+      errors = JSON::Validator.fully_validate(schema, value)
+      errors.each { |error| message("#{error} in file #{file}") } 
+    end
+  
+  end
+
+  # Validate images
+  if file_extension == 'png'
+    image_size = ImageSize.path(file)
+
+    if image_size.width > 512 || image_size.height > 512
+      fail("Image width or height is higher than 512px for file: " + file)
+    end
+
+    if image_size.format == 'png'
+      fail("Image should be PNG for file: " + file)
+    end
+
+    # Make sure file size only 100kb
+    if File.size(file).to_f / 1024 > 100
+      fail("Image should less than 100kb for file: " + file)
+    end
+  end
+end
\ No newline at end of file
diff --git a/Gemfile b/Gemfile
new file mode 100644
index 000000000..814ec895f
--- /dev/null
+++ b/Gemfile
@@ -0,0 +1,5 @@
+source "https://rubygems.org"
+
+gem 'danger'
+gem 'image_size', '~> 2.0'
+gem 'json-schema'
\ No newline at end of file
diff --git a/Gemfile.lock b/Gemfile.lock
new file mode 100644
index 000000000..d44e33fed
--- /dev/null
+++ b/Gemfile.lock
@@ -0,0 +1,64 @@
+GEM
+  remote: https://rubygems.org/
+  specs:
+    addressable (2.7.0)
+      public_suffix (>= 2.0.2, < 5.0)
+    claide (1.0.3)
+    claide-plugins (0.9.2)
+      cork
+      nap
+      open4 (~> 1.3)
+    colored2 (3.1.2)
+    cork (0.3.0)
+      colored2 (~> 3.1)
+    danger (6.3.2)
+      claide (~> 1.0)
+      claide-plugins (>= 0.9.2)
+      colored2 (~> 3.1)
+      cork (~> 0.1)
+      faraday (~> 0.9)
+      faraday-http-cache (~> 2.0)
+      git (~> 1.6)
+      kramdown (~> 2.0)
+      kramdown-parser-gfm (~> 1.0)
+      no_proxy_fix
+      octokit (~> 4.7)
+      terminal-table (~> 1)
+    faraday (0.17.3)
+      multipart-post (>= 1.2, < 3)
+    faraday-http-cache (2.1.0)
+      faraday (~> 0.8)
+    git (1.6.0)
+      rchardet (~> 1.8)
+    image_size (2.0.2)
+    json-schema (2.8.1)
+      addressable (>= 2.4)
+    kramdown (2.1.0)
+    kramdown-parser-gfm (1.1.0)
+      kramdown (~> 2.0)
+    multipart-post (2.1.1)
+    nap (1.1.0)
+    no_proxy_fix (0.1.2)
+    octokit (4.18.0)
+      faraday (>= 0.9)
+      sawyer (~> 0.8.0, >= 0.5.3)
+    open4 (1.3.4)
+    public_suffix (4.0.4)
+    rchardet (1.8.0)
+    sawyer (0.8.2)
+      addressable (>= 2.3.5)
+      faraday (> 0.8, < 2.0)
+    terminal-table (1.8.0)
+      unicode-display_width (~> 1.1, >= 1.1.1)
+    unicode-display_width (1.7.0)
+
+PLATFORMS
+  ruby
+
+DEPENDENCIES
+  danger
+  image_size (~> 2.0)
+  json-schema
+
+BUNDLED WITH
+   1.17.2
diff --git a/blockchains/ethereum/assets/0x3453769b660b7EE4261AaA043479Aa3CA02243bf/logo.png b/blockchains/ethereum/assets/0x3453769b660b7EE4261AaA043479Aa3CA02243bf/logo.png
index 742f6fa99..af1c52c38 100644
Binary files a/blockchains/ethereum/assets/0x3453769b660b7EE4261AaA043479Aa3CA02243bf/logo.png and b/blockchains/ethereum/assets/0x3453769b660b7EE4261AaA043479Aa3CA02243bf/logo.png differ
diff --git a/blockchains/ethereum/assets/0xAdae61eaAb45Ac109C068E18e723d5F0436bEea1/logo.png b/blockchains/ethereum/assets/0xAdae61eaAb45Ac109C068E18e723d5F0436bEea1/logo.png
index f3704aa3e..abd39b752 100644
Binary files a/blockchains/ethereum/assets/0xAdae61eaAb45Ac109C068E18e723d5F0436bEea1/logo.png and b/blockchains/ethereum/assets/0xAdae61eaAb45Ac109C068E18e723d5F0436bEea1/logo.png differ
diff --git a/blockchains/ethereum/assets/0xbE8F047Fc2EB324911e8eF9040f175984DC2DC18/logo.png b/blockchains/ethereum/assets/0xbE8F047Fc2EB324911e8eF9040f175984DC2DC18/logo.png
index 2d6afe2e4..65263e04d 100644
Binary files a/blockchains/ethereum/assets/0xbE8F047Fc2EB324911e8eF9040f175984DC2DC18/logo.png and b/blockchains/ethereum/assets/0xbE8F047Fc2EB324911e8eF9040f175984DC2DC18/logo.png differ
diff --git a/blockchains/ethereum/assets/0xfA654D0702ffdAE6FE30272639c83eC4Cbfe6D7d/logo.png b/blockchains/ethereum/assets/0xfA654D0702ffdAE6FE30272639c83eC4Cbfe6D7d/logo.png
index 6580a0fec..2af43844a 100644
Binary files a/blockchains/ethereum/assets/0xfA654D0702ffdAE6FE30272639c83eC4Cbfe6D7d/logo.png and b/blockchains/ethereum/assets/0xfA654D0702ffdAE6FE30272639c83eC4Cbfe6D7d/logo.png differ
diff --git a/blockchains/tezos/validators/assets/tz1Vyuu4EJ5Nym4JcrfRLnp3hpaq1DSEp1Ke/Logo.png b/blockchains/tezos/validators/assets/tz1Vyuu4EJ5Nym4JcrfRLnp3hpaq1DSEp1Ke/Logo.png
deleted file mode 100644
index 139ca9d1b..000000000
Binary files a/blockchains/tezos/validators/assets/tz1Vyuu4EJ5Nym4JcrfRLnp3hpaq1DSEp1Ke/Logo.png and /dev/null differ
diff --git a/blockchains/tron/assets/TFPAuuQym78giRve6iHTf4y7dZJxAkkrUa/info.json b/blockchains/tron/assets/TFPAuuQym78giRve6iHTf4y7dZJxAkkrUa/info.json
index 7d56e2b44..02a9f05af 100644
--- a/blockchains/tron/assets/TFPAuuQym78giRve6iHTf4y7dZJxAkkrUa/info.json
+++ b/blockchains/tron/assets/TFPAuuQym78giRve6iHTf4y7dZJxAkkrUa/info.json
@@ -10,5 +10,6 @@
          "url":"https://twitter.com/streamixio",
          "handle":"Streamixio"
       }
-   ]
+   ],
+   "explorer": "https://tronscan.org/#/token20/TFPAuuQym78giRve6iHTf4y7dZJxAkkrUa"
 }
diff --git a/src/test/helpers.ts b/src/test/helpers.ts
index dca71defc..92ecb0777 100644
--- a/src/test/helpers.ts
+++ b/src/test/helpers.ts
@@ -260,7 +260,10 @@ export const rootDirAllowedFiles = [
     "package.json",
     "README.md",
     ".git",
-    "pricing"
+    "pricing",
+    "Dangerfile",
+    "Gemfile",
+    "Gemfile.lock"
 ]
 
 export const assetFolderAllowedFiles = [