The Open Network (TON)


Kiln currently offers single nominator contract type for TON staking. The minimum amount to stake with this flow with Kiln is 700k TON.

In the upcoming weeks Kiln will be offering Multiple Nominator Pool staking which will allow for users to stake up to a minimum of 10k TON.

Before staking TON please contact your Kiln CSM in order to set up the single nominator contracts.

Staking mechanics

Stake activation time

Next Epoch (18hs)

Stake lock-up time

One Epoch (18hs) + 9hs

Re-delegating activation time


Rewards frequency

First rewards: First epoch after funds where send to single nominator contract Rewards frequency: every epoch (18hs).



Minimum requirement

The protocol minimum currently sits at 354k TON. However as there are some voting fees and running a validator is expensive at Kiln we recommend a minimum of 700k TON per single nominator contract

Maximal optimal stake per pool

The optimal stake per pool is correlated to how the elector smart contract selects the validators and their effective stake. It currently works the following way:

  • For each epoch, the elector selects all the candidates of more than 300k TON

  • The elector orders all those candidates in descending order

  • If there are more candidates than the maximum possible (Currently 400) the elector trims the candidates in the lower end

  • All those 400 or fewer candidates will then enter the active set

  • A parameter called the max_factor outlines that the maximum effective stake can only be as high as the minimum stake that entered the active set multiplied by the max_factor. Currently, this max_factor is 3 and the minimum active stake for each epoch is usually seating around 354k TON making the maximum effective stake around 1.06M.

  • Usually, each pool holds a stake for even and odd epochs, holding space for 2.12M TON on each pool to still earn optimal rewards.

Active set

Yes (400 validators)


Yes, if validator is idle or behaves maliciously can get slashed.

Relationship between validator stake balance and rewards

Linear. The more stake balance there is on the validator, the more rewards it will earn, until 1M TON threshold where there are no additional rewards for additional TON. A new single nominator contract has to be deployed in this case.

Staking workflow

What is the staking process?

After the single nominator contract has been deployed the user can send funds to the contract

Do funds move out to another wallet?

Funds move to the single nominator contract which the user owns and can withdraw at any time.

Can I keep staking/unstaking from/to the same wallet?


Can I select how much of my wallet balance I want to stake?


How does auto-compounding work?

After every epoch the additional TON earned is used to generate additional rewards

How do I unstake?

You can unstake by withdrawing from the single nominator contract when the funds are not being used to validate

Can I unstake part of the staked balance?

Yes, you can select the amount of tokens you want to unstake

What is the slashing risk?

Downtime: During en epoch if a validator signed less than a certain threshold of the blocks, he will get slashed for 101 TON Double signing: Validator won't be able to validate for the epoch so it will get the downtime slashing

How is commission paid?

Commissions are invoiced to the customer as there is no commission dispatching on chain for the single nominator contract

Is the single nominator smart contract custodial?

No, this staking is 100% non custodial as the user holds the private key of the wallet that can withdraw from the single nominator contract. The validator can only "Borrow" the TON in order to valdiate and gives it back at the end of the epoch. At a protocol level there's no way a validator can use the funds for any other task

Staking guide

The Open Network (TON)

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