Setup gradual process for migrating to Typescript

.prettierignore

@@ -0,0 +1,6 @@
+node_modules
+.vscode
+package.json
+dist
+.nyc_output
+*.json

lib/bloom/index.js → lib/bloom/index.ts

@@ -1,17 +1,19 @@
-const assert = require('assert')
-const utils = require('ethereumjs-util')
+import * as assert from 'assert'
+import { zeros, keccak256 } from 'ethereumjs-util'
 
 const BYTE_SIZE = 256
 
-module.exports = class Bloom {
+export default class Bloom {
+  bitvector: Buffer
+
   /**
    * Represents a Bloom
    * @constructor
    * @param {Buffer} bitvector
    */
-  constructor (bitvector) {
+  constructor (bitvector: Buffer) {
     if (!bitvector) {
-      this.bitvector = utils.zeros(BYTE_SIZE)
+      this.bitvector = zeros(BYTE_SIZE)
     } else {
       assert(bitvector.length === BYTE_SIZE, 'bitvectors must be 2048 bits long')
       this.bitvector = bitvector
@@ -21,10 +23,11 @@ module.exports = class Bloom {
   /**
    * adds an element to a bit vector of a 64 byte bloom filter
    * @method add
-   * @param {Buffer|Array|String|Number} e the element to add
+   * @param {Buffer} e the element to add
    */
-  add (e) {
-    e = utils.keccak256(e)
+  add (e: Buffer) {
+    assert(Buffer.isBuffer(e), 'Element should be buffer')
+    e = keccak256(e)
     const mask = 2047 // binary 11111111111
 
     for (let i = 0; i < 3; i++) {
@@ -39,11 +42,12 @@ module.exports = class Bloom {
   /**
    * checks if an element is in the bloom
    * @method check
-   * @param {Buffer|Array|String|Number} e the element to check
+   * @param {Buffer} e the element to check
    * @returns {boolean} Returns {@code true} if the element is in the bloom
    */
-  check (e) {
-    e = utils.keccak256(e)
+  check (e: Buffer): boolean {
+    assert(Buffer.isBuffer(e), 'Element should be Buffer')
+    e = keccak256(e)
     const mask = 2047 // binary 11111111111
     let match = true
 
@@ -52,7 +56,7 @@ module.exports = class Bloom {
       const loc = mask & first2bytes
       const byteLoc = loc >> 3
       const bitLoc = 1 << loc % 8
-      match = (this.bitvector[BYTE_SIZE - byteLoc - 1] & bitLoc)
+      match = (this.bitvector[BYTE_SIZE - byteLoc - 1] & bitLoc) !== 0
     }
 
     return Boolean(match)
@@ -61,19 +65,19 @@ module.exports = class Bloom {
   /**
    * checks if multiple topics are in a bloom
    * @method multiCheck
-   * @param {Buffer[]|Array[]|String[]|Number[]} topics
+   * @param {Buffer[]} topics
    * @returns {boolean} Returns {@code true} if every topic is in the bloom
    */
-  multiCheck (topics) {
-    return topics.every((t) => this.check(t))
+  multiCheck (topics: Buffer[]): boolean {
+    return topics.every((t: Buffer) => this.check(t))
   }
 
   /**
    * bitwise or blooms together
    * @method or
    * @param {Bloom} bloom
    */
-  or (bloom) {
+  or (bloom: Bloom) {
     if (bloom) {
       for (let i = 0; i <= BYTE_SIZE; i++) {
         this.bitvector[i] = this.bitvector[i] | bloom.bitvector[i]

lib/evm/loop.js

@@ -4,8 +4,8 @@ const utils = require('ethereumjs-util')
 const { StorageReader } = require('../state')
 const PStateManager = require('../state/promisified')
 const { ERROR, VmError } = require('../exceptions')
-const Memory = require('./memory')
-const Stack = require('./stack')
+const Memory = require('./memory').default
+const Stack = require('./stack').default
 const EEI = require('./eei')
 const lookupOpInfo = require('./opcodes.js')
 const opFns = require('./opFns.js')

lib/evm/memory.js → lib/evm/memory.ts

@@ -1,8 +1,12 @@
+import * as assert from 'assert'
+
 /**
  * Memory implements a simple memory model
  * for the ethereum virtual machine.
  */
-module.exports = class Memory {
+export default class Memory {
+  _store: number[]
+
   constructor () {
     this._store = []
   }
@@ -11,9 +15,9 @@ module.exports = class Memory {
    * Extends the memory given an offset and size. Rounds extended
    * memory to word-size.
    * @param {Number} offset
-   * @param {size} size
+   * @param {Number} size
    */
-  extend (offset, size) {
+  extend (offset: number, size: number) {
     if (size === 0) {
       return
     }
@@ -31,18 +35,14 @@ module.exports = class Memory {
    * @param {Number} size - How many bytes to write
    * @param {Buffer} value - Value
    */
-  write (offset, size, value) {
+  write (offset: number, size: number, value: Buffer) {
     if (size === 0) {
       return
     }
 
-    if (value.length !== size) {
-      throw new Error('Invalid value size')
-    }
-
-    if (offset + size > this._store.length) {
-      throw new Error('Value exceeds memory capacity')
-    }
+    assert(value.length === size, 'Invalid value size')
+    assert(offset + size <= this._store.length, 'Value exceeds memory capacity')
+    assert(Buffer.isBuffer(value), 'Invalid value type')
 
     for (let i = 0; i < size; i++) {
       this._store[offset + i] = value[i]
@@ -56,7 +56,7 @@ module.exports = class Memory {
    * @param {Number} size - How many bytes to read
    * @returns {Buffer}
    */
-  read (offset, size) {
+  read (offset: number, size: number): Buffer {
     const loaded = this._store.slice(offset, offset + size)
     // Fill the remaining length with zeros
     for (let i = loaded.length; i < size; i++) {
@@ -66,7 +66,7 @@ module.exports = class Memory {
   }
 }
 
-const ceil = (value, ceiling) => {
+const ceil = (value: number, ceiling: number): number => {
   const r = value % ceiling
   if (r === 0) {
     return value

lib/evm/stack.js → lib/evm/stack.ts

@@ -1,11 +1,13 @@
-const BN = require('bn.js')
-const ethUtil = require('ethereumjs-util')
+import BN = require('bn.js')
+import { MAX_INTEGER } from 'ethereumjs-util'
 const { ERROR, VmError } = require('../exceptions')
 
 /**
  * Implementation of the stack used in evm.
  */
-module.exports = class Stack {
+export default class Stack {
+  _store: BN[]
+
   constructor () {
     this._store = []
   }
@@ -14,24 +16,29 @@ module.exports = class Stack {
     return this._store.length
   }
 
-  push (value) {
-    if (this._store.length > 1023) {
-      throw new VmError(ERROR.STACK_OVERFLOW)
+  push (value: BN) {
+    if (!BN.isBN(value)) {
+      throw new VmError(ERROR.INTERNAL_ERROR)
     }
 
-    if (!this._isValidValue(value)) {
+    if (value.gt(MAX_INTEGER)) {
       throw new VmError(ERROR.OUT_OF_RANGE)
     }
 
+    if (this._store.length > 1023) {
+      throw new VmError(ERROR.STACK_OVERFLOW)
+    }
+
     this._store.push(value)
   }
 
-  pop () {
+  pop (): BN {
     if (this._store.length < 1) {
       throw new VmError(ERROR.STACK_UNDERFLOW)
     }
 
-    return this._store.pop()
+    // Length is checked above, so pop shouldn't return undefined
+    return this._store.pop()!
   }
 
   /**
@@ -40,7 +47,7 @@ module.exports = class Stack {
    * @param {Number} num - Number of items to pop
    * @returns {Array}
    */
-  popN (num = 1) {
+  popN (num: number = 1): BN[] {
     if (this._store.length < num) {
       throw new VmError(ERROR.STACK_UNDERFLOW)
     }
@@ -56,7 +63,7 @@ module.exports = class Stack {
    * Swap top of stack with an item in the stack.
    * @param {Number} position - Index of item from top of the stack (0-indexed)
    */
-  swap (position) {
+  swap (position: number) {
     if (this._store.length <= position) {
       throw new VmError(ERROR.STACK_UNDERFLOW)
     }
@@ -73,26 +80,12 @@ module.exports = class Stack {
    * Pushes a copy of an item in the stack.
    * @param {Number} position - Index of item to be copied (1-indexed)
    */
-  dup (position) {
+  dup (position: number) {
     if (this._store.length < position) {
       throw new VmError(ERROR.STACK_UNDERFLOW)
     }
 
     const i = this._store.length - position
     this.push(this._store[i])
   }
-
-  _isValidValue (value) {
-    if (BN.isBN(value)) {
-      if (value.lte(ethUtil.MAX_INTEGER)) {
-        return true
-      }
-    } else if (Buffer.isBuffer(value)) {
-      if (value.length <= 32) {
-        return true
-      }
-    }
-
-    return false
-  }
 }

lib/runBlock.js

@@ -1,6 +1,6 @@
 const promisify = require('util.promisify')
 const ethUtil = require('ethereumjs-util')
-const Bloom = require('./bloom')
+const Bloom = require('./bloom').default
 const rlp = ethUtil.rlp
 const Trie = require('merkle-patricia-tree')
 const BN = ethUtil.BN

lib/runTx.js

@@ -1,6 +1,6 @@
 const utils = require('ethereumjs-util')
 const BN = utils.BN
-const Bloom = require('./bloom')
+const Bloom = require('./bloom').default
 const Block = require('ethereumjs-block')
 const Account = require('ethereumjs-account')
 const Interpreter = require('./evm/interpreter')

lib/state/stateManager.js

@@ -1,4 +1,4 @@
-const Buffer = require('safe-buffer').Buffer
+const Set = require('core-js-pure/es/set')
 const Trie = require('merkle-patricia-tree/secure.js')
 const Common = require('ethereumjs-common').default
 const { genesisStateByName } = require('ethereumjs-common/dist/genesisStates')
@@ -281,7 +281,7 @@ module.exports = class StateManager {
   checkpoint (cb) {
     this._trie.checkpoint()
     this._cache.checkpoint()
-    this._touchedStack.push(new Set([...this._touched]))
+    this._touchedStack.push(new Set(Array.from(this._touched)))
     this._checkpointCount++
     cb()
   }

package.json

@@ -8,7 +8,7 @@
   ],
   "scripts": {
     "coverage": "nyc npm run coverageTests && nyc report --reporter=text-lcov > .nyc_output/lcov.info",
-    "coverageTests": "tape './tests/api/**/*.js' ./tests/tester.js -s",
+    "coverageTests": "npm run build:dist && tape './tests/api/**/*.js' ./tests/tester.js -s --dist",
     "coveralls": "npm run coverage && if [ -n \"$COVERALLS_REPO_TOKEN\" ]; then coveralls <.nyc_output/lcov.info; fi",
     "testVM": "node ./tests/tester -v",
     "testStateByzantium": "npm run build:dist && node ./tests/tester -s --fork='Byzantium' --dist",
@@ -17,12 +17,14 @@
     "testBuildIntegrity": "npm run build:dist && node ./tests/tester -s --dist --test='stackOverflow'",
     "testBlockchain": "npm run build:dist && node --stack-size=1500 ./tests/tester -b --fork='Petersburg' --dist --excludeDir='GeneralStateTests'",
     "testBlockchainGeneralStateTests": "npm run build:dist && node --stack-size=1500 ./tests/tester -b --dist --dir='GeneralStateTests'",
-    "testAPI": "tape './tests/api/**/*.js'",
-    "testAPI:browser": "karma start karma.conf.js",
+    "testAPI": "npm run build:dist && tape './tests/api/**/*.js'",
+    "testAPI:browser": "npm run build:dist && karma start karma.conf.js",
     "test": "echo \"[INFO] Generic test cmd not used. See package.json for more specific test run cmds.\"",
     "lint": "standard",
+    "format": "ethereumjs-config-format",
+    "format-fix": "ethereumjs-config-format-fix",
     "prepublishOnly": "npm run lint && npm run build:dist && npm run testBuildIntegrity",
-    "build:dist": "babel lib/ -d dist/",
+    "build:dist": "tsc",
     "build:docs": "documentation build ./lib/index.js ./lib/runBlockchain.js ./lib/runBlock.js ./lib/runTx.js ./lib/runCode.js ./lib/runCall.js --format md --shallow > ./docs/index.md",
     "formatTest": "node ./scripts/formatTest"
   },
@@ -35,14 +37,14 @@
     "VM"
   ],
   "dependencies": {
-    "@babel/runtime": "^7.4.0",
     "async": "^2.1.2",
     "async-eventemitter": "^0.2.2",
+    "core-js-pure": "^3.0.1",
     "ethereumjs-account": "^2.0.3",
     "ethereumjs-block": "~2.2.0",
     "ethereumjs-blockchain": "^3.4.0",
     "ethereumjs-common": "^1.1.0",
-    "ethereumjs-util": "^6.0.0",
+    "ethereumjs-util": "^6.1.0",
     "fake-merkle-patricia-tree": "^1.0.1",
     "functional-red-black-tree": "^1.0.1",
     "merkle-patricia-tree": "^2.3.2",
@@ -51,10 +53,9 @@
     "util.promisify": "^1.0.0"
   },
   "devDependencies": {
-    "@babel/cli": "^7.2.3",
-    "@babel/core": "^7.4.0",
-    "@babel/plugin-transform-runtime": "^7.4.0",
-    "@babel/preset-env": "^7.4.1",
+    "@ethereumjs/config-prettier": "^1.1.1",
+    "@types/bn.js": "^4.11.5",
+    "@types/node": "^11.13.4",
     "browserify": "^16.2.3",
     "coveralls": "^3.0.0",
     "documentation": "^8.1.2",
@@ -70,9 +71,12 @@
     "level-mem": "^3.0.1",
     "minimist": "^1.1.1",
     "nyc": "^12.0.2",
+    "prettier": "^1.16.4",
+    "rlp": "^2.2.3",
     "standard": "^10.0.0",
     "tap-spec": "^5.0.0",
-    "tape": "4.6.3"
+    "tape": "4.6.3",
+    "typescript": "^3.4.3"
   },
   "author": "mjbecze <mjbecze@gmail.com>",
   "contributors": [