Arbitrum chain information
Arbitrum public RPC endpoints
caution
- Unlike the RPC Urls, the Sequencer endpoints only support
eth_sendRawTransactionandeth_sendRawTransactionConditionalcalls. - Arbitrum public RPCs do not provide Websocket support.
- View the faucets for testnet Sepolia tokens on L2.
This section provides an overview of the available public RPC endpoints for different Arbitrum chains and necessary details to interact with them.
| Name | RPC Url(s) | Chain ID | Block explorer | Underlying chain | Tech stack | Sequencer feed URL | Sequencer endpoint⚠️ |
|---|---|---|---|---|---|---|---|
| Arbitrum One | https://arb1.arbitrum.io/rpc | 42161 | Arbiscan, Blockscout | Ethereum | Nitro (Rollup) | wss://arb1-feed.arbitrum.io/feed | https://arb1-sequencer.arbitrum.io/rpc |
| Arbitrum Nova | https://nova.arbitrum.io/rpc | 42170 | Arbiscan, Blockscout | Ethereum | Nitro (AnyTrust) | wss://nova-feed.arbitrum.io/feed | https://nova-sequencer.arbitrum.io/rpc |
| Arbitrum Sepolia (Testnet) | https://sepolia-rollup.arbitrum.io/rpc | 421614 | Arbiscan, Blockscout | Sepolia | Nitro (Rollup) | wss://sepolia-rollup.arbitrum.io/feed | https://sepolia-rollup-sequencer.arbitrum.io/rpc |
More RPC endpoints
More Arbitrum chain RPC endpoints can be found in Chain Connect: Arbitrum One and Arbitrum Nova.
Alternatively, to interact with public Arbitrum chains, you can rely on many of the same popular node providers that you are already using on Ethereum:
Third-party RPC providers
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| Provider | Arb One? | Arb Nova? | Arb Sepolia? | Websocket? | Stylus Tracing? |
|---|---|---|---|---|---|
| 1RPC | ✅ | ||||
| Alchemy | ✅ | ✅ | ✅ | ✅ | Available on paid plans |
| Allnodes | ✅ | ✅ | ✅ | ||
| All That Node | ✅ | ✅ | ✅ | ||
| Ankr | ✅ | ✅ | Available on paid plans | ||
| BlockPi | ✅ | ✅ | |||
| Chainbase | ✅ | ✅ | |||
| Chainnodes | ✅ | ||||
| Chainstack | ✅ | ✅ | Available on paid plans | ||
| dRPC | ✅ | ✅ | ✅ | ✅ | |
| GetBlock | ✅ | ✅ | |||
| Infura | ✅ | ✅ | ✅ | Enabled on request | |
| Lava | ✅ | ✅ | |||
| Moralis | ✅ | ||||
| Nirvana Labs | ✅ | ✅ | ✅ | ✅ | |
| NodeReal | ✅ | ✅ | |||
| NOWNodes | ✅ | ||||
| Pocket Network | ✅ | ||||
| PublicNode | ✅ | ✅ | ✅ | ||
| Quicknode | ✅ | ✅ | ✅ | ✅ | Testnet supported in free tier |
| Tenderly | ✅ | ✅ | ✅ | ✅ | Testnet supported in free tier |
| Unifra | ✅ | ||||
| Validation Cloud | ✅ | ✅ | ✅ | Testnet supported in free tier |
Chain parameters
| Param | Description | Arbitrum One | Arbitrum Nova | Arb Sepolia |
|---|---|---|---|---|
| Dispute window | Time for assertions to get confirmed during which validators can issue a challenge | 45818 blocks (~ 6.4 days ) | 45818 blocks (~ 6.4 days) | 20 blocks (~ 4.0 minutes) |
| Minimum bond amount | Amount of funds required for a validator to propose assertion on the parent chain | 3600 ETH | 1 ETH | 1 Sepolia ETH |
| Force-include period | Period after which a delayed message can be included into the inbox without any action from the Sequencer | 5760 blocks / 24 hours | 5760 blocks / 24 hours | 5760 blocks / 24 hours |
| Gas target | Target gas/sec, over which the congestion mechanism activates | See child chain gas fees | See child chain gas fees | See child chain gas fees |
| Gas price floor | Minimum gas price | 0.02 gwei | 0.02 gwei | 0.2 gwei |
| Block gas limit | Maximum amount of gas that all the transactions inside a block are allowed to consume | 32,000,000 | 32,000,000 | 32,000,000 |
Faucet list
| Name | Network | Tokens |
|---|---|---|
| PK910 PoW Faucet | Sepolia | Ethereum Sepolia |
| Faucet aggregator | Sepolia | Ethereum Sepolia, Arb Sepolia |
| Alchemy’s Sepolia Faucet | Sepolia | Ethereum Sepolia, Arb Sepolia |
| Infura's Sepolia Faucet | Sepolia | Ethereum Sepolia |
| ethfaucet.com | Sepolia | Arb Sepolia |
Arbitrum Smart Contract Addresses
The following information may be useful to those building on Arbitrum. We list the addresses of the smart contracts related to the protocol, the token bridge and precompiles of the different Arbitrum chains.
Protocol smart contracts
Core contracts
The following contracts are deployed on Ethereum (L1)
| Arbitrum One | Arbitrum Nova | Arbitrum Sepolia | |
|---|---|---|---|
| Rollup | 0x4DCe...Cfc0 | 0xE7E8...B7Bd | 0x042B...0Cf4 |
| Sequencer Inbox | 0x1c47...82B6 | 0x211E...c21b | 0x6c97...be0D |
| CoreProxyAdmin | 0x5547...2dbD | 0x71D7...7148 | 0x1ed7...0686 |
Cross-chain messaging contracts
The following contracts are deployed on Ethereum (L1)
| Arbitrum One | Arbitrum Nova | Arbitrum Sepolia | |
|---|---|---|---|
| Delayed Inbox | 0x4Dbd...AB3f | 0xc444...3949 | 0xaAe2...ae21 |
| Bridge | 0x8315...ed3a | 0xC1Eb...76Bd | 0x38f9...33a9 |
| Outbox | 0x0B98...4840 | 0xD4B8...cc58 | 0x65f0...B78F |
| Classic Outbox*** | 0x7607...1A40 0x667e...337a |
***Migrated Network Only
Fraud proof contracts
The following contracts are deployed on Ethereum (L1)
| Arbitrum One | Arbitrum Nova | Arbitrum Sepolia | |
|---|---|---|---|
| ChallengeManager | 0xA556...9fB0 | 0xFE66...A688 | 0xC60b...8B4C |
| OneStepProver0 | 0x35FB...F731 | 0x35FB...F731 | 0x3Fe7...1377 |
| OneStepProverMemory | 0xe0ba...C48b | 0xe0ba...C48b | 0x6268...ec2d |
| OneStepProverMath | 0xaB95...F921 | 0xaB95...F921 | 0x42f5...e8Fa |
| OneStepProverHostIo | 0xa07c...71Cf | 0xa07c...71Cf | 0xdB2c...C165 |
| OneStepProofEntry | 0x4397...42d6 | 0x4397...42d6 | 0xB9cf...AE80 |
Token bridge smart contracts
Core contracts
The following contracts are deployed on Ethereum (L1)
| Arbitrum One | Arbitrum Nova | Arbitrum Sepolia | |
|---|---|---|---|
| L1 Gateway Router | 0x72Ce...31ef | 0xC840...cD48 | 0xcE18...8264 |
| L1 ERC20 Gateway | 0xa3A7...0EeC | 0xB253...21bf | 0x902b...3aFF |
| L1 Arb-Custom Gateway | 0xcEe2...180d | 0x2312...232f | 0xba2F...40F3 |
| L1 Weth Gateway | 0xd920...e2db | 0xE4E2...0BaE | 0xA8aD...0e1E |
| L1 Weth | 0xC02a...6Cc2 | 0xC02a...6Cc2 | 0x7b79...E7f9 |
| L1 Proxy Admin | 0x9aD4...0aDa | 0xa8f7...e560 | 0xDBFC...44b0 |
The following contracts are deployed on the corresponding L2 chain
| Arbitrum One | Arbitrum Nova | Arbitrum Sepolia | |
|---|---|---|---|
| L2 Gateway Router | 0x5288...F933 | 0x2190...DFa8 | 0x9fDD...43C7 |
| L2 ERC20 Gateway | 0x09e9...1EEe | 0xcF9b...9257 | 0x6e24...b502 |
| L2 Arb-Custom Gateway | 0x0967...5562 | 0xbf54...51F4 | 0x8Ca1...42C5 |
| L2 Weth Gateway | 0x6c41...623B | 0x7626...D9eD | 0xCFB1...556D |
| L2 Weth | 0x82aF...Bab1 | 0x722E...5365 | 0x980B...7c73 |
| L2 Proxy Admin | 0xd570...2a86 | 0xada7...d92C | 0x715D...5FdF |
Precompiles
The following precompiles are deployed on every L2 chain and always have the same address
| Arbitrum One | Arbitrum Nova | Arbitrum Sepolia | |
|---|---|---|---|
| ArbAddressTable | 0x0000...0066 | 0x0000...0066 | 0x0000...0066 |
| ArbAggregator | 0x0000...006D | 0x0000...006D | 0x0000...006D |
| ArbFunctionTable | 0x0000...0068 | 0x0000...0068 | 0x0000...0068 |
| ArbGasInfo | 0x0000...006C | 0x0000...006C | 0x0000...006C |
| ArbInfo | 0x0000...0065 | 0x0000...0065 | 0x0000...0065 |
| ArbOwner | 0x0000...0070 | 0x0000...0070 | 0x0000...0070 |
| ArbOwnerPublic | 0x0000...006b | 0x0000...006b | 0x0000...006b |
| ArbRetryableTx | 0x0000...006E | 0x0000...006E | 0x0000...006E |
| ArbStatistics | 0x0000...006F | 0x0000...006F | 0x0000...006F |
| ArbSys | 0x0000...0064 | 0x0000...0064 | 0x0000...0064 |
| ArbWasm | 0x0000...0071 | 0x0000...0071 | 0x0000...0071 |
| ArbWasmCache | 0x0000...0072 | 0x0000...0072 | 0x0000...0072 |
| NodeInterface | 0x0000...00C8 | 0x0000...00C8 | 0x0000...00C8 |
Misc
The following contracts are deployed on the corresponding L2 chain
| Arbitrum One | Arbitrum Nova | Arbitrum Sepolia | |
|---|---|---|---|
| L2 Multicall | 0x842e...4EB2 | 0x5e1e...cB86 | 0xA115...d092 |