diff --git a/.github/workflows/main.yml b/.github/workflows/main.yml
new file mode 100644
index 0000000..25fc395
--- /dev/null
+++ b/.github/workflows/main.yml
@@ -0,0 +1,74 @@
+name: ci
+on:
+  push:
+    branches:
+      - master
+  pull_request:
+    branches:
+      - master
+
+jobs:
+  check:
+    runs-on: ubuntu-latest
+    steps:
+    - uses: actions/checkout@v2
+    - run: npm install
+    - run: npx aegir lint
+    - run: npx aegir ts -p check
+    - run: npx aegir build
+    - run: npx aegir dep-check
+    - uses: ipfs/aegir/actions/bundle-size@master
+      with:
+        github_token: ${{ secrets.GITHUB_TOKEN }}
+  test-node:
+    needs: check
+    runs-on: ${{ matrix.os }}
+    strategy:
+      matrix:
+        os: [windows-latest, ubuntu-latest, macos-latest]
+        node: [14, 15]
+      fail-fast: true
+    steps:
+      - uses: actions/checkout@v2
+      - uses: actions/setup-node@v1
+        with:
+          node-version: ${{ matrix.node }}
+      - run: npm install
+      - run: npx nyc --reporter=lcov aegir test -t node -- --bail
+      - uses: codecov/codecov-action@v1
+  test-chrome:
+    needs: check
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v2
+      - run: npm install
+      - run: npx aegir test -t browser -t webworker --bail
+  test-firefox:
+    needs: check
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v2
+      - run: npm install
+      - run: npx aegir test -t browser -t webworker --bail -- --browsers FirefoxHeadless
+  test-webkit:
+    needs: check
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v2
+      - uses: microsoft/playwright-github-action@v1
+      - run: npm install
+      - run: npx aegir test -t browser -t webworker --bail -- --browser webkit
+  test-electron-main:
+    needs: check
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v2
+      - run: npm install
+      - run: npx xvfb-maybe aegir test -t electron-main --bail
+  test-electron-renderer:
+    needs: check
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v2
+      - run: npm install
+      - run: npx xvfb-maybe aegir test -t electron-renderer --bail
\ No newline at end of file
diff --git a/.travis.yml b/.travis.yml
deleted file mode 100644
index bd3dcaf..0000000
--- a/.travis.yml
+++ /dev/null
@@ -1,52 +0,0 @@
-language: node_js
-cache: npm
-stages:
-  - check
-  - test
-  - cov
-
-node_js:
-  - '10'
-  - '12'
-
-os:
-  - linux
-  - osx
-
-script: npx nyc -s npm run test:node -- --bail
-after_success: npx nyc report --reporter=text-lcov > coverage.lcov && npx codecov
-
-jobs:
-  include:
-    - os: windows
-      filter_secrets: false
-      cache: false
-
-    - stage: check
-      script:
-        - npx aegir commitlint --travis
-        - npx aegir dep-check
-        - npm run lint
-
-    - stage: test
-      name: chrome
-      addons:
-        chrome: stable
-      script: npx aegir test -t browser -t webworker
-
-    - stage: test
-      name: firefox
-      addons:
-        firefox: latest
-      script: npx aegir test -t browser -t webworker -- --browsers FirefoxHeadless
-
-    - stage: test
-      name: electron
-      services:
-        - xvfb
-      script:
-        - npm run test:electron
-        - npm run test:electron-renderer
-
-notifications:
-  email: false
diff --git a/package.json b/package.json
index be3f1d7..1d50cfa 100644
--- a/package.json
+++ b/package.json
@@ -4,7 +4,21 @@
   "description": "Package to aggregate shared logic and dependencies for the libp2p ecosystem",
   "leadMaintainer": "Vasco Santos <santos.vasco10@gmail.com>",
   "main": "src/index.js",
+  "types": "dist/src/index.d.ts",
+  "typesVersions": {
+    "*": {
+      "src/*": [
+        "dist/src/*",
+        "dist/src/*/index"
+      ]
+    }
+  },
+  "files": [
+    "src",
+    "dist"
+  ],
   "scripts": {
+    "prepare": "aegir build --no-bundle",
     "test": "aegir test",
     "test:browser": "aegir test -t browser",
     "test:node": "aegir test -t node",
@@ -29,18 +43,21 @@
   },
   "homepage": "https://github.com/libp2p/js-libp2p-utils#readme",
   "devDependencies": {
-    "aegir": "^27.0.0",
+    "@types/debug": "^4.1.5",
+    "aegir": "^32.1.0",
     "it-pair": "^1.0.0",
     "it-pipe": "^1.1.0",
-    "streaming-iterables": "^5.0.3"
+    "libp2p-interfaces": "^0.9.0",
+    "streaming-iterables": "^5.0.3",
+    "util": "^0.12.3"
   },
   "dependencies": {
     "abortable-iterator": "^3.0.0",
-    "debug": "^4.2.0",
-    "err-code": "^2.0.3",
-    "ip-address": "^6.1.0",
+    "debug": "^4.3.0",
+    "err-code": "^3.0.1",
+    "ip-address": "^7.1.0",
     "is-loopback-addr": "^1.0.0",
-    "multiaddr": "^8.0.0",
+    "multiaddr": "^8.1.2",
     "private-ip": "^2.1.1"
   },
   "contributors": [
diff --git a/src/address-sort.js b/src/address-sort.js
index 0a49143..9e9468e 100644
--- a/src/address-sort.js
+++ b/src/address-sort.js
@@ -2,6 +2,16 @@
 
 const isPrivate = require('./multiaddr/is-private')
 
+/**
+ * @typedef {import('multiaddr')} Multiaddr
+ */
+
+/**
+ * @typedef {Object} Address
+ * @property {Multiaddr} multiaddr peer multiaddr.
+ * @property {boolean} isCertified obtained from a signed peer record.
+ */
+
 /**
  * Compare function for array.sort().
  * This sort aims to move the private adresses to the end of the array.
diff --git a/src/ip-port-to-multiaddr.js b/src/ip-port-to-multiaddr.js
index f928b60..dfd27f0 100644
--- a/src/ip-port-to-multiaddr.js
+++ b/src/ip-port-to-multiaddr.js
@@ -1,5 +1,9 @@
 'use strict'
 
+const debug = require('debug')
+const log = Object.assign(debug('libp2p:ip-port-to-multiaddr'), {
+  error: debug('libp2p:ip-port-to-multiaddr:err')
+})
 const multiaddr = require('multiaddr')
 const errCode = require('err-code')
 const { Address4, Address6 } = require('ip-address')
@@ -21,25 +25,31 @@ function ipPortToMultiaddr (ip, port) {
     throw errCode(new Error(`invalid ip provided: ${ip}`), errors.ERR_INVALID_IP_PARAMETER)
   }
 
-  port = parseInt(port)
+  if (typeof port === 'string') {
+    port = parseInt(port)
+  }
 
   if (isNaN(port)) {
     throw errCode(new Error(`invalid port provided: ${port}`), errors.ERR_INVALID_PORT_PARAMETER)
   }
 
-  if (new Address4(ip).isValid()) {
+  try {
+    // Test valid IPv4
+    new Address4(ip) // eslint-disable-line no-new
     return multiaddr(`/ip4/${ip}/tcp/${port}`)
-  }
+  } catch {}
 
-  const ip6 = new Address6(ip)
-
-  if (ip6.isValid()) {
+  try {
+    // Test valid IPv6
+    const ip6 = new Address6(ip)
     return ip6.is4()
       ? multiaddr(`/ip4/${ip6.to4().correctForm()}/tcp/${port}`)
       : multiaddr(`/ip6/${ip}/tcp/${port}`)
+  } catch (err) {
+    const errMsg = `invalid ip:port for creating a multiaddr: ${ip}:${port}`
+    log.error(errMsg)
+    throw errCode(new Error(errMsg), errors.ERR_INVALID_IP)
   }
-
-  throw errCode(new Error(`invalid ip:port for creating a multiaddr: ${ip}:${port}`), errors.ERR_INVALID_IP)
 }
 
 module.exports = ipPortToMultiaddr
diff --git a/src/multiaddr/is-loopback.js b/src/multiaddr/is-loopback.js
index 1c11c1c..b30b709 100644
--- a/src/multiaddr/is-loopback.js
+++ b/src/multiaddr/is-loopback.js
@@ -1,7 +1,12 @@
 'use strict'
 
+// @ts-ignore is-loopback-addr does not publish types
 const isLoopbackAddr = require('is-loopback-addr')
 
+/**
+ * @typedef {import('multiaddr')} Multiaddr
+ */
+
 /**
  * Check if a given multiaddr is a loopback address.
  *
diff --git a/src/multiaddr/is-private.js b/src/multiaddr/is-private.js
index 69192b7..67e293b 100644
--- a/src/multiaddr/is-private.js
+++ b/src/multiaddr/is-private.js
@@ -1,7 +1,12 @@
 'use strict'
 
+// @ts-ignore private-ip does not publish types
 const isIpPrivate = require('private-ip')
 
+/**
+ * @typedef {import('multiaddr')} Multiaddr
+ */
+
 /**
  * Check if a given multiaddr has a private address.
  *
diff --git a/src/stream-to-ma-conn.js b/src/stream-to-ma-conn.js
index 91a3f4b..335d461 100644
--- a/src/stream-to-ma-conn.js
+++ b/src/stream-to-ma-conn.js
@@ -1,24 +1,40 @@
 'use strict'
 
-const abortable = require('abortable-iterator')
-const log = require('debug')('libp2p:stream:converter')
+const { source: abortable } = require('abortable-iterator')
+const debug = require('debug')
+const log = debug('libp2p:stream:converter')
+
+/**
+ * @typedef {import('multiaddr')} Multiaddr
+ * @typedef {import('libp2p-interfaces/src/stream-muxer/types').MuxedStream} MuxedStream
+ *
+ * @typedef {Object} Timeline
+ * @property {number} open - connection opening timestamp.
+ * @property {number} [upgraded] - connection upgraded timestamp.
+ * @property {number} [close]
+ */
 
 /**
  * Convert a duplex iterable into a MultiaddrConnection.
  * https://github.com/libp2p/interface-transport#multiaddrconnection
  *
  * @param {object} streamProperties
- * @param {DuplexStream} streamProperties.stream
+ * @param {MuxedStream} streamProperties.stream
  * @param {Multiaddr} streamProperties.remoteAddr
  * @param {Multiaddr} streamProperties.localAddr
  * @param {object} [options]
  * @param {AbortSignal} [options.signal]
+ * @returns {import('libp2p-interfaces/src/transport/types').MultiaddrConnection}
  */
 function streamToMaConnection ({ stream, remoteAddr, localAddr }, options = {}) {
   const { sink, source } = stream
   const maConn = {
+    /**
+     * @param {Uint8Array} source
+     */
     async sink (source) {
       if (options.signal) {
+        // @ts-ignore ts infers source template will be a number
         source = abortable(source, options.signal)
       }
 
@@ -35,16 +51,15 @@ function streamToMaConnection ({ stream, remoteAddr, localAddr }, options = {})
       }
       close()
     },
-
     source: options.signal ? abortable(source, options.signal) : source,
     conn: stream,
     localAddr,
     remoteAddr,
-    timeline: { open: Date.now() },
-
+    /** @type {Timeline} */
+    timeline: { open: Date.now(), close: undefined },
     close () {
-      sink([])
-      close()
+      sink(new Uint8Array(0))
+      return close()
     }
   }
 
@@ -52,6 +67,7 @@ function streamToMaConnection ({ stream, remoteAddr, localAddr }, options = {})
     if (!maConn.timeline.close) {
       maConn.timeline.close = Date.now()
     }
+    return Promise.resolve()
   }
 
   return maConn
diff --git a/tsconfig.json b/tsconfig.json
new file mode 100644
index 0000000..5fe8ea4
--- /dev/null
+++ b/tsconfig.json
@@ -0,0 +1,9 @@
+{
+  "extends": "aegir/src/config/tsconfig.aegir.json",
+  "compilerOptions": {
+    "outDir": "dist"
+  },
+  "include": [
+    "src"
+  ]
+}