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Merge branch 'main' into 0g-verifierproxy-fix
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‎src/config/sidebar.ts‎

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@@ -28,7 +28,7 @@ import chainlinkLocalV023Contents from "./sidebar/chainlink-local/api-reference/
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*/
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export type SectionContent = {
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title: string
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url: string
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url?: string
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highlightAsCurrent?: string[]
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children?: SectionContent[]
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isCollapsible?: boolean
@@ -1583,27 +1583,44 @@ export const SIDEBAR: Partial<Record<Sections, SectionEntry[]>> = {
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url: "ccip/tutorials/evm/cross-chain-tokens",
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children: [
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{
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title: "Deploy and Register Using Remix IDE",
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url: "ccip/tutorials/evm/cross-chain-tokens/register-from-eoa-remix",
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},
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{
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title: "Register from an EOA (Burn & Mint)",
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url: "ccip/tutorials/evm/cross-chain-tokens/register-from-eoa-burn-mint-hardhat",
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highlightAsCurrent: ["ccip/tutorials/evm/cross-chain-tokens/register-from-eoa-burn-mint-foundry"],
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},
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{
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title: "Register from an EOA (Lock & Mint)",
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url: "ccip/tutorials/evm/cross-chain-tokens/register-from-eoa-lock-mint-hardhat",
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highlightAsCurrent: ["ccip/tutorials/evm/cross-chain-tokens/register-from-eoa-lock-mint-foundry"],
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},
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{
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title: "Set Token Pool rate limits",
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url: "ccip/tutorials/evm/cross-chain-tokens/update-rate-limiters-hardhat",
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highlightAsCurrent: ["ccip/tutorials/evm/cross-chain-tokens/update-rate-limiters-foundry"],
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title: "Using Remix IDE",
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children: [
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{
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title: "Deploy and Register from an EOA",
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url: "ccip/tutorials/evm/cross-chain-tokens/register-from-eoa-remix",
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},
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],
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},
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{
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title: "Register from a Safe Smart Account (Burn & Mint)",
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url: "ccip/tutorials/evm/cross-chain-tokens/register-from-safe-burn-mint-hardhat",
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title: "Using Hardhat / Foundry",
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children: [
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{
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title: "Register from an EOA (Burn & Mint)",
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url: "ccip/tutorials/evm/cross-chain-tokens/register-from-eoa-burn-mint-hardhat",
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highlightAsCurrent: ["ccip/tutorials/evm/cross-chain-tokens/register-from-eoa-burn-mint-foundry"],
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},
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{
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title: "Register from an EOA (Lock & Mint)",
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url: "ccip/tutorials/evm/cross-chain-tokens/register-from-eoa-lock-mint-hardhat",
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highlightAsCurrent: ["ccip/tutorials/evm/cross-chain-tokens/register-from-eoa-lock-mint-foundry"],
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},
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{
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title: "Set Token Pool rate limits",
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url: "ccip/tutorials/evm/cross-chain-tokens/update-rate-limiters-hardhat",
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highlightAsCurrent: ["ccip/tutorials/evm/cross-chain-tokens/update-rate-limiters-foundry"],
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},
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{
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title: "Register from a Safe Smart Account (Burn & Mint)",
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url: "ccip/tutorials/evm/cross-chain-tokens/register-from-safe-burn-mint-hardhat",
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},
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{
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title: "Configure Additional Networks",
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url: "ccip/tutorials/evm/cross-chain-tokens/configure-additional-networks-hardhat",
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highlightAsCurrent: [
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"ccip/tutorials/evm/cross-chain-tokens/configure-additional-networks-foundry",
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],
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},
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],
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},
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],
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},

‎src/content/ccip/tutorials/evm/cross-chain-tokens/configure-additional-networks-foundry.mdx‎

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---
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section: ccip
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date: Last Modified
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title: "Add CCIP Networks for Cross-Chain Token Tutorials (Foundry)"
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metadata:
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description: "Add CCIP network support to test burn-mint and lock-mint token tutorials on additional blockchains. Configure network settings, RPC endpoints, and CCIP contract addresses in Foundry."
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excerpt: "burn-mint, lock-mint, token pools, CCIP networks, add network, Foundry configuration, cross-chain tokens, testnet, mainnet, RPC endpoints, CCIP Directory, EVM chains, network setup"
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image: "/images/ccip/CCIP_enabled_tokens_flowchart.jpg"
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datePublished: "2025-10-30"
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lastModified: "2025-10-30"
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estimatedTime: "5 minutes"
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difficulty: "beginner"
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---
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import { Aside, PageTabs } from "@components"
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<PageTabs
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pages={[
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{
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name: "Hardhat",
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url: "/ccip/tutorials/evm/cross-chain-tokens/configure-additional-networks-hardhat",
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icon: "/images/tutorial-icons/hardhat-icn.png",
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},
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{
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name: "Foundry",
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url: "/ccip/tutorials/evm/cross-chain-tokens/configure-additional-networks-foundry",
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icon: "/images/tutorial-icons/foundry-icn.png",
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},
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]}
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/>
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The [smart-contract-examples](https://github.com/smartcontractkit/smart-contract-examples/tree/main/ccip/cct/foundry) repository includes default configurations for common CCIP testnet networks. This guide shows how to add support for additional networks.
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## Add a Network
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Add the network configuration to [`script/HelperConfig.s.sol`](https://github.com/smartcontractkit/smart-contract-examples/blob/main/ccip/cct/foundry/script/HelperConfig.s.sol)
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```solidity
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// Rest of the code...
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constructor() {
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// Rest of the existing networks...
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else if (block.chainid == 11155420) {
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activeNetworkConfig = getOptimismSepoliaConfig();
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} else {
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revert("Unsupported network");
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}
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}
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// Rest of the existing network configurations...
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function getOptimismSepoliaConfig() public pure returns (NetworkConfig memory) {
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NetworkConfig memory optimismSepoliaConfig = NetworkConfig({
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chainSelector: 5224473277236331295,
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router: 0x114A20A10b43D4115e5aeef7345a1A71d2a60C57,
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rmnProxy: 0xb40A3109075965cc09E93719e33E748abf680dAe,
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tokenAdminRegistry: 0x1d702b1FA12F347f0921C722f9D9166F00DEB67A,
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registryModuleOwnerCustom: 0x49c4ba01dc6F5090f9df43Ab8F79449Db91A0CBB,
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link: 0xE4aB69C077896252FAFBD49EFD26B5D171A32410,
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confirmations: 2,
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nativeCurrencySymbol: "ETH"
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});
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return optimismSepoliaConfig;
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}
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function getNetworkConfig(uint256 chainId) public pure returns (NetworkConfig memory) {
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// Rest of the existing networks...
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else if (chainId == 11155420) {
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return getOptimismSepoliaConfig();
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} else {
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revert("Unsupported chain ID");
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}
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}
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```
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Set the RPC URL:
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```env
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RPC_URL_OPTIMISM_SEPOLIA="INSERT_YOUR_RPC_URL_HERE"
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```
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<Aside type="note" title="Note">
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You can obtain RPC URLs from [Alchemy](https://www.alchemy.com/), [Infura](https://www.infura.io/), or another node
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provider.
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</Aside>
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Save the `.env` file, then load the environment variable into the terminal session:
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```bash
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source .env
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```
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The network is now available in all Foundry commands using `--rpc-url $RPC_URL_OPTIMISM_SEPOLIA`.
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## Configuration Fields
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| Field | Required | Description | Source |
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| --------------------------- | -------- | ------------------------------------------------------------------ | ------------------------------------------------------------- |
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| `chainSelector` | Yes | CCIP identifier for the network | [CCIP Directory](/ccip/directory) |
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| `router` | Yes | CCIP Router contract address | [CCIP Directory](/ccip/directory) |
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| `rmnProxy` | Yes | RMN Proxy contract address | [CCIP Directory](/ccip/directory) |
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| `tokenAdminRegistry` | Yes | Token Admin Registry address | [CCIP Directory](/ccip/directory) |
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| `registryModuleOwnerCustom` | Yes | Registry Module Owner address | [CCIP Directory](/ccip/directory) |
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| `link` | Yes | LINK token contract address | [CCIP Directory](/ccip/directory) |
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| `confirmations` | No | Number of block confirmations before considering transaction final | Blockchain's finality characteristics and your risk tolerance |
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| `nativeCurrencySymbol` | No | Native gas token symbol (e.g., `"ETH"`, `"AVAX"`, `"POL"`) | Blockchain's official documentation |
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Find all CCIP addresses in the [CCIP Directory - Testnet](/ccip/directory/testnet) or [CCIP Directory - Mainnet](/ccip/directory/mainnet).
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## Test
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Deploy a token to verify the configuration:
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```bash
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forge script script/DeployToken.s.sol --rpc-url $RPC_URL_OPTIMISM_SEPOLIA --private-key $PRIVATE_KEY --broadcast
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```
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## Contract Verification (Optional)
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Most networks are natively supported. Add `--verify` when deploying:
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```bash
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forge script script/DeployToken.s.sol --rpc-url $RPC_URL_OPTIMISM_SEPOLIA --private-key $PRIVATE_KEY --broadcast --verify
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```
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For networks not in [Foundry's `StdChains.sol::StdChains::initializeStdChains()`](https://github.com/foundry-rs/forge-std/blob/master/src/StdChains.sol#L193) function, include the `--verifier`, `--verifier-url`, and `--verifier-api-key` flags together with `--verify` when deploying:
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```bash
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forge script script/DeployToken.s.sol --rpc-url $RPC_URL_CUSTOM_NETWORK --private-key $PRIVATE_KEY --broadcast --verify --verifier custom --verifier-url $CUSTOM_EXPLORER_API_URL --verifier-api-key $CUSTOM_EXPLORER_API_KEY
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```
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With [Etherscan API V2](https://docs.etherscan.io/introduction), a single `ETHERSCAN_API_KEY` works across all Etherscan-compatible networks.

‎src/content/ccip/tutorials/evm/cross-chain-tokens/configure-additional-networks-hardhat.mdx‎

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---
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section: ccip
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date: Last Modified
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title: "Add CCIP Networks for Cross-Chain Token Tutorials (Hardhat)"
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metadata:
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description: "Add CCIP network support to test burn-mint and lock-mint token tutorials on additional blockchains. Configure network settings, RPC endpoints, and CCIP contract addresses in Hardhat."
7+
excerpt: "burn-mint, lock-mint, token pools, CCIP networks, add network, Hardhat configuration, cross-chain tokens, testnet, mainnet, RPC endpoints, CCIP Directory, EVM chains, network setup"
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image: "/images/ccip/CCIP_enabled_tokens_flowchart.jpg"
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datePublished: "2025-10-30"
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lastModified: "2025-10-30"
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estimatedTime: "5 minutes"
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difficulty: "beginner"
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---
14+
15+
import { Aside, PageTabs } from "@components"
16+
17+
<PageTabs
18+
pages={[
19+
{
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name: "Hardhat",
21+
url: "/ccip/tutorials/evm/cross-chain-tokens/configure-additional-networks-hardhat",
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icon: "/images/tutorial-icons/hardhat-icn.png",
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},
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{
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name: "Foundry",
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url: "/ccip/tutorials/evm/cross-chain-tokens/configure-additional-networks-foundry",
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icon: "/images/tutorial-icons/foundry-icn.png",
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},
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]}
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/>
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The [smart-contract-examples](https://github.com/smartcontractkit/smart-contract-examples/tree/main/ccip/cct/hardhat) repository includes default configurations for common CCIP testnet networks. This guide shows how to add support for additional networks.
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## Add a Network
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Add the network configuration to [`config/networks.ts`](https://github.com/smartcontractkit/smart-contract-examples/blob/main/ccip/cct/hardhat/config/networks.ts):
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```typescript
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export const configData = {
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// ... existing networks
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optimismSepolia: {
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chainFamily: "evm",
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chainId: 11155420,
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chainSelector: "5224473277236331295",
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router: "0x114A20A10b43D4115e5aeef7345a1A71d2a60C57",
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rmnProxy: "0xb40A3109075965cc09E93719e33E748abf680dAe",
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tokenAdminRegistry: "0x1d702b1FA12F347f0921C722f9D9166F00DEB67A",
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registryModuleOwnerCustom: "0x49c4ba01dc6F5090f9df43Ab8F79449Db91A0CBB",
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link: "0xE4aB69C077896252FAFBD49EFD26B5D171A32410",
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confirmations: 2,
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nativeCurrencySymbol: "ETH",
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},
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}
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```
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Set the RPC URL:
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```bash
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npx env-enc set OPTIMISM_SEPOLIA_RPC_URL
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```
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<Aside type="note" title="Note">
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You can obtain RPC URLs from [Alchemy](https://www.alchemy.com/), [Infura](https://www.infura.io/), or another node
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provider.
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</Aside>
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The network is now available in all Hardhat tasks using `--network optimismSepolia`.
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**Environment variable naming**: The system converts network names from camelCase to SNAKE_CASE and adds `_RPC_URL`. Examples: `optimismSepolia` → `OPTIMISM_SEPOLIA_RPC_URL`, `avalancheFuji` → `AVALANCHE_FUJI_RPC_URL`.
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## Configuration Fields
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| Field | Required | Description | Source |
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| --------------------------- | -------- | ------------------------------------------------------------------------------ | -------------------------------------------------------------------------------------- |
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| `chainFamily` | Yes | Blockchain VM type: `"evm"` for Ethereum-compatible chains, `"svm"` for Solana | `config/types.ts` |
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| `chainId` | Yes | EVM chain ID | Blockchain's official documentation (preferred) or [ChainList](https://chainlist.org/) |
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| `chainSelector` | Yes | CCIP identifier for the network | [CCIP Directory](/ccip/directory) |
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| `router` | Yes | CCIP Router contract address | [CCIP Directory](/ccip/directory) |
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| `rmnProxy` | Yes | RMN Proxy contract address | [CCIP Directory](/ccip/directory) |
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| `tokenAdminRegistry` | Yes | Token Admin Registry address | [CCIP Directory](/ccip/directory) |
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| `registryModuleOwnerCustom` | Yes | Registry Module Owner address | [CCIP Directory](/ccip/directory) |
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| `link` | Yes | LINK token contract address | [CCIP Directory](/ccip/directory) |
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| `confirmations` | No | Number of block confirmations before considering transaction final | Blockchain's finality characteristics and your risk tolerance |
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| `nativeCurrencySymbol` | No | Native gas token symbol (e.g., `"ETH"`, `"AVAX"`, `"POL"`) | Blockchain's official documentation |
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Find all CCIP addresses in the [CCIP Directory - Testnet](/ccip/directory/testnet) or [CCIP Directory - Mainnet](/ccip/directory/mainnet).
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## Test
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Deploy a token to verify the configuration:
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```bash
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npx hardhat deployToken --name "Test Token" --symbol TEST --network optimismSepolia
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```
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## Contract Verification (Optional)
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Most networks are natively supported. Add `--verifycontract` when deploying:
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```bash
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npx hardhat deployToken --name "Test Token" --symbol TEST --network optimismSepolia --verifycontract
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```
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For networks not in [Hardhat's chain descriptors](https://github.com/NomicFoundation/hardhat/blob/main/v-next/hardhat/src/internal/builtin-plugins/network-manager/chain-descriptors.ts), add to `hardhat.config.ts`:
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```typescript
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chainDescriptors: {
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12345: {
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name: "New Network",
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chainType: "generic",
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blockExplorers: {
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etherscan: {
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name: "NewScan",
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url: "https://newscan.io",
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apiUrl: "https://api.newscan.io/api",
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},
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},
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},
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}
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```
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With [Etherscan API V2](https://docs.etherscan.io/introduction), a single `ETHERSCAN_API_KEY` works across all Etherscan-compatible networks.

‎src/content/ccip/tutorials/evm/cross-chain-tokens/index.mdx‎

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- [Register from a Safe (Burn & Mint)](/ccip/tutorials/evm/cross-chain-tokens/register-from-safe-burn-mint-hardhat): Learn how to register a cross-chain token with the **Burn & Mint** mechanism using a Safe Smart Account.
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- [Hardhat version](/ccip/tutorials/evm/cross-chain-tokens/register-from-safe-burn-mint-hardhat)
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- [Configure Additional Networks](/ccip/tutorials/evm/cross-chain-tokens/configure-additional-networks-hardhat): Learn how to configure your cross-chain tokens and pools to operate on additional networks beyond the initial setup.
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- [Hardhat version](/ccip/tutorials/evm/cross-chain-tokens/configure-additional-networks-hardhat)
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- [Foundry version](/ccip/tutorials/evm/cross-chain-tokens/configure-additional-networks-foundry)
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<CcipCommon callout="educationalDisclaimer" />

‎src/content/ccip/tutorials/evm/cross-chain-tokens/register-from-eoa-burn-mint-foundry.mdx‎

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image: "/images/ccip/CCIP_enabled_tokens_flowchart.jpg"
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excerpt: "Burn & Mint, Foundry, ERC-20, ERC20, token pools, admin, CCIP, validation"
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datePublished: "2024-10-29"
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lastModified: "2025-10-22"
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lastModified: "2025-10-30"
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estimatedTime: "40 minutes"
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difficulty: "intermediate"
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---
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RPC_URL_FUJI=<your_rpc_url_fuji>
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RPC_URL_ARBITRUM_SEPOLIA=<your_rpc_url_arbitrum_sepolia>
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ETHERSCAN_API_KEY=<your_etherscan_api_key>
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ARBISCAN_API_KEY=<your_arbiscan_api_key>
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```
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Variables to configure:
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- `PRIVATE_KEY`: The private key for your testnet wallet. If you use MetaMask, you can follow this [guide](https://support.metamask.io/managing-my-wallet/secret-recovery-phrase-and-private-keys/how-to-export-an-accounts-private-key/) to export your private key. **Note**: This key is required for signing transactions like token transfers.
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- `RPC_URL_FUJI`: The RPC URL for the Fuji testnet. You can get this from the [Alchemy](https://www.alchemy.com/) or [Infura](https://infura.io/) website.
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- `RPC_URL_ARBITRUM_SEPOLIA`: The RPC URL for the Arbitrum Sepolia testnet. You can get this from the [Alchemy](https://www.alchemy.com/) or [Infura](https://infura.io/) website.
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- `ETHERSCAN_API_KEY`: An API key from Etherscan to verify your contracts. You can obtain one from [Etherscan](https://docs.etherscan.io/getting-started/viewing-api-usage-statistics).
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- `ARBISCAN_API_KEY`: An API key from Arbiscan to verify your contracts on Arbitrum. See [this guide](https://docs.arbiscan.io/getting-started/viewing-api-usage-statistics) to get one from Arbiscan.
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1. **Load the environment variables** into the terminal session where you will run the commands:
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@@ -118,6 +116,12 @@ Before running the scripts, you can customize the `config.json` within the `scri
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**Note**: If you decide to change the chain IDs in the `remoteChains` section to use different networks, you will also need to update your `.env` file with the appropriate RPC URLs for those networks.
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<Aside type="note" title="Using Different Networks">
120+
This tutorial uses Avalanche Fuji and Arbitrum Sepolia by default. To test with other CCIP-supported networks, see
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[Add CCIP Networks for Cross-Chain Token
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Tutorials](/ccip/tutorials/evm/cross-chain-tokens/configure-additional-networks-foundry).
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</Aside>
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Example `config.json` file:
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```json

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