> For the complete documentation index, see [llms.txt](https://docs.originprotocol.com/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.originprotocol.com/registry/contracts/arm-registry/lido-steth-weth.md).

# Lido: stETH/WETH

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Docs: <https://docs.originprotocol.com/automated-redemption-manager-arm/steth-arm>
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<figure><img src="/files/NliLlW1cTWUSCzZKLqMO" alt="Lido ARM contract dependencies"><figcaption></figcaption></figure>

#### ARMs Contracts

<table><thead><tr><th width="230.2109375">Contract</th><th>Address</th></tr></thead><tbody><tr><td>Lido ARM </td><td><a href="https://etherscan.io/address/0x85b78aca6deae198fbf201c82daf6ca21942acc6#code">0x85B78AcA6Deae198fBF201c82DAF6Ca21942acc6</a></td></tr><tr><td>Morpho Market</td><td><a href="https://etherscan.io/address/0xB7CeFE4CB483Be80C2963D3D9Edb991e69ff39cf">0xB7CeFE4CB483Be80C2963D3D9Edb991e69ff39cf</a></td></tr><tr><td>Zapper</td><td><a href="https://etherscan.io/address/0x01F30B7358Ba51f637d1aa05D9b4A60f76DAD680">0x01F30B7358Ba51f637d1aa05D9b4A60f76DAD680</a></td></tr></tbody></table>

#### Third Party Contracts

<table><thead><tr><th width="229.76171875">Contract</th><th>Address</th></tr></thead><tbody><tr><td>Lido Withdrawal Queue</td><td><a href="https://etherscan.io/address/0x889edC2eDab5f40e902b864aD4d7AdE8E412F9B1">0x889edC2eDab5f40e902b864aD4d7AdE8E412F9B1</a></td></tr><tr><td>Morpho Vault: Yearn WETH ARM</td><td><a href="https://etherscan.io/address/0x3Dfe70B05657949A5dB340754aD664810ac63b21">0x3Dfe70B05657949A5dB340754aD664810ac63b21</a></td></tr><tr><td>Pendle ARM SY token</td><td><a href="https://etherscan.io/address/0xbcae2Eb1cc47F137D8B2D351B0E0ea8DdA4C6184">0xbcae2Eb1cc47F137D8B2D351B0E0ea8DdA4C6184</a></td></tr></tbody></table>

#### Operational Accounts

<table><thead><tr><th width="229.76171875">Contract</th><th>Address</th></tr></thead><tbody><tr><td>Owner</td><td><a href="https://etherscan.io/address/0x35918cDE7233F2dD33fA41ae3Cb6aE0e42E0e69F">0x35918cDE7233F2dD33fA41ae3Cb6aE0e42E0e69F</a></td></tr><tr><td>Operator</td><td><a href="https://etherscan.io/address/0x739212d5bAfE6AAC8Be49a60B7d003bD41DBf38b">0x739212d5bAfE6AAC8Be49a60B7d003bD41DBf38b</a></td></tr><tr><td>Fee Collector</td><td><a href="https://etherscan.io/address/0xBB077E716A5f1F1B63ed5244eBFf5214E50fec8c">0xBB077E716A5f1F1B63ed5244eBFf5214E50fec8c</a></td></tr></tbody></table>