Module xp

Defines a interface for managing “Experience Points” (XP) as an abstract economic primitive or a constrained resource.

XP can serve as a non-monetary metric representing a wide range of contextual values such as reputation, skill progression, contribution points, influence weight, or any form of quantified domain-specific value.

Experience Points (XP): A Formal Abstraction of Progress

Experience Points or XP, represent a quantifiable measure of progress, participation, or value within a system.

• Originally popularized in games to track advancement, now a known primitive for measuring engagement and achievement.
• Encodes effort, contribution, or status into a visible, programmable metric.

Key Properties

• Non-transferable: Linked to a specific user or role, cannot be freely moved like currency.
• Earned: Collected through effort or activity, cannot be bought or arbitrarily inflated.
• Contextual: Interpreted according to the domain’s rules and objectives.
• Comparable: Can be ranked or measured, but is not fungible.

These properties make XP an economic primitive for designing systems that value engagement, merit, and progression over purely financial or fungible incentives.

Overview

The system is composed of modular-traits that define behaviors such as:

• XP creation, mutation, and ownership
• Locking and reserving XP for runtime-intents
• Burning/slashing XP as penalties or resets
• Emitting events to reflect lifecycle changes

Implementers of this interface can define their own internal mechanics while providing a standardized API. This trait-oriented design supports flexible integration across any system that needs to quantify and govern non-monetary value.

Use Cases

XP can be used anywhere progress, participation, or contribution needs to be measured or rewarded.

Common scenarios include:

• Governance: Reputation, voting influence, contribution tracking.
• Gaming: Player progression, unlockable content, skill-based gating.
• Workplace: Skill development, training milestones, peer recognition.
• Communities: Engagement scores, moderation trust, contributor incentives.
• Supply Chains: Performance metrics, reliability scoring, compliance history.

Enums

XpError

XP-related error types.

Traits

BeginXp

Blanket Trait for safe initialization and earning of XP entries.

XpErrorHandler

A trait for mapping domain-level XP errors into caller- or pallet-specific error types.

XpLock

Trait for issuing and managing XP locks.

XpLockListener

Listener trait for XP locking events.

XpMutate

Trait for mutating (modifying) XP entries and providing default support utilities.

XpMutateListener

Listener trait for XP mutation events.

XpOwner

Trait for XP ownership and access control.

XpOwnerListener

Listener trait for XP ownership events.

XpReap

Trait for XP lifecycle finalization (reaping) with built-in support utilities.

XpReapListener

Listener trait for XP reaping events.

XpReserve

Trait for reserving XP under specific reasons with built-in support utilities.

XpReserveListener

Listener trait for XP reserving events.

XpSystem

Core trait for querying XP state and metadata.

XpSystemExtensions

Root trait for XP system extensions.

Type Aliases

Key

Alias for XpSystem::XpKey

LockReason

Alias for XpLock::LockReason

Owner

Alias for XpOwner::Owner

Points

Alias for XpSystem::Points

ReserveReason

Alias for XpReserve::ReserveReason