How to use the eth-crypto.createIdentity function in eth-crypto

constructor() {
    this.wallet = EthCrypto.createIdentity();
    // initialize the nonce
    this.nonce = 0;
  }

constructor (wallet, genesis, network) {
    // Blockchain identity
    this.wallet = wallet
    // P2P Node identity -- used for connecting to peers
    this.p2pNodeId = EthCrypto.createIdentity()
    this.pid = this.p2pNodeId.address
    this.network = network
    this.state = genesis
    this.transactions = []
    this.invalidNonceTxs = {}
    this.nonce = 0
  }

async function createAuthIdentity() {
  const ephemeral = createIdentity()

  const ephemeralLifespanMinutes = 7 * 24 * 60 // 1 week

  let address
  let signer
  let hasConnectedWeb3 = false

  if (ENABLE_WEB3) {
    const result = await providerFuture
    if (result.successful) {
      const eth = Eth.fromCurrentProvider()!
      const account = (await eth.getAccounts())[0]

      address = account.toJSON()
      signer = async (message: string) => {
        let result

constructor() {
    this.wallet = EthCrypto.createIdentity();
    // initialize the nonce
		// TODO
  }

/* Signed transaction format
tx = {
  contents: {
    type: string,  // either 'mint' or 'send'
    amount: int,   // some quantity of coins
    from: string,  // the address of the sender
    to: string,    // the address of the recipient
  },
  sig: string      // the signature of the sender
}
*/

var accounts = {
  'paypal': EthCrypto.createIdentity(),
  'aparna': EthCrypto.createIdentity(),
  'jing': EthCrypto.createIdentity()
}

var unsignedTxs = [
  {
    type: 'mint',
    amount: 100,
    from: accounts.paypal.address,
    to: accounts.paypal.address,
    nonce: 0
  },
  {
    type: 'send',
    amount: 65,
    from: accounts.paypal.address,
    to: accounts.aparna.address,
    nonce: 1

constructor (wallet, genesis, network) {
    // Blockchain identity
    this.wallet = wallet
    // P2P Node identity -- used for connecting to peers
    this.p2pNodeId = EthCrypto.createIdentity()
    this.pid = this.p2pNodeId.address
    this.network = network
    this.state = genesis
    this.transactions = []
    this.blockchain = []    //longest chain
    this.allBlocks = []    //all blocks
    this.invalidNonceTxs = {}
    this.blockNumber = 0 //keep track of blocks added to blockchain despite getState()

    const genesisBlock = {
      nonce: 0,
      number: 0,
      coinbase: 0,
      difficulty: 9000,
      parentHash: 0,
      timestamp: 0,

constructor() {
    this.wallet = EthCrypto.createIdentity();
  }

constructor() {
        this.wallet = EthCrypto.createIdentity()
    }

static generate_identity() {
        return EthCrypto.createIdentity();
    }