Supplementary Information

Vaultka (Solana) Website:

https://solana.vaultka.com/

Smart Contracts

Contract	Address
SOL Lending	DMhoXyVNpCFeCEfEjEQfS6gzAEcPUUSXM8Xnd2UXJfiS
Leverage jupSOL	FRyGij76xTvAg1nPPTaXHfa3QxUfZuKARuAyAaMyoLPo
Leverage JitoSOL	9p5Sc5SvR8QpJCQV3U4q6zVUTupr4Tr9Jmf48sbcSjtX

Fees

Fees Type	Amount
Management Fees (for Leverage)	15% of APR before distribution to leverage user & lending
Management Fees (for Lending)	0%
Withdrawal Fees (For both Leverage)	0.2%
Withdrawal Fees (For both Lending)	0%

*No deposit fee will be charged

Reward Split Ratio:

An increasing reward split will be implemented with a higher leverage size. As lenders pay zero initial borrowing cost for their position, a higher reward split with a higher leveraged size compensates the lenders. The reward split ratio will increase linearly for 2.5% for each leverage size with a base split of 30%, up to 50% for 10x leverage.

Leverage Size	Reward Split Ratio
2x	30%
3x	32.5%
10x	50%

Liquidation Threshold

Liquidation threshold for leverage users is 95% of it’s Debt-to-value ratio. Positions will be liquidated when the liquidation threshold is met, safeguarding lender's capital. Read mor eabout Debt-to-value Ratio here.

Slippage Settings

A maximum of 0.5% slippage will be set for position opening and closing for leverage users. This is to ensure that during the swap of tokens, users will not lose too much value base on their leveraged deposit size.

Price Impact Settings

A maximum 1% price impact is applied to the entire leverage position. Note that any price impact will be fully covered by the borrower's collateral. If the price impact exceeds this threshold, the transaction will be reverted. In such cases, users can try reducing leverage or splitting positions into multiple transactions to lower the price impact per transaction.

Oracle

Vaultka integrates Pyth as the primary oracle to fetch real-time price data for key assets on Solana, including SOL, USDC, USDT, JitoSOL, JupSOL, and JLP. To safeguard against oracle manipulation, we also retrieve quote prices from Jupiter when performing swaps for positions opening or closing , adding an extra layer of protection for asset pricing.