Can you sell a crypto wallet?

Why a seed phrase can't be sold

A normal wallet is a secret: a seed phrase or a private key. Whoever knows it controls the coins. There is no owner field to change.

So selling a wallet means telling the buyer the secret. You can't un-tell it. A copy may sit on paper, in a notes app or in a backup. The buyer has no way to know you kept none.

The usual advice is to skip the sale. Make a new wallet and move the coins across. That sells coins, not a wallet, and the addresses change.

The second hole: signatures already made

A seed phrase is not the only secret. A signature can move coins too. A signed transaction is just bytes, and anyone who holds it can broadcast it later.

Say a seller signs a transaction that sends every coin to their own address, and never sends it. They sell the wallet. After the sale they broadcast it, and the coins are gone.

This hole stays open even if keys can't be copied. Any honest sale has to rule it out. Clean history is Satchel's answer.

What a safe sale needs

Three conditions close both holes.

• No copy of the key. The seller must not be able to sign once the sale is done.
• A readable record. The buyer must see every signature the wallet ever made, including requests that timed out.
• One step. The buyer pays and receives the wallet in the same transaction, so neither side sends first.

No ordinary wallet meets all three. We know of no other NFT-wallet design that provides the second.

Ways to sell a wallet, compared

Here is how the common routes stack up against those conditions.

The first two rows are the common ones. Both leave the buyer trusting the seller.

How a Satchel sale works

Selling happens on Satchel's own market. Each step has a reason.

1. The seller waits out the quiet period. A Satchel can be listed only after 250 blocks, about 2 min 20 s, without a new signature.
2. The seller lists it at a fixed price in NEAR.
3. While it's for sale, the Satchel is paused. It can't sign, and only a purchase or an accepted offer can move it.
4. The buyer opens the sale page. Their browser reads every record and checks each signature on its own chain.
5. Buy turns on only when no old signature can still move the coins.
6. The buyer buys. One NEAR transaction moves the Satchel to the buyer and pays the seller.

The purchase names the listing and the signature count the browser checked. If either changed, it fails and refunds.

The buyer's browser runs the check, not the contract. A NEAR contract can't see Bitcoin, Ethereum or Solana. Read what the check does and doesn't cover on the clean history page.

Nobody can change the rules under you. The contract has no admin key and no upgrade method, not even for Satchel's makers.

What the seller gives up and gets

The seller is paid in NEAR in the same transaction. If the payout fails, the buyer still gets the Satchel and the money waits as proceeds on your Satchels page.

Everything inside goes to the buyer: the coins on every supported chain, the NEAR held inside, the addresses and the signature record. Any spending allowance the seller granted is cleared.

Satchel charges no fee today. Giving a Satchel away works the same way without a price: see how to give a crypto wallet. Buyers can read the checklist in buying a crypto wallet.

What this does not solve

A Satchel sale removes two holes. It does not remove every risk from a sale.

• The buyer still trusts NEAR's signer network, which makes every signature. Satchel is new and hasn't been audited.
• The check covers past signatures. It can't cover signatures made after you buy.
• Only Satchel's own market lists Satchels. Other NEAR marketplaces can't list one yet.
• Satchel gives no tax or legal advice. Rules on selling crypto differ by country, so check yours.

Questions and answers