pub trait NonceSequence {
// Required method
fn advance(&mut self) -> Result<Nonce, Unspecified>;
}Expand description
A sequences of unique nonces.
A given NonceSequence must never return the same Nonce twice from
advance().
A simple counter is a reasonable (but probably not ideal) NonceSequence.
Intentionally not Clone or Copy since cloning would allow duplication
of the sequence.
Required Methods§
Sourcefn advance(&mut self) -> Result<Nonce, Unspecified>
fn advance(&mut self) -> Result<Nonce, Unspecified>
Returns the next nonce in the sequence.
§Errors
error::Unspecified if “too many” nonces have been requested, where how many
is too many is up to the implementation of NonceSequence. An
implementation may that enforce a maximum number of records are
sent/received under a key this way. Once advance() fails, it must
fail for all subsequent calls.