Digital Asset Leasing Platform

A smart contract for the Stacks blockchain that enables digital asset holders to lease their tokens for revenue generation while allowing lessees to utilize assets temporarily without full acquisition.

Overview

This platform creates a decentralized marketplace where:

• Asset Holders can post their digital assets for lease and earn passive income
• Lessees can temporarily use assets without purchasing them outright
• Platform facilitates secure transactions with dispute resolution mechanisms

Key Features

For Asset Holders

• List digital assets for lease with custom pricing
• Set minimum and maximum lease terms
• Earn revenue from multiple lease cycles
• Update pricing when assets are not actively leased
• Remove listings when no active leases exist

For Lessees

• Browse available assets and get instant pricing quotes
• Lease assets for flexible durations
• Deposit system ensures responsible usage
• Automatic deposit return upon asset return
• Transaction history tracking

Platform Features

• 5% service fee (configurable by admin)
• Automated expiration handling
• Dispute resolution system
• User metrics and reputation scoring
• Revenue tracking and withdrawal

Contract Functions

Core Operations

post-asset-for-lease

Posts a digital asset for lease with specified terms.

(post-asset-for-lease asset-contract asset-id rate-per-block minimum-term maximum-term)

lease-asset

Leases an available asset for a specified duration.

(lease-asset post-id term)

return-asset

Returns a leased asset and retrieves deposit.

(return-asset post-id)

Management Functions

auto-return-expired

Anyone can trigger return of expired leases.

(auto-return-expired post-id)

update-lease-rate

Asset holders can update pricing when not actively leased.

(update-lease-rate post-id new-rate-per-block)

remove-posting

Asset holders can remove listings when no active lease exists.

(remove-posting post-id)

Read-Only Functions

• get-posting(post-id) - Get lease posting details
• get-current-lease(post-id) - Get active lease information
• get-user-metrics(user) - Get user statistics and reputation
• get-lease-estimate(post-id, term) - Calculate lease costs before committing
• is-lease-expired(post-id) - Check if a lease has expired
• get-platform-statistics() - View platform metrics

Economic Model

Pricing Structure

• Lease Cost: rate-per-block × lease-duration
• Service Fee: 5% of lease cost (goes to platform)
• Deposit: 20% of lease cost (returned when asset is returned)
• Total Payment: lease-cost + deposit

Revenue Distribution

• Asset Holder: 95% of lease cost
• Platform: 5% service fee
• Lessee: Deposit returned upon asset return

Security Features

Deposit System

• 20% deposit required from lessees
• Automatically returned when asset is properly returned
• Can be forfeited in dispute resolution

Access Controls

• Only asset holders can modify their postings
• Only lessees can return their leased assets
• Platform admin can resolve disputes
• Prevents self-leasing

Validation

• Comprehensive input validation
• Ownership verification requirements
• Duration limits enforcement
• Prevents double-listing of assets

Admin Functions

Platform administrators can:

• set-service-fee-percentage - Adjust platform fees (max 20%)
• set-term-limits - Configure minimum/maximum lease durations
• withdraw-service-fees - Withdraw accumulated platform revenue
• resolve-conflict - Handle disputes between parties

Error Codes

• u200 - Admin-only function
• u201 - Item not found
• u202 - Access denied
• u203 - Invalid value
• u204 - Asset already posted
• u205 - Asset not accessible for lease
• u206 - Lease currently in progress
• u207 - Lease has ended
• u208 - Insufficient funds
• u209 - Invalid timeframe
• u210 - Asset not controlled by caller

Usage Example

;; 1. Post an asset for lease
(contract-call? .asset-lease-contract post-asset-for-lease 
  .my-nft-contract 
  u123 
  u100  ;; 100 microSTX per block
  u144  ;; minimum 1 day
  u1440 ;; maximum 10 days
)

;; 2. Get a quote for leasing
(contract-call? .asset-lease-contract get-lease-estimate u1 u720) ;; 5 days

;; 3. Lease the asset
(contract-call? .asset-lease-contract lease-asset u1 u720)

;; 4. Return the asset
(contract-call? .asset-lease-contract return-asset u1)