arculus + STON.fi via WalletConnect is the hardware wallet setup TON defi actually needed DeFi lost over $2.8 billion to hacks and compromised wallets in 2arculus + STON.fi via WalletConnect is the hardware wallet setup TON defi actually needed DeFi lost over $2.8 billion to hacks and compromised wallets in 2

your private keys shouldn’t live on a server somewhere

2026/04/09 13:48
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arculus + STON.fi via WalletConnect is the hardware wallet setup TON defi actually needed

DeFi lost over $2.8 billion to hacks and compromised wallets in 2024. the shocking part isn’t the number. it’s that most of those losses came from hot wallets: browser extensions, phone apps, anything connected to the internet around the clock

you trade on a DEX to skip custodial risk. then you store your keys in a browser extension. strange place to draw the line

the cold storage gap nobody talks about

hardware wallets solved this for bitcoin holders a decade ago. sign offline, key never touches the internet, phishing site gets nothing useful

defi traders mostly skipped that lesson. hardware wallets felt too clunky for active trading. plug in a device, navigate firmware menus, confirm on a tiny screen. fine for long-term storage. painful for swapping tokens twice a week

so traders kept keys hot and hoped for the best.

arculus approached this differently. the wallet lives on a metal card with an embedded secure element chip. no USB, no bluetooth, no persistent connection. you authenticate with a PIN and tap the card to your phone via NFC. three factors: something you have (the card), something you know (the PIN), something you are (card must physically touch your device)

that third factor is the one that matters for trading. a remote attacker who steals your seed phrase still can’t sign a transaction without the physical card in hand

TON needed a bridge

TON’s defi ecosystem grew fast through 2024 and 2025. STON.fi handles hundreds of millions in monthly volume. the network’s throughput and fee structure are competitive with any L2 out there

the bottleneck wasn’t liquidity. users who cared about security couldn’t connect hardware wallets to TON-based dapps. the tooling wasn’t there

WalletConnect fixed that. the protocol, already proven on EVM chains, extended support to TON. arculus added WalletConnect integration. two things that existed separately plugged together, and suddenly you could connect a metal card in your pocket to a TON DEX without sacrificing either security or usability

how it actually works

  • open STON.fi on browser or phone
  • choose WalletConnect instead of a hot wallet
  • scan the QR code with the arculus app
  • your phone pairs with the dapp session

when you confirm a swap, STON.fi sends an unsigned transaction to arculus. you tap the card to the back of your phone. the secure element signs it offline. signed transaction goes to the network.

your private key moved through zero internet-connected systems. the browser saw a session handshake and a signed transaction, nothing else.

the STON.fi guide walks through the full pairing steps if you want to read it before your first session. worth 5 minutes.

why this matters beyond your own wallet

TON has a large base of users who came in through telegram, explored crypto through TON-native apps, and now sit on real balances they want to put to work. a lot of them haven’t touched defi because the security model felt opaque.

hardware wallet support via WalletConnect lowers that entry point. the security model becomes physical and visible: card in pocket, tap to sign. users who were uneasy about browser extensions now have an option that maps to how they already think about security.

omniston, STON.fi’s aggregation protocol, pulls liquidity across TON. more users entering with better security habits means deeper liquidity and fewer protocol-level meltdowns when individual wallets get drained.

updates on integrations like this land in the STON.fi telegram channel as they roll out.

one practical note

arculus cards are $99. if the price was making you hesitate, the code TON20 knocks $20 off. just useful to know

the real cost is the mental model shift: from “my wallet is an app” to “my wallet is an object.” that one’s free, and it’s the shift that actually changes your risk profile

learn more on Arculus


your private keys shouldn’t live on a server somewhere was originally published in Coinmonks on Medium, where people are continuing the conversation by highlighting and responding to this story.

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