投稿時間:2022-07-06 06:23:17 RSSフィード2022-07-06 06:00 分まとめ(28件)

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AWS	AWS Government, Education, and Nonprofits Blog	Get ahead this summer with no-cost cloud training from AWS Educate	https://aws.amazon.com/blogs/publicsector/get-ahead-summer-no-cost-cloud-training-aws-educate/	Get ahead this summer with no cost cloud training from AWS EducateAre you one of the many students that spent all year dreaming of summer vacation Summer is here but if you re a motivated go getter you may find yourself ready for a challenge or to learn something new AWS Educate helps you build your cloud skills at your own pace on your own timeーno matter where you are on your journey in learning about the cloud	2022-07-05 20:04:25
AWS	AWS	AWS | Curiosity Kid — Imagine | Amazon Web Services	https://www.youtube.com/watch?v=SekxcIRoV2Y	AWS Curiosity Kid ーImagine Amazon Web ServicesWith AWS the possibilities are endless From reimagining the fan experience to customizing lunch orders in a snap AWS helps companies power their business Learn how AWS is driving innovation and inspiring the next generation of builders For Taco Bell PGA Tour Nasdaq and Ferrari AWS is how you build new ideas and reinvent the everyday Learn more about AWS is how at Subscribe More AWS videos More AWS events videos ABOUT AWSAmazon Web Services AWS is the world s most comprehensive and broadly adopted cloud platform offering over fully featured services from data centers globally Millions of customers ーincluding the fastest growing startups largest enterprises and leading government agencies ーare using AWS to lower costs become more agile and innovate faster AWSishow AWS AmazonWebServices CloudComputing	2022-07-05 20:10:59
Docker	dockerタグが付けられた新着投稿 - Qiita	【Docker初心者】別環境のmysqlコンテナに接続するphpMyAdminコンテナ作成	https://qiita.com/mizu0715/items/3cf63ac3b4a2339e393e	dockercom	2022-07-06 05:49:55
golang	Goタグが付けられた新着投稿 - Qiita	動かして覚える！Goでデータベースの基本的な接続方法とCURD操作	https://qiita.com/Rqixy/items/bcac0f84a537ecbc1ab4	説明	2022-07-06 05:21:56
海外TECH	MakeUseOf	How to Annotate Screenshots in Linux With Pensela	https://www.makeuseof.com/annotate-screenshots-on-linux-using-pensela/	pensela	2022-07-05 20:30:14
海外TECH	MakeUseOf	10 Tips and Tricks for New Roku Users	https://www.makeuseof.com/tips-for-new-roku-users/	tricks	2022-07-05 20:15:13
海外TECH	DEV Community	Mangling in Python	https://dev.to/ayushbisht2001/mangling-in-python-3b0h	Mangling in PythonLet s understand this concept with the given example class Parent def init self self name ayush self age def get name self return self name def get age self return self age obj Parent print obj get name print obj get age print obj age The above code seems to be syntactically correct but on executing the following error will occur AttributeError Parent object has no attribute get age So why the above code is giving AttributeError The answer is simple this is because of name mangling in python The answer to this problem is in the problem itself Since AttributeError is Raised when an attribute reference or assignment fails Let s explore the problem a little bit more by analyzing the list of names in the Parent class scope for that we can use dir print dir obj Parent age Parent get age class delattr dict dir doc eq format ge getattribute gt hash init init subclass le lt module ne new reduce reduce ex repr setattr sizeof str subclasshook weakref get name name Here we have two attributes Parentage Parent get age whose name are implicitly merged with the class name in other words we can say the attribute name is mangled with the class name Since there is no references for the age and get age identifiers in the Parent class scope hence causes AttributeError What is Mangling Name Mangling is nothing but the mechanism by which any identifiers with leading underscores like age are textually replaced with classname age Till now we have considered this mechanism as a problem which restricts the naming of identifiers However in the actual scenario it is helpful in some situation Let s discuss some cases where the name mangling is used Sometimes mangling can be considered a way to implement private members in python In the above example we have seen that AttributeError is raised when we are trying to access the mangled variables outside the class however inside the class the variables are referenced with the same name But there is a catch we can access these private member by referencing the attributes with the mangled name print obj Parent age So no perfect privacy in python Overriding Overriding is the ability of OOPs that allows the subclass to override the method of a parent class The method in the subclass is of the same name and signature as the super class method class Parent def init self self name ayush self age def get name self return self name def get age self return f Parent class self age get age get age private copy of original get age method class Child Parent def init self self name abc self age def get name self return self name def get age self return f Child class self age child Child print child get age Child class print child Parent get age Parent class As it is clear from the above example Name mangling is helpful for letting subclasses override methods without breaking intraclass method calls ConclusionThe conclusion from the above discussion is that implicit conversion of a variable like var name into a class mangled name is the inbuilt feature of python Mangled variables can be used in various situations as discussed above	2022-07-05 20:40:27
海外TECH	DEV Community	Geolocation Tutorial - Get User Location using Vanilla JS	https://dev.to/thedevdrawer/geolocation-tutorial-get-user-location-using-vanilla-js-46a	Geolocation Tutorial Get User Location using Vanilla JSIf you often use maps on your website you may be interested in getting the geolocation of your user s location In this tutorial we go over how to find the latitude and longitude of your user after asking permission Once we have those coordinates we use an open source map to plot their exact location within a visual interface NOTE This tutorial uses Leaflet OpenStreetMap but you can use the same methods to integrate Google maps View This On YouTubeThis simple tutorial will only use files Your main index html and your init js Creating Our Frontend lt DOCTYPE html gt lt html lang en gt lt head gt lt meta charset utf gt lt title gt Geolocation Request Tutorial lt title gt lt link rel stylesheet href dist leaflet css gt lt script src dist leaflet js gt lt script gt lt style gt map height vh display none result font size rem font weight bold text align center margin bottom rem display none lt style gt lt head gt lt body gt lt button type button id showPosition gt Show Position lt button gt lt div id result gt lt div gt lt div id map gt lt div gt lt body gt lt script src js init js gt lt script gt lt html gt Getting Location Permissionclass Geolocation on success successCallback position let result document querySelector result get the result div result style display block show the result div result innerText Lat position coords latitude Long position coords longitude display the latitude and longitude on error errorCallback error let result document querySelector result get the result div result style display block show the result div if error code if the user denied the request result innerText You have not given permission to access your location else if error code if the position is unavailable result innerText Your location is unavailable else if error code if the request times out result innerText The request to get your location timed out else if something else went wrong result innerText An unknown error occurred showPosition if navigator geolocation if the browser supports geolocation navigator geolocation getCurrentPosition this successCallback this errorCallback get the user s location let result document querySelector result result style display block result innerText Getting the position information else alert Your browser does not support geolocation if the browser doesn t support geolocation const showPosition document querySelector showPosition showPosition addEventListener click function e e preventDefault let result document querySelector result result style display block new Geolocation showPosition show the user s location Once you run the code above your browser should ask you for permission to use your location If you accept it will display your latitude and longitude in the result div If you decline it will show your error message in the same div Adding A MapIn the HTML code we added in the first section you may have noticed a reference to Leaflet This is what we are using for the map in this tutorial since it is open source and free however you can simply use Google maps the same way once you get your latitude and longitude In your init js file add the following in your successCallback function let mapContainer document querySelector map get the map containermapContainer style display block show the map containerconst map L map map setView position coords latitude position coords longitude create a map and set the view to the user s locationconst tiles L tileLayer https s tile openstreetmap org z x y png maxZoom attribution amp copy lt a href gt OpenStreetMap lt a gt addTo map add the tiles to the mapconst marker L marker position coords latitude position coords longitude addTo map add a marker to the mapPlace it directly after your last result innerText code Once you run the combined code you should see a map with a marker with the exact location you are supplying ConclusionIt is a simple script and can be used for other things or other scripts not just a point on a map Once you have access to your user s location you can use it to direct them to specific pages or display specific content so go wild and have fun with your new geolocation script	2022-07-05 20:29:13
海外TECH	DEV Community	Accepting Crypto Payments in a Classic Commerce App	https://dev.to/mbogan/accepting-crypto-payments-in-a-classic-commerce-app-38p7	Accepting Crypto Payments in a Classic Commerce AppE commerce storefronts have been slow to offer crypto payment methods to their customers Crypto payment plug ins or payment gateway integrations aren t generally available or they rely on third party custodians to collect exchange and distribute money Considering the growing ownership rate and experimentation ratio of cryptocurrencies a pay with crypto button could greatly drive sales This article demonstrates how you can integrate a custom secure crypto payment method into any online store without relying on a third party service Coding and maintaining smart contracts needs quite some heavy lifting under the hood a job that we re handing over to Truffle suite a commonly used toolchain for blockchain builders To provide access to blockchain nodes during development and for the application backend we rely on Infura nodes that offer access to the Ethereum network at a generous free tier Using these tools together will make the development process much easier Scenario The Amethon BookstoreThe goal is to build a storefront for downloadable eBooks that accepts the Ethereum blockchain s native currency Ether and ERC stablecoins payment tokens pegged in USD as a payment method Let s refer to it as Amethon from here on A full implementation can be found on the accompanying github monorepo All code is written in Typescript and can be compiled using the package syarn build oryarn devcommands We ll walk you through the process step by step but familiarity with smart contracts Ethereum and minimal knowledge of the Solidity programming language might be helpful to read along We recommend you to read some fundamentals first to become familiar with the ecosystem s basic concepts Gif file Application StructureThe store backend is built as a CRUD API that is not connected to any blockchain itself Its frontend triggers payment requests on that API which customers fulfill using their crypto wallets Amethon is designed as a traditional ecommerce application that takes care of the business logic and doesn t rely on any on chain data besides the payment itself During checkout the backend issues PaymentRequest objects that carry a unique identifier such as an invoice number that users attach to their payment transactions A background daemon listens to the respective contract events and updates the store s database when it detects a payment Payment settlements on Amethon The PaymentReceiver ContractAt the center of Amethon thePaymentReceiversmart contract accepts and escrows payments on behalf of the storefront owner Each time a user sends funds to thePaymentReceiver contract aPaymentReceivedevent is emitted containing information about the payment s origin the customer s Ethereum account its total value the ERC token contract address utilized and thepaymentIdthat refers to the backend s database entry event PaymentReceived address indexed buyer uint value address token bytes paymentId Ethereum contracts act similarly to user based aka externally owned EOA accounts and get their own account address upon deployment Receiving the native Ether currency requires implementing thereceiveandfallback functions which are invoked when someone transfers Ether funds to the contract and no other function signature matches the call receive external payable emit PaymentReceived msg sender msg value ETH ADDRESS bytes fallback external payable emit PaymentReceived msg sender msg value ETH ADDRESS bytes msg data The official Solidity docs point out the subtle difference between these functions receiveis invoked when the incoming transaction doesn t contain additional data otherwise fallback is called The native currency of Ethereum itself is not an ERC token and has no utility besides being a counting unit However it has an identifiable address xEeeeeEeeeEeEeeEeEeEeeEEEeeeeEeeeeeeeEEeE that we use to signal an Ether payment in ourPaymentReceivedevents Ether transfers however have a major shortcoming the amount of allowed computation upon reception is extremely low The gas sent along by customers merely allows us to emit an event but not to redirect funds to the store owner s original address Therefore the receiver contract keeps all incoming Ethers and allows the store owner to release them to their own account at any time function getBalance public view returns uint return address this balance function release external onlyOwner bool ok owner call value getBalance require ok Failed to release Eth Accepting ERC tokens as a payment is slightly more difficult for historical reasons In the authors of the initial specification couldn t predict the upcoming requirements and kept the ERC standard s interface as simple as possible Most notably ERC contracts aren t guaranteed to notify recipients about transfers so there s no way for ourPaymentReceiver to execute code when ERC tokens are transferred to it The ERC ecosystem has evolved and now includes additional specs For example the EIP standard addresses this very problem Unfortunately you cannot rely on major stablecoin platforms to have implemented it So Amethon must accept ERC token payments in the classic way Instead of dropping tokens on it unwittingly the contract takes care of the transfer on behalf of the customer This requires users to first allow the contract to handle a certain amount of their funds This inconveniently requires users to first transmit anApproval transaction to the ERC token contract before interacting with the real payment method EIP might improve this situation however we have to play by the old rules for the time being function payWithErc IERC erc uint amount uint paymentId external erc transferFrom msg sender owner amount emit PaymentReceived msg sender amount address erc bytes paymentId Compiling Deploying and Variable SafetySeveral toolchains allow developers to compile deploy and interact with Ethereum smart contracts but one of the most advanced ones is the Truffle Suite It comes with a built in development blockchain based on Ganache and a migration concept that allows you to automate and safely run contract deployments Deploying contracts on real blockchain infrastructure such as Ethereum testnets requires two things an Ethereum provider that s connected to a blockchain node and either the private keys wallet mnemonics of an account or a wallet connection that can sign transactions on behalf of an account The account also needs to have some testnet Ethers on it to pay for gas fees during deployment MetaMask does that job Create a new account that you re not using for anything else but deployment it will become the owner of the contract and fund it with some Ethers using your preferred testnet s faucet we recommend Paradigm Usually you would now export that account s private key Account Details gt Export Private Key and wire it up with your development environment but to circumvent all security issues implied by that workflow Truffle comes with a dedicated dashboard network and web application that can be used to sign transactions like contract deployments using Metamask inside a browser To start it up execute truffle dashboard in a fresh terminal window and visit http localhost using a browser with an active Metamask extension Using truffle s dashboard to sign transactions without exposing private keysThe Amethon project also relies on various secret settings Note that due to the way dotenv flowworks envfiles contain samples or publicly visible settings which are overridden by gitignored env localfiles Copy all env files in the packages subdirectories to env locals and override their values To connect your local environment to an Ethereum network access a synced blockchain node While you certainly could download one of the many clients and wait for it to sync on your machine it is far more convenient to connect your applications to Ethereum nodes that are offered as a service the most well known being Infura Their free tier provides you with three different access keys and k RPC requests per month supporting a wide range of Ethereum networks After signup take note of your Infura key and put it in your contracts env localas INFURA KEY If you d like to interact with contracts e g on the Kovan network simply add the respective truffle configuration and an network kovan option to all your truffle commands You can even start an interactive console yarn truffle console network kovan There isn t any special setup process needed to test contracts locally To make our lives simple we re using the providers and signers injected by Metamask through the truffle dashboard provider instead Change to thecontracts folder and runyarn truffle develop This will start a local blockchain with prefunded accounts and open a connected console on it To connect your Metamask wallet to the development network create a new network using http localhost as its RPC endpoint Take note of the accounts listed when the chain starts you can import their private keys into your Metamask wallet to send transactions on their behalf on your local blockchain Typecompileto compile all contracts at once and deploy them to the local chain with migrate You can interact with contracts by requesting their currently deployed instance and call its functions like so pr await PaymentReceiver deployed balance await pr getBalance Once you re satisfied with your results you can then deploy them on a public testnet or mainnet as well yarn truffle migrate interactive network dashboard The Backend The Store API CRUDOur backend provides a JSON API to interact with payment entities on a high level We ve decided to use TypeORM and a local SQLite database to support entities for Books and PaymentRequests Books represent our shop s main entity and have a retail price denoted in USD cents To initially seed the database with books you can use the accompanyingseed ts file After compiling the file you can execute it by invokingnode build seed js backend src entities Book tsimport Entity Column PrimaryColumn OneToMany from typeorm import PaymentRequest from PaymentRequest Entity export class Book PrimaryColumn ISBN string Column title string Column retailUSDCent number OneToMany gt PaymentRequest paymentRequest PaymentRequest gt paymentRequest book payments PaymentRequest Heads up storing monetary values as float values is strongly discouraged on any computer system because operating on float values will certainly introduce precision errors This is also why all crypto tokens operate with decimal digits and Solidity doesn t even have a float data type Ether actually represents wei the smallest Ether unit For users who intend to buy a book from Amethon create an individualPaymentRequestfor their item first by calling the books isbn orderroute This creates a new unique identifier that must be sent along with each request We re using plain integers here however for real world use cases you ll use something more sophisticated The only restriction is the id s binary length that must fit into bytes uint EachPaymentRequest inherits the book s retail value in USD cents and bears the customer s address fulfilledHash and paidUSDCentwill be determined during the buying process backend src entities PaymentRequest ts Entity export class PaymentRequest PrimaryGeneratedColumn id number Column varchar nullable true fulfilledHash string null Column address string Column priceInUSDCent number Column mediumint nullable true paidUSDCent number ManyToOne gt Book book gt book payments book Book An initial order request that creates a PaymentRequestentity looks like this POST http localhost books orderContent Type application json address xceecaAFAFfFFeebEFbcaDebDEE gt paymentRequest book ISBN title Brave New World retailUSDCent address xceecaAFAFfFFeebEFbcaDebDEE priceInUSDCent fulfilledHash null paidUSDCent null id receiver xAbbecBBAcfDfeBE The Blockchain Listener Background ServiceQuerying a blockchain s state tree doesn t cost clients any gas but nodes still need to compute When those operations become too computation heavy they can time out For real time interactions it is highly recommended to not poll chain state but rather listen to events emitted by transactions This requires the use of WebSocket enabled providers so make sure to use the Infura endpoints that start with wss as URL schemefor your backend s PROVIDER RPC environment variable Then you can start the backend s daemon tsscript and listen for PaymentReceivedevents on any chain backend src daemon ts const web new Web process env PROVIDER RPC as string const paymentReceiver new web eth Contract paymentReceiverAbi as AbiItem process env PAYMENT RECEIVER CONTRACT as string const emitter paymentReceiver events PaymentReceived fromBlock emitter on data handlePaymentEvent Take note of how we re instantiating the Contract instance with an Application Binary Interface The Solidity compiler generates the ABI and contains information for RPC clients on how to encode transactions to invoke and decode functions events or parameters on a smart contract Once instantiated you can hook a listener on the contract s PaymentReceived logs starting at block and handle them once received Since Amethon supports Ether and stablecoin USD payments the daemon s handlePaymentEventmethod first checks which token has been used in the user s payment and computes its dollar value if needed backend src daemon tsconst ETH USD CENT const ACCEPTED USD TOKENS process env STABLECOINS as string split const NATIVE ETH xEeeeeEeeeEeEeeEeEeEeeEEEeeeeEeeeeeeeEEeE const handlePaymentEvent async event PaymentReceivedEvent gt const args event returnValues const paymentId web utils hexToNumber args paymentId const decimalValue web utils fromWei args value const payment await paymentRepo findOne where id paymentId let valInUSDCents if args token NATIVE ETH valInUSDCents parseFloat decimalValue ETH USD CENT else if ACCEPTED USD TOKENS includes args token return console error payments of that token are not supported valInUSDCents parseFloat decimalValue if valInUSDCents lt payment priceInUSDCent return console error payment paymentId not sufficient payment paidUSDCent valInUSDCents payment fulfilledHash event transactionHash await paymentRepo save payment The FrontendOur bookstore s frontend is built on the official Create React App template with Typescript support and uses Tailwind for basic styles It supports all known CRA scripts so you can start it locally by yarn start after you created your own env local file containing the payment receiver and stablecoin contract addresses you created before Heads up CRA bumped their webpack dependency to a version that no longer supports node polyfills in browsers This breaks the builds of nearly all Ethereum related projects today A common workaround that avoids ejecting is to hook into the CRA build process We re using react app rewired but you could simply stay at CRA until the community comes up with a better solution Connecting a Web WalletThe crucial part of any Dapp is connecting to a user s wallet You could try to manually wire that process following the official MetaMask docs but we strongly recommend using an appropriate React library We found Noah Zinsmeister s web react to be the best Detecting and connecting a web client boils down to this code ConnectButton tsx frontend src components ConnectButton tsimport useWebReact from web react core import InjectedConnector from web react injected connector import React from react import Web from web export const injectedConnector new InjectedConnector supportedChainIds Kovan Truffle Hardhat export const ConnectButton gt const activate account active useWebReact lt Web gt const connect gt activate injectedConnector console error return active lt div className text sm gt connected as account lt div gt lt button className btn primary onClick connect gt Connect lt button gt By wrapping your App s code in an lt WebReactProvider getLibrary getWebLibrary gt context you can access the web provider account and connected state using theuseWebReacthook from any component Since WebReact is agnostic to the web library being used Web js or ethers js you must provide a callback that yields a connected library frontend src App tsximport Web from web function getWebLibrary provider any return new Web provider Payment FlowsAfter loading the available books from the Amethon backend the lt BookView gt component first checks whether payments for this user have already been processed and then displays all supported payment options bundled inside the lt PaymentOptions gt component Paying With ETHThe lt PayButton gt is responsible for initiating direct Ether transfers to the PaymentReceivercontract Since these calls are not interacting with the contract s interface directly we don t even need to initialize a contract instance frontend src components PayButton tsxconst weiPrice usdInEth paymentRequest priceInUSDCent const tx web eth sendTransaction from account the current user to paymentRequest receiver options address the PaymentReceiver contract address value weiPrice the eth price in wei data paymentRequest idUint the paymentRequest s id converted to a uint hex string const receipt await tx onConfirmed receipt As explained earlier since the new transaction carries a msg data field Solidity s convention triggers the PaymentReceiver s fallback external payable function that emits a PaymentReceivedevent with Ether s token address This is picked up by the daemonized chain listener that updates the backend s database state accordingly A static helper function is responsible for converting the current dollar price to an Ether value In a real world scenario query the exchange rates from a trustworthy third party like Coingecko or from a DEX like Uniswap Doing so allows you to extend Amethon to accept arbitrary tokens as payments frontend src modules index tsconst ETH USD CENT export const usdInEth usdCent number gt const eth usdCent ETH USD CENT toString const wei Web utils toWei eth ether return wei Paying With ERC StablecoinsFor reasons mentioned earlier payments in ERC tokens are slightly more complex from a user s perspective since one cannot simply drop tokens on a contract Like nearly anyone with a comparable use case we must first ask the user to give their permission for our PaymentReceivercontract to transfer their funds and call the actual payWithEerc method that transfers the requested funds on behalf of the user Here s the PayWithStableButton s code for giving the permission on a selected ERC token frontend src components PayWithStableButton tsxconst contract new web eth Contract IERCABI as AbiItem process env REACT APP STABLECOINS const appr await coin methods approve paymentRequest receiver options address receiver contract s address price USD value in wei precision wei send from account Note that the ABI needed to set up a Contract instance of the ERC token receives a general IERC ABI We re using the generated ABI from OpenZeppelin s official library but any other generated ABI would do the job After approving the transfer we can initiate the payment frontend src components PayWithStableButton tsxconst contract new web eth Contract PaymentReceiverAbi as AbiItem paymentRequest receiver options address const tx await contract methods payWithErc process env REACT APP STABLECOINS identifies the ERC contract weiPrice price in USD it s a stablecoin paymentRequest idUint the paymentRequest s id as uint send from account Signing Download RequestsFinally our customer can download their eBook But there s an issue Since we don t have a logged in user how do we ensure that only users who actually paid for content can invoke our download route The answer is a cryptographic signature Before redirecting users to our backend the lt DownloadButton gt component allows users to sign a unique message that is submitted as a proof of account control frontend src components DownloadButton tsxconst download async gt const url process env REACT APP BOOK SERVER books book ISBN download const nonce Web utils randomHex const dataToSign Web utils keccak account book ISBN nonce const signature await web eth personal sign dataToSign account const resp await await axios post url address account nonce signature responseType arraybuffer data present that buffer as download to the user The backend s download route can recover the signer s address by assembling the message in the same way the user did before and calling the crypto suite s ecrecover method using the message and the provided signature If the recovered address matches a fulfilled PaymentRequest on our database we know that we can permit access to the requested eBook resource backend src server tsapp post books isbn download async req DownloadBookRequest res Response gt const signature address nonce req body rebuild the message the user created on their frontend const signedMessage Web utils keccak address req params isbn nonce recover the signer s account from message amp signature const signingAccount await web eth accounts recover signedMessage signature false if signingAccount address return res status json error not signed by address deliver the binary content The proof of account ownership presented here is still not infallible Anyone who knows a valid signature for a purchased item can successfully call the download route The final fix would be to create the random message on the backend first and have the customer sign and approve it Since users cannot make any sense of the garbled hex code they re supposed to sign they won t know if we re going to trick them into signing another valid transaction that might compromise their accounts Although we ve avoided this attack vector by making use of web s eth personal sign method it is better to display the message to be signed in a human friendly way That s what EIP achievesーa standard already supported by MetaMask Conclusion and Next StepsAccepting payments on ecommerce websites has never been an easy task for developers While the web ecosystem allows storefronts to accept digital currencies the availability of service independent plugin solutions falls short This article demonstrated a safe simple and custom way to request and receive crypto payments There s room to take the approach a step or two further Gas costs for ERC transfers on the Ethereum mainnet are exceeding our book prices by far Crypto payments for low priced items would make sense on gas friendly environments like Gnosis Chain their native Ether currency is DAI so you wouldn t even have to worry about stablecoin transfers here or Arbitrum You could also extend the backend with cart checkouts or use DEXes to swap any incoming ERC tokens into your preferred currency After all the promise of web is to allow direct monetary transactions without middlemen and to add great value to online stores that want to engage their crypto savvy customers	2022-07-05 20:11:32
Apple	AppleInsider - Frontpage News	Apple releases new firmware update for redesigned Siri Remote	https://appleinsider.com/articles/22/07/05/apple-releases-new-firmware-update-for-redesigned-siri-remote?utm_medium=rss	Apple releases new firmware update for redesigned Siri RemoteApple has released a new firmware version for its Apple TV Siri Remote though it isn t clear what the update contains Siri RemoteThe firmware update which brings the software to version M is meant for the redesigned Siri Remote released in Read more	2022-07-05 20:11:46
海外科学	NYT > Science	James Bardeen, an Expert on Unraveling Einstein’s Equations, Dies at 83	https://www.nytimes.com/2022/07/03/science/space/james-bardeen-an-expert-on-unraveling-einsteins-equations-dies-at-83.html	James Bardeen an Expert on Unraveling Einstein s Equations Dies at A scion of a renowned family of physicists he helped set the stage for what has been called the golden age of black hole astrophysics	2022-07-05 20:06:27
ニュース	BBC News - Home	Rishi Sunak's and Sajid Javid's resignation letters in full	https://www.bbc.co.uk/news/uk-politics-62058236?at_medium=RSS&at_campaign=KARANGA	boris	2022-07-05 20:42:00
ニュース	BBC News - Home	Euro 2022: Biggest women's sporting event in European history ready for lift-off	https://www.bbc.co.uk/sport/football/61717253?at_medium=RSS&at_campaign=KARANGA	england	2022-07-05 20:02:26
ビジネス	ダイヤモンド・オンライン - 新着記事	メガバンク主導の新決済インフラ「ことら」、業界内で「野望大き過ぎ」と言われる理由 - 金融DX大戦	https://diamond.jp/articles/-/305404		2022-07-06 05:25:00
ビジネス	ダイヤモンド・オンライン - 新着記事	ラオックス会長が絡む東北スキーリゾート開発進展の意外な事情、中国の教育規制が追い風 - ホテルの新・覇者	https://diamond.jp/articles/-/305769	中国本土	2022-07-06 05:20:00
ビジネス	ダイヤモンド・オンライン - 新着記事	「業績回復が遅い」企業は？予想減益率ランキング【ワースト40社】2位関西電力、1位は？ - 決算書100本ノック！2022夏	https://diamond.jp/articles/-/305318	資源価格	2022-07-06 05:15:00
ビジネス	ダイヤモンド・オンライン - 新着記事	KDDI通信パンクの異常事態、社会インフラの脆弱性が「安全保障」の脅威に - Diamond Premium News	https://diamond.jp/articles/-/305957	社会インフラ	2022-07-06 05:10:00
ビジネス	ダイヤモンド・オンライン - 新着記事	大成建設、清水建設…ゼネコン決算で「増収・大減益」続出、異常事態の要因は？ - ダイヤモンド 決算報	https://diamond.jp/articles/-/305946	大成建設、清水建設…ゼネコン決算で「増収・大減益」続出、異常事態の要因はダイヤモンド決算報コロナ禍が落ち着き始めたことで、市況も少しずつ回復しつつある。	2022-07-06 05:05:00
ビジネス	電通報 | 広告業界動向とマーケティングのコラム・ニュース	アスリートブレーンズ為末大の「緩急自在」vol.22	https://dentsu-ho.com/articles/8201	緩急自在	2022-07-06 06:00:00
北海道	北海道新聞	ＮＹ株反落、１２９ドル安　景気後退への警戒感で	https://www.hokkaido-np.co.jp/article/702225/	景気後退	2022-07-06 05:47:00
北海道	北海道新聞	ＮＹ原油急落、１００ドル割れ　２カ月半ぶり安値	https://www.hokkaido-np.co.jp/article/702224/	連休明け	2022-07-06 05:47:00
北海道	北海道新聞	英国の財務相と保健相が辞任　ジョンソン首相、窮地に	https://www.hokkaido-np.co.jp/article/702219/	首相	2022-07-06 05:47:22
北海道	北海道新聞	女装し犯行、７０発以上乱射　米銃撃容疑者、事前に計画	https://www.hokkaido-np.co.jp/article/702221/	銃撃	2022-07-06 05:27:00
北海道	北海道新聞	＜社説＞ルガンスク制圧　不当な支配認められぬ	https://www.hokkaido-np.co.jp/article/702190/	不当な支配	2022-07-06 05:01:00
北海道	北海道新聞	＃参院選２０２２　＃大学に投票所　若者の投票率向上へ工夫	https://www.hokkaido-np.co.jp/article/702117/	引き下げ	2022-07-06 05:03:00
北海道	北海道新聞	夢さぽピックアップ	https://www.hokkaido-np.co.jp/article/702111/	舌戦	2022-07-06 05:01:00
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ビジネス	東洋経済オンライン	明石市｢9年連続人口増｣実現した子育て民主主義 泉市長｢子どもを増やすには商人を儲けさせよ｣ | 最新の週刊東洋経済 | 東洋経済オンライン	https://toyokeizai.net/articles/-/600515?utm_source=rss&utm_medium=http&utm_campaign=link_back	兵庫県明石市	2022-07-06 05:20:00