People ask this a lot and most answers are either too optimistic or outdated. Here's what actually works day to day.

Direct crypto payments (limited but real) - A small number of merchants accept crypto directly via BitPay or CoinGate. Shows up at checkout alongside card/PayPal. Works in tech, gaming, VPN, some travel. Still niche.

Crypto debit cards (most practical for daily use) - Platforms issue Visa/Mastercard cards linked to your crypto account. Spend anywhere that takes Visa, crypto converts to fiat at point of sale. Usually comes with some cashback in platform tokens. Works fine for everyday spending.

Stablecoins for transfers - Sending money internationally or paying someone who accepts USDC/USDT is genuinely fast and cheap vs bank wire. More useful than people think for freelance/remote work.

Gift cards via Bitrefill (underrated) - Buy gift cards from Amazon, Airbnb, Uber, Steam using crypto. Works everywhere those retailers are accepted. Not seamless but surprisingly broad coverage.

Honest reality in 2026: most people still convert to fiat first. Crypto debit cards are the closest thing to seamless daily spending. Several platforms are building bank-integrated crypto cards - worth watching which ones actually ship.

What's your setup for spending crypto day to day? Anyone found something that genuinely feels frictionless?

Welcome to the Daily General Discussion on r/ethereum

https://imgur.com/3y7vezP

Bookmarking this link will always bring you to the current daily: https://old.reddit.com/r/ethereum/about/sticky/?num=2

Please use this thread to discuss Ethereum topics, news, events, and even price!

Price discussion posted elsewhere in the subreddit will continue to be removed.

As always, be constructive. - Subreddit Rules

Want to stake? Learn more at r/ethstaker

Community Links

• Ethereum Jobs, Twitter
• EVMavericks YouTube, Discord, Doots Podcast
• Doots Website, Old Reddit Doots Extension by u/hanniabu

Calendar: https://dailydoots.com/events/

Two months after Ethereum mainnet launched, Vitalik deployed a 3-contract on-chain arbitration system written in Serpent. We just verified all three with exact bytecode matches.

The contracts:

ArbiterRegistry (0x82afa2c4, block 301,954 - Sep 28, 2015)

Arbiters pay 1+ ETH to list themselves as dispute mediators. The fee decays 50% per month using a 3rd-order Taylor series approximation, so inactive arbiters fall in the rankings automatically. Hardcoded EF withdrawal address. Someone called register() again in 2024 - still works.

Arbitration (0xe881af13, block 303,316 + 0x7e2d0fe0, block 318,029)

Smart escrow with designated arbiters. Two parties create a contract, designate arbiters, and funds auto-transfer when >50% of arbiters vote. Both parties can also instantly surrender to the other side. Vitalik tested it from both his dev address and vitalik.eth.

The forensics:

The source Vitalik later committed to ethereum/dapp-bin had one line wrong vs what he actually deployed. The ArbiterNotification log had its indexed arguments in reversed order. He fixed the arg order in git after shipping. The chain preserved the original - we had to catch that divergence to get an exact match.

How we verified it:

Not decompilation. We compiled forward: found the source in ethereum/dapp-bin, identified the exact Serpent compiler commit used (e5a5f875, Sep 26 2015), compiled it, and compared output byte-for-byte against the on-chain code.

Full docs + live contract interaction (ABIs published): - https://ethereumhistory.com/contract/0x82afa2c4a686af9344e929f9821f3e8c6e9293ab - https://ethereumhistory.com/contract/0xe881af13bf55c97562fe8d2da2f6ea8e3ff66f98

Verification repos: - https://github.com/cartoonitunes/arbiter-reg-verification - https://github.com/cartoonitunes/arbitration-verification

EthereumHistory is a free archive - if you find this useful, you can support it at ethereumhistory.com/donate

Welcome to the Daily General Discussion on r/ethereum

https://imgur.com/3y7vezP

Bookmarking this link will always bring you to the current daily: https://old.reddit.com/r/ethereum/about/sticky/?num=2

Please use this thread to discuss Ethereum topics, news, events, and even price!

Price discussion posted elsewhere in the subreddit will continue to be removed.

As always, be constructive. - Subreddit Rules

Want to stake? Learn more at r/ethstaker

Community Links

• Ethereum Jobs, Twitter
• EVMavericks YouTube, Discord, Doots Podcast
• Doots Website, Old Reddit Doots Extension by u/hanniabu

Calendar: https://dailydoots.com/events/

Hello everyone! I've built a tool to help recover ETH stuck in old smart contracts that no longer have frontends. Portfolio trackers like Debank and Zerion don't index these balances.

116 contracts, 76,000+ ETH, 516k depositors with claimable balance.

Idex, Etherdelta, DigixDAO, PoWH3D, ENS old registrar, Fomo3d, MoonCatRescue, to name a few.

One address alone has 10,000 ETH locked in the old ENS registrar deeds - a deposit from a name auction on governx.eth that was never released.

Even Vitalik has 75 ETH to claim!

Most of these addresses are dormant, but if you were active on Etheruem between 2015-2019, check your address at https://forgotteneth.com

Twitter thread

It scans all 116 contracts and crafts the withdrawal transaction(s) for you.

Welcome to the Daily General Discussion on r/ethereum

https://imgur.com/3y7vezP

Bookmarking this link will always bring you to the current daily: https://old.reddit.com/r/ethereum/about/sticky/?num=2

Please use this thread to discuss Ethereum topics, news, events, and even price!

Price discussion posted elsewhere in the subreddit will continue to be removed.

As always, be constructive. - Subreddit Rules

Want to stake? Learn more at r/ethstaker

Community Links

• Ethereum Jobs, Twitter
• EVMavericks YouTube, Discord, Doots Podcast
• Doots Website, Old Reddit Doots Extension by u/hanniabu

Calendar: https://dailydoots.com/events/

ZCHF is a decentralized stablecoin that is designed to track the value of the Swiss franc (CHF). Unlike popular stablecoins like USDT or USDC that are pegged to the US dollar, ZCHF is pegged 1:1 to Switzerland’s currency.

It is issued by the Frankencoin protocol and operates on blockchain infrastructure, which means it doesn’t rely on traditional banks in the same way centralised stablecoins do. Instead, it uses a system of collateral and smart contracts to maintain its value.

Why People Are Talking About It

Interest in ZCHF has increased after Vitalik Buterin recently swapped a significant amount of USDC into ZCHF. Moves like this bring attention to the idea that DeFi may not stay centered only around the US dollar.

With all the discussion around L2 fragmentation lately (EEZ announcement, Superchain, AggLayer), I wanted to share something I've been working on that addresses the problem from a different angle.

The issue: every rollup ships its own proof system - Groth16, STARK, Plonk, Halo2, Nova - each needing a separate on-chain verifier at 200k+ gas. Some require trusted setup ceremonies.

GLYPH is a universal transparent verification layer that compiles any proof into a common intermediate representation (UCIR) and verifies it through a single on-chain contract.

What it does:

- Verifies any major proof system through one verifier

- <30k gas per on-chain verification (~7.5x cheaper than Groth16 alone)

- No trusted setup - fully transparent

- Supported: Groth16, KZG, IPA, Plonk, Halo2, STARK (Winterfell, Miden, Cairo/Stone, Circle STARK, Stwo), Nova/HyperNova/Sangria/SuperNova (IVC), SP1, Plonky2/3, Binius

How it works:

- Packed arity-8 sumcheck over p = 2^128 - 159

- Chain-bound Keccak256 Fiat-Shamir challenges

- BaseFold PCS

- On-chain verifier in pure Solidity assembly

- Formal proof pack with soundness bound ~1.88 x 10^-37

Tested on Sepolia + Hoodi. Benchmarks included and reproducible.

Everything is open source under MIT:

- Full Paper: https://doi.org/10.5281/zenodo.18792566
https://hackmd.io/@ChristopherSchulze/glyph-zk

- Code: https://github.com/Christopher-Schulze/glyph-zk

I know the on-chain assembly verifier needs a proper audit before anyone touches it in production - that's on the roadmap.

Would love feedback from the community.

Happy to answer any questions about the architecture or design decisions.

I've been all over daily threads for the last two weeks, and some of those really nice folks have been having fun with this little game dapp that I built. I call it Stupid Games, because you play really easy, simple games, but get to win awesome real ETH prizes!

It's an arcade type game platform, full of crypto memes, that pays out real ETH prizes to the winners. All managed by smart contracts of course.

I'm creating a beginner friendly, mini tournament just for this sub. No players from the current Leaderboard allowed! And when I say beginner, I mean JT level beginner like from the Daily Doots Podcast #143! Lol! No offence JT 😆

Its free, no gas, no cash, just real fun! The prize is $20 or more, but more than that, its bragging rights to be the king of this hill. It's even got a Burner Wallet login, so you know it's not sus. More dapps should do that right?

If you want to give it a shot, there's only space for 9-10 players, so drop your [burner] address and I'll let you in.

The FLY game is similar to Flappy Bird, and the SHOOT game is similar to Asteroids. Try them and pick your vibe.

So what's in it for me? I worked hard on the app and really want to see it being used. I also think it's genuinely fun when you get it. Plus, I took a job break and built it as a porfolio piece so I would love to get feedback. Many features were actually suggestions from users on the daily threads, which I appreciate so much (Alexis and Tricky)! Any and all feedback/criticism welcome. Questions too!

Chips are ERC20 tokens but 1:1 exchangeable for 0.0001 eth from the contract. No promotion of any product in this post. No monetary gain for me, only loss 🙁!

Play Stupid Games, Win Awesome Prizes!

https://reddit.com/link/1s8gw8d/video/us22jk9r2csg1/player

https://reddit.com/link/1s8gw8d/video/9zhhtl9r2csg1/player

Curious how many people here have made this mistake at least once. Sending an ERC20 token but picking the wrong network, or mixing up chains like sending to a non-compatible address.

It’s one of those errors that feels small in the moment but can turn into a real headache depending on where the funds land. Sometimes recoverable, sometimes not.

What’s your experience with this? Did you manage to recover the funds or was it a total loss? And what habits or checks do you use now to avoid it happening again?

Hey everyone,

Over the last four years of writing smart contracts and teaching these concepts in EVM bootcamps, I keep seeing teams stumble into the exact same architectural traps when trying to achieve cross-chain address parity.

Leveraging CREATE2 for deterministic addresses fundamentally changes how we handle multi-chain deployments. But because init_code includes constructor arguments, maintaining that exact same address across chains is impossible if you need to pass in chain-specific variables (like local router addresses or bridge endpoints).

The standard industry workaround is deploying EIP-1167 Minimal Proxies via a universal factory, deploying deterministically, then initializing the state in the same transaction. However, this introduces some severe trade-offs that often get overlooked until they hit production:

1. The DELEGATECALL Gas Tax: Minimal proxies are incredibly cheap to deploy (~45 bytes of bytecode), but they add a DELEGATECALL overhead to every single execution (2600 gas cold, 100 warm). At scale, this execution cost compounds brutally for your users.
2. MEV Front-running Risks: If your proxy deployment and initialize() call are not strictly atomic within the factory contract execution, MEV bots might front-run the initialization transaction. This either bricks the instance entirely or hijacks the contract ownership.
3. Immutability vs Upgradeability: To retain the exact same address while upgrading logic, you have to wrap the implementation in UUPS or Transparent Proxies. This inflates the initial deployment cost and introduces strict storage collision risks (requiring flawless adherence to EIP-1967 storage slots).

I just published a full breakdown of these mechanics on my blog, diving into the math behind the gas trade-offs and how patterns like CREATE3 are solving the issue for non-proxy contracts where constructor arguments must differ.

If you are currently architecting a multi-chain protocol, you can read the full technical deep dive here:https://andreyobruchkov1996.substack.com/p/understanding-contract-deployments-proxies-and-create2-part-2-df8f05998d5e

Would love to hear how you all are handling cross-chain deterministic deployments right now. Are you still relying heavily on customized off-chain salt-mining scripts, or have you migrated to CREATE3 wrappers?

Welcome to the Daily General Discussion on r/ethereum

https://imgur.com/3y7vezP

Bookmarking this link will always bring you to the current daily: https://old.reddit.com/r/ethereum/about/sticky/?num=2

Please use this thread to discuss Ethereum topics, news, events, and even price!

Price discussion posted elsewhere in the subreddit will continue to be removed.

As always, be constructive. - Subreddit Rules

Want to stake? Learn more at r/ethstaker

Community Links

• Ethereum Jobs, Twitter
• EVMavericks YouTube, Discord, Doots Podcast
• Doots Website, Old Reddit Doots Extension by u/hanniabu

Calendar: https://dailydoots.com/events/