diff --git a/contracts/UFragments.sol b/contracts/UFragments.sol
index 260ad682..c9a01910 100644
--- a/contracts/UFragments.sol
+++ b/contracts/UFragments.sol
@@ -76,6 +76,21 @@ contract UFragments is ERC20Detailed, Ownable {
     // it's fully paid.
     mapping(address => mapping(address => uint256)) private _allowedFragments;
 
+    // EIP-2612: permit – 712-signed approvals
+    // https://eips.ethereum.org/EIPS/eip-2612
+    string public constant EIP712_REVISION = "1";
+    bytes32 public constant EIP712_DOMAIN =
+        keccak256(
+            "EIP712Domain(string name,string version,uint256 chainId,address verifyingContract)"
+        );
+    bytes32 public constant PERMIT_TYPEHASH =
+        keccak256(
+            "Permit(address owner,address spender,uint256 value,uint256 nonce,uint256 deadline)"
+        );
+
+    // EIP-2612: keeps track of number of permits per address
+    mapping(address => uint256) private _nonces;
+
     /**
      * @param monetaryPolicy_ The address of the monetary policy contract to use for authentication.
      */
@@ -174,6 +189,35 @@ contract UFragments is ERC20Detailed, Ownable {
         return TOTAL_GONS;
     }
 
+    /**
+     * @return The number of successful permits by the specified address.
+     */
+    function nonces(address who) public view returns (uint256) {
+        return _nonces[who];
+    }
+
+    /**
+     * @return The computed DOMAIN_SEPARATOR to be used off-chain services
+     *         which implement EIP-712.
+     *         https://eips.ethereum.org/EIPS/eip-2612
+     */
+    function DOMAIN_SEPARATOR() public view returns (bytes32) {
+        uint256 chainId;
+        assembly {
+            chainId := chainid()
+        }
+        return
+            keccak256(
+                abi.encode(
+                    EIP712_DOMAIN,
+                    keccak256(bytes(name())),
+                    keccak256(bytes(EIP712_REVISION)),
+                    chainId,
+                    address(this)
+                )
+            );
+    }
+
     /**
      * @dev Transfer tokens to a specified address.
      * @param to The address to transfer to.
@@ -326,4 +370,39 @@ contract UFragments is ERC20Detailed, Ownable {
 
         return true;
     }
+
+    /**
+     * @dev Allows for approvals to be made via secp256k1 signatures.
+     * @param owner The owner of the funds
+     * @param spender The spender
+     * @param value The amount
+     * @param deadline The deadline timestamp, type(uint256).max for max deadline
+     * @param v Signature param
+     * @param s Signature param
+     * @param r Signature param
+     */
+    function permit(
+        address owner,
+        address spender,
+        uint256 value,
+        uint256 deadline,
+        uint8 v,
+        bytes32 r,
+        bytes32 s
+    ) public {
+        require(block.timestamp <= deadline);
+
+        uint256 ownerNonce = _nonces[owner];
+        bytes32 permitDataDigest =
+            keccak256(abi.encode(PERMIT_TYPEHASH, owner, spender, value, ownerNonce, deadline));
+        bytes32 digest =
+            keccak256(abi.encodePacked("\x19\x01", DOMAIN_SEPARATOR(), permitDataDigest));
+
+        require(owner == ecrecover(digest, v, r, s));
+
+        _nonces[owner] = ownerNonce.add(1);
+
+        _allowedFragments[owner][spender] = value;
+        emit Approval(owner, spender, value);
+    }
 }
diff --git a/package.json b/package.json
index 5a81c12a..aab21d4e 100644
--- a/package.json
+++ b/package.json
@@ -39,7 +39,8 @@
     "bignumber.js": "^9.0.0",
     "chai": "^4.2.0",
     "ethereum-waffle": "^3.2.1",
-    "ethers": "^5.0.24",
+    "ethereumjs-util": "^7.0.7",
+    "ethers": "5.0.18",
     "hardhat": "^2.0.6",
     "pre-commit": "^1.2.2",
     "prettier": "^2.1.1",
diff --git a/test/unit/UFragments_erc20_permit.ts b/test/unit/UFragments_erc20_permit.ts
new file mode 100644
index 00000000..176c0433
--- /dev/null
+++ b/test/unit/UFragments_erc20_permit.ts
@@ -0,0 +1,177 @@
+import { network, ethers, upgrades } from 'hardhat'
+import { Contract, Signer, Wallet, BigNumber } from 'ethers'
+import { expect } from 'chai'
+
+import {
+  EIP712_DOMAIN_TYPEHASH,
+  EIP2612_PERMIT_TYPEHASH,
+  getDomainSeparator,
+  signEIP712Permission,
+} from '../utils/signatures'
+
+let accounts: Signer[],
+  deployer: Signer,
+  deployerAddress: string,
+  owner: Wallet,
+  ownerAddress: string,
+  spender: Wallet,
+  spenderAddress: string,
+  uFragments: Contract,
+  initialSupply: BigNumber
+
+async function setupContracts() {
+  // prepare signers
+  accounts = await ethers.getSigners()
+  deployer = accounts[0]
+  deployerAddress = await deployer.getAddress()
+
+  owner = Wallet.createRandom()
+  ownerAddress = await owner.getAddress()
+
+  spender = Wallet.createRandom()
+  spenderAddress = await spender.getAddress()
+
+  // deploy upgradable token
+  const factory = await ethers.getContractFactory('UFragments')
+  uFragments = await upgrades.deployProxy(factory, [deployerAddress], {
+    initializer: 'initialize(address)',
+  })
+  // fetch initial supply
+  initialSupply = await uFragments.totalSupply()
+}
+
+// https://eips.ethereum.org/EIPS/eip-2612
+// Test cases as in:
+// https://github.com/OpenZeppelin/openzeppelin-contracts/blob/master/test/drafts/ERC20Permit.test.js
+describe('UFragments:Initialization', () => {
+  before('setup UFragments contract', setupContracts)
+
+  it('should set the EIP2612 parameters', async function () {
+    expect(await uFragments.EIP712_REVISION()).to.eq('1')
+    expect(await uFragments.EIP712_DOMAIN()).to.eq(EIP712_DOMAIN_TYPEHASH)
+    expect(await uFragments.PERMIT_TYPEHASH()).to.eq(EIP2612_PERMIT_TYPEHASH)
+    // with hard-coded parameters
+    expect(await uFragments.DOMAIN_SEPARATOR()).to.eq(
+      getDomainSeparator(
+        await uFragments.EIP712_REVISION(),
+        await uFragments.name(),
+        uFragments.address,
+        network.config.chainId || 1,
+      ),
+    )
+  })
+
+  it('initial nonce is 0', async function () {
+    expect(await uFragments.nonces(deployerAddress)).to.eq('0')
+    expect(await uFragments.nonces(ownerAddress)).to.eq('0')
+    expect(await uFragments.nonces(spenderAddress)).to.eq('0')
+  })
+})
+
+// Using the cases specified by:
+// https://github.com/OpenZeppelin/openzeppelin-contracts/blob/master/test/drafts/ERC20Permit.test.js
+describe('UFragments:EIP-2612 Permit', () => {
+  const MAX_DEADLINE = BigNumber.from(2).pow(256).sub(1)
+
+  beforeEach('setup UFragments contract', setupContracts)
+
+  describe('permit', function () {
+    const signPermission = async (
+      signer: Wallet,
+      owner: string,
+      spender: string,
+      value: number,
+      nonce: number,
+      deadline: BigNumber,
+    ) => {
+      return signEIP712Permission(
+        await uFragments.EIP712_REVISION(),
+        await uFragments.name(),
+        uFragments.address,
+        network.config.chainId || 1,
+        signer,
+        owner,
+        spender,
+        value,
+        nonce,
+        deadline,
+      )
+    }
+
+    it('accepts owner signature', async function () {
+      const { v, r, s } = await signPermission(
+        owner,
+        ownerAddress,
+        spenderAddress,
+        123,
+        0,
+        MAX_DEADLINE,
+      )
+      await expect(
+        uFragments
+          .connect(deployer)
+          .permit(ownerAddress, spenderAddress, 123, MAX_DEADLINE, v, r, s),
+      )
+        .to.emit(uFragments, 'Approval')
+        .withArgs(ownerAddress, spenderAddress, '123')
+      expect(await uFragments.nonces(ownerAddress)).to.eq('1')
+      expect(await uFragments.allowance(ownerAddress, spenderAddress)).to.eq(
+        '123',
+      )
+    })
+
+    it('rejects reused signature', async function () {
+      const { v, r, s } = await signPermission(
+        owner,
+        ownerAddress,
+        spenderAddress,
+        123,
+        0,
+        MAX_DEADLINE,
+      )
+      await uFragments
+        .connect(deployer)
+        .permit(ownerAddress, spenderAddress, 123, MAX_DEADLINE, v, r, s)
+      await expect(
+        uFragments
+          .connect(deployer)
+          .permit(ownerAddress, spenderAddress, 123, MAX_DEADLINE, v, r, s),
+      ).to.be.reverted
+    })
+
+    it('rejects other signature', async function () {
+      const { v, r, s } = await signPermission(
+        spender,
+        ownerAddress,
+        spenderAddress,
+        123,
+        0,
+        MAX_DEADLINE,
+      )
+      await expect(
+        uFragments
+          .connect(deployer)
+          .permit(ownerAddress, spenderAddress, 123, MAX_DEADLINE, v, r, s),
+      ).to.be.reverted
+    })
+
+    it('rejects expired permit', async function () {
+      const currentTs = (await ethers.provider.getBlock('latest')).timestamp
+      const olderTs = currentTs - 3600 * 24 * 7
+      const deadline = BigNumber.from(olderTs)
+      const { v, r, s } = await signPermission(
+        owner,
+        ownerAddress,
+        spenderAddress,
+        123,
+        0,
+        deadline,
+      )
+      await expect(
+        uFragments
+          .connect(deployer)
+          .permit(ownerAddress, spenderAddress, 123, deadline, v, r, s),
+      ).to.be.reverted
+    })
+  })
+})
diff --git a/test/utils/signatures.ts b/test/utils/signatures.ts
new file mode 100644
index 00000000..2ec32e80
--- /dev/null
+++ b/test/utils/signatures.ts
@@ -0,0 +1,121 @@
+// https://github.com/albertocuestacanada/ERC20Permit/blob/master/utils/signatures.ts
+import {
+  keccak256,
+  defaultAbiCoder,
+  toUtf8Bytes,
+  solidityPack,
+  splitSignature,
+} from 'ethers/lib/utils'
+import { ecsign } from 'ethereumjs-util'
+import { BigNumberish, Wallet } from 'ethers'
+
+export const EIP712_DOMAIN_TYPEHASH = keccak256(
+  toUtf8Bytes(
+    'EIP712Domain(string name,string version,uint256 chainId,address verifyingContract)',
+  ),
+)
+
+export const EIP712_DOMAIN_TYPE = [
+  { name: 'name', type: 'string' },
+  { name: 'version', type: 'string' },
+  { name: 'chainId', type: 'uint256' },
+  { name: 'verifyingContract', type: 'address' },
+]
+
+export const EIP2612_PERMIT_TYPEHASH = keccak256(
+  toUtf8Bytes(
+    'Permit(address owner,address spender,uint256 value,uint256 nonce,uint256 deadline)',
+  ),
+)
+
+export const EIP2612_PERMIT_TYPE = [
+  { name: 'owner', type: 'address' },
+  { name: 'spender', type: 'address' },
+  { name: 'value', type: 'uint256' },
+  { name: 'nonce', type: 'uint256' },
+  { name: 'deadline', type: 'uint256' },
+]
+
+// Gets the EIP712 domain separator
+export function getDomainSeparator(
+  version: string,
+  name: string,
+  contractAddress: string,
+  chainId: number,
+) {
+  return keccak256(
+    defaultAbiCoder.encode(
+      ['bytes32', 'bytes32', 'bytes32', 'uint256', 'address'],
+      [
+        EIP712_DOMAIN_TYPEHASH,
+        keccak256(toUtf8Bytes(name)),
+        keccak256(toUtf8Bytes(version)),
+        chainId,
+        contractAddress,
+      ],
+    ),
+  )
+}
+
+// Returns the EIP712 hash which should be signed by the user
+// in order to make a call to `permit`
+export function getPermitDigest(
+  version: string,
+  name: string,
+  address: string,
+  chainId: number,
+  owner: string,
+  spender: string,
+  value: number,
+  nonce: number,
+  deadline: BigNumberish,
+) {
+  const DOMAIN_SEPARATOR = getDomainSeparator(version, name, address, chainId)
+  const permitHash = keccak256(
+    defaultAbiCoder.encode(
+      ['bytes32', 'address', 'address', 'uint256', 'uint256', 'uint256'],
+      [EIP2612_PERMIT_TYPEHASH, owner, spender, value, nonce, deadline],
+    ),
+  )
+  const hash = keccak256(
+    solidityPack(
+      ['bytes1', 'bytes1', 'bytes32', 'bytes32'],
+      ['0x19', '0x01', DOMAIN_SEPARATOR, permitHash],
+    ),
+  )
+  return hash
+}
+
+export const signEIP712Permission = async (
+  version: string,
+  name: string,
+  verifyingContract: string,
+  chainId: number,
+  signer: Wallet,
+  owner: string,
+  spender: string,
+  value: number,
+  nonce: number,
+  deadline: BigNumberish,
+) => {
+  const domain = {
+    name,
+    version,
+    chainId,
+    verifyingContract,
+  }
+
+  const types = { Permit: EIP2612_PERMIT_TYPE }
+
+  const data = {
+    owner,
+    spender,
+    value,
+    nonce,
+    deadline,
+  }
+
+  const signature = await signer._signTypedData(domain, types, data)
+
+  return splitSignature(signature)
+}
diff --git a/yarn.lock b/yarn.lock
index 370ed7ce..83a9ff31 100644
--- a/yarn.lock
+++ b/yarn.lock
@@ -104,6 +104,21 @@
     "@ethersproject/properties" ">=5.0.0-beta.131"
     "@ethersproject/strings" ">=5.0.0-beta.130"
 
+"@ethersproject/abi@5.0.7":
+  version "5.0.7"
+  resolved "https://registry.yarnpkg.com/@ethersproject/abi/-/abi-5.0.7.tgz#79e52452bd3ca2956d0e1c964207a58ad1a0ee7b"
+  integrity sha512-Cqktk+hSIckwP/W8O47Eef60VwmoSC/L3lY0+dIBhQPCNn9E4V7rwmm2aFrNRRDJfFlGuZ1khkQUOc3oBX+niw==
+  dependencies:
+    "@ethersproject/address" "^5.0.4"
+    "@ethersproject/bignumber" "^5.0.7"
+    "@ethersproject/bytes" "^5.0.4"
+    "@ethersproject/constants" "^5.0.4"
+    "@ethersproject/hash" "^5.0.4"
+    "@ethersproject/keccak256" "^5.0.3"
+    "@ethersproject/logger" "^5.0.5"
+    "@ethersproject/properties" "^5.0.3"
+    "@ethersproject/strings" "^5.0.4"
+
 "@ethersproject/abi@5.0.9", "@ethersproject/abi@^5.0.1", "@ethersproject/abi@^5.0.5":
   version "5.0.9"
   resolved "https://registry.yarnpkg.com/@ethersproject/abi/-/abi-5.0.9.tgz#738c1c557e56d8f395a5a27caef9b0449bc85a10"
@@ -134,6 +149,19 @@
     "@ethersproject/properties" "^5.0.7"
     "@ethersproject/strings" "^5.0.8"
 
+"@ethersproject/abstract-provider@5.0.5":
+  version "5.0.5"
+  resolved "https://registry.yarnpkg.com/@ethersproject/abstract-provider/-/abstract-provider-5.0.5.tgz#797a32a8707830af1ad8f833e9c228994d5572b9"
+  integrity sha512-i/CjElAkzV7vQBAeoz+IpjGfcFYEP9eD7j3fzZ0fzTq03DO7PPnR+xkEZ1IoDXGwDS+55aLM1xvLDwB/Lx6IOQ==
+  dependencies:
+    "@ethersproject/bignumber" "^5.0.7"
+    "@ethersproject/bytes" "^5.0.4"
+    "@ethersproject/logger" "^5.0.5"
+    "@ethersproject/networks" "^5.0.3"
+    "@ethersproject/properties" "^5.0.3"
+    "@ethersproject/transactions" "^5.0.5"
+    "@ethersproject/web" "^5.0.6"
+
 "@ethersproject/abstract-provider@5.0.7", "@ethersproject/abstract-provider@^5.0.4":
   version "5.0.7"
   resolved "https://registry.yarnpkg.com/@ethersproject/abstract-provider/-/abstract-provider-5.0.7.tgz#04ee3bfe43323384e7fecf6c774975b8dec4bdc9"
@@ -160,6 +188,17 @@
     "@ethersproject/transactions" "^5.0.9"
     "@ethersproject/web" "^5.0.12"
 
+"@ethersproject/abstract-signer@5.0.7":
+  version "5.0.7"
+  resolved "https://registry.yarnpkg.com/@ethersproject/abstract-signer/-/abstract-signer-5.0.7.tgz#cdbd3bd479edf77c71b7f6a6156b0275b1176ded"
+  integrity sha512-8W8gy/QutEL60EoMEpvxZ8MFAEWs/JvH5nmZ6xeLXoZvmBCasGmxqHdYjo2cxg0nevkPkq9SeenSsBBZSCx+SQ==
+  dependencies:
+    "@ethersproject/abstract-provider" "^5.0.4"
+    "@ethersproject/bignumber" "^5.0.7"
+    "@ethersproject/bytes" "^5.0.4"
+    "@ethersproject/logger" "^5.0.5"
+    "@ethersproject/properties" "^5.0.3"
+
 "@ethersproject/abstract-signer@5.0.9", "@ethersproject/abstract-signer@^5.0.4", "@ethersproject/abstract-signer@^5.0.6":
   version "5.0.9"
   resolved "https://registry.yarnpkg.com/@ethersproject/abstract-signer/-/abstract-signer-5.0.9.tgz#238ddc06031aeb9dfceee2add965292d7dd1acbf"
@@ -182,6 +221,18 @@
     "@ethersproject/logger" "^5.0.8"
     "@ethersproject/properties" "^5.0.7"
 
+"@ethersproject/address@5.0.5":
+  version "5.0.5"
+  resolved "https://registry.yarnpkg.com/@ethersproject/address/-/address-5.0.5.tgz#2caa65f6b7125015395b1b54c985ee0b27059cc7"
+  integrity sha512-DpkQ6rwk9jTefrRsJzEm6nhRiJd9pvhn1xN0rw5N/jswXG5r7BLk/GVA0mMAVWAsYfvi2xSc5L41FMox43RYEA==
+  dependencies:
+    "@ethersproject/bignumber" "^5.0.7"
+    "@ethersproject/bytes" "^5.0.4"
+    "@ethersproject/keccak256" "^5.0.3"
+    "@ethersproject/logger" "^5.0.5"
+    "@ethersproject/rlp" "^5.0.3"
+    bn.js "^4.4.0"
+
 "@ethersproject/address@5.0.8", "@ethersproject/address@>=5.0.0-beta.128", "@ethersproject/address@^5.0.4", "@ethersproject/address@^5.0.5":
   version "5.0.8"
   resolved "https://registry.yarnpkg.com/@ethersproject/address/-/address-5.0.8.tgz#0c551659144a5a7643c6bea337149d410825298f"
@@ -204,6 +255,13 @@
     "@ethersproject/logger" "^5.0.8"
     "@ethersproject/rlp" "^5.0.7"
 
+"@ethersproject/base64@5.0.4":
+  version "5.0.4"
+  resolved "https://registry.yarnpkg.com/@ethersproject/base64/-/base64-5.0.4.tgz#b0d8fdbf3dda977cf546dcd35725a7b1d5256caa"
+  integrity sha512-4KRykQ7BQMeOXfvio1YITwHjxwBzh92UoXIdzxDE1p53CK28bbHPdsPNYo0wl0El7lJAMpT2SOdL0hhbWRnyIA==
+  dependencies:
+    "@ethersproject/bytes" "^5.0.4"
+
 "@ethersproject/base64@5.0.6", "@ethersproject/base64@^5.0.3":
   version "5.0.6"
   resolved "https://registry.yarnpkg.com/@ethersproject/base64/-/base64-5.0.6.tgz#26311ebf29ea3d0b9c300ccf3e1fdc44b7481516"
@@ -218,6 +276,14 @@
   dependencies:
     "@ethersproject/bytes" "^5.0.9"
 
+"@ethersproject/basex@5.0.4":
+  version "5.0.4"
+  resolved "https://registry.yarnpkg.com/@ethersproject/basex/-/basex-5.0.4.tgz#93e1cd11f9a47281da2389de24f88e13e9d90847"
+  integrity sha512-ixIr/kKiAoSzOnSc777AGIOAhKai5Ivqr4HO/Gz+YG+xkfv6kqD6AW4ga9vM20Wwb0QBhh3LoRWTu4V1K+x9Ew==
+  dependencies:
+    "@ethersproject/bytes" "^5.0.4"
+    "@ethersproject/properties" "^5.0.3"
+
 "@ethersproject/basex@5.0.6", "@ethersproject/basex@^5.0.3":
   version "5.0.6"
   resolved "https://registry.yarnpkg.com/@ethersproject/basex/-/basex-5.0.6.tgz#ab95c32e48288a3d868726463506641cb1e9fb6b"
@@ -235,6 +301,15 @@
     "@ethersproject/logger" "^5.0.5"
     bn.js "^4.4.0"
 
+"@ethersproject/bignumber@5.0.8":
+  version "5.0.8"
+  resolved "https://registry.yarnpkg.com/@ethersproject/bignumber/-/bignumber-5.0.8.tgz#cee33bd8eb0266176def0d371b45274b1d2c4ec0"
+  integrity sha512-KXFVAFKS1jdTXYN8BE5Oj+ZfPMh28iRdFeNGBVT6cUFdtiPVqeXqc0ggvBqA3A1VoFFGgM7oAeaagA393aORHA==
+  dependencies:
+    "@ethersproject/bytes" "^5.0.4"
+    "@ethersproject/logger" "^5.0.5"
+    bn.js "^4.4.0"
+
 "@ethersproject/bignumber@^5.0.13":
   version "5.0.13"
   resolved "https://registry.yarnpkg.com/@ethersproject/bignumber/-/bignumber-5.0.13.tgz#a5466412b3b80104097b9c694f6ae827df4353fe"
@@ -244,6 +319,13 @@
     "@ethersproject/logger" "^5.0.8"
     bn.js "^4.4.0"
 
+"@ethersproject/bytes@5.0.5":
+  version "5.0.5"
+  resolved "https://registry.yarnpkg.com/@ethersproject/bytes/-/bytes-5.0.5.tgz#688b70000e550de0c97a151a21f15b87d7f97d7c"
+  integrity sha512-IEj9HpZB+ACS6cZ+QQMTqmu/cnUK2fYNE6ms/PVxjoBjoxc6HCraLpam1KuRvreMy0i523PLmjN8OYeikRdcUQ==
+  dependencies:
+    "@ethersproject/logger" "^5.0.5"
+
 "@ethersproject/bytes@5.0.8", "@ethersproject/bytes@>=5.0.0-beta.129", "@ethersproject/bytes@^5.0.4", "@ethersproject/bytes@^5.0.8":
   version "5.0.8"
   resolved "https://registry.yarnpkg.com/@ethersproject/bytes/-/bytes-5.0.8.tgz#cf1246a6a386086e590063a4602b1ffb6cc43db1"
@@ -258,6 +340,13 @@
   dependencies:
     "@ethersproject/logger" "^5.0.8"
 
+"@ethersproject/constants@5.0.5":
+  version "5.0.5"
+  resolved "https://registry.yarnpkg.com/@ethersproject/constants/-/constants-5.0.5.tgz#0ed19b002e8404bdf6d135234dc86a7d9bcf9b71"
+  integrity sha512-foaQVmxp2+ik9FrLUCtVrLZCj4M3Ibgkqvh+Xw/vFRSerkjVSYePApaVE5essxhoSlF1U9oXfWY09QI2AXtgKA==
+  dependencies:
+    "@ethersproject/bignumber" "^5.0.7"
+
 "@ethersproject/constants@5.0.7", "@ethersproject/constants@>=5.0.0-beta.128", "@ethersproject/constants@^5.0.4":
   version "5.0.7"
   resolved "https://registry.yarnpkg.com/@ethersproject/constants/-/constants-5.0.7.tgz#44ff979e5781b17c8c6901266896c3ee745f4e7e"
@@ -272,6 +361,21 @@
   dependencies:
     "@ethersproject/bignumber" "^5.0.13"
 
+"@ethersproject/contracts@5.0.5":
+  version "5.0.5"
+  resolved "https://registry.yarnpkg.com/@ethersproject/contracts/-/contracts-5.0.5.tgz#64831a341ec8ca225e83ff3e9437c26b970fd5d7"
+  integrity sha512-tFI255lFbmbqMkgnuyhDWHl3yWqttPlReplYuVvDCT/SuvBjLR4ad2uipBlh1fh5X1ipK9ettAoV4S0HKim4Kw==
+  dependencies:
+    "@ethersproject/abi" "^5.0.5"
+    "@ethersproject/abstract-provider" "^5.0.4"
+    "@ethersproject/abstract-signer" "^5.0.4"
+    "@ethersproject/address" "^5.0.4"
+    "@ethersproject/bignumber" "^5.0.7"
+    "@ethersproject/bytes" "^5.0.4"
+    "@ethersproject/constants" "^5.0.4"
+    "@ethersproject/logger" "^5.0.5"
+    "@ethersproject/properties" "^5.0.3"
+
 "@ethersproject/contracts@5.0.8":
   version "5.0.8"
   resolved "https://registry.yarnpkg.com/@ethersproject/contracts/-/contracts-5.0.8.tgz#71d3ba16853a1555be2e161a6741df186f81c73b"
@@ -287,6 +391,20 @@
     "@ethersproject/logger" "^5.0.5"
     "@ethersproject/properties" "^5.0.3"
 
+"@ethersproject/hash@5.0.6":
+  version "5.0.6"
+  resolved "https://registry.yarnpkg.com/@ethersproject/hash/-/hash-5.0.6.tgz#2a2e8a1470685421217e9e86e9971ca636e609ce"
+  integrity sha512-Gvh57v6BWhwnud6l7tMfQm32PRQ2DYx2WaAAQmAxAfYvmzUkpQCBstnGeNMXIL8/2wdkvcB2u+WZRWaZtsFuUQ==
+  dependencies:
+    "@ethersproject/abstract-signer" "^5.0.6"
+    "@ethersproject/address" "^5.0.5"
+    "@ethersproject/bignumber" "^5.0.8"
+    "@ethersproject/bytes" "^5.0.4"
+    "@ethersproject/keccak256" "^5.0.3"
+    "@ethersproject/logger" "^5.0.5"
+    "@ethersproject/properties" "^5.0.4"
+    "@ethersproject/strings" "^5.0.4"
+
 "@ethersproject/hash@5.0.9", "@ethersproject/hash@>=5.0.0-beta.128", "@ethersproject/hash@^5.0.4":
   version "5.0.9"
   resolved "https://registry.yarnpkg.com/@ethersproject/hash/-/hash-5.0.9.tgz#81252a848185b584aa600db4a1a68cad9229a4d4"
@@ -315,6 +433,24 @@
     "@ethersproject/properties" "^5.0.7"
     "@ethersproject/strings" "^5.0.8"
 
+"@ethersproject/hdnode@5.0.5":
+  version "5.0.5"
+  resolved "https://registry.yarnpkg.com/@ethersproject/hdnode/-/hdnode-5.0.5.tgz#1f89aad0a5ba9dfae3a85a36e0669f8bc7a74781"
+  integrity sha512-Ho4HZaK+KijE5adayvjAGusWMnT0mgwGa5hGMBofBOgX9nqiKf6Wxx68SXBGI1/L3rmKo6mlAjxUd8gefs0teQ==
+  dependencies:
+    "@ethersproject/abstract-signer" "^5.0.4"
+    "@ethersproject/basex" "^5.0.3"
+    "@ethersproject/bignumber" "^5.0.7"
+    "@ethersproject/bytes" "^5.0.4"
+    "@ethersproject/logger" "^5.0.5"
+    "@ethersproject/pbkdf2" "^5.0.3"
+    "@ethersproject/properties" "^5.0.3"
+    "@ethersproject/sha2" "^5.0.3"
+    "@ethersproject/signing-key" "^5.0.4"
+    "@ethersproject/strings" "^5.0.4"
+    "@ethersproject/transactions" "^5.0.5"
+    "@ethersproject/wordlists" "^5.0.4"
+
 "@ethersproject/hdnode@5.0.7", "@ethersproject/hdnode@^5.0.4":
   version "5.0.7"
   resolved "https://registry.yarnpkg.com/@ethersproject/hdnode/-/hdnode-5.0.7.tgz#c7bce94a337ea65e37c46bab09a83e1c1a555d99"
@@ -333,6 +469,25 @@
     "@ethersproject/transactions" "^5.0.5"
     "@ethersproject/wordlists" "^5.0.4"
 
+"@ethersproject/json-wallets@5.0.7":
+  version "5.0.7"
+  resolved "https://registry.yarnpkg.com/@ethersproject/json-wallets/-/json-wallets-5.0.7.tgz#4c48753b38ce7bce23a55f25c23f24617cf560e5"
+  integrity sha512-dgOn9JtGgjT28mDXs4LYY2rT4CzS6bG/rxoYuPq3TLHIf6nmvBcr33Fee6RrM/y8UAx4gyIkf6wb2cXsOctvQQ==
+  dependencies:
+    "@ethersproject/abstract-signer" "^5.0.4"
+    "@ethersproject/address" "^5.0.4"
+    "@ethersproject/bytes" "^5.0.4"
+    "@ethersproject/hdnode" "^5.0.4"
+    "@ethersproject/keccak256" "^5.0.3"
+    "@ethersproject/logger" "^5.0.5"
+    "@ethersproject/pbkdf2" "^5.0.3"
+    "@ethersproject/properties" "^5.0.3"
+    "@ethersproject/random" "^5.0.3"
+    "@ethersproject/strings" "^5.0.4"
+    "@ethersproject/transactions" "^5.0.5"
+    aes-js "3.0.0"
+    scrypt-js "3.0.1"
+
 "@ethersproject/json-wallets@5.0.9", "@ethersproject/json-wallets@^5.0.6":
   version "5.0.9"
   resolved "https://registry.yarnpkg.com/@ethersproject/json-wallets/-/json-wallets-5.0.9.tgz#2e1708c2854c4ab764e35920bd1f44c948b95434"
@@ -352,6 +507,14 @@
     aes-js "3.0.0"
     scrypt-js "3.0.1"
 
+"@ethersproject/keccak256@5.0.4":
+  version "5.0.4"
+  resolved "https://registry.yarnpkg.com/@ethersproject/keccak256/-/keccak256-5.0.4.tgz#36ca0a7d1ae2a272da5654cb886776d0c680ef3a"
+  integrity sha512-GNpiOUm9PGUxFNqOxYKDQBM0u68bG9XC9iOulEQ8I0tOx/4qUpgVzvgXL6ugxr0RY554Gz/NQsVqknqPzUcxpQ==
+  dependencies:
+    "@ethersproject/bytes" "^5.0.4"
+    js-sha3 "0.5.7"
+
 "@ethersproject/keccak256@5.0.6", "@ethersproject/keccak256@>=5.0.0-beta.127", "@ethersproject/keccak256@^5.0.3":
   version "5.0.6"
   resolved "https://registry.yarnpkg.com/@ethersproject/keccak256/-/keccak256-5.0.6.tgz#5b5ba715ef1be86efde5c271f896fa0daf0e1efe"
@@ -368,11 +531,23 @@
     "@ethersproject/bytes" "^5.0.9"
     js-sha3 "0.5.7"
 
+"@ethersproject/logger@5.0.6":
+  version "5.0.6"
+  resolved "https://registry.yarnpkg.com/@ethersproject/logger/-/logger-5.0.6.tgz#faa484203e86e08be9e07fef826afeef7183fe88"
+  integrity sha512-FrX0Vnb3JZ1md/7GIZfmJ06XOAA8r3q9Uqt9O5orr4ZiksnbpXKlyDzQtlZ5Yv18RS8CAUbiKH9vwidJg1BPmQ==
+
 "@ethersproject/logger@5.0.8", "@ethersproject/logger@>=5.0.0-beta.129", "@ethersproject/logger@^5.0.5", "@ethersproject/logger@^5.0.8":
   version "5.0.8"
   resolved "https://registry.yarnpkg.com/@ethersproject/logger/-/logger-5.0.8.tgz#135c1903d35c878265f3cbf2b287042c4c20d5d4"
   integrity sha512-SkJCTaVTnaZ3/ieLF5pVftxGEFX56pTH+f2Slrpv7cU0TNpUZNib84QQdukd++sWUp/S7j5t5NW+WegbXd4U/A==
 
+"@ethersproject/networks@5.0.4":
+  version "5.0.4"
+  resolved "https://registry.yarnpkg.com/@ethersproject/networks/-/networks-5.0.4.tgz#6d320a5e15a0cda804f5da88be0ba846156f6eec"
+  integrity sha512-/wHDTRms5mpJ09BoDrbNdFWINzONe05wZRgohCXvEv39rrH/Gd/yAnct8wC0RsW3tmFOgjgQxuBvypIxuUynTw==
+  dependencies:
+    "@ethersproject/logger" "^5.0.5"
+
 "@ethersproject/networks@5.0.6", "@ethersproject/networks@^5.0.3":
   version "5.0.6"
   resolved "https://registry.yarnpkg.com/@ethersproject/networks/-/networks-5.0.6.tgz#4d6586bbebfde1c027504ebf6dfb783b29c3803a"
@@ -387,6 +562,14 @@
   dependencies:
     "@ethersproject/logger" "^5.0.8"
 
+"@ethersproject/pbkdf2@5.0.4":
+  version "5.0.4"
+  resolved "https://registry.yarnpkg.com/@ethersproject/pbkdf2/-/pbkdf2-5.0.4.tgz#a0841d53f5ce9a2b52a65a349d2dc15910b0a767"
+  integrity sha512-9jVBjHXQKfr9+3bkCg01a8Cd1H9e+7Kw3ZMIvAxD0lZtuzrXsJxm1hVwY9KA+PRUvgS/9tTP4viXQYwLAax7zg==
+  dependencies:
+    "@ethersproject/bytes" "^5.0.4"
+    "@ethersproject/sha2" "^5.0.3"
+
 "@ethersproject/pbkdf2@5.0.6", "@ethersproject/pbkdf2@^5.0.3":
   version "5.0.6"
   resolved "https://registry.yarnpkg.com/@ethersproject/pbkdf2/-/pbkdf2-5.0.6.tgz#105dbfb08cd5fcf33869b42bfdc35a3ebd978cbd"
@@ -395,6 +578,13 @@
     "@ethersproject/bytes" "^5.0.4"
     "@ethersproject/sha2" "^5.0.3"
 
+"@ethersproject/properties@5.0.4":
+  version "5.0.4"
+  resolved "https://registry.yarnpkg.com/@ethersproject/properties/-/properties-5.0.4.tgz#a67a1f5a52c30850b5062c861631e73d131f666e"
+  integrity sha512-UdyX3GqBxFt15B0uSESdDNmhvEbK3ACdDXl2soshoPcneXuTswHDeA0LoPlnaZzhbgk4p6jqb4GMms5C26Qu6A==
+  dependencies:
+    "@ethersproject/logger" "^5.0.5"
+
 "@ethersproject/properties@5.0.6", "@ethersproject/properties@>=5.0.0-beta.131", "@ethersproject/properties@^5.0.3", "@ethersproject/properties@^5.0.4":
   version "5.0.6"
   resolved "https://registry.yarnpkg.com/@ethersproject/properties/-/properties-5.0.6.tgz#44d82aaa294816fd63333e7def42426cf0e87b3b"
@@ -409,6 +599,31 @@
   dependencies:
     "@ethersproject/logger" "^5.0.8"
 
+"@ethersproject/providers@5.0.13":
+  version "5.0.13"
+  resolved "https://registry.yarnpkg.com/@ethersproject/providers/-/providers-5.0.13.tgz#1ec39e544353e1090803955ba6a1920ee942d6ab"
+  integrity sha512-5jsuk1FwXxmoQApGs8LSQyS43KP01pHA+6cQ1OPov5pT5Pcqe6ffh6UD1//BZ9Vjf+5e9AQqIk8w7FkGyROuCA==
+  dependencies:
+    "@ethersproject/abstract-provider" "^5.0.4"
+    "@ethersproject/abstract-signer" "^5.0.4"
+    "@ethersproject/address" "^5.0.4"
+    "@ethersproject/basex" "^5.0.3"
+    "@ethersproject/bignumber" "^5.0.7"
+    "@ethersproject/bytes" "^5.0.4"
+    "@ethersproject/constants" "^5.0.4"
+    "@ethersproject/hash" "^5.0.4"
+    "@ethersproject/logger" "^5.0.5"
+    "@ethersproject/networks" "^5.0.3"
+    "@ethersproject/properties" "^5.0.3"
+    "@ethersproject/random" "^5.0.3"
+    "@ethersproject/rlp" "^5.0.3"
+    "@ethersproject/sha2" "^5.0.3"
+    "@ethersproject/strings" "^5.0.4"
+    "@ethersproject/transactions" "^5.0.5"
+    "@ethersproject/web" "^5.0.6"
+    bech32 "1.1.4"
+    ws "7.2.3"
+
 "@ethersproject/providers@5.0.17":
   version "5.0.17"
   resolved "https://registry.yarnpkg.com/@ethersproject/providers/-/providers-5.0.17.tgz#f380e7831149e24e7a1c6c9b5fb1d6dfc729d024"
@@ -434,6 +649,14 @@
     bech32 "1.1.4"
     ws "7.2.3"
 
+"@ethersproject/random@5.0.4":
+  version "5.0.4"
+  resolved "https://registry.yarnpkg.com/@ethersproject/random/-/random-5.0.4.tgz#98f7cf65b0e588cec39ef24843e391ed5004556f"
+  integrity sha512-AIZJhqs6Ba4/+U3lOjt3QZbP6b/kuuGLJUYFUonAgWmkTHwqsCwYnFvnHKQSUuHbXHvErp7WFXFlztx+yMn3kQ==
+  dependencies:
+    "@ethersproject/bytes" "^5.0.4"
+    "@ethersproject/logger" "^5.0.5"
+
 "@ethersproject/random@5.0.6", "@ethersproject/random@^5.0.3":
   version "5.0.6"
   resolved "https://registry.yarnpkg.com/@ethersproject/random/-/random-5.0.6.tgz#9be80a1065f2b8e6f321dccb3ebeb4886cac9ea4"
@@ -442,6 +665,14 @@
     "@ethersproject/bytes" "^5.0.4"
     "@ethersproject/logger" "^5.0.5"
 
+"@ethersproject/rlp@5.0.4":
+  version "5.0.4"
+  resolved "https://registry.yarnpkg.com/@ethersproject/rlp/-/rlp-5.0.4.tgz#0090a0271e84ea803016a112a79f5cfd80271a77"
+  integrity sha512-5qrrZad7VTjofxSsm7Zg/7Dr4ZOln4S2CqiDdOuTv6MBKnXj0CiBojXyuDy52M8O3wxH0CyE924hXWTDV1PQWQ==
+  dependencies:
+    "@ethersproject/bytes" "^5.0.4"
+    "@ethersproject/logger" "^5.0.5"
+
 "@ethersproject/rlp@5.0.6", "@ethersproject/rlp@^5.0.3":
   version "5.0.6"
   resolved "https://registry.yarnpkg.com/@ethersproject/rlp/-/rlp-5.0.6.tgz#29f9097348a3c330811997433b7df89ab51cd644"
@@ -458,6 +689,15 @@
     "@ethersproject/bytes" "^5.0.9"
     "@ethersproject/logger" "^5.0.8"
 
+"@ethersproject/sha2@5.0.4":
+  version "5.0.4"
+  resolved "https://registry.yarnpkg.com/@ethersproject/sha2/-/sha2-5.0.4.tgz#40f639721a27dbe034b3dee021ba20b054586fec"
+  integrity sha512-0yFhf1mspxAfWdXXoPtK94adUeu1R7/FzAa+DfEiZTc76sz/vHXf0LSIazoR3znYKFny6haBxME+usbvvEcF3A==
+  dependencies:
+    "@ethersproject/bytes" "^5.0.4"
+    "@ethersproject/logger" "^5.0.5"
+    hash.js "1.1.3"
+
 "@ethersproject/sha2@5.0.6", "@ethersproject/sha2@^5.0.3":
   version "5.0.6"
   resolved "https://registry.yarnpkg.com/@ethersproject/sha2/-/sha2-5.0.6.tgz#175116dc10b866a0a381f6316d094bcc510bee3c"
@@ -467,6 +707,16 @@
     "@ethersproject/logger" "^5.0.5"
     hash.js "1.1.3"
 
+"@ethersproject/signing-key@5.0.5":
+  version "5.0.5"
+  resolved "https://registry.yarnpkg.com/@ethersproject/signing-key/-/signing-key-5.0.5.tgz#acfd06fc05a14180df7e027688bbd23fc4baf782"
+  integrity sha512-Z1wY7JC1HVO4CvQWY2TyTTuAr8xK3bJijZw1a9G92JEmKdv1j255R/0YLBBcFTl2J65LUjtXynNJ2GbArPGi5g==
+  dependencies:
+    "@ethersproject/bytes" "^5.0.4"
+    "@ethersproject/logger" "^5.0.5"
+    "@ethersproject/properties" "^5.0.3"
+    elliptic "6.5.3"
+
 "@ethersproject/signing-key@5.0.7", "@ethersproject/signing-key@^5.0.4":
   version "5.0.7"
   resolved "https://registry.yarnpkg.com/@ethersproject/signing-key/-/signing-key-5.0.7.tgz#d03bfc5f565efb962bafebf8e6965e70d1c46d31"
@@ -487,6 +737,17 @@
     "@ethersproject/properties" "^5.0.7"
     elliptic "6.5.3"
 
+"@ethersproject/solidity@5.0.5":
+  version "5.0.5"
+  resolved "https://registry.yarnpkg.com/@ethersproject/solidity/-/solidity-5.0.5.tgz#97a7d8a67f2d944f208c948fed0d565512bcc2be"
+  integrity sha512-DMFQ0ouXmNVoKWbGEUFGi8Urli4SJip9jXafQyFHWPRr5oJUqDVkNfwcyC37k+mhBG93k7qrYXCH2xJnGEOxHg==
+  dependencies:
+    "@ethersproject/bignumber" "^5.0.7"
+    "@ethersproject/bytes" "^5.0.4"
+    "@ethersproject/keccak256" "^5.0.3"
+    "@ethersproject/sha2" "^5.0.3"
+    "@ethersproject/strings" "^5.0.4"
+
 "@ethersproject/solidity@5.0.7":
   version "5.0.7"
   resolved "https://registry.yarnpkg.com/@ethersproject/solidity/-/solidity-5.0.7.tgz#72a3455f47a454db2dcf363992d42e9045dc7fce"
@@ -498,6 +759,15 @@
     "@ethersproject/sha2" "^5.0.3"
     "@ethersproject/strings" "^5.0.4"
 
+"@ethersproject/strings@5.0.5":
+  version "5.0.5"
+  resolved "https://registry.yarnpkg.com/@ethersproject/strings/-/strings-5.0.5.tgz#ed7e99a282a02f40757691b04a24cd83f3752195"
+  integrity sha512-JED6WaIV00xM/gvj8vSnd+0VWtDYdidTmavFRCTQakqfz+4tDo6Jz5LHgG+dd45h7ah7ykCHW0C7ZXWEDROCXQ==
+  dependencies:
+    "@ethersproject/bytes" "^5.0.4"
+    "@ethersproject/constants" "^5.0.4"
+    "@ethersproject/logger" "^5.0.5"
+
 "@ethersproject/strings@5.0.7", "@ethersproject/strings@>=5.0.0-beta.130", "@ethersproject/strings@^5.0.4":
   version "5.0.7"
   resolved "https://registry.yarnpkg.com/@ethersproject/strings/-/strings-5.0.7.tgz#8dc68f794c9e2901f3b75e53b2afbcb6b6c15037"
@@ -516,6 +786,21 @@
     "@ethersproject/constants" "^5.0.8"
     "@ethersproject/logger" "^5.0.8"
 
+"@ethersproject/transactions@5.0.6":
+  version "5.0.6"
+  resolved "https://registry.yarnpkg.com/@ethersproject/transactions/-/transactions-5.0.6.tgz#b8b27938be6e9ed671dbdd35fe98af8b14d0df7c"
+  integrity sha512-htsFhOD+NMBxx676A8ehSuwVV49iqpSB+CkjPZ02tpNew0K6p8g0CZ46Z1ZP946gIHAU80xQ0NACHYrjIUaCFA==
+  dependencies:
+    "@ethersproject/address" "^5.0.4"
+    "@ethersproject/bignumber" "^5.0.7"
+    "@ethersproject/bytes" "^5.0.4"
+    "@ethersproject/constants" "^5.0.4"
+    "@ethersproject/keccak256" "^5.0.3"
+    "@ethersproject/logger" "^5.0.5"
+    "@ethersproject/properties" "^5.0.3"
+    "@ethersproject/rlp" "^5.0.3"
+    "@ethersproject/signing-key" "^5.0.4"
+
 "@ethersproject/transactions@5.0.8", "@ethersproject/transactions@^5.0.0-beta.135", "@ethersproject/transactions@^5.0.5":
   version "5.0.8"
   resolved "https://registry.yarnpkg.com/@ethersproject/transactions/-/transactions-5.0.8.tgz#3b4d7041e13b957a9c4f131e0aea9dae7b6f5a23"
@@ -546,6 +831,15 @@
     "@ethersproject/rlp" "^5.0.7"
     "@ethersproject/signing-key" "^5.0.8"
 
+"@ethersproject/units@5.0.6":
+  version "5.0.6"
+  resolved "https://registry.yarnpkg.com/@ethersproject/units/-/units-5.0.6.tgz#e1169ecffb7e8d5eab84e1481a4e35df19045708"
+  integrity sha512-tsJuy4mipppdmooukRfhXt8fGx9nxvfvG6Xdy0RDm7LzHsjghjwQ69m2bCpId6SDSR1Uq1cQ9irPiUBSyWolUA==
+  dependencies:
+    "@ethersproject/bignumber" "^5.0.7"
+    "@ethersproject/constants" "^5.0.4"
+    "@ethersproject/logger" "^5.0.5"
+
 "@ethersproject/units@5.0.8":
   version "5.0.8"
   resolved "https://registry.yarnpkg.com/@ethersproject/units/-/units-5.0.8.tgz#563325b20fe1eceff7b61857711d5e2b3f38fd09"
@@ -555,6 +849,27 @@
     "@ethersproject/constants" "^5.0.4"
     "@ethersproject/logger" "^5.0.5"
 
+"@ethersproject/wallet@5.0.6":
+  version "5.0.6"
+  resolved "https://registry.yarnpkg.com/@ethersproject/wallet/-/wallet-5.0.6.tgz#8a3f7556a614b54c24f729b2dac893a66b931ac9"
+  integrity sha512-dRqx3+Degc5pvjaeeTHuk2EuTRM3b6ce/TiV0HRZhRXYnKyyjg0iYXEZo/b6p3rnV+Xhwxkc0+I/ISPkNpictA==
+  dependencies:
+    "@ethersproject/abstract-provider" "^5.0.4"
+    "@ethersproject/abstract-signer" "^5.0.4"
+    "@ethersproject/address" "^5.0.4"
+    "@ethersproject/bignumber" "^5.0.7"
+    "@ethersproject/bytes" "^5.0.4"
+    "@ethersproject/hash" "^5.0.4"
+    "@ethersproject/hdnode" "^5.0.4"
+    "@ethersproject/json-wallets" "^5.0.6"
+    "@ethersproject/keccak256" "^5.0.3"
+    "@ethersproject/logger" "^5.0.5"
+    "@ethersproject/properties" "^5.0.3"
+    "@ethersproject/random" "^5.0.3"
+    "@ethersproject/signing-key" "^5.0.4"
+    "@ethersproject/transactions" "^5.0.5"
+    "@ethersproject/wordlists" "^5.0.4"
+
 "@ethersproject/wallet@5.0.9":
   version "5.0.9"
   resolved "https://registry.yarnpkg.com/@ethersproject/wallet/-/wallet-5.0.9.tgz#976c7d950489c40308d676869d24e59ab7b82ad1"
@@ -587,6 +902,17 @@
     "@ethersproject/properties" "^5.0.3"
     "@ethersproject/strings" "^5.0.4"
 
+"@ethersproject/web@5.0.9":
+  version "5.0.9"
+  resolved "https://registry.yarnpkg.com/@ethersproject/web/-/web-5.0.9.tgz#b08f8295f4bfd4777c8723fe9572f5453b9f03cb"
+  integrity sha512-//QNlv1MSkOII1hv3+HQwWoiVFS+BMVGI0KYeUww4cyrEktnx1QIez5bTSab9s9fWTFaWKNmQNBwMbxAqPuYDw==
+  dependencies:
+    "@ethersproject/base64" "^5.0.3"
+    "@ethersproject/bytes" "^5.0.4"
+    "@ethersproject/logger" "^5.0.5"
+    "@ethersproject/properties" "^5.0.3"
+    "@ethersproject/strings" "^5.0.4"
+
 "@ethersproject/web@^5.0.12":
   version "5.0.12"
   resolved "https://registry.yarnpkg.com/@ethersproject/web/-/web-5.0.12.tgz#f123397c107f863c31fce5f31a97c66ec155e755"
@@ -598,6 +924,17 @@
     "@ethersproject/properties" "^5.0.7"
     "@ethersproject/strings" "^5.0.8"
 
+"@ethersproject/wordlists@5.0.5":
+  version "5.0.5"
+  resolved "https://registry.yarnpkg.com/@ethersproject/wordlists/-/wordlists-5.0.5.tgz#a935b7fdb86c96b44ea8391fed94b3fa2f33c606"
+  integrity sha512-XA3ycFltVrCTQt04w5nHu3Xq5Z6HjqWsXaAYQHFdqtugyUsIumaO9S5MOwFFuUYTNkZUoT3jCRa/OBS+K4tLfA==
+  dependencies:
+    "@ethersproject/bytes" "^5.0.4"
+    "@ethersproject/hash" "^5.0.4"
+    "@ethersproject/logger" "^5.0.5"
+    "@ethersproject/properties" "^5.0.3"
+    "@ethersproject/strings" "^5.0.4"
+
 "@ethersproject/wordlists@5.0.7", "@ethersproject/wordlists@^5.0.4":
   version "5.0.7"
   resolved "https://registry.yarnpkg.com/@ethersproject/wordlists/-/wordlists-5.0.7.tgz#4e5ad38cfbef746b196a3290c0d41696eb7ab468"
@@ -3601,7 +3938,7 @@ ethereumjs-util@^5.0.0, ethereumjs-util@^5.0.1, ethereumjs-util@^5.1.1, ethereum
     rlp "^2.0.0"
     safe-buffer "^5.1.1"
 
-ethereumjs-util@^7.0.2, ethereumjs-util@^7.0.3:
+ethereumjs-util@^7.0.2, ethereumjs-util@^7.0.3, ethereumjs-util@^7.0.7:
   version "7.0.7"
   resolved "https://registry.yarnpkg.com/ethereumjs-util/-/ethereumjs-util-7.0.7.tgz#484fb9c03b766b2ee64821281070616562fb5a59"
   integrity sha512-vU5rtZBlZsgkTw3o6PDKyB8li2EgLavnAbsKcfsH2YhHH1Le+PP8vEiMnAnvgc1B6uMoaM5GDCrVztBw0Q5K9g==
@@ -3666,6 +4003,42 @@ ethereumjs-wallet@0.6.5:
     utf8 "^3.0.0"
     uuid "^3.3.2"
 
+ethers@5.0.18:
+  version "5.0.18"
+  resolved "https://registry.yarnpkg.com/ethers/-/ethers-5.0.18.tgz#2ccf382d32b9712e6967d0b14303cb0fe8056c7a"
+  integrity sha512-WCiKGfAt09hBS1HZspu+JTgeunFcUCVRhCXO8X+VadBJGTRlG722XXib79Vz2oyBperz90CcjkBPdNly61Ah4A==
+  dependencies:
+    "@ethersproject/abi" "5.0.7"
+    "@ethersproject/abstract-provider" "5.0.5"
+    "@ethersproject/abstract-signer" "5.0.7"
+    "@ethersproject/address" "5.0.5"
+    "@ethersproject/base64" "5.0.4"
+    "@ethersproject/basex" "5.0.4"
+    "@ethersproject/bignumber" "5.0.8"
+    "@ethersproject/bytes" "5.0.5"
+    "@ethersproject/constants" "5.0.5"
+    "@ethersproject/contracts" "5.0.5"
+    "@ethersproject/hash" "5.0.6"
+    "@ethersproject/hdnode" "5.0.5"
+    "@ethersproject/json-wallets" "5.0.7"
+    "@ethersproject/keccak256" "5.0.4"
+    "@ethersproject/logger" "5.0.6"
+    "@ethersproject/networks" "5.0.4"
+    "@ethersproject/pbkdf2" "5.0.4"
+    "@ethersproject/properties" "5.0.4"
+    "@ethersproject/providers" "5.0.13"
+    "@ethersproject/random" "5.0.4"
+    "@ethersproject/rlp" "5.0.4"
+    "@ethersproject/sha2" "5.0.4"
+    "@ethersproject/signing-key" "5.0.5"
+    "@ethersproject/solidity" "5.0.5"
+    "@ethersproject/strings" "5.0.5"
+    "@ethersproject/transactions" "5.0.6"
+    "@ethersproject/units" "5.0.6"
+    "@ethersproject/wallet" "5.0.6"
+    "@ethersproject/web" "5.0.9"
+    "@ethersproject/wordlists" "5.0.5"
+
 ethers@^4.0.32, ethers@^4.0.40:
   version "4.0.48"
   resolved "https://registry.yarnpkg.com/ethers/-/ethers-4.0.48.tgz#330c65b8133e112b0613156e57e92d9009d8fbbe"
@@ -3681,7 +4054,7 @@ ethers@^4.0.32, ethers@^4.0.40:
     uuid "2.0.1"
     xmlhttprequest "1.8.0"
 
-ethers@^5.0.0, ethers@^5.0.1, ethers@^5.0.24:
+ethers@^5.0.0, ethers@^5.0.1:
   version "5.0.24"
   resolved "https://registry.yarnpkg.com/ethers/-/ethers-5.0.24.tgz#fbb8e4d35070d134f2eb846c07500b8c0eaef6d3"
   integrity sha512-77CEtVC88fJGEhxGXRvQqAEH6e2A+ZFiv2FBT6ikXndlty5sw6vMatAhg1v+w3CaaGZOf1CP81jl4Mc8Zrj08A==