A problem people bring · solved
I'm scared of wallet drainers
You can see in plain words what any site will make you sign before you sign it: scan the request with Recon. For savings, add Second Signature as an AI cosigner on a Safe, so money only moves when it agrees. Check and revoke old approvals with Revoke.cash.
- 3 stops
- 28 minutes, all in
- 4 surprises
- 1 live demo
Chapter 1
Who knew?
A second signer can refuse a drain even if a scammer tricks you.
Most drains come from approvals, not sending.
A gasless 'signature only' request can be the most dangerous one, because it may be a Permit that hands over your tokens.
Revoking old approvals is free to check and costs only a little gas on each network.
Only experts can avoid drainers.
Recon is about 0.1 USDT per scan; Second Signature costs gas on Monad. Checking approvals is free and revoking costs a little gas.
Chapter 2
The free route, step by step
3 stops, cheapest first
Three ways through
Pick your route
- Start free tonight
Read before you sign, clean old approvals
Built by the HouseRabby simulates each request and Revoke.cash lists every live allowance across chains.
Cost Free to check; revoking costs a little gas.
- The bold play
Put savings behind a second signer
Built by the HouseA Safe or Squads vault plus an AI cosigner refuses a drain even if a scammer tricks you.
- Share a family wallet that needs two of three to move money
- Keep a wallet that argues back before you sign
Cost Gas to set up; Recon is about 0.1 USDT per scan.
- Build it
Build the weekly approvals cleaner
Built by the HouseNobody sends ordinary users a plain weekly list of what can still drain them. The House will build it with you.
- Own a working onchain app with your name on it
- Batch revoke unused approvals and send a weekly summary.
Cost Build time; approval data is public.
Your version
Make this mine
Tell the Engine where you stand and it re-routes this answer for you. Three free a day, shared with Ask the Engine. Engine Pro members get unlimited.
Past the basics
What’s possible
- Live today
Clean your approvals tonight.
How Connect to Revoke.cash. Revoke anything unlimited you do not use.
- Live today
Switch to a wallet that simulates every request.
How Install Rabby. Import a fresh wallet. Move savings later.
- Possible to build
A weekly email listing what can still drain you.
How Read approvals per address. Rank by risk. Link one-click revokes.
Project + project
Combos nobody marketed
- Rabby+Revoke.cash=
See risk before signing, then close what you approved months ago.
Why it works Most drains reuse old unlimited approvals.
- Kerberus+Phantom on Solana=
Scam sites get blocked before you connect.
Why it works Kerberus, formerly Pocket Universe, supports Solana as well as EVM.
- a Safe+Second Signature=
A second key that checks every transaction for you.
Why it works Drains need every signer to agree.
Chapter 3
Try it live
Built by the HouseDo not take our word for it. Second Signature runs right here, so you can poke at the real thing before you commit to anything.
Wallet or sign-in will not open in here? Open Second Signature in a new tab ↗
Screening Room
Watch it first
Chapter 4
Where it matters most
- airdrop hunters
They connect to many new sites.
- new users in Southeast Asia
Fake airdrop links spread through Telegram.
- NFT collectors
Fake mint pages ask for broad approvals.
Chapter 5 · Not built yet?
Build it
A weekly approvals cleaner that revokes unused spending rights across chains in one batch.
Who could build it Active wallet users, and wallets that want to offer it as a feature.
For founders
Uses you never marketed
Connections
People to meet
- Revoke.cash
Ask which approvals matter most on your chain.
- Rabby
Learn what each warning means.
- Safe
Ask about guards and spending limits.
Propose a bridgetwo projects, one outcome neither could reach alone
Questions
What is a wallet drainer?
A wallet drainer is a malicious site that tricks you into signing away your tokens, often with an approval or Permit.
Can I get my crypto back after a drainer?
Usually not, so scanning with Recon before signing matters more than anything after.
What should I do right away after a bad signature?
Revoke approvals with Revoke.cash and move what is left to a new wallet.
Is a hardware wallet enough to stop drainers?
A hardware wallet helps, but you can still sign a bad request, so pair it with Recon or a Safe.
Which wallet do you use for new sites, and how much would you keep in it if savings lived somewhere else?
Some links are referral links; they never change what we recommend.