> ## 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.
# Cashback Vault
> Insurance mechanism to protect traders in high-risk environments
## What is the Cashback Vault?
The **Cashback Vault** is JustPump's insurance mechanism designed to protect traders in the high-risk memecoin environment. It provides a safety net by distributing funds to eligible users during claim windows.
The Cashback Vault is funded by 0.2% of every trade, accumulating over time to provide community protection.
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## How It's Funded
Every trade on JustPump contributes to the Cashback Vault:
* **Bonding Curve trades**: 0.2% of every trade goes to Insurance Fund
* **JustSwap trades**: 0.2% of every swap goes to Insurance Fund
* Funds accumulate in an on-chain vault account
* Distributions are triggered during claim windows
The vault balance grows continuously as trading activity increases across all tokens on the platform.
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## Who Is Eligible?
The Cashback Vault is designed to reward participation and provide protection during adverse events. Eligibility is typically based on:
### Trading Activity
Users who actively trade on JustPump may qualify for cashback during distribution windows. The backend tracks:
* Volume traded
* Number of transactions
* Participation across tokens
* Losses incurred on failed projects
### Proportional Distribution
Rewards are distributed proportionally based on:
* Your trading activity relative to others
* Your exposure to failed or rugged tokens
* Your participation during the eligibility period
Eligibility criteria are determined off-chain by the backend but payouts are fully on-chain and verifiable. Not all users will be eligible for every distribution.
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## How Claims Work
The Cashback Vault uses a **signed voucher system** to enable secure, user-initiated claims.
The backend analyzes trading activity and calculates claimable amounts for eligible users during each distribution window.
If you're eligible, the backend issues a **signed reward voucher** containing:
* Your wallet address
* Claimable amount
* Expiration timestamp
* Cryptographic signature for verification
You submit the voucher on-chain using the JustPump interface. The smart contract verifies the signature and transfers SOL directly from the vault to your wallet.
Each voucher can only be claimed once. The contract tracks claimed vouchers to prevent double-spending.
You pay the transaction fee for claiming (typically a few cents in SOL). Rewards are delivered instantly upon successful claim.
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## Design Principles
The Cashback Vault architecture follows these principles:
### Off-Chain Accounting, On-Chain Payouts
* **Off-chain**: Backend calculates eligibility and amounts based on complex criteria
* **On-chain**: All payouts are executed via smart contract with signature verification
* **Transparent**: Vault balance and claim transactions are publicly auditable
### User-Initiated Claims
* Users must actively claim their rewards—no automatic distributions
* This reduces gas costs and gives users control over timing
* Users only pay transaction fees when they choose to claim
### Minimal On-Chain Logic
* Smart contract only validates signatures and transfers funds
* Complex eligibility logic stays off-chain for flexibility
* Reduces attack surface and gas costs
### Anti-Abuse Protections
* Each voucher has an expiration date
* Signatures prevent unauthorized claims
* Replay protection prevents double-claiming
* Rate limiting may apply to prevent abuse
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## Cashback Vault Properties
0.2% of every trade contributes to the vault, ensuring continuous funding as the platform grows.
Rewards are proportional to user participation and exposure to failed projects—not random or favoritism-based.
You pay the small transaction fee to claim, keeping the system efficient and preventing spam claims.
Once you submit a valid voucher, SOL is transferred directly to your wallet in the same transaction.
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## Frequently Asked Questions
### Can I claim multiple times?
Yes, if you're eligible in multiple distribution windows, you can claim for each window separately. Each voucher represents a distinct claim.
### Why isn't my reward equal to my losses?
The Cashback Vault is not full insurance—it's a community protection mechanism. Rewards are proportional to your participation and the vault balance at distribution time. They may not cover 100% of losses.
### Why can't I claim yet?
Claims are only available during distribution windows when the backend has calculated eligibility. Check the JustPump interface for your eligibility status and upcoming distribution dates.
### How do I know the vault balance?
The vault is an on-chain account—you can view its balance using a Solana block explorer or through the JustPump interface.
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## Trust and Transparency
### Auditable
* Vault address is public and verifiable on-chain
* All claim transactions are recorded on Solana
* Anyone can track inflows (fees) and outflows (claims)
### Signature-Based Security
* Only vouchers signed by the authorized backend key can be claimed
* Signature verification happens on-chain
* Prevents unauthorized withdrawals
### No Admin Withdrawal
* The vault has no "admin withdrawal" function
* Funds can only be claimed via valid signed vouchers
* Protects against internal misuse
The Cashback Vault demonstrates JustPump's commitment to community protection. While it can't eliminate all risk, it provides a meaningful safety net funded by platform activity.
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## Learn More
Explore how the reward voucher system works in detail
See how the 0.2% insurance fee contributes to the vault