ethereum-optimism · krofax · Jul 18, 2025 · Jul 16, 2025 · Jul 16, 2025 · Jul 17, 2025
@@ -4,10 +4,10 @@ import tokenlist from '@eth-optimism/tokenlist'
 const explorers = {
   '1': 'https://etherscan.io',
   '5': 'https://goerli.etherscan.io',
-  '10': 'https://optimistic.etherscan.io',
+  '10': 'https://explorer.optimism.io',
   '420': 'https://goerli-optimism.etherscan.io',
   '11155111': 'https://sepolia.etherscan.io/',
-  '11155420': 'https://sepolia-optimism.etherscan.io/',
+  '11155420': 'https://testnet-explorer.optimism.io/',
 }
 
 export function TokenListTable({

@@ -50,5 +50,5 @@ You **must** deploy your bridge to OP Sepolia before it can be added to the Supe
 You can explore several examples of custom bridges for OP Mainnet:
 
 *   [NFT Bridge](https://github.com/ethereum-optimism/optimism/blob/v1.1.4/packages/contracts-bedrock/src/L1/L1ERC721Bridge.sol)
-*   [L2 DAI Token Bridge](https://optimistic.etherscan.io/address/0x467194771dae2967aef3ecbedd3bf9a310c76c65#code) and [deployed addresses](https://github.com/ethereum-optimism/ethereum-optimism.github.io/blob/master/data/DAI/data.json)
+*   [L2 DAI Token Bridge](https://explorer.optimism.io/address/0x467194771dae2967aef3ecbedd3bf9a310c76c65#code) and [deployed addresses](https://github.com/ethereum-optimism/ethereum-optimism.github.io/blob/master/data/DAI/data.json)
 *   [SNX Bridge](https://github.com/ethereum-optimism/ethereum-optimism.github.io/blob/master/data/SNX/data.json)
@@ -35,7 +35,7 @@ If you need ETH on OP Sepolia for testing purposes, [you can use this faucet](ht
 
 ## Interacting with contracts on OP Stack chains
 
-We have Hardhat's Greeter contract on OP Sepolia at address [0x9d334aFBa83865E67a9219830ADA57aaA9406681](https://sepolia-optimism.etherscan.io/address/0x9d334aFBa83865E67a9219830ADA57aaA9406681#code).
+We have Hardhat's Greeter contract on OP Sepolia at address [0x9d334aFBa83865E67a9219830ADA57aaA9406681](https://testnet-explorer.optimism.io/address/0x9d334aFBa83865E67a9219830ADA57aaA9406681#code).
 You can verify your development stack configuration by interacting with it.
 
 ## Development stacks

@@ -62,7 +62,7 @@ If you are already familiar with [building on the OP Stack](/stack/getting-start
 
   <Card title="Build Tools" href="/app-developers/tools/build" icon={<img src="/img/icons/shapes.svg" />} />
 
-  <Card title="OP Mainnet Explorer" href="https://optimistic.etherscan.io/" icon={<img src="/img/icons/shapes.svg" />} />
+  <Card title="OP Mainnet Explorer" href="https://explorer.optimism.io/" icon={<img src="/img/icons/shapes.svg" />} />
 </Cards>
 
 ## Data and dashboards

@@ -19,7 +19,7 @@
       },
       "block-explorer": {
         "title": "OP Mainnet explorer",
-        "href": "https://optimistic.etherscan.io/",
+        "href": "https://explorer.optimism.io/",
         "newWindow": true
       }
 }
@@ -43,7 +43,7 @@ Blockscout also has some OP-Mainnet-specific features:
 
 ## Etherscan
 
-We have Etherscan explorers for the [OP Mainnet](https://explorer.optimism.io) and the [OP Sepolia](https://sepolia-optimistic.etherscan.io/).
+We have Etherscan explorers for the [OP Mainnet](https://explorer.optimism.io) and the [OP Sepolia](https://testnet-explorer.optimism.io/).
 Etherscan has lots of tools to help you debug transactions.
 
 Optimistic Etherscan has all the tools you expect from Etherscan, such as:

@@ -62,7 +62,7 @@ It can also calculate the total cost of a transaction for you before you send it
 This contract is a predeploy at address `0x420000000000000000000000000000000000000F`:
 
 *   [On OP Mainnet](https://explorer.optimism.io/address/0x420000000000000000000000000000000000000F#readContract)
-*   [On OP Sepolia](https://sepolia-optimistic.etherscan.io/address/0x420000000000000000000000000000000000000F)
+*   [On OP Sepolia](https://testnet-explorer.optimism.io/address/0x420000000000000000000000000000000000000F)
 
 This is a push Oracle.
 OP Mainnet (and the testnets) updates the gas price parameters onchain whenever those parameters change.

@@ -61,7 +61,7 @@ You can use the [Superchain Faucet](https://console.optimism.io/faucet?utm_sourc
 ## Review the contracts
 You're about to use two contracts that have already been deployed to Sepolia and OP Sepolia, the `Greeter` contracts.
 You can review the source code for the L1 `Greeter` contract [here on Etherscan](https://sepolia.etherscan.io/address/0x31A6Dd971306bb72f2ffF771bF30b1B98dB8B2c5#code).
-You can review the source code for the L2 `Greeter` contract [here on Etherscan](https://sepolia-optimism.etherscan.io/address/0x5DE8a2957eddb140567fF90ba5d57bc9769f3055#code).
+You can review the source code for the L2 `Greeter` contract [here on Etherscan](https://testnet-explorer.optimism.io/address/0x5DE8a2957eddb140567fF90ba5d57bc9769f3055#code).
 Both contracts have exactly the same source code.
 
 Feel free to review the source code for these two contracts now if you'd like.
@@ -100,7 +100,7 @@ This same function can be used to wait for a message to be relayed from L1 to L2
 {<h3>Check the L2 Greeter</h3>}
 
 After a few minutes, you should see the greeting on the L2 `Greeter` contract change to the greeting you set.
-Open up the [L2 `Greeter` contract on OP Sepolia Etherscan](https://sepolia-optimism.etherscan.io/address/0x5DE8a2957eddb140567fF90ba5d57bc9769f3055#readContract) and click the "Read Contract" button.
+Open up the [L2 `Greeter` contract on OP Sepolia Etherscan](https://testnet-explorer.optimism.io/address/0x5DE8a2957eddb140567fF90ba5d57bc9769f3055#readContract) and click the "Read Contract" button.
 Paste your address into the field next to the "greeting" function and click the "Query" button.
 You should see the message you sent from L1.
 
@@ -124,7 +124,7 @@ You'll do this by sending two transactions on Sepolia, one proving transaction a
 {<h3>Connect to Etherscan</h3>}
 
 Just like before, sending a message to the L1 `Greeter` contract via the L2 `Greeter` contract requires that you call the `sendGreeting` function.
-Open up the [L2 `Greeter` contract on OP Sepolia Etherscan](https://sepolia-optimism.etherscan.io/address/0x5DE8a2957eddb140567fF90ba5d57bc9769f3055#writeContract) and click the "Connect to Web3" button.
+Open up the [L2 `Greeter` contract on OP Sepolia Etherscan](https://testnet-explorer.optimism.io/address/0x5DE8a2957eddb140567fF90ba5d57bc9769f3055#writeContract) and click the "Connect to Web3" button.
 
 {<h3>Send your greeting</h3>}
 

@@ -27,7 +27,7 @@ There are several OP Mainnet components with an RPC API, which are reviewed in t
 
 <Callout type="warning">
   Use [`eth_gasPrice`](https://ethereum.org/en/developers/docs/apis/json-rpc/#eth_gasprice) instead of `rollup_gasPrices` for the L2 gas price.
-  For the L1 gas price, you can call the [`GasPriceOracle`'s `l1BaseFee` function](https://optimistic.etherscan.io/address/0x420000000000000000000000000000000000000F#readProxyContract#F11).
+  For the L1 gas price, you can call the [`GasPriceOracle`'s `l1BaseFee` function](https://explorer.optimism.io/address/0x420000000000000000000000000000000000000F#readProxyContract#F11).
   If you want to estimate the cost of a transaction, you can [use the SDK](/app-developers/tutorials/transactions/sdk-estimate-costs).
 </Callout>
 

@@ -37,7 +37,7 @@ valid state root of the layer 2.
 There are two main ways to upgrade L1 contracts:
 
 *   [`op-deployer`](/stack/smart-contracts/op-deployer-upgrade): a simple tool to upgrade your contracts.
-*   [`superchain-ops`](/stack/smart-contracts/superchain-ops-guide): a workflow for chains that require security council signing or a more secure upgrade path. 
+*   [`superchain-ops`](/stack/smart-contracts/superchain-ops-guide): a workflow for chains that require security council signing or a more secure upgrade path.
 
 ### Official releases
 
@@ -309,7 +309,7 @@ future hardforks, not the activation of said hardforks.
 
 <Callout type="info">
   The Protocol Version only applies to the Protocol specifications with the
-  [Superchain Targets](https://specs.optimism.io/protocol/superchain-upgrades.html?utm_source=op-docs&utm_medium=docs#superchain-target)
+  [Superchain Targets](https://specs.optimism.io/protocol/superchain-upgrades.html?utm_source=op-docs\&utm_medium=docs#superchain-target)
   specified within. This versioning is independent of the Semver versioning
   used in OP Stack smart contracts, and the Semver-versioned reference software
   of the OP-Stack. This is an optional feature.
@@ -684,7 +684,7 @@ The `SchemaRegistry` predeploy implements the global attestation schemas for the
 *   **Deprecated:** no
 *   **Proxied:** yes
 
-The SchemaRegistry works alongside the Ethereum Attestation Service (EAS) to enable attestations. See [Build Decentralized Identity Apps with Attestations](https://community.optimism.io/identity/about-attestations?utm_source=op-docs&utm_medium=docs) for more details on schemas and usage.
+The SchemaRegistry works alongside the Ethereum Attestation Service (EAS) to enable attestations. See [Build Decentralized Identity Apps with Attestations](https://community.optimism.io/identity/about-attestations?utm_source=op-docs\&utm_medium=docs) for more details on schemas and usage.
 
 ### EAS (Ethereum Attestation Service)
 
@@ -701,10 +701,10 @@ The `EAS` predeploy implements the Ethereum Attestation Service protocol.
 
 EAS contracts are deployed on these networks:
 
-| Network    | Attestation Contract                                                                                                                   | Schema Registry Contract                                                                                                               |
-| ---------- | -------------------------------------------------------------------------------------------------------------------------------------- | -------------------------------------------------------------------------------------------------------------------------------------- |
-| OP Sepolia | [0x4200000000000000000000000000000000000021](https://sepolia-optimism.etherscan.io/address/0x4200000000000000000000000000000000000021) | [0x4200000000000000000000000000000000000020](https://sepolia-optimism.etherscan.io/address/0x4200000000000000000000000000000000000020) |
-| OP Mainnet | [0x4200000000000000000000000000000000000021](https://optimistic.etherscan.io/address/0x4200000000000000000000000000000000000021)       | [0x4200000000000000000000000000000000000020](https://optimistic.etherscan.io/address/0x4200000000000000000000000000000000000020)       |
+| Network    | Attestation Contract                                                                                                                  | Schema Registry Contract                                                                                                              |
+| ---------- | ------------------------------------------------------------------------------------------------------------------------------------- | ------------------------------------------------------------------------------------------------------------------------------------- |
+| OP Sepolia | [0x4200000000000000000000000000000000000021](https://testnet-explorer.optimism.io/address/0x4200000000000000000000000000000000000021) | [0x4200000000000000000000000000000000000020](https://testnet-explorer.optimism.io/address/0x4200000000000000000000000000000000000020) |
+| OP Mainnet | [0x4200000000000000000000000000000000000021](https://explorer.optimism.io/address/0x4200000000000000000000000000000000000021)         | [0x4200000000000000000000000000000000000020](https://explorer.optimism.io/address/0x4200000000000000000000000000000000000020)         |
 
 ### How to use EAS
 
@@ -728,7 +728,7 @@ Attestations made via EAS can be indexed through the following tools:
 *   [Ponder Graph](https://github.com/ethereum-attestation-service/eas-ponder-graph)
 *   [Open Source Indexer](https://github.com/ethereum-attestation-service/eas-indexing-service)
 
-For more information on working with attestations, see [Build Decentralized Identity Apps with Attestations](https://community.optimism.io/identity/about-attestations?utm_source=op-docs&utm_medium=docs).
+For more information on working with attestations, see [Build Decentralized Identity Apps with Attestations](https://community.optimism.io/identity/about-attestations?utm_source=op-docs\&utm_medium=docs).
 
 ### BeaconBlockRoot
 

@@ -46,7 +46,7 @@ Information is encapsulated in lower layer packets on the sending side and then
     It uses these parameters:
 
     *   `_to`, the destination address, is the messenger on the other side.
-        In the case of deposits, this is always [`0x4200000000000000000000000000000000000007`](https://sepolia-optimism.etherscan.io/address/0x4200000000000000000000000000000000000007).
+        In the case of deposits, this is always [`0x4200000000000000000000000000000000000007`](https://testnet-explorer.optimism.io/address/0x4200000000000000000000000000000000000007).
     *   `_gasLimit`, the gas limit.
         This value is calculated using [the `baseGas` function](https://github.com/ethereum-optimism/optimism/blob/62c7f3b05a70027b30054d4c8974f44000606fb7/packages/contracts-bedrock/contracts/universal/CrossDomainMessenger.sol#L442-L471).
     *   `_value`, the ETH that is sent with the message.
@@ -105,7 +105,7 @@ It is possible to replay a failed deposit, possibly with more gas.
   You'll send transactions on L1 that trigger actions on L2. Make sure you're using the correct RPC URLs for each step.
 </Callout>
 
-To see how replays work, you can use [this contract on OP Sepolia](https://sepolia-optimism.etherscan.io/address/0xEF60cF6C6D0C1c755be104843bb72CDa3D778630#code).
+To see how replays work, you can use [this contract on OP Sepolia](https://testnet-explorer.optimism.io/address/0xEF60cF6C6D0C1c755be104843bb72CDa3D778630#code).
 
 1.  Call `stopChanges`, using this Foundry command:
 
@@ -155,11 +155,11 @@ To see how replays work, you can use [this contract on OP Sepolia](https://sepol
 
     **Method A: Using Etherscan Internal Transactions**
 
-    Look in [the internal transactions of the destination contract](https://sepolia-optimism.etherscan.io/address/0xEF60cF6C6D0C1c755be104843bb72CDa3D778630#internaltx), and select the latest one that appears as a failure. It should be a call to `L2CrossDomainMessenger` at address `0x420...007`.
+    Look in [the internal transactions of the destination contract](https://testnet-explorer.optimism.io/address/0xEF60cF6C6D0C1c755be104843bb72CDa3D778630#internaltx), and select the latest one that appears as a failure. It should be a call to `L2CrossDomainMessenger` at address `0x420...007`.
 
     **Method B: Using Contract Events (if internal transactions aren't visible)**
 
-    If you can't see internal transactions on Etherscan, check the [L2CrossDomainMessenger contract events](https://sepolia-optimism.etherscan.io/address/0x4200000000000000000000000000000000000007#events) and look for `FailedRelayedMessage` events with your contract address.
+    If you can't see internal transactions on Etherscan, check the [L2CrossDomainMessenger contract events](https://testnet-explorer.optimism.io/address/0x4200000000000000000000000000000000000007#events) and look for `FailedRelayedMessage` events with your contract address.
 
     **Method C: Using cast to query failed messages**
 

@@ -33,7 +33,7 @@ This reference guide provides a listing of the different OP Stack networks and p
 | Network Name                | `OP Mainnet`                                                                             |
 | Chain ID                    | `10`                                                                                     |
 | Currency Symbol<sup>1</sup> | ETH                                                                                      |
-| Explorer                    | [https://optimistic.etherscan.io](https://optimistic.etherscan.io)                       |
+| Explorer                    | [https://explorer.optimism.io](https://explorer.optimism.io)                             |
 | Public RPC URL              | [https://mainnet.optimism.io](https://mainnet.optimism.io)                               |
 | Sequencer URL<sup>2</sup>   | [https://mainnet-sequencer.optimism.io](https://mainnet-sequencer.optimism.io)           |
 | Contract Addresses          | Refer to the [Contract Addresses page](/superchain/addresses#mainnet)                    |
@@ -49,7 +49,7 @@ This reference guide provides a listing of the different OP Stack networks and p
 | Network Name                | `OP Sepolia`                                                                               |
 | Chain ID                    | `11155420`                                                                                 |
 | Currency Symbol<sup>1</sup> | ETH                                                                                        |
-| Explorer                    | [https://sepolia-optimistic.etherscan.io](https://sepolia-optimistic.etherscan.io)         |
+| Explorer                    | [https://testnet-explorer.optimism.io](https://testnet-explorer.optimism.io)               |
 | Public RPC URL              | [https://sepolia.optimism.io](https://sepolia.optimism.io)                                 |
 | Sequencer URL<sup>2</sup>   | [https://sepolia-sequencer.optimism.io](https://sepolia-sequencer.optimism.io)             |
 | Contract Addresses          | Refer to the [Contract Addresses page](/superchain/addresses#testnet-sepolia)              |

@@ -70,8 +70,8 @@ The L2 Proxy Admin is an address that can be used to upgrade most OP Stack chain
   read the descriptions above for more details.
 </Callout> 
 
-*   **Optimism Governed Chains on Ethereum**: [`0x6B1BAE59D09fCcbdDB6C6cceb07B7279367C4E3b`](https://optimistic.etherscan.io/address/0x6B1BAE59D09fCcbdDB6C6cceb07B7279367C4E3b) 
-*   **Optimism Governed Chains on Sepolia:** [`0x2FC3ffc903729a0f03966b917003800B145F67F3`](https://sepolia-optimism.etherscan.io/address/0x2FC3ffc903729a0f03966b917003800B145F67F3)
+*   **Optimism Governed Chains on Ethereum**: [`0x6B1BAE59D09fCcbdDB6C6cceb07B7279367C4E3b`](https://explorer.optimism.io/address/0x6B1BAE59D09fCcbdDB6C6cceb07B7279367C4E3b) 
+*   **Optimism Governed Chains on Sepolia:** [`0x2FC3ffc903729a0f03966b917003800B145F67F3`](https://testnet-explorer.optimism.io/address/0x2FC3ffc903729a0f03966b917003800B145F67F3)
 
 
 ## System Config Owner
@@ -206,9 +206,9 @@ The Mint Manager Owner is an address that controls the [`MintManager`](https://g
 
 ### Mitigations
 
-*   Mint Manager Owner is a 3-of-5 [multisig](https://optimistic.etherscan.io/address/0x2a82ae142b2e62cb7d10b55e323acb1cab663a26#readProxyContract).
+*   Mint Manager Owner is a 3-of-5 [multisig](https://explorer.optimism.io/address/0x2a82ae142b2e62cb7d10b55e323acb1cab663a26#readProxyContract).
 
 ### Addresses
 
-*   **Ethereum**: [`0x2a82ae142b2e62cb7d10b55e323acb1cab663a26`](https://optimistic.etherscan.io/address/0x2a82ae142b2e62cb7d10b55e323acb1cab663a26)
-*   **Sepolia**: [`0x5c4e7ba1e219e47948e6e3f55019a647ba501005`](https://optimistic.etherscan.io/address/0x5c4e7ba1e219e47948e6e3f55019a647ba501005)
+*   **Ethereum**: [`0x2a82ae142b2e62cb7d10b55e323acb1cab663a26`](https://explorer.optimism.io/address/0x2a82ae142b2e62cb7d10b55e323acb1cab663a26)
+*   **Sepolia**: [`0x5c4e7ba1e219e47948e6e3f55019a647ba501005`](https://explorer.optimism.io/address/0x5c4e7ba1e219e47948e6e3f55019a647ba501005)