Contract Addresses

A comprehensive list of L2 contract addresses for Base Mainnet and Base Testnet, including links to their respective blockchain explorers.

L2 Contract Addresses

Base Mainnet

Name	Address
WETH9	0x4200000000000000000000000000000000000006
L2CrossDomainMessenger	0x4200000000000000000000000000000000000007
L2StandardBridge	0x4200000000000000000000000000000000000010
SequencerFeeVault	0x4200000000000000000000000000000000000011
OptimismMintableERC20Factory	0xF10122D428B4bc8A9d050D06a2037259b4c4B83B
GasPriceOracle	0x420000000000000000000000000000000000000F
L1Block	0x4200000000000000000000000000000000000015
L2ToL1MessagePasser	0x4200000000000000000000000000000000000016
L2ERC721Bridge	0x4200000000000000000000000000000000000014
OptimismMintableERC721Factory	0x4200000000000000000000000000000000000017
ProxyAdmin	0x4200000000000000000000000000000000000018
BaseFeeVault	0x4200000000000000000000000000000000000019
L1FeeVault	0x420000000000000000000000000000000000001a
EAS	0x4200000000000000000000000000000000000021
EASSchemaRegistry	0x4200000000000000000000000000000000000020
LegacyERC20ETH	0xDeadDeAddeAddEAddeadDEaDDEAdDeaDDeAD0000

Base Testnet (Sepolia)

Name	Address
WETH9	0x4200000000000000000000000000000000000006
L2CrossDomainMessenger	0x4200000000000000000000000000000000000007
L2StandardBridge	0x4200000000000000000000000000000000000010
SequencerFeeVault	0x4200000000000000000000000000000000000011
OptimismMintableERC20Factory	0x4200000000000000000000000000000000000012
GasPriceOracle	0x420000000000000000000000000000000000000F
L1Block	0x4200000000000000000000000000000000000015
L2ToL1MessagePasser	0x4200000000000000000000000000000000000016
L2ERC721Bridge	0x4200000000000000000000000000000000000014
OptimismMintableERC721Factory	0x4200000000000000000000000000000000000017
ProxyAdmin	0x4200000000000000000000000000000000000018
BaseFeeVault	0x4200000000000000000000000000000000000019
L1FeeVault	0x420000000000000000000000000000000000001a
EAS	0x4200000000000000000000000000000000000021
EASSchemaRegistry	0x4200000000000000000000000000000000000020
LegacyERC20ETH	0xDeadDeAddeAddEAddeadDEaDDEAdDeaDDeAD0000

*L2 contract addresses are the same on both mainnet and testnet.

L1 Contract Addresses

Ethereum Mainnet

Name	Address
AddressManager	0x8EfB6B5c4767B09Dc9AA6Af4eAA89F749522BaE2
AnchorStateRegistryProxy	0x909f6cf47ed12f010A796527f562bFc26C7F4E72
DelayedWETHProxy (FDG)	0x2453c1216e49704d84ea98a4dacd95738f2fc8ec
DelayedWETHProxy (PDG)	0x64ae5250958cdeb83f6b61f913b5ac6ebe8efd4d
DisputeGameFactoryProxy	0x43edB88C4B80fDD2AdFF2412A7BebF9dF42cB40e
FaultDisputeGame	0xe4066890367BF8A51d58377431808083A01b1E0c
L1CrossDomainMessenger	0x866E82a600A1414e583f7F13623F1aC5d58b0Afa
L1ERC721Bridge	0x608d94945A64503E642E6370Ec598e519a2C1E53
L1StandardBridge	0x3154Cf16ccdb4C6d922629664174b904d80F2C35
MIPS	0x07BABE08EE4D07dBA236530183B24055535A7011
OptimismMintableERC20Factory	0x05cc379EBD9B30BbA19C6fA282AB29218EC61D84
OptimismPortal	0x49048044D57e1C92A77f79988d21Fa8fAF74E97e
PermissionedDisputeGame	0xe3803582fd5BCdc62720D2b80f35e8dDeA94e2ec
PreimageOracle	0x1fb8cdFc6831fc866Ed9C51aF8817Da5c287aDD3
ProxyAdmin	0x0475cBCAebd9CE8AfA5025828d5b98DFb67E059E
SystemConfig	0x73a79Fab69143498Ed3712e519A88a918e1f4072
SystemDictator	0x1fE3fdd1F0193Dd657C0a9AAC37314D6B479E557

Unneeded contract addresses

Certain contracts are mandatory according to the OP Stack SDK, despite not being utilized. For such contracts, you can simply assign the zero address:

• StateCommitmentChain
• CanonicalTransactionChain
• BondManager

Ethereum Testnet (Sepolia)

Name	Address
AddressManager	0x709c2B8ef4A9feFc629A8a2C1AF424Dc5BD6ad1B
AnchorStateRegistryProxy	0x2fF5cC82dBf333Ea30D8ee462178ab1707315355
DelayedWETHProxy (FDG)	0xd3683e4947A7769603Ab6418eC02f000CE3cF30b
DelayedWETHProxy (PDG)	0x32cE910d9C6c8F78dc6779c1499aB05F281A054e
DisputeGameFactoryProxy	0xd6E6dBf4F7EA0ac412fD8b65ED297e64BB7a06E1
FaultDisputeGame	0xf83157709129Bd03fB02e96950Be288E8c2c1c67
L1CrossDomainMessenger	0xC34855F4De64F1840e5686e64278da901e261f20
L1ERC721Bridge	0x21eFD066e581FA55Ef105170Cc04d74386a09190
L1StandardBridge	0xfd0Bf71F60660E2f608ed56e1659C450eB113120
L2OutputOracle	0x84457ca9D0163FbC4bbfe4Dfbb20ba46e48DF254
MIPS	0x07BABE08EE4D07dBA236530183B24055535A7011
OptimismMintableERC20Factory	0xb1efB9650aD6d0CC1ed3Ac4a0B7f1D5732696D37
OptimismPortal	0x49f53e41452C74589E85cA1677426Ba426459e85
PermissionedDisputeGame	0x5920bD6aB4c1b96bFd4Efc56EB6cf9b018e3bF4c
PreimageOracle	0x1fb8cdFc6831fc866Ed9C51aF8817Da5c287aDD3
ProxyAdmin	0x0389E59Aa0a41E4A413Ae70f0008e76CAA34b1F3
SystemConfig	0xf272670eb55e895584501d564AfEB048bEd26194

Base Admin Addresses

Base Mainnet

Admin Role	Address	Type of Key
Batch Sender	0x5050f69a9786f081509234f1a7f4684b5e5b76c9	EOA managed by Coinbase Technologies
Batch Inbox	0xff00000000000000000000000000000000008453	EOA (with no known private key)
Output Proposer	0x642229f238fb9de03374be34b0ed8d9de80752c5	EOA managed by Coinbase Technologies
Proxy Admin Owner (L1)	0x7bB41C3008B3f03FE483B28b8DB90e19Cf07595c	Gnosis Safe
Challenger	0x8Ca1E12404d16373Aef756179B185F27b2994F3a	EOA managed by Coinbase Technologies
System config owner	0x14536667Cd30e52C0b458BaACcB9faDA7046E056	Gnosis Safe
Guardian	0x09f7150D8c019BeF34450d6920f6B3608ceFdAf2	Gnosis Safe

Base Testnet (Sepolia)

Admin Role	Address	Type of Key
Batch Sender	0x6CDEbe940BC0F26850285cacA097C11c33103E47	EOA managed by Coinbase Technologies
Batch Inbox	0xff00000000000000000000000000000000084532	EOA (with no known private key)
Output Proposer	0x037637067c1DbE6d2430616d8f54Cb774Daa5999	EOA managed by Coinbase Technologies
Proxy Admin Owner (L1)	0x0fe884546476dDd290eC46318785046ef68a0BA9	Gnosis Safe
Challenger	0x8b8c52B04A38f10515C52670fcb23f3C4C44474F	EOA managed by Coinbase Technologies
System config owner	0x0fe884546476dDd290eC46318785046ef68a0BA9	Gnosis Safe
Guardian	0x7a50f00e8D05b95F98fE38d8BeE366a7324dCf7E	EOA managed by Coinbase Technologies