Lotto

Lotto is a transparent, provably fair lottery system built on the Flow blockchain. It enables users to create and participate in lottery sessions with automatic prize distribution.

How It Works

Session Creation:

• Any user can create a lottery session by specifying:

  • Ticket price (in FLOW tokens)

  • Session duration (start and end time)

  • Prize distribution percentages

Participation:

• Users purchase tickets during active sessions

• Each ticket costs a fixed FLOW amount set by the creator

• Multiple tickets can be purchased to increase winning chances

• All ticket purchases contribute to the total prize pool

Prize Distribution:

• When a session ends, it must be closed by calling the close function

• The system uses Flow's secure on-chain randomness to select a winner fairly

• Prize pool is distributed as follows:

  • Winner: Receives the majority of the pool (configurable percentage)

  • Creator: Receives a commission for hosting the session

  • Closer: Receives a small reward for triggering the session closure

• Distribution percentages are set during session creation and stored immutably on-chain

Transparency:

• All session data (participants, tickets, prize pool) is publicly visible

• Session status updates in real-time (Active/Ended/Closed)

• Winner selection is cryptographically verifiable

• Complete transaction history available on Flow blockchain

The platform combines Flow's native token economics with provably fair randomness for a trustless lottery experience.