domain-pricing — IMP FORGE

Tiered pricing and discounts for Rust applications

Tier	domain
Role	unclassified (baselined)
Path	`crates/domain/pricing`
Edition	2021
Targets	domain_pricing
Public items	58 across 0 modules
Tests	30

What it is for

Tiered pricing and discount library crates for Rust applications.

This crate provides:

Tier trait for defining custom pricing tiers
TieredPrice for prices that vary by customer tier
PriceBreak for quantity-based pricing (bulk discounts)
Discount for applying discounts (percentage or fixed)
PricingCalculator for computing final prices with all rules

# Example

use domain_pricing::{StandardTier, TieredPrice, PricingCalculator};
use rust_decimal::Decimal;

// Create tiered pricing
let price = TieredPrice::new(
Decimal::from(100),  // Regular price
Decimal::from(85),   // Member price
Decimal::from(70),   // VIP price
);

// Get price for a tier
let member_price = price.price_for_tier(StandardTier::Member);

Capabilities

`B2BTier`

Tiered pricing and discount library crates for Rust applications.

Item
`pub enum B2BTier`
`B2BTier :: fn fmt(& self, f : & mut std::fmt::Formatter <'_>) -> std::fmt::Result`

`Discount:Discount`

Tiered pricing and discount library crates for Rust applications.

Item
`pub struct Discount`

`Discount:apply`

Tiered pricing and discount library crates for Rust applications.

Item
`Discount :: fn apply(& self, price : Decimal) -> Decimal`

`Discount:calculate`

Tiered pricing and discount library crates for Rust applications.

Item
`Discount :: fn calculate(& self, price : Decimal) -> Decimal`

`Discount:can`

Tiered pricing and discount library crates for Rust applications.

Item
`Discount :: fn can_apply_to(& self, order_value : Decimal) -> bool`

`Discount:fixed`

Tiered pricing and discount library crates for Rust applications.

Item
`Discount :: fn fixed(name : impl Into <String>, amount : Decimal) -> Self`

`Discount:is`

Tiered pricing and discount library crates for Rust applications.

Item
`Discount :: fn is_valid(& self) -> bool`

`Discount:percentage`

Tiered pricing and discount library crates for Rust applications.

Item
`Discount :: fn percentage(name : impl Into <String>, rate : Decimal) -> Self`

`Discount:record`

Tiered pricing and discount library crates for Rust applications.

Item
`Discount :: fn record_usage(& mut self)`

`Discount:with`

Tiered pricing and discount library crates for Rust applications.

Item
`Discount :: fn with_code(mut self, code : impl Into <String>) -> Self`
`Discount :: fn with_min_order(mut self, min : Decimal) -> Self`
`Discount :: fn with_max_discount(mut self, max : Decimal) -> Self`
`Discount :: fn with_validity(mut self, from : DateTime <Utc>, until : DateTime <Utc>) -> Self`
`Discount :: fn with_usage_limit(mut self, limit : i32) -> Self`

`DiscountType`

Tiered pricing and discount library crates for Rust applications.

Item
`pub enum DiscountType`
`DiscountType :: fn fmt(& self, f : & mut std::fmt::Formatter <'_>) -> std::fmt::Result`

`FlexTieredPrice`

Tiered pricing and discount library crates for Rust applications.

Item
`pub struct FlexTieredPrice`
`FlexTieredPrice :: fn new(base_price : Decimal) -> Self`
`FlexTieredPrice :: fn with_tier_price(mut self, tier : impl Into <String>, price : Decimal) -> Self`
`FlexTieredPrice :: fn price_for_tier(& self, tier : & str) -> Decimal`

`MinimumCharge`

Tiered pricing and discount library crates for Rust applications.

Item
`pub struct MinimumCharge`
`MinimumCharge :: fn new(amount : Decimal) -> Self`
`MinimumCharge :: fn with_description(mut self, desc : impl Into <String>) -> Self`
`MinimumCharge :: fn apply(& self, price : Decimal) -> Decimal`

`PriceBreak`

Tiered pricing and discount library crates for Rust applications.

Item
`pub struct PriceBreak`
`PriceBreak :: fn new(min_quantity : i32, unit_price : Decimal) -> Self`
`PriceBreak :: fn with_max(mut self, max : i32) -> Self`
`PriceBreak :: fn with_description(mut self, desc : impl Into <String>) -> Self`
`PriceBreak :: fn contains(& self, quantity : i32) -> bool`

`PriceCalculation`

Tiered pricing and discount library crates for Rust applications.

Item
`pub struct PriceCalculation`
`PriceCalculation :: fn total_savings(& self) -> Decimal`
`PriceCalculation :: fn effective_unit_price(& self) -> Decimal`

`PricingCalculator`

Tiered pricing and discount library crates for Rust applications.

Item
`pub struct PricingCalculator`
`PricingCalculator :: fn new() -> Self`
`PricingCalculator :: fn with_minimum_charge(mut self, minimum : MinimumCharge) -> Self`
`PricingCalculator :: fn with_discount(mut self, discount : Discount) -> Self`
`PricingCalculator :: fn calculate(& self, tiered_price : & TieredPrice, tier : StandardTier, quantity : i32,) -> PriceCalculation`
`PricingCalculator :: fn calculate_with_quantity_pricing(& self, quantity_pricing : & QuantityPricing, quantity : i32,) -> PriceCalculation`

`PricingError`

Tiered pricing and discount library crates for Rust applications.

Item
`pub enum PricingError`

`QuantityPricing`

Tiered pricing and discount library crates for Rust applications.

Item
`pub struct QuantityPricing`
`QuantityPricing :: fn new(base_price : Decimal) -> Self`
`QuantityPricing :: fn with_break(mut self, price_break : PriceBreak) -> Self`
`QuantityPricing :: fn unit_price_for_quantity(& self, quantity : i32) -> Decimal`
`QuantityPricing :: fn total_for_quantity(& self, quantity : i32) -> Decimal`
`QuantityPricing :: fn break_for_quantity(& self, quantity : i32) -> Option <& PriceBreak>`

`Result`

Tiered pricing and discount library crates for Rust applications.

Item
`pub type Result<T>: std::result::Result <T, PricingError>`

`StandardTier`

Tiered pricing and discount library crates for Rust applications.

Item
`pub enum StandardTier`
`StandardTier :: fn fmt(& self, f : & mut std::fmt::Formatter <'_>) -> std::fmt::Result`
`StandardTier :: fn discount_rate(& self) -> Decimal`
`StandardTier :: fn all() -> & 'static Self`

`TieredPrice`

Tiered pricing and discount library crates for Rust applications.

Item
`pub struct TieredPrice`
`TieredPrice :: fn new(regular : Decimal, member : Decimal, vip : Decimal) -> Self`
`TieredPrice :: fn flat(price : Decimal) -> Self`
`TieredPrice :: fn from_base_with_discounts(base : Decimal, member_discount : Decimal, vip_discount : Decimal,) -> Self`
`TieredPrice :: fn price_for_tier(& self, tier : StandardTier) -> Decimal`
`TieredPrice :: fn discount_for_tier(& self, tier : StandardTier) -> Decimal`
`TieredPrice :: fn discount_rate_for_tier(& self, tier : StandardTier) -> Decimal`

How to use it

From this crate's own rustdoc:

use domain_pricing::{StandardTier, TieredPrice, PricingCalculator};
use rust_decimal::Decimal;

// Create tiered pricing
let price = TieredPrice::new(
    Decimal::from(100),  // Regular price
    Decimal::from(85),   // Member price
    Decimal::from(70),   // VIP price
);

// Get price for a tier
let member_price = price.price_for_tier(StandardTier::Member);

Module structure

No public modules: the crate root is its whole surface.

Public surface

`crate root`

Item	What it is
`pub enum PricingError`	Errors that can occur with pricing operations.
`pub type Result<T>: std::result::Result <T, PricingError>`	Result type for pricing operations.
`pub enum StandardTier`	Standard pricing tiers (Regular, Member, VIP)
`StandardTier :: fn fmt(& self, f : & mut std::fmt::Formatter <'_>) -> std::fmt::Result`	—
`StandardTier :: fn discount_rate(& self) -> Decimal`	Returns the discount percentage for this tier (0.0 to 1.0).
`StandardTier :: fn all() -> & 'static Self`	Returns all tiers in order from lowest to highest discount.
`pub enum B2BTier`	Business-to-business pricing tiers.
`B2BTier :: fn fmt(& self, f : & mut std::fmt::Formatter <'_>) -> std::fmt::Result`	—
`pub struct TieredPrice`	Price that varies by customer tier
`TieredPrice :: fn new(regular : Decimal, member : Decimal, vip : Decimal) -> Self`	Creates a new tiered price.
`TieredPrice :: fn flat(price : Decimal) -> Self`	Creates a flat price (same for all tiers).
`TieredPrice :: fn from_base_with_discounts(base : Decimal, member_discount : Decimal, vip_discount : Decimal,) -> Self`	Creates tiered pricing from a base price with percentage discounts.
`TieredPrice :: fn price_for_tier(& self, tier : StandardTier) -> Decimal`	Gets the price for a specific tier.
`TieredPrice :: fn discount_for_tier(& self, tier : StandardTier) -> Decimal`	Returns the discount amount for a tier compared to regular price.
`TieredPrice :: fn discount_rate_for_tier(& self, tier : StandardTier) -> Decimal`	Returns the discount percentage for a tier (0.0 to 1.0).
`pub struct FlexTieredPrice`	Flexible tiered pricing using a `HashMap` for custom tiers.
`FlexTieredPrice :: fn new(base_price : Decimal) -> Self`	Creates a new flexible tiered price.
`FlexTieredPrice :: fn with_tier_price(mut self, tier : impl Into <String>, price : Decimal) -> Self`	Sets a price for a specific tier.
`FlexTieredPrice :: fn price_for_tier(& self, tier : & str) -> Decimal`	Gets the price for a tier (returns base if tier not found).
`pub struct PriceBreak`	A price break for quantity-based pricing.
`PriceBreak :: fn new(min_quantity : i32, unit_price : Decimal) -> Self`	Creates a new price break.
`PriceBreak :: fn with_max(mut self, max : i32) -> Self`	Sets the maximum quantity.
`PriceBreak :: fn with_description(mut self, desc : impl Into <String>) -> Self`	Sets the description.
`PriceBreak :: fn contains(& self, quantity : i32) -> bool`	Checks if a quantity falls within this break.
`pub struct QuantityPricing`	Quantity-based pricing schedule (price breaks).
`QuantityPricing :: fn new(base_price : Decimal) -> Self`	Creates a new quantity pricing schedule.
`QuantityPricing :: fn with_break(mut self, price_break : PriceBreak) -> Self`	Adds a price break.
`QuantityPricing :: fn unit_price_for_quantity(& self, quantity : i32) -> Decimal`	Gets the unit price for a quantity.
`QuantityPricing :: fn total_for_quantity(& self, quantity : i32) -> Decimal`	Calculates the total price for a quantity.
`QuantityPricing :: fn break_for_quantity(& self, quantity : i32) -> Option <& PriceBreak>`	Returns the applicable price break for a quantity.
`pub enum DiscountType`	Type of discount.
`DiscountType :: fn fmt(& self, f : & mut std::fmt::Formatter <'_>) -> std::fmt::Result`	—
`pub struct Discount`	A discount that can be applied to a price.
`Discount :: fn percentage(name : impl Into <String>, rate : Decimal) -> Self`	Creates a percentage discount.
`Discount :: fn fixed(name : impl Into <String>, amount : Decimal) -> Self`	Creates a fixed amount discount.
`Discount :: fn with_code(mut self, code : impl Into <String>) -> Self`	Sets the discount code.
`Discount :: fn with_min_order(mut self, min : Decimal) -> Self`	Sets the minimum order value.
`Discount :: fn with_max_discount(mut self, max : Decimal) -> Self`	Sets the maximum discount amount.
`Discount :: fn with_validity(mut self, from : DateTime <Utc>, until : DateTime <Utc>) -> Self`	Sets the validity period.
`Discount :: fn with_usage_limit(mut self, limit : i32) -> Self`	Sets the usage limit.
`Discount :: fn is_valid(& self) -> bool`	Checks if the discount is currently valid.
`Discount :: fn can_apply_to(& self, order_value : Decimal) -> bool`	Checks if the discount can be applied to an order value.
`Discount :: fn calculate(& self, price : Decimal) -> Decimal`	Calculates the discount amount for a given price.
`Discount :: fn apply(& self, price : Decimal) -> Decimal`	Applies the discount to a price.
`Discount :: fn record_usage(& mut self)`	Increments the usage count.
`pub struct MinimumCharge`	Minimum charge configuration.
`MinimumCharge :: fn new(amount : Decimal) -> Self`	Creates a new minimum charge.
`MinimumCharge :: fn with_description(mut self, desc : impl Into <String>) -> Self`	Sets the description.
`MinimumCharge :: fn apply(& self, price : Decimal) -> Decimal`	Applies the minimum charge to a calculated price.
`pub struct PriceCalculation`	Result of a price calculation.
`PriceCalculation :: fn total_savings(& self) -> Decimal`	Returns the total savings.
`PriceCalculation :: fn effective_unit_price(& self) -> Decimal`	Returns the effective unit price.
`pub struct PricingCalculator`	Pricing calculator that combines tiers, quantities, discounts, and minimums.
`PricingCalculator :: fn new() -> Self`	Creates a new pricing calculator.
`PricingCalculator :: fn with_minimum_charge(mut self, minimum : MinimumCharge) -> Self`	Sets the minimum charge.
`PricingCalculator :: fn with_discount(mut self, discount : Discount) -> Self`	Adds a discount.
`PricingCalculator :: fn calculate(& self, tiered_price : & TieredPrice, tier : StandardTier, quantity : i32,) -> PriceCalculation`	Calculates the price for a tiered price and quantity.
`PricingCalculator :: fn calculate_with_quantity_pricing(& self, quantity_pricing : & QuantityPricing, quantity : i32,) -> PriceCalculation`	Calculates price with quantity-based pricing.

No pub use re-exports: every item above is declared in this crate.

Boundary

Depends on no other workspace tier.

Shares tier domain with 41 other crates: domain-agreements, domain-ai-report, domain-billing, domain-catalog, domain-classify, domain-comments, domain-competitive-intel, domain-contact, … (41 total).

_What this crate deliberately does NOT own is a judgment. No committed registry records one for it, so none is stated here._

Where it sits

Tier (ontology)	`domain`
Architectural role (taxonomy)	`unclassified (baselined)`
Location	`crates/domain/pricing`
Vocabulary in force (lexicon)	`current`

Dependencies

Runtime, from outside the workspace.

Crate	Requirement	Features	Optional	Only on
`chrono`	`^0.4`	`serde`	no	always
`rust_decimal`	`^1`	`serde`	no	always
`serde`	`^1`	`derive`	no	always
`serde_json`	`^1`	—	no	always
`thiserror`	`^2`	—	no	always
`uuid`	`^1`	`v4`, `v7`, `serde`, `js`	no	always

Development, from outside the workspace.

Crate	Requirement	Features	Optional	Only on
`rust_decimal_macros`	`^1`	—	no	always
`tokio`	`^1`	`full`	no	always

Build. None.

Depended on by. Nothing in this workspace.

Feature flags

No Cargo features are defined: every capability is unconditional, so no consumer can receive a half-wired crate.

Targets

Kind	Name	Source
lib	`domain_pricing`	`src/lib.rs`

Error model

Error type	Named by
`PricingError`	`Result`

Operational characteristics

Property	Evidence
async public surface	none detected
async runtime	none detected
database access	none detected
network I/O	none detected
unsafe code	none detected
environment variables	none detected

No unsafe block, unsafe fn, unsafe impl or unsafe trait was found by the parser anywhere in this crate's source.

Configuration

No environment variable is read with a literal name anywhere in this crate. A variable whose key is computed at run time cannot be listed here, and is not claimed to be absent.

No workspace crate depends on this one.

Verification

Kind	Count
Unit tests	30
Integration tests	0
Examples	0
Doctests	1

Evidence by module. How often each public module is named by something executable.

Module	Tests	Examples	Consumers
`crate root`	13	0	0

What the tests establish, by name:

test_discount_fixed — src/lib.rs
test_discount_percentage — src/lib.rs
test_discount_serialization — src/lib.rs
test_discount_usage_limit — src/lib.rs
test_discount_with_code — src/lib.rs
test_discount_with_max — src/lib.rs
test_discount_with_min_order — src/lib.rs
test_flex_tiered_price — src/lib.rs
test_minimum_charge — src/lib.rs
test_price_break_contains — src/lib.rs
test_price_calculation_effective_unit_price — src/lib.rs
test_price_calculation_savings — src/lib.rs
test_pricing_calculator_simple — src/lib.rs
test_pricing_calculator_with_discount — src/lib.rs
test_pricing_calculator_with_minimum — src/lib.rs
test_pricing_calculator_with_quantity — src/lib.rs
test_pricing_calculator_with_quantity_pricing — src/lib.rs
test_quantity_pricing_basic — src/lib.rs
test_quantity_pricing_serialization — src/lib.rs
test_quantity_pricing_total — src/lib.rs
test_standard_tier_all — src/lib.rs
test_standard_tier_default — src/lib.rs
test_standard_tier_display — src/lib.rs
test_tiered_price_discount_for_tier — src/lib.rs
test_tiered_price_discount_rate — src/lib.rs
test_tiered_price_flat — src/lib.rs
test_tiered_price_for_tier — src/lib.rs
test_tiered_price_from_base_with_discounts — src/lib.rs
test_tiered_price_new — src/lib.rs
test_tiered_price_serialization — src/lib.rs

Documentation coverage

Measure	Documented	Total
Public items with rustdoc	55	58
Public modules with a `//!` block	0	0

pie showData
    title Public items with rustdoc
    "Documented" : 55
    "No rustdoc detected" : 3

Metrics

Metric	Value
Rust source files	1
Source lines	1129
Code lines	786
Public API items	58
Public modules	0
Tests	30
Examples	0
Cargo features	0
Direct runtime dependencies	6
Workspace reverse dependencies	0

pie showData
    title Public API by kind
    "enum" : 4
    "method" : 45
    "struct" : 8
    "type alias" : 1

pie showData
    title Rust source composition
    "Code" : 786
    "Blank or comment" : 343

Generation

Rendered by tools-corpus corpus readme from repository evidence alone, renderer schema 2, lexicon current. No model, network service or database was consulted. Regenerate with tools-corpus corpus readme --write; verify with --check.

What it is for

Capabilities

B2BTier

Discount:Discount

Discount:apply

Discount:calculate

Discount:can

Discount:fixed

Discount:is

Discount:percentage

Discount:record

Discount:with

DiscountType

FlexTieredPrice

MinimumCharge

PriceBreak

PriceCalculation

PricingCalculator

PricingError

QuantityPricing

Result

StandardTier

TieredPrice

How to use it

Module structure

Public surface

Boundary

Where it sits

Dependencies

Feature flags

Targets

Error model

Operational characteristics

Configuration

Related capabilities

Verification

Documentation coverage

Metrics

Generation

`B2BTier`

`Discount:Discount`

`Discount:apply`

`Discount:calculate`

`Discount:can`

`Discount:fixed`

`Discount:is`

`Discount:percentage`

`Discount:record`

`Discount:with`

`DiscountType`

`FlexTieredPrice`

`MinimumCharge`

`PriceBreak`

`PriceCalculation`

`PricingCalculator`

`PricingError`

`QuantityPricing`

`Result`

`StandardTier`

`TieredPrice`