clean up require usage

Author: ryanio

src/account.ts

@@ -1,20 +1,19 @@
 import assert from 'assert'
 import BN from 'bn.js'
 import * as rlp from 'rlp'
+import {
+  privateKeyVerify,
+  publicKeyCreate,
+  publicKeyVerify,
+  publicKeyConvert
+} from 'ethereum-cryptography/secp256k1'
 import { stripHexPrefix } from 'ethjs-util'
 import { KECCAK256_RLP, KECCAK256_NULL } from './constants'
 import { zeros, bufferToHex, toBuffer } from './bytes'
 import { keccak, keccak256, keccakFromString, rlphash } from './hash'
 import { assertIsHexString, assertIsBuffer } from './helpers'
 import { BNLike, BufferLike, bnToRlp, toType, TypeOutput } from './types'
 
-const {
-  privateKeyVerify,
-  publicKeyCreate,
-  publicKeyVerify,
-  publicKeyConvert
-} = require('ethereum-cryptography/secp256k1')
-
 export interface AccountData {
   nonce?: BNLike
   balance?: BNLike

src/address.ts

@@ -1,5 +1,5 @@
-const assert = require('assert')
-import BN = require('bn.js')
+import assert from 'assert'
+import BN from 'bn.js'
 import { toBuffer, zeros } from './bytes'
 import {
   isValidAddress,

src/externals.ts

@@ -4,11 +4,8 @@
  * @packageDocumentation
  */
 
-// TODO: This can be replaced with a normal ESM import once
-// the new major version of the typescript config package
-// is released and adopted here.
-import BN = require('bn.js')
-import rlp = require('rlp')
+import BN from 'bn.js'
+import * as rlp from 'rlp'
 
 /**
  * [`BN`](https://github.com/indutny/bn.js)

src/hash.ts

@@ -1,4 +1,4 @@
-const { keccak224, keccak384, keccak256: k256, keccak512 } = require('ethereum-cryptography/keccak')
+import { keccak224, keccak384, keccak256 as k256, keccak512 } from 'ethereum-cryptography/keccak'
 const createHash = require('create-hash')
 import * as rlp from 'rlp'
 import { toBuffer, setLengthLeft } from './bytes'