diff --git a/.arclint b/.arclint
index 8fb3fcece..a949e4295 100644
--- a/.arclint
+++ b/.arclint
@@ -1,114 +1,121 @@
 {
     "linters": {
         "generated": {
             "type": "generated"
         },
         "clang-format": {
             "type": "clang-format",
             "version": "7.0",
             "bin": ["clang-format-7", "clang-format"],
             "include": "(^src/.*\\.(h|c|cpp)$)",
             "exclude": [
                 "(^src/(secp256k1|univalue|leveldb)/)"
             ]
         },
         "autopep8": {
             "type": "autopep8",
             "version": ">=1.3.4",
             "include": "(\\.py$)"
         },
         "flake8": {
             "type": "flake8",
             "include": "(\\.py$)",
             "flags": [
                 "--select=E112,E113,E115,E116,E125,E131,E133,E223,E224,E271,E272,E273,E274,E275,E304,E306,E502,E702,E703,E714,E721,E741,E742,E743,F401,F402,F403,F404,F405,F406,F407,F601,F602,F621,F622,F631,F701,F702,F703,F704,F705,F706,F707,F811,F812,F822,F823,F831,W292,W601,W602,W603,W604,W605"
             ]
         },
         "lint-format-strings": {
             "type": "lint-format-strings",
             "include": "(^src/.*\\.(h|c|cpp)$)",
             "exclude": [
                 "(^src/(secp256k1|univalue|leveldb)/)"
             ]
         },
         "check-doc": {
             "type": "check-doc",
             "include": "(^src/.*\\.(h|c|cpp)$)"
         },
         "lint-tests": {
             "type": "lint-tests",
             "include": "(^src/(rpc/|wallet/)?test/.*\\.(cpp)$)"
         },
         "lint-python-format": {
             "type": "lint-python-format",
             "include": "(\\.py$)",
             "exclude": [
                 "(^test/lint/lint-python-format\\.py$)"
             ]
         },
         "phpcs": {
             "type": "phpcs",
             "include": "(\\.php$)",
             "exclude": [
                 "(^arcanist/__phutil_library_.+\\.php$)"
             ],
             "phpcs.standard": "test/lint/phpcs/bitcoinabc_ruleset.xml"
         },
         "lint-locale-dependence": {
             "type": "lint-locale-dependence",
             "include": "(^src/.*\\.(h|cpp)$)",
             "exclude": [
                 "(^src/(crypto/ctaes/|leveldb/|secp256k1/|seeder/|tinyformat.h|univalue/))"
             ]
         },
         "lint-cheader": {
             "type": "lint-cheader",
             "include": "(^src/.*\\.(h|cpp)$)",
             "exclude": [
                 "(^src/(crypto/ctaes|secp256k1|univalue|leveldb)/)"
             ]
         },
         "spelling": {
             "type": "spelling",
             "exclude": [
                 "(^build-aux/m4/)",
                 "(^depends/)",
                 "(^doc/release-notes/)",
                 "(^src/(qt/locale|secp256k1|univalue|leveldb)/)",
                 "(^test/lint/dictionary/)"
             ],
             "spelling.dictionaries": [
                 "test/lint/dictionary/english.json"
             ]
         },
         "lint-assert-with-side-effects": {
             "type": "lint-assert-with-side-effects",
             "include": "(^src/.*\\.(h|cpp)$)",
             "exclude": [
                 "(^src/(secp256k1|univalue|leveldb)/)"
             ]
         },
         "lint-include-quotes": {
             "type": "lint-include-quotes",
             "include": "(^src/.*\\.(h|cpp)$)",
             "exclude": [
                 "(^src/(secp256k1|univalue|leveldb)/)"
             ]
         },
         "lint-include-guard": {
             "type": "lint-include-guard",
             "include": "(^src/.*\\.h$)",
             "exclude": [
                 "(^src/(crypto/ctaes|secp256k1|univalue|leveldb)/)",
                 "(^src/tinyformat.h$)"
             ]
         },
         "lint-include-source": {
             "type": "lint-include-source",
             "include": "(^src/.*\\.(h|c|cpp)$)",
             "exclude": [
                 "(^src/(secp256k1|univalue|leveldb)/)"
             ]
+        },
+        "lint-stdint": {
+            "type": "lint-stdint",
+            "include": "(^src/.*\\.(h|c|cpp)$)",
+            "exclude": [
+                "(^src/(secp256k1|univalue|leveldb)/)"
+            ]
         }
     }
 }
diff --git a/arcanist/.phutil_module_cache b/arcanist/.phutil_module_cache
index 5e4d4249a..cfefd8b20 100644
--- a/arcanist/.phutil_module_cache
+++ b/arcanist/.phutil_module_cache
@@ -1 +1 @@
-{"__symbol_cache_version__":11,"2809b09d2021203b43c57da33d1fe8bf":{"have":{"class":{"AssertWithSideEffectsLinter":210}},"need":{"function":{"pht":439},"class":{"ArcanistLinter":246,"ArcanistLintSeverity":926,"Filesystem":1170}},"xmap":{"AssertWithSideEffectsLinter":["ArcanistLinter"]}},"90a8b110dc475955f15bb81d37268cb5":{"have":{"class":{"AutoPEP8FormatLinter":75}},"need":{"function":{"pht":297,"execx":769,"id":1903},"class":{"ArcanistExternalLinter":104,"ArcanistLintMessage":1910,"Filesystem":1754,"ArcanistLinter":2017,"ArcanistLintSeverity":2095}},"xmap":{"AutoPEP8FormatLinter":["ArcanistExternalLinter"]}},"38f0c676bff5192a344464142caaa253":{"have":{"class":{"CHeaderLinter":99}},"need":{"function":{"pht":611},"class":{"ArcanistLinter":121,"ArcanistLintSeverity":1060,"Filesystem":1307}},"xmap":{"CHeaderLinter":["ArcanistLinter"]}},"a30e4e25376ca05d4ae719915441be9e":{"have":{"class":{"CheckDocLinter":106}},"need":{"function":{"pht":323,"id":1848},"class":{"ArcanistExternalLinter":129,"ArcanistLintMessage":1855,"Filesystem":731,"ArcanistLinter":1903,"ArcanistLintSeverity":1989}},"xmap":{"CheckDocLinter":["ArcanistExternalLinter"]}},"6af7410cfea496ff1d4dcc2624b6b8ea":{"have":{"class":{"ClangFormatLinter":79}},"need":{"function":{"pht":302,"execx":781,"id":1653},"class":{"ArcanistExternalLinter":105,"ArcanistLintMessage":1660,"Filesystem":1504,"ArcanistLinter":1767,"ArcanistLintSeverity":1845}},"xmap":{"ClangFormatLinter":["ArcanistExternalLinter"]}},"9285ad9415f8ebe564f7119e5a72c559":{"have":{"class":{"FormatStringLinter":146}},"need":{"function":{"pht":377,"csprintf":1492,"id":1872},"class":{"ArcanistExternalLinter":173,"ArcanistLintMessage":1879,"Filesystem":827,"ArcanistLinter":1956,"ArcanistLintSeverity":2044}},"xmap":{"FormatStringLinter":["ArcanistExternalLinter"]}},"1f9bac7956f4f948a187828dcc6ba2d0":{"have":{"class":{"IncludeGuardLinter":98}},"need":{"function":{"pht":368},"class":{"ArcanistLinter":125,"ArcanistLintSeverity":721,"Filesystem":970}},"xmap":{"IncludeGuardLinter":["ArcanistLinter"]}},"2cbb6e7228d81557f777ad648704f343":{"have":{"class":{"IncludeQuotesLinter":100}},"need":{"function":{"pht":306},"class":{"ArcanistLinter":128,"ArcanistLintSeverity":663,"Filesystem":964}},"xmap":{"IncludeQuotesLinter":["ArcanistLinter"]}},"224d394856b17878058b4c14acb7178b":{"have":{"class":{"LocaleDependenceLinter":160}},"need":{"function":{"pht":5400},"class":{"ArcanistLinter":191,"ArcanistLintSeverity":5903,"Filesystem":6149}},"xmap":{"LocaleDependenceLinter":["ArcanistLinter"]}},"6f2f22dd0f259fb2eaa284b4fab3bc29":{"have":{"class":{"PythonFormatLinter":123}},"need":{"function":{"pht":353,"id":1838},"class":{"ArcanistExternalLinter":150,"ArcanistLintMessage":1845,"Filesystem":776,"ArcanistLinter":1970,"ArcanistLintSeverity":2053}},"xmap":{"PythonFormatLinter":["ArcanistExternalLinter"]}},"25781df78f6eebfb223296b8265e9d19":{"have":{"class":{"TestsLinter":103}},"need":{"function":{"pht":318,"id":2629},"class":{"ArcanistExternalLinter":123,"ArcanistLintMessage":2636,"Filesystem":776,"ArcanistLinter":2684,"ArcanistLintSeverity":2792}},"xmap":{"TestsLinter":["ArcanistExternalLinter"]}},"f151089cf79fdb8257b2272ed4782d88":{"have":{"class":{"IncludeSourceLinter":99}},"need":{"function":{"pht":391},"class":{"ArcanistLinter":127,"ArcanistLintSeverity":699,"Filesystem":938}},"xmap":{"IncludeSourceLinter":["ArcanistLinter"]}}}
\ No newline at end of file
+{"__symbol_cache_version__":11,"2809b09d2021203b43c57da33d1fe8bf":{"have":{"class":{"AssertWithSideEffectsLinter":210}},"need":{"function":{"pht":439},"class":{"ArcanistLinter":246,"ArcanistLintSeverity":926,"Filesystem":1170}},"xmap":{"AssertWithSideEffectsLinter":["ArcanistLinter"]}},"90a8b110dc475955f15bb81d37268cb5":{"have":{"class":{"AutoPEP8FormatLinter":75}},"need":{"function":{"pht":297,"execx":769,"id":1903},"class":{"ArcanistExternalLinter":104,"ArcanistLintMessage":1910,"Filesystem":1754,"ArcanistLinter":2017,"ArcanistLintSeverity":2095}},"xmap":{"AutoPEP8FormatLinter":["ArcanistExternalLinter"]}},"38f0c676bff5192a344464142caaa253":{"have":{"class":{"CHeaderLinter":99}},"need":{"function":{"pht":611},"class":{"ArcanistLinter":121,"ArcanistLintSeverity":1060,"Filesystem":1307}},"xmap":{"CHeaderLinter":["ArcanistLinter"]}},"a30e4e25376ca05d4ae719915441be9e":{"have":{"class":{"CheckDocLinter":106}},"need":{"function":{"pht":323,"id":1848},"class":{"ArcanistExternalLinter":129,"ArcanistLintMessage":1855,"Filesystem":731,"ArcanistLinter":1903,"ArcanistLintSeverity":1989}},"xmap":{"CheckDocLinter":["ArcanistExternalLinter"]}},"6af7410cfea496ff1d4dcc2624b6b8ea":{"have":{"class":{"ClangFormatLinter":79}},"need":{"function":{"pht":302,"execx":781,"id":1653},"class":{"ArcanistExternalLinter":105,"ArcanistLintMessage":1660,"Filesystem":1504,"ArcanistLinter":1767,"ArcanistLintSeverity":1845}},"xmap":{"ClangFormatLinter":["ArcanistExternalLinter"]}},"9285ad9415f8ebe564f7119e5a72c559":{"have":{"class":{"FormatStringLinter":146}},"need":{"function":{"pht":377,"csprintf":1492,"id":1872},"class":{"ArcanistExternalLinter":173,"ArcanistLintMessage":1879,"Filesystem":827,"ArcanistLinter":1956,"ArcanistLintSeverity":2044}},"xmap":{"FormatStringLinter":["ArcanistExternalLinter"]}},"1f9bac7956f4f948a187828dcc6ba2d0":{"have":{"class":{"IncludeGuardLinter":98}},"need":{"function":{"pht":368},"class":{"ArcanistLinter":125,"ArcanistLintSeverity":721,"Filesystem":970}},"xmap":{"IncludeGuardLinter":["ArcanistLinter"]}},"2cbb6e7228d81557f777ad648704f343":{"have":{"class":{"IncludeQuotesLinter":100}},"need":{"function":{"pht":306},"class":{"ArcanistLinter":128,"ArcanistLintSeverity":663,"Filesystem":964}},"xmap":{"IncludeQuotesLinter":["ArcanistLinter"]}},"f151089cf79fdb8257b2272ed4782d88":{"have":{"class":{"IncludeSourceLinter":99}},"need":{"function":{"pht":391},"class":{"ArcanistLinter":127,"ArcanistLintSeverity":699,"Filesystem":938}},"xmap":{"IncludeSourceLinter":["ArcanistLinter"]}},"ce5dee893bedb5d93466655eede8ac47":{"have":{"class":{"LocaleDependenceLinter":160}},"need":{"function":{"pht":5429},"class":{"ArcanistLinter":191,"ArcanistLintSeverity":5932,"Filesystem":6178}},"xmap":{"LocaleDependenceLinter":["ArcanistLinter"]}},"6f2f22dd0f259fb2eaa284b4fab3bc29":{"have":{"class":{"PythonFormatLinter":123}},"need":{"function":{"pht":353,"id":1838},"class":{"ArcanistExternalLinter":150,"ArcanistLintMessage":1845,"Filesystem":776,"ArcanistLinter":1970,"ArcanistLintSeverity":2053}},"xmap":{"PythonFormatLinter":["ArcanistExternalLinter"]}},"25781df78f6eebfb223296b8265e9d19":{"have":{"class":{"TestsLinter":103}},"need":{"function":{"pht":318,"id":2629},"class":{"ArcanistExternalLinter":123,"ArcanistLintMessage":2636,"Filesystem":776,"ArcanistLinter":2684,"ArcanistLintSeverity":2792}},"xmap":{"TestsLinter":["ArcanistExternalLinter"]}},"09a933fbbf135320585be52750d93831":{"have":{"class":{"StdintLinter":90}},"need":{"function":{"pht":280},"class":{"ArcanistLinter":111,"ArcanistLintSeverity":589,"Filesystem":897}},"xmap":{"StdintLinter":["ArcanistLinter"]}}}
\ No newline at end of file
diff --git a/arcanist/__phutil_library_map__.php b/arcanist/__phutil_library_map__.php
index a7604f9d8..a70ae7955 100644
--- a/arcanist/__phutil_library_map__.php
+++ b/arcanist/__phutil_library_map__.php
@@ -1,40 +1,42 @@
 <?php
 
 /**
  * This file is automatically generated. Use 'arc liberate' to rebuild it.
  *
  * @generated
  * @phutil-library-version 2
  */
 phutil_register_library_map(array(
   '__library_version__' => 2,
   'class' => array(
     'AssertWithSideEffectsLinter' => 'linter/AssertWithSideEffectsLinter.php',
     'AutoPEP8FormatLinter' => 'linter/AutoPEP8Linter.php',
     'CHeaderLinter' => 'linter/CHeaderLinter.php',
     'CheckDocLinter' => 'linter/CheckDocLinter.php',
     'ClangFormatLinter' => 'linter/ClangFormatLinter.php',
     'FormatStringLinter' => 'linter/FormatStringLinter.php',
     'IncludeGuardLinter' => 'linter/IncludeGuardLinter.php',
     'IncludeQuotesLinter' => 'linter/IncludeQuotesLinter.php',
     'IncludeSourceLinter' => 'linter/IncludeSourceLinter.php',
     'LocaleDependenceLinter' => 'linter/LocaleDependenceLinter.php',
     'PythonFormatLinter' => 'linter/PythonFormatLinter.php',
+    'StdintLinter' => 'linter/StdintLinter.php',
     'TestsLinter' => 'linter/TestsLinter.php',
   ),
   'function' => array(),
   'xmap' => array(
     'AssertWithSideEffectsLinter' => 'ArcanistLinter',
     'AutoPEP8FormatLinter' => 'ArcanistExternalLinter',
     'CHeaderLinter' => 'ArcanistLinter',
     'CheckDocLinter' => 'ArcanistExternalLinter',
     'ClangFormatLinter' => 'ArcanistExternalLinter',
     'FormatStringLinter' => 'ArcanistExternalLinter',
     'IncludeGuardLinter' => 'ArcanistLinter',
     'IncludeQuotesLinter' => 'ArcanistLinter',
     'IncludeSourceLinter' => 'ArcanistLinter',
     'LocaleDependenceLinter' => 'ArcanistLinter',
     'PythonFormatLinter' => 'ArcanistExternalLinter',
+    'StdintLinter' => 'ArcanistLinter',
     'TestsLinter' => 'ArcanistExternalLinter',
   ),
 ));
diff --git a/arcanist/linter/StdintLinter.php b/arcanist/linter/StdintLinter.php
new file mode 100644
index 000000000..d7bd7581b
--- /dev/null
+++ b/arcanist/linter/StdintLinter.php
@@ -0,0 +1,57 @@
+<?php
+
+/**
+ * Replace native type by there stdint equivalent when needed.
+ */
+final class StdintLinter extends ArcanistLinter {
+
+  const UNSIGNED_CHAR_FOUND = 1;
+
+  public function getInfoName() {
+    return 'lint-stdint';
+  }
+
+  public function getInfoDescription() {
+    return pht('Replace native type by there stdint equivalent when needed.');
+  }
+
+  public function getLinterName() {
+    return 'STDINT';
+  }
+
+  public function getLinterConfigurationName() {
+    return 'lint-stdint';
+  }
+
+  public function getLintSeverityMap() {
+    return array(
+      self::UNSIGNED_CHAR_FOUND => ArcanistLintSeverity::SEVERITY_WARNING,
+    );
+  }
+
+  public function getLintNameMap() {
+    return array(
+      self::UNSIGNED_CHAR_FOUND => pht('`uint8_t should be preferred over '.
+                                       '`unsigned char``.'),
+    );
+  }
+
+  public function lintPath($path) {
+    $abspath = Filesystem::resolvePath($path, $this->getProjectRoot());
+    $fileContent = Filesystem::readFile($abspath);
+
+    if (preg_match_all('/unsigned char/', $fileContent, $matches,
+      PREG_OFFSET_CAPTURE)) {
+      foreach ($matches[0] as $match) {
+        list($unsignedChar, $offset) = $match;
+
+        $this->raiseLintAtOffset(
+          $offset,
+          self::UNSIGNED_CHAR_FOUND,
+          pht('`uint8_t should be preferred over `unsigned char`'),
+          $unsignedChar,
+          'uint8_t');
+      }
+    }
+  }
+}