Struct monero_wallet::send::TransactionSignMachine

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pub struct TransactionSignMachine { /* private fields */ }
Available on crate feature multisig only.
Expand description

Second FROST machine to produce a signed transaction.

Trait Implementations§

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impl SignMachine<Transaction> for TransactionSignMachine

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type Params = ()

Params used to instantiate this machine which can be used to rebuild from a cache.
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type Keys = ThresholdKeys<Ed25519>

Keys used for signing operations.
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type Preprocess = Vec<Preprocess<Ed25519, ClsagAddendum>>

Preprocess message for this machine.
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type SignatureShare = Vec<SignatureShare<Ed25519>>

SignatureShare message for this machine.
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type SignatureMachine = TransactionSignatureMachine

SignatureMachine this SignMachine turns into.
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fn cache(self) -> CachedPreprocess

Cache this preprocess for usage later. This cached preprocess MUST only be used once. Reuse of it enables recovery of your private key share. Third-party recovery of a cached preprocess also enables recovery of your private key share, so this MUST be treated with the same security as your private key share.
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fn from_cache( (): (), _: ThresholdKeys<Ed25519>, _: CachedPreprocess, ) -> (Self, Self::Preprocess)

Create a sign machine from a cached preprocess. After this, the preprocess must be deleted so it’s never reused. Any reuse will presumably cause the signer to leak their secret share.
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fn read_preprocess<R: Read>(&self, reader: &mut R) -> Result<Self::Preprocess>

Read a Preprocess message. Despite taking self, this does not save the preprocess. It must be externally cached and passed into sign.
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fn sign( self, commitments: HashMap<Participant, Self::Preprocess>, msg: &[u8], ) -> Result<(TransactionSignatureMachine, Self::SignatureShare), FrostError>

Sign a message. Takes in the participants’ preprocess messages. Returns the signature share to be broadcast to all participants, over an authenticated channel. The parties who participate here will become the signing set for this session.

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