Extend burner wallet plugin with support of erc-to-native mediator (#378)

burner-wallet-plugin/testing/package.json

@@ -16,8 +16,7 @@
     "react": "^16.8.6",
     "react-dom": "^16.8.6",
     "react-scripts": "3.0.1",
-    "typescript": "3.5.1",
+    "typescript": "3.5.1"
-    "web3": "1.0.0-beta.55"
   },
   "scripts": {
     "start": "react-scripts start",

burner-wallet-plugin/testing/src/LocalhostGateway.ts

@@ -0,0 +1,53 @@
+import { Gateway } from '@burner-wallet/core/gateways'
+import Web3 from 'web3'
+
+export default class LocalhostGateway extends Gateway {
+  private readonly providers: object
+  private readonly providerStrings: { [id: string]: string }
+  constructor() {
+    super()
+    this.providerStrings = {
+      '111': 'http://localhost:8545',
+      '1337': 'http://localhost:8546'
+    }
+    this.providers = {}
+  }
+
+  isAvailable() {
+    return true
+  }
+
+  getNetworks() {
+    return ['111', '1337']
+  }
+
+  _provider(network) {
+    if (!this.providers[network]) {
+      this._makeProvider(network)
+    }
+    return this.providers[network]
+  }
+
+  _makeProvider(network) {
+    if (!this.providerStrings[network]) {
+      throw new Error(`Network ${network} not supported by LocalhostGateway`)
+    }
+
+    this.providers[network] = new Web3.providers.HttpProvider(this.providerStrings[network])
+  }
+
+  send(network, payload) {
+    return new Promise((resolve, reject) => {
+      if (this.getNetworks().indexOf(network) === -1) {
+        return reject(new Error('LocalhostGateway does not support this network'))
+      }
+
+      this._provider(network).send(payload, (err, response) => {
+        if (err) {
+          return reject(err)
+        }
+        return resolve(response.result)
+      })
+    })
+  }
+}

burner-wallet-plugin/testing/src/index.tsx

@@ -6,13 +6,23 @@ import { InjectedSigner, LocalSigner } from '@burner-wallet/core/signers'
 import { InfuraGateway, InjectedGateway } from '@burner-wallet/core/gateways'
 import ModernUI from '@burner-wallet/modern-ui'
 import Exchange from '@burner-wallet/exchange'
-import { Mediator, sPOA, ERC677Asset, TokenBridgeGateway } from '@poanet/tokenbridge-bw-exchange'
+import {
+  Mediator,
+  sPOA,
+  ERC677Asset,
+  TokenBridgeGateway,
+  NativeMediatorAsset,
+  MediatorErcToNative,
+  BridgeableERC20Asset
+} from '@poanet/tokenbridge-bw-exchange'
 import MetamaskPlugin from '@burner-wallet/metamask-plugin'
+import LocalhostGateway from './LocalhostGateway'
 
 let assetIdAtHome = 'assetAtHome'
 const assetIdAtForeign = 'assetAtForeign'
 let assetAtHome: Asset
 let assetAtForeign: Asset
+let testBridge: Mediator
 
 if (process.env.REACT_APP_MODE === 'AMB_NATIVE_TO_ERC677') {
   sPOA.setMediatorAddress(process.env.REACT_APP_HOME_MEDIATOR_ADDRESS)
@@ -28,8 +38,16 @@ if (process.env.REACT_APP_MODE === 'AMB_NATIVE_TO_ERC677') {
     // @ts-ignore
     address: process.env.REACT_APP_FOREIGN_TOKEN_ADDRESS
   })
-} else {
+
-  // process.env.REACT_APP_MODE === 'AMB_ERC677_TO_ERC677'
+  testBridge = new Mediator({
+    assetA: assetIdAtHome,
+    // @ts-ignore
+    assetABridge: process.env.REACT_APP_HOME_MEDIATOR_ADDRESS,
+    assetB: assetIdAtForeign,
+    // @ts-ignore
+    assetBBridge: process.env.REACT_APP_FOREIGN_MEDIATOR_ADDRESS
+  })
+} else if (process.env.REACT_APP_MODE === 'AMB_ERC677_TO_ERC677') {
   assetAtHome = new ERC677Asset({
     id: 'assetAtHome',
     // @ts-ignore
@@ -49,9 +67,8 @@ if (process.env.REACT_APP_MODE === 'AMB_NATIVE_TO_ERC677') {
     // @ts-ignore
     address: process.env.REACT_APP_FOREIGN_TOKEN_ADDRESS
   })
-}
 
-const testBridge = new Mediator({
+  testBridge = new Mediator({
     assetA: assetIdAtHome,
     // @ts-ignore
     assetABridge: process.env.REACT_APP_HOME_MEDIATOR_ADDRESS,
@@ -59,10 +76,45 @@ const testBridge = new Mediator({
     // @ts-ignore
     assetBBridge: process.env.REACT_APP_FOREIGN_MEDIATOR_ADDRESS
   })
+} else {
+  // process.env.REACT_APP_MODE === 'AMB_ERC20_TO_NATIVE'
+  assetAtHome = new NativeMediatorAsset({
+    id: assetIdAtHome,
+    name: 'qDAI',
+    network: process.env.REACT_APP_HOME_NETWORK as string,
+    mediatorAddress: process.env.REACT_APP_HOME_MEDIATOR_ADDRESS
+  })
+
+  assetAtForeign = new BridgeableERC20Asset({
+    id: 'assetAtForeign',
+    // @ts-ignore
+    name: process.env.REACT_APP_FOREIGN_TOKEN_NAME,
+    // @ts-ignore
+    network: process.env.REACT_APP_FOREIGN_NETWORK,
+    // @ts-ignore
+    address: process.env.REACT_APP_FOREIGN_TOKEN_ADDRESS,
+    // @ts-ignore
+    bridgeAddress: process.env.REACT_APP_FOREIGN_MEDIATOR_ADDRESS
+  })
+
+  testBridge = new MediatorErcToNative({
+    assetA: assetIdAtHome,
+    // @ts-ignore
+    assetABridge: process.env.REACT_APP_HOME_MEDIATOR_ADDRESS,
+    assetB: assetIdAtForeign,
+    // @ts-ignore
+    assetBBridge: process.env.REACT_APP_FOREIGN_MEDIATOR_ADDRESS
+  })
+}
 
 const core = new BurnerCore({
   signers: [new InjectedSigner(), new LocalSigner({ privateKey: process.env.REACT_APP_PK, saveKey: false })],
-  gateways: [new InjectedGateway(), new TokenBridgeGateway(), new InfuraGateway(process.env.REACT_APP_INFURA_KEY)],
+  gateways: [
+    new InjectedGateway(),
+    new LocalhostGateway(),
+    new TokenBridgeGateway(),
+    new InfuraGateway(process.env.REACT_APP_INFURA_KEY)
+  ],
   assets: [assetAtHome, assetAtForeign]
 })
 

burner-wallet-plugin/testing/tsconfig.json

@@ -17,6 +17,7 @@
     "resolveJsonModule": true,
     "isolatedModules": true,
     "noEmit": true,
+    "noImplicitAny": false,
     "jsx": "preserve"
   },
   "include": [

burner-wallet-plugin/tokenbridge-bw-exchange/src/burner-wallet/assets/BridgeableERC20Asset.ts

@@ -0,0 +1,51 @@
+import { ERC20Asset } from '@burner-wallet/assets'
+import { MEDIATOR_ABI, constants } from '../../utils'
+import { toBN } from 'web3-utils'
+
+interface BridgeableERC20Constructor {
+  abi?: object
+  address: string
+  id: string
+  name: string
+  network: string
+  bridgeAddress: string
+}
+
+export default class BridgeableERC20Asset extends ERC20Asset {
+  protected bridgeAddress: string
+  private _bridge
+
+  constructor({ bridgeAddress, ...params }: BridgeableERC20Constructor) {
+    super({ ...params })
+    this.bridgeAddress = bridgeAddress.toLowerCase()
+  }
+
+  getBridgeContract() {
+    if (!this._bridge) {
+      const Contract = this.getWeb3().eth.Contract
+      this._bridge = new Contract(MEDIATOR_ABI, this.bridgeAddress)
+    }
+    return this._bridge
+  }
+
+  async _send({ from, to, value }) {
+    if (to.toLowerCase() === this.bridgeAddress) {
+      const allowance = await this.allowance(from, to)
+      if (toBN(allowance).lt(toBN(value))) {
+        await this.approve(from, to, value)
+      }
+      const receipt = await this.getBridgeContract()
+        .methods.relayTokens(from, value)
+        .send({ from })
+      const transferLog = Object.values(receipt.events as object).find(
+        e => e.raw.topics[0] === constants.TRANSFER_TOPIC
+      )
+      return {
+        ...receipt,
+        txHash: receipt.transactionHash,
+        id: `${receipt.transactionHash}-${transferLog.logIndex}`
+      }
+    }
+    return super._send({ from, to, value })
+  }
+}

burner-wallet-plugin/tokenbridge-bw-exchange/src/burner-wallet/assets/ERC677Asset.ts

@@ -1,7 +1,6 @@
 import { ERC20Asset } from '@burner-wallet/assets'
-import { ERC677_ABI } from '../../utils'
+import { ERC677_ABI, constants } from '../../utils'
 
-const TRANSFER_TOPIC = '0xddf252ad1be2c89b69c2b068fc378daa952ba7f163c4a11628f55a4df523b3ef'
 const BLOCK_LOOKBACK = 250
 
 interface ERC677Constructor {
@@ -45,7 +44,7 @@ export default class ERC677Asset extends ERC20Asset {
       const allTransferEvents = await this.getContract().getPastEvents('allEvents', {
         fromBlock: block,
         toBlock: currentBlock,
-        topics: [TRANSFER_TOPIC]
+        topics: [constants.TRANSFER_TOPIC]
       })
       // Manually filter `to` parameter because `filter` option does not work with allEvents
       const events = allTransferEvents.filter(e => e.returnValues.to.toLowerCase() === address.toLowerCase())

burner-wallet-plugin/tokenbridge-bw-exchange/src/burner-wallet/index.ts

@@ -2,6 +2,8 @@ export { default as sPOA } from './assets/sPOA'
 export { default as Etc } from './assets/Etc'
 export { default as Wetc } from './assets/Wetc'
 export { default as ERC677Asset } from './assets/ERC677Asset'
+export { default as BridgeableERC20Asset } from './assets/BridgeableERC20Asset'
 export { default as NativeMediatorAsset } from './assets/NativeMediatorAsset'
 export { default as TokenBridgeGateway } from './gateways/TokenBridgeGateway'
 export { default as Mediator } from './pairs/Mediator'
+export { default as MediatorErcToNative } from './pairs/MediatorErcToNative'

burner-wallet-plugin/tokenbridge-bw-exchange/src/burner-wallet/pairs/MediatorErcToNative.ts

@@ -0,0 +1,48 @@
+import BN from 'bn.js'
+import { EstimateReturn, ValueTypes } from '@burner-wallet/exchange'
+import { constants } from '../../utils'
+import { MEDIATOR_ERC_TO_NATIVE_ABI } from '../../utils'
+import { default as Mediator } from './Mediator'
+import { fromWei, toBN } from 'web3-utils'
+
+export default class MediatorErcToNative extends Mediator {
+  constructor(params) {
+    super(params)
+  }
+
+  async estimateAtoB(value: ValueTypes): Promise<EstimateReturn> {
+    return this.estimateWithFee(constants.HOME_TO_FOREIGN_FEE_TYPE, value)
+  }
+
+  async estimateBtoA(value: ValueTypes): Promise<EstimateReturn> {
+    return this.estimateWithFee(constants.FOREIGN_TO_HOME_FEE_TYPE, value)
+  }
+
+  async estimateWithFee(feeType: string, value: ValueTypes): Promise<EstimateReturn> {
+    const web3 = this.getExchange()
+      .getAsset(this.assetA)
+      .getWeb3()
+
+    const userAmount = this._getValue(value)
+
+    const contract = new web3.eth.Contract(MEDIATOR_ERC_TO_NATIVE_ABI, this.assetABridge)
+    const { feeAmount, feePercentage } = await this.getFee(feeType, contract, userAmount)
+    const finalAmount = toBN(userAmount).sub(feeAmount)
+    const estimateInfo = feeAmount.isZero() ? null : `${constants.ESTIMATE_FEE_MESSAGE} Fee: ${feePercentage}%`
+
+    return {
+      estimate: finalAmount.toString(),
+      estimateInfo
+    }
+  }
+
+  async getFee(feeType, contract, value): Promise<{ feeAmount: BN; feePercentage: number }> {
+    const fee = toBN(await contract.methods.getFee(feeType).call())
+    const feePercentage = Number(fromWei(fee, 'ether')) * 100
+    const feeAmount = toBN(await contract.methods.calculateFee(feeType, value).call())
+    return {
+      feeAmount,
+      feePercentage
+    }
+  }
+}

burner-wallet-plugin/tokenbridge-bw-exchange/src/index.ts

@@ -1,2 +1,12 @@
-export { ERC677Asset, NativeMediatorAsset, sPOA, Etc, Wetc, TokenBridgeGateway, Mediator } from './burner-wallet'
+export {
+  ERC677Asset,
+  BridgeableERC20Asset,
+  NativeMediatorAsset,
+  sPOA,
+  Etc,
+  Wetc,
+  TokenBridgeGateway,
+  Mediator,
+  MediatorErcToNative
+} from './burner-wallet'
 export { WETCBridge } from './wetc-bridge'

burner-wallet-plugin/tokenbridge-bw-exchange/src/utils/abis.ts

@@ -3,3 +3,4 @@ export { default as FOREIGN_NATIVE_TO_ERC_ABI } from './abis/ForeignBridgeNative
 export { default as HOME_NATIVE_TO_ERC_ABI } from './abis/HomeBridgeNativeToErc'
 export { default as MEDIATOR_ABI } from './abis/Mediator'
 export { default as MEDIATOR_FEE_MANAGER_ABI } from './abis/MediatorFeeManager'
+export { default as MEDIATOR_ERC_TO_NATIVE_ABI } from './abis/MediatorErcToNative'

burner-wallet-plugin/tokenbridge-bw-exchange/src/utils/abis/Mediator.ts

@@ -34,5 +34,23 @@ export default [
     payable: false,
     stateMutability: 'view',
     type: 'function'
+  },
+  {
+    constant: false,
+    inputs: [
+      {
+        name: '',
+        type: 'address'
+      },
+      {
+        name: '',
+        type: 'uint256'
+      }
+    ],
+    name: 'relayTokens',
+    outputs: [],
+    payable: false,
+    stateMutability: 'nonpayable',
+    type: 'function'
   }
 ]

burner-wallet-plugin/tokenbridge-bw-exchange/src/utils/abis/MediatorErcToNative.ts

@@ -0,0 +1,44 @@
+export default [
+  {
+    constant: true,
+    inputs: [
+      {
+        name: '',
+        type: 'bytes32'
+      }
+    ],
+    name: 'getFee',
+    outputs: [
+      {
+        name: '',
+        type: 'uint256'
+      }
+    ],
+    payable: false,
+    stateMutability: 'view',
+    type: 'function'
+  },
+  {
+    constant: true,
+    inputs: [
+      {
+        name: '',
+        type: 'bytes32'
+      },
+      {
+        name: '',
+        type: 'uint256'
+      }
+    ],
+    name: 'calculateFee',
+    outputs: [
+      {
+        name: '',
+        type: 'uint256'
+      }
+    ],
+    payable: false,
+    stateMutability: 'view',
+    type: 'function'
+  }
+]

burner-wallet-plugin/tokenbridge-bw-exchange/src/utils/index.ts

@@ -4,5 +4,6 @@ export {
   FOREIGN_NATIVE_TO_ERC_ABI,
   HOME_NATIVE_TO_ERC_ABI,
   MEDIATOR_ABI,
-  MEDIATOR_FEE_MANAGER_ABI
+  MEDIATOR_FEE_MANAGER_ABI,
+  MEDIATOR_ERC_TO_NATIVE_ABI
 } from './abis'

burner-wallet-plugin/tokenbridge-bw-exchange/src/utils/utils.ts

@@ -7,7 +7,11 @@ export const constants = {
   EXCHANGE_TIMEOUT: 300000,
   MAX_FEE: toWei('1', 'ether'),
   ESTIMATE_FEE_MESSAGE: 'Estimation takes fee charges into consideration.',
-  ZERO_ADDRESS: '0x0000000000000000000000000000000000000000'
+  ZERO_ADDRESS: '0x0000000000000000000000000000000000000000',
+  TRANSFER_TOPIC: '0xddf252ad1be2c89b69c2b068fc378daa952ba7f163c4a11628f55a4df523b3ef',
+  // fee types are taken from contracts/upgradeable_contracts/amb_erc20_to_native/HomeFeeManagerAMBErc20ToNative.sol
+  HOME_TO_FOREIGN_FEE_TYPE: '0x741ede137d0537e88e0ea0ff25b1f22d837903dbbee8980b4a06e8523247ee26',
+  FOREIGN_TO_HOME_FEE_TYPE: '0x03be2b2875cb41e0e77355e802a16769bb8dfcf825061cde185c73bf94f12625'
 }
 
 export const waitForEvent = async (web3, contract: Contract, event: string, callback: Function) => {

burner-wallet-plugin/yarn.lock

@@ -2600,11 +2600,6 @@
   resolved "https://registry.yarnpkg.com/@types/minimatch/-/minimatch-3.0.3.tgz#3dca0e3f33b200fc7d1139c0cd96c1268cadfd9d"
   integrity sha512-tHq6qdbT9U1IRSGf14CL0pUlULksvY9OZ+5eEgl1N7t+OA3tGvNpxJCzuKQlsNgCVwbAs670L1vcVQi8j9HjnA==
 
-"@types/mocha@^7.0.2":
-  version "7.0.2"
-  resolved "https://registry.yarnpkg.com/@types/mocha/-/mocha-7.0.2.tgz#b17f16cf933597e10d6d78eae3251e692ce8b0ce"
-  integrity sha512-ZvO2tAcjmMi8V/5Z3JsyofMe3hasRcaw88cto5etSVMwVQfeivGAlEYmaQgceUSVYFofVjT+ioHsATjdWcFt1w==
-
 "@types/node@*", "@types/node@>= 8":
   version "13.11.0"
   resolved "https://registry.yarnpkg.com/@types/node/-/node-13.11.0.tgz#390ea202539c61c8fa6ba4428b57e05bc36dc47b"
@@ -3220,11 +3215,6 @@ are-we-there-yet@~1.1.2:
     delegates "^1.0.0"
     readable-stream "^2.0.6"
 
-arg@^4.1.0:
-  version "4.1.3"
-  resolved "https://registry.yarnpkg.com/arg/-/arg-4.1.3.tgz#269fc7ad5b8e42cb63c896d5666017261c144089"
-  integrity sha512-58S9QDqG0Xx27YwPSt9fJxivjYl432YCwfDMfZ+71RAqUrZef7LrKQZ3LHLOwCS4FLNBplP533Zx895SeOCHvA==
-
 argparse@^1.0.7:
   version "1.0.10"
   resolved "https://registry.yarnpkg.com/argparse/-/argparse-1.0.10.tgz#bcd6791ea5ae09725e17e5ad988134cd40b3d911"
@@ -3350,11 +3340,6 @@ assert@^1.1.1:
     object-assign "^4.1.1"
     util "0.10.3"
 
-assertion-error@^1.1.0:
-  version "1.1.0"
-  resolved "https://registry.yarnpkg.com/assertion-error/-/assertion-error-1.1.0.tgz#e60b6b0e8f301bd97e5375215bda406c85118c0b"
-  integrity sha512-jgsaNduz+ndvGyFt3uSuWqvy4lCnIJiovtouQN5JZHOKCS2QuhEdbcQHFhVksz2N2U9hXJo8odG7ETyWlEeuDw==
-
 assign-symbols@^1.0.0:
   version "1.0.0"
   resolved "https://registry.yarnpkg.com/assign-symbols/-/assign-symbols-1.0.0.tgz#59667f41fadd4f20ccbc2bb96b8d4f7f78ec0367"
@@ -3450,13 +3435,6 @@ axios@^0.18.0:
     follow-redirects "1.5.10"
     is-buffer "^2.0.2"
 
-axios@^0.19.0:
-  version "0.19.2"
-  resolved "https://registry.yarnpkg.com/axios/-/axios-0.19.2.tgz#3ea36c5d8818d0d5f8a8a97a6d36b86cdc00cb27"
-  integrity sha512-fjgm5MvRHLhx+osE2xoekY70AhARk3a6hkN+3Io1jc00jtquGvxYlKlsFUhmUET0V5te6CcZI7lcv2Ym61mjHA==
-  dependencies:
-    follow-redirects "1.5.10"
-
 axobject-query@^2.0.2:
   version "2.1.2"
   resolved "https://registry.yarnpkg.com/axobject-query/-/axobject-query-2.1.2.tgz#2bdffc0371e643e5f03ba99065d5179b9ca79799"
@@ -3821,11 +3799,6 @@ browser-resolve@^1.11.3:
   dependencies:
     resolve "1.1.7"
 
-browser-stdout@1.3.1:
-  version "1.3.1"
-  resolved "https://registry.yarnpkg.com/browser-stdout/-/browser-stdout-1.3.1.tgz#baa559ee14ced73452229bad7326467c61fabd60"
-  integrity sha512-qhAVI1+Av2X7qelOfAIYwXONood6XlZE/fXaBSmW/T5SzLAmCgzi+eiWE7fUvbHaeNBQH13UftjpXxsfLkMpgw==
-
 browserify-aes@^1.0.0, browserify-aes@^1.0.4, browserify-aes@^1.0.6:
   version "1.2.0"
   resolved "https://registry.yarnpkg.com/browserify-aes/-/browserify-aes-1.2.0.tgz#326734642f403dabc3003209853bb70ad428ef48"
@@ -3838,7 +3811,7 @@ browserify-aes@^1.0.0, browserify-aes@^1.0.4, browserify-aes@^1.0.6:
     inherits "^2.0.1"
     safe-buffer "^5.0.1"
 
-browserify-cipher@^1.0.0, browserify-cipher@^1.0.1:
+browserify-cipher@^1.0.0:
   version "1.0.1"
   resolved "https://registry.yarnpkg.com/browserify-cipher/-/browserify-cipher-1.0.1.tgz#8d6474c1b870bfdabcd3bcfcc1934a10e94f15f0"
   integrity sha512-sPhkz0ARKbf4rRQt2hTpAHqn47X3llLkUGn+xEJzLjwY8LRs2p0v7ljvI5EyoRO/mexrNunNECisZs+gw2zz1w==
@@ -4215,18 +4188,6 @@ caseless@~0.12.0:
   resolved "https://registry.yarnpkg.com/caseless/-/caseless-0.12.0.tgz#1b681c21ff84033c826543090689420d187151dc"
   integrity sha1-G2gcIf+EAzyCZUMJBolCDRhxUdw=
 
-chai@^4.2.0:
-  version "4.2.0"
-  resolved "https://registry.yarnpkg.com/chai/-/chai-4.2.0.tgz#760aa72cf20e3795e84b12877ce0e83737aa29e5"
-  integrity sha512-XQU3bhBukrOsQCuwZndwGcCVQHyZi53fQ6Ys1Fym7E4olpIqqZZhhoFJoaKVvV17lWQoXYwgWN2nF5crA8J2jw==
-  dependencies:
-    assertion-error "^1.1.0"
-    check-error "^1.0.2"
-    deep-eql "^3.0.1"
-    get-func-name "^2.0.0"
-    pathval "^1.1.0"
-    type-detect "^4.0.5"
-
 chalk@2.4.2, chalk@^2.0.0, chalk@^2.0.1, chalk@^2.1.0, chalk@^2.3.0, chalk@^2.3.1, chalk@^2.4.1, chalk@^2.4.2:
   version "2.4.2"
   resolved "https://registry.yarnpkg.com/chalk/-/chalk-2.4.2.tgz#cd42541677a54333cf541a49108c1432b44c9424"
@@ -4252,11 +4213,6 @@ chardet@^0.7.0:
   resolved "https://registry.yarnpkg.com/chardet/-/chardet-0.7.0.tgz#90094849f0937f2eedc2425d0d28a9e5f0cbad9e"
   integrity sha512-mT8iDcrh03qDGRRmoA2hmBJnxpllMR+0/0qlzjqZES6NdiWDcZkCNAk4rPFZ9Q85r27unkiNNg8ZOiwZXBHwcA==
 
-check-error@^1.0.2:
-  version "1.0.2"
-  resolved "https://registry.yarnpkg.com/check-error/-/check-error-1.0.2.tgz#574d312edd88bb5dd8912e9286dd6c0aed4aac82"
-  integrity sha1-V00xLt2Iu13YkS6Sht1sCu1KrII=
-
 check-types@^8.0.3:
   version "8.0.3"
   resolved "https://registry.yarnpkg.com/check-types/-/check-types-8.0.3.tgz#3356cca19c889544f2d7a95ed49ce508a0ecf552"
@@ -4490,11 +4446,6 @@ combined-stream@^1.0.6, combined-stream@~1.0.6:
   dependencies:
     delayed-stream "~1.0.0"
 
-commander@2.15.1:
-  version "2.15.1"
-  resolved "https://registry.yarnpkg.com/commander/-/commander-2.15.1.tgz#df46e867d0fc2aec66a34662b406a9ccafff5b0f"
-  integrity sha512-VlfT9F3V0v+jr4yxPc5gg9s62/fIVWsd2Bk2iD435um1NlGMYdVCq+MjcXnhYq2icNOizHr1kK+5TI6H0Hy0ag==
-
 commander@2.17.x:
   version "2.17.1"
   resolved "https://registry.yarnpkg.com/commander/-/commander-2.17.1.tgz#bd77ab7de6de94205ceacc72f1716d29f20a77bf"
@@ -5290,13 +5241,6 @@ dedent@^0.7.0:
   resolved "https://registry.yarnpkg.com/dedent/-/dedent-0.7.0.tgz#2495ddbaf6eb874abb0e1be9df22d2e5a544326c"
   integrity sha1-JJXduvbrh0q7Dhvp3yLS5aVEMmw=
 
-deep-eql@^3.0.1:
-  version "3.0.1"
-  resolved "https://registry.yarnpkg.com/deep-eql/-/deep-eql-3.0.1.tgz#dfc9404400ad1c8fe023e7da1df1c147c4b444df"
-  integrity sha512-+QeIQyN5ZuO+3Uk5DYh6/1eKO0m0YmJFGNmFHGACpf1ClL1nmlV/p4gNgbl2pJGxgXb4faqo6UE+M5ACEMyVcw==
-  dependencies:
-    type-detect "^4.0.0"
-
 deep-equal@^1.0.1:
   version "1.1.1"
   resolved "https://registry.yarnpkg.com/deep-equal/-/deep-equal-1.1.1.tgz#b5c98c942ceffaf7cb051e24e1434a25a2e6076a"
@@ -5469,16 +5413,6 @@ diff-sequences@^24.9.0:
   resolved "https://registry.yarnpkg.com/diff-sequences/-/diff-sequences-24.9.0.tgz#5715d6244e2aa65f48bba0bc972db0b0b11e95b5"
   integrity sha512-Dj6Wk3tWyTE+Fo1rW8v0Xhwk80um6yFYKbuAxc9c3EZxIHFDYwbi34Uk42u1CdnIiVorvt4RmlSDjIPyzGC2ew==
 
-diff@3.5.0:
-  version "3.5.0"
-  resolved "https://registry.yarnpkg.com/diff/-/diff-3.5.0.tgz#800c0dd1e0a8bfbc95835c202ad220fe317e5a12"
-  integrity sha512-A46qtFgd+g7pDZinpnwiRJtxbC1hpgf0uzP3iG89scHk0AUC7A1TGxf5OiiOUv/JMZR8GOt8hL900hV0bOy5xA==
-
-diff@^4.0.1:
-  version "4.0.2"
-  resolved "https://registry.yarnpkg.com/diff/-/diff-4.0.2.tgz#60f3aecb89d5fae520c11aa19efc2bb982aade7d"
-  integrity sha512-58lmxKSA4BNyLz+HHMUzlOEpg09FV+ev6ZMe3vJihgdxzgcwZ8VoEEPmALCZG9LmqfVoNMMKpttIYTVG6uDY7A==
-
 diffie-hellman@^5.0.0:
   version "5.0.3"
   resolved "https://registry.yarnpkg.com/diffie-hellman/-/diffie-hellman-5.0.3.tgz#40e8ee98f55a2149607146921c63e1ae5f3d2875"
@@ -6531,7 +6465,7 @@ ethers@4.0.44:
     uuid "2.0.1"
     xmlhttprequest "1.8.0"
 
-ethers@^4.0.27, ethers@~4.0.4:
+ethers@~4.0.4:
   version "4.0.46"
   resolved "https://registry.yarnpkg.com/ethers/-/ethers-4.0.46.tgz#13cd3ed099487f43ece00194b89a8a8781f71507"
   integrity sha512-/dPMzzpInhtiip4hKFvsDiJKeRk64IhyA+Po7CtNXneQFSOCYXg8eBFt+jXbxUQyApgWnWOtYxWdfn9+CvvxDA==
@@ -6546,7 +6480,7 @@ ethers@^4.0.27, ethers@~4.0.4:
     uuid "2.0.1"
     xmlhttprequest "1.8.0"
 
-ethjs-unit@0.1.6, ethjs-unit@^0.1.6:
+ethjs-unit@0.1.6:
   version "0.1.6"
   resolved "https://registry.yarnpkg.com/ethjs-unit/-/ethjs-unit-0.1.6.tgz#c665921e476e87bce2a9d588a6fe0405b2c41699"
   integrity sha1-xmWSHkduh7ziqdWIpv4EBbLEFpk=
@@ -6562,11 +6496,6 @@ ethjs-util@0.1.6, ethjs-util@^0.1.3:
     is-hex-prefixed "1.0.0"
     strip-hex-prefix "1.0.0"
 
-eventemitter3@3.1.0:
-  version "3.1.0"
-  resolved "https://registry.yarnpkg.com/eventemitter3/-/eventemitter3-3.1.0.tgz#090b4d6cdbd645ed10bf750d4b5407942d7ba163"
-  integrity sha512-ivIvhpq/Y0uSjcHDcOIccjmYjGLcP09MFGE7ysAwkAvkXfpZlC985pH2/ui64DKazbTW/4kN3yqozUxlXzI6cA==
-
 eventemitter3@3.1.2, eventemitter3@^3.1.0:
   version "3.1.2"
   resolved "https://registry.yarnpkg.com/eventemitter3/-/eventemitter3-3.1.2.tgz#2d3d48f9c346698fce83a85d7d664e98535df6e7"
@@ -7164,11 +7093,6 @@ get-caller-file@^2.0.1:
   resolved "https://registry.yarnpkg.com/get-caller-file/-/get-caller-file-2.0.5.tgz#4f94412a82db32f36e3b0b9741f8a97feb031f7e"
   integrity sha512-DyFP3BM/3YHTQOCUL/w0OZHR0lpKeGrxotcHWcqNEdnltqFwXVfhEBQ94eIo34AfQpo0rGki4cyIiftY06h2Fg==
 
-get-func-name@^2.0.0:
-  version "2.0.0"
-  resolved "https://registry.yarnpkg.com/get-func-name/-/get-func-name-2.0.0.tgz#ead774abee72e20409433a066366023dd6887a41"
-  integrity sha1-6td0q+5y4gQJQzoGY2YCPdaIekE=
-
 get-own-enumerable-property-symbols@^3.0.0:
   version "3.0.2"
   resolved "https://registry.yarnpkg.com/get-own-enumerable-property-symbols/-/get-own-enumerable-property-symbols-3.0.2.tgz#b5fde77f22cbe35f390b4e089922c50bce6ef664"
@@ -7303,18 +7227,6 @@ glob-to-regexp@^0.3.0:
   resolved "https://registry.yarnpkg.com/glob-to-regexp/-/glob-to-regexp-0.3.0.tgz#8c5a1494d2066c570cc3bfe4496175acc4d502ab"
   integrity sha1-jFoUlNIGbFcMw7/kSWF1rMTVAqs=
 
-glob@7.1.2:
-  version "7.1.2"
-  resolved "https://registry.yarnpkg.com/glob/-/glob-7.1.2.tgz#c19c9df9a028702d678612384a6552404c636d15"
-  integrity sha512-MJTUg1kjuLeQCJ+ccE4Vpa6kKVXkPYJ2mOCQyUuKLcLQsdrMCpBPUi8qVE6+YuaJkozeA9NusTAw3hLr8Xe5EQ==
-  dependencies:
-    fs.realpath "^1.0.0"
-    inflight "^1.0.4"
-    inherits "2"
-    minimatch "^3.0.4"
-    once "^1.3.0"
-    path-is-absolute "^1.0.0"
-
 glob@^7.0.3, glob@^7.1.1, glob@^7.1.2, glob@^7.1.3, glob@^7.1.4:
   version "7.1.6"
   resolved "https://registry.yarnpkg.com/glob/-/glob-7.1.6.tgz#141f33b81a7c2492e125594307480c46679278a6"
@@ -7448,11 +7360,6 @@ graceful-fs@^4.1.10, graceful-fs@^4.1.11, graceful-fs@^4.1.15, graceful-fs@^4.1.
   resolved "https://registry.yarnpkg.com/graceful-readlink/-/graceful-readlink-1.0.1.tgz#4cafad76bc62f02fa039b2f94e9a3dd3a391a725"
   integrity sha1-TK+tdrxi8C+gObL5Tpo906ORpyU=
 
-growl@1.10.5:
-  version "1.10.5"
-  resolved "https://registry.yarnpkg.com/growl/-/growl-1.10.5.tgz#f2735dc2283674fa67478b10181059355c369e5e"
-  integrity sha512-qBr4OuELkhPenW6goKVXiv47US3clb3/IbuWF9KNKEijAy9oeHxU9IgzjvJhHkUzhaj7rOUD7+YGWqUjLp5oSA==
-
 growly@^1.3.0:
   version "1.3.0"
   resolved "https://registry.yarnpkg.com/growly/-/growly-1.3.0.tgz#f10748cbe76af964b7c96c93c6bcc28af120c081"
@@ -7611,11 +7518,6 @@ hdkey@^1.1.1:
     safe-buffer "^5.1.1"
     secp256k1 "^3.0.1"
 
-he@1.1.1:
-  version "1.1.1"
-  resolved "https://registry.yarnpkg.com/he/-/he-1.1.1.tgz#93410fd21b009735151f8868c2f271f3427e23fd"
-  integrity sha1-k0EP0hsAlzUVH4howvJx80J+I/0=
-
 he@1.2.x:
   version "1.2.0"
   resolved "https://registry.yarnpkg.com/he/-/he-1.2.0.tgz#84ae65fa7eafb165fddb61566ae14baf05664f0f"
@@ -9690,11 +9592,6 @@ make-dir@^2.0.0, make-dir@^2.1.0:
     pify "^4.0.1"
     semver "^5.6.0"
 
-make-error@^1.1.1:
-  version "1.3.6"
-  resolved "https://registry.yarnpkg.com/make-error/-/make-error-1.3.6.tgz#2eb2e37ea9b67c4891f684a1394799af484cf7a2"
-  integrity sha512-s8UhlNe7vPKomQhC1qFelMokr/Sc3AgNbso3n74mVPA5LTZwkB9NlXf4XPamLxJE8h0gh73rM94xvwRT2CVInw==
-
 make-fetch-happen@^5.0.0:
   version "5.0.2"
   resolved "https://registry.yarnpkg.com/make-fetch-happen/-/make-fetch-happen-5.0.2.tgz#aa8387104f2687edca01c8687ee45013d02d19bd"
@@ -10046,11 +9943,6 @@ minimist-options@^3.0.1:
     arrify "^1.0.1"
     is-plain-obj "^1.1.0"
 
-minimist@0.0.8:
-  version "0.0.8"
-  resolved "https://registry.yarnpkg.com/minimist/-/minimist-0.0.8.tgz#857fcabfc3397d2625b8228262e86aa7a011b05d"
-  integrity sha1-hX/Kv8M5fSYluCKCYuhqp6ARsF0=
-
 minimist@^1.1.1, minimist@^1.1.3, minimist@^1.2.0, minimist@^1.2.5:
   version "1.2.5"
   resolved "https://registry.yarnpkg.com/minimist/-/minimist-1.2.5.tgz#67d66014b66a6a8aaa0c083c5fd58df4e4e97602"
@@ -10115,13 +10007,6 @@ mkdirp@*:
   resolved "https://registry.yarnpkg.com/mkdirp/-/mkdirp-1.0.4.tgz#3eb5ed62622756d79a5f0e2a221dfebad75c2f7e"
   integrity sha512-vVqVZQyf3WLx2Shd0qJ9xuvqgAyKPLAiqITEtqW0oIUjzo3PePDd6fW9iFz30ef7Ysp/oiWqbhszeGWW2T6Gzw==
 
-mkdirp@0.5.1:
-  version "0.5.1"
-  resolved "https://registry.yarnpkg.com/mkdirp/-/mkdirp-0.5.1.tgz#30057438eac6cf7f8c4767f38648d6697d75c903"
-  integrity sha1-MAV0OOrGz3+MR2fzhkjWaX11yQM=
-  dependencies:
-    minimist "0.0.8"
-
 mkdirp@^0.5.0, mkdirp@^0.5.1:
   version "0.5.5"
   resolved "https://registry.yarnpkg.com/mkdirp/-/mkdirp-0.5.5.tgz#d91cefd62d1436ca0f41620e251288d420099def"
@@ -10136,23 +10021,6 @@ mkdirp@~0.5.0, mkdirp@~0.5.1:
   dependencies:
     minimist "^1.2.5"
 
-mocha@^5.2.0:
-  version "5.2.0"
-  resolved "https://registry.yarnpkg.com/mocha/-/mocha-5.2.0.tgz#6d8ae508f59167f940f2b5b3c4a612ae50c90ae6"
-  integrity sha512-2IUgKDhc3J7Uug+FxMXuqIyYzH7gJjXECKe/w43IGgQHTSj3InJi+yAA7T24L9bQMRKiUEHxEX37G5JpVUGLcQ==
-  dependencies:
-    browser-stdout "1.3.1"
-    commander "2.15.1"
-    debug "3.1.0"
-    diff "3.5.0"
-    escape-string-regexp "1.0.5"
-    glob "7.1.2"
-    growl "1.10.5"
-    he "1.1.1"
-    minimatch "3.0.4"
-    mkdirp "0.5.1"
-    supports-color "5.4.0"
-
 mock-fs@^4.1.0:
   version "4.11.0"
   resolved "https://registry.yarnpkg.com/mock-fs/-/mock-fs-4.11.0.tgz#0828107e4b843a6ba855ecebfe3c6e073b69db92"
@@ -10237,7 +10105,7 @@ nan@2.13.2:
   resolved "https://registry.yarnpkg.com/nan/-/nan-2.13.2.tgz#f51dc7ae66ba7d5d55e1e6d4d8092e802c9aefe7"
   integrity sha512-TghvYc72wlMGMVMluVo9WRJc0mB8KxxF/gZ4YYFy7V2ZQX9l7rgbPg7vjS9mt6U5HXODVFVI2bOduCzwOMv/lw==
 
-nan@2.14.0, nan@^2.0.8, nan@^2.12.1, nan@^2.14.0, nan@^2.2.1:
+nan@2.14.0, nan@^2.12.1, nan@^2.14.0, nan@^2.2.1:
   version "2.14.0"
   resolved "https://registry.yarnpkg.com/nan/-/nan-2.14.0.tgz#7818f722027b2459a86f0295d434d1fc2336c52c"
   integrity sha512-INOFj37C7k3AfaNTtX8RhsTw7qRy7eLET14cROi9+5HAVbbHuIWUHEauBv5qT4Av2tWasiTY1Jw6puUNqRJXQg==
@@ -11099,12 +10967,7 @@ path-type@^4.0.0:
   resolved "https://registry.yarnpkg.com/path-type/-/path-type-4.0.0.tgz#84ed01c0a7ba380afe09d90a8c180dcd9d03043b"
   integrity sha512-gDKb8aZMDeD/tZWs9P6+q0J9Mwkdl6xMV8TjnGP3qJVJ06bdMgkbBlLU8IdfOsIsFz2BW1rNVT3XuNEl8zPAvw==
 
-pathval@^1.1.0:
+pbkdf2@^3.0.3:
-  version "1.1.0"
-  resolved "https://registry.yarnpkg.com/pathval/-/pathval-1.1.0.tgz#b942e6d4bde653005ef6b71361def8727d0645e0"
-  integrity sha1-uULm1L3mUwBe9rcTYd74cn0GReA=
-
-pbkdf2@^3.0.17, pbkdf2@^3.0.3:
   version "3.0.17"
   resolved "https://registry.yarnpkg.com/pbkdf2/-/pbkdf2-3.0.17.tgz#976c206530617b14ebb32114239f7b09336e93a6"
   integrity sha512-U/il5MsrZp7mGg3mSQfn742na2T+1/vHDCG5/iTI3X9MKUuYUZVLQhyRsg06mCgDBTd57TxzgZt7P+fYfjRLtA==
@@ -12127,7 +11990,7 @@ querystring@0.2.0:
   resolved "https://registry.yarnpkg.com/querystring/-/querystring-0.2.0.tgz#b209849203bb25df820da756e747005878521620"
   integrity sha1-sgmEkgO7Jd+CDadW50cAWHhSFiA=
 
-querystringify@^2.0.0, querystringify@^2.1.1:
+querystringify@^2.1.1:
   version "2.1.1"
   resolved "https://registry.yarnpkg.com/querystringify/-/querystringify-2.1.1.tgz#60e5a5fd64a7f8bfa4d2ab2ed6fdf4c85bad154e"
   integrity sha512-w7fLxIRCRT7U8Qu53jQnJyPkYZIaR4n5151KMfcJlO/A9397Wxb1amJvROTK6TOnp7PfoAmg/qXiNHI+08jRfA==
@@ -12970,29 +12833,6 @@ scrypt-js@2.0.4:
   resolved "https://registry.yarnpkg.com/scrypt-js/-/scrypt-js-2.0.4.tgz#32f8c5149f0797672e551c07e230f834b6af5f16"
   integrity sha512-4KsaGcPnuhtCZQCxFxN3GVYIhKFPTdLd8PLC552XwbMndtD0cjRFAhDuuydXQ0h08ZfPgzqe6EKHozpuH74iDw==
 
-scrypt.js@0.3.0:
-  version "0.3.0"
-  resolved "https://registry.yarnpkg.com/scrypt.js/-/scrypt.js-0.3.0.tgz#6c62d61728ad533c8c376a2e5e3e86d41a95c4c0"
-  integrity sha512-42LTc1nyFsyv/o0gcHtDztrn+aqpkaCNt5Qh7ATBZfhEZU7IC/0oT/qbBH+uRNoAPvs2fwiOId68FDEoSRA8/A==
-  dependencies:
-    scryptsy "^1.2.1"
-  optionalDependencies:
-    scrypt "^6.0.2"
-
-scrypt@^6.0.2:
-  version "6.0.3"
-  resolved "https://registry.yarnpkg.com/scrypt/-/scrypt-6.0.3.tgz#04e014a5682b53fa50c2d5cce167d719c06d870d"
-  integrity sha1-BOAUpWgrU/pQwtXM4WfXGcBthw0=
-  dependencies:
-    nan "^2.0.8"
-
-scryptsy@^1.2.1:
-  version "1.2.1"
-  resolved "https://registry.yarnpkg.com/scryptsy/-/scryptsy-1.2.1.tgz#a3225fa4b2524f802700761e2855bdf3b2d92163"
-  integrity sha1-oyJfpLJST4AnAHYeKFW987LZIWM=
-  dependencies:
-    pbkdf2 "^3.0.3"
-
 scryptsy@^2.1.0:
   version "2.1.0"
   resolved "https://registry.yarnpkg.com/scryptsy/-/scryptsy-2.1.0.tgz#8d1e8d0c025b58fdd25b6fa9a0dc905ee8faa790"
@@ -13872,13 +13712,6 @@ stylis@^3.5.0:
   resolved "https://registry.yarnpkg.com/stylis/-/stylis-3.5.4.tgz#f665f25f5e299cf3d64654ab949a57c768b73fbe"
   integrity sha512-8/3pSmthWM7lsPBKv7NXkzn2Uc9W7NotcwGNpJaa3k7WMM1XDCA4MgT5k/8BIexd5ydZdboXtU90XH9Ec4Bv/Q==
 
-supports-color@5.4.0:
-  version "5.4.0"
-  resolved "https://registry.yarnpkg.com/supports-color/-/supports-color-5.4.0.tgz#1c6b337402c2137605efe19f10fec390f6faab54"
-  integrity sha512-zjaXglF5nnWpsq470jSv6P9DwPvgLkuapYmfDm3JWOm0vkNTVF2tI4UrN2r6jH1qM/uc/WtxYY1hYoA2dOKj5w==
-  dependencies:
-    has-flag "^3.0.0"
-
 supports-color@^2.0.0:
   version "2.0.0"
   resolved "https://registry.yarnpkg.com/supports-color/-/supports-color-2.0.0.tgz#535d045ce6b6363fa40117084629995e9df324c7"
@@ -14243,17 +14076,6 @@ tryer@^1.0.1:
   resolved "https://registry.yarnpkg.com/tryer/-/tryer-1.0.1.tgz#f2c85406800b9b0f74c9f7465b81eaad241252f8"
   integrity sha512-c3zayb8/kWWpycWYg87P71E1S1ZL6b6IJxfb5fvsUgsf0S2MVGaDhDXXjDMpdCpfWXqptc+4mXwmiy1ypXqRAA==
 
-ts-node@^8.8.2:
-  version "8.8.2"
-  resolved "https://registry.yarnpkg.com/ts-node/-/ts-node-8.8.2.tgz#0b39e690bee39ea5111513a9d2bcdc0bc121755f"
-  integrity sha512-duVj6BpSpUpD/oM4MfhO98ozgkp3Gt9qIp3jGxwU2DFvl/3IRaEAvbLa8G60uS7C77457e/m5TMowjedeRxI1Q==
-  dependencies:
-    arg "^4.1.0"
-    diff "^4.0.1"
-    make-error "^1.1.1"
-    source-map-support "^0.5.6"
-    yn "3.1.1"
-
 ts-pnp@1.1.2:
   version "1.1.2"
   resolved "https://registry.yarnpkg.com/ts-pnp/-/ts-pnp-1.1.2.tgz#be8e4bfce5d00f0f58e0666a82260c34a57af552"
@@ -14300,11 +14122,6 @@ type-check@~0.3.2:
   dependencies:
     prelude-ls "~1.1.2"
 
-type-detect@^4.0.0, type-detect@^4.0.5:
-  version "4.0.8"
-  resolved "https://registry.yarnpkg.com/type-detect/-/type-detect-4.0.8.tgz#7646fb5f18871cfbb7749e69bd39a6388eb7450c"
-  integrity sha512-0fr/mIH1dlO+x7TlcMy+bIDqKPsw/70tVyeHW787goQjhmqaZe10uwLujubK9q9Lg6Fiho1KUKDYz0Z7k7g5/g==
-
 type-fest@^0.3.0:
   version "0.3.1"
   resolved "https://registry.yarnpkg.com/type-fest/-/type-fest-0.3.1.tgz#63d00d204e059474fe5e1b7c011112bbd1dc29e1"
@@ -14350,11 +14167,6 @@ typescript@3.5.3:
   resolved "https://registry.yarnpkg.com/typescript/-/typescript-3.5.3.tgz#c830f657f93f1ea846819e929092f5fe5983e977"
   integrity sha512-ACzBtm/PhXBDId6a6sDJfroT2pOWt/oOnk4/dElG5G33ZL776N3Y6/6bKZJBFpd+b05F3Ct9qDjMeJmRWtE2/g==
 
-typescript@^3.5.2:
-  version "3.8.3"
-  resolved "https://registry.yarnpkg.com/typescript/-/typescript-3.8.3.tgz#409eb8544ea0335711205869ec458ab109ee1061"
-  integrity sha512-MYlEfn5VrLNsgudQTVJeNaQFUAI7DkhnOjdpAp4T+ku1TfQClewlbSuTVHiA+8skNBgaf02TL/kLOvig4y3G8w==
-
 uglify-js@3.4.x:
   version "3.4.10"
   resolved "https://registry.yarnpkg.com/uglify-js/-/uglify-js-3.4.10.tgz#9ad9563d8eb3acdfb8d38597d2af1d815f6a755f"
@@ -14538,14 +14350,6 @@ url-parse-lax@^3.0.0:
   dependencies:
     prepend-http "^2.0.0"
 
-url-parse@1.4.4:
-  version "1.4.4"
-  resolved "https://registry.yarnpkg.com/url-parse/-/url-parse-1.4.4.tgz#cac1556e95faa0303691fec5cf9d5a1bc34648f8"
-  integrity sha512-/92DTTorg4JjktLNLe6GPS2/RvAd/RGr6LuktmWSMLEOa6rjnlrFXNgSbSmkNvCoL2T028A0a1JaJLzRMlFoHg==
-  dependencies:
-    querystringify "^2.0.0"
-    requires-port "^1.0.0"
-
 url-parse@^1.4.3:
   version "1.4.7"
   resolved "https://registry.yarnpkg.com/url-parse/-/url-parse-1.4.7.tgz#a8a83535e8c00a316e403a5db4ac1b9b853ae278"
@@ -14577,11 +14381,6 @@ use@^3.1.0:
   resolved "https://registry.yarnpkg.com/use/-/use-3.1.1.tgz#d50c8cac79a19fbc20f2911f56eb973f4e10070f"
   integrity sha512-cwESVXlO3url9YWlFW/TA9cshCEhtu7IKJ/p5soJ/gGpj7vbvFrAY/eIioQ6Dw23KjZhYgiIo8HOs1nQ2vr/oQ==
 
-utf8@2.1.1:
-  version "2.1.1"
-  resolved "https://registry.yarnpkg.com/utf8/-/utf8-2.1.1.tgz#2e01db02f7d8d0944f77104f1609eb0c304cf768"
-  integrity sha1-LgHbAvfY0JRPdxBPFgnrDDBM92g=
-
 utf8@3.0.0, utf8@^3.0.0:
   version "3.0.0"
   resolved "https://registry.yarnpkg.com/utf8/-/utf8-3.0.0.tgz#f052eed1364d696e769ef058b183df88c87f69d1"
@@ -14771,17 +14570,6 @@ web3-bzz@1.2.6:
     swarm-js "0.1.39"
     underscore "1.9.1"
 
-web3-core-helpers@1.0.0-beta.55:
-  version "1.0.0-beta.55"
-  resolved "https://registry.yarnpkg.com/web3-core-helpers/-/web3-core-helpers-1.0.0-beta.55.tgz#832b8499889f9f514b1d174f00172fd3683d63de"
-  integrity sha512-suj9Xy/lIqajaYLJTEjr2rlFgu6hGYwChHmf8+qNrC2luZA6kirTamtB9VThWMxbywx7p0bqQFjW6zXogAgWhg==
-  dependencies:
-    "@babel/runtime" "^7.3.1"
-    lodash "^4.17.11"
-    web3-core "1.0.0-beta.55"
-    web3-eth-iban "1.0.0-beta.55"
-    web3-utils "1.0.0-beta.55"
-
 web3-core-helpers@1.2.6:
   version "1.2.6"
   resolved "https://registry.yarnpkg.com/web3-core-helpers/-/web3-core-helpers-1.2.6.tgz#7aacd25bf8015adcdfc0f3243d0dcfdff0373f7d"
@@ -14791,20 +14579,6 @@ web3-core-helpers@1.2.6:
     web3-eth-iban "1.2.6"
     web3-utils "1.2.6"
 
-web3-core-method@1.0.0-beta.55:
-  version "1.0.0-beta.55"
-  resolved "https://registry.yarnpkg.com/web3-core-method/-/web3-core-method-1.0.0-beta.55.tgz#0af994295ac2dd64ccd53305b7df8da76e11da49"
-  integrity sha512-w1cW/s2ji9qGELHk2uMJCn1ooay0JJLVoPD1nvmsW6OTRWcVjxa62nJrFQhe6P5lEb83Xk9oHgmCxZoVUHibOw==
-  dependencies:
-    "@babel/runtime" "^7.3.1"
-    eventemitter3 "3.1.0"
-    lodash "^4.17.11"
-    rxjs "^6.4.0"
-    web3-core "1.0.0-beta.55"
-    web3-core-helpers "1.0.0-beta.55"
-    web3-core-subscriptions "1.0.0-beta.55"
-    web3-utils "1.0.0-beta.55"
-
 web3-core-method@1.2.6:
   version "1.2.6"
   resolved "https://registry.yarnpkg.com/web3-core-method/-/web3-core-method-1.2.6.tgz#f5a3e4d304abaf382923c8ab88ec8eeef45c1b3b"
@@ -14835,15 +14609,6 @@ web3-core-requestmanager@1.2.6:
     web3-providers-ipc "1.2.6"
     web3-providers-ws "1.2.6"
 
-web3-core-subscriptions@1.0.0-beta.55:
-  version "1.0.0-beta.55"
-  resolved "https://registry.yarnpkg.com/web3-core-subscriptions/-/web3-core-subscriptions-1.0.0-beta.55.tgz#105902c13db53466fc17d07a981ad3d41c700f76"
-  integrity sha512-pb3oQbUzK7IoyXwag8TYInQddg0rr7BHxKc+Pbs/92hVNQ5ps4iGMVJKezdrjlQ1IJEEUiDIglXl4LZ1hIuMkw==
-  dependencies:
-    "@babel/runtime" "^7.3.1"
-    eventemitter3 "^3.1.0"
-    lodash "^4.17.11"
-
 web3-core-subscriptions@1.2.6:
   version "1.2.6"
   resolved "https://registry.yarnpkg.com/web3-core-subscriptions/-/web3-core-subscriptions-1.2.6.tgz#9d44189e2321f8f1abc31f6c09103b5283461b57"
@@ -14853,19 +14618,6 @@ web3-core-subscriptions@1.2.6:
     underscore "1.9.1"
     web3-core-helpers "1.2.6"
 
-web3-core@1.0.0-beta.55:
-  version "1.0.0-beta.55"
-  resolved "https://registry.yarnpkg.com/web3-core/-/web3-core-1.0.0-beta.55.tgz#26b9abbf1bc1837c9cc90f06ecbc4ed714f89b53"
-  integrity sha512-AMMp7TLEtE7u8IJAu/THrRhBTZyZzeo7Y6GiWYNwb5+KStC9hIGLr9cI1KX9R6ZioTOLRHrqT7awDhnJ1ku2mg==
-  dependencies:
-    "@babel/runtime" "^7.3.1"
-    "@types/bn.js" "^4.11.4"
-    "@types/node" "^10.12.18"
-    lodash "^4.17.11"
-    web3-core-method "1.0.0-beta.55"
-    web3-providers "1.0.0-beta.55"
-    web3-utils "1.0.0-beta.55"
-
 web3-core@1.2.6:
   version "1.2.6"
   resolved "https://registry.yarnpkg.com/web3-core/-/web3-core-1.2.6.tgz#bb42a1d7ae49a7258460f0d95ddb00906f59ef92"
@@ -14878,16 +14630,6 @@ web3-core@1.2.6:
     web3-core-requestmanager "1.2.6"
     web3-utils "1.2.6"
 
-web3-eth-abi@1.0.0-beta.55:
-  version "1.0.0-beta.55"
-  resolved "https://registry.yarnpkg.com/web3-eth-abi/-/web3-eth-abi-1.0.0-beta.55.tgz#69250420039346105a3d0f899c0a8a53be926f97"
-  integrity sha512-3h1xnm/vYmKUXTOYAOP0OsB5uijQV76pNNRGKOB6Dq6GR1pbcbD3WrB/4I643YA8l91t5FRzFzUiA3S77R2iqw==
-  dependencies:
-    "@babel/runtime" "^7.3.1"
-    ethers "^4.0.27"
-    lodash "^4.17.11"
-    web3-utils "1.0.0-beta.55"
-
 web3-eth-abi@1.2.6, web3-eth-abi@^1.2.1:
   version "1.2.6"
   resolved "https://registry.yarnpkg.com/web3-eth-abi/-/web3-eth-abi-1.2.6.tgz#b495383cc5c0d8e2857b26e7fe25606685983b25"
@@ -14897,25 +14639,6 @@ web3-eth-abi@1.2.6, web3-eth-abi@^1.2.1:
     underscore "1.9.1"
     web3-utils "1.2.6"
 
-web3-eth-accounts@1.0.0-beta.55:
-  version "1.0.0-beta.55"
-  resolved "https://registry.yarnpkg.com/web3-eth-accounts/-/web3-eth-accounts-1.0.0-beta.55.tgz#ba734ffdc1e3cc8ac0ea01de5241323a0c2f69f3"
-  integrity sha512-VfzvwpSDHXqRVelIxsBVhgbV9BkFvhJ/q+bKhnVUUXV0JAhMK/7uC92TsqKk4EBYuqpHyZ1jjqrL4n03fMU7zw==
-  dependencies:
-    "@babel/runtime" "^7.3.1"
-    browserify-cipher "^1.0.1"
-    eth-lib "0.2.8"
-    lodash "^4.17.11"
-    pbkdf2 "^3.0.17"
-    randombytes "^2.1.0"
-    scrypt.js "0.3.0"
-    uuid "3.3.2"
-    web3-core "1.0.0-beta.55"
-    web3-core-helpers "1.0.0-beta.55"
-    web3-core-method "1.0.0-beta.55"
-    web3-providers "1.0.0-beta.55"
-    web3-utils "1.0.0-beta.55"
-
 web3-eth-accounts@1.2.6:
   version "1.2.6"
   resolved "https://registry.yarnpkg.com/web3-eth-accounts/-/web3-eth-accounts-1.2.6.tgz#a1ba4bf75fa8102a3ec6cddd0eccd72462262720"
@@ -14934,23 +14657,6 @@ web3-eth-accounts@1.2.6:
     web3-core-method "1.2.6"
     web3-utils "1.2.6"
 
-web3-eth-contract@1.0.0-beta.55:
-  version "1.0.0-beta.55"
-  resolved "https://registry.yarnpkg.com/web3-eth-contract/-/web3-eth-contract-1.0.0-beta.55.tgz#cd9e6727ff73d648ebe7cae17516e8aec5873c65"
-  integrity sha512-v6oB1wfH039/A5sTb4ZTKX++fcBTHEkuQGpq50ATIDoxP/UTz2+6S+iL+3sCJTsByPw2/Bni/HM7NmLkXqzg/Q==
-  dependencies:
-    "@babel/runtime" "^7.3.1"
-    "@types/bn.js" "^4.11.4"
-    lodash "^4.17.11"
-    web3-core "1.0.0-beta.55"
-    web3-core-helpers "1.0.0-beta.55"
-    web3-core-method "1.0.0-beta.55"
-    web3-core-subscriptions "1.0.0-beta.55"
-    web3-eth-abi "1.0.0-beta.55"
-    web3-eth-accounts "1.0.0-beta.55"
-    web3-providers "1.0.0-beta.55"
-    web3-utils "1.0.0-beta.55"
-
 web3-eth-contract@1.2.6:
   version "1.2.6"
   resolved "https://registry.yarnpkg.com/web3-eth-contract/-/web3-eth-contract-1.2.6.tgz#39111543960035ed94c597a239cf5aa1da796741"
@@ -14966,24 +14672,6 @@ web3-eth-contract@1.2.6:
     web3-eth-abi "1.2.6"
     web3-utils "1.2.6"
 
-web3-eth-ens@1.0.0-beta.55:
-  version "1.0.0-beta.55"
-  resolved "https://registry.yarnpkg.com/web3-eth-ens/-/web3-eth-ens-1.0.0-beta.55.tgz#4341434a3406728212d411ae7f22d4cf5b8642fe"
-  integrity sha512-jEL17coO0FJXb7KYq4+7DhVXj0Rh+wHfZ86jOvFUvJsRaUHfqK2TlMatuhD2mbrmxpBYb6oMPnXVnNK9bnD5Rg==
-  dependencies:
-    "@babel/runtime" "^7.3.1"
-    eth-ens-namehash "2.0.8"
-    lodash "^4.17.11"
-    web3-core "1.0.0-beta.55"
-    web3-core-helpers "1.0.0-beta.55"
-    web3-core-method "1.0.0-beta.55"
-    web3-eth-abi "1.0.0-beta.55"
-    web3-eth-accounts "1.0.0-beta.55"
-    web3-eth-contract "1.0.0-beta.55"
-    web3-net "1.0.0-beta.55"
-    web3-providers "1.0.0-beta.55"
-    web3-utils "1.0.0-beta.55"
-
 web3-eth-ens@1.2.6:
   version "1.2.6"
   resolved "https://registry.yarnpkg.com/web3-eth-ens/-/web3-eth-ens-1.2.6.tgz#bf86a624c4c72bc59913c2345180d3ea947e110d"
@@ -14998,15 +14686,6 @@ web3-eth-ens@1.2.6:
     web3-eth-contract "1.2.6"
     web3-utils "1.2.6"
 
-web3-eth-iban@1.0.0-beta.55:
-  version "1.0.0-beta.55"
-  resolved "https://registry.yarnpkg.com/web3-eth-iban/-/web3-eth-iban-1.0.0-beta.55.tgz#15146a69de21addc99e7dbfb2920555b1e729637"
-  integrity sha512-a2Fxsb5Mssa+jiXgjUdIzJipE0175IcQXJbZLpKft2+zeSJWNTbaa3PQD2vPPpIM4W789q06N+f9Zc0Fyls+1g==
-  dependencies:
-    "@babel/runtime" "^7.3.1"
-    bn.js "4.11.8"
-    web3-utils "1.0.0-beta.55"
-
 web3-eth-iban@1.2.6:
   version "1.2.6"
   resolved "https://registry.yarnpkg.com/web3-eth-iban/-/web3-eth-iban-1.2.6.tgz#0b22191fd1aa6e27f7ef0820df75820bfb4ed46b"
@@ -15015,20 +14694,6 @@ web3-eth-iban@1.2.6:
     bn.js "4.11.8"
     web3-utils "1.2.6"
 
-web3-eth-personal@1.0.0-beta.55:
-  version "1.0.0-beta.55"
-  resolved "https://registry.yarnpkg.com/web3-eth-personal/-/web3-eth-personal-1.0.0-beta.55.tgz#76e9d2da1501ee3c686751e7c7df63cc11793a1d"
-  integrity sha512-H0mahLQx6Oj7lpgTamKAswr3rHChRUZijeWAar2Hj7BABQlLRKwx8n09nYhxggvvLYQNQS90JjvQue7rAo2LQQ==
-  dependencies:
-    "@babel/runtime" "^7.3.1"
-    web3-core "1.0.0-beta.55"
-    web3-core-helpers "1.0.0-beta.55"
-    web3-core-method "1.0.0-beta.55"
-    web3-eth-accounts "1.0.0-beta.55"
-    web3-net "1.0.0-beta.55"
-    web3-providers "1.0.0-beta.55"
-    web3-utils "1.0.0-beta.55"
-
 web3-eth-personal@1.2.6:
   version "1.2.6"
   resolved "https://registry.yarnpkg.com/web3-eth-personal/-/web3-eth-personal-1.2.6.tgz#47a0a0657ec04dd77f95451a6869d4751d324b6b"
@@ -15041,28 +14706,6 @@ web3-eth-personal@1.2.6:
     web3-net "1.2.6"
     web3-utils "1.2.6"
 
-web3-eth@1.0.0-beta.55:
-  version "1.0.0-beta.55"
-  resolved "https://registry.yarnpkg.com/web3-eth/-/web3-eth-1.0.0-beta.55.tgz#bb52150df0a77bd13511449a53793d4eb23ade6e"
-  integrity sha512-F3zJ9I1gOgQdNGfi2Dy2lmj6OqCMJoRN01XHhQZagq0HY1JYMfObtfMi5E3L+qsegsSddHbqp4YY57tKx6uxpA==
-  dependencies:
-    "@babel/runtime" "^7.3.1"
-    ethereumjs-tx "^1.3.7"
-    rxjs "^6.4.0"
-    web3-core "1.0.0-beta.55"
-    web3-core-helpers "1.0.0-beta.55"
-    web3-core-method "1.0.0-beta.55"
-    web3-core-subscriptions "1.0.0-beta.55"
-    web3-eth-abi "1.0.0-beta.55"
-    web3-eth-accounts "1.0.0-beta.55"
-    web3-eth-contract "1.0.0-beta.55"
-    web3-eth-ens "1.0.0-beta.55"
-    web3-eth-iban "1.0.0-beta.55"
-    web3-eth-personal "1.0.0-beta.55"
-    web3-net "1.0.0-beta.55"
-    web3-providers "1.0.0-beta.55"
-    web3-utils "1.0.0-beta.55"
-
 web3-eth@1.2.6:
   version "1.2.6"
   resolved "https://registry.yarnpkg.com/web3-eth/-/web3-eth-1.2.6.tgz#15a8c65fdde0727872848cae506758d302d8d046"
@@ -15082,19 +14725,6 @@ web3-eth@1.2.6:
     web3-net "1.2.6"
     web3-utils "1.2.6"
 
-web3-net@1.0.0-beta.55:
-  version "1.0.0-beta.55"
-  resolved "https://registry.yarnpkg.com/web3-net/-/web3-net-1.0.0-beta.55.tgz#daf24323df16a890a0bac6c6eda48b6e8c7e96ef"
-  integrity sha512-do2WY8+/GArJSWX7k/zZ7nBnV9Y3n6LhPYkwT3LeFqDzD515bKwlomaNC8hOaTc6UQyXIoPprYTK2FevL7jrZw==
-  dependencies:
-    "@babel/runtime" "^7.3.1"
-    lodash "^4.17.11"
-    web3-core "1.0.0-beta.55"
-    web3-core-helpers "1.0.0-beta.55"
-    web3-core-method "1.0.0-beta.55"
-    web3-providers "1.0.0-beta.55"
-    web3-utils "1.0.0-beta.55"
-
 web3-net@1.2.6:
   version "1.2.6"
   resolved "https://registry.yarnpkg.com/web3-net/-/web3-net-1.2.6.tgz#035ca0fbe55282fda848ca17ebb4c8966147e5ea"
@@ -15158,37 +14788,6 @@ web3-providers-ws@1.2.6:
     underscore "1.9.1"
     web3-core-helpers "1.2.6"
 
-web3-providers@1.0.0-beta.55:
-  version "1.0.0-beta.55"
-  resolved "https://registry.yarnpkg.com/web3-providers/-/web3-providers-1.0.0-beta.55.tgz#639503517741b69baaa82f1f940630df6a25992b"
-  integrity sha512-MNifc7W+iF6rykpbDR1MuX152jshWdZXHAU9Dk0Ja2/23elhIs4nCWs7wOX9FHrKgdrQbscPoq0uy+0aGzyWVQ==
-  dependencies:
-    "@babel/runtime" "^7.3.1"
-    "@types/node" "^10.12.18"
-    eventemitter3 "3.1.0"
-    lodash "^4.17.11"
-    url-parse "1.4.4"
-    web3-core "1.0.0-beta.55"
-    web3-core-helpers "1.0.0-beta.55"
-    web3-core-method "1.0.0-beta.55"
-    web3-utils "1.0.0-beta.55"
-    websocket "^1.0.28"
-    xhr2-cookies "1.1.0"
-
-web3-shh@1.0.0-beta.55:
-  version "1.0.0-beta.55"
-  resolved "https://registry.yarnpkg.com/web3-shh/-/web3-shh-1.0.0-beta.55.tgz#56f152ebcefb791dab86d2e6f1c296f8c1553644"
-  integrity sha512-lGP2HQ/1ThNnfoU8677aL48KsTx4Ht+2KQIn39dGpxVZqysQmovQIltbymVnAr4h8wofwcEz46iNHGa+PAyNzA==
-  dependencies:
-    "@babel/runtime" "^7.3.1"
-    web3-core "1.0.0-beta.55"
-    web3-core-helpers "1.0.0-beta.55"
-    web3-core-method "1.0.0-beta.55"
-    web3-core-subscriptions "1.0.0-beta.55"
-    web3-net "1.0.0-beta.55"
-    web3-providers "1.0.0-beta.55"
-    web3-utils "1.0.0-beta.55"
-
 web3-shh@1.2.6:
   version "1.2.6"
   resolved "https://registry.yarnpkg.com/web3-shh/-/web3-shh-1.2.6.tgz#2492616da4cac32d4c7534b890f43bac63190c14"
@@ -15199,22 +14798,6 @@ web3-shh@1.2.6:
     web3-core-subscriptions "1.2.6"
     web3-net "1.2.6"
 
-web3-utils@1.0.0-beta.55:
-  version "1.0.0-beta.55"
-  resolved "https://registry.yarnpkg.com/web3-utils/-/web3-utils-1.0.0-beta.55.tgz#beb40926b7c04208b752d36a9bc959d27a04b308"
-  integrity sha512-ASWqUi8gtWK02Tp8ZtcoAbHenMpQXNvHrakgzvqTNNZn26wgpv+Q4mdPi0KOR6ZgHFL8R/9b5BBoUTglS1WPpg==
-  dependencies:
-    "@babel/runtime" "^7.3.1"
-    "@types/bn.js" "^4.11.4"
-    "@types/node" "^10.12.18"
-    bn.js "4.11.8"
-    eth-lib "0.2.8"
-    ethjs-unit "^0.1.6"
-    lodash "^4.17.11"
-    number-to-bn "1.7.0"
-    randombytes "^2.1.0"
-    utf8 "2.1.1"
-
 web3-utils@1.2.6, web3-utils@^1.2.1, web3-utils@^1.2.2:
   version "1.2.6"
   resolved "https://registry.yarnpkg.com/web3-utils/-/web3-utils-1.2.6.tgz#b9a25432da00976457fcc1094c4af8ac6d486db9"
@@ -15229,21 +14812,6 @@ web3-utils@1.2.6, web3-utils@^1.2.1, web3-utils@^1.2.2:
     underscore "1.9.1"
     utf8 "3.0.0"
 
-web3@1.0.0-beta.55:
-  version "1.0.0-beta.55"
-  resolved "https://registry.yarnpkg.com/web3/-/web3-1.0.0-beta.55.tgz#8845075129299da172c2eb41a748c8a87c2a2b5a"
-  integrity sha512-yJpwy4IUA3T/F9hWzYQVn0GbJCrAaZ0KTIO3iuqkhaYH0Y09KV7k4GzFi4hN7hT4cFTj4yIKaeVCwQ5kzvi2Vg==
-  dependencies:
-    "@babel/runtime" "^7.3.1"
-    "@types/node" "^10.12.18"
-    web3-core "1.0.0-beta.55"
-    web3-eth "1.0.0-beta.55"
-    web3-eth-personal "1.0.0-beta.55"
-    web3-net "1.0.0-beta.55"
-    web3-providers "1.0.0-beta.55"
-    web3-shh "1.0.0-beta.55"
-    web3-utils "1.0.0-beta.55"
-
 web3@^1.2.1, web3@^1.2.2:
   version "1.2.6"
   resolved "https://registry.yarnpkg.com/web3/-/web3-1.2.6.tgz#c497dcb14cdd8d6d9fb6b445b3b68ff83f8ccf68"
@@ -15406,17 +14974,6 @@ websocket-extensions@>=0.1.1:
   resolved "https://registry.yarnpkg.com/websocket-extensions/-/websocket-extensions-0.1.3.tgz#5d2ff22977003ec687a4b87073dfbbac146ccf29"
   integrity sha512-nqHUnMXmBzT0w570r2JpJxfiSD1IzoI+HGVdd3aZ0yNi3ngvQ4jv1dtHt5VGxfI2yj5yqImPhOK4vmIh2xMbGg==
 
-websocket@^1.0.28:
-  version "1.0.31"
-  resolved "https://registry.yarnpkg.com/websocket/-/websocket-1.0.31.tgz#e5d0f16c3340ed87670e489ecae6144c79358730"
-  integrity sha512-VAouplvGKPiKFDTeCCO65vYHsyay8DqoBSlzIO3fayrfOgU94lQN5a1uWVnFrMLceTJw/+fQXR5PGbUVRaHshQ==
-  dependencies:
-    debug "^2.2.0"
-    es5-ext "^0.10.50"
-    nan "^2.14.0"
-    typedarray-to-buffer "^3.1.5"
-    yaeti "^0.0.6"
-
 whatwg-encoding@^1.0.1, whatwg-encoding@^1.0.3, whatwg-encoding@^1.0.5:
   version "1.0.5"
   resolved "https://registry.yarnpkg.com/whatwg-encoding/-/whatwg-encoding-1.0.5.tgz#5abacf777c32166a51d085d6b4f3e7d27113ddb0"
@@ -15924,8 +15481,3 @@ yauzl@^2.4.2:
   dependencies:
     buffer-crc32 "~0.2.3"
     fd-slicer "~1.1.0"
-
-yn@3.1.1:
-  version "3.1.1"
-  resolved "https://registry.yarnpkg.com/yn/-/yn-3.1.1.tgz#1e87401a09d767c1d5eab26a6e4c185182d2eb50"
-  integrity sha512-Ux4ygGWsu2c7isFWe8Yu1YluJmqVhxqK2cLXNQA5AcC3QfbGNpM7fu0Y8b/z16pXLnFxZYvWhd3fhBY9DLmC6Q==