Claire Mc Cafferty

Head of APAC, Engineering & Strategic Growth at Tangem |🚀
Product Builder on Flare Ecosystem 🛠️ , GTM & Partnerships

[Claire Mc Cafferty @mcclaireonchain]

Native $XCN, secured offline. @onyx

Onyx Mainnet is live in Tangem. Receive, hold and send XCN on its own chain, with your private keys never leaving your card or ring.

Available in the latest app version.

[Claire Mc Cafferty @mcclaireonchain]

@Ken3tqoj I sent you a messsge on what to do. Kindly check your inbox 🫡

[Claire Mc Cafferty @mcclaireonchain]

@Ken3tqoj Are you on the latest app version ? make sure you airgap to prevent any compromise or attack.

[Claire Mc Cafferty @mcclaireonchain]

@JamesKendr8470 check your inbox 👋

[Claire Mc Cafferty @mcclaireonchain]

We’re really sorry this happened. We understand how serious this is, especially when the funds were needed for essentials.
Did you verify the destination address against your saved Coinbase address before confirming?

[Ivy @21DogeLoge42]

@mishaboar on Tangem app yesterday I chose last address sent to last 5 times (my coinbase wallet) and it went to some scammer with over 100k in their wallet. I needed to pay my phone bill & buy groceries. I'm so over it.

[Claire Mc Cafferty @mcclaireonchain]

@JamesKendr8470 shoot me a follow back 😊

[Claire Mc Cafferty @mcclaireonchain]

You could use a Tangem Ring instead of a card, so you don’t have to remove your phone cover every time. It works via NFC with compatible phones. Just check Samsung compatibility before ordering. 😊

[Craig @JamesKendr8470]

@Tangem Hey question, I changed from iPhone to Samsung and accessing my wallet on my Samsung is a PITA because I use one of those radiation blocker covers which I have to remove in order to use my card. Is there anything a little more user friendly and less pita? Thanks

[Claire Mc Cafferty @mcclaireonchain]

@ericdean_ai Kindly shoot me a follow and send me a message so I can investigate this further

[Claire Mc Cafferty @mcclaireonchain]

Check whether CRCL has transfer restrictions or whether SafePal lacks a supported route from Arc to Ethereum. Don’t keep retrying Can you share the CRCL contract address and the full error message? That will help identify whether this is a token restriction or a SafePal routing issue.

[Eric Dean @ericdean_ai]

@Longdotsupply @arc I’m using SafePal to buy and sell CRCL, but neither buying nor selling works. I keep getting error code 1033. It seems that the smart contract restricts trading. Why? I can't swap my CRCL on arc to ERC20.

[Claire Mc Cafferty @mcclaireonchain]

How many wallets have you added?

[Funjunkman @SourdoughF88856]

@minehood_rh How about you get rid of the waiting period if we have to add other wallets. I click approve and it does nothing but tell me on the next page I must wait for the 48 hours.

[Claire Mc Cafferty @mcclaireonchain]

How long ago did you deposit?

[Stern John @SternJohn2]

@cryptocom Sol deposit taking longer than usual.. please fix.. thank you...

[Claire Mc Cafferty @mcclaireonchain]

You need to migrate those SPRK into FLR manually using the Flare mainnet portal, if your holdings are eligible. Are you using a compatible wallet?

[Digital Wealth Advisor @cryptowealth589]

I held my XRP on the day of the snapshot, then I was credited with my Spark tokens. Then AFTER the snapshot I removed my XRP. I have claim numbers, all documentation, screen shot of Spark tokens. Stretto informed me via email that Flare never delivered the Flare (per the Court order) by Judge Glenn. January 24, 2023. This notice was from Celsius Distribution on 10/6/2026.

[Claire Mc Cafferty @mcclaireonchain]

That sounds frustrating, especially with your claim records and screenshots. When did you receive that email, and has Stretto provided any further update on your FLR claim?

[Digital Wealth Advisor @cryptowealth589]

I held my XRP on the day of the snapshot, then I was credited with my Spark tokens. Then AFTER the snapshot I removed my XRP. I have claim numbers, all documentation, screen shot of Spark tokens. Stretto informed me via email that Flare never delivered the Flare (per the Court order) by Judge Glenn. January 24, 2023. This notice was from Celsius Distribution on 10/6/2026.

[Claire Mc Cafferty @mcclaireonchain]

Are you saying the card sets or ring version ?

[Crypfu @thecrypfu]

@peanutt @0xdecapitator @Albertfd1999 @SupportJburn @LexDoomArt @jacobyboyer_ @savages__111 @DedGorgez @Tangem I got a tangem, I should ahve sent the important things over sooner, and I forgot. Or put it off. Either way, lesson learned.

I appreciate you homie, I do have the new wallet set up, I'll shoot it over in DM

[Claire Mc Cafferty @mcclaireonchain]

Sounds like a productive Sunday! 😊 The 3-card set is a sensible choice for redundancy. Just read up on seed phrase vs. seedless setup, backup security and recovery before ordering. Understanding those choices is key to self-custody.

[🇩🇪𝐉𝐨𝐡𝐧 𝐈𝐦𝐩𝐮𝐝𝐞𝐧𝐭🇩🇪 @JohnImpudent]

@Tangem Well, this ist going to be my sundays Work ... Gonna read all about tangem and If i Like what i read i'll Order the Triple Set ... Seems to be a good Wallet decision ...

[Claire Mc Cafferty @mcclaireonchain]

Yes, but compatibility depends on which Tangem card you have.
If you’re buying specifically for XRP and XRPL features, get the Xaman-branded cards.

[Mark Singer @MarkSin84901438]

@WietseWind @john_rixy @XamanWallet Can you use the tangem card for Xaman wallet?

[Claire Mc Cafferty @mcclaireonchain]

On ZebPay, the 1.25 XRP withdrawal charge is an exchange fee, not the XRPL network fee. A hardware wallet doesn't need a destination tag when receiving XRP directly; leave it blank if ZebPay allows it.

[SKP 🤖 @lambdabeta2025]

‼️I am not able to buy XRP via Tangem using Indian debit card. Has anyone able to buy from Tangem directly? Also, Zebpay charges 1.25 XRP for transfer which usually should be 0.001 XRP. And it asks for destination tag which hardware wallet will not have.

[Claire Mc Cafferty @mcclaireonchain]

Yes, but your security depends on how you set it up. With Tangem, your seed phrase is converted into a private key stored securely inside the card’s chip.

[zoka @0xzoka_]

@0xfaseeh @Tangem so in tangem my seed phrase is safe?

[Claire Mc Cafferty @mcclaireonchain]

Yes, Tangem handles approvals within the swap flow, which is why you may not see a separate approval screen.

the default is approval for the exact swap amount, not unlimited access. Unlimited allowance is optional and must be selected in provider settings.

If you use unlimited approval, a compromised contract could potentially spend the approved token balance until that allowance is revoked.

[ra1ny @suisuizone]

@Tangem Why doesn’t Tangem ask for a signature or token approval when swapping? Is this safe?

I’ve noticed something strange when using the Swap feature inside the Tangem app.

Whenever I swap tokens, I don’t see any separate signature request or token approval (Approve) step. The swap just goes through without showing me any explicit smart contract authorization.

This makes me a bit concerned about security.

Does Tangem automatically handle token approvals in the background? If so, does it grant unlimited allowances or only approve the exact amount being swapped?

My biggest concern is what happens if the swap provider’s smart contract gets compromised in the future. Could an attacker drain tokens from my wallet because of previous swaps?

Has anyone looked into how Tangem handles smart contract approvals? I’d really appreciate some clarification.

[Claire Mc Cafferty @mcclaireonchain]

Yes. You can swap XLM to USDC directly in the Tangem app, provided a supported swap route is available.
You can then keep USDC in your Tangem wallet until you're ready to send it to an exchange. No need to transfer it immediately.

[BrianXRP @snelson_brian]

@Tangem Can you swap xlm to usdc in Tangam app. Then send directly to exchange? Or even just keep it in usdc on Tangam until I decide to send it to exchange?

[Claire Mc Cafferty @mcclaireonchain]

Yes, Tangem supports USDT storage across several networks. You can also use Tangem Pay’s Visa card to spend supported crypto. Just remember, wallet storage and card payments are separate services.

[Jay @gtraaa_]

@Tangem is it possible to save my usdt ?
also can i use the device just like a bank account card ?