strike-staking

Strike Staking

Strike Finance is a decentralised derivatives platform on Cardano, offering perpetual futures, options, and other structured products. The STRIKE token is the platform's governance and incentive token; holders can lock STRIKE into the protocol's staking contract to earn a share of trading-fee revenue paid out in ADA.

This tx3 covers the staking product specifically: locking STRIKE tokens to begin earning rewards, topping up an existing stake, and withdrawing both principal and accumulated rewards. The derivatives trading surface itself is not in scope.

Overview

When a user first stakes, the protocol mints a credential NFT pair — a tracker token (the staking position itself) plus an owner-identifier NFT keyed to the staker's payment key hash. Both tokens are locked together in the script UTxO; the owner NFT is not returned to the staker's wallet. Ownership is proven on subsequent spends by matching the required transaction signer against the owner_address_hash stored in the datum.

Top-ups (add_stake) preserve the credential NFTs in the new script output. Withdrawal (withdraw_stake) burns both the tracker and the owner NFT, releasing the STRIKE principal and accumulated ADA rewards back to the staker's wallet.

Transactions

Transaction	Description
stake	Lock STRIKE tokens and mint credential NFTs
add_stake	Add more STRIKE to an existing stake position
withdraw_stake	Reclaim all STRIKE + accumulated ADA rewards, burning credential NFTs

Important considerations

• Network profile required. The env block references on-chain addresses, policy IDs, and reference-script UTxOs that must be configured per network in the trix profile.
• Reference scripts. Both spend and mint validators are consumed via reference scripts (spend_script_ref, mint_script_ref). The referenced UTxOs must exist on-chain.
• Owner NFT stays in the script. Minted with the staker's payment key hash as the asset name and locked alongside the tracker token. add_stake preserves it; withdraw_stake burns it.
• Collateral. All transactions require 5 ADA collateral from the staker.
• Validity window. stake uses tip_slot() + 200.

Caller preparation

stake / add_stake

Parameter	Source
staked_at_time: Int	Current Unix time × 1000. tx3's slot_to_time() returns seconds, so milliseconds must be computed externally.

add_stake / withdraw_stake

Parameter	Source
staking_utxo: UtxoRef	The existing staking position UTxO; queried on-chain by looking up the tracker token at the spend script address.

References

• Smart contracts: PlutusV3 — strike-finance/staking-smart-contracts
• Homepage / app: strikefinance.org