Staking

Accounts the program creates

Every account has an address derived from fixed seeds (a PDAProgram-derived address: an account address worked out from fixed words (seeds) and the program’s ID. Nobody holds a private key for it; only the program can sign for it.), so the page can find it from the pool admin and a number, and nobody can swap in a look-alike.

The stake vault and reward vault belong to the pool address, which only the program can sign for. Before and after every action the program checks that the vaults still hold at least the recorded stake and the unpaid rewards.

Who can do what

• ActionWho signsRules the program enforces
• Create a poolAny wallet; it becomes the pool adminBoth coins use the same token program, have no freeze authority and are not wrapped SOL. Stake and reward may be the same coin.
• Fund rewardsThe pool admin onlySomething must be staked. The deposit is split across stakes at that moment.
• StakeThe holderFrom the holder’s own token account into the stake vault. Adds to the same position.
• WithdrawThe holderUp to the holder’s own stake, back to an account the holder owns.
• ClaimThe holderWhole units of the holder’s own credited rewards, to an account the holder owns.
• Take anyone else’s coinsNobodyNo instruction lets the admin, VEYDUCT or anyone else move principal or sweep the reward reserve. There is no pause, rescue or close.

Being the pool admin does not prove you created the coin. Before staking in someone else’s pool, check the coin address and who the admin is.

Reward math, with a worked example

Amounts on chain are whole token units; 1 DEMO with 6 decimals is 1,000,000 units.

The pool keeps one number, the reward indexA running total of rewards per staked unit, scaled by 10¹². Your earnings are your stake × how much the index rose since your last action.: rewards per staked unit, multiplied by 10¹² so fractions are not lost. Funding raises it; each position remembers the index it last caught up to.

1. Funding raises the indexindex += deposit × 10¹² ÷ total stakedThe division rounds down. The leftover stays in the reward vault and is never paid out.
2. Each position catches up before it changescredit += your stake × (index − your checkpoint); checkpoint = indexThis runs on every stake, withdraw and claim, so a new stake only earns from later deposits.
3. Claims pay whole unitsclaim = credit ÷ 10¹²; credit keeps the remainderA fraction of a unit stays credited to you for next time.

Example

1. A stakes 600,000 and B stakes 400,000.Total staked: 1,000,000.
2. The admin funds 100,000.each staked unit earns 100,000 ÷ 1,000,000 = 0.1A can claim 60,000, B can claim 40,000.
3. C stakes 1,000,000.Total staked: 2,000,000. C earns nothing from the first deposit.
4. The admin funds 50,000.each staked unit earns 50,000 ÷ 2,000,000 = 0.025A: 60,000 + 15,000 = 75,000. B: 40,000 + 10,000 = 50,000. C: 25,000.

Run the same steps in Try it: it uses the program’s arithmetic and the page SDK’s accrual function, so you will see these numbers.

Costs

VEYDUCT fee to create a poolPaid once, in the same transaction, to VEYDUCT’s fee wallet. Shown in the review.

0.01 SOL

Account rent for a new poolPool (220 bytes) and two vaults, at mainnet rent of 5,080 lamports per byte plus 128 bytes per account.

≈ 0.0048 SOL (Token-2022) · 0.0047 SOL (classic)

Account rent for your positionOnce per wallet per pool, on your first stake.

≈ 0.0012 SOL

Network feePer transaction, one signature.

0.000005 SOL

Percentage feesStake, withdraw, claim and fund carry no VEYDUCT fee, and the program takes no cut.

None

RentSOL deposited into an account so Solana keeps storing it. It is normally returned when the account is closed. stays in the program’s accounts: the program has no instruction that closes a pool, vault or position, so it is not refunded. If your token account for the coin was closed, the page re-creates it in the same transaction and shows that rent (about 0.0015 SOL) in the review.

Lockups and withdrawals

• No lockup, cooldown or schedule. Withdraw any part of your stake at any time; the coins arrive in the same transaction.
• No promised yield. There is no APR. Rewards exist only when the admin deposits them.
• Withdrawing keeps your earned rewards. Your credit is brought up to date first and stays claimable after you withdraw everything.
• No compounding. Claimed rewards land in your wallet; stake them again if you want them to earn.

Edge cases and what can go wrong

FAQ