How to use the @aeternity/aepp-sdk.Crypto function in @aeternity/aepp-sdk

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require = require('esm')(module /*, options */) // use to handle es6 import/export

const AeSDK = require('@aeternity/aepp-sdk');
const Crypto = AeSDK.Crypto;
const toBytes = require('@aeternity/aepp-sdk/es/utils/bytes').toBytes;

function keyToHex (publicKey) {
    let byteArray = Crypto.decodeBase58Check(publicKey.split('_')[1]);
    let asHex = '#' + byteArray.toString('hex');
    return asHex;
}

const isKeyPair = (k) => {
    if (k == null) {
        return false
    }
    if (typeof k != 'object') {
        return false
    }

const fs = require('fs');
const defaultDeploymentFilePath = `deployment/deploy.js`;
const AeSDK = require('@aeternity/aepp-sdk');
const Crypto = AeSDK.Crypto;
const path = require('path');

const verifyDeploymentFile = (deploymentFile) => {
	if (!fs.existsSync(deploymentFile)) {
		throw new Error(`${deploymentFile} file not found. Probably you've not initialized aeproject. Please run aeproject init first.`)
	}
};

const getDeployMethod = (deploymentFilePath) => {
	const _deploymentFilePath = (deploymentFilePath) ? deploymentFilePath : defaultDeploymentFilePath;
	verifyDeploymentFile(_deploymentFilePath);

	const deploymentFile = path.resolve(process.cwd(),_deploymentFilePath);
	const deployModule = require(deploymentFile);

	return deployModule.deploy;