Struct ProviderCapabilities 

#[non_exhaustive]
pub struct ProviderCapabilities {
    pub chain: ChainCapability,
    pub depth: bool,
    pub greeks: GreeksCapability,
    pub option_stream: OptionStreamCapability,
    pub underlying_stream: bool,
    pub chain_poll: ChainPollCapability,
    pub trades_tape: bool,
    pub auth: AuthKind,
}

The honest, static capability self-declaration a Provider returns (docs/03-data-providers.md §2). Streaming is three independent dimensions — option_stream, underlying_stream, and chain_poll — so a real-time underlying is never mistaken for a real-time option chain.

#[non_exhaustive]: an external adapter never uses a struct literal to build this — it constructs through ProviderCapabilities::builder, so ChainView can add a new optional dimension (a field with a safe default) as a minor bump without breaking a downstream adapter’s construction (SEMVER.md).

Fields (Non-exhaustive)

Non-exhaustive structs could have additional fields added in future. Therefore, non-exhaustive structs cannot be constructed in external crates using the traditional Struct { .. } syntax; cannot be matched against without a wildcard ..; and struct update syntax will not work.

chain: ChainCapability

How (or whether) the provider produces a chain.

depth: bool

Whether the provider delivers order-book depth for the selected instrument class (option chains in v1).

greeks: GreeksCapability

Whether Greeks/IV are venue-provided, computed locally, or unavailable.

option_stream: OptionStreamCapability

The contract-level quote/Greek stream that overlays onto a chain.

underlying_stream: bool

Whether the provider streams the underlying/index price.

chain_poll: ChainPollCapability

How the chain structure is kept current (REST polling cadence).

trades_tape: bool

Whether the provider exposes a normalized public trades tape.

auth: AuthKind

The authentication the provider requires.

Implementations

impl ProviderCapabilities

pub fn builder() -> ProviderCapabilitiesBuilder

The only cross-crate construction path (docs/03-data-providers.md §2). Every dimension starts at its safe, least-capable default, so a future new field lands with a default that keeps existing external adapters compiling and honest.

Examples

use chainview::{ChainCapability, ChainPollCapability, ProviderCapabilities};

let caps = ProviderCapabilities::builder()
    .chain(ChainCapability::Assemble)
    .depth(true)
    .chain_poll(ChainPollCapability::Poll { interval_hint_secs: 2 })
    .build();
assert!(caps.depth);
assert_eq!(caps.chain, ChainCapability::Assemble);

Trait Implementations

impl Clone for ProviderCapabilities

fn clone(&self) -> ProviderCapabilities

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Copy for ProviderCapabilities

impl Debug for ProviderCapabilities

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

Formats the value using the given formatter.

impl Eq for ProviderCapabilities

impl PartialEq for ProviderCapabilities

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

Equality operator ==.

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

Inequality operator !=.

impl StructuralPartialEq for ProviderCapabilities