createConsumer abstract method
Creates a StreamConsumer for generating a signature from a stream.
The returned SignatureConsumer is basically a typed StreamConsumer,
that wraps the signature streaming APIs. Creating the consumer will call
crypto_sign_init, adding messages to it via SignatureConsumer.addStream
will call crypto_sign_update for every event in the stream. After you are
done adding messages, you can SignatureConsumer.close it, which will
call crypto_sign_final_create internally and return the signature of the
data created from secretKey.
For simpler usage, if you only have a single input Stream and simply want to get the signature from it, you ca use stream instead.
See https://libsodium.gitbook.io/doc/public-key_cryptography/public-key_signatures#multi-part-messages
Implementation
SignatureConsumer createConsumer({
required SecureKey secretKey,
});