contract.dev

🚨BREAKING: WE ASKED DEVS WHY TESTNETS SUCK!

@lifiprotocol @xStocksFi Any DeFi product now composing with xStocks through LI.FI is inheriting a new set of oracle and settlement dependencies. How those contracts behave under real market conditions pre-deploy is the part worth thinking about early

xStocks are live on LI.​FI! Tokenized equities and ETFs via @xStocksFi are now available for all 1000+ apps and wallets — powered by LI.​FI Intents. Access to tokenised real-world assets is now solved.

@arbitrum @Ostium @kaledora Perp DEXs with commodity and equity exposure live or die on how their risk models behave under real market conditions. That kind of contract logic needs serious pre-deploy stress testing exactly what we've been building at contract.dev

What makes @Ostium a premier venue for commodities and Nasdaq-powered equity perps? As @kaledora said: "it combines the benefits of onchain markets and traditional brokerage infrastructure in a decentralized, programmable, and verifiable system" Ostium is going programmable.

@maraoz The asymmetry is real and AI is making it worse. The only answer is raising the floor on pre-deploy rigor testing contracts under real mainnet conditions, not sanitized testnets. That's exactly what we've been building at contract.dev

PSA: I now consider *all* of DeFi unsafe. Coding agents are superhuman at finding vulnerabilities, and smart contract security is too asymmetric: defenders need to fix every bug while attackers need just one exploit to steal funds.

@arbitrum @oobit Big W for Oobit and Arbitrum. Programmable finance reaching 150M merchants is a number worth celebrating

Programmable finance only matters if it reaches the global economy. With @oobit on the Arbitrum Platform, users can now spend directly from their onchain balance at 150M+ Visa merchants worldwide. The programmable economy just hit retail.

Ethereum just hit a record: 8.7M smart contract deployments in a single quarter. More contracts than ever. Same broken testnets as always. If you’re shipping in 2026, test like it’s mainnet. Because eventually, it is. Contract.dev. Not a testnet. Not a fork. A production grade staging env for smart contracts.

. contract.dev isn’t just another dev tool. it’s a private, live copy of mainnet with contract dashboards, a simulation engine, and dev utilities built in. → stage contracts against real chain state. uniswap liquidity moves. chainlink feeds update. every protocol behaves exactly like production. → track TVL, fees, balances in auto-generated dashboards. every contract you deploy gets its own workspace. no dune. no custom tooling. → fire 10k txs at your contracts and see what breaks. simulations surface the bugs that only show up at scale yield drift, fee leaks, accounting errors. → impersonate any wallet. override oracle prices to simulate crashes. spin up chainlink upkeeps in one click. push to github, auto-deploy to your stagenet. sepolia is fake. anvil is frozen. forks drift the second you start them. not a testnet. not a fork. a production-grade staging env for smart contracts.

When you can test your project in real conditions before mainnet.

Any weekend plans? Me: Deploy. Simulate. Ship. Deploy. Simulate. Ship. Deploy. Simulate. Ship. Deploy. Simulate. Ship. Deploy. Simulate. Ship. Deploy. Simulate. Ship. Deploy. Simulate. Ship. Deploy. Simulate. Ship. Deploy. Simulate. Ship. Deploy. Simulate. Ship.

Fully testing a smart contract on a live mainnet fork in under 2 mins. Deploy, simulate 10k txs, check dashboards all on Contract.dev. The best part? No fake liquidity. No frozen blocks. Just real mainnet conditions.

Happy weekend guys This has been one of our best weeks so far.

@Oge2357 Dw us

Asking the real questions for the entire ecosystem The future of smart contract testing needs this level of honesty 🔥

congrats on the launch. multi-currency contract logic with live fx flows is one of the trickier things to validate before going live at contract.dev we give teams private testnets that follow real network state so contracts get tested in actual production conditions. could be useful as more teams start building on arc

Arc 🤝 @stablecorp QCAD, a Canadian dollar stablecoin issued by Stablecorp, is live on Arc Testnet and supported via StableFX. For developers and institutions, this unlocks: → CAD-denominated stablecoin rails alongside USDC → Direct onchain FX flows between CAD and USD → More efficient multi-currency applications → Real-world use cases across payments, treasury, and settlement QCAD on Arc lays the foundation for institutional-grade FX onchain. Arc is built for global, multi-currency finance.

After posting that video, we realised something. It wasn’t just these devs. 90% of Web3 devs feel the exact same way. That’s exactly why we built Contract.dev. A place where you can test your project like you’re already on Mainnet before you actually are. Here’s what you get: > Mainnet Replay: Uniswap, Chainlink, Curve all behave like production > Contract Workspaces: auto-generated dashboards tracking TVL, fees, balances, storage vars > Simulation Engine: fire 10k+ txs at your contracts, see what breaks at scale > Wallet Impersonation: test from any address, even Vitalik’s > Oracle Overrides: crash ETH to $1, test liquidations in real conditions > GitHub CI/CD: push code, auto-deploy, workspace s spin up instantly Sepolia is fake. Anvil is frozen. Forks drift. Contract.dev is the fix.

@Swagtimus What is just something that might help? Would love to talk in Dw

And we are live! Come ask us anything about building the Programmable Economy together at Open House London. x.com/i/spaces/1mxPa…

@anabelmtz86 @0x_beryl True if you want more details would love to have a great chat in dw

There's a moment every onchain dev dreads. Tests passed. Fork looked fine. Testnet worked. You deploy to mainnet and something breaks that you never saw coming. This isn't bad luck. It's a missing layer in the dev stack and that's what @contractdotdev is building🧵 👇

@kipupwidanshika I can feel the pain in the msg.

@contractdotdev Finally someone talked about it

🚨BREAKING: WE ASKED DEVS WHY TESTNETS SUCK!

@adityakrx Real conditions matter.🤝🫡

@contractdotdev Upgrade testnets

@cryptorboe Too real 🫡

@contractdotdev Testnets been gaslighting devs for years Finally someone calling it out!

@FrankPreye84748 🤝🚀

@contractdotdev Testnets are definitely moving with Great speed Lovely what it's building