Add Sepolia / Base Sepolia support for Base cross-chain

cross-chain/base/.gitignore

@@ -10,8 +10,10 @@
 !/deployments/mainnet/
 !/deployments/base/
 !/deployments/baseGoerli/
+!/deployments/baseSepolia/
 
 # OZ
 /.openzeppelin/unknown-*.json
 !/.openzeppelin/unknown-84531.json
 !/.openzeppelin/unknown-8453.json
+!/.openzeppelin/unknown-84532.json

cross-chain/base/README.adoc

@@ -42,7 +42,8 @@ yarn deploy --network <network>
 
 Supported networks:
 - `hardhat` - for local development
-- `baseGoerli` - L2 testing network
+- `baseGoerli` - L2 testing network (will become deprecated with end of 2023)
+- `baseSepolia` - L2 testing network
 - `base` - L2 mainnet
 
 Currently, this module does not deploy any contracts on L1. All the existing 
@@ -54,6 +55,6 @@ the contracts before running the deployment script. This command produces
 an `export.json` file containing contract deployment info. Note that for the
 chains other than `hardhat` the following environment variables are needed:
 
-- `L2_CHAIN_API_URL` - URL to access blockchain services, e.g. `https://goerli.base.org`
+- `L2_CHAIN_API_URL` - URL to access blockchain services, e.g. `https://sepolia.base.org`
 - `L2_ACCOUNTS_PRIVATE_KEYS` - Private keys for the deployer and council `<0xOwnerPrivKey,0xCouncilPrivKey>`
 - `BASESCAN_API_KEY` - Base Etherscan API key

cross-chain/base/deploy_l2/12_update_self_in_wormhole_gateway_mapping.ts

@@ -8,6 +8,8 @@ const func: DeployFunction = async function (hre: HardhatRuntimeEnvironment) {
 
   // See https://docs.wormhole.com/wormhole/blockchain-environments/evm#base
   // This ID is valid for both Base Goerli and Base Mainnet
+  // TODO: check if id is correct for Base Sepolia as well (once Wormhole
+  // supports that testnet)
   const wormholeChainID = 30
 
   const baseWormholeGateway = await deployments.get("BaseWormholeGateway")

cross-chain/base/hardhat.config.ts

@@ -44,6 +44,15 @@ const config: HardhatUserConfig = {
         : undefined,
       tags: ["etherscan"],
     },
+    sepolia: {
+      url: process.env.L1_CHAIN_API_URL || "",
+      chainId: 11155111,
+      deploy: ["deploy_l1"],
+      accounts: process.env.L1_ACCOUNTS_PRIVATE_KEYS
+        ? process.env.L1_ACCOUNTS_PRIVATE_KEYS.split(",")
+        : undefined,
+      tags: ["etherscan"],
+    },
     mainnet: {
       url: process.env.L1_CHAIN_API_URL || "",
       chainId: 1,
@@ -68,6 +77,21 @@ const config: HardhatUserConfig = {
       //   l1: "goerli",
       // },
     },
+    baseSepolia: {
+      url: process.env.L2_CHAIN_API_URL || "",
+      chainId: 84532,
+      deploy: ["deploy_l2"],
+      accounts: process.env.L2_ACCOUNTS_PRIVATE_KEYS
+        ? process.env.L2_ACCOUNTS_PRIVATE_KEYS.split(",")
+        : undefined,
+      tags: ["basescan"],
+      // In case of deployment failing with underpriced transaction error set
+      // the `gasPrice` parameter.
+      // gasPrice: 1000000000,
+      // companionNetworks: {
+      //   l1: "sepolia",
+      // },
+    },
     base: {
       url: process.env.L2_CHAIN_API_URL || "",
       chainId: 8453,
@@ -88,24 +112,30 @@ const config: HardhatUserConfig = {
   external: {
     deployments: {
       goerli: ["./external/goerli"],
+      sepolia: ["./external/sepolia"],
       mainnet: ["./external/mainnet"],
       baseGoerli: ["./external/baseGoerli"],
+      baseSepolia: ["./external/baseSepolia"],
       base: ["./external/base"],
     },
   },
 
   deploymentArtifactsExport: {
     goerli: "artifacts/l1",
+    sepolia: "artifacts/l1",
     mainnet: "artifacts/l1",
     baseGoerli: "artifacts/l2",
+    baseSepolia: "artifacts/l2",
     base: "artifacts/l2",
   },
 
   etherscan: {
     apiKey: {
       goerli: process.env.ETHERSCAN_API_KEY,
+      sepolia: process.env.ETHERSCAN_API_KEY,
       mainnet: process.env.ETHERSCAN_API_KEY,
       "base-goerli": process.env.BASESCAN_API_KEY,
+      "base-sepolia": process.env.BLOCKSCOUT_API_KEY,
       "base-mainnet": process.env.BASESCAN_API_KEY,
     },
     customChains: [
@@ -117,6 +147,14 @@ const config: HardhatUserConfig = {
           browserURL: "https://goerli.basescan.org",
         },
       },
+      {
+        network: "base-sepolia",
+        chainId: 84532,
+        urls: {
+          apiURL: "https://base-sepolia.blockscout.com/api",
+          browserURL: "https://base-sepolia.blockscout.com/",
+        },
+      },
       {
         network: "base-mainnet",
         chainId: 8453,
@@ -132,14 +170,18 @@ const config: HardhatUserConfig = {
     deployer: {
       default: 1,
       goerli: 0,
+      sepolia:0,
       baseGoerli: 0,
+      baseSepolia: 0,
       mainnet: "0x123694886DBf5Ac94DDA07135349534536D14cAf",
       base: "0x123694886DBf5Ac94DDA07135349534536D14cAf",
     },
     governance: {
       default: 2,
       goerli: 0,
+      sepolia:0,
       baseGoerli: 0,
+      baseSepolia: 0,
       mainnet: "0x9f6e831c8f8939dc0c830c6e492e7cef4f9c2f5f", // Threshold Council
       base: "0x518385dd31289F1000fE6382b0C65df4d1Cd3bfC", // Threshold Council
     },

cross-chain/base/package.json

@@ -31,6 +31,7 @@
     "lint:config:fix": "prettier --write '**/*.@(json|yaml)'",
     "prepack": "tsc -p tsconfig.export.json && hardhat export-artifacts export/artifacts",
     "export-artifacts:goerli": "yarn hardhat export-deployment-artifacts --network baseGoerli",
+    "export-artifacts:sepolia": "yarn hardhat export-deployment-artifacts --network baseSepolia",
     "export-artifacts:mainnet": "yarn hardhat export-deployment-artifacts --network base",
     "prepublishOnly": "npm run export-artifacts:$npm_config_network",
     "test": "hardhat test"