diff --git a/src/api.js b/src/api.js
index e308e58c..ef0e893d 100644
--- a/src/api.js
+++ b/src/api.js
@@ -1,56 +1,50 @@
 /* @flow */
-'use strict' // eslint-disable-line strict
 
-const _ = require('lodash')
-const EventEmitter = require('events').EventEmitter
-const common = require('./common')
-const server = require('./server/server')
+import * as _ from 'lodash'
+import events from 'events'
+import {Connection, errors, validate} from './common'
+import * as server from './server/server'
 const connect = server.connect
 const disconnect = server.disconnect
 const getServerInfo = server.getServerInfo
 const getFee = server.getFee
 const isConnected = server.isConnected
 const getLedgerVersion = server.getLedgerVersion
-const getTransaction = require('./ledger/transaction')
-const getTransactions = require('./ledger/transactions')
-const getTrustlines = require('./ledger/trustlines')
-const getBalances = require('./ledger/balances')
-const getBalanceSheet = require('./ledger/balance-sheet')
-const getPaths = require('./ledger/pathfind')
-const getOrders = require('./ledger/orders')
-const getOrderbook = require('./ledger/orderbook')
-const getSettings = require('./ledger/settings')
-const getAccountInfo = require('./ledger/accountinfo')
-const getPaymentChannel = require('./ledger/payment-channel')
-const preparePayment = require('./transaction/payment')
-const prepareTrustline = require('./transaction/trustline')
-const prepareOrder = require('./transaction/order')
-const prepareOrderCancellation = require('./transaction/ordercancellation')
-const prepareEscrowCreation =
-  require('./transaction/escrow-creation')
-const prepareEscrowExecution =
-  require('./transaction/escrow-execution')
-const prepareEscrowCancellation =
-  require('./transaction/escrow-cancellation')
-const preparePaymentChannelCreate =
-  require('./transaction/payment-channel-create')
-const preparePaymentChannelFund =
-  require('./transaction/payment-channel-fund')
-const preparePaymentChannelClaim =
-  require('./transaction/payment-channel-claim')
-const prepareSettings = require('./transaction/settings')
-const sign = require('./transaction/sign')
-const combine = require('./transaction/combine')
-const submit = require('./transaction/submit')
-const errors = require('./common').errors
-const generateAddress =
-  require('./offline/generate-address').generateAddressAPI
-const computeLedgerHash = require('./offline/ledgerhash')
-const signPaymentChannelClaim =
-  require('./offline/sign-payment-channel-claim')
-const verifyPaymentChannelClaim =
-  require('./offline/verify-payment-channel-claim')
-const getLedger = require('./ledger/ledger')
+import getTransaction from './ledger/transaction'
+import getTransactions from './ledger/transactions'
+import getTrustlines from './ledger/trustlines'
+import getBalances from './ledger/balances'
+import getBalanceSheet from './ledger/balance-sheet'
+import getPaths from './ledger/pathfind'
+import getOrders from './ledger/orders'
+import getOrderbook from './ledger/orderbook'
+import getSettings from './ledger/settings'
+import getAccountInfo from './ledger/accountinfo'
+import getPaymentChannel from './ledger/payment-channel'
+import preparePayment from './transaction/payment'
+import prepareTrustline from './transaction/trustline'
+import prepareOrder from './transaction/order'
+import prepareOrderCancellation from './transaction/ordercancellation'
+import prepareEscrowCreation from './transaction/escrow-creation'
+import prepareEscrowExecution from './transaction/escrow-execution'
+import prepareEscrowCancellation from './transaction/escrow-cancellation'
+import preparePaymentChannelCreate from './transaction/payment-channel-create'
+import preparePaymentChannelFund from './transaction/payment-channel-fund'
+import preparePaymentChannelClaim from './transaction/payment-channel-claim'
+import prepareSettings from './transaction/settings'
+import sign from './transaction/sign'
+import combine from './transaction/combine'
+import submit from './transaction/submit'
+import {generateAddressAPI} from './offline/generate-address'
+import computeLedgerHash from './offline/ledgerhash'
+import signPaymentChannelClaim from './offline/sign-payment-channel-claim'
+import verifyPaymentChannelClaim from './offline/verify-payment-channel-claim'
+import getLedger from './ledger/ledger'
+
+
+import RangeSet from './common/rangeset'
+import * as ledgerUtils from './ledger/utils'
+import * as schemaValidator from './common/schema-validator'
 
 type APIOptions = {
   server?: string,
@@ -61,7 +55,7 @@ type APIOptions = {
 }
 
 // prevent access to non-validated ledger versions
-class RestrictedConnection extends common.Connection {
+class RestrictedConnection extends Connection {
   request(request, timeout) {
     const ledger_index = request.ledger_index
     if (ledger_index !== undefined && ledger_index !== 'validated') {
@@ -75,21 +69,21 @@ class RestrictedConnection extends common.Connection {
   }
 }
 
-class RippleAPI extends EventEmitter {
+class RippleAPI extends events.EventEmitter {
 
-  _feeCushion: number;
-  connection: RestrictedConnection;
+  _feeCushion: number
+  connection: RestrictedConnection
 
   // these are exposed only for use by unit tests; they are not part of the API.
   static _PRIVATE = {
-    validate: common.validate,
-    RangeSet: require('./common/rangeset').RangeSet,
-    ledgerUtils: require('./ledger/utils'),
-    schemaValidator: require('./common/schema-validator')
+    validate: validate,
+    RangeSet,
+    ledgerUtils,
+    schemaValidator
   };
 
   constructor(options: APIOptions = {}) {
-    common.validate.apiOptions(options)
+    validate.apiOptions(options)
     super()
     this._feeCushion = options.feeCushion || 1.2
     const serverURL = options.server
@@ -151,13 +145,13 @@ _.assign(RippleAPI.prototype, {
   combine,
   submit,
 
-  generateAddress,
+  generateAddress: generateAddressAPI,
   computeLedgerHash,
   signPaymentChannelClaim,
   verifyPaymentChannelClaim,
   errors
 })
 
-module.exports = {
+export {
   RippleAPI
 }
diff --git a/src/broadcast.js b/src/broadcast.js
index afd97410..bfc81f0d 100644
--- a/src/broadcast.js
+++ b/src/broadcast.js
@@ -1,6 +1,6 @@
-'use strict' // eslint-disable-line strict
-const _ = require('lodash')
-const RippleAPI = require('./api').RippleAPI
+
+import * as _ from 'lodash'
+import {RippleAPI} from './api'
 
 class RippleAPIBroadcast extends RippleAPI {
   constructor(servers, options) {
@@ -65,6 +65,6 @@ class RippleAPIBroadcast extends RippleAPI {
   }
 }
 
-module.exports = {
+export {
   RippleAPIBroadcast
 }
diff --git a/src/common/browser-hacks.js b/src/common/browser-hacks.js
index 8aa48180..27ed3cb0 100644
--- a/src/common/browser-hacks.js
+++ b/src/common/browser-hacks.js
@@ -1,10 +1,10 @@
-'use strict' // eslint-disable-line strict
+
 
 function setPrototypeOf(object, prototype) {
   // Object.setPrototypeOf not supported on Internet Explorer 9
   /* eslint-disable */
   Object.setPrototypeOf ? Object.setPrototypeOf(object, prototype) :
-    object.__proto__ = prototype;
+    object.__proto__ = prototype
   /* eslint-enable */
 }
 
@@ -15,7 +15,7 @@ function getConstructorName(object) {
     object.constructor.name
 }
 
-module.exports = {
+export {
   getConstructorName,
   setPrototypeOf
 }
diff --git a/src/common/connection.js b/src/common/connection.js
index 867667fa..871d9856 100644
--- a/src/common/connection.js
+++ b/src/common/connection.js
@@ -1,13 +1,13 @@
-'use strict' // eslint-disable-line strict
 
-const _ = require('lodash')
-const {EventEmitter} = require('events')
-const WebSocket = require('ws')
-const parseURL = require('url').parse
-const RangeSet = require('./rangeset').RangeSet
-const {RippledError, DisconnectedError, NotConnectedError,
+
+import * as _ from 'lodash'
+import events from 'events'
+import WebSocket from 'ws'
+import urlLib from 'url'
+import RangeSet from './rangeset'
+import {RippledError, DisconnectedError, NotConnectedError,
   TimeoutError, ResponseFormatError, ConnectionError,
-  RippledNotInitializedError} = require('./errors')
+  RippledNotInitializedError} from './errors'
 
 function isStreamMessageType(type) {
   return type === 'ledgerClosed' ||
@@ -15,7 +15,7 @@ function isStreamMessageType(type) {
          type === 'path_find'
 }
 
-class Connection extends EventEmitter {
+class Connection extends events.EventEmitter {
   constructor(url, options = {}) {
     super()
     this.setMaxListeners(Infinity)
@@ -226,8 +226,8 @@ class Connection extends EventEmitter {
   _createWebSocket() {
     const options = {}
     if (this._proxyURL !== undefined) {
-      const parsedURL = parseURL(this._url)
-      const parsedProxyURL = parseURL(this._proxyURL)
+      const parsedURL = urlLib.parse(this._url)
+      const parsedProxyURL = urlLib.parse(this._proxyURL)
       const proxyOverrides = _.omitBy({
         secureEndpoint: (parsedURL.protocol === 'wss:'),
         secureProxy: (parsedProxyURL.protocol === 'https:'),
@@ -446,4 +446,4 @@ class Connection extends EventEmitter {
   }
 }
 
-module.exports = Connection
+export default Connection
diff --git a/src/common/constants.js b/src/common/constants.js
index 96196787..f7776ee8 100644
--- a/src/common/constants.js
+++ b/src/common/constants.js
@@ -1,5 +1,5 @@
-'use strict' // eslint-disable-line strict
-const flagIndices = require('./txflags').txFlagIndices.AccountSet
+
+import {txFlagIndices} from './txflags'
 
 const accountRootFlags = {
   PasswordSpent: 0x00010000, // password set fee is spent
@@ -24,14 +24,14 @@ const AccountFlags = {
 }
 
 const AccountFlagIndices = {
-  requireDestinationTag: flagIndices.asfRequireDest,
-  requireAuthorization: flagIndices.asfRequireAuth,
-  disallowIncomingXRP: flagIndices.asfDisallowXRP,
-  disableMasterKey: flagIndices.asfDisableMaster,
-  enableTransactionIDTracking: flagIndices.asfAccountTxnID,
-  noFreeze: flagIndices.asfNoFreeze,
-  globalFreeze: flagIndices.asfGlobalFreeze,
-  defaultRipple: flagIndices.asfDefaultRipple
+  requireDestinationTag: txFlagIndices.AccountSet.asfRequireDest,
+  requireAuthorization: txFlagIndices.AccountSet.asfRequireAuth,
+  disallowIncomingXRP: txFlagIndices.AccountSet.asfDisallowXRP,
+  disableMasterKey: txFlagIndices.AccountSet.asfDisableMaster,
+  enableTransactionIDTracking: txFlagIndices.AccountSet.asfAccountTxnID,
+  noFreeze: txFlagIndices.AccountSet.asfNoFreeze,
+  globalFreeze: txFlagIndices.AccountSet.asfGlobalFreeze,
+  defaultRipple: txFlagIndices.AccountSet.asfDefaultRipple
 }
 
 const AccountFields = {
@@ -42,7 +42,7 @@ const AccountFields = {
   TransferRate: {name: 'transferRate', defaults: 0, shift: 9}
 }
 
-module.exports = {
+export {
   AccountFields,
   AccountFlagIndices,
   AccountFlags
diff --git a/src/common/errors.js b/src/common/errors.js
index ac4fcd90..ec393b79 100644
--- a/src/common/errors.js
+++ b/src/common/errors.js
@@ -1,6 +1,6 @@
-'use strict' // eslint-disable-line strict
-const util = require('util')
-const browserHacks = require('./browser-hacks')
+
+import util from 'util'
+import * as browserHacks from './browser-hacks'
 
 // this is needed because extending builtins doesn't work in babel 6.x
 function extendableBuiltin(cls) {
@@ -80,7 +80,7 @@ class PendingLedgerVersionError extends RippleError {
   }
 }
 
-module.exports = {
+export {
   RippleError,
   UnexpectedError,
   ConnectionError,
diff --git a/src/common/index.js b/src/common/index.js
index c79d6902..9715b1aa 100644
--- a/src/common/index.js
+++ b/src/common/index.js
@@ -1,22 +1,23 @@
-'use strict' // eslint-disable-line strict
-const utils = require('./utils')
-
-module.exports = {
-  Connection: require('./connection'),
-  constants: require('./constants'),
-  errors: require('./errors'),
-  validate: require('./validate'),
-  txFlags: require('./txflags').txFlags,
-  serverInfo: require('./serverinfo'),
-  dropsToXrp: utils.dropsToXrp,
-  xrpToDrops: utils.xrpToDrops,
-  toRippledAmount: utils.toRippledAmount,
-  generateAddress: utils.generateAddress,
-  generateAddressAPI: utils.generateAddressAPI,
-  removeUndefined: utils.removeUndefined,
-  convertKeysFromSnakeCaseToCamelCase:
-    utils.convertKeysFromSnakeCaseToCamelCase,
-  iso8601ToRippleTime: utils.iso8601ToRippleTime,
-  rippleTimeToISO8601: utils.rippleTimeToISO8601,
-  isValidSecret: utils.isValidSecret
+import * as constants from './constants'
+import * as errors from './errors'
+import * as validate from './validate'
+import * as serverInfo from './serverinfo'
+export {
+  constants,
+  errors,
+  validate,
+  serverInfo
 }
+
+export {
+  dropsToXrp,
+  xrpToDrops,
+  toRippledAmount,
+  removeUndefined,
+  convertKeysFromSnakeCaseToCamelCase,
+  iso8601ToRippleTime,
+  rippleTimeToISO8601
+} from './utils'
+export {default as Connection} from './connection'
+export {txFlags} from './txflags'
+
diff --git a/src/common/rangeset.js b/src/common/rangeset.js
index e45e3c2a..36297ec4 100644
--- a/src/common/rangeset.js
+++ b/src/common/rangeset.js
@@ -1,7 +1,7 @@
 /* @flow */
-'use strict' // eslint-disable-line strict
-const _ = require('lodash')
-const assert = require('assert')
+
+import * as _ from 'lodash'
+import assert from 'assert'
 
 function mergeIntervals(intervals: Array<[number, number]>) {
   const stack = [[-Infinity, -Infinity]]
@@ -19,7 +19,7 @@ function mergeIntervals(intervals: Array<[number, number]>) {
 
 class RangeSet {
 
-  ranges: Array<[number, number]>;
+  ranges: Array<[number, number]>
 
   constructor() {
     this.reset()
@@ -60,4 +60,4 @@ class RangeSet {
   }
 }
 
-module.exports.RangeSet = RangeSet
+export default RangeSet
diff --git a/src/common/schema-validator.js b/src/common/schema-validator.js
index 1ad314ff..ddf36b99 100644
--- a/src/common/schema-validator.js
+++ b/src/common/schema-validator.js
@@ -1,12 +1,12 @@
 // flow is disabled for this file until support for requiring json is added:
 // https://github.com/facebook/flow/issues/167
-'use strict' // eslint-disable-line strict
-const _ = require('lodash')
-const assert = require('assert')
-const Validator = require('jsonschema').Validator
-const ValidationError = require('./errors').ValidationError
-const {isValidAddress} = require('ripple-address-codec')
-const {isValidSecret} = require('./utils')
+
+import * as _ from 'lodash'
+import assert from 'assert'
+import {Validator} from 'jsonschema'
+import {ValidationError} from './errors'
+import {isValidAddress} from 'ripple-address-codec'
+import {isValidSecret} from './utils'
 
 function loadSchemas() {
   // listed explicitly for webpack (instead of scanning schemas directory)
@@ -150,7 +150,7 @@ function schemaValidate(schemaName: string, object: any): void {
   }
 }
 
-module.exports = {
+export {
   schemaValidate,
   isValidSecret
 }
diff --git a/src/common/serverinfo.js b/src/common/serverinfo.js
index 6e2fb20a..aa09e42a 100644
--- a/src/common/serverinfo.js
+++ b/src/common/serverinfo.js
@@ -1,7 +1,6 @@
-'use strict' // eslint-disable-line strict
-const _ = require('lodash')
-const {convertKeysFromSnakeCaseToCamelCase} = require('./utils')
-import type {Connection} from './connection'
+import * as _ from 'lodash'
+import {convertKeysFromSnakeCaseToCamelCase} from './utils'
+import type Connection from './connection'
 
 export type GetServerInfoResponse = {
   buildVersion: string,
@@ -73,7 +72,7 @@ function getFee(connection: Connection, cushion: number) {
     _.partial(computeFeeFromServerInfo, cushion))
 }
 
-module.exports = {
+export {
   getServerInfo,
   getFee
 }
diff --git a/src/common/txflags.js b/src/common/txflags.js
index 094e0a43..0c546264 100644
--- a/src/common/txflags.js
+++ b/src/common/txflags.js
@@ -1,4 +1,4 @@
-'use strict' // eslint-disable-line strict
+
 
 const txFlags = {
   // Universal flags can apply to any transaction type
@@ -59,7 +59,7 @@ const txFlagIndices = {
   }
 }
 
-module.exports = {
+export {
   txFlags,
   txFlagIndices
 }
diff --git a/src/common/types.js b/src/common/types.js
index b4c245b8..2dd21ce0 100644
--- a/src/common/types.js
+++ b/src/common/types.js
@@ -1,5 +1,5 @@
 /* @flow */
-'use strict' // eslint-disable-line strict
+
 
 export type RippledAmountIOU = {
   currency: string,
diff --git a/src/common/utils.js b/src/common/utils.js
index 1fa0c750..fae5cea3 100644
--- a/src/common/utils.js
+++ b/src/common/utils.js
@@ -1,10 +1,10 @@
 /* @flow */
-'use strict' // eslint-disable-line strict
-const _ = require('lodash')
-const BigNumber = require('bignumber.js')
-const {deriveKeypair} = require('ripple-keypairs')
 
-import type {Amount, RippledAmount} from './types.js'
+import * as _ from 'lodash'
+import BigNumber from 'bignumber.js'
+import {deriveKeypair} from 'ripple-keypairs'
+
+import type {Amount, RippledAmount} from './types'
 
 function isValidSecret(secret: string): boolean {
   try {
@@ -82,7 +82,7 @@ function iso8601ToRippleTime(iso8601: string): number {
   return unixToRippleTimestamp(Date.parse(iso8601))
 }
 
-module.exports = {
+export {
   dropsToXrp,
   xrpToDrops,
   toRippledAmount,
@@ -92,3 +92,4 @@ module.exports = {
   iso8601ToRippleTime,
   isValidSecret
 }
+
diff --git a/src/common/validate.js b/src/common/validate.js
index 53f6f3a6..17deb0f2 100644
--- a/src/common/validate.js
+++ b/src/common/validate.js
@@ -1,8 +1,8 @@
 /* @flow */
-'use strict' // eslint-disable-line strict
-const _ = require('lodash')
-const ValidationError = require('./errors').ValidationError
-const schemaValidate = require('./schema-validator').schemaValidate
+
+import * as _ from 'lodash'
+import {ValidationError} from './errors'
+import {schemaValidate} from './schema-validator'
 
 function error(text) {
   return new ValidationError(text)
@@ -22,46 +22,98 @@ function validateOptions(schema, instance) {
   validateLedgerRange(instance.options)
 }
 
-module.exports = {
-  getPaths: _.partial(schemaValidate, 'getPathsParameters'),
-  getTransactions: _.partial(validateOptions, 'getTransactionsParameters'),
-  getSettings: _.partial(validateOptions, 'getSettingsParameters'),
-  getAccountInfo: _.partial(validateOptions, 'getAccountInfoParameters'),
-  getTrustlines: _.partial(validateOptions, 'getTrustlinesParameters'),
-  getBalances: _.partial(validateOptions, 'getBalancesParameters'),
-  getBalanceSheet: _.partial(validateOptions, 'getBalanceSheetParameters'),
-  getOrders: _.partial(validateOptions, 'getOrdersParameters'),
-  getOrderbook: _.partial(validateOptions, 'getOrderbookParameters'),
-  getTransaction: _.partial(validateOptions, 'getTransactionParameters'),
-  getPaymentChannel: _.partial(validateOptions, 'getPaymentChannelParameters'),
-  getLedger: _.partial(validateOptions, 'getLedgerParameters'),
-  preparePayment: _.partial(schemaValidate, 'preparePaymentParameters'),
-  prepareOrder: _.partial(schemaValidate, 'prepareOrderParameters'),
-  prepareOrderCancellation:
-    _.partial(schemaValidate, 'prepareOrderCancellationParameters'),
-  prepareTrustline: _.partial(schemaValidate, 'prepareTrustlineParameters'),
-  prepareSettings: _.partial(schemaValidate, 'prepareSettingsParameters'),
-  prepareEscrowCreation: _.partial(schemaValidate,
-    'prepareEscrowCreationParameters'),
-  prepareEscrowCancellation: _.partial(schemaValidate,
-    'prepareEscrowCancellationParameters'),
-  prepareEscrowExecution: _.partial(schemaValidate,
-    'prepareEscrowExecutionParameters'),
-  preparePaymentChannelCreate: _.partial(schemaValidate,
-    'preparePaymentChannelCreateParameters'),
-  preparePaymentChannelFund: _.partial(schemaValidate,
-    'preparePaymentChannelFundParameters'),
-  preparePaymentChannelClaim: _.partial(schemaValidate,
-    'preparePaymentChannelClaimParameters'),
-  sign: _.partial(schemaValidate, 'signParameters'),
-  combine: _.partial(schemaValidate, 'combineParameters'),
-  submit: _.partial(schemaValidate, 'submitParameters'),
-  computeLedgerHash: _.partial(schemaValidate, 'computeLedgerHashParameters'),
-  generateAddress: _.partial(schemaValidate, 'generateAddressParameters'),
-  signPaymentChannelClaim: _.partial(schemaValidate,
-    'signPaymentChannelClaimParameters'),
-  verifyPaymentChannelClaim: _.partial(schemaValidate,
-    'verifyPaymentChannelClaimParameters'),
-  apiOptions: _.partial(schemaValidate, 'api-options'),
-  instructions: _.partial(schemaValidate, 'instructions')
-}
+export const getPaths =
+  _.partial(schemaValidate, 'getPathsParameters')
+
+export const getTransactions =
+_.partial(validateOptions, 'getTransactionsParameters')
+
+export const getSettings =
+_.partial(validateOptions, 'getSettingsParameters')
+
+export const getAccountInfo =
+_.partial(validateOptions, 'getAccountInfoParameters')
+
+export const getTrustlines =
+_.partial(validateOptions, 'getTrustlinesParameters')
+
+export const getBalances =
+_.partial(validateOptions, 'getBalancesParameters')
+
+export const getBalanceSheet =
+_.partial(validateOptions, 'getBalanceSheetParameters')
+
+export const getOrders =
+_.partial(validateOptions, 'getOrdersParameters')
+
+export const getOrderbook =
+_.partial(validateOptions, 'getOrderbookParameters')
+
+export const getTransaction =
+_.partial(validateOptions, 'getTransactionParameters')
+
+export const getPaymentChannel =
+_.partial(validateOptions, 'getPaymentChannelParameters')
+
+export const getLedger =
+_.partial(validateOptions, 'getLedgerParameters')
+
+export const preparePayment =
+_.partial(schemaValidate, 'preparePaymentParameters')
+
+export const prepareOrder =
+_.partial(schemaValidate, 'prepareOrderParameters')
+
+export const prepareOrderCancellation =
+_.partial(schemaValidate, 'prepareOrderCancellationParameters')
+
+export const prepareTrustline =
+_.partial(schemaValidate, 'prepareTrustlineParameters')
+
+export const prepareSettings =
+_.partial(schemaValidate, 'prepareSettingsParameters')
+
+export const prepareEscrowCreation =
+_.partial(schemaValidate, 'prepareEscrowCreationParameters')
+
+export const prepareEscrowCancellation =
+_.partial(schemaValidate, 'prepareEscrowCancellationParameters')
+
+export const prepareEscrowExecution =
+_.partial(schemaValidate, 'prepareEscrowExecutionParameters')
+
+export const preparePaymentChannelCreate =
+_.partial(schemaValidate, 'preparePaymentChannelCreateParameters')
+
+export const preparePaymentChannelFund =
+_.partial(schemaValidate, 'preparePaymentChannelFundParameters')
+
+export const preparePaymentChannelClaim =
+_.partial(schemaValidate, 'preparePaymentChannelClaimParameters')
+
+export const sign =
+_.partial(schemaValidate, 'signParameters')
+
+export const combine =
+_.partial(schemaValidate, 'combineParameters')
+
+export const submit =
+_.partial(schemaValidate, 'submitParameters')
+
+export const computeLedgerHash =
+_.partial(schemaValidate, 'computeLedgerHashParameters')
+
+export const generateAddress =
+_.partial(schemaValidate, 'generateAddressParameters')
+
+export const signPaymentChannelClaim =
+_.partial(schemaValidate, 'signPaymentChannelClaimParameters')
+
+export const verifyPaymentChannelClaim =
+_.partial(schemaValidate, 'verifyPaymentChannelClaimParameters')
+
+export const apiOptions =
+_.partial(schemaValidate, 'api-options')
+
+export const instructions =
+_.partial(schemaValidate, 'instructions')
diff --git a/src/common/wswrapper.js b/src/common/wswrapper.js
index 430b22a8..260b1250 100644
--- a/src/common/wswrapper.js
+++ b/src/common/wswrapper.js
@@ -1,6 +1,6 @@
-'use strict' // eslint-disable-line strict
 
-const {EventEmitter} = require('events')
+
+import events from 'events'
 
 function unsused() {}
 
@@ -8,7 +8,7 @@ function unsused() {}
  * Provides `EventEmitter` interface for native browser `WebSocket`,
  * same, as `ws` package provides.
  */
-class WSWrapper extends EventEmitter {
+class WSWrapper extends events.EventEmitter {
   constructor(url, protocols = null, websocketOptions = {}) {
     super()
     unsused(protocols)
@@ -55,5 +55,5 @@ WSWrapper.OPEN = 1
 WSWrapper.CLOSING = 2
 WSWrapper.CLOSED = 3
 
-module.exports = WSWrapper
+export default WSWrapper
 
diff --git a/src/http.js b/src/http.js
index 79063bed..e0f1512b 100644
--- a/src/http.js
+++ b/src/http.js
@@ -1,11 +1,9 @@
 /* eslint-disable new-cap */
-'use strict' // eslint-disable-line strict
 
-const assert = require('assert')
-const _ = require('lodash')
-const jayson = require('jayson')
-
-const RippleAPI = require('./api').RippleAPI
+import assert from 'assert'
+import * as _ from 'lodash'
+import jayson from 'jayson'
+import {RippleAPI} from './api'
 
 
 /* istanbul ignore next */
@@ -81,6 +79,6 @@ function createHTTPServer(options, httpPort) {
   }
 }
 
-module.exports = {
+export {
   createHTTPServer
 }
diff --git a/src/index.js b/src/index.js
index 081de235..7b1e6e86 100644
--- a/src/index.js
+++ b/src/index.js
@@ -1,7 +1,5 @@
-'use strict' // eslint-disable-line strict
 
-module.exports = {
-  RippleAPI: require('./api').RippleAPI,
-  // Broadcast api is experimental
-  RippleAPIBroadcast: require('./broadcast').RippleAPIBroadcast
-}
+
+export {RippleAPI} from './api'
+// Broadcast api is experimental
+export {RippleAPIBroadcast} from './broadcast'
diff --git a/src/ledger/accountinfo.js b/src/ledger/accountinfo.js
index 1048c4aa..34b5b3f1 100644
--- a/src/ledger/accountinfo.js
+++ b/src/ledger/accountinfo.js
@@ -1,8 +1,6 @@
 /* @flow */
 
-'use strict' // eslint-disable-line strict
-const utils = require('./utils')
-const {validate, removeUndefined} = utils.common
+import {validate, removeUndefined, dropsToXrp} from '../common'
 
 type AccountData = {
   Sequence: number,
@@ -42,7 +40,7 @@ function formatAccountInfo(response: AccountDataResponse) {
   const data = response.account_data
   return removeUndefined({
     sequence: data.Sequence,
-    xrpBalance: utils.common.dropsToXrp(data.Balance),
+    xrpBalance: dropsToXrp(data.Balance),
     ownerCount: data.OwnerCount,
     previousInitiatedTransactionID: data.AccountTxnID,
     previousAffectingTransactionID: data.PreviousTxnID,
@@ -63,4 +61,4 @@ function getAccountInfo(address: string, options: AccountInfoOptions = {}
   return this.connection.request(request).then(formatAccountInfo)
 }
 
-module.exports = getAccountInfo
+export default getAccountInfo
diff --git a/src/ledger/balance-sheet.js b/src/ledger/balance-sheet.js
index 54c02190..d6654b0c 100644
--- a/src/ledger/balance-sheet.js
+++ b/src/ledger/balance-sheet.js
@@ -1,10 +1,9 @@
 /* @flow */
-'use strict' // eslint-disable-line strict
 
-const _ = require('lodash')
-const utils = require('./utils')
-const {validate} = utils.common
-import type {Amount} from '../common/types.js'
+import * as _ from 'lodash'
+import * as utils from './utils'
+import {validate} from '../common'
+import type {Amount} from '../common/types'
 
 type BalanceSheetOptions = {
   excludeAddresses?: Array<string>,
@@ -64,4 +63,4 @@ function getBalanceSheet(address: string, options: BalanceSheetOptions = {}
   })
 }
 
-module.exports = getBalanceSheet
+export default getBalanceSheet
diff --git a/src/ledger/balances.js b/src/ledger/balances.js
index f4958d8f..09db9953 100644
--- a/src/ledger/balances.js
+++ b/src/ledger/balances.js
@@ -1,9 +1,9 @@
 /* @flow */
-'use strict' // eslint-disable-line strict
-const utils = require('./utils')
-const {validate} = utils.common
-import type {Connection} from '../common/connection.js'
-import type {TrustlinesOptions, Trustline} from './trustlines-types.js'
+
+import * as utils from './utils'
+import {validate} from '../common'
+import type {Connection} from '../common'
+import type {TrustlinesOptions, Trustline} from './trustlines-types'
 
 
 type Balance = {
@@ -61,4 +61,4 @@ function getBalances(address: string, options: TrustlinesOptions = {}
     formatBalances(options, {xrp: results[0], trustlines: results[1]}))
 }
 
-module.exports = getBalances
+export default getBalances
diff --git a/src/ledger/ledger.js b/src/ledger/ledger.js
index 669f425a..37661b6e 100644
--- a/src/ledger/ledger.js
+++ b/src/ledger/ledger.js
@@ -1,9 +1,8 @@
 /* @flow */
-'use strict' // eslint-disable-line strict
-const utils = require('./utils')
-const {validate} = utils.common
-const parseLedger = require('./parse/ledger')
-import type {GetLedger} from './types.js'
+
+import {validate} from '../common'
+import parseLedger from './parse/ledger'
+import type {GetLedger} from './types'
 
 type LedgerOptions = {
   ledgerVersion?: number,
@@ -28,4 +27,4 @@ function getLedger(options: LedgerOptions = {}): Promise<GetLedger> {
     parseLedger(response.ledger))
 }
 
-module.exports = getLedger
+export default getLedger
diff --git a/src/ledger/orderbook.js b/src/ledger/orderbook.js
index 21509f90..3ba44959 100644
--- a/src/ledger/orderbook.js
+++ b/src/ledger/orderbook.js
@@ -1,12 +1,12 @@
 /* @flow */
-'use strict' // eslint-disable-line strict
-const _ = require('lodash')
-const utils = require('./utils')
-const {validate} = utils.common
-const parseOrderbookOrder = require('./parse/orderbook-order')
-import type {Connection} from '../common/connection.js'
-import type {OrdersOptions, OrderSpecification} from './types.js'
-import type {Amount, Issue} from '../common/types.js'
+
+import * as _ from 'lodash'
+import * as utils from './utils'
+import parseOrderbookOrder from './parse/orderbook-order'
+import {validate} from '../common'
+import type {Connection} from '../common'
+import type {OrdersOptions, OrderSpecification} from './types'
+import type {Amount, Issue} from '../common/types'
 
 type Orderbook = {
   base: Issue,
@@ -104,4 +104,4 @@ function getOrderbook(address: string, orderbook: Orderbook,
     formatBidsAndAsks(orderbook, _.flatten(data)))
 }
 
-module.exports = getOrderbook
+export default getOrderbook
diff --git a/src/ledger/orders.js b/src/ledger/orders.js
index 98b4561a..af08303d 100644
--- a/src/ledger/orders.js
+++ b/src/ledger/orders.js
@@ -1,11 +1,11 @@
 /* @flow */
-'use strict' // eslint-disable-line strict
-const _ = require('lodash')
-const utils = require('./utils')
-const {validate} = utils.common
-const parseAccountOrder = require('./parse/account-order')
-import type {Connection} from '../common/connection.js'
-import type {OrdersOptions, Order} from './types.js'
+
+import * as _ from 'lodash'
+import * as utils from './utils'
+import {validate} from '../common'
+import type {Connection} from '../common'
+import parseAccountOrder from './parse/account-order'
+import type {OrdersOptions, Order} from './types'
 
 type GetOrders = Array<Order>
 
@@ -38,4 +38,4 @@ function getOrders(address: string, options: OrdersOptions = {}
   })
 }
 
-module.exports = getOrders
+export default getOrders
diff --git a/src/ledger/parse/account-order.js b/src/ledger/parse/account-order.js
index 5e9cf038..6ff343ed 100644
--- a/src/ledger/parse/account-order.js
+++ b/src/ledger/parse/account-order.js
@@ -1,9 +1,10 @@
 /* @flow */
-'use strict' // eslint-disable-line strict
-const utils = require('./utils')
-const flags = require('./flags').orderFlags
-const parseAmount = require('./amount')
-const BigNumber = require('bignumber.js')
+
+import BigNumber from 'bignumber.js'
+import parseAmount from './amount'
+import {parseTimestamp, adjustQualityForXRP} from './utils'
+import {removeUndefined} from '../../common'
+import {orderFlags} from './flags'
 
 // TODO: remove this function once rippled provides quality directly
 function computeQuality(takerGets, takerPays) {
@@ -14,7 +15,7 @@ function computeQuality(takerGets, takerPays) {
 // rippled 'account_offers' returns a different format for orders than 'tx'
 // the flags are also different
 function parseAccountOrder(address: string, order: Object): Object {
-  const direction = (order.flags & flags.Sell) === 0 ? 'buy' : 'sell'
+  const direction = (order.flags & orderFlags.Sell) === 0 ? 'buy' : 'sell'
   const takerGetsAmount = parseAmount(order.taker_gets)
   const takerPaysAmount = parseAmount(order.taker_pays)
   const quantity = (direction === 'buy') ? takerPaysAmount : takerGetsAmount
@@ -22,17 +23,17 @@ function parseAccountOrder(address: string, order: Object): Object {
 
   // note: immediateOrCancel and fillOrKill orders cannot enter the order book
   // so we can omit those flags here
-  const specification = utils.removeUndefined({
+  const specification = removeUndefined({
     direction: direction,
     quantity: quantity,
     totalPrice: totalPrice,
-    passive: ((order.flags & flags.Passive) !== 0) || undefined,
+    passive: ((order.flags & orderFlags.Passive) !== 0) || undefined,
     // rippled currently does not provide "expiration" in account_offers
-    expirationTime: utils.parseTimestamp(order.expiration)
+    expirationTime: parseTimestamp(order.expiration)
   })
 
   const makerExchangeRate = order.quality ?
-    utils.adjustQualityForXRP(order.quality.toString(),
+    adjustQualityForXRP(order.quality.toString(),
       takerGetsAmount.currency, takerPaysAmount.currency) :
     computeQuality(takerGetsAmount, takerPaysAmount)
   const properties = {
@@ -44,4 +45,4 @@ function parseAccountOrder(address: string, order: Object): Object {
   return {specification, properties}
 }
 
-module.exports = parseAccountOrder
+export default parseAccountOrder
diff --git a/src/ledger/parse/account-trustline.js b/src/ledger/parse/account-trustline.js
index a8168a5c..7d06691c 100644
--- a/src/ledger/parse/account-trustline.js
+++ b/src/ledger/parse/account-trustline.js
@@ -1,6 +1,7 @@
 /* @flow */
-'use strict' // eslint-disable-line strict
-const utils = require('./utils')
+
+import {parseQuality} from './utils'
+import {removeUndefined} from '../../common'
 
 type Trustline = {
   account: string, limit: number, currency: string, quality_in: ?number,
@@ -20,18 +21,18 @@ type AccountTrustline = {
 // rippled 'account_lines' returns a different format for
 // trustlines than 'tx'
 function parseAccountTrustline(trustline: Trustline): AccountTrustline {
-  const specification = utils.removeUndefined({
+  const specification = removeUndefined({
     limit: trustline.limit,
     currency: trustline.currency,
     counterparty: trustline.account,
-    qualityIn: utils.parseQuality(trustline.quality_in) || undefined,
-    qualityOut: utils.parseQuality(trustline.quality_out) || undefined,
+    qualityIn: parseQuality(trustline.quality_in) || undefined,
+    qualityOut: parseQuality(trustline.quality_out) || undefined,
     ripplingDisabled: trustline.no_ripple || undefined,
     frozen: trustline.freeze || undefined,
     authorized: trustline.authorized || undefined
   })
   // rippled doesn't provide the counterparty's qualities
-  const counterparty = utils.removeUndefined({
+  const counterparty = removeUndefined({
     limit: trustline.limit_peer,
     ripplingDisabled: trustline.no_ripple_peer || undefined,
     frozen: trustline.freeze_peer || undefined,
@@ -43,4 +44,4 @@ function parseAccountTrustline(trustline: Trustline): AccountTrustline {
   return {specification, counterparty, state}
 }
 
-module.exports = parseAccountTrustline
+export default parseAccountTrustline
diff --git a/src/ledger/parse/amendment.js b/src/ledger/parse/amendment.js
index 6f67328a..84e91290 100644
--- a/src/ledger/parse/amendment.js
+++ b/src/ledger/parse/amendment.js
@@ -1,4 +1,4 @@
-'use strict' // eslint-disable-line strict
+
 
 function parseAmendment(tx: Object) {
   return {
@@ -6,4 +6,4 @@ function parseAmendment(tx: Object) {
   }
 }
 
-module.exports = parseAmendment
+export default parseAmendment
diff --git a/src/ledger/parse/amount.js b/src/ledger/parse/amount.js
index c985b6a3..d5e2b724 100644
--- a/src/ledger/parse/amount.js
+++ b/src/ledger/parse/amount.js
@@ -1,14 +1,14 @@
 /* @flow */
-'use strict' // eslint-disable-line strict
-const utils = require('../utils')
-import type {Amount, RippledAmount} from '../../common/types.js'
+
+import * as common from '../../common'
+import type {Amount, RippledAmount} from '../../common/types'
 
 
 function parseAmount(amount: RippledAmount): Amount {
   if (typeof amount === 'string') {
     return {
       currency: 'XRP',
-      value: utils.common.dropsToXrp(amount)
+      value: common.dropsToXrp(amount)
     }
   }
   return {
@@ -18,4 +18,4 @@ function parseAmount(amount: RippledAmount): Amount {
   }
 }
 
-module.exports = parseAmount
+export default parseAmount
diff --git a/src/ledger/parse/cancellation.js b/src/ledger/parse/cancellation.js
index a2672746..4cb43172 100644
--- a/src/ledger/parse/cancellation.js
+++ b/src/ledger/parse/cancellation.js
@@ -1,6 +1,6 @@
 /* @flow */
-'use strict' // eslint-disable-line strict
-const assert = require('assert')
+
+import assert from 'assert'
 
 function parseOrderCancellation(tx: Object): Object {
   assert(tx.TransactionType === 'OfferCancel')
@@ -9,4 +9,4 @@ function parseOrderCancellation(tx: Object): Object {
   }
 }
 
-module.exports = parseOrderCancellation
+export default parseOrderCancellation
diff --git a/src/ledger/parse/escrow-cancellation.js b/src/ledger/parse/escrow-cancellation.js
index 7c01d8f5..7458dc96 100644
--- a/src/ledger/parse/escrow-cancellation.js
+++ b/src/ledger/parse/escrow-cancellation.js
@@ -1,16 +1,17 @@
 /* @flow */
-'use strict' // eslint-disable-line strict
-const assert = require('assert')
-const utils = require('./utils')
+
+import assert from 'assert'
+import {parseMemos} from './utils'
+import {removeUndefined} from '../../common'
 
 function parseEscrowCancellation(tx: Object): Object {
   assert(tx.TransactionType === 'EscrowCancel')
 
-  return utils.removeUndefined({
-    memos: utils.parseMemos(tx),
+  return removeUndefined({
+    memos: parseMemos(tx),
     owner: tx.Owner,
     escrowSequence: tx.OfferSequence
   })
 }
 
-module.exports = parseEscrowCancellation
+export default parseEscrowCancellation
diff --git a/src/ledger/parse/escrow-creation.js b/src/ledger/parse/escrow-creation.js
index 47c1ffd7..e324c824 100644
--- a/src/ledger/parse/escrow-creation.js
+++ b/src/ledger/parse/escrow-creation.js
@@ -1,22 +1,23 @@
 /* @flow */
-'use strict' // eslint-disable-line strict
-const assert = require('assert')
-const utils = require('./utils')
-const parseAmount = require('./amount')
+
+import assert from 'assert'
+import parseAmount from './amount'
+import {parseTimestamp, parseMemos} from './utils'
+import {removeUndefined} from '../../common'
 
 function parseEscrowCreation(tx: Object): Object {
   assert(tx.TransactionType === 'EscrowCreate')
 
-  return utils.removeUndefined({
+  return removeUndefined({
     amount: parseAmount(tx.Amount).value,
     destination: tx.Destination,
-    memos: utils.parseMemos(tx),
+    memos: parseMemos(tx),
     condition: tx.Condition,
-    allowCancelAfter: utils.parseTimestamp(tx.CancelAfter),
-    allowExecuteAfter: utils.parseTimestamp(tx.FinishAfter),
+    allowCancelAfter: parseTimestamp(tx.CancelAfter),
+    allowExecuteAfter: parseTimestamp(tx.FinishAfter),
     sourceTag: tx.SourceTag,
     destinationTag: tx.DestinationTag
   })
 }
 
-module.exports = parseEscrowCreation
+export default parseEscrowCreation
diff --git a/src/ledger/parse/escrow-execution.js b/src/ledger/parse/escrow-execution.js
index 0fd444fc..a68ae834 100644
--- a/src/ledger/parse/escrow-execution.js
+++ b/src/ledger/parse/escrow-execution.js
@@ -1,13 +1,14 @@
 /* @flow */
-'use strict' // eslint-disable-line strict
-const assert = require('assert')
-const utils = require('./utils')
+
+import assert from 'assert'
+import {parseMemos} from './utils'
+import {removeUndefined} from '../../common'
 
 function parseEscrowExecution(tx: Object): Object {
   assert(tx.TransactionType === 'EscrowFinish')
 
-  return utils.removeUndefined({
-    memos: utils.parseMemos(tx),
+  return removeUndefined({
+    memos: parseMemos(tx),
     owner: tx.Owner,
     escrowSequence: tx.OfferSequence,
     condition: tx.Condition,
@@ -15,4 +16,4 @@ function parseEscrowExecution(tx: Object): Object {
   })
 }
 
-module.exports = parseEscrowExecution
+export default parseEscrowExecution
diff --git a/src/ledger/parse/fee-update.js b/src/ledger/parse/fee-update.js
index 6f5079fa..8bb18fee 100644
--- a/src/ledger/parse/fee-update.js
+++ b/src/ledger/parse/fee-update.js
@@ -1,6 +1,6 @@
-'use strict' // eslint-disable-line strict
-const BigNumber = require('bignumber.js')
-const {dropsToXrp} = require('./utils')
+
+import BigNumber from 'bignumber.js'
+import {dropsToXrp} from '../../common'
 
 function parseFeeUpdate(tx: Object) {
   const baseFeeDrops = (new BigNumber(tx.BaseFee, 16)).toString()
@@ -12,4 +12,4 @@ function parseFeeUpdate(tx: Object) {
   }
 }
 
-module.exports = parseFeeUpdate
+export default parseFeeUpdate
diff --git a/src/ledger/parse/fields.js b/src/ledger/parse/fields.js
index 68ea3749..0ba5e586 100644
--- a/src/ledger/parse/fields.js
+++ b/src/ledger/parse/fields.js
@@ -1,8 +1,9 @@
 /* @flow */
-'use strict' // eslint-disable-line strict
-const _ = require('lodash')
-const BigNumber = require('bignumber.js')
-const AccountFields = require('./utils').constants.AccountFields
+
+import * as _ from 'lodash'
+import BigNumber from 'bignumber.js'
+import {constants} from '../../common'
+const AccountFields = constants.AccountFields
 
 function parseField(info, value) {
   if (info.encoding === 'hex' && !info.length) { // e.g. "domain"
@@ -49,4 +50,4 @@ function parseFields(data: Object): Object {
   return settings
 }
 
-module.exports = parseFields
+export default parseFields
diff --git a/src/ledger/parse/flags.js b/src/ledger/parse/flags.js
index af5c2a82..1937415f 100644
--- a/src/ledger/parse/flags.js
+++ b/src/ledger/parse/flags.js
@@ -1,4 +1,4 @@
-'use strict' // eslint-disable-line strict
+
 
 const orderFlags = {
   Passive: 0x00010000,
@@ -16,7 +16,7 @@ const trustlineFlags = {
   HighFreeze: 0x00800000
 }
 
-module.exports = {
+export {
   orderFlags,
   trustlineFlags
 }
diff --git a/src/ledger/parse/ledger.js b/src/ledger/parse/ledger.js
index a92d9780..8ebb29a1 100644
--- a/src/ledger/parse/ledger.js
+++ b/src/ledger/parse/ledger.js
@@ -1,9 +1,9 @@
 /* @flow */
-'use strict' // eslint-disable-line strict
-const _ = require('lodash')
-const {removeUndefined, rippleTimeToISO8601} = require('./utils')
-const parseTransaction = require('./transaction')
-import type {GetLedger} from '../types.js'
+
+import * as _ from 'lodash'
+import {removeUndefined, rippleTimeToISO8601} from '../../common'
+import parseTransaction from './transaction'
+import type {GetLedger} from '../types'
 
 function parseTransactionWrapper(ledgerVersion, tx) {
   const transaction = _.assign({}, _.omit(tx, 'metaData'), {
@@ -60,4 +60,4 @@ function parseLedger(ledger: Object): GetLedger {
   ))
 }
 
-module.exports = parseLedger
+export default parseLedger
diff --git a/src/ledger/parse/order.js b/src/ledger/parse/order.js
index e17ce8de..96c2ccf5 100644
--- a/src/ledger/parse/order.js
+++ b/src/ledger/parse/order.js
@@ -1,9 +1,10 @@
 /* @flow */
-'use strict' // eslint-disable-line strict
-const assert = require('assert')
-const utils = require('./utils')
-const parseAmount = require('./amount')
-const flags = utils.txFlags.OfferCreate
+
+import assert from 'assert'
+import {parseTimestamp} from './utils'
+import parseAmount from './amount'
+import {removeUndefined, txFlags} from '../../common'
+const flags = txFlags.OfferCreate
 
 function parseOrder(tx: Object): Object {
   assert(tx.TransactionType === 'OfferCreate')
@@ -14,7 +15,7 @@ function parseOrder(tx: Object): Object {
   const quantity = (direction === 'buy') ? takerPaysAmount : takerGetsAmount
   const totalPrice = (direction === 'buy') ? takerGetsAmount : takerPaysAmount
 
-  return utils.removeUndefined({
+  return removeUndefined({
     direction: direction,
     quantity: quantity,
     totalPrice: totalPrice,
@@ -22,8 +23,8 @@ function parseOrder(tx: Object): Object {
     immediateOrCancel: ((tx.Flags & flags.ImmediateOrCancel) !== 0)
       || undefined,
     fillOrKill: ((tx.Flags & flags.FillOrKill) !== 0) || undefined,
-    expirationTime: utils.parseTimestamp(tx.Expiration)
+    expirationTime: parseTimestamp(tx.Expiration)
   })
 }
 
-module.exports = parseOrder
+export default parseOrder
diff --git a/src/ledger/parse/orderbook-order.js b/src/ledger/parse/orderbook-order.js
index 2aeae7d5..8f27acf0 100644
--- a/src/ledger/parse/orderbook-order.js
+++ b/src/ledger/parse/orderbook-order.js
@@ -1,12 +1,14 @@
 /* @flow */
-'use strict' // eslint-disable-line strict
-const _ = require('lodash')
-const utils = require('./utils')
-const flags = require('./flags').orderFlags
-const parseAmount = require('./amount')
+
+import * as _ from 'lodash'
+import {parseTimestamp, adjustQualityForXRP} from './utils'
+import {removeUndefined} from '../../common'
+
+import {orderFlags} from './flags'
+import parseAmount from './amount'
 
 function parseOrderbookOrder(order: Object): Object {
-  const direction = (order.Flags & flags.Sell) === 0 ? 'buy' : 'sell'
+  const direction = (order.Flags & orderFlags.Sell) === 0 ? 'buy' : 'sell'
   const takerGetsAmount = parseAmount(order.TakerGets)
   const takerPaysAmount = parseAmount(order.TakerPays)
   const quantity = (direction === 'buy') ? takerPaysAmount : takerGetsAmount
@@ -14,18 +16,18 @@ function parseOrderbookOrder(order: Object): Object {
 
   // note: immediateOrCancel and fillOrKill orders cannot enter the order book
   // so we can omit those flags here
-  const specification = utils.removeUndefined({
+  const specification = removeUndefined({
     direction: direction,
     quantity: quantity,
     totalPrice: totalPrice,
-    passive: ((order.Flags & flags.Passive) !== 0) || undefined,
-    expirationTime: utils.parseTimestamp(order.Expiration)
+    passive: ((order.Flags & orderFlags.Passive) !== 0) || undefined,
+    expirationTime: parseTimestamp(order.Expiration)
   })
 
   const properties = {
     maker: order.Account,
     sequence: order.Sequence,
-    makerExchangeRate: utils.adjustQualityForXRP(order.quality,
+    makerExchangeRate: adjustQualityForXRP(order.quality,
       takerGetsAmount.currency, takerPaysAmount.currency)
   }
 
@@ -33,12 +35,12 @@ function parseOrderbookOrder(order: Object): Object {
     parseAmount(order.taker_gets_funded) : undefined
   const takerPaysFunded = order.taker_pays_funded ?
     parseAmount(order.taker_pays_funded) : undefined
-  const available = utils.removeUndefined({
+  const available = removeUndefined({
     fundedAmount: takerGetsFunded,
     priceOfFundedAmount: takerPaysFunded
   })
   const state = _.isEmpty(available) ? undefined : available
-  return utils.removeUndefined({specification, properties, state})
+  return removeUndefined({specification, properties, state})
 }
 
-module.exports = parseOrderbookOrder
+export default parseOrderbookOrder
diff --git a/src/ledger/parse/pathfind.js b/src/ledger/parse/pathfind.js
index 5f3c2091..18352291 100644
--- a/src/ledger/parse/pathfind.js
+++ b/src/ledger/parse/pathfind.js
@@ -1,9 +1,9 @@
 /* @flow */
-'use strict' // eslint-disable-line strict
-const _ = require('lodash')
-const parseAmount = require('./amount')
-import type {Amount, RippledAmount} from '../../common/types.js'
-import type {GetPaths, RippledPathsResponse} from '../pathfind-types.js'
+
+import * as _ from 'lodash'
+import parseAmount from './amount'
+import type {Amount, RippledAmount} from '../../common/types'
+import type {GetPaths, RippledPathsResponse} from '../pathfind-types'
 
 function parsePaths(paths) {
   return paths.map(steps => steps.map(step =>
@@ -48,4 +48,4 @@ function parsePathfind(pathfindResult: RippledPathsResponse): GetPaths {
     sourceAddress, destinationAddress, destinationAmount))
 }
 
-module.exports = parsePathfind
+export default parsePathfind
diff --git a/src/ledger/parse/payment-channel-claim.js b/src/ledger/parse/payment-channel-claim.js
index ee8420e3..cb873dcb 100644
--- a/src/ledger/parse/payment-channel-claim.js
+++ b/src/ledger/parse/payment-channel-claim.js
@@ -1,14 +1,14 @@
 /* @flow */
-'use strict' // eslint-disable-line strict
-const assert = require('assert')
-const utils = require('./utils')
-const parseAmount = require('./amount')
-const claimFlags = utils.txFlags.PaymentChannelClaim
+
+import assert from 'assert'
+import {removeUndefined, txFlags} from '../../common'
+import parseAmount from './amount'
+const claimFlags = txFlags.PaymentChannelClaim
 
 function parsePaymentChannelClaim(tx: Object): Object {
   assert(tx.TransactionType === 'PaymentChannelClaim')
 
-  return utils.removeUndefined({
+  return removeUndefined({
     channel: tx.Channel,
     balance: tx.Balance && parseAmount(tx.Balance).value,
     amount: tx.Amount && parseAmount(tx.Amount).value,
@@ -19,4 +19,4 @@ function parsePaymentChannelClaim(tx: Object): Object {
   })
 }
 
-module.exports = parsePaymentChannelClaim
+export default parsePaymentChannelClaim
diff --git a/src/ledger/parse/payment-channel-create.js b/src/ledger/parse/payment-channel-create.js
index 32fd205b..d55080b9 100644
--- a/src/ledger/parse/payment-channel-create.js
+++ b/src/ledger/parse/payment-channel-create.js
@@ -1,21 +1,22 @@
 /* @flow */
-'use strict' // eslint-disable-line strict
-const assert = require('assert')
-const utils = require('./utils')
-const parseAmount = require('./amount')
+
+import assert from 'assert'
+import {parseTimestamp} from './utils'
+import {removeUndefined} from '../../common'
+import parseAmount from './amount'
 
 function parsePaymentChannelCreate(tx: Object): Object {
   assert(tx.TransactionType === 'PaymentChannelCreate')
 
-  return utils.removeUndefined({
+  return removeUndefined({
     amount: parseAmount(tx.Amount).value,
     destination: tx.Destination,
     settleDelay: tx.SettleDelay,
     publicKey: tx.PublicKey,
-    cancelAfter: tx.CancelAfter && utils.parseTimestamp(tx.CancelAfter),
+    cancelAfter: tx.CancelAfter && parseTimestamp(tx.CancelAfter),
     sourceTag: tx.SourceTag,
     destinationTag: tx.DestinationTag
   })
 }
 
-module.exports = parsePaymentChannelCreate
+export default parsePaymentChannelCreate
diff --git a/src/ledger/parse/payment-channel-fund.js b/src/ledger/parse/payment-channel-fund.js
index ce6369b2..f92b0a2f 100644
--- a/src/ledger/parse/payment-channel-fund.js
+++ b/src/ledger/parse/payment-channel-fund.js
@@ -1,17 +1,18 @@
 /* @flow */
-'use strict' // eslint-disable-line strict
-const assert = require('assert')
-const utils = require('./utils')
-const parseAmount = require('./amount')
+
+import assert from 'assert'
+import {parseTimestamp} from './utils'
+import {removeUndefined} from '../../common'
+import parseAmount from './amount'
 
 function parsePaymentChannelFund(tx: Object): Object {
   assert(tx.TransactionType === 'PaymentChannelFund')
 
-  return utils.removeUndefined({
+  return removeUndefined({
     channel: tx.Channel,
     amount: parseAmount(tx.Amount).value,
-    expiration: tx.Expiration && utils.parseTimestamp(tx.Expiration)
+    expiration: tx.Expiration && parseTimestamp(tx.Expiration)
   })
 }
 
-module.exports = parsePaymentChannelFund
+export default parsePaymentChannelFund
diff --git a/src/ledger/parse/payment-channel.js b/src/ledger/parse/payment-channel.js
index 024c49cc..d3ba9d05 100644
--- a/src/ledger/parse/payment-channel.js
+++ b/src/ledger/parse/payment-channel.js
@@ -1,6 +1,7 @@
 /* @flow */
-'use strict' // eslint-disable-line strict
-const utils = require('./utils')
+
+import {parseTimestamp} from './utils'
+import {removeUndefined, dropsToXrp} from '../../common'
 
 type PaymentChannelResponse = {
   account: string,
@@ -17,15 +18,15 @@ type PaymentChannelResponse = {
 }
 
 function parsePaymentChannel(data: Object): PaymentChannelResponse {
-  return utils.removeUndefined({
+  return removeUndefined({
     account: data.Account,
-    amount: utils.dropsToXrp(data.Amount),
-    balance: utils.dropsToXrp(data.Balance),
+    amount: dropsToXrp(data.Amount),
+    balance: dropsToXrp(data.Balance),
     destination: data.Destination,
     publicKey: data.PublicKey,
     settleDelay: data.SettleDelay,
-    expiration: utils.parseTimestamp(data.Expiration),
-    cancelAfter: utils.parseTimestamp(data.CancelAfter),
+    expiration: parseTimestamp(data.Expiration),
+    cancelAfter: parseTimestamp(data.CancelAfter),
     sourceTag: data.SourceTag,
     destinationTag: data.DestinationTag,
     previousAffectingTransactionID: data.PreviousTxnID,
@@ -33,4 +34,4 @@ function parsePaymentChannel(data: Object): PaymentChannelResponse {
   })
 }
 
-module.exports = parsePaymentChannel
+export default parsePaymentChannel
diff --git a/src/ledger/parse/payment.js b/src/ledger/parse/payment.js
index f2229102..1f271ca4 100644
--- a/src/ledger/parse/payment.js
+++ b/src/ledger/parse/payment.js
@@ -1,10 +1,10 @@
 /* @flow */
-'use strict' // eslint-disable-line strict
-const _ = require('lodash')
-const assert = require('assert')
-const utils = require('./utils')
-const parseAmount = require('./amount')
-const txFlags = utils.txFlags
+
+import * as _ from 'lodash'
+import assert from 'assert'
+import * as utils from './utils'
+import {txFlags, removeUndefined} from '../../common'
+import parseAmount from './amount'
 
 function isNoDirectRipple(tx) {
   return (tx.Flags & txFlags.Payment.NoRippleDirect) !== 0
@@ -35,9 +35,9 @@ function parsePayment(tx: Object): Object {
     tag: tx.DestinationTag
   }
 
-  return utils.removeUndefined({
-    source: utils.removeUndefined(source),
-    destination: utils.removeUndefined(destination),
+  return removeUndefined({
+    source: removeUndefined(source),
+    destination: removeUndefined(destination),
     memos: utils.parseMemos(tx),
     invoiceID: tx.InvoiceID,
     paths: tx.Paths ? JSON.stringify(tx.Paths) : undefined,
@@ -47,4 +47,4 @@ function parsePayment(tx: Object): Object {
   })
 }
 
-module.exports = parsePayment
+export default parsePayment
diff --git a/src/ledger/parse/settings.js b/src/ledger/parse/settings.js
index 630655f7..eebc871a 100644
--- a/src/ledger/parse/settings.js
+++ b/src/ledger/parse/settings.js
@@ -1,9 +1,10 @@
 /* @flow */
-'use strict' // eslint-disable-line strict
-const _ = require('lodash')
-const assert = require('assert')
-const AccountFlags = require('./utils').constants.AccountFlags
-const parseFields = require('./fields')
+
+import * as _ from 'lodash'
+import assert from 'assert'
+import {constants} from '../../common'
+const AccountFlags = constants.AccountFlags
+import parseFields from './fields'
 
 function getAccountRootModifiedNode(tx: Object) {
   const modifiedNodes = tx.meta.AffectedNodes.filter(node =>
@@ -58,4 +59,4 @@ function parseSettings(tx: Object) {
   return _.assign({}, parseFlags(tx), parseFields(tx))
 }
 
-module.exports = parseSettings
+export default parseSettings
diff --git a/src/ledger/parse/transaction.js b/src/ledger/parse/transaction.js
index 527ac68a..888b6c12 100644
--- a/src/ledger/parse/transaction.js
+++ b/src/ledger/parse/transaction.js
@@ -1,20 +1,21 @@
 /* @flow */
-'use strict' // eslint-disable-line strict
-const assert = require('assert')
-const utils = require('./utils')
-const parsePayment = require('./payment')
-const parseTrustline = require('./trustline')
-const parseOrder = require('./order')
-const parseOrderCancellation = require('./cancellation')
-const parseSettings = require('./settings')
-const parseEscrowCreation = require('./escrow-creation')
-const parseEscrowExecution = require('./escrow-execution')
-const parseEscrowCancellation = require('./escrow-cancellation')
-const parsePaymentChannelCreate = require('./payment-channel-create')
-const parsePaymentChannelFund = require('./payment-channel-fund')
-const parsePaymentChannelClaim = require('./payment-channel-claim')
-const parseFeeUpdate = require('./fee-update')
-const parseAmendment = require('./amendment')
+
+import assert from 'assert'
+import {parseOutcome} from './utils'
+import {removeUndefined} from '../../common'
+import parsePayment from './payment'
+import parseTrustline from './trustline'
+import parseOrder from './order'
+import parseOrderCancellation from './cancellation'
+import parseSettings from './settings'
+import parseEscrowCreation from './escrow-creation'
+import parseEscrowExecution from './escrow-execution'
+import parseEscrowCancellation from './escrow-cancellation'
+import parsePaymentChannelCreate from './payment-channel-create'
+import parsePaymentChannelFund from './payment-channel-fund'
+import parsePaymentChannelClaim from './payment-channel-claim'
+import parseFeeUpdate from './fee-update'
+import parseAmendment from './amendment'
 
 function parseTransactionType(type) {
   const mapping = {
@@ -57,15 +58,15 @@ function parseTransaction(tx: Object): Object {
   const parser: Function = (mapping: Object)[type]
   assert(parser !== undefined, 'Unrecognized transaction type')
   const specification = parser(tx)
-  const outcome = utils.parseOutcome(tx)
-  return utils.removeUndefined({
+  const outcome = parseOutcome(tx)
+  return removeUndefined({
     type: type,
     address: tx.Account,
     sequence: tx.Sequence,
     id: tx.hash,
-    specification: utils.removeUndefined(specification),
-    outcome: outcome ? utils.removeUndefined(outcome) : undefined
+    specification: removeUndefined(specification),
+    outcome: outcome ? removeUndefined(outcome) : undefined
   })
 }
 
-module.exports = parseTransaction
+export default parseTransaction
diff --git a/src/ledger/parse/trustline.js b/src/ledger/parse/trustline.js
index 20697f3d..bacd6ad7 100644
--- a/src/ledger/parse/trustline.js
+++ b/src/ledger/parse/trustline.js
@@ -1,8 +1,9 @@
 /* @flow */
-'use strict' // eslint-disable-line strict
-const assert = require('assert')
-const utils = require('./utils')
-const flags = utils.txFlags.TrustSet
+
+import assert from 'assert'
+import {parseQuality} from './utils'
+import {txFlags, removeUndefined} from '../../common'
+const flags = txFlags.TrustSet
 
 function parseFlag(flagsValue, trueValue, falseValue) {
   if (flagsValue & trueValue) {
@@ -17,12 +18,12 @@ function parseFlag(flagsValue, trueValue, falseValue) {
 function parseTrustline(tx: Object): Object {
   assert(tx.TransactionType === 'TrustSet')
 
-  return utils.removeUndefined({
+  return removeUndefined({
     limit: tx.LimitAmount.value,
     currency: tx.LimitAmount.currency,
     counterparty: tx.LimitAmount.issuer,
-    qualityIn: utils.parseQuality(tx.QualityIn),
-    qualityOut: utils.parseQuality(tx.QualityOut),
+    qualityIn: parseQuality(tx.QualityIn),
+    qualityOut: parseQuality(tx.QualityOut),
     ripplingDisabled: parseFlag(
       tx.Flags, flags.SetNoRipple, flags.ClearNoRipple),
     frozen: parseFlag(tx.Flags, flags.SetFreeze, flags.ClearFreeze),
@@ -30,4 +31,4 @@ function parseTrustline(tx: Object): Object {
   })
 }
 
-module.exports = parseTrustline
+export default parseTrustline
diff --git a/src/ledger/parse/utils.js b/src/ledger/parse/utils.js
index 25f9b8ad..6c050dd3 100644
--- a/src/ledger/parse/utils.js
+++ b/src/ledger/parse/utils.js
@@ -1,12 +1,12 @@
 /* @flow */
-'use strict' // eslint-disable-line strict
-const _ = require('lodash')
-const transactionParser = require('ripple-lib-transactionparser')
-const utils = require('../utils')
-const BigNumber = require('bignumber.js')
-const parseAmount = require('./amount')
 
-import type {Amount} from '../../common/types.js'
+import * as _ from 'lodash'
+import transactionParser from 'ripple-lib-transactionparser'
+import BigNumber from 'bignumber.js'
+import * as common from '../../common'
+import parseAmount from './amount'
+
+import type {Amount} from '../../common/types'
 
 function adjustQualityForXRP(
   quality: string, takerGetsCurrency: string, takerPaysCurrency: string
@@ -28,7 +28,7 @@ function parseQuality(quality: ?number) {
 }
 
 function parseTimestamp(rippleTime: number): string | void {
-  return rippleTime ? utils.common.rippleTimeToISO8601(rippleTime) : undefined
+  return rippleTime ? common.rippleTimeToISO8601(rippleTime) : undefined
 }
 
 function removeEmptyCounterparty(amount) {
@@ -52,7 +52,7 @@ function removeEmptyCounterpartyInOrderbookChanges(orderbookChanges) {
 }
 
 function isPartialPayment(tx: Object) {
-  return (tx.Flags & utils.common.txFlags.Payment.PartialPayment) !== 0
+  return (tx.Flags & common.txFlags.Payment.PartialPayment) !== 0
 }
 
 function parseDeliveredAmount(tx: Object): Amount | void {
@@ -105,10 +105,10 @@ function parseOutcome(tx: Object): ?Object {
   removeEmptyCounterpartyInBalanceChanges(balanceChanges)
   removeEmptyCounterpartyInOrderbookChanges(orderbookChanges)
 
-  return utils.common.removeUndefined({
+  return common.removeUndefined({
     result: tx.meta.TransactionResult,
     timestamp: parseTimestamp(tx.date),
-    fee: utils.common.dropsToXrp(tx.Fee),
+    fee: common.dropsToXrp(tx.Fee),
     balanceChanges: balanceChanges,
     orderbookChanges: orderbookChanges,
     ledgerVersion: tx.ledger_index,
@@ -126,7 +126,7 @@ function parseMemos(tx: Object): ?Array<Object> {
     return undefined
   }
   return tx.Memos.map(m => {
-    return utils.common.removeUndefined({
+    return common.removeUndefined({
       type: m.Memo.parsed_memo_type || hexToString(m.Memo.MemoType),
       format: m.Memo.parsed_memo_format || hexToString(m.Memo.MemoFormat),
       data: m.Memo.parsed_memo_data || hexToString(m.Memo.MemoData)
@@ -134,17 +134,12 @@ function parseMemos(tx: Object): ?Array<Object> {
   })
 }
 
-module.exports = {
+export {
   parseQuality,
   parseOutcome,
   parseMemos,
   hexToString,
   parseTimestamp,
   adjustQualityForXRP,
-  isPartialPayment,
-  dropsToXrp: utils.common.dropsToXrp,
-  constants: utils.common.constants,
-  txFlags: utils.common.txFlags,
-  removeUndefined: utils.common.removeUndefined,
-  rippleTimeToISO8601: utils.common.rippleTimeToISO8601
+  isPartialPayment
 }
diff --git a/src/ledger/pathfind-types.js b/src/ledger/pathfind-types.js
index c7bdae1d..1cbdaf03 100644
--- a/src/ledger/pathfind-types.js
+++ b/src/ledger/pathfind-types.js
@@ -1,8 +1,8 @@
 /* @flow */
-'use strict' // eslint-disable-line strict
+
 
 import type {Amount, LaxLaxAmount, RippledAmount, Adjustment, MaxAdjustment,
-  MinAdjustment} from '../common/types.js'
+  MinAdjustment} from '../common/types'
 
 
 type Path = {
diff --git a/src/ledger/pathfind.js b/src/ledger/pathfind.js
index c0ddb53b..f06ff870 100644
--- a/src/ledger/pathfind.js
+++ b/src/ledger/pathfind.js
@@ -1,16 +1,17 @@
 /* @flow */
-'use strict' // eslint-disable-line strict
-const _ = require('lodash')
-const BigNumber = require('bignumber.js')
-const utils = require('./utils')
-const parsePathfind = require('./parse/pathfind')
-const {validate, toRippledAmount} = utils.common
-const NotFoundError = utils.common.errors.NotFoundError
-const ValidationError = utils.common.errors.ValidationError
-import type {Connection} from '../common/connection'
-import type {RippledAmount} from '../common/types.js'
-import type {GetPaths, PathFind, RippledPathsResponse, PathFindRequest}
-  from './pathfind-types.js'
+
+import * as _ from 'lodash'
+import BigNumber from 'bignumber.js'
+import {getXRPBalance} from './utils'
+import {validate, toRippledAmount, errors} from '../common'
+import type {Connection} from '../common'
+import parsePathfind from './parse/pathfind'
+import type {RippledAmount} from '../common/types'
+import type {
+  GetPaths, PathFind, RippledPathsResponse, PathFindRequest
+} from './pathfind-types'
+const NotFoundError = errors.NotFoundError
+const ValidationError = errors.ValidationError
 
 
 function addParams(request: PathFindRequest, result: RippledPathsResponse
@@ -83,7 +84,7 @@ function conditionallyAddDirectXRPPath(connection: Connection, address: string,
       || !_.includes(paths.destination_currencies, 'XRP')) {
     return Promise.resolve(paths)
   }
-  return utils.getXRPBalance(connection, address, undefined).then(
+  return getXRPBalance(connection, address, undefined).then(
     xrpBalance => addDirectXrpPath(paths, xrpBalance))
 }
 
@@ -137,4 +138,4 @@ function getPaths(pathfind: PathFind): Promise<GetPaths> {
     .then(paths => formatResponse(pathfind, paths))
 }
 
-module.exports = getPaths
+export default getPaths
diff --git a/src/ledger/payment-channel.js b/src/ledger/payment-channel.js
index 4f73a56f..ae7b154b 100644
--- a/src/ledger/payment-channel.js
+++ b/src/ledger/payment-channel.js
@@ -1,9 +1,8 @@
 /* @flow */
-'use strict' // eslint-disable-line strict
-const utils = require('./utils')
-const parsePaymentChannel = require('./parse/payment-channel')
-const {validate} = utils.common
-const NotFoundError = utils.common.errors.NotFoundError
+
+import parsePaymentChannel from './parse/payment-channel'
+import {validate, errors} from '../common'
+const NotFoundError = errors.NotFoundError
 
 type PaymentChannel = {
   Sequence: number,
@@ -53,4 +52,4 @@ function getPaymentChannel(id: string): Promise<PaymentChannel> {
   return this.connection.request(request).then(formatResponse)
 }
 
-module.exports = getPaymentChannel
+export default getPaymentChannel
diff --git a/src/ledger/settings.js b/src/ledger/settings.js
index 760c4904..c63b30ca 100644
--- a/src/ledger/settings.js
+++ b/src/ledger/settings.js
@@ -1,10 +1,9 @@
 /* @flow */
-'use strict' // eslint-disable-line strict
-const _ = require('lodash')
-const utils = require('./utils')
-const parseFields = require('./parse/fields')
-const {validate} = utils.common
-const AccountFlags = utils.common.constants.AccountFlags
+
+import * as _ from 'lodash'
+import parseFields from './parse/fields'
+import {validate, constants} from '../common'
+const AccountFlags = constants.AccountFlags
 
 type SettingsOptions = {
   ledgerVersion?: number
@@ -59,4 +58,4 @@ function getSettings(address: string, options: SettingsOptions = {}
   return this.connection.request(request).then(formatSettings)
 }
 
-module.exports = getSettings
+export default getSettings
diff --git a/src/ledger/transaction-types.js b/src/ledger/transaction-types.js
index d80cda2c..bc30b91d 100644
--- a/src/ledger/transaction-types.js
+++ b/src/ledger/transaction-types.js
@@ -1,7 +1,7 @@
 /* @flow */
-'use strict' // eslint-disable-line strict
 
-import type {Amount, Memo} from '../common/types.js'
+
+import type {Amount, Memo} from '../common/types'
 
 type Outcome = {
   result: string,
diff --git a/src/ledger/transaction.js b/src/ledger/transaction.js
index 94c58db6..eef2e705 100644
--- a/src/ledger/transaction.js
+++ b/src/ledger/transaction.js
@@ -1,10 +1,10 @@
 /* @flow */
-'use strict' // eslint-disable-line strict
-const _ = require('lodash')
-const utils = require('./utils')
-const parseTransaction = require('./parse/transaction')
-const {validate, errors} = utils.common
-import type {Connection} from '../common/connection.js'
+
+import * as _ from 'lodash'
+import * as utils from './utils'
+import parseTransaction from './parse/transaction'
+import {validate, errors} from '../common'
+import type {Connection} from '../common'
 import type {TransactionType, TransactionOptions} from './transaction-types'
 
 function attachTransactionDate(connection: Connection, tx: Object
@@ -100,4 +100,4 @@ function getTransaction(id: string, options: TransactionOptions = {}
   })
 }
 
-module.exports = getTransaction
+export default getTransaction
diff --git a/src/ledger/transactions.js b/src/ledger/transactions.js
index af7691f3..841d8f81 100644
--- a/src/ledger/transactions.js
+++ b/src/ledger/transactions.js
@@ -1,14 +1,13 @@
 /* @flow */
-/* eslint-disable max-params */
-'use strict' // eslint-disable-line strict
-const _ = require('lodash')
-const binary = require('ripple-binary-codec')
-const {computeTransactionHash} = require('ripple-hashes')
-const utils = require('./utils')
-const parseTransaction = require('./parse/transaction')
-const getTransaction = require('./transaction')
-const {validate} = utils.common
-import type {Connection} from '../common/connection.js'
+
+import * as _ from 'lodash'
+import binary from 'ripple-binary-codec'
+import {computeTransactionHash} from 'ripple-hashes'
+import * as utils from './utils'
+import parseTransaction from './parse/transaction'
+import getTransaction from './transaction'
+import {validate, errors} from '../common'
+import type {Connection} from '../common'
 import type {TransactionType} from './transaction-types'
 
 
@@ -137,7 +136,7 @@ function checkForLedgerGaps(connection: Connection,
   return utils.hasCompleteLedgerRange(connection, minLedgerVersion,
     maxLedgerVersion).then(hasCompleteLedgerRange => {
     if (!hasCompleteLedgerRange) {
-      throw new utils.common.errors.MissingLedgerHistoryError()
+      throw new errors.MissingLedgerHistoryError()
     }
   })
 }
@@ -178,4 +177,4 @@ function getTransactions(address: string, options: TransactionsOptions = {}
   return getTransactionsInternal(this.connection, address, newOptions)
 }
 
-module.exports = getTransactions
+export default getTransactions
diff --git a/src/ledger/trustlines-types.js b/src/ledger/trustlines-types.js
index 809a91d8..fe24e45a 100644
--- a/src/ledger/trustlines-types.js
+++ b/src/ledger/trustlines-types.js
@@ -1,5 +1,5 @@
 /* @flow */
-'use strict' // eslint-disable-line strict
+
 
 export type TrustLineSpecification = {
   currency: string,
diff --git a/src/ledger/trustlines.js b/src/ledger/trustlines.js
index fe8c6630..63718025 100644
--- a/src/ledger/trustlines.js
+++ b/src/ledger/trustlines.js
@@ -1,11 +1,11 @@
 /* @flow */
-'use strict' // eslint-disable-line strict
-const _ = require('lodash')
-const utils = require('./utils')
-const {validate} = utils.common
-const parseAccountTrustline = require('./parse/account-trustline')
-import type {Connection} from '../common/connection.js'
-import type {TrustlinesOptions, Trustline} from './trustlines-types.js'
+
+import * as _ from 'lodash'
+import * as utils from './utils'
+import {validate} from '../common'
+import type {Connection} from '../common'
+import parseAccountTrustline from './parse/account-trustline'
+import type {TrustlinesOptions, Trustline} from './trustlines-types'
 
 
 type GetTrustlinesResponse = Array<Trustline>
@@ -49,4 +49,4 @@ function getTrustlines(address: string, options: TrustlinesOptions = {}
   })
 }
 
-module.exports = getTrustlines
+export default getTrustlines
diff --git a/src/ledger/types.js b/src/ledger/types.js
index 2a27698a..f35c03a8 100644
--- a/src/ledger/types.js
+++ b/src/ledger/types.js
@@ -1,7 +1,7 @@
 /* @flow */
-'use strict' // eslint-disable-line strict
 
-import type {Amount} from '../common/types.js'
+
+import type {Amount} from '../common/types'
 
 export type OrdersOptions = {
   limit?: number,
diff --git a/src/ledger/utils.js b/src/ledger/utils.js
index 6f6323a7..a8605289 100644
--- a/src/ledger/utils.js
+++ b/src/ledger/utils.js
@@ -1,12 +1,11 @@
 /* @flow */
-'use strict' // eslint-disable-line strict
-const _ = require('lodash')
-const assert = require('assert')
-const common = require('../common')
-const dropsToXrp = common.dropsToXrp
+
+import * as _ from 'lodash'
+import assert from 'assert'
+import * as common from '../common'
+import type {Connection} from '../common'
 import type {TransactionType} from './transaction-types'
-import type {Issue} from '../common/types.js'
-import type {Connection} from '../common/connection'
+import type {Issue} from '../common/types'
 
 type RecursiveData = {
   marker: string,
@@ -29,7 +28,7 @@ function getXRPBalance(connection: Connection, address: string,
     ledger_index: ledgerVersion
   }
   return connection.request(request).then(data =>
-    dropsToXrp(data.account_data.Balance))
+    common.dropsToXrp(data.account_data.Balance))
 }
 
 // If the marker is omitted from a response, you have reached the end
@@ -122,7 +121,7 @@ function ensureLedgerVersion(options: Object
     _.assign({}, options, {ledgerVersion}))
 }
 
-module.exports = {
+export {
   getXRPBalance,
   ensureLedgerVersion,
   compareTransactions,
@@ -130,6 +129,6 @@ module.exports = {
   getRecursive,
   hasCompleteLedgerRange,
   isPendingLedgerVersion,
-  clamp: clamp,
-  common: common
+  clamp,
+  common
 }
diff --git a/src/offline/generate-address.js b/src/offline/generate-address.js
index fd8dcb6b..b3701149 100644
--- a/src/offline/generate-address.js
+++ b/src/offline/generate-address.js
@@ -1,6 +1,7 @@
-'use strict' // eslint-disable-line strict
-const keypairs = require('ripple-keypairs')
-const common = require('../common')
+/* @flow */
+
+import keypairs from 'ripple-keypairs'
+import * as common from '../common'
 const {errors, validate} = common
 
 function generateAddress(options?: Object): Object {
@@ -19,6 +20,6 @@ function generateAddressAPI(options?: Object): Object {
   }
 }
 
-module.exports = {
+export {
   generateAddressAPI
 }
diff --git a/src/offline/ledgerhash.js b/src/offline/ledgerhash.js
index 39f0a2f0..2cfbff13 100644
--- a/src/offline/ledgerhash.js
+++ b/src/offline/ledgerhash.js
@@ -1,8 +1,8 @@
 /* @flow */
-'use strict' // eslint-disable-line strict
-const _ = require('lodash')
-const common = require('../common')
-const hashes = require('ripple-hashes')
+
+import * as _ from 'lodash'
+import * as common from '../common'
+import hashes from 'ripple-hashes'
 
 function convertLedgerHeader(header) {
   return {
@@ -71,4 +71,4 @@ function computeLedgerHash(ledger: Object): string {
   return hashLedgerHeader(_.assign({}, ledger, subhashes))
 }
 
-module.exports = computeLedgerHash
+export default computeLedgerHash
diff --git a/src/offline/sign-payment-channel-claim.js b/src/offline/sign-payment-channel-claim.js
index a0d91ad4..f892d4ab 100644
--- a/src/offline/sign-payment-channel-claim.js
+++ b/src/offline/sign-payment-channel-claim.js
@@ -1,8 +1,8 @@
 /* @flow */
-'use strict' // eslint-disable-line strict
-const common = require('../common')
-const keypairs = require('ripple-keypairs')
-const binary = require('ripple-binary-codec')
+
+import * as common from '../common'
+import keypairs from 'ripple-keypairs'
+import binary from 'ripple-binary-codec'
 const {validate, xrpToDrops} = common
 
 function signPaymentChannelClaim(channel: string, amount: string,
@@ -17,4 +17,4 @@ function signPaymentChannelClaim(channel: string, amount: string,
   return keypairs.sign(signingData, privateKey)
 }
 
-module.exports = signPaymentChannelClaim
+export default signPaymentChannelClaim
diff --git a/src/offline/verify-payment-channel-claim.js b/src/offline/verify-payment-channel-claim.js
index 75bfe4d1..ad2cd1d5 100644
--- a/src/offline/verify-payment-channel-claim.js
+++ b/src/offline/verify-payment-channel-claim.js
@@ -1,8 +1,8 @@
 /* @flow */
-'use strict' // eslint-disable-line strict
-const common = require('../common')
-const keypairs = require('ripple-keypairs')
-const binary = require('ripple-binary-codec')
+
+import * as common from '../common'
+import keypairs from 'ripple-keypairs'
+import binary from 'ripple-binary-codec'
 const {validate, xrpToDrops} = common
 
 function verifyPaymentChannelClaim(channel: string, amount: string,
@@ -17,4 +17,4 @@ function verifyPaymentChannelClaim(channel: string, amount: string,
   return keypairs.verify(signingData, signature, publicKey)
 }
 
-module.exports = verifyPaymentChannelClaim
+export default verifyPaymentChannelClaim
diff --git a/src/server/server.js b/src/server/server.js
index 0fe8ba85..61cc5da7 100644
--- a/src/server/server.js
+++ b/src/server/server.js
@@ -1,6 +1,6 @@
 /* @flow */
-'use strict' // eslint-disable-line strict
-const common = require('../common')
+
+import * as common from '../common'
 import type {GetServerInfoResponse} from '../common/serverinfo'
 
 function isConnected(): boolean {
@@ -41,7 +41,7 @@ function formatLedgerClose(ledgerClose: Object): Object {
   }
 }
 
-module.exports = {
+export {
   connect,
   disconnect,
   isConnected,
diff --git a/src/transaction/combine.js b/src/transaction/combine.js
index b782e6b9..3b6d41fd 100644
--- a/src/transaction/combine.js
+++ b/src/transaction/combine.js
@@ -1,12 +1,12 @@
 /* @flow */
-'use strict' // eslint-disable-line strict
-const _ = require('lodash')
-const binary = require('ripple-binary-codec')
-const utils = require('./utils')
-const BigNumber = require('bignumber.js')
-const {decodeAddress} = require('ripple-address-codec')
-const {validate} = utils.common
-const {computeBinaryTransactionHash} = require('ripple-hashes')
+
+import * as _ from 'lodash'
+import binary from 'ripple-binary-codec'
+import * as utils from './utils'
+import BigNumber from 'bignumber.js'
+import {decodeAddress} from 'ripple-address-codec'
+import {validate} from '../common'
+import {computeBinaryTransactionHash} from 'ripple-hashes'
 
 function addressToBigNumber(address) {
   const hex = (new Buffer(decodeAddress(address))).toString('hex')
@@ -36,4 +36,4 @@ function combine(signedTransactions: Array<string>): Object {
   return {signedTransaction, id}
 }
 
-module.exports = combine
+export default combine
diff --git a/src/transaction/escrow-cancellation.js b/src/transaction/escrow-cancellation.js
index 8b9c6ca0..8e965e2a 100644
--- a/src/transaction/escrow-cancellation.js
+++ b/src/transaction/escrow-cancellation.js
@@ -1,10 +1,10 @@
 /* @flow */
-'use strict' // eslint-disable-line strict
-const _ = require('lodash')
-const utils = require('./utils')
+
+import * as _ from 'lodash'
+import * as utils from './utils'
 const validate = utils.common.validate
-import type {Instructions, Prepare} from './types.js'
-import type {Memo} from '../common/types.js'
+import type {Instructions, Prepare} from './types'
+import type {Memo} from '../common/types'
 
 type EscrowCancellation = {
   owner: string,
@@ -38,4 +38,4 @@ function prepareEscrowCancellation(address: string,
   return utils.prepareTransaction(txJSON, this, instructions)
 }
 
-module.exports = prepareEscrowCancellation
+export default prepareEscrowCancellation
diff --git a/src/transaction/escrow-creation.js b/src/transaction/escrow-creation.js
index 71f36e52..18e891d3 100644
--- a/src/transaction/escrow-creation.js
+++ b/src/transaction/escrow-creation.js
@@ -1,11 +1,11 @@
 /* @flow */
-'use strict' // eslint-disable-line strict
-const _ = require('lodash')
-const utils = require('./utils')
-const {validate, iso8601ToRippleTime, xrpToDrops} = utils.common
+
+import * as _ from 'lodash'
+import * as utils from './utils'
+import {validate, iso8601ToRippleTime, xrpToDrops} from '../common'
 const ValidationError = utils.common.errors.ValidationError
-import type {Instructions, Prepare} from './types.js'
-import type {Memo} from '../common/types.js'
+import type {Instructions, Prepare} from './types'
+import type {Memo} from '../common/types'
 
 type EscrowCreation = {
   amount: string,
@@ -65,4 +65,4 @@ function prepareEscrowCreation(address: string,
   return utils.prepareTransaction(txJSON, this, instructions)
 }
 
-module.exports = prepareEscrowCreation
+export default prepareEscrowCreation
diff --git a/src/transaction/escrow-execution.js b/src/transaction/escrow-execution.js
index 93daa3df..09aac6b0 100644
--- a/src/transaction/escrow-execution.js
+++ b/src/transaction/escrow-execution.js
@@ -1,11 +1,11 @@
 /* @flow */
-'use strict' // eslint-disable-line strict
-const _ = require('lodash')
-const utils = require('./utils')
+
+import * as _ from 'lodash'
+import * as utils from './utils'
 const validate = utils.common.validate
 const ValidationError = utils.common.errors.ValidationError
-import type {Instructions, Prepare} from './types.js'
-import type {Memo} from '../common/types.js'
+import type {Instructions, Prepare} from './types'
+import type {Memo} from '../common/types'
 
 type EscrowExecution = {
   owner: string,
@@ -53,4 +53,4 @@ function prepareEscrowExecution(address: string,
   return utils.prepareTransaction(txJSON, this, instructions)
 }
 
-module.exports = prepareEscrowExecution
+export default prepareEscrowExecution
diff --git a/src/transaction/order.js b/src/transaction/order.js
index a7ba78c1..da2a7b4f 100644
--- a/src/transaction/order.js
+++ b/src/transaction/order.js
@@ -1,11 +1,11 @@
 /* @flow */
-'use strict' // eslint-disable-line strict
-const _ = require('lodash')
-const utils = require('./utils')
+
+import * as _ from 'lodash'
+import * as utils from './utils'
 const offerFlags = utils.common.txFlags.OfferCreate
-const {validate, iso8601ToRippleTime} = utils.common
-import type {Instructions, Prepare} from './types.js'
-import type {Order} from '../ledger/transaction-types.js'
+import {validate, iso8601ToRippleTime} from '../common'
+import type {Instructions, Prepare} from './types'
+import type {Order} from '../ledger/transaction-types'
 
 function createOrderTransaction(account: string, order: Order): Object {
   const takerPays = utils.common.toRippledAmount(order.direction === 'buy' ?
@@ -52,4 +52,4 @@ function prepareOrder(address: string, order: Order,
   return utils.prepareTransaction(txJSON, this, instructions)
 }
 
-module.exports = prepareOrder
+export default prepareOrder
diff --git a/src/transaction/ordercancellation.js b/src/transaction/ordercancellation.js
index aafc4923..c65ec97e 100644
--- a/src/transaction/ordercancellation.js
+++ b/src/transaction/ordercancellation.js
@@ -1,9 +1,9 @@
 /* @flow */
-'use strict' // eslint-disable-line strict
-const _ = require('lodash')
-const utils = require('./utils')
+
+import * as _ from 'lodash'
+import * as utils from './utils'
 const validate = utils.common.validate
-import type {Instructions, Prepare} from './types.js'
+import type {Instructions, Prepare} from './types'
 
 function createOrderCancellationTransaction(account: string,
   orderCancellation: Object
@@ -27,4 +27,4 @@ function prepareOrderCancellation(address: string, orderCancellation: Object,
   return utils.prepareTransaction(txJSON, this, instructions)
 }
 
-module.exports = prepareOrderCancellation
+export default prepareOrderCancellation
diff --git a/src/transaction/payment-channel-claim.js b/src/transaction/payment-channel-claim.js
index e970dc15..2f135741 100644
--- a/src/transaction/payment-channel-claim.js
+++ b/src/transaction/payment-channel-claim.js
@@ -1,10 +1,10 @@
 /* @flow */
-'use strict' // eslint-disable-line strict
-const utils = require('./utils')
+
+import * as utils from './utils'
 const ValidationError = utils.common.errors.ValidationError
 const claimFlags = utils.common.txFlags.PaymentChannelClaim
-const {validate, xrpToDrops} = utils.common
-import type {Instructions, Prepare} from './types.js'
+import {validate, xrpToDrops} from '../common'
+import type {Instructions, Prepare} from './types'
 
 type PaymentChannelClaim = {
   channel: string,
@@ -71,4 +71,4 @@ function preparePaymentChannelClaim(address: string,
   return utils.prepareTransaction(txJSON, this, instructions)
 }
 
-module.exports = preparePaymentChannelClaim
+export default preparePaymentChannelClaim
diff --git a/src/transaction/payment-channel-create.js b/src/transaction/payment-channel-create.js
index 4cdbfa71..bfc4a324 100644
--- a/src/transaction/payment-channel-create.js
+++ b/src/transaction/payment-channel-create.js
@@ -1,8 +1,8 @@
 /* @flow */
-'use strict' // eslint-disable-line strict
-const utils = require('./utils')
-const {validate, iso8601ToRippleTime, xrpToDrops} = utils.common
-import type {Instructions, Prepare} from './types.js'
+
+import * as utils from './utils'
+import {validate, iso8601ToRippleTime, xrpToDrops} from '../common'
+import type {Instructions, Prepare} from './types'
 
 type PaymentChannelCreate = {
   amount: string,
@@ -50,4 +50,4 @@ function preparePaymentChannelCreate(address: string,
   return utils.prepareTransaction(txJSON, this, instructions)
 }
 
-module.exports = preparePaymentChannelCreate
+export default preparePaymentChannelCreate
diff --git a/src/transaction/payment-channel-fund.js b/src/transaction/payment-channel-fund.js
index 68a30522..c9b151b7 100644
--- a/src/transaction/payment-channel-fund.js
+++ b/src/transaction/payment-channel-fund.js
@@ -1,8 +1,8 @@
 /* @flow */
-'use strict' // eslint-disable-line strict
-const utils = require('./utils')
-const {validate, iso8601ToRippleTime, xrpToDrops} = utils.common
-import type {Instructions, Prepare} from './types.js'
+
+import * as utils from './utils'
+import {validate, iso8601ToRippleTime, xrpToDrops} from '../common'
+import type {Instructions, Prepare} from './types'
 
 type PaymentChannelFund = {
   channel: string,
@@ -38,4 +38,4 @@ function preparePaymentChannelFund(address: string,
   return utils.prepareTransaction(txJSON, this, instructions)
 }
 
-module.exports = preparePaymentChannelFund
+export default preparePaymentChannelFund
diff --git a/src/transaction/payment.js b/src/transaction/payment.js
index b070cad4..e7bec86c 100644
--- a/src/transaction/payment.js
+++ b/src/transaction/payment.js
@@ -1,14 +1,14 @@
 /* @flow */
-'use strict' // eslint-disable-line strict
-const _ = require('lodash')
-const utils = require('./utils')
+
+import * as _ from 'lodash'
+import * as utils from './utils'
 const validate = utils.common.validate
 const toRippledAmount = utils.common.toRippledAmount
 const paymentFlags = utils.common.txFlags.Payment
 const ValidationError = utils.common.errors.ValidationError
-import type {Instructions, Prepare} from './types.js'
+import type {Instructions, Prepare} from './types'
 import type {Amount, Adjustment, MaxAdjustment,
-  MinAdjustment, Memo} from '../common/types.js'
+  MinAdjustment, Memo} from '../common/types'
 
 
 type Payment = {
@@ -153,4 +153,4 @@ function preparePayment(address: string, payment: Payment,
   return utils.prepareTransaction(txJSON, this, instructions)
 }
 
-module.exports = preparePayment
+export default preparePayment
diff --git a/src/transaction/settings.js b/src/transaction/settings.js
index 419f1881..4fd9c690 100644
--- a/src/transaction/settings.js
+++ b/src/transaction/settings.js
@@ -1,13 +1,13 @@
 /* @flow */
-'use strict' // eslint-disable-line strict
-const _ = require('lodash')
-const assert = require('assert')
-const BigNumber = require('bignumber.js')
-const utils = require('./utils')
+
+import * as _ from 'lodash'
+import assert from 'assert'
+import BigNumber from 'bignumber.js'
+import * as utils from './utils'
 const validate = utils.common.validate
 const AccountFlagIndices = utils.common.constants.AccountFlagIndices
 const AccountFields = utils.common.constants.AccountFields
-import type {Instructions, Prepare} from './types.js'
+import type {Instructions, Prepare} from './types'
 
 type Settings = {
   passwordSpent?: boolean,
@@ -152,4 +152,4 @@ function prepareSettings(address: string, settings: Settings,
   return utils.prepareTransaction(txJSON, this, instructions)
 }
 
-module.exports = prepareSettings
+export default prepareSettings
diff --git a/src/transaction/sign.js b/src/transaction/sign.js
index 3eb0f0c2..efbc3ac5 100644
--- a/src/transaction/sign.js
+++ b/src/transaction/sign.js
@@ -1,9 +1,9 @@
 /* @flow */
-'use strict' // eslint-disable-line strict
-const utils = require('./utils')
-const keypairs = require('ripple-keypairs')
-const binary = require('ripple-binary-codec')
-const {computeBinaryTransactionHash} = require('ripple-hashes')
+
+import * as utils from './utils'
+import keypairs from 'ripple-keypairs'
+import binary from 'ripple-binary-codec'
+import {computeBinaryTransactionHash} from 'ripple-hashes'
 const validate = utils.common.validate
 
 function computeSignature(tx: Object, privateKey: string, signAs: ?string) {
@@ -45,4 +45,4 @@ function sign(txJSON: string, secret: string, options: Object = {}
   }
 }
 
-module.exports = sign
+export default sign
diff --git a/src/transaction/submit.js b/src/transaction/submit.js
index 53d2030c..db86c832 100644
--- a/src/transaction/submit.js
+++ b/src/transaction/submit.js
@@ -1,9 +1,9 @@
 /* @flow */
-'use strict' // eslint-disable-line strict
-const _ = require('lodash')
-const utils = require('./utils')
-const {validate} = utils.common
-import type {Submit} from './types.js'
+
+import * as _ from 'lodash'
+import * as utils from './utils'
+import {validate} from '../common'
+import type {Submit} from './types'
 
 function isImmediateRejection(engineResult: string): boolean {
   // note: "tel" errors mean the local server refused to process the
@@ -36,4 +36,4 @@ function submit(signedTransaction: string): Promise<Submit> {
   return this.connection.request(request).then(formatSubmitResponse)
 }
 
-module.exports = submit
+export default submit
diff --git a/src/transaction/trustline.js b/src/transaction/trustline.js
index d0642c6f..b5ab1e34 100644
--- a/src/transaction/trustline.js
+++ b/src/transaction/trustline.js
@@ -1,12 +1,12 @@
 /* @flow */
-'use strict' // eslint-disable-line strict
-const _ = require('lodash')
-const utils = require('./utils')
+
+import * as _ from 'lodash'
+import BigNumber from 'bignumber.js'
+import * as utils from './utils'
 const validate = utils.common.validate
 const trustlineFlags = utils.common.txFlags.TrustSet
-const BigNumber = require('bignumber.js')
-import type {Instructions, Prepare} from './types.js'
-import type {TrustLineSpecification} from '../ledger/trustlines-types.js'
+import type {Instructions, Prepare} from './types'
+import type {TrustLineSpecification} from '../ledger/trustlines-types'
 
 function convertQuality(quality) {
   return (new BigNumber(quality)).shift(9).truncated().toNumber()
@@ -58,4 +58,4 @@ function prepareTrustline(address: string,
   return utils.prepareTransaction(txJSON, this, instructions)
 }
 
-module.exports = prepareTrustline
+export default prepareTrustline
diff --git a/src/transaction/types.js b/src/transaction/types.js
index 9469f2d9..7cae27aa 100644
--- a/src/transaction/types.js
+++ b/src/transaction/types.js
@@ -1,5 +1,5 @@
 /* @flow */
-'use strict' // eslint-disable-line strict
+
 
 export type Instructions = {
   sequence?: number,
diff --git a/src/transaction/utils.js b/src/transaction/utils.js
index 8ef4550b..f937e0a2 100644
--- a/src/transaction/utils.js
+++ b/src/transaction/utils.js
@@ -1,10 +1,10 @@
 /* @flow */
-'use strict' // eslint-disable-line strict
-const _ = require('lodash')
-const BigNumber = require('bignumber.js')
-const common = require('../common')
+
+import * as _ from 'lodash'
+import BigNumber from 'bignumber.js'
+import * as common from '../common'
 const txFlags = common.txFlags
-import type {Instructions, Prepare} from './types.js'
+import type {Instructions, Prepare} from './types'
 
 function formatPrepareResponse(txJSON: Object): Object {
   const instructions = {
@@ -119,7 +119,7 @@ function convertMemo(memo: Object): Object {
   }
 }
 
-module.exports = {
+export {
   convertStringToHex,
   convertMemo,
   prepareTransaction,