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# System prepended metadata

title: Prize Tier Controller App Spec

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# Prize Tier Controller App Spec

Feature

A new way of computing chance using a Draw Percentage Rate (DPR).

The "probability space" (Total Picks) is currently proportional to the liquidity held by each Prize Pool. 

DPR changes this distribution mechanism to be a percentage set by a manager rather than the TVL. 

These changes are a part of the configured PrizeTier stored on a PrizeTierHistory or PrizeTierHistoryV2 contract.

Stakeholders

Depositor

Manager (Finance Team)

User Stories

As a depositor/manager I want to be learn what the PrizeTier is & how it impacts the protocol

As a depositor/manager I want to be able to view the current PrizeTier configuration for all chains

As a manager I want to be able to update the PrizeTier configuration for all chains

As a manager I want to be able to view outcome of a potential PrizeTier configuration for all chains

(stretch) I want to view projections: monthly counts of prizes, yearly counts of prizes

I want a clear view as to whether changes will cause an increase or decrease in prizes, etc.

As a manager I want to be able to copy function input for updating PrizeTiers through Etherscan as a back up

(stretch) As a depositor/manager I want to be able to share my configuration with a link

