fedimint_client::client::builder

Enum RootSecret

Source 
pub enum RootSecret {
    StandardDoubleDerive(DerivableSecret),
    Custom(DerivableSecret),
}
Expand description

The type of root secret hashing

Please read this documentation carefully if, especially if you’re upgrading downstream Fedimint client application.

Internally, client will always hash-in federation id to the root secret provided to the ClientBuilder, to ensure a different actual root secret is used for ever federation. This makes reusing a single root secret for different federations in a multi-federation client, perfectly fine, and frees the client from worrying about FederationId.

However, in the past Fedimint applications (including fedimint-cli) were doing the hashing-in of FederationId outside of fedimint-client as well, which lead to effectively doing it twice, and pushed downloading of the client config on join to application code, a sub-optimal API, especially after joining federation needed to handle even more functionality.

To keep the interoperability of the seed phrases this double-derivation is preserved, due to other architectural reason, fedimint-client will now do the outer-derivation internally as well.

Variants§

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StandardDoubleDerive(DerivableSecret)

Derive an extra round of federation-id to the secret, like Fedimint applications were doing manually in the past.

Note: Applications MUST NOT do the derivation themselves anymore.

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Custom(DerivableSecret)

No double derivation

This is useful for applications that for whatever reason do the double-derivation externally, or use a custom scheme.

Implementations§

Trait Implementations§

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impl Clone for RootSecret

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fn clone(&self) -> RootSecret

Returns a duplicate of the value. Read more
1.0.0 · Source§

fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source. Read more

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