> ## Documentation Index
> Fetch the complete documentation index at: https://docs.abs.xyz/llms.txt
> Use this file to discover all available pages before exploring further.

# L1 Rollup Contracts

> Learn more about the smart contracts deployed on L1 that enable Abstract to inherit the security properties of Ethereum.

An essential part of Abstract as a [ZK rollup](/how-abstract-works/architecture/layer-2s#what-is-a-zk-rollup)
is the smart contracts deployed to Ethereum (L1) that store and verify information about the
state of the L2.

By having these smart contracts deployed and performing these essential
roles on the L1, Abstract inherits the security properties of Ethereum.

These smart contracts work together to:

* Store the state diffs and compressed contract bytecode published from the L2 using [blobs](https://info.etherscan.com/what-is-a-blob/).
* Receive and verify the validity proofs posted by the L2.
* Facilitate communication between L1 and L2 to enable cross-chain messaging and bridging.

## List of Abstract Contracts

Below is a list of the smart contracts that Abstract uses.

### L1 Contracts

#### Mainnet

| **Contract**                                         | **Address**                                                                                                           |
| ---------------------------------------------------- | --------------------------------------------------------------------------------------------------------------------- |
| L2 Operator (collects fees)                          | [0x459a5f1d4cfb01876d5022ae362c104034aabff9](https://etherscan.io/address/0x459a5f1d4cfb01876d5022ae362c104034aabff9) |
| L1 ETH Sender / Operator (Commits batches)           | [0x11805594be0229ef08429d775af0c55f7c4535de](https://etherscan.io/address/0x11805594be0229ef08429d775af0c55f7c4535de) |
| L1 ETH Sender / Operator (Prove and Execute batches) | [0x54ab716d465be3d5eeca64e63ac0048d7a81659a](https://etherscan.io/address/0x54ab716d465be3d5eeca64e63ac0048d7a81659a) |
| Governor Address (ChainAdmin owner)                  | [0x7F3EaB9ccf1d8B9705F7ede895d3b4aC1b631063](https://etherscan.io/address/0x7F3EaB9ccf1d8B9705F7ede895d3b4aC1b631063) |
| create2\_factory\_addr                               | [0xce0042b868300000d44a59004da54a005ffdcf9f](https://etherscan.io/address/0xce0042b868300000d44a59004da54a005ffdcf9f) |
| create2\_factory\_salt                               | `0x8c8c6108a96a14b59963a18367250dc2042dfe62da8767d72ffddb03f269ffcc`                                                  |
| BridgeHub Proxy Address                              | [0x303a465b659cbb0ab36ee643ea362c509eeb5213](https://etherscan.io/address/0x303a465b659cbb0ab36ee643ea362c509eeb5213) |
| State Transition Proxy Address                       | [0xc2ee6b6af7d616f6e27ce7f4a451aedc2b0f5f5c](https://etherscan.io/address/0xc2ee6b6af7d616f6e27ce7f4a451aedc2b0f5f5c) |
| Transparent Proxy Admin Address                      | [0xc2a36181fb524a6befe639afed37a67e77d62cf1](https://etherscan.io/address/0xc2a36181fb524a6befe639afed37a67e77d62cf1) |
| Validator Timelock Address                           | [0x5d8ba173dc6c3c90c8f7c04c9288bef5fdbad06e](https://etherscan.io/address/0x5d8ba173dc6c3c90c8f7c04c9288bef5fdbad06e) |
| ERC20 Bridge L1 Address                              | [0x57891966931eb4bb6fb81430e6ce0a03aabde063](https://etherscan.io/address/0x57891966931eb4bb6fb81430e6ce0a03aabde063) |
| Shared Bridge L1 Address                             | [0xd7f9f54194c633f36ccd5f3da84ad4a1c38cb2cb](https://etherscan.io/address/0xd7f9f54194c633f36ccd5f3da84ad4a1c38cb2cb) |
| Default Upgrade Address                              | [0x4d376798ba8f69ced59642c3ae8687c7457e855d](https://etherscan.io/address/0x4d376798ba8f69ced59642c3ae8687c7457e855d) |
| Diamond Proxy Address                                | [0x2EDc71E9991A962c7FE172212d1aA9E50480fBb9](https://etherscan.io/address/0x2EDc71E9991A962c7FE172212d1aA9E50480fBb9) |
| Multicall3 Address                                   | [0xca11bde05977b3631167028862be2a173976ca11](https://etherscan.io/address/0xca11bde05977b3631167028862be2a173976ca11) |
| Verifier Address                                     | [0x70f3fbf8a427155185ec90bed8a3434203de9604](https://etherscan.io/address/0x70f3fbf8a427155185ec90bed8a3434203de9604) |
| Chain Admin Address                                  | [0xA1f75f491f630037C4Ccaa2bFA22363CEC05a661](https://etherscan.io/address/0xA1f75f491f630037C4Ccaa2bFA22363CEC05a661) |

#### Testnet

| **Contract**                                         | **Address**                                                                                                                   |
| ---------------------------------------------------- | ----------------------------------------------------------------------------------------------------------------------------- |
| L1 ETH Sender / Operator (Commits batches)           | [0x564D33DE40b1af31aAa2B726Eaf9Dafbaf763577](https://sepolia.etherscan.io/address/0x564D33DE40b1af31aAa2B726Eaf9Dafbaf763577) |
| L1 ETH Sender / Operator (Prove and Execute batches) | [0xcf43bdB3115547833FFe4D33d864d25135012648](https://sepolia.etherscan.io/address/0xcf43bdB3115547833FFe4D33d864d25135012648) |
| Governor Address (ChainAdmin owner)                  | [0x397aa1340B514cB3EF8F474db72B7e62C9159C63](https://sepolia.etherscan.io/address/0x397aa1340B514cB3EF8F474db72B7e62C9159C63) |
| create2\_factory\_addr                               | [0xce0042b868300000d44a59004da54a005ffdcf9f](https://sepolia.etherscan.io/address/0xce0042b868300000d44a59004da54a005ffdcf9f) |
| create2\_factory\_salt                               | `0x8c8c6108a96a14b59963a18367250dc2042dfe62da8767d72ffddb03f269ffcc`                                                          |
| BridgeHub Proxy Address                              | [0x35a54c8c757806eb6820629bc82d90e056394c92](https://sepolia.etherscan.io/address/0x35a54c8c757806eb6820629bc82d90e056394c92) |
| State Transition Proxy Address                       | [0x4e39e90746a9ee410a8ce173c7b96d3afed444a5](https://sepolia.etherscan.io/address/0x4e39e90746a9ee410a8ce173c7b96d3afed444a5) |
| Transparent Proxy Admin Address                      | [0x0358baca94dcd7931b7ba7aaf8a5ac6090e143a5](https://sepolia.etherscan.io/address/0x0358baca94dcd7931b7ba7aaf8a5ac6090e143a5) |
| Validator Timelock Address                           | [0xd3876643180a79d0a56d0900c060528395f34453](https://sepolia.etherscan.io/address/0xd3876643180a79d0a56d0900c060528395f34453) |
| ERC20 Bridge L1 Address                              | [0x2ae09702f77a4940621572fbcdae2382d44a2cba](https://sepolia.etherscan.io/address/0x2ae09702f77a4940621572fbcdae2382d44a2cba) |
| Shared Bridge L1 Address                             | [0x3e8b2fe58675126ed30d0d12dea2a9bda72d18ae](https://sepolia.etherscan.io/address/0x3e8b2fe58675126ed30d0d12dea2a9bda72d18ae) |
| Default Upgrade Address                              | [0x27a7f18106281fe53d371958e8bc3f833694d24a](https://sepolia.etherscan.io/address/0x27a7f18106281fe53d371958e8bc3f833694d24a) |
| Diamond Proxy Address                                | [0x8ad52ff836a30f063df51a00c99518880b8b36ac](https://sepolia.etherscan.io/address/0x8ad52ff836a30f063df51a00c99518880b8b36ac) |
| Governance Address                                   | [0x15d049e3d24fbcd53129bf7781a0c6a506690ff2](https://sepolia.etherscan.io/address/0x15d049e3d24fbcd53129bf7781a0c6a506690ff2) |
| Multicall3 Address                                   | [0xca11bde05977b3631167028862be2a173976ca11](https://sepolia.etherscan.io/address/0xca11bde05977b3631167028862be2a173976ca11) |
| Verifier Address                                     | [0xac3a2dc46cea843f0a9d6554f8804aed18ff0795](https://sepolia.etherscan.io/address/0xac3a2dc46cea843f0a9d6554f8804aed18ff0795) |
| Chain Admin Address                                  | [0xEec1E1cFaaF993B3AbE9D5e78954f5691e719838](https://sepolia.etherscan.io/address/0xEec1E1cFaaF993B3AbE9D5e78954f5691e719838) |

### L2 Contracts

#### Mainnet

| **Contract**             | **Address**                                                                                                         |
| ------------------------ | ------------------------------------------------------------------------------------------------------------------- |
| ERC20 Bridge L2 Address  | [0x954ba8223a6BFEC1Cc3867139243A02BA0Bc66e4](https://abscan.org/address/0x954ba8223a6BFEC1Cc3867139243A02BA0Bc66e4) |
| Shared Bridge L2 Address | [0x954ba8223a6BFEC1Cc3867139243A02BA0Bc66e4](https://abscan.org/address/0x954ba8223a6BFEC1Cc3867139243A02BA0Bc66e4) |
| Default L2 Upgrader      | [0xd3A8626C3caf69e3287D94D43700DB25EEaCccf1](https://abscan.org/address/0xd3A8626C3caf69e3287D94D43700DB25EEaCccf1) |

#### Testnet

| **Contract**             | **Address**                                                                                                                 |
| ------------------------ | --------------------------------------------------------------------------------------------------------------------------- |
| ERC20 Bridge L2 Address  | [0xec089e40c40b12dd4577e0c5381d877b613040ec](https://sepolia.abscan.org/address/0xec089e40c40b12dd4577e0c5381d877b613040ec) |
| Shared Bridge L2 Address | [0xec089e40c40b12dd4577e0c5381d877b613040ec](https://sepolia.abscan.org/address/0xec089e40c40b12dd4577e0c5381d877b613040ec) |