# Contracts ## **Mainnet** | Contract Name | Contract Address | | --------------------------------- | --------------------------------------------------------------------------------------------------------------------- | | L1StandardBridgeProxy | [0x1adE86B9cc8a50Db747b7aaC32E8527d42c71fC1](https://etherscan.io/address/0x1adE86B9cc8a50Db747b7aaC32E8527d42c71fC1) | | L1ERC721BridgeProxy | [0xAFc9946b25e3e93208b7E2D477680C5B6e2952be](https://etherscan.io/address/0xAFc9946b25e3e93208b7E2D477680C5B6e2952be) | | L1CrossDomainMessengerProxy | [0x03D5bc58E7b7E13ba785F67AFA2d2fC49cB2BdF3](https://etherscan.io/address/0x03D5bc58E7b7E13ba785F67AFA2d2fC49cB2BdF3) | | OptimismPortalProxy | [0x39A90926306E11497EC5FE1C459910258B620edD](https://etherscan.io/address/0x39A90926306E11497EC5FE1C459910258B620edD) | | OptimismMintableERC20FactoryProxy | [0xB77d3ea899ef38c464e19F5A6CBc5a37187DC43c](https://etherscan.io/address/0xB77d3ea899ef38c464e19F5A6CBc5a37187DC43c) | | L2OutputOracleProxy | [0xdd80E05004f40815EaEf12ffeE69c2a8A5112aA5](https://etherscan.io/address/0xdd80E05004f40815EaEf12ffeE69c2a8A5112aA5) | | SystemConfigProxy | [0x94118F86eE37Fa4Fdb266CDab1e55B8F0D6959D9](https://etherscan.io/address/0x94118F86eE37Fa4Fdb266CDab1e55B8F0D6959D9) | | ProxyAdmin | [0x161aF05fA6BdA1c6E7Ee12839d470931bA796948](https://etherscan.io/address/0x161aF05fA6BdA1c6E7Ee12839d470931bA796948) | | AddressManager | [0x039A3B4AF85A91626f428b8B881603b6DD1f6C4C](https://etherscan.io/address/0x039A3B4AF85A91626f428b8B881603b6DD1f6C4C) | | ProxyAdminOwner | [0x2C73A1610EE822a8C2C21eddd455e725A3334c8C](https://etherscan.io/address/0x2C73A1610EE822a8C2C21eddd455e725A3334c8C) | | SystemConfigOwner | [0xd01De08Cc118Cc1a1b39c54c8b4ff02A8ADE63eE](https://etherscan.io/address/0xd01De08Cc118Cc1a1b39c54c8b4ff02A8ADE63eE) | | Guardian | [0xd01De08Cc118Cc1a1b39c54c8b4ff02A8ADE63eE](https://etherscan.io/address/0xd01De08Cc118Cc1a1b39c54c8b4ff02A8ADE63eE) | | Challenger | [0xd01De08Cc118Cc1a1b39c54c8b4ff02A8ADE63eE](https://etherscan.io/address/0xd01De08Cc118Cc1a1b39c54c8b4ff02A8ADE63eE) | ## **L2 Contract Addresses** | Contract Name | Contract Address | | ----------------------------- | ------------------------------------------------------------------------------------------------------------------------ | | L2ToL1MessagePasser | [0x4200000000000000000000000000000000000016](https://scan.optopia.ai/address/0x4200000000000000000000000000000000000016) | | L2CrossDomainMessenger | [0x4200000000000000000000000000000000000007](https://scan.optopia.ai/address/0x4200000000000000000000000000000000000007) | | L2StandardBridge | [0x4200000000000000000000000000000000000010](https://scan.optopia.ai/address/0x4200000000000000000000000000000000000010) | | L2ERC721Bridge | [0x4200000000000000000000000000000000000014](https://scan.optopia.ai/address/0x4200000000000000000000000000000000000014) | | SequencerFeeVault | [0x4200000000000000000000000000000000000011](https://scan.optopia.ai/address/0x4200000000000000000000000000000000000011) | | OptimismMintableERC20Factory | [0x4200000000000000000000000000000000000012](https://scan.optopia.ai/address/0x4200000000000000000000000000000000000012) | | OptimismMintableERC721Factory | [0x4200000000000000000000000000000000000017](https://scan.optopia.ai/address/0x4200000000000000000000000000000000000017) | | L1Block | [0x4200000000000000000000000000000000000015](https://scan.optopia.ai/address/0x4200000000000000000000000000000000000015) | | GasPriceOracle | [0x420000000000000000000000000000000000000F](https://scan.optopia.ai/address/0x420000000000000000000000000000000000000F) | | ProxyAdmin | [0x4200000000000000000000000000000000000018](https://scan.optopia.ai/address/0x4200000000000000000000000000000000000018) | | BaseFeeVault | [0x4200000000000000000000000000000000000019](https://scan.optopia.ai/address/0x4200000000000000000000000000000000000019) | | L1FeeVault | [0x420000000000000000000000000000000000001A](https://scan.optopia.ai/address/0x420000000000000000000000000000000000001A) | | GovernanceToken | [0x4200000000000000000000000000000000000042](https://scan.optopia.ai/address/0x4200000000000000000000000000000000000042) | | SchemaRegistry | [0x4200000000000000000000000000000000000020](https://scan.optopia.ai/address/0x4200000000000000000000000000000000000020) | | EAS | [0x4200000000000000000000000000000000000021](https://scan.optopia.ai/address/0x4200000000000000000000000000000000000021) | ## **Testnet** | Contract Name | Contract Address | | --------------------------------- | -------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- | | L1StandardBridgeProxy | [ ](https://scan-testnet.optopia.ai/address/0x4e8059f4Df6174a5a88376E4AA959B9E7f36F2c3)[0x4e8059f4Df6174a5a88376E4AA959B9E7f36F2c3](https://sepolia.etherscan.io/address/0x4e8059f4Df6174a5a88376E4AA959B9E7f36F2c3) | | L1ERC721BridgeProxy | [0xAFc9946b25e3e93208b7E2D477680C5B6e2952be](https://sepolia.etherscan.io/address/0xAFc9946b25e3e93208b7E2D477680C5B6e2952be) | | L1CrossDomainMessengerProxy | [0xD2CC19aA79397Cd641811Ea81F73bAc7145a8bA4](https://sepolia.etherscan.io/address/0xD2CC19aA79397Cd641811Ea81F73bAc7145a8bA4) | | OptimismPortalProxy | [0xEB2C00187B62418ED4A75135588b8962cB7CF5eA](https://sepolia.etherscan.io/address/0xEB2C00187B62418ED4A75135588b8962cB7CF5eA) | | OptimismMintableERC20FactoryProxy | [0xBD236135Bd746Af7EdDbe68D1eF8a058030BF2E0](https://sepolia.etherscan.io/address/0xBD236135Bd746Af7EdDbe68D1eF8a058030BF2E0) | | L2OutputOracleProxy | [0x2Bb77E889dd1F3dD252628eCc0a293436bAFBce3](https://sepolia.etherscan.io/address/0x2Bb77E889dd1F3dD252628eCc0a293436bAFBce3) | | SystemConfigProxy | [0x4d58Aa73d36E9D88f3b944530Eecb2F4b9bd0768](https://sepolia.etherscan.io/address/0x4d58Aa73d36E9D88f3b944530Eecb2F4b9bd0768) | | ProxyAdmin | [0x168A62c7617FE4e8CC19ff8f299C8a883b39D133](https://sepolia.etherscan.io/address/0x168A62c7617FE4e8CC19ff8f299C8a883b39D133) | | AddressManager | [0x77952A7F4EF44411680741559973Cb055e14D9a3](https://sepolia.etherscan.io/address/0x77952A7F4EF44411680741559973Cb055e14D9a3) | | SystemConfigOwner | [0x63980fE64C01A7Be2C98BC8AE9A852772F7Eab4c](https://sepolia.etherscan.io/address/0x63980fE64C01A7Be2C98BC8AE9A852772F7Eab4c) | | SystemConfigOwner | [0x560B0fDe42177442465A27b4cc14021f4781f49a](https://sepolia.etherscan.io/address/0x560B0fDe42177442465A27b4cc14021f4781f49a) | | Guardian | [0x560B0fDe42177442465A27b4cc14021f4781f49a](https://sepolia.etherscan.io/address/0x560B0fDe42177442465A27b4cc14021f4781f49a) | | Challenger | [0x560B0fDe42177442465A27b4cc14021f4781f49a](https://sepolia.etherscan.io/address/0x560B0fDe42177442465A27b4cc14021f4781f49a) | ## **L2 Contract Addresses** | Contract Name | Contract Address | | ---------------------------- | -------------------------------------------------------------------------------------------------------------------------------- | | L2ToL1MessagePasser | [0x4200000000000000000000000000000000000016](https://scan-testnet.optopia.ai/address/0x4200000000000000000000000000000000000016) | | L2CrossDomainMessenger | [0x4200000000000000000000000000000000000007](https://scan-testnet.optopia.ai/address/0x4200000000000000000000000000000000000007) | | L2StandardBridge | [0x4200000000000000000000000000000000000010](https://scan-testnet.optopia.ai/address/0x4200000000000000000000000000000000000010) | | L2ERC721Bridge | [0x4200000000000000000000000000000000000014](https://scan-testnet.optopia.ai/address/0x4200000000000000000000000000000000000014) | | SequencerFeeVault | [0x4200000000000000000000000000000000000011](https://scan-testnet.optopia.ai/address/0x4200000000000000000000000000000000000011) | | OptimismMintableERC20Factory | [0x4200000000000000000000000000000000000012](https://scan-testnet.optopia.ai/address/0x4200000000000000000000000000000000000012) | | L1Block | [0x4200000000000000000000000000000000000015](https://scan-testnet.optopia.ai/address/0x4200000000000000000000000000000000000015) | | GasPriceOracle | [0x420000000000000000000000000000000000000F](https://scan-testnet.optopia.ai/address/0x420000000000000000000000000000000000000F) | | ProxyAdmin | [0x4200000000000000000000000000000000000018](https://scan-testnet.optopia.ai/address/0x4200000000000000000000000000000000000018) | | BaseFeeVault | [0x4200000000000000000000000000000000000019](https://scan-testnet.optopia.ai/address/0x4200000000000000000000000000000000000019) | | L1FeeVault | [0x420000000000000000000000000000000000001A](https://scan-testnet.optopia.ai/address/0x420000000000000000000000000000000000001A) | | GovernanceToken | [0x4200000000000000000000000000000000000042](https://scan-testnet.optopia.ai/address/0x4200000000000000000000000000000000000042) | | SchemaRegistry | [0x4200000000000000000000000000000000000020](https://scan-testnet.optopia.ai/address/0x4200000000000000000000000000000000000020) | | EAS | [0x4200000000000000000000000000000000000021](https://scan-testnet.optopia.ai/address/0x4200000000000000000000000000000000000021) | --- # Agent Instructions: Querying This Documentation If you need additional information that is not directly available in this page, you can query the documentation dynamically by asking a question. Perform an HTTP GET request on the current page URL with the `ask` query parameter: ``` GET https://docs.optopia.ai/building/contracts.md?ask= ``` The question should be specific, self-contained, and written in natural language. The response will contain a direct answer to the question and relevant excerpts and sources from the documentation. Use this mechanism when the answer is not explicitly present in the current page, you need clarification or additional context, or you want to retrieve related documentation sections.