fedimint_core::module

Struct ApiVersion

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pub struct ApiVersion {
    pub major: u32,
    pub minor: u32,
}
Expand description

Api version supported by a core server or a client/server module at a given ModuleConsensusVersion.

Changing ModuleConsensusVersion implies resetting the api versioning.

For a client and server to be able to communicate with each other:

  • The client needs API version support for the ModuleConsensusVersion that the server is currently running with.
  • Within that ModuleConsensusVersion during handshake negotiation process client and server must find at least one Api::major version where client’s minor is lower or equal server’s major version.

A practical module implementation needs to implement large range of version backward compatibility on both client and server side to accommodate end user client devices receiving updates at a pace hard to control, and technical and coordination challenges of upgrading servers.

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§major: u32

Major API version

Each time ModuleConsensusVersion is incremented, this number (and minor number as well) should be reset to 0.

Should be incremented each time the API was changed in a backward-incompatible ways (while resetting minor to 0).

§minor: u32

Minor API version

  • For clients this means minimum supported minor version of the major version required by client implementation
  • For servers this means maximum supported minor version of the major version implemented by the server implementation

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impl ApiVersion

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pub const fn new(major: u32, minor: u32) -> Self

Trait Implementations§

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impl Clone for ApiVersion

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fn clone(&self) -> ApiVersion

Returns a copy of the value. Read more
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fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source. Read more
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impl Debug for ApiVersion

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

Formats the value using the given formatter. Read more
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impl Decodable for ApiVersion

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

Decode Self from a size-limited reader. Read more
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fn consensus_decode<R: Read>( r: &mut R, modules: &ModuleDecoderRegistry, ) -> Result<Self, DecodeError>

Decode an object with a well-defined format. Read more
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fn consensus_decode_hex( hex: &str, modules: &ModuleDecoderRegistry, ) -> Result<Self, DecodeError>

Decode an object from hex
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fn consensus_decode_vec( bytes: Vec<u8>, modules: &ModuleDecoderRegistry, ) -> Result<Self, DecodeError>

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impl<'de> Deserialize<'de> for ApiVersion

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

Deserialize this value from the given Serde deserializer. Read more
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impl Encodable for ApiVersion

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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. Read more
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fn consensus_encode_to_vec(&self) -> Vec<u8>

Self::consensus_encode to newly allocated Vec<u8>
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fn consensus_encode_to_hex(&self) -> String

Encode and convert to hex string representation
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fn consensus_encode_to_len(&self) -> usize

Encode without storing the encoding, return the size
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fn consensus_hash<H>(&self) -> H
where H: Hash, H::Engine: Write,

Generate a SHA256 hash of the consensus encoding using the default hash engine for H. Read more
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impl FromIterator<ApiVersion> for Result<MultiApiVersion, ApiVersion>

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fn from_iter<T: IntoIterator<Item = ApiVersion>>(iter: T) -> Self

Creates a value from an iterator. Read more
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impl Ord for ApiVersion

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fn cmp(&self, other: &Self) -> Ordering

This method returns an Ordering between self and other. Read more
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fn max(self, other: Self) -> Self
where Self: Sized,

Compares and returns the maximum of two values. Read more
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fn min(self, other: Self) -> Self
where Self: Sized,

Compares and returns the minimum of two values. Read more
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fn clamp(self, min: Self, max: Self) -> Self
where Self: Sized,

Restrict a value to a certain interval. Read more
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impl PartialEq for ApiVersion

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

Tests for self and other values to be equal, and is used by ==.
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fn ne(&self, other: &Rhs) -> bool

Tests for !=. The default implementation is almost always sufficient, and should not be overridden without very good reason.
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impl PartialOrd for ApiVersion

use fedimint_core::module::ApiVersion;
assert!(ApiVersion { major: 3, minor: 3 } < ApiVersion { major: 4, minor: 0 });
assert!(ApiVersion { major: 3, minor: 3 } < ApiVersion { major: 3, minor: 5 });
assert!(ApiVersion { major: 3, minor: 3 } == ApiVersion { major: 3, minor: 3 });
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fn partial_cmp(&self, other: &Self) -> Option<Ordering>

This method returns an ordering between self and other values if one exists. Read more
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fn lt(&self, other: &Rhs) -> bool

Tests less than (for self and other) and is used by the < operator. Read more
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fn le(&self, other: &Rhs) -> bool

Tests less than or equal to (for self and other) and is used by the <= operator. Read more
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fn gt(&self, other: &Rhs) -> bool

Tests greater than (for self and other) and is used by the > operator. Read more
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fn ge(&self, other: &Rhs) -> bool

Tests greater than or equal to (for self and other) and is used by the >= operator. Read more
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impl Serialize for ApiVersion

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fn serialize<__S>(&self, __serializer: __S) -> Result<__S::Ok, __S::Error>
where __S: Serializer,

Serialize this value into the given Serde serializer. Read more
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impl Copy for ApiVersion

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impl Eq for ApiVersion

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impl StructuralPartialEq for ApiVersion

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