Where?

You can find the DAPP here — https://uniswap-v3.scroll.io/#/swap

How?

First of all, please make sure that you are connected to the Scroll Alpha testnet. To do that, follow the instructions here or read my earlier guide on ‘Getting started with Scroll zkEVM.’

Step 1 — Wrapping ETH to WETH

Assuming that you have followed through with the instructions in my guide earlier, you should have a few ETH on the Scroll Alpha testnet now.

First, to get familiar with the Uniswap UI, let’s try ‘wrapping’ and ‘unwrapping’ WETH. The screens should look like these for the two swaps.

On the Scroll block explorer, these will be shown as ‘Withdraw’ and ‘Deposit’ transactions — https://blockscout.scroll.io/address/0xfA205A82715F144096B75Ccc4C543A8a2D4CcfaF

Step 2 — Get some USDC

Now that you know how to wrap and unwrap ETH, let’s get our hands on some USDC!

Please note that since this is a testnet, there might be a LOT of USDC and other so-called ‘stablecoins’ floating around. That is because on a testnet, anyone can create any random, arbitrary ERC20 token, call it USDC and give it any amount of ‘supply’. For this guide, you can very well choose any other ERC20 token, it doesn’t matter!

For this guide, I have chosen one such USDC token that seems popular and has some liquidity in the Uniswap pool. The address for this token is 0xA0D71B9877f44C744546D649147E3F1e70a93760.

Coming back to the Uniswap UI, for the second token, we need to choose this particular USDC token. For that, click on the second token dropdown and manually paste the above address in the popup and select this ‘USD Coin’. The screens should look like these —

Please note that while choosing USDC in the popup, Uniswap will show you a warning. You can safely ignore that on this testnet.

Also note that the ETH-USDC price in your case might be completely different than the screenshot above.

Step 3 — Add liquidity to the ETH — USDC pool

To add liquidity and get the coveted Uniswap NFT, go to https://uniswap-v3.scroll.io/#/pool and click the ‘New Position’ button.

The Add Liquidity popup has a lot of options, and I will not discuss that in this guide. Roughly, your choices should look like these —

For this beginner’s guide, the most important thing is to manage the Price Range such that you can see the ‘Preview’ button activated. Since this is a testnet and doesn’t reflect the price of USDC in real life, the range will vary wildly here. Also, because this pool doesn’t have a lot of liquidity, it can change quite often and quite drastically. Hence, don’t worry about that range. Just play around until you can add some liquidity.

The most important thing on this screen, for now, is the amount of liquidity you provide to this pool. Please ensure you don’t send all of your ETH since Goerli ETH is not readily available. You can send something like 0.01 or 0.02 ETH to get the hang of things!

Once you fill up all the correct values on the above popup, you must approve and submit a couple of transactions on Metamask. Once you do that, you should see a new position on your ‘Pools’ screen.

If you can click on this position, you will have an NFT associated with this position. The NFT looks beautiful, and you can do a bunch of things here —

1. Add liquidity

2. Remove liquidity

3. Collect your fees

You can even transfer/sell this NFT to someone else so that they obtain the liquidity position on this pool, though that is out of the scope of this guide.

Step 4 (optional) — Add liquidity on other pairs!

Now that you know how to use the Uniswap UI on Scroll, you can play around a bit more, try to find some other stablecoins with enough liquidity and add liquidity there!

• Bitcoin mining is the process of discovering new blocks, verifying transactions and adding them to the Bitcoin blockchain.

• Each time a new block is discovered, the successful miner is granted the right to fill that block with new transaction data.

• In return for dedicating time and resources to performing this task, winning miners receive a free amount of newly minted bitcoin known as a “block reward” as well as any fees attached to transactions they store in the new blocks.

• The process of giving successful miners newly minted bitcoin is exclusively how new coins enter circulation.

Why mine bitcoin?

There are two primary reasons why a person, or company, would want to mine cryptocurrency like bitcoin.

•To stand a chance of earning bitcoin block rewards (which, as of 2022, equals 6.25 bitcoins –approximately $210,000, at press time.) New blocks are roughly discovered once every 10 minutes.

•To participate in securing and maintaining the decentralized Bitcoin network.

How do bitcoin miners discover new blocks?

In order to validate and add new transactions to the blockchain, miners must compete with each other using specialized computing equipment. They use their equipment to generate fixed-length codes known as “hashes” (see below.) In order to discover the next block, miners must generate a hash that has an equal or higher number of zeros in front of it than the “target hash.”

The target hash is a 64-digit hexadecimal code (comprising numbers 0-9 and letters A-F) all miners are trying to get below in order to discover the next block.

As a starting point, all miners take the data from the previous block, known as the “block header”– which contains things like a timestamp of the block, the hash of the previous block data, and an empty space known as a “cryptographic nonce.” Most of the data in the block header is fixed, meaning it cannot be changed, apart from the nonce. A nonce means “a number only used once” and is the part of the previous block header that miners are allowed to tweak. Remember, just changing a single bit of the input produces a totally different hash.

The tricky part is, hashes are generated completely at random, meaning it’s impossible for miners to know what the hashes will be before they generate them. So it’s simply a case of trial and error until someone finds the right nonce value – known as the “golden nonce.”

This is why miners have to invest in energy-intensive computers, particularly application-specific integrated circuit (ASIC) miners, that can generate trillions of hashes per second.

An easy way to think of bitcoin mining is to imagine each new block is a treasure chest with a combination lock on it. To get the free bitcoin block reward inside and win the right to add new transaction data into it (and collect the associated fees) you have to keep turning one of the number wheels on the lock (the nonce) until you crack the combination (the target hash.)

Here’s an example of what a target hash might look like:

0000000000000000057fcc708cf0130d95e27c5819203e9f967ac56e4df598ee

To see just how difficult it is to generate a hash with more zeros at the front than the above target hash, try creating a winning hash yourself with this free online hash generator. Simply type anything you want in the text box provided and see if it produces a hash with more than 17 zeros at the front!

What is a hash?

A hash is a cryptographic mathematical function that converts any message or data input into a fixed-length code. Think of it as an encryption technique where messages are mathematically transposed into a sequence of numbers and letters of a fixed length.

The outputs have set lengths to make it impossible to guess the size of the input. For instance, the hash for the word “hi” would be exactly the same length as the hash of the entire text of a Harry Potter book.

These hash functions are irreversible, meaning that it’s impossible to revert the hash back to its original input. The same input will also always generate the same sequence of letters and numbers. For example, the hash of “hi” will be the same code every time. Each code generated is completely unique too, meaning it’s impossible to produce the same hash with two different inputs.

In the case of Bitcoin, the blockchain uses Secure Hash Algorithm 256 or SHA 256 to generate a 256 bit or 64 characters long output, regardless of the size of the input.

How rewarding is bitcoin mining?

For every new block added to the blockchain, the protocol – a set of rules programmed into Bitcoin – releases a fixed amount of newly minted coins to the successful miner. This block reward system doubles as the distribution mechanism for Bitcoin.

As part of the programmed measures introduced by Satoshi Nakamoto to steadily decrease the number of bitcoins released over time, the coins awarded to miners are slashed roughly every four years, or 210,000 blocks, in a process known as a “Bitcoin Halving.” In 2009, the block reward was 50 BTC. This figure was reduced to 25 BTC in 2013. The most recent halving occurred in 2020, and saw block rewards fall from 12.5 BTC to 6.25 BTC.

Note that bitcoin has a 21 million maximum supply cap, and we already have 18.9 million coins in circulation. Block rewards will no longer be distributed once 21 million BTC has been released to the market. Once this happens, miners will only be able to earn rewards in the form of bitcoin transaction fees.

Even with this combination of two revenue sources, not every miner generates profits. To make ends meet, a miner’s earnings must exceed the amount spent on electricity and the purchase and maintenance of mining rigs. Also, as mining difficulty increases, large mining operations are forced to expand or upgrade their equipment to maintain a competitive edge. For most average miners who cannot afford to invest in expensive equipment, there’s an opportunity to combine their resources with other miners around the world. Each miner agrees to share rewards according to the contributions of each miner. These networks of miners are called “mining pools.”

There are, however, some rare instances where solo miners have successfully mined blocks on their own from home.

Bitcoin mining difficulty

An important thing to know about Bitcoin is that when Satoshi Nakamoto created the protocol, they programmed in a target block discovery time of 10 minutes. This means it should take approximately 10 minutes for a miner to successfully create the winning code to discover the next block.

So how does the network ensure new blocks are discovered every 10 minutes?

The Bitcoin protocol has the ability to automatically increase or decrease the complexity of the mining process depending on how quickly or slowly blocks are being found.

Every two weeks, the Bitcoin protocol automatically adjusts the target hash to make it harder or easier for miners to find blocks. If they are taking too long (more than 10 minutes) the difficulty will adjust downward; less than 10 minutes, it will adjust upward. More specifically, the protocol will increase or decrease the number of zeros at the front. This might not sound like much, but just adding a single zero to the target hash makes the code significantly harder to beat, and vice versa.

The 2021 crackdown on mining activities in China caused bitcoin’s network difficulty to experience its biggest drop in history. This subsequently led to remaining bitcoin miners reporting significant rises in mining revenue.

While actively participating in the Bitcoin network can be a highly rewarding venture, the electricity and hardware requirements often limit its profitability – particularly for miners with limited resources.

Why does bitcoin mining use so much energy?

One of the biggest drawbacks of Bitcoin is the vast amount of energy it uses to mine new coins, validate transactions and secure its network. At press time, Bitcoin's hash rate – the measure of all computational power dedicated to mining new coins – stands at 183 exahash (Eh/s.) This means bitcoin miners collectively attempt to crack the target hash of the next new block 183 quintillion times per second.

According to the Cambridge Bitcoin Electricity Consumption Index (CBECI,) this activity consumes approximately 131 TeraWatt hours (TWh) of electricity per year – which is more electricity than the country of Ukraine consumes during the same time period.

The main reason for this extreme consumption is because each time bitcoin rises in price, it encourages new miners to join in the battle to win new coins and forces existing outfits to purchase more rigs or upgrade their equipment to remain competitive. When this happens, the amount of computational power used to mine bitcoin increases (hash rate increases) which, in turn, causes the bitcoin protocol to ramp up the difficulty so that blocks continue to be discovered at a steady rate every 10 minutes.

A natural byproduct of this increased competition is higher energy consumption – the more machines whirring away to mine bitcoin, the higher the collective energy consumption.

Bitcoin ATMs aren’t like bank ATMs that allow customers to manage the funds in their accounts. Bitcoin ATMs are simply tools through which you can make bitcoin purchases – and sometimes sales – and do not require users to create any sort of account to do so.

Unlike cryptocurrency exchanges, bitcoin ATMs give users the option to custody their own purchased bitcoin by wiring the coins directly to a crypto wallet of their choice. However, if you use centralized exchanges like Binance or Coinbase (COIN), you can also opt to have your coins sent to your “deposit address” provided by your exchange and let the platform custody the assets for you.

How to buy bitcoin from a bitcoin ATM

When you spot a bitcoin ATM, you’ll often find it has a QR code plastered on it prompting you to download a particular crypto wallet that’s supported by the ATM machine.

A popular option is the Coinbase crypto wallet, but you can choose from a long list of other wallets, too.

You’ll first need to download the wallet, if you haven’t already, and follow any setup instructions when prompted.

Your newly created wallet will generate a unique bitcoin address to which the ATM will send your purchased coins after the transaction is confirmed and completed.

Bitcoin ATMs are meant to be an intuitive experience for anyone who’s used an ATM before, so all you’ll need to do is just follow instructions on the screen.

Machines will vary somewhat depending on country and location, and some may require you to complete know-your-customer (KYC) steps before permitting the purchase. Minimum and maximum purchase amounts may also vary.

After setting up the wallet and locating your wallet address for inbound transactions, you’ll want to key in the amount you wish to purchase and enter your crypto wallet address. This is usually done automatically by scanning the QR code on your phone screen rather than typing it in manually (which can lead to mistakes and cause your funds to be lost forever.)

The transaction usually takes around 10 minutes to be completed, although it might also take as long as an hour.

Advantages and disadvantages of bitcoin ATMs

For users who aren’t tech-savvy, bitcoin ATMs are an excellent gateway into crypto. Fortunately, it doesn’t come at the cost of compromised security because most ATMs don’t store users’ KYC information, bank details or private keys.

But there are some obvious disadvantages. Bitcoin ATMs charge exorbitant fees – 7%-20% in some cases – and there are also more stringent limits on purchases compared to a cryptocurrency exchange. Also, in the event anything goes wrong, there’s little to no customer support available.

Beware of scams involving bitcoin ATMs

There are two scams that involve using bitcoin ATMs.

Scammers often advertise goods for sale on sites like eBay, Craigslist or Gumtree (UK). These items are typically priced at a significant discount to the usual market rate, luring potential buyers to get in touch.

The scammers tell victims they must make purchases via crypto if they want to secure those prices – usually by depositing funds into a bitcoin ATM and sending the crypto to the scammers’ wallet address. Once the transaction is completed, the scammers vanish.

This is popular with scammers because of the irreversible and largely unregulated nature of blockchain-based payments. Once a transaction is finalized, it’s next to impossible to reverse it.

Another type of bitcoin ATM scam is more convoluted and sinister.

Scammers often target individuals seeking employment and offer them trial work. The trial involves scammers sending money to a person's bank account and then telling the person to withdraw it and convert the funds into bitcoin at a bitcoin ATM, then transfer the cryptocurrency to the scammers’ address.

A few days later, however, the money sent to the victim’s account is reversed because it originated from a stolen account. That leaves the victim’s account with a negative balance.

Overall, if you’re looking to purchase a reasonable amount of bitcoin in a relatively private manner and you’re not particularly bothered about paying high fees, then a bitcoin ATM could be a good choice for you – provided there are machines in your area, of course. Otherwise, using an exchange or purchasing bitcoin through apps you most likely already have on your smartphone are also good options.

While it may not always be possible to follow the same timeline for new feature releases or updates, the Nodle team is committed to ensuring that both iOS and Android users have access to the same features and functionalities. By working closely with both Apple and Google, the team constantly strives to improve and streamline the NFT minting process on the Nodle App for all users.

This guide will cover the specifics of each operating system’s available features.

Camera Roll Feature

The Camera Roll feature is available on iOS and Android and works the same way on both operating systems. With this feature, you can take a new photo or choose an existing one from your camera roll to turn into an NFT. To do this, simply select the Camera Roll option and choose the photo you want to use.

Microsite Feature

The Microsite is a valuable feature available on both iOS and Android. With this feature, you can send a viewing link to anyone to view your NFT or collection of NFTs. The viewer can see the NFTs without installing the Nodle App. This feature is particularly useful for sharing your NFTs with friends and family who may not have the Nodle App installed.

NFT Minting Fee

The NFT Minting Fee is another crucial aspect of creating and minting NFTs on the Nodle App. The way in which the fee is paid varies depending on the operating system.

iOS users can pay the minting fee through in-app purchases. Unfortunately, NFTs cannot be minted with NODL on iOS at the moment. This means that iOS users must use the in-app purchase method to create and mint their NFTs.

On the other hand, Android users can pay the minting fee with NODL tokens. Currently, in-app purchases are not available for Android users. This means that Android users must have NODL tokens to create and mint their NFTs. If you don’t have NODL tokens, you can purchase from various cryptocurrency exchanges that NODL is trading on.

Conclusion

In conclusion, the Nodle App is an excellent platform for creating and minting NFTs. With its various features, such as Camera Roll and Microsite, you can easily create and share your NFTs with others. However, it’s important to note that regardless of which operating system you are using, the Nodle App makes it easy to create and mint your very own NFTs. Happy NFT minting!

Nodle connects the physical world to Web3 by using smartphones as edge nodes. The edge nodes read devices and sensors in the physical world using Bluetooth Low Energy (BLE) and connect that information to the blockchain. Creating a geolocation-based layer one that can be used by many unique applications built for the hyper-connected, mobile-oriented world we live in, including real-time asset tracking. Nodle creates an economic model that is secure, private, and scalable. Anyone with a smartphone can join the network in return for Nodle tokens ($NODL). Nodle provides insights for consumer electronics manufacturers, enterprises, smart cities, the finance industry and beyond. Since its creation in 2017, Nodle has become one of the world’s largest wireless networks by number of base stations. To join, download the Nodle app for iOS or Android.

On March 20–24, Paris Blockchain Week 2023 will run in the French capital, bringing together thousands of people who shape the future of the blockchain/crypto industry.

The organizers claim that this year’s event will be bigger and better than Paris Blockchain Week 2022, which sold out in advance. And the move to the Carrousel du Louvre in the heart of Paris’ historic palace and largest museum in the world suggest that the week-long blockchain

Extravaganza is going to be big!

Certainly, 1inch will have a noticeable presence at Paris Blockchain Week.

On March 22, at 2pm, Sergej Kunz, the 1inch Network’s co-founder, will give a fireside talk, Fusion of Aggregation, on the Master Stage.

Those who will visit the 1inch booth, will have a chance to learn about our products and pick up 1inch merch. There will also be some pleasant surprises! Come see us at the Startup Village, pavilion 63 — next to the Master Stage.

And, of course, no major crypto event can do without a legendary 1inch party. Those who have attended 1inch parties in the past can testify that they had an unforgettable experience. And 1inch’s Paris Blockchain Week party won’t disappoint you! Cirque De La Lune will be held at The Pavillons of Bercy on March 22, at 8pm.

Enjoy Paris Blockchain Week 2023 with the 1inch Network!

ID is the native token of the SPACE ID ecosystem, with the following functions:

• Staking: Stake ID tokens to receive discounts in the SPACE ID domain NFT marketplace trading fees and Web3 domain registration discounts on SPACE ID.

• Payments: Used as a means of payment within the SPACE ID ecosystem and for Web3 Name SDK Integration.

• Governance: ID token holders can participate and vote on SPACE ID DAO proposals