Glossary
Terms that appear in the documentation and in the interface. If a word came up in the text and did not make sense, it is probably here.
Wallets and Access
Private key
A secret string of the form 0x... that gives full control over one address. Whoever knows the key controls the funds. It cannot be recovered or changed.
Seed phrase (mnemonic)
A set of 12 or 24 words that private keys are derived from, usually for many addresses at once. If a seed phrase leaks, every address derived from it is compromised, not just one.
Compromised wallet
A wallet whose private key or seed phrase may have reached someone else. Such a wallet must never be used again, even after the assets are moved out.
Drainer
Software that automatically moves funds out of a wallet it has access to. It works faster than a person and reacts to anything that arrives.
Recipient
The address the rescued assets will arrive at. It must be new and derived from a different seed phrase — see Before You Start.
Donor wallet
A separate clean wallet that pays only for gas. It exists because topping up a compromised wallet is not an option.
Networks and Transactions
Network
A separate blockchain: Ethereum, BNB Chain, Polygon and others. Assets do not move between networks by themselves, and a rescue happens on the network that holds them.
chain ID
The numeric identifier of a network. The site compares it against the RPC's answer: if they disagree, the selected network and the actual connection are different, and no transaction should be sent.
RPC
The node the site reads network data through and sends transactions to. Different RPCs answer differently and restrict browser requests differently.
Gas
The network's charge for executing a transaction. It is paid only in the native coin.
Native token
The network's main coin, used to pay gas: ETH, BNB, POL and similar. Tokens like USDT cannot pay for gas.
Nonce
A per-address transaction counter. Each transaction has to follow in order, which is why sending another one on top of a stuck transaction and hoping for the best does not work.
Simulation
A trial run of the transaction without sending it: the site shows what would happen and what it would cost. A successful simulation lowers the risk but is not a guarantee — network state can change.
Transaction plan
The assembled set of data to be sent. It is valid for five minutes: gas prices and balances go stale in that time, so an expired plan has to be rebuilt.
Broadcast
The moment a signed transaction goes out to the network. After broadcast it cannot be cancelled, only awaited.
Tx hash
The identifier of a sent transaction. It is what you use to find the transaction in an explorer and see what happened to it.
Explorer
A site for viewing transactions and balances on a specific network — Etherscan for Ethereum, BscScan for BNB Chain, and so on. Each network has its own.
Tokens and Permissions
ERC-20
The standard for ordinary tokens: USDT, USDC and most others. Tokens of this standard move through a contract call rather than like the native coin.
ERC-721 and ERC-1155
NFT standards. ERC-721 is a unique item; ERC-1155 is an item that can exist in several copies. The standard affects how the fee is calculated.
Approve and allowance
approve is the permission you grant a contract to spend your tokens. The allowance is how much it may spend. The permission stays valid until it is revoked, which is why access granted once remains with a malicious contract.
Permit
A way to authorise a token transfer with a signature, without a separate approve transaction. It only works with tokens that support it.
EIP-7702 delegation
A mechanism that makes an ordinary wallet execute code at a given address. Useful in itself, but a delegation signed over to an attacker lets them drive the wallet's transactions. It is cleared by the Remove Delegation action.
AntiDrain Terms
Bundler
An internal AntiDrain route that packs several transfers into one transaction through the rescue contract. This is not an ERC-4337 bundler; it is the name of a route in the interface.
Pool exit
Withdrawing funds from a DeFi position — a liquidity pool or a lending protocol, for example — rather than a plain token transfer from an address.
Calldata
Contract call data in hex form. It is only needed in the custom transaction mode: if you do not know what it contains, do not use that mode.
Fee unit
How some actions are priced: one unit equals $5, and the site converts that into the native coin at the current price. It is used where a percentage of the amount makes no sense — an NFT transfer, for example.
Balance at execution
A mode where the transfer amount comes from the actual balance at the moment the transaction runs, rather than from a number you typed. Useful when the balance may change before sending.
Next
- How Your Wallet Was Compromised — what happened and why.
- FAQ — short answers to common questions.
- Troubleshooting — if something is not working.