Add zrChain adapter

[zsrockk]

NOTE

Please enable "Allow edits by maintainers" while putting up the PR.

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• If you would like to add a volume adapter please submit the PR here.
• If you would like to add a liquidations adapter, please refer to this readme document for details.

1. Once your adapter has been merged, it takes time to show on the UI. If more than 24 hours have passed, please let us know in Discord.
2. Sorry, We no longer accept fetch adapter for new projects, we prefer the tvl to computed from blockchain data, if you have trouble with creating a the adapter, please hop onto our discord, we are happy to assist you.
3. Please fill the form below only if the PR is for listing a new protocol else it can be ignored/replaced with reason/details about the PR
4. For updating listing info It is a different repo, you can find your listing in this file: https://github.com/DefiLlama/defillama-server/blob/master/defi/src/protocols/data2.ts, you can edit it there and put up a PR
5. Do not edit/push package-lock.json file as part of your changes, we use lockfileVersion 2, and most use v1 and using that messes up our CI
6. No need to go to our discord and announce that you've created a PR, we monitor all PRs and will review it asap

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Name (to be shown on DefiLlama):

zenBTC

z##### Twitter Link:

https://x.com/zenBTC_Official/

List of audit links if any:

Website Link:

https://www.zenbtc.io/

Logo (High resolution, will be shown with rounded borders):

https://zenrock-public-images.s3.eu-west-1.amazonaws.com/zenBTC-logo.svg

Current TVL:

6.56 M

Treasury Addresses (if the protocol has treasury)

Chain:

zrChain

Coingecko ID (so your TVL can appear on Coingecko, leave empty if not listed): (https://api.coingecko.com/api/v3/coins/list)

https://www.coingecko.com/en/coins/zenrock-btc

Coinmarketcap ID (so your TVL can appear on Coinmarketcap, leave empty if not listed): (https://api.coinmarketcap.com/data-api/v3/map/all?listing_status=active,inactive,untracked&start=1&limit=10000)

Short Description (to be shown on DefiLlama):

zenBTC is a fully Bitcoin-backed token that allows you to earn a yield on your BTC across multiple blockchains without your Bitcoin ever leaving the BTC blockchain.

Token address and ticker if any:

zenBTC - 9hX59xHHnaZXLU6quvm5uGY2iDiT3jczaReHy6A6TYKw

Category (full list at https://defillama.com/categories) *Please choose only one:

Liquid Staking, Synthetics

Oracle Provider(s): Specify the oracle(s) used (e.g., Chainlink, Band, API3, TWAP, etc.):

Implementation Details: Briefly describe how the oracle is integrated into your project:

Documentation/Proof: Provide links to documentation or any other resources that verify the oracle's usage:

forkedFrom (Does your project originate from another project):

methodology (what is being counted as tvl, how is tvl being calculated):

Total amount of wrapped bitcoin plus accumulated yield. The exchange rate between zenbtc and btc increases as yield is being accumulated resulting in a higher price for zenbtc which will reflect the accumulated yield.

Github org/user (Optional, if your code is open source, we can track activity):

[llamabutler]

The adapter at projects/zrChain exports TVL:

zrchain                   6.56 M

total                    6.56 M 

[waynebruce0x]

can we count the collateral BTC held in the bitcoin wallets instead please

[g1nt0ki]

.

[zsrockk]

Tracking collateral by counting BTC in the wallets is possible in theory, but it's quite challenging and computationally expensive, especially as the number of users on chain grows over time.

Unlike a model with a fixed set of treasury addresses, each of our users gets their own unique zenBTC deposit address, managed by our decentralized MPC (dMPC) system. As a result, the total collateral is distributed across many individual addresses, which may also be periodically consolidated or moved.To compute the total collateral, we’d need to:

• Query our chain for all active zenBTC deposit addresses.
• Query a Bitcoin node for the balance of each of those addresses individually.

This process would become increasingly resource-intensive and slow as the number of addresses increases, which is why we currently rely on internal accounting and verifiable mappings between deposits and minted zenBTC instead.

[llamabutler]

The adapter at projects/zrChain exports TVL:

zrchain                   6.97 M

total                    6.97 M 

[waynebruce0x]

We'd still prefer to query the balances from bitcoin even if there are lots of addresses