Crunchy Network

Aug 11, 2021

6 min read

Hello DeFi. Meet WTZ

Meet WTZ, a new FA2 compatible token, fully collateralized by XTZ, fully fungible, and oh so rewarding. DeFi, get ready.

Minting WTZ

The process of minting WTZ is simple and straightforward. A user submits XTZ to the WTZ swap contract and receives back an amount of WTZ according to the current swap ratio. This ratio starts at 1:1 and adjusts over time as baking rewards are accrued.

The XTZ deposit is equally distributed over a number of vaults, N. Each vault is delegated to a unique baker. The Crunchy DAO may propose and vote on vault delegations and changes. The WTZ V1 protocol allows for up to 10 XTZ vaults.

A user now has an FA2 compatible version of XTZ, ready for use in dapps and protocols across the ecosystem. Over time as the vaults receive baking rewards, the swap ratio will be adjusted, and when a user redeems WTZ for XTZ, they will receive back an amount of XTZ equal to the original amount + inflation from any accrued baking rewards.

And WTZ is fully fungible. Unlike other collateralized/wrapped XTZ, a user does not have a personal oven or vault. Anyone who holds WTZ can swap it back to XTZ at the current swap ratio. There is no slippage or loss of funds as there might be with trading through a DEX or AMM.

The Minting Process

Redeeming WTZ

Redemption is just as simple and straightforward as minting. A user submits any amount of WTZ they hold and receives back an amount of XTZ according to the current swap ratio. An equal amount of XTZ is retrieved from each vault in order to keep them balanced, and the WTZ the user turns in is permanently burned.

The amount of XTZ the user receives is equal to the original amount used to mint the WTZ+ inflation from any accrued baking rewards.

**Redemption Fee
There is a 0.4% redemption fee to prevent spamming the system or attempting to game rewards accrued in the vaults. The fee is split 50% to a dev fund — overseen by the Crunchy DAO — for ongoing maintenance and support, and 50% to the WTZ Rewards Vault (The rewards vault is distributed to users staking WTZ).

The Redemption Process

Understanding the Swap Ratio

The swap ratio starts at 1 WTZ: 1 XTZ (1:1)and fluctuates over time as vaults accrue baking rewards.

For instance, let’s assume the ratio is 1:1. Alice submits 100 XTZ to the swap contract and receives back 100 WTZ.

Some time passes, and the vaults accrue some baking rewards. Let’s assume all vaults have accrued rewards equal to 5% of the XTZ deposits. The new swap ratio is 1 WTZ: 1.05 XTZ.

Bob now submits 100 XTZ to the swap contract and receives back 95.238095 WTZ according to the current 1:1.05 ratio.

Alice also now redeems her 100 WTZ and receives back 105 XTZ under the 1:1.05 ratio. *(In reality Alice receives back 105 XTZ minus 0.4% or 104.58 XTZ because of the redemption fee)

Understanding the Swap Ratio

Oh So Rewarding

Remember, the “r” in WTZ stands for rewarding. So far we have learned how WTZ holders can be rewarded with accrued baking rewards. But there are other opportunities for increased yield and more rewards. Meet Asset Managers.

Asset Managers are external smart contracts that have power over the XTZ deposits in the vaults.

That sounds scary!

It is a bit scary. So we will take things slow and ensure that Asset Managers are well thought out, audited, tested, and trustworthy. Remember Asset Managers are smart contracts. Asset Managers will be nominated, voted on, and approved by the Crunchy DAO.

And Asset Managers can follow any arbitrary investment strategy. For instance an Asset Manager could lend XTZ to a lending protocol, participate in liquidity baking, or perhaps even take part in low risk farming or staking in order to increase the overall yield for WTZ holders.

Asset Managers will deposit the XTZ back to the XTZ vaults. Any additional XTZ returned will automatically be minted as WTZ and deposited to a Rewards Vault. Users who hold WTZ can then stake WTZ to earn the extra WTZ from in the Rewards Vault.

Staking WTZ will require a minimum time commitment, but also increases the amount of XTZ that Asset Managers are allowed to utilize.

**Asset Managers will not be utilized immediately. One will become active only if and when one is submitted that carefully reviewed and approved.

Q & A

All current wrapped XTZ tokens suffer the same problem — You have to have wrapped them in order to unwrap them. Meaning if you ever accumulate more than you personally wrapped — which is highly likely if they become widely used in DeFi — you can never unwrap them or unlock the full XTZ value. You could only do so through a DEX or AMM, which does not hold peg, and you suffer price slippage.

By contrast, WTZ is fully fungible and always swaps at full value, regardless of how much you want to swap. Unlike other collateralized/wrapped XTZ, a user does not have to have a personal oven or vault. Any user who holds WTZ can swap it back to XTZ at the current swap ratio, with no slippage or loss of funds.

While we cannot control what others do, it is our sincerest hope that the community embraces WTZ to its full potential. To that end, we hope and would ask any DEX or AMM which allows pairs with XTZ to block and not allow XTZ/WTZ pairs. Instead, allow it in the UI but route the swap through the WTZ contract.

Yes, we have spoken to some, and they are on board to use WTZ as the defacto “XTZ” token in their DEX. We are planning on discussing with the rest and hope that everyone comes to embrace WTZ as the XTZ of DeFi.

We have given this a lot of thought. The simple fact of the matter is the Crunchy brand is already well known, established, and trusted in the Tezos DeFi community. Launching this token under the Crunchy banner is an easy path to widespread adoption. And Crunchy is DeFi-as-a-Service, and WTZ fits nicely within that.

However, we are also careful and wish for max adoption. We are not taking any fees in CRUNCH, and have revised the original design which had swapping fees. Swapping is now free, except for the redemption fee which serves to prevent spam and bad actors. Plus 50% of the redemption fee goes directly back to WTZ users who are staking WTZ.

We will also be operating WTZ generally as a public good. For instance all contracts will be open source.

WTZ is currently deployed and anyone can swap XTZ for WTZ directly on Crunchy here!

DeFi as a Service Platform

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