Struct fedimint_core::core::OperationId

pub struct OperationId(pub [u8; 32]);

Unique identifier for one semantic, correlatable operation.

The concept of operations is used to avoid losing privacy while being as efficient as possible with regards to network requests.

For Fedimint transactions to be private users need to communicate with the federation using an anonymous communication network. If each API request was done in a way that it cannot be correlated to any other API request we would achieve privacy, but would reduce efficiency. E.g. on Tor we would need to open a new circuit for every request and open a new web socket connection.

Fortunately we do not need to do that to maintain privacy. Many API requests and transactions can be correlated by the federation anyway, in these cases it does not make any difference to re-use the same network connection. All requests, transactions, state machines that are connected from the federation’s point of view anyway are grouped together as one operation.

Choice of Operation ID

In cases where an operation is created by a new transaction that’s being submitted the transaction’s ID can be used as operation ID. If there is no transaction related to it, it should be generated randomly. Since it is a 256bit value collisions are impossible for all intents and purposes.

Tuple Fields

0: [u8; 32]

Implementations

impl OperationId

pub fn new_random() -> Self

Generate random OperationId

Trait Implementations

impl Clone for OperationId

fn clone(&self) -> OperationId

Returns a copy of the value.

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

Performs copy-assignment from source.

impl Debug for OperationId

fn fmt(&self, f: &mut Formatter<'_>) -> Result

Formats the value using the given formatter.

impl Decodable for OperationId

fn consensus_decode<D: Read>( d: &mut D, modules: &ModuleDecoderRegistry ) -> Result<Self, DecodeError>

Decode an object with a well-defined format

fn consensus_decode_hex( hex: &str, modules: &ModuleDecoderRegistry ) -> Result<Self, DecodeError>

Decode an object from hex

impl<'de> Deserialize<'de> for OperationId

fn deserialize<D>(deserializer: D) -> Result<Self, D::Error>where D: Deserializer<'de>,

Deserialize this value from the given Serde deserializer.

impl Display for OperationId

fn fmt(&self, f: &mut Formatter<'_>) -> Result

Formats the value using the given formatter.

impl Encodable for OperationId

fn consensus_encode<W: Write>(&self, writer: &mut W) -> Result<usize, Error>

Encode an object with a well-defined format. Returns the number of bytes written on success.

fn consensus_encode_to_vec(&self) -> Result<Vec<u8>, Error>

Self::consensus_encode to newly allocated Vec<u8>

fn consensus_encode_to_hex(&self) -> Result<String, Error>

fn consensus_hash<H>(&self) -> Hwhere H: Hash, H::Engine: Write,

Generate a SHA256 hash of the consensus encoding using the default hash engine for H.

impl FromStr for OperationId

type Err = Error

The associated error which can be returned from parsing.

fn from_str(s: &str) -> Result<Self, Self::Err>

Parses a string s to return a value of this type.

impl Hash for OperationId

fn hash<__H: Hasher>(&self, state: &mut __H)

Feeds this value into the given Hasher.

fn hash_slice<H>(data: &[Self], state: &mut H)where H: Hasher, Self: Sized,

Feeds a slice of this type into the given Hasher.

impl PartialEq for OperationId

fn eq(&self, other: &OperationId) -> bool

This method tests for self and other values to be equal, and is used by ==.

fn ne(&self, other: &Rhs) -> bool

This method tests for !=. The default implementation is almost always sufficient, and should not be overridden without very good reason.

impl Serialize for OperationId

fn serialize<S: Serializer>(&self, serializer: S) -> Result<S::Ok, S::Error>

Serialize this value into the given Serde serializer.

impl Copy for OperationId

impl Eq for OperationId

impl StructuralEq for OperationId

impl StructuralPartialEq for OperationId