lambda-prize/prizes/LP-0013.md

LP-0013: Token program improvements: authorities [OPEN]

Logos Circle: N/A

Overview

This prize targets practical, production-oriented improvements to the LEZ Token program to support controlled, real-world token issuance. The current example is intentionally minimal; this challenge focuses on adding a mint authority model that enables variable supply, revocable control, and common issuance patterns expected by wallets and applications.

Solana’s SPL Token ecosystem is a useful reference point: it supports authority-controlled minting, enabling fixed supply, capped supply, permissioned minting, and revocation.

Motivation

Without minting authorities,token issuers cannot implement widely used supply models:

• fixed supply tokens (mint authority revoked),
• variable or inflationary supply,
• permissioned issuance,
• governance-controlled minting.

Adding a clean authority model enables the ecosystem to support real economic use cases while preserving minimalism and auditability.

Success Criteria

Functionality

• Variable-size Tokens through minting authority: Implement a mint authority model for LEZ tokens that supports:
  • mint authority set at token initialization,
  • minting by the authority,
  • authority rotation and/or revocation (e.g., set to None to make supply fixed).
• Documentation and examples: Provide:
  • at least two example integrations (e.g., “fixed supply token with revoked authority” and “variable supply token with mint authority”).
• Produced a self-sufficient, agnostic library that handles approval as defined in RFP-001.

Usability

• Provide a module/SDK that can be used to build Logos modules for interacting with the token program.
• Provide an IDL for the updated token program, using the SPEL framework.

Reliability

• Authority rotation and revocation are atomic — a partial failure leaves the authority in its prior state, not an undefined one.
• Minting with a revoked authority is rejected deterministically with a documented error code.

Performance

• Document the compute unit (CU) cost of each new operation (mint, rotate authority, revoke authority) on LEZ devnet/testnet. Note: LEZ's per-transaction compute budget may change during testnet.

Supportability

• The updated token program is deployed and tested on LEZ devnet/testnet.
• End-to-end integration tests run against a LEZ sequencer (standalone mode) and are included in CI.
• CI must be green on the default branch.
• A README documents end-to-end usage: deployment steps, program addresses, and step-by-step instructions for minting, rotating authority, and revoking authority via CLI.
• A reproducible end-to-end demo script is provided and works against a real local sequencer with RISC0_DEV_MODE=0.
• A recorded video demo of the end-to-end flow is included in the submission; the recording must show terminal output (including proof generation) to confirm RISC0_DEV_MODE=0 was active.

Scope

In Scope

• Mint authority (and optionally freeze authority if proposed, but not required).
• Clear specifications for authority semantics.
• Minimal, auditable implementation with strong tests.

Out of Scope

• A full-featured token standard with numerous optional extensions.
• Complex compliance systems, fee mechanics, or DEX integration.
• Pre-approved distribution patterns such as private allow-list or airdrop mechanisms (See LP-0003).

Prize Structure

• Total Prize: $600
• Effort: Medium

Eligibility

Open to any individual or team. Submissions must be original work. Teams must hold the rights to all submitted code and agree to license it under MIT or Apache-2.0.

Submission Requirements

• Public repository containing:
  • code changes to the token program,
  • README + design docs (authority model and lifecycle),
  • tests and example programmes/scripts.
• A narrated video walkthrough in which the builder explains what they built and why, walks through the architecture and key implementation decisions, and demonstrates the full end-to-end flow. A silent screencast is not sufficient (see demo requirements).

Evaluation Process

By default, submissions are evaluated first-come-first-served against the success criteria. The first submission that meets all criteria wins.

Evaluators will independently clone the repository and run the demo script from a clean environment; the script must succeed without modification. Evaluators may also ask technical follow-up questions to verify authorship and understanding of the implementation.

The following policies apply to all prizes (see evaluation policies):

• Submissions: each builder (or team) is allowed a maximum of 3 submissions per prize, with at most one submission/review per week.
• Feedback: initial evaluation feedback is limited to a pass/fail indication against the success criteria.

Resources

• LEZ Github repository
• Solana - Create a Token Account
• Solana - Token Extensions
• Solana - Set Authority

Potential for Subsequent λPrizes

This prize targets the current LEZ testnet. Should a future testnet version introduce breaking changes, a subsequent λPrize may be opened to cover the necessary adaptation and redeployment.