> ## Documentation Index > Fetch the complete documentation index at: https://docs.justpump.fun/llms.txt > Use this file to discover all available pages before exploring further. # Reward Claims > How reward claims work with signed vouchers and on-chain payouts ## Overview of Reward System JustPump distributes rewards to community members through a secure, user-initiated claim system. Rewards come from various sources including: * **Airdrop Fund**: 0.2% of JustSwap trades go to community airdrops * **Cashback Vault**: Insurance fund for failed projects (see [Cashback Vault](/cashback-vault)) * **Special Promotions**: Platform-sponsored campaigns and events All rewards use the same underlying mechanism: signed vouchers that you submit on-chain to claim your funds. *** ## How Reward Claims Work The reward system uses **signed vouchers** to enable secure, verifiable claims without complex on-chain logic. Based on your activity (trading volume, participation, specific events), you become eligible for rewards during distribution windows. The JustPump backend analyzes on-chain data and calculates your claimable amount based on eligibility criteria. A cryptographically signed voucher is generated containing: * Your wallet address * Reward amount (in SOL) * Expiration timestamp * Unique identifier (prevents replay) * Digital signature from authorized backend key You visit JustPump and submit the voucher. The smart contract verifies: * Signature is valid (matches authorized public key) * Voucher hasn't expired * Voucher hasn't been claimed before * Recipient matches your connected wallet Upon successful verification, the vault immediately transfers SOL to your wallet in the same transaction. You pay the transaction fee for claiming (typically \$0.001-0.005 in SOL). The reward amount is net of this fee. *** ## Design Principles ### User Pays Gas You pay the small transaction fee to submit your claim. This approach: * Prevents spam claims (users must intentionally claim) * Reduces platform costs (no automatic distributions) * Gives you control over timing (claim when convenient) Gas costs on Solana are extremely low—usually fractions of a cent per transaction. ### Near-Instant Reward Delivery Once you submit a valid voucher: * Verification happens in milliseconds * SOL transfers in the same transaction * No waiting periods or additional steps ### Minimal On-Chain Logic The smart contract only validates signatures and transfers funds. Complex eligibility logic stays off-chain, allowing: * Flexible criteria that can evolve over time * Lower gas costs (simple operations on-chain) * Reduced attack surface (less code = fewer vulnerabilities) ### Replay Protection and Security Each voucher has a unique identifier and can only be claimed once. The contract tracks all claimed vouchers to prevent double-spending. Additional security measures: * **Expiration timestamps**: Vouchers expire after a set period (e.g., 30 days) * **Signature verification**: Only vouchers signed by the authorized backend can be claimed * **Recipient validation**: Voucher can only be claimed by the specified wallet address *** ## Types of Rewards ### Airdrop Fund Distributions Funded by 0.2% of every JustSwap trade, the Airdrop Fund supports: * Periodic distributions to active traders * Loyalty rewards for long-term users * Community events and campaigns ### Cashback for Failed Projects When tokens fail or get rugged, eligible traders may receive cashback from the Insurance Fund. See [Cashback Vault](/cashback-vault) for details. ### Promotional Rewards Special campaigns may offer rewards for: * Participating in new token launches * Trading volume milestones * Referrals and community growth * Social media engagement *** ## Claiming Your Rewards ### Check Eligibility Visit [JustPump](https://justpump.fun) and connect your wallet to see: * Available rewards (if any) * Reward amounts * Expiration dates * Claim status ### Submit Your Claim Connect the wallet address that received the reward voucher. See the reward amount and expiration date. Ensure you have enough SOL for the transaction fee (\~\$0.001). Submit the transaction. Your wallet will prompt you to approve the small transaction fee. Upon confirmation, SOL is instantly transferred to your wallet. Check your balance to confirm. If you have multiple rewards available, you can claim them individually or in batches (if the interface supports it). *** ## Reward Calculation Methodology While specific formulas vary by reward type, common factors include: ### For Airdrop Distributions * **Trading volume**: More volume = larger share of the distribution * **Token diversity**: Trading across multiple tokens may increase rewards * **Consistency**: Regular participation may be weighted higher * **Time period**: Activity within the specific distribution window ### For Cashback Distributions * **Exposure to failed tokens**: Holding tokens that failed or got rugged * **Loss magnitude**: Larger losses may receive proportionally higher cashback * **Participation timing**: When you entered/exited relative to the failure * **Vault balance**: Total cashback divided among eligible users Exact formulas are determined by the backend and may evolve over time to optimize fairness and incentivize healthy platform participation. *** ## Frequently Asked Questions ### How do I know if I have rewards available? Connect your wallet on [JustPump](https://justpump.fun). If you have unclaimed rewards, they'll appear in the Rewards section. ### Do rewards expire? Yes, vouchers typically expire 30 days after issuance. Check the expiration date in your rewards dashboard and claim before it expires. ### Can I transfer my reward to someone else? No, vouchers are tied to a specific wallet address and cannot be transferred. Only the designated recipient can claim. ### What if I miss the claim window? Expired vouchers cannot be claimed. However, if you were eligible in one window, you may be eligible in future distributions based on ongoing activity. ### Are rewards taxable? Rewards are considered income in most jurisdictions. Consult a tax professional for guidance specific to your situation. *** ## Trust and Verification ### On-Chain Transparency * All claims are recorded on Solana's blockchain * Vault balances are publicly visible * Anyone can verify claim transactions using block explorers ### Signature Authority * Only vouchers signed by JustPump's authorized backend key are valid * The public key is published and verifiable * Prevents unauthorized withdrawals from the vault ### Historical Data Track historical distributions: * Total rewards distributed * Number of claimants * Average reward amounts * Distribution frequency Transparency is core to JustPump's mission. All reward mechanics are designed to be auditable and fair. *** ## Maximizing Your Rewards ### Stay Active * Trade regularly across multiple tokens * Participate in new token launches * Engage with community events ### Monitor Eligibility Windows * Check the platform regularly for distribution announcements * Follow JustPump on social media for updates * Enable notifications (if available) ### Claim Promptly * Don't let vouchers expire * Claim early to avoid last-minute issues * Keep a small SOL balance for transaction fees *** ## Learn More Detailed explanation of the insurance mechanism and eligibility See how trading fees fund the Airdrop and Insurance vaults *** ## Questions? Have questions about reward claims? Contact [support@justpump.fun](mailto:support@justpump.fun) or visit the [FAQ](/faq).