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Ethereum completes the “Merge,” which ends mining and cuts energy use by 99.95% – Ars Technica

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Illustration of a blockchain concept with transparent cubes linked together. The cubes are covered in ones and zeroes.
Getty Images | Yuichiro Chino

Ethereum developers today executed the “Merge,” an upgrade that eliminates mining and dramatically reduces the energy consumption of the world’s second-biggest cryptocurrency. Today’s action “completed Ethereum’s transition to proof-of-stake consensus, officially deprecating proof-of-work and reducing energy consumption by ~99.95 percent,” the Ethereum.org Merge page said.

The Ethereum blockchain has existed since July 2015, and planning for today’s change has been in the works for several years. Because a botched transition could have caused chaos, Ethereum developers over the past year have “repeatedly pushed back the date of ‘the Merge’ to give themselves more time to prepare,” as Ars writer Timothy B. Lee previously wrote in a detailed feature on the transition. The Merge will “put the world’s Ethereum miners out of work,” as the new system doesn’t require the powerful graphics cards previously needed to maintain the blockchain and create new ether, Lee wrote.

The switch was highly anticipated. “When the Merge officially kicked in at 6:43 a.m. UTC, more than 41,000 people were tuned in on YouTube to an ‘Ethereum Mainnet Merge Viewing Party,'” CoinDesk wrote. “They watched with bated breath as key metrics trickled in suggesting that Ethereum’s core systems had remained intact. After about 15 long minutes, the Merge officially finalized, meaning it could be declared a success.”

Before the Merge, Ethereum’s annualized power consumption was comparable to the country of Chile’s, and its carbon footprint was similar to Hong Kong’s, according to Digiconomist’s Ethereum Energy Consumption Index.

The ether price was down almost 9 percent today as of this writing, while bitcoin had dropped about 2.4 percent.

No more mining

The official Ethereum website explains that the Merge “was the joining of the original execution layer of Ethereum (the Mainnet that has existed since genesis) with its new proof-of-stake consensus layer, the Beacon Chain. It eliminated the need for energy-intensive mining and instead enabled the network to be secured using staked ETH.”

The Beacon Chain was created in December 2020 “as a separate blockchain to Mainnet, running in parallel.” After a lot of testing, it was ready to take over.

“The Beacon Chain was not originally processing Mainnet transactions. Instead, it was reaching consensus on its own state by agreeing on active validators and their account balances,” the Ethereum.org merge page says. “After extensive testing, it became time for the Beacon Chain to reach consensus on real world data. After The Merge, the Beacon Chain became the consensus engine for all network data, including execution layer transactions and account balances.”

Now that the change is complete, “mining is no longer the means of producing valid blocks. Instead, the proof-of-stake validators have adopted this role and are now responsible for processing the validity of all transactions and proposing blocks.” The joining of Mainnet with the Beacon Chain “also merged the entire transactional history of Ethereum,” so no history was lost in the process.

The change should be seamless for people who hold ether. Funds will still be accessible without any user action. “There is no such thing as ‘old ETH’/’new ETH’ or ‘ETH1’/’ETH2’ and wallets work exactly the same after The Merge as they did before—people telling you otherwise are likely scammers,” the Ethereum project said.

Less ether will be issued

Another Ethereum.org page explains how the issuance of ether will change post-Merge and why less ether needs to be issued:

Validators on the Beacon Chain are rewarded with ETH for attesting to the state of the chain and proposing blocks. Rewards (or penalties) are calculated and distributed at each epoch (every 6.4 minutes) based on validator performance. The validator rewards are significantly less than the miner rewards issued on proof-of-work (2 ETH every ~13.5 seconds), as operating a validating node is not an economically intense activity and thus does not require or warrant as high a reward.

By contrast, “mining is an economically intensive activity, requiring high levels of ETH issuance to sustain,” the page says. Before the Merge, mining rewards totaled about 13,000 ETH per day, and rewards for staking were 1,600 ETH per day.

“After The Merge, only the ~1,600 ETH per day will remain, dropping total new ETH issuance by ~90 percent,” the page says. To participate, “validators explicitly stake capital in the form of ETH into a smart contract on Ethereum,” according to the proof-of-stake explanation. “This staked ETH then acts as collateral that can be destroyed if the validator behaves dishonestly or lazily.”

A validator must deposit 32 ETH into the deposit contract and run software including an execution client, a consensus client, and a validator.

“Whereas under proof-of-work, the timing of blocks is determined by the mining difficulty, in proof-of-stake, the tempo is fixed,” the proof-of-stake page says. “Time in proof-of-stake Ethereum is divided into slots (12 seconds) and epochs (32 slots). One validator is randomly selected to be a block proposer in every slot. This validator is responsible for creating a new block and sending it out to other nodes on the network. Also in every slot, a committee of validators is randomly chosen, whose votes are used to determine the validity of the block being proposed.”

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Dollarama keeping an eye on competitors as Loblaw launches new ultra-discount chain

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Dollarama Inc.’s food aisles may have expanded far beyond sweet treats or piles of gum by the checkout counter in recent years, but its chief executive maintains his company is “not in the grocery business,” even if it’s keeping an eye on the sector.

“It’s just one small part of our store,” Neil Rossy told analysts on a Wednesday call, where he was questioned about the company’s food merchandise and rivals playing in the same space.

“We will keep an eye on all retailers — like all retailers keep an eye on us — to make sure that we’re competitive and we understand what’s out there.”

Over the last decade and as consumers have more recently sought deals, Dollarama’s food merchandise has expanded to include bread and pantry staples like cereal, rice and pasta sold at prices on par or below supermarkets.

However, the competition in the discount segment of the market Dollarama operates in intensified recently when the country’s biggest grocery chain began piloting a new ultra-discount store.

The No Name stores being tested by Loblaw Cos. Ltd. in Windsor, St. Catharines and Brockville, Ont., are billed as 20 per cent cheaper than discount retail competitors including No Frills. The grocery giant is able to offer such cost savings by relying on a smaller store footprint, fewer chilled products and a hearty range of No Name merchandise.

Though Rossy brushed off notions that his company is a supermarket challenger, grocers aren’t off his radar.

“All retailers in Canada are realistic about the fact that everyone is everyone’s competition on any given item or category,” he said.

Rossy declined to reveal how much of the chain’s sales would overlap with Loblaw or the food category, arguing the vast variety of items Dollarama sells is its strength rather than its grocery products alone.

“What makes Dollarama Dollarama is a very wide assortment of different departments that somewhat represent the old five-and-dime local convenience store,” he said.

The breadth of Dollarama’s offerings helped carry the company to a second-quarter profit of $285.9 million, up from $245.8 million in the same quarter last year as its sales rose 7.4 per cent.

The retailer said Wednesday the profit amounted to $1.02 per diluted share for the 13-week period ended July 28, up from 86 cents per diluted share a year earlier.

The period the quarter covers includes the start of summer, when Rossy said the weather was “terrible.”

“The weather got slightly better towards the end of the summer and our sales certainly increased, but not enough to make up for the season’s horrible start,” he said.

Sales totalled $1.56 billion for the quarter, up from $1.46 billion in the same quarter last year.

Comparable store sales, a key metric for retailers, increased 4.7 per cent, while the average transaction was down2.2 per cent and traffic was up seven per cent, RBC analyst Irene Nattel pointed out.

She told investors in a note that the numbers reflect “solid demand as cautious consumers focus on core consumables and everyday essentials.”

Analysts have attributed such behaviour to interest rates that have been slow to drop and high prices of key consumer goods, which are weighing on household budgets.

To cope, many Canadians have spent more time seeking deals, trading down to more affordable brands and forgoing small luxuries they would treat themselves to in better economic times.

“When people feel squeezed, they tend to shy away from discretionary, focus on the basics,” Rossy said. “When people are feeling good about their wallet, they tend to be more lax about the basics and more willing to spend on discretionary.”

The current economic situation has drawn in not just the average Canadian looking to save a buck or two, but also wealthier consumers.

“When the entire economy is feeling slightly squeezed, we get more consumers who might not have to or want to shop at a Dollarama generally or who enjoy shopping at a Dollarama but have the luxury of not having to worry about the price in some other store that they happen to be standing in that has those goods,” Rossy said.

“Well, when times are tougher, they’ll consider the extra five minutes to go to the store next door.”

This report by The Canadian Press was first published Sept. 11, 2024.

Companies in this story: (TSX:DOL)

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U.S. regulator fines TD Bank US$28M for faulty consumer reports

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TORONTO – The U.S. Consumer Financial Protection Bureau has ordered TD Bank Group to pay US$28 million for repeatedly sharing inaccurate, negative information about its customers to consumer reporting companies.

The agency says TD has to pay US$7.76 million in total to tens of thousands of victims of its illegal actions, along with a US$20 million civil penalty.

It says TD shared information that contained systemic errors about credit card and bank deposit accounts to consumer reporting companies, which can include credit reports as well as screening reports for tenants and employees and other background checks.

CFPB director Rohit Chopra says in a statement that TD threatened the consumer reports of customers with fraudulent information then “barely lifted a finger to fix it,” and that regulators will need to “focus major attention” on TD Bank to change its course.

TD says in a statement it self-identified these issues and proactively worked to improve its practices, and that it is committed to delivering on its responsibilities to its customers.

The bank also faces scrutiny in the U.S. over its anti-money laundering program where it expects to pay more than US$3 billion in monetary penalties to resolve.

This report by The Canadian Press was first published Sept. 11, 2024.

Companies in this story: (TSX:TD)

The Canadian Press. All rights reserved.

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Amazon rejects plea to stop selling taxi roof signs as cab scam spreads across Canada

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After a long day at a work event in July, Kathryn Kozody was relieved when she spotted a car with a lit-up taxi sign.

She thought it was odd when the driver told her she’d have to pay her fare with a debit card. Still, a tired Kozody hopped in the car.

“I was like, ‘Fine, it’s kind of weird, but let’s go home,'” said Kozody, who lives in Calgary.

Nothing else seemed off — until the next day when she discovered that almost $2,000 was missing from her bank account. On top of that, her debit card had someone else’s name on it.

Kozody concluded that the taxi driver was a fraudster who, during the debit card transaction, recorded her PIN, stole her card and handed her back a fake.

“I started freaking out,” she said. “It’s terrifying when they have your debit card.”

It took Kozody about two weeks to get her money back from her bank, and she’s still rattled by the experience.

 Kathryn Kozody standing on the street
The day after taking what she thought was a ride in a taxi, Kathryn Kozody of Calgary found out someone had withdrawn almost $2,000 from her bank account. (James Young/CBC News)

“It really felt like an invasion of privacy and a violation to be a victim of this scam,” she said. “I really don’t want it to happen to anybody else.”

The taxi scam isn’t new; Toronto and Montreal have been seeing it for years. But the crime is becoming more widespread.

This summer, police in Calgary, Edmonton and at least five cities in southern Ontario, including Kingston and Ottawa, posted warnings online that they had received multiple reports of the scam.

Police and the Canadian Taxi Association say the fraudsters have a helping hand: with the click of a button, they can purchase a generic — but official looking — taxi roof sign on e-commerce sites like Amazon.

A Facebook post by the Edmonton Police.
Edmonton Police posted this alert on Facebook in July, warning people about an ongoing taxi scam. The city’s police department says that it received about 10 reports of the scam that month. (Edmonton Police/Facebook )

The taxi association has asked Amazon, by far Canada’s most popular online shopping site, to stop making the roof signs so easily available.

“They do have a moral responsibility to at least sell the signs to individuals that are properly licensed,” said association president Marc André Way.

However, the U.S.-based company continues to sell the product to all customers.

“These lights are legal to sell in Canada,” Amazon told CBC News in an email.

‘Eye-popping’ numbers

The taxi scam has several variations but typically ends the same way: the victim pays with a debit card, then the scammer secretly steals it and hands the victim a similar but fake card. Shortly thereafter, money disappears from the victim’s account.

Ron Hansen, deputy chief of police in Sarnia, Ont., said his department received 12 reports of the scam in July, with one victim losing $9,900.

Toronto police report that since June 2023 the department has received 919 reports of the taxi scam, totalling $1.7 million in losses.

Jessica Chin King standing on the street.
Jessica Chin King of Toronto said after a recent cab ride, she got a suspicious activity alert from her bank. She learned $600 had been withdrawn from her account. (Craig Chivers/CBC)

The numbers are “eye-popping,” said Toronto police detective David Coffey.

“When they do get a victim, they are quick to go right into the bank accounts. They’re quick to empty them out.”

Jessica Chin King of Toronto said just 15 minutes after a recent cab ride, she got a suspicious activity alert from her bank. Turns out, $600 had been withdrawn from her account.

“I was like, ‘Wow, I can’t believe that just happened.’ I was in shock,” said Chin King, whose bank later reimbursed the cash.

She said she too was fooled by the taxi sign atop the car.

“I was in the car with somebody who wasn’t a taxi driver. Anything could have happened,” she said. “I was thankful that it was only my bank [account] that was compromised.”

Taxi light for $35 on Amazon

CBC News bought a taxi sign from Amazon for $35. It has a magnetic strip on the bottom, so it easily sticks to the top of a car.

To power the light, an attached wire can be run through the driver’s window and plugged into the car’s auxiliary power outlet, also known as the cigarette lighter outlet.

The taxi association says licensed taxi drivers typically get their roof signs from speciality suppliers, and they are hardwired to the car — not powered via the cigarette lighter.

“When you see that … it’s obvious that it’s not a legitimate taxi,” said Way, the association president.

Last month, Way sent Amazon a letter on behalf of the Canadian Taxi Association, asking it to stop selling the product.

“This is not a safe, practical way to distribute the trusted ‘Taxi’ signs,” he wrote.

A yellow taxi sign with an attached wire.
CBC News ordered this $35 taxi sign on Amazon. The attached wire can be run through the driver’s window and plugged into the car’s auxiliary power outlet, while the lights for licensed drivers are hardwired into the vehicle. (Sophia Harris/CBC News)

But Amazon told Way — and CBC News — the signs will remain on its site, because the company isn’t breaking any rules.

“It’s going to be quite difficult, I think, for anyone to stop Amazon from selling a product that is perfectly legal to sell,” said Toronto criminal lawyer, Daniel Goldbloom. “It’s true that these taxi signs can be used to commit scams, but kitchen knives can be used to commit murder — and we don’t stop retailers from selling those.”

But Way isn’t giving up hope.

He says the taxi association also plans to ask other online retailers, such as Temu and eBay, to stop selling the taxi signs and will lobby provincial governments for legislation that regulates the sale of the product.

However, Coffey said he believes the best way to fight the taxi scam is to educate people about it.

“Never, never give another person control of your debit card,” the detective said.

Victims Chin King and Kozody also want to spread the word.

“The more people know, the less likely it is to happen again to somebody else,” Kozody said.

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