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Documentation Index

Fetch the complete documentation index at: https://docs.swish.cash/llms.txt

Use this file to discover all available pages before exploring further.

Swish is built for private payments. Here’s what that means and how it works.

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What’s private

When you use Swish to Send, Request, or Send via Claim:
  • Your wallet address is never linked to the recipient’s address on-chain
  • The connection between sender and receiver cannot be traced on the blockchain
  • The amount can also be hidden depending on the protocol used
An outside observer looking at the blockchain cannot determine who sent money to whom through Swish.

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How it works

Swish doesn’t operate its own privacy protocol. It aggregates across three privacy primitives on Solana — Privacy Cash, MagicBlock, and Umbra — and picks the best route automatically. Each protocol uses a different mechanism to break the on-chain link:
  • Privacy Cash — ZK UTXO mixer (deposit + withdraw breaks the link)
  • MagicBlock — confidential transactions inside an Intel TDX TEE
  • Umbra — ZK shielded pool secured by Arcium MPC
For full details on each protocol and how routing works, see Privacy Protocols.

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What’s not private

Not everything in Swish is private. Be aware of these exceptions:
ActionPrivacy level
SendPrivate — sender address hidden
RequestPrivate — requester address hidden
Send via ClaimPrivate — sender address hidden
WithdrawNot private — standard on-chain USDC transfer
DepositNot private — standard on-chain transfer to your address
Withdrawals and deposits are standard Solana transactions. Both addresses are visible on-chain. Use Withdraw only for moving funds to your own wallets.

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X (Twitter) handles

If you sign in with X, your handle is used within Swish to let others send you money by username. Senders don’t need your wallet address.

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Session signature

When you sign in, Swish asks you to sign a message. This signature is used locally to derive encryption keys for your private transactions. It is never sent to the blockchain and costs nothing.

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Best practices

  • Use Send, Request, or Send via Claim for private payments — avoid Withdraw when privacy matters
  • Enable Umbra in your profile if you want to receive funds with Umbra’s stronger privacy guarantees
  • Your embedded wallet (if you signed in with X) can be exported — keep your private key safe