diff --git a/packages/ripple-address-codec/HISTORY.md b/packages/ripple-address-codec/HISTORY.md
new file mode 100644
index 00000000..13aa7eb4
--- /dev/null
+++ b/packages/ripple-address-codec/HISTORY.md
@@ -0,0 +1,16 @@
+# ripple-address-codec Release History
+
+## 4.0.0 (UNRELEASED)
+
+### Breaking Changes
+
+* `decodeAddress` has been renamed to `decodeAccountID`
+* `isValidAddress` has been renamed to `isValidClassicAddress`
+
+### New Features
+
+* `classicAddressToXAddress` - Derive X-address from classic address, tag, and network ID
+* `encodeXAddress` - Encode account ID, tag, and network ID as an X-address
+* `xAddressToClassicAddress` - Decode an X-address to account ID, tag, and network ID
+* `decodeXAddress` - Convert X-address to classic address, tag, and network ID
+* `isValidXAddress` - Check whether an X-address (X...) is valid
diff --git a/packages/ripple-address-codec/README.md b/packages/ripple-address-codec/README.md
index e2f3f080..de4450b6 100644
--- a/packages/ripple-address-codec/README.md
+++ b/packages/ripple-address-codec/README.md
@@ -1,7 +1,49 @@
 # ripple-address-codec [![NPM](https://img.shields.io/npm/v/ripple-address-codec.svg)](https://npmjs.org/package/ripple-address-codec)
 
+Functions for encoding and decoding XRP Ledger addresses and seeds. Also includes support for encoding/decoding [rippled validator (node) public keys](https://xrpl.org/run-rippled-as-a-validator.html).
+
+## X-address Conversion
+
+All tools and apps in the XRP Ledger ecosystem are encouraged to adopt support for the X-address format. The X-address format is a single Base58 string that encodes an 'Account ID', a (destination) tag, and whether the address is intended for a test network. This prevents users from unintentionally omitting the destination tag when sending and receiving payments and other transactions.
+
 ## API
 
+### classicAddressToXAddress(classicAddress: string, tag: number | false, test: boolean): string
+
+Convert a classic address and (optional) tag to an X-address. If `tag` is `false`, the returned X-address explicitly indicates that the recipient does not want a tag to be used. If `test` is `true`, consumers of the address will know that the address is intended for use on test network(s) and the address will start with `T`.
+
+```js
+> const api = require('ripple-address-codec')
+> api.classicAddressToXAddress('rGWrZyQqhTp9Xu7G5Pkayo7bXjH4k4QYpf', 4294967295)
+'XVLhHMPHU98es4dbozjVtdWzVrDjtV18pX8yuPT7y4xaEHi'
+```
+
+### xAddressToClassicAddress(xAddress: string): {classicAddress: string, tag: number | false, test: boolean}
+
+Convert an X-address to a classic address and tag. If the X-address did not have a tag, the returned object will not have a `tag` field. If the X-address is intended for use on test network(s), `test` will be `true`; if it is intended for use on the main network (mainnet), `test` will be `false`.
+
+```js
+> const api = require('ripple-address-codec')
+> rippleAddressCodec.xAddressToClassicAddress('XVLhHMPHU98es4dbozjVtdWzVrDjtV18pX8yuPT7y4xaEHi')
+{
+  classicAddress: 'rGWrZyQqhTp9Xu7G5Pkayo7bXjH4k4QYpf',
+  tag: 4294967295,
+  test: true
+}
+```
+
+### isValidXAddress(xAddress: string): boolean
+
+Returns `true` if the provided X-address is valid, or `false` otherwise.
+
+```js
+> const api = require('ripple-address-codec')
+> api.isValidXAddress('XVLhHMPHU98es4dbozjVtdWzVrDjtV18pX8yuPT7y4xaEHi')
+true
+```
+
+### Other functions
+
 ```js
 > var api = require('ripple-address-codec');
 > api.decodeSeed('sEdTM1uX8pu2do5XvTnutH6HsouMaM2')
@@ -50,3 +92,11 @@ Use `--coverage` to generate and display code coverage information:
     yarn test --coverage
 
 This tells jest to output code coverage info in the `./coverage` directory, in addition to showing it on the command line.
+
+## Acknowledgements
+
+This library references and adopts code and standards from the following sources:
+
+- [XLS-5d Standard for Tagged Addresses](https://github.com/xrp-community/standards-drafts/issues/6) by @nbougalis
+- [XRPL Tagged Address Codec](https://github.com/xrp-community/xrpl-tagged-address-codec) by @WietseWind
+- [X-Address transaction functions](https://github.com/codetsunami/xrpl-tools/tree/master/xaddress-functions) by @codetsunami
diff --git a/packages/ripple-address-codec/package.json b/packages/ripple-address-codec/package.json
index 0515a06f..29bae2e2 100644
--- a/packages/ripple-address-codec/package.json
+++ b/packages/ripple-address-codec/package.json
@@ -1,6 +1,6 @@
 {
   "name": "ripple-address-codec",
-  "version": "3.0.4",
+  "version": "4.0.0-b5",
   "description": "encodes/decodes base58 encoded XRP Ledger identifiers",
   "files": [
     "dist/*",
@@ -19,6 +19,7 @@
     "url": "git://github.com/ripple/ripple-address-codec.git"
   },
   "prepublish": "tsc",
+  "prepublishOnly": "tslint -p ./ && jest",
   "scripts": {
     "compile": "tsc",
     "test": "jest",
diff --git a/packages/ripple-address-codec/src/index.test.ts b/packages/ripple-address-codec/src/index.test.ts
new file mode 100644
index 00000000..6bd162bd
--- /dev/null
+++ b/packages/ripple-address-codec/src/index.test.ts
@@ -0,0 +1,229 @@
+import {
+  classicAddressToXAddress,
+  xAddressToClassicAddress,
+  isValidXAddress,
+  encodeXAddress
+} from './index'
+
+const testCases = [
+  [
+    'r9cZA1mLK5R5Am25ArfXFmqgNwjZgnfk59',
+    false,
+    'X7AcgcsBL6XDcUb289X4mJ8djcdyKaB5hJDWMArnXr61cqZ',
+    'T719a5UwUCnEs54UsxG9CJYYDhwmFCqkr7wxCcNcfZ6p5GZ'
+  ],
+  [
+    'r9cZA1mLK5R5Am25ArfXFmqgNwjZgnfk59',
+    1,
+    'X7AcgcsBL6XDcUb289X4mJ8djcdyKaGZMhc9YTE92ehJ2Fu',
+    'T719a5UwUCnEs54UsxG9CJYYDhwmFCvbJNZbi37gBGkRkbE'
+  ],
+  [
+    'r9cZA1mLK5R5Am25ArfXFmqgNwjZgnfk59',
+    11747,
+    'X7AcgcsBL6XDcUb289X4mJ8djcdyKaLFuhLRuNXPrDeJd9A',
+    'T719a5UwUCnEs54UsxG9CJYYDhwmFCziiNHtUukubF2Mg6t'
+  ],
+  [
+    'rLczgQHxPhWtjkaQqn3Q6UM8AbRbbRvs5K',
+    false,
+    'XVZVpQj8YSVpNyiwXYSqvQoQqgBttTxAZwMcuJd4xteQHyt',
+    'TVVrSWtmQQssgVcmoMBcFQZKKf56QscyWLKnUyiuZW8ALU4'
+  ],
+  [
+    'rpZc4mVfWUif9CRoHRKKcmhu1nx2xktxBo',
+    false,
+    'X7YenJqxv3L66CwhBSfd3N8RzGXxYqPopMGMsCcpho79rex',
+    'T77wVQzA8ntj9wvCTNiQpNYLT5hmhRsFyXDoMLqYC4BzQtV'
+  ],
+  [
+    'rsA2LpzuawewSBQXkiju3YQTMzW13pAAdW',
+    23480,
+    'X7d3eHCXzwBeWrZec1yT24iZerQjYL8m8zCJ16ACxu1BrBY',
+    'T7YChPFWifjCAXLEtg5N74c7fSAYsvSokwcmBPBUZWhxH5P'
+  ],
+  [
+    'rsA2LpzuawewSBQXkiju3YQTMzW13pAAdW',
+    11747,
+    'X7d3eHCXzwBeWrZec1yT24iZerQjYLo2CJf8oVC5CMWey5m',
+    'T7YChPFWifjCAXLEtg5N74c7fSAYsvTcc7nEfwuEEvn5Q4w'
+  ],
+  [
+    'rGWrZyQqhTp9Xu7G5Pkayo7bXjH4k4QYpf',
+    false,
+    'XVLhHMPHU98es4dbozjVtdWzVrDjtV5fdx1mHp98tDMoQXb',
+    'TVE26TYGhfLC7tQDno7G8dGtxSkYQn49b3qD26PK7FcGSKE'
+  ],
+  [
+    'rGWrZyQqhTp9Xu7G5Pkayo7bXjH4k4QYpf',
+    0,
+    'XVLhHMPHU98es4dbozjVtdWzVrDjtV8AqEL4xcZj5whKbmc',
+    'TVE26TYGhfLC7tQDno7G8dGtxSkYQnSy8RHqGHoGJ59spi2'
+  ],
+  [
+    'rGWrZyQqhTp9Xu7G5Pkayo7bXjH4k4QYpf',
+    1,
+    'XVLhHMPHU98es4dbozjVtdWzVrDjtV8xvjGQTYPiAx6gwDC',
+    'TVE26TYGhfLC7tQDno7G8dGtxSkYQnSz1uDimDdPYXzSpyw'
+  ],
+  [
+    'rGWrZyQqhTp9Xu7G5Pkayo7bXjH4k4QYpf',
+    2,
+    'XVLhHMPHU98es4dbozjVtdWzVrDjtV8zpDURx7DzBCkrQE7',
+    'TVE26TYGhfLC7tQDno7G8dGtxSkYQnTryP9tG9TW8GeMBmd'
+  ],
+  [
+    'rGWrZyQqhTp9Xu7G5Pkayo7bXjH4k4QYpf',
+    32,
+    'XVLhHMPHU98es4dbozjVtdWzVrDjtVoYiC9UvKfjKar4LJe',
+    'TVE26TYGhfLC7tQDno7G8dGtxSkYQnT2oqaCDzMEuCDAj1j'
+  ],
+  [
+    'rGWrZyQqhTp9Xu7G5Pkayo7bXjH4k4QYpf',
+    276,
+    'XVLhHMPHU98es4dbozjVtdWzVrDjtVoKj3MnFGMXEFMnvJV',
+    'TVE26TYGhfLC7tQDno7G8dGtxSkYQnTMgJJYfAbsiPsc6Zg'
+  ],
+  [
+    'rGWrZyQqhTp9Xu7G5Pkayo7bXjH4k4QYpf',
+    65591,
+    'XVLhHMPHU98es4dbozjVtdWzVrDjtVozpjdhPQVdt3ghaWw',
+    'TVE26TYGhfLC7tQDno7G8dGtxSkYQn7ryu2W6njw7mT1jmS'
+  ],
+  [
+    'rGWrZyQqhTp9Xu7G5Pkayo7bXjH4k4QYpf',
+    16781933,
+    'XVLhHMPHU98es4dbozjVtdWzVrDjtVqrDUk2vDpkTjPsY73',
+    'TVE26TYGhfLC7tQDno7G8dGtxSkYQnVsw45sDtGHhLi27Qa'
+  ],
+  [
+    'rGWrZyQqhTp9Xu7G5Pkayo7bXjH4k4QYpf',
+    4294967294,
+    'XVLhHMPHU98es4dbozjVtdWzVrDjtV1kAsixQTdMjbWi39u',
+    'TVE26TYGhfLC7tQDno7G8dGtxSkYQnX8tDFQ53itLNqs6vU'
+  ],
+  [
+    'rGWrZyQqhTp9Xu7G5Pkayo7bXjH4k4QYpf',
+    4294967295,
+    'XVLhHMPHU98es4dbozjVtdWzVrDjtV18pX8yuPT7y4xaEHi',
+    'TVE26TYGhfLC7tQDno7G8dGtxSkYQnXoy6kSDh6rZzApc69'
+  ],
+  [
+    'rPEPPER7kfTD9w2To4CQk6UCfuHM9c6GDY',
+    false,
+    'XV5sbjUmgPpvXv4ixFWZ5ptAYZ6PD2gYsjNFQLKYW33DzBm',
+    'TVd2rqMkYL2AyS97NdELcpeiprNBjwLZzuUG5rZnaewsahi'
+  ],
+  [
+    'rPEPPER7kfTD9w2To4CQk6UCfuHM9c6GDY',
+    0,
+    'XV5sbjUmgPpvXv4ixFWZ5ptAYZ6PD2m4Er6SnvjVLpMWPjR',
+    'TVd2rqMkYL2AyS97NdELcpeiprNBjwRQUBetPbyrvXSTuxU'
+  ],
+  [
+    'rPEPPER7kfTD9w2To4CQk6UCfuHM9c6GDY',
+    13371337,
+    'XV5sbjUmgPpvXv4ixFWZ5ptAYZ6PD2qwGkhgc48zzcx6Gkr',
+    'TVd2rqMkYL2AyS97NdELcpeiprNBjwVUDvp3vhpXbNhLwJi'
+  ]
+]
+
+;[false, true].forEach(isTestAddress => {
+  const MAX_32_BIT_UNSIGNED_INT = 4294967295
+  const network = isTestAddress ? ' (test)' : ' (main)'
+
+  for (const i in testCases) {
+    const testCase = testCases[i]
+    const classicAddress = testCase[0] as string
+    const tag = testCase[1] !== false ? testCase[1] as number : false
+    const xAddress = isTestAddress ? testCase[3] as string : testCase[2] as string
+    test(`Converts ${classicAddress}${tag ? ':' + tag : ''} to ${xAddress}${network}`, () => {
+      expect(classicAddressToXAddress(classicAddress, tag, isTestAddress)).toBe(xAddress)
+      const myClassicAddress = xAddressToClassicAddress(xAddress)
+      expect(myClassicAddress).toEqual({
+        classicAddress,
+        tag,
+        test: isTestAddress
+      })
+      expect(isValidXAddress(xAddress)).toBe(true)
+    })
+  }
+
+  {
+    const classicAddress = 'rGWrZyQqhTp9Xu7G5Pkayo7bXjH4k4QYpf'
+    const tag = MAX_32_BIT_UNSIGNED_INT + 1
+
+    test(`Converting ${classicAddress}:${tag}${network} throws`, () => {
+      expect(() => {
+        classicAddressToXAddress(classicAddress, tag, isTestAddress)
+      }).toThrowError(new Error('Invalid tag'))
+    })
+  }
+
+  {
+    const classicAddress = 'r'
+    test(`Invalid classic address: Converting ${classicAddress}${network} throws`, () => {
+      expect(() => {
+        classicAddressToXAddress(classicAddress, false, isTestAddress)
+      }).toThrowError(new Error('invalid_input_size: decoded data must have length >= 5'))
+    })
+  }
+
+  {
+    const highAndLowAccounts = [
+      Buffer.from('00'.repeat(20), 'hex'),
+      Buffer.from('00'.repeat(19) + '01', 'hex'),
+      Buffer.from('01'.repeat(20), 'hex'),
+      Buffer.from('FF'.repeat(20), 'hex')
+    ]
+
+    highAndLowAccounts.forEach(accountId => {
+      [false, 0, 1, MAX_32_BIT_UNSIGNED_INT].forEach(t => {
+        const tag = (t as number | false)
+        const xAddress = encodeXAddress(accountId, tag, isTestAddress)
+        test(`Encoding ${accountId.toString('hex')}${tag ? ':' + tag : ''} to ${xAddress} has expected length`, () => {
+          expect(xAddress.length).toBe(47)
+        })
+      })
+    })
+  }
+})
+
+{
+  const xAddress = 'XVLhHMPHU98es4dbozjVtdWzVrDjtV5fdx1mHp98tDMoQXa'
+  test(`Invalid X-address (bad checksum): Converting ${xAddress} throws`, () => {
+    expect(() => {
+      xAddressToClassicAddress(xAddress)
+    }).toThrowError(new Error('checksum_invalid'))
+  })
+}
+
+{
+  const xAddress = 'dGzKGt8CVpWoa8aWL1k18tAdy9Won3PxynvbbpkAqp3V47g'
+  test(`Invalid X-address (bad prefix): Converting ${xAddress} throws`, () => {
+    expect(() => {
+      xAddressToClassicAddress(xAddress)
+    }).toThrowError(new Error('Invalid X-address: bad prefix'))
+  })
+}
+
+test(`Invalid X-address (64-bit tag) throws`, () => {
+  expect(() => {
+    // Encoded from:
+    // {
+    //   classicAddress: 'rGWrZyQqhTp9Xu7G5Pkayo7bXjH4k4QYpf',
+    //   tag: MAX_32_BIT_UNSIGNED_INT + 1
+    // }
+    xAddressToClassicAddress('XVLhHMPHU98es4dbozjVtdWzVrDjtV18pX8zeUygYrCgrPh')
+  }).toThrowError('Unsupported X-address')
+})
+
+test(`Invalid Account ID throws`, () => {
+  expect(() => {
+    encodeXAddress(Buffer.from('00'.repeat(19), 'hex'), false, false)
+  }).toThrowError('Account ID must be 20 bytes')
+})
+
+test(`isValidXAddress returns false for invalid X-address`, () => {
+  expect(isValidXAddress('XVLhHMPHU98es4dbozjVtdWzVrDjtV18pX8zeUygYrCgrPh')).toBe(false)
+})
diff --git a/packages/ripple-address-codec/src/index.ts b/packages/ripple-address-codec/src/index.ts
index 30f76518..39fc8619 100644
--- a/packages/ripple-address-codec/src/index.ts
+++ b/packages/ripple-address-codec/src/index.ts
@@ -1 +1,132 @@
-export * from './xrp-codec'
+import {
+  codec,
+  encodeSeed,
+  decodeSeed,
+  encodeAccountID,
+  decodeAccountID,
+  encodeNodePublic,
+  decodeNodePublic,
+  isValidClassicAddress
+} from './xrp-codec'
+import * as assert from 'assert'
+
+const PREFIX_BYTES = {
+  MAIN: Buffer.from([0x05, 0x44]), // 5, 68
+  TEST: Buffer.from([0x04, 0x93]) // 4, 147
+}
+
+function classicAddressToXAddress(classicAddress: string, tag: number | false, test: boolean): string {
+  const accountId = decodeAccountID(classicAddress)
+  return encodeXAddress(accountId, tag, test)
+}
+
+function encodeXAddress(accountId: Buffer, tag: number | false, test: boolean): string {
+  if (accountId.length !== 20) {
+    // RIPEMD160 is 160 bits = 20 bytes
+    throw new Error('Account ID must be 20 bytes')
+  }
+  const MAX_32_BIT_UNSIGNED_INT = 4294967295
+  const flag = tag === false ? 0 : tag <= MAX_32_BIT_UNSIGNED_INT ? 1 : 2
+  if (flag === 2) {
+    throw new Error('Invalid tag')
+  }
+  if (tag === false) {
+    tag = 0
+  }
+  const bytes = Buffer.concat(
+    [
+      test ? PREFIX_BYTES.TEST : PREFIX_BYTES.MAIN,
+      accountId,
+      Buffer.from(
+        [
+          flag, // 0x00 if no tag, 0x01 if 32-bit tag
+          tag & 0xff, // first byte
+          (tag >> 8) & 0xff, // second byte
+          (tag >> 16) & 0xff, // third byte
+          (tag >> 24) & 0xff, // fourth byte
+          0, 0, 0, 0 // four zero bytes (reserved for 64-bit tags)
+        ]
+      )
+    ]
+  )
+  const xAddress = codec.encodeChecked(bytes)
+  return xAddress
+}
+
+function xAddressToClassicAddress(xAddress: string): {classicAddress: string, tag: number | false, test: boolean} {
+  const {
+    accountId,
+    tag,
+    test
+  } = decodeXAddress(xAddress)
+  const classicAddress = encodeAccountID(accountId)
+  return {
+    classicAddress,
+    tag,
+    test
+  }
+}
+
+function decodeXAddress(xAddress: string): {accountId: Buffer, tag: number | false, test: boolean} {
+  const decoded = codec.decodeChecked(xAddress)
+  const test = isBufferForTestAddress(decoded)
+  const accountId = decoded.slice(2, 22)
+  const tag = tagFromBuffer(decoded)
+  return {
+    accountId,
+    tag,
+    test
+  }
+}
+
+function isBufferForTestAddress(buf: Buffer): boolean {
+  const decodedPrefix = buf.slice(0, 2)
+  if (PREFIX_BYTES.MAIN.equals(decodedPrefix)) {
+    return false
+  } else if (PREFIX_BYTES.TEST.equals(decodedPrefix)) {
+    return true
+  } else {
+    throw new Error('Invalid X-address: bad prefix')
+  }
+}
+
+function tagFromBuffer(buf: Buffer): number | false {
+  const flag = buf[22]
+  if (flag >= 2) {
+    // No support for 64-bit tags at this time
+    throw new Error('Unsupported X-address')
+  }
+  if (flag === 1) {
+    // Little-endian to big-endian
+    return buf[23] + buf[24] * 0x100 + buf[25] * 0x10000 + buf[26] * 0x1000000
+  }
+  assert.strictEqual(flag, 0, 'flag must be zero to indicate no tag')
+  assert.ok(Buffer.from('0000000000000000', 'hex').equals(buf.slice(23, 23 + 8)),
+    'remaining bytes must be zero')
+  return false
+}
+
+function isValidXAddress(xAddress: string): boolean {
+  try {
+    decodeXAddress(xAddress)
+  } catch (e) {
+    return false
+  }
+  return true
+}
+
+export {
+  codec, // Codec with XRP alphabet
+  encodeSeed, // Encode entropy as a "seed"
+  decodeSeed, // Decode a seed into an object with its version, type, and bytes
+  encodeAccountID, // Encode bytes as a classic address (r...)
+  decodeAccountID, // Decode a classic address to its raw bytes
+  encodeNodePublic, // Encode bytes to XRP Ledger node public key format
+  decodeNodePublic, // Decode an XRP Ledger node public key into its raw bytes
+  isValidClassicAddress, // Check whether a classic address (r...) is valid
+  classicAddressToXAddress, // Derive X-address from classic address, tag, and network ID
+  encodeXAddress, // Encode account ID, tag, and network ID to X-address
+  xAddressToClassicAddress, // Decode X-address to account ID, tag, and network ID
+  decodeXAddress, // Convert X-address to classic address, tag, and network ID
+  isValidXAddress, // Check whether an X-address (X...) is valid
+}
diff --git a/packages/ripple-address-codec/src/xrp-codec.test.ts b/packages/ripple-address-codec/src/xrp-codec.test.ts
index 123434b6..0f6092e8 100644
--- a/packages/ripple-address-codec/src/xrp-codec.test.ts
+++ b/packages/ripple-address-codec/src/xrp-codec.test.ts
@@ -53,20 +53,20 @@ test('can pass a type as second arg to encodeSeed', function() {
   expect(api.encodeSeed(decoded.bytes, type)).toBe(edSeed)
 })
 
-test('isValidAddress - secp256k1 address valid', function() {
-  expect(api.isValidAddress('rU6K7V3Po4snVhBBaU29sesqs2qTQJWDw1')).toBe(true)
+test('isValidClassicAddress - secp256k1 address valid', function() {
+  expect(api.isValidClassicAddress('rU6K7V3Po4snVhBBaU29sesqs2qTQJWDw1')).toBe(true)
 })
 
-test('isValidAddress - ed25519 address valid', function() {
-  expect(api.isValidAddress('rLUEXYuLiQptky37CqLcm9USQpPiz5rkpD')).toBe(true)
+test('isValidClassicAddress - ed25519 address valid', function() {
+  expect(api.isValidClassicAddress('rLUEXYuLiQptky37CqLcm9USQpPiz5rkpD')).toBe(true)
 })
 
-test('isValidAddress - invalid', function() {
-  expect(api.isValidAddress('rU6K7V3Po4snVhBBaU29sesqs2qTQJWDw2')).toBe(false)
+test('isValidClassicAddress - invalid', function() {
+  expect(api.isValidClassicAddress('rU6K7V3Po4snVhBBaU29sesqs2qTQJWDw2')).toBe(false)
 })
 
-test('isValidAddress - empty', function() {
-  expect(api.isValidAddress('')).toBe(false)
+test('isValidClassicAddress - empty', function() {
+  expect(api.isValidClassicAddress('')).toBe(false)
 })
 
 describe('encodeSeed', function() {
diff --git a/packages/ripple-address-codec/src/xrp-codec.ts b/packages/ripple-address-codec/src/xrp-codec.ts
index 65eaf739..e010e78c 100644
--- a/packages/ripple-address-codec/src/xrp-codec.ts
+++ b/packages/ripple-address-codec/src/xrp-codec.ts
@@ -30,24 +30,24 @@ class Codec {
   encode(bytes: Buffer, opts: {
     versions: number[],
     expectedLength: number
-  }) {
+  }): string {
     const versions = opts.versions
     return this.encodeVersioned(bytes, versions, opts.expectedLength)
   }
 
-  encodeVersioned(bytes: Buffer, versions: number[], expectedLength: number) {
+  encodeVersioned(bytes: Buffer, versions: number[], expectedLength: number): string {
     if (expectedLength && bytes.length !== expectedLength) {
       throw new Error('unexpected_payload_length: bytes.length does not match expectedLength')
     }
     return this.encodeChecked(Buffer.from(concatArgs(versions, bytes)))
   }
 
-  encodeChecked(buffer: Buffer) {
+  encodeChecked(buffer: Buffer): string {
     const check = this.sha256(this.sha256(buffer)).slice(0, 4)
     return this.encodeRaw(Buffer.from(concatArgs(buffer, check)))
   }
 
-  encodeRaw(bytes: Buffer) {
+  encodeRaw(bytes: Buffer): string {
     return this.codec.encode(bytes)
   }
 
@@ -93,7 +93,7 @@ class Codec {
     throw new Error('version_invalid: version bytes do not match any of the provided version(s)')
   }
 
-  decodeChecked(base58string: string) {
+  decodeChecked(base58string: string): Buffer {
     const buffer = this.decodeRaw(base58string)
     if (buffer.length < 5) {
       throw new Error('invalid_input_size: decoded data must have length >= 5')
@@ -104,11 +104,11 @@ class Codec {
     return buffer.slice(0, -4)
   }
 
-  decodeRaw(base58string: string) {
+  decodeRaw(base58string: string): Buffer {
     return this.codec.decode(base58string)
   }
 
-  verifyCheckSum(bytes: Buffer) {
+  verifyCheckSum(bytes: Buffer): boolean {
     const computed = this.sha256(this.sha256(bytes.slice(0, -4))).slice(0, 4)
     const checksum = bytes.slice(-4)
     return seqEqual(computed, checksum)
@@ -119,6 +119,7 @@ class Codec {
  * XRP codec
  */
 
+// Pure JavaScript hash functions in the browser, native hash functions in Node.js
 const createHash = require('create-hash')
 
 const NODE_PUBLIC = 28
@@ -190,8 +191,7 @@ export function encodeNodePublic(bytes: Buffer): string {
   return codecWithXrpAlphabet.encode(bytes, opts)
 }
 
-// Address === AccountID
-export function isValidAddress(address: string): boolean {
+export function isValidClassicAddress(address: string): boolean {
   try {
     decodeAccountID(address)
   } catch (e) {
diff --git a/packages/ripple-address-codec/yarn.lock b/packages/ripple-address-codec/yarn.lock
index ebfb93a8..cb87413c 100644
--- a/packages/ripple-address-codec/yarn.lock
+++ b/packages/ripple-address-codec/yarn.lock
@@ -10,16 +10,16 @@
     "@babel/highlight" "^7.0.0"
 
 "@babel/core@^7.1.0":
-  version "7.6.0"
-  resolved "https://registry.yarnpkg.com/@babel/core/-/core-7.6.0.tgz#9b00f73554edd67bebc86df8303ef678be3d7b48"
-  integrity sha512-FuRhDRtsd6IptKpHXAa+4WPZYY2ZzgowkbLBecEDDSje1X/apG7jQM33or3NdOmjXBKWGOg4JmSiRfUfuTtHXw==
+  version "7.6.2"
+  resolved "https://registry.yarnpkg.com/@babel/core/-/core-7.6.2.tgz#069a776e8d5e9eefff76236bc8845566bd31dd91"
+  integrity sha512-l8zto/fuoZIbncm+01p8zPSDZu/VuuJhAfA7d/AbzM09WR7iVhavvfNDYCNpo1VvLk6E6xgAoP9P+/EMJHuRkQ==
   dependencies:
     "@babel/code-frame" "^7.5.5"
-    "@babel/generator" "^7.6.0"
-    "@babel/helpers" "^7.6.0"
-    "@babel/parser" "^7.6.0"
+    "@babel/generator" "^7.6.2"
+    "@babel/helpers" "^7.6.2"
+    "@babel/parser" "^7.6.2"
     "@babel/template" "^7.6.0"
-    "@babel/traverse" "^7.6.0"
+    "@babel/traverse" "^7.6.2"
     "@babel/types" "^7.6.0"
     convert-source-map "^1.1.0"
     debug "^4.1.0"
@@ -29,16 +29,15 @@
     semver "^5.4.1"
     source-map "^0.5.0"
 
-"@babel/generator@^7.4.0", "@babel/generator@^7.6.0":
-  version "7.6.0"
-  resolved "https://registry.yarnpkg.com/@babel/generator/-/generator-7.6.0.tgz#e2c21efbfd3293ad819a2359b448f002bfdfda56"
-  integrity sha512-Ms8Mo7YBdMMn1BYuNtKuP/z0TgEIhbcyB8HVR6PPNYp4P61lMsABiS4A3VG1qznjXVCf3r+fVHhm4efTYVsySA==
+"@babel/generator@^7.4.0", "@babel/generator@^7.6.2":
+  version "7.6.2"
+  resolved "https://registry.yarnpkg.com/@babel/generator/-/generator-7.6.2.tgz#dac8a3c2df118334c2a29ff3446da1636a8f8c03"
+  integrity sha512-j8iHaIW4gGPnViaIHI7e9t/Hl8qLjERI6DcV9kEpAIDJsAOrcnXqRS7t+QbhL76pwbtqP+QCQLL0z1CyVmtjjQ==
   dependencies:
     "@babel/types" "^7.6.0"
     jsesc "^2.5.1"
     lodash "^4.17.13"
     source-map "^0.5.0"
-    trim-right "^1.0.1"
 
 "@babel/helper-function-name@^7.1.0":
   version "7.1.0"
@@ -68,13 +67,13 @@
   dependencies:
     "@babel/types" "^7.4.4"
 
-"@babel/helpers@^7.6.0":
-  version "7.6.0"
-  resolved "https://registry.yarnpkg.com/@babel/helpers/-/helpers-7.6.0.tgz#21961d16c6a3c3ab597325c34c465c0887d31c6e"
-  integrity sha512-W9kao7OBleOjfXtFGgArGRX6eCP0UEcA2ZWEWNkJdRZnHhW4eEbeswbG3EwaRsnQUAEGWYgMq1HsIXuNNNy2eQ==
+"@babel/helpers@^7.6.2":
+  version "7.6.2"
+  resolved "https://registry.yarnpkg.com/@babel/helpers/-/helpers-7.6.2.tgz#681ffe489ea4dcc55f23ce469e58e59c1c045153"
+  integrity sha512-3/bAUL8zZxYs1cdX2ilEE0WobqbCmKWr/889lf2SS0PpDcpEIY8pb1CCyz0pEcX3pEb+MCbks1jIokz2xLtGTA==
   dependencies:
     "@babel/template" "^7.6.0"
-    "@babel/traverse" "^7.6.0"
+    "@babel/traverse" "^7.6.2"
     "@babel/types" "^7.6.0"
 
 "@babel/highlight@^7.0.0":
@@ -86,10 +85,10 @@
     esutils "^2.0.2"
     js-tokens "^4.0.0"
 
-"@babel/parser@^7.1.0", "@babel/parser@^7.4.3", "@babel/parser@^7.6.0":
-  version "7.6.0"
-  resolved "https://registry.yarnpkg.com/@babel/parser/-/parser-7.6.0.tgz#3e05d0647432a8326cb28d0de03895ae5a57f39b"
-  integrity sha512-+o2q111WEx4srBs7L9eJmcwi655eD8sXniLqMB93TBK9GrNzGrxDWSjiqz2hLU0Ha8MTXFIP0yd9fNdP+m43ZQ==
+"@babel/parser@^7.1.0", "@babel/parser@^7.4.3", "@babel/parser@^7.6.0", "@babel/parser@^7.6.2":
+  version "7.6.2"
+  resolved "https://registry.yarnpkg.com/@babel/parser/-/parser-7.6.2.tgz#205e9c95e16ba3b8b96090677a67c9d6075b70a1"
+  integrity sha512-mdFqWrSPCmikBoaBYMuBulzTIKuXVPtEISFbRRVNwMWpCms/hmE2kRq0bblUHaNRKrjRlmVbx1sDHmjmRgD2Xg==
 
 "@babel/plugin-syntax-object-rest-spread@^7.0.0":
   version "7.2.0"
@@ -107,16 +106,16 @@
     "@babel/parser" "^7.6.0"
     "@babel/types" "^7.6.0"
 
-"@babel/traverse@^7.1.0", "@babel/traverse@^7.4.3", "@babel/traverse@^7.6.0":
-  version "7.6.0"
-  resolved "https://registry.yarnpkg.com/@babel/traverse/-/traverse-7.6.0.tgz#389391d510f79be7ce2ddd6717be66d3fed4b516"
-  integrity sha512-93t52SaOBgml/xY74lsmt7xOR4ufYvhb5c5qiM6lu4J/dWGMAfAh6eKw4PjLes6DI6nQgearoxnFJk60YchpvQ==
+"@babel/traverse@^7.1.0", "@babel/traverse@^7.4.3", "@babel/traverse@^7.6.2":
+  version "7.6.2"
+  resolved "https://registry.yarnpkg.com/@babel/traverse/-/traverse-7.6.2.tgz#b0e2bfd401d339ce0e6c05690206d1e11502ce2c"
+  integrity sha512-8fRE76xNwNttVEF2TwxJDGBLWthUkHWSldmfuBzVRmEDWOtu4XdINTgN7TDWzuLg4bbeIMLvfMFD9we5YcWkRQ==
   dependencies:
     "@babel/code-frame" "^7.5.5"
-    "@babel/generator" "^7.6.0"
+    "@babel/generator" "^7.6.2"
     "@babel/helper-function-name" "^7.1.0"
     "@babel/helper-split-export-declaration" "^7.4.4"
-    "@babel/parser" "^7.6.0"
+    "@babel/parser" "^7.6.2"
     "@babel/types" "^7.6.0"
     debug "^4.1.0"
     globals "^11.1.0"
@@ -299,9 +298,9 @@
     "@types/babel__traverse" "*"
 
 "@types/babel__generator@*":
-  version "7.0.2"
-  resolved "https://registry.yarnpkg.com/@types/babel__generator/-/babel__generator-7.0.2.tgz#d2112a6b21fad600d7674274293c85dce0cb47fc"
-  integrity sha512-NHcOfab3Zw4q5sEE2COkpfXjoE7o+PmqD9DQW4koUT3roNxwziUdXGnRndMat/LJNUtePwn1TlP4do3uoe3KZQ==
+  version "7.6.0"
+  resolved "https://registry.yarnpkg.com/@types/babel__generator/-/babel__generator-7.6.0.tgz#f1ec1c104d1bb463556ecb724018ab788d0c172a"
+  integrity sha512-c1mZUu4up5cp9KROs/QAw0gTeHrw/x7m52LcnvMxxOZ03DmLwPV0MlGmlgzV3cnSdjhJOZsj7E7FHeioai+egw==
   dependencies:
     "@babel/types" "^7.0.0"
 
@@ -360,14 +359,14 @@
     "@types/jest-diff" "*"
 
 "@types/node@*":
-  version "12.7.5"
-  resolved "https://registry.yarnpkg.com/@types/node/-/node-12.7.5.tgz#e19436e7f8e9b4601005d73673b6dc4784ffcc2f"
-  integrity sha512-9fq4jZVhPNW8r+UYKnxF1e2HkDWOWKM5bC2/7c9wPV835I0aOrVbS/Hw/pWPk2uKrNXQqg9Z959Kz+IYDd5p3w==
+  version "12.7.7"
+  resolved "https://registry.yarnpkg.com/@types/node/-/node-12.7.7.tgz#f9bd8c00fa9e1a8129af910fc829f6139c397d6c"
+  integrity sha512-4jUncNe2tj1nmrO/34PsRpZqYVnRV1svbU78cKhuQKkMntKB/AmdLyGgswcZKjFHEHGpiY8pVD8CuVI55nP54w==
 
 "@types/node@^10.12.0":
-  version "10.12.0"
-  resolved "https://registry.yarnpkg.com/@types/node/-/node-10.12.0.tgz#ea6dcbddbc5b584c83f06c60e82736d8fbb0c235"
-  integrity sha512-3TUHC3jsBAB7qVRGxT6lWyYo2v96BMmD2PTcl47H25Lu7UXtFH/2qqmKiVrnel6Ne//0TFYf6uvNX+HW2FRkLQ==
+  version "10.14.19"
+  resolved "https://registry.yarnpkg.com/@types/node/-/node-10.14.19.tgz#f52742c7834a815dedf66edfc8a51547e2a67342"
+  integrity sha512-j6Sqt38ssdMKutXBUuAcmWF8QtHW1Fwz/mz4Y+Wd9mzpBiVFirjpNQf363hG5itkG+yGaD+oiLyb50HxJ36l9Q==
 
 "@types/stack-utils@^1.0.1":
   version "1.0.1"
@@ -728,7 +727,7 @@ caseless@~0.12.0:
   resolved "https://registry.yarnpkg.com/caseless/-/caseless-0.12.0.tgz#1b681c21ff84033c826543090689420d187151dc"
   integrity sha1-G2gcIf+EAzyCZUMJBolCDRhxUdw=
 
-chalk@^2.0.0, chalk@^2.0.1, chalk@^2.4.2:
+chalk@^2.0.0, chalk@^2.0.1, chalk@^2.3.0, chalk@^2.4.2:
   version "2.4.2"
   resolved "https://registry.yarnpkg.com/chalk/-/chalk-2.4.2.tgz#cd42541677a54333cf541a49108c1432b44c9424"
   integrity sha512-Mti+f9lpJNcwF4tWV8/OrTTtF1gZi+f8FqlyAdouralcFWFQWF2+NgCHShjkCb+IFBLq9buZwE1xckQU4peSuQ==
@@ -737,15 +736,6 @@ chalk@^2.0.0, chalk@^2.0.1, chalk@^2.4.2:
     escape-string-regexp "^1.0.5"
     supports-color "^5.3.0"
 
-chalk@^2.3.0:
-  version "2.4.1"
-  resolved "https://registry.yarnpkg.com/chalk/-/chalk-2.4.1.tgz#18c49ab16a037b6eb0152cc83e3471338215b66e"
-  integrity sha512-ObN6h1v2fTJSmUXoS3nMQ92LbDK9be4TV+6G+omQlGJFdcUX5heKi1LZ1YnRMIgwTLEj3E24bT6tYni50rlCfQ==
-  dependencies:
-    ansi-styles "^3.2.1"
-    escape-string-regexp "^1.0.5"
-    supports-color "^5.3.0"
-
 chownr@^1.1.1:
   version "1.1.2"
   resolved "https://registry.yarnpkg.com/chownr/-/chownr-1.1.2.tgz#a18f1e0b269c8a6a5d3c86eb298beb14c3dd7bf6"
@@ -802,13 +792,13 @@ collection-visit@^1.0.0:
     object-visit "^1.0.0"
 
 color-convert@^1.9.0:
-  version "1.9.1"
-  resolved "https://registry.yarnpkg.com/color-convert/-/color-convert-1.9.1.tgz#c1261107aeb2f294ebffec9ed9ecad529a6097ed"
-  integrity sha512-mjGanIiwQJskCC18rPR6OmrZ6fm2Lc7PeGFYwCmy5J34wC6F1PzdGL6xeMfmgicfYcNLGuVFA3WzXtIDCQSZxQ==
+  version "1.9.3"
+  resolved "https://registry.yarnpkg.com/color-convert/-/color-convert-1.9.3.tgz#bb71850690e1f136567de629d2d5471deda4c1e8"
+  integrity sha512-QfAUtd+vFdAtFQcC8CCyYt1fYWxSqAiK2cSD6zDB8N3cpsEBAvRxp9zOGg6G/SHHJYAT88/az/IuDGALsNVbGg==
   dependencies:
-    color-name "^1.1.1"
+    color-name "1.1.3"
 
-color-name@^1.1.1:
+color-name@1.1.3:
   version "1.1.3"
   resolved "https://registry.yarnpkg.com/color-name/-/color-name-1.1.3.tgz#a7d0558bd89c42f795dd42328f740831ca53bc25"
   integrity sha1-p9BVi9icQveV3UIyj3QIMcpTvCU=
@@ -820,12 +810,7 @@ combined-stream@^1.0.6, combined-stream@~1.0.6:
   dependencies:
     delayed-stream "~1.0.0"
 
-commander@^2.12.1:
-  version "2.19.0"
-  resolved "https://registry.yarnpkg.com/commander/-/commander-2.19.0.tgz#f6198aa84e5b83c46054b94ddedbfed5ee9ff12a"
-  integrity sha512-6tvAOO+D6OENvRAh524Dh9jcfKTYDQAqvqezbCW82xj5X0pSrcpxtvRKHLG0yBY6SD7PSDrJaj+0AiOcKVd1Xg==
-
-commander@~2.20.0:
+commander@^2.12.1, commander@~2.20.0:
   version "2.20.0"
   resolved "https://registry.yarnpkg.com/commander/-/commander-2.20.0.tgz#d58bb2b5c1ee8f87b0d340027e9e94e222c5a422"
   integrity sha512-7j2y+40w61zy6YC2iRNpUe/NwhNyoXrYpHMrSunaMG64nRnaf96zO/KMQR4OyN/UnE5KLyEBnKHd4aG3rskjpQ==
@@ -1007,10 +992,10 @@ diff-sequences@^24.9.0:
   resolved "https://registry.yarnpkg.com/diff-sequences/-/diff-sequences-24.9.0.tgz#5715d6244e2aa65f48bba0bc972db0b0b11e95b5"
   integrity sha512-Dj6Wk3tWyTE+Fo1rW8v0Xhwk80um6yFYKbuAxc9c3EZxIHFDYwbi34Uk42u1CdnIiVorvt4RmlSDjIPyzGC2ew==
 
-diff@^3.2.0:
-  version "3.5.0"
-  resolved "https://registry.yarnpkg.com/diff/-/diff-3.5.0.tgz#800c0dd1e0a8bfbc95835c202ad220fe317e5a12"
-  integrity sha512-A46qtFgd+g7pDZinpnwiRJtxbC1hpgf0uzP3iG89scHk0AUC7A1TGxf5OiiOUv/JMZR8GOt8hL900hV0bOy5xA==
+diff@^4.0.1:
+  version "4.0.1"
+  resolved "https://registry.yarnpkg.com/diff/-/diff-4.0.1.tgz#0c667cb467ebbb5cea7f14f135cc2dba7780a8ff"
+  integrity sha512-s2+XdvhPCOF01LRQBC8hf4vhbVmI2CGS5aZnxLJlT5FtdhPCDFq80q++zK2KlrVorVDdL5BOGZ/VfLrVtYNF+Q==
 
 doctrine@0.7.2:
   version "0.7.2"
@@ -1041,9 +1026,9 @@ emoji-regex@^7.0.1:
   integrity sha512-CwBLREIQ7LvYFB0WyRvwhq5N5qPhc6PMjD6bYggFlI5YyDgl+0vxq5VHbMOFqLg7hfWzmu8T5Z1QofhmTIhItA==
 
 end-of-stream@^1.1.0:
-  version "1.4.1"
-  resolved "https://registry.yarnpkg.com/end-of-stream/-/end-of-stream-1.4.1.tgz#ed29634d19baba463b6ce6b80a37213eab71ec43"
-  integrity sha512-1MkrZNvWTKCaigbn+W15elq2BB/L22nqrSY5DKlo3X6+vclJm8Bb5djXJBmEX6fS3+zCh/F4VBK5Z2KxJt4s2Q==
+  version "1.4.3"
+  resolved "https://registry.yarnpkg.com/end-of-stream/-/end-of-stream-1.4.3.tgz#9db9861620e47283cd49513be9c344f339ec5153"
+  integrity sha512-cbNhPFS6MlYlWTGncSiDYbdqKhwWFy7kNeb1YSOG6K65i/wPTkLVCJQj0hXA4j0m5Da+hBWnqopEnu1FFelisQ==
   dependencies:
     once "^1.4.0"
 
@@ -1102,9 +1087,9 @@ esprima@^3.1.3:
   integrity sha1-/cpRzuYTOJXjyI1TXOSdv/YqRjM=
 
 esprima@^4.0.0:
-  version "4.0.0"
-  resolved "https://registry.yarnpkg.com/esprima/-/esprima-4.0.0.tgz#4499eddcd1110e0b218bacf2fa7f7f59f55ca804"
-  integrity sha512-oftTcaMu/EGrEIu904mWteKIv8vMuOgGYo7EhVJJN00R/EED9DCua/xxHRdYnKtcECzVg7xOWhflvJMnqcFZjw==
+  version "4.0.1"
+  resolved "https://registry.yarnpkg.com/esprima/-/esprima-4.0.1.tgz#13b04cdb3e6c5d19df91ab6987a8695619b0aa71"
+  integrity sha512-eGuFFw7Upda+g4p+QHvnW0RyTX/SVeJBDM/gCtMARO0cLuT2HcEKnTPvhjV6aGeqrCB/sbNop0Kszm0jsaWU4A==
 
 estraverse@^4.2.0:
   version "4.3.0"
@@ -1117,9 +1102,9 @@ esutils@^1.1.6:
   integrity sha1-wBzKqa5LiXxtDD4hCuUvPHqEQ3U=
 
 esutils@^2.0.2:
-  version "2.0.2"
-  resolved "https://registry.yarnpkg.com/esutils/-/esutils-2.0.2.tgz#0abf4f1caa5bcb1f7a9d8acc6dea4faaa04bac9b"
-  integrity sha1-Cr9PHKpbyx96nYrMbepPqqBLrJs=
+  version "2.0.3"
+  resolved "https://registry.yarnpkg.com/esutils/-/esutils-2.0.3.tgz#74d2eb4de0b8da1293711910d50775b9b710ef64"
+  integrity sha512-kVscqXk4OCp68SZ0dkgEKVi6/8ij300KBWTJq32P/dYeWTSwK41WyTxalN1eRmA5Z9UU/LX9D7FWSmV9SAYx6g==
 
 exec-sh@^0.3.2:
   version "0.3.2"
@@ -1341,19 +1326,7 @@ getpass@^0.1.1:
   dependencies:
     assert-plus "^1.0.0"
 
-glob@^7.1.1:
-  version "7.1.3"
-  resolved "https://registry.yarnpkg.com/glob/-/glob-7.1.3.tgz#3960832d3f1574108342dafd3a67b332c0969df1"
-  integrity sha512-vcfuiIxogLV4DlGBHIUOwI0IbrJ8HWPc4MU7HzviGeNho/UJDfi6B5p3sHeWIQ0KGIU0Jpxi5ZHxemQfLkkAwQ==
-  dependencies:
-    fs.realpath "^1.0.0"
-    inflight "^1.0.4"
-    inherits "2"
-    minimatch "^3.0.4"
-    once "^1.3.0"
-    path-is-absolute "^1.0.0"
-
-glob@^7.1.2, glob@^7.1.3:
+glob@^7.1.1, glob@^7.1.2, glob@^7.1.3:
   version "7.1.4"
   resolved "https://registry.yarnpkg.com/glob/-/glob-7.1.4.tgz#aa608a2f6c577ad357e1ae5a5c26d9a8d1969255"
   integrity sha512-hkLPepehmnKk41pUGm3sYxoFs/umurYfYJCerbXEyFIWcAzvpipAgVkBqqT9RBKMGjnq6kMuyYwha6csxbiM1A==
@@ -1381,9 +1354,9 @@ growly@^1.3.0:
   integrity sha1-8QdIy+dq+WS3yWyTxrzCivEgwIE=
 
 handlebars@^4.1.2:
-  version "4.2.0"
-  resolved "https://registry.yarnpkg.com/handlebars/-/handlebars-4.2.0.tgz#57ce8d2175b9bbb3d8b3cf3e4217b1aec8ddcb2e"
-  integrity sha512-Kb4xn5Qh1cxAKvQnzNWZ512DhABzyFNmsaJf3OAkWNa4NkaqWcNI8Tao8Tasi0/F4JD9oyG0YxuFyvyR57d+Gw==
+  version "4.3.1"
+  resolved "https://registry.yarnpkg.com/handlebars/-/handlebars-4.3.1.tgz#6febc1890851f62a8932d495cc88d29390fa850d"
+  integrity sha512-c0HoNHzDiHpBt4Kqe99N8tdLPKAnGCQ73gYMPWtAYM4PwGnf7xl8PBUHJqh9ijlzt2uQKaSRxbXRt+rZ7M2/kA==
   dependencies:
     neo-async "^2.6.0"
     optimist "^0.6.1"
@@ -1521,12 +1494,7 @@ inflight@^1.0.4:
     once "^1.3.0"
     wrappy "1"
 
-inherits@2, inherits@^2.0.1:
-  version "2.0.3"
-  resolved "https://registry.yarnpkg.com/inherits/-/inherits-2.0.3.tgz#633c2c83e3da42a502f52466022480f4208261de"
-  integrity sha1-Yzwsg+PaQqUC9SRmAiSA9CCCYd4=
-
-inherits@~2.0.3:
+inherits@2, inherits@^2.0.1, inherits@~2.0.3:
   version "2.0.4"
   resolved "https://registry.yarnpkg.com/inherits/-/inherits-2.0.4.tgz#0fa2c64f932917c3433a0ded55363aae37416b7c"
   integrity sha512-k/vGaX4/Yla3WzyMCvTQOXYeIHvqOKtnqBduzTHpzpQZzAskKMhZ2K+EnBiSM9zGSoIFeMpXKxa4dYeZIQqewQ==
@@ -2336,12 +2304,13 @@ map-visit@^1.0.0:
     object-visit "^1.0.0"
 
 md5.js@^1.3.4:
-  version "1.3.4"
-  resolved "https://registry.yarnpkg.com/md5.js/-/md5.js-1.3.4.tgz#e9bdbde94a20a5ac18b04340fc5764d5b09d901d"
-  integrity sha1-6b296UogpawYsENA/Fdk1bCdkB0=
+  version "1.3.5"
+  resolved "https://registry.yarnpkg.com/md5.js/-/md5.js-1.3.5.tgz#b5d07b8e3216e3e27cd728d72f70d1e6a342005f"
+  integrity sha512-xitP+WxNPcTTOgnTJcrhM0xvdPepipPSf3I8EIpGKeFLjt3PlJLIDG3u8EX53ZIubkb+5U2+3rELYpEhHhzdkg==
   dependencies:
     hash-base "^3.0.0"
     inherits "^2.0.1"
+    safe-buffer "^5.1.2"
 
 merge-stream@^2.0.0:
   version "2.0.0"
@@ -2401,10 +2370,10 @@ minimist@~0.0.1:
   resolved "https://registry.yarnpkg.com/minimist/-/minimist-0.0.10.tgz#de3f98543dbf96082be48ad1a0c7cda836301dcf"
   integrity sha1-3j+YVD2/lggr5IrRoMfNqDYwHc8=
 
-minipass@^2.2.1, minipass@^2.6.0, minipass@^2.6.4:
-  version "2.6.5"
-  resolved "https://registry.yarnpkg.com/minipass/-/minipass-2.6.5.tgz#1c245f9f2897f70fd4a219066261ce6c29f80b18"
-  integrity sha512-ewSKOPFH9blOLXx0YSE+mbrNMBFPS+11a2b03QZ+P4LVrUHW/GAlqeYC7DBknDyMWkHzrzTpDhUvy7MUxqyrPA==
+minipass@^2.2.1, minipass@^2.6.0, minipass@^2.8.6:
+  version "2.8.6"
+  resolved "https://registry.yarnpkg.com/minipass/-/minipass-2.8.6.tgz#620d889ace26356391d010ecb9458749df9b6db5"
+  integrity sha512-lFG7d6g3+/UaFDCOtqPiKAC9zngWWsQZl1g5q6gaONqrjq61SX2xFqXMleQiFVyDpYwa018E9hmlAFY22PCb+A==
   dependencies:
     safe-buffer "^5.1.2"
     yallist "^3.0.0"
@@ -2754,7 +2723,7 @@ path-key@^2.0.0, path-key@^2.0.1:
   resolved "https://registry.yarnpkg.com/path-key/-/path-key-2.0.1.tgz#411cadb574c5a140d3a4b1910d40d80cc9f40b40"
   integrity sha1-QRyttXTFoUDTpLGRDUDYDMn0C0A=
 
-path-parse@^1.0.5, path-parse@^1.0.6:
+path-parse@^1.0.6:
   version "1.0.6"
   resolved "https://registry.yarnpkg.com/path-parse/-/path-parse-1.0.6.tgz#d62dbb5679405d72c4737ec58600e9ddcf06d24c"
   integrity sha512-GSmOT2EbHrINBf9SR7CDELwlJ8AENk3Qn7OikK4nFYAu3Ote2+JYNVvkpAEQm3/TLNEJFD/xZJjzyxg3KBWOzw==
@@ -3010,20 +2979,13 @@ resolve@1.1.7:
   resolved "https://registry.yarnpkg.com/resolve/-/resolve-1.1.7.tgz#203114d82ad2c5ed9e8e0411b3932875e889e97b"
   integrity sha1-IDEU2CrSxe2ejgQRs5ModeiJ6Xs=
 
-resolve@1.x, resolve@^1.10.0:
+resolve@1.x, resolve@^1.10.0, resolve@^1.3.2:
   version "1.12.0"
   resolved "https://registry.yarnpkg.com/resolve/-/resolve-1.12.0.tgz#3fc644a35c84a48554609ff26ec52b66fa577df6"
   integrity sha512-B/dOmuoAik5bKcD6s6nXDCjzUKnaDvdkRyAk6rsmsKLipWj4797iothd7jmmUhWTfinVMU+wc56rYKsit2Qy4w==
   dependencies:
     path-parse "^1.0.6"
 
-resolve@^1.3.2:
-  version "1.8.1"
-  resolved "https://registry.yarnpkg.com/resolve/-/resolve-1.8.1.tgz#82f1ec19a423ac1fbd080b0bab06ba36e84a7a26"
-  integrity sha512-AicPrAC7Qu1JxPCZ9ZgCZlY35QgFnNqc+0LtbRNxnVw4TXvjQ72wnuL9JQcEBgXkI9JM8MsT9kaQoHcpCRJOYA==
-  dependencies:
-    path-parse "^1.0.5"
-
 ret@~0.1.10:
   version "0.1.15"
   resolved "https://registry.yarnpkg.com/ret/-/ret-0.1.15.tgz#b8a4825d5bdb1fc3f6f53c2bc33f81388681c7bc"
@@ -3049,16 +3011,16 @@ rsvp@^4.8.4:
   resolved "https://registry.yarnpkg.com/rsvp/-/rsvp-4.8.5.tgz#c8f155311d167f68f21e168df71ec5b083113734"
   integrity sha512-nfMOlASu9OnRJo1mbEk2cz0D56a1MBNrJ7orjRZQG10XDyuvwksKbuXNp6qa+kbn839HwjwhBzhFmdsaEAfauA==
 
-safe-buffer@^5.0.1, safe-buffer@~5.1.0, safe-buffer@~5.1.1:
-  version "5.1.2"
-  resolved "https://registry.yarnpkg.com/safe-buffer/-/safe-buffer-5.1.2.tgz#991ec69d296e0313747d59bdfd2b745c35f8828d"
-  integrity sha512-Gd2UZBJDkXlY7GbJxfsE8/nvKkUEU1G38c1siN6QP6a9PT9MmHB8GnpscSmMJSoF8LOIrt8ud/wPtojys4G6+g==
-
-safe-buffer@^5.1.2:
+safe-buffer@^5.0.1, safe-buffer@^5.1.2:
   version "5.2.0"
   resolved "https://registry.yarnpkg.com/safe-buffer/-/safe-buffer-5.2.0.tgz#b74daec49b1148f88c64b68d49b1e815c1f2f519"
   integrity sha512-fZEwUGbVl7kouZs1jCdMLdt95hdIv0ZeHg6L7qPeciMZhZ+/gdesW4wgTARkrFWEpspjEATAzUGPG8N2jJiwbg==
 
+safe-buffer@~5.1.0, safe-buffer@~5.1.1:
+  version "5.1.2"
+  resolved "https://registry.yarnpkg.com/safe-buffer/-/safe-buffer-5.1.2.tgz#991ec69d296e0313747d59bdfd2b745c35f8828d"
+  integrity sha512-Gd2UZBJDkXlY7GbJxfsE8/nvKkUEU1G38c1siN6QP6a9PT9MmHB8GnpscSmMJSoF8LOIrt8ud/wPtojys4G6+g==
+
 safe-regex@^1.1.0:
   version "1.1.0"
   resolved "https://registry.yarnpkg.com/safe-regex/-/safe-regex-1.1.0.tgz#40a3669f3b077d1e943d44629e157dd48023bf2e"
@@ -3091,16 +3053,11 @@ sax@^1.2.4:
   resolved "https://registry.yarnpkg.com/sax/-/sax-1.2.4.tgz#2816234e2378bddc4e5354fab5caa895df7100d9"
   integrity sha512-NqVDv9TpANUjFm0N8uM5GxL36UgKi9/atZw+x7YFnQ8ckwFGKrl4xX4yWtrey3UJm5nP1kUbnYgLopqWNSRhWw==
 
-"semver@2 || 3 || 4 || 5", semver@^5.4.1, semver@^5.5, semver@^5.5.0, semver@^5.6.0:
+"semver@2 || 3 || 4 || 5", semver@^5.3.0, semver@^5.4.1, semver@^5.5, semver@^5.5.0, semver@^5.6.0:
   version "5.7.1"
   resolved "https://registry.yarnpkg.com/semver/-/semver-5.7.1.tgz#a954f931aeba508d307bbf069eff0c01c96116f7"
   integrity sha512-sauaDf/PZdVgrLTNYHRtpXa1iRiKcaebiKQ1BJdpQlWH2lCvexQdX55snPFyK7QzpudqbCI0qXFfOasHdyNDGQ==
 
-semver@^5.3.0:
-  version "5.5.0"
-  resolved "https://registry.yarnpkg.com/semver/-/semver-5.5.0.tgz#dc4bbc7a6ca9d916dee5d43516f0092b58f7b8ab"
-  integrity sha512-4SJ3dm0WAwWy/NVeioZh5AntkdJoWKxHxcmyP622fOkgHa4z3R0TdBJICINyaSDE6uNwVc8gZr+ZinwZAH4xIA==
-
 semver@^6.0.0, semver@^6.2.0:
   version "6.3.0"
   resolved "https://registry.yarnpkg.com/semver/-/semver-6.3.0.tgz#ee0a64c8af5e8ceea67687b133761e1becbd1d3d"
@@ -3390,9 +3347,9 @@ strip-json-comments@~2.0.1:
   integrity sha1-PFMZQukIwml8DsNEhYwobHygpgo=
 
 supports-color@^5.3.0:
-  version "5.4.0"
-  resolved "https://registry.yarnpkg.com/supports-color/-/supports-color-5.4.0.tgz#1c6b337402c2137605efe19f10fec390f6faab54"
-  integrity sha512-zjaXglF5nnWpsq470jSv6P9DwPvgLkuapYmfDm3JWOm0vkNTVF2tI4UrN2r6jH1qM/uc/WtxYY1hYoA2dOKj5w==
+  version "5.5.0"
+  resolved "https://registry.yarnpkg.com/supports-color/-/supports-color-5.5.0.tgz#e2e69a44ac8772f78a1ec0b35b689df6530efc8f"
+  integrity sha512-QjVjwdXIt408MIiAqCX4oUKsgU2EqAGzs2Ppkm4aQYbjm+ZEWEcW4SfFNTr4uMNZma0ey4f5lgLrkB0aX0QMow==
   dependencies:
     has-flag "^3.0.0"
 
@@ -3409,13 +3366,13 @@ symbol-tree@^3.2.2:
   integrity sha512-9QNk5KwDF+Bvz+PyObkmSYjI5ksVUYtjW7AU22r2NKcfLJcXp96hkDWU3+XndOsUb+AQ9QhfzfCT2O+CNWT5Tw==
 
 tar@^4:
-  version "4.4.11"
-  resolved "https://registry.yarnpkg.com/tar/-/tar-4.4.11.tgz#7ac09801445a3cf74445ed27499136b5240ffb73"
-  integrity sha512-iI4zh3ktLJKaDNZKZc+fUONiQrSn9HkCFzamtb7k8FFmVilHVob7QsLX/VySAW8lAviMzMbFw4QtFb4errwgYA==
+  version "4.4.12"
+  resolved "https://registry.yarnpkg.com/tar/-/tar-4.4.12.tgz#6a1275a870a782f92828e24d28fa6aa253193af7"
+  integrity sha512-4GwpJwdSjIHlUrWd/1yJrl63UqcqjJyVglgIwn4gcG+Lrp9TXpZ1ZRrGLIRBNqLTUvz6yoPJrX4B/MISxY/Ukg==
   dependencies:
     chownr "^1.1.1"
     fs-minipass "^1.2.5"
-    minipass "^2.6.4"
+    minipass "^2.8.6"
     minizlib "^1.2.1"
     mkdirp "^0.5.0"
     safe-buffer "^5.1.2"
@@ -3494,11 +3451,6 @@ tr46@^1.0.1:
   dependencies:
     punycode "^2.1.0"
 
-trim-right@^1.0.1:
-  version "1.0.1"
-  resolved "https://registry.yarnpkg.com/trim-right/-/trim-right-1.0.1.tgz#cb2e1203067e0c8de1f614094b9fe45704ea6003"
-  integrity sha1-yy4SAwZ+DI3h9hQJS5/kVwTqYAM=
-
 ts-jest@^24.1.0:
   version "24.1.0"
   resolved "https://registry.yarnpkg.com/ts-jest/-/ts-jest-24.1.0.tgz#2eaa813271a2987b7e6c3fefbda196301c131734"
@@ -3521,9 +3473,9 @@ tslib@1.9.0:
   integrity sha512-f/qGG2tUkrISBlQZEjEqoZ3B2+npJjIf04H1wuAv9iA8i04Icp+61KRXxFdha22670NJopsZCIjhC3SnjPRKrQ==
 
 tslib@^1.8.0, tslib@^1.8.1:
-  version "1.9.3"
-  resolved "https://registry.yarnpkg.com/tslib/-/tslib-1.9.3.tgz#d7e4dd79245d85428c4d7e4822a79917954ca286"
-  integrity sha512-4krF8scpejhaOgqzBEcGM7yDIEfi0/8+8zDRZhNZZ2kjmHJ4hv3zCbQWxoJGz1iw5U0Jl0nma13xzHXcncMavQ==
+  version "1.10.0"
+  resolved "https://registry.yarnpkg.com/tslib/-/tslib-1.10.0.tgz#c3c19f95973fb0a62973fb09d90d961ee43e5c8a"
+  integrity sha512-qOebF53frne81cf0S9B41ByenJ3/IuH8yJKngAX35CmiZySA0khhkovshKK+jGCaMnVomla7gVlIcc3EvKPbTQ==
 
 tslint-eslint-rules@^5.4.0:
   version "5.4.0"
@@ -3535,15 +3487,15 @@ tslint-eslint-rules@^5.4.0:
     tsutils "^3.0.0"
 
 tslint@^5.19.0:
-  version "5.19.0"
-  resolved "https://registry.yarnpkg.com/tslint/-/tslint-5.19.0.tgz#a2cbd4a7699386da823f6b499b8394d6c47bb968"
-  integrity sha512-1LwwtBxfRJZnUvoS9c0uj8XQtAnyhWr9KlNvDIdB+oXyT+VpsOAaEhEgKi1HrZ8rq0ki/AAnbGSv4KM6/AfVZw==
+  version "5.20.0"
+  resolved "https://registry.yarnpkg.com/tslint/-/tslint-5.20.0.tgz#fac93bfa79568a5a24e7be9cdde5e02b02d00ec1"
+  integrity sha512-2vqIvkMHbnx8acMogAERQ/IuINOq6DFqgF8/VDvhEkBqQh/x6SP0Y+OHnKth9/ZcHQSroOZwUQSN18v8KKF0/g==
   dependencies:
     "@babel/code-frame" "^7.0.0"
     builtin-modules "^1.1.1"
     chalk "^2.3.0"
     commander "^2.12.1"
-    diff "^3.2.0"
+    diff "^4.0.1"
     glob "^7.1.1"
     js-yaml "^3.13.1"
     minimatch "^3.0.4"
@@ -3561,9 +3513,9 @@ tsutils@^2.29.0:
     tslib "^1.8.1"
 
 tsutils@^3.0.0:
-  version "3.2.0"
-  resolved "https://registry.yarnpkg.com/tsutils/-/tsutils-3.2.0.tgz#bb2a7e2f34331f1dbd9fbe04ac0886524ae11e36"
-  integrity sha512-CvWEadl8VwlxOq6F3hfNbGrrRVSAjN2EPCEBgcbCUVDUxmwkV5254OGKsITNxDz8IGDQPAw7YJMtBHniHu2tbA==
+  version "3.17.1"
+  resolved "https://registry.yarnpkg.com/tsutils/-/tsutils-3.17.1.tgz#ed719917f11ca0dee586272b2ac49e015a2dd759"
+  integrity sha512-kzeQ5B8H3w60nFY2g8cJIuH7JDpsALXySGtwGJ0p2LSjLgay3NdIpqq5SoOBe46bKDW2iq25irHCr8wjomUS2g==
   dependencies:
     tslib "^1.8.1"
 
@@ -3587,9 +3539,9 @@ type-check@~0.3.2:
     prelude-ls "~1.1.2"
 
 typescript@^3.1.3:
-  version "3.1.3"
-  resolved "https://registry.yarnpkg.com/typescript/-/typescript-3.1.3.tgz#01b70247a6d3c2467f70c45795ef5ea18ce191d5"
-  integrity sha512-+81MUSyX+BaSo+u2RbozuQk/UWx6hfG0a5gHu4ANEM4sU96XbuIyAB+rWBW1u70c6a5QuZfuYICn3s2UjuHUpA==
+  version "3.6.3"
+  resolved "https://registry.yarnpkg.com/typescript/-/typescript-3.6.3.tgz#fea942fabb20f7e1ca7164ff626f1a9f3f70b4da"
+  integrity sha512-N7bceJL1CtRQ2RiG0AQME13ksR7DiuQh/QehubYcghzv20tnh+MQnQIuJddTmsbqYj+dztchykemz0zFzlvdQw==
 
 uglify-js@^3.1.4:
   version "3.6.0"