Crate confium_attributes 

Attribute-based threshold party selection.

Allows deployments to express predicates like:

• “at least K signers have attribute X”
• “at least K distinct values of attribute X”
• “no signer has attribute Y”
• “all signers have attribute Z”

Predicates compose via boolean AND/OR/NOT.

See TODO.roadmap/38-attribute-based-threshold.md for the full spec.

Structs

AttributePredicate

A wrapper for type-safe construction.

SignerAttributes

A signer’s attribute map. Keys are attribute names (e.g., “region”, “role:director”, “expertise:metrology”). Values are sets of strings.

Enums

ParseError

DSL parse errors.

Predicate

A predicate over signer attributes.

Constants

MAX_DSL_DEPTH

Maximum nesting depth for recursive DSL constructs (and/or/not). Limits stack-overflow DoS via adversarial inputs. 32 is generous (allows and(and(and(...))) 32 levels deep) and small enough to keep Rust stack usage bounded.

Functions

evaluate

Evaluate predicate against a list of signers. Returns true iff satisfied.

parse

Parse a DSL expression into a Predicate.