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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 doesn’t operate its own privacy protocol. Instead, it aggregates across the leading privacy primitives on Solana and picks the best route for each transaction.

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The protocols

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Privacy Cash

A ZK UTXO mixer. Funds are deposited into a pool, and recipients withdraw with a zero-knowledge proof — breaking the on-chain link between sender and receiver.
  • Fee: ~$0.71 + 0.35% of the amount
  • Best for: Universal fallback. Works for any recipient address.

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MagicBlock

A TEE-based privacy protocol (Intel TDX) that processes transactions confidentially in a secure enclave. Recipients land in their mainnet token account directly, no unlock step needed.
  • Fee: Gas only (~free)
  • Best for: Most sends, when the recipient hasn’t enabled Umbra. Cheapest option.

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Umbra

A ZK shielded pool secured by Arcium MPC. Funds enter the shielded pool and are claimed by registered recipients. Both sender and recipient must be registered on Umbra.
  • Fee: 0.7% of the amount (charged on claim)
  • Best for: Sends between two Umbra-registered users.
You can enable Umbra in your profile under the Umbra section — it’s a one-time, ~$0.60 setup.

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How Auto routing works

When the picker is set to Auto (the default), Swish picks the route in this order:
  1. Umbra — if sender and recipient are both registered
  2. MagicBlock — if MagicBlock is available
  3. Privacy Cash — final fallback
If a route fails at dispatch (e.g., MagicBlock has an outage), Swish automatically retries via the next protocol.

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Picking manually

The picker on every send / request / Send via Claim flow lets you override Auto and pick a specific protocol. Disabled options are dimmed — typically because the recipient isn’t compatible (e.g., not registered on Umbra).

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Send via Claim

Send via Claim only routes through MagicBlock or Privacy Cash today. Umbra requires recipient registration, which doesn’t fit the open-claim model.