feat: add hop protocol (#91)

artifacts/IHopBridge.json

@@ -0,0 +1,102 @@
+{
+  "_format": "hh-sol-artifact-1",
+  "contractName": "IHopBridge",
+  "sourceName": "src/bridges/interfaces/IHopBridge.sol",
+  "abi": [
+    {
+      "inputs": [
+        {
+          "internalType": "uint256",
+          "name": "chainId",
+          "type": "uint256"
+        },
+        {
+          "internalType": "address",
+          "name": "recipient",
+          "type": "address"
+        },
+        {
+          "internalType": "uint256",
+          "name": "amount",
+          "type": "uint256"
+        },
+        {
+          "internalType": "uint256",
+          "name": "amountOutMin",
+          "type": "uint256"
+        },
+        {
+          "internalType": "uint256",
+          "name": "deadline",
+          "type": "uint256"
+        },
+        {
+          "internalType": "address",
+          "name": "relayer",
+          "type": "address"
+        },
+        {
+          "internalType": "uint256",
+          "name": "relayerFee",
+          "type": "uint256"
+        }
+      ],
+      "name": "sendToL2",
+      "outputs": [],
+      "stateMutability": "payable",
+      "type": "function"
+    },
+    {
+      "inputs": [
+        {
+          "internalType": "uint256",
+          "name": "chainId",
+          "type": "uint256"
+        },
+        {
+          "internalType": "address",
+          "name": "recipient",
+          "type": "address"
+        },
+        {
+          "internalType": "uint256",
+          "name": "amount",
+          "type": "uint256"
+        },
+        {
+          "internalType": "uint256",
+          "name": "bonderFee",
+          "type": "uint256"
+        },
+        {
+          "internalType": "uint256",
+          "name": "amountOutMin",
+          "type": "uint256"
+        },
+        {
+          "internalType": "uint256",
+          "name": "deadline",
+          "type": "uint256"
+        },
+        {
+          "internalType": "uint256",
+          "name": "destinationAmountOutMin",
+          "type": "uint256"
+        },
+        {
+          "internalType": "uint256",
+          "name": "destinationDeadline",
+          "type": "uint256"
+        }
+      ],
+      "name": "swapAndSend",
+      "outputs": [],
+      "stateMutability": "payable",
+      "type": "function"
+    }
+  ],
+  "bytecode": "0x",
+  "deployedBytecode": "0x",
+  "linkReferences": {},
+  "deployedLinkReferences": {}
+}

config/hop.ts

@@ -0,0 +1,26 @@
+import { NetworkNames } from "../extensions/constants";
+
+const L1 = [
+  NetworkNames.Rinkeby,
+  NetworkNames.Goerli,
+  NetworkNames.Kovan,
+]
+
+const L2 = [
+  NetworkNames.Xdai,
+  NetworkNames.Optimism,
+  NetworkNames.Arbitrum,
+  NetworkNames.Matic,
+  NetworkNames.Mumbai,
+]
+
+export const HopConfig = Object.values(NetworkNames).reduce((obj, name) => {
+  if (L1.some(n => n === name)) {
+    obj[name] = 1;
+  } else if (L2.some(n => n === name)) {
+    obj[name] = 2;
+  }
+  return obj;
+}, {});
+
+HopConfig['hardhat'] = 1; // for testing purposes

deploy/206_deploy_hop_facet.ts

@@ -0,0 +1,47 @@
+import { DeployFunction } from 'hardhat-deploy/types';
+import { HardhatRuntimeEnvironment } from 'hardhat/types';
+import { addOrReplaceFacets } from '../utils/diamond';
+import { HopConfig } from '../config/hop';
+
+const func: DeployFunction = async function (hre: HardhatRuntimeEnvironment) {
+  const {
+    deployments: { deploy },
+    getNamedAccounts,
+    ethers,
+    network
+  } = hre;
+  const { from } = await getNamedAccounts();
+
+  if (!HopConfig[network.name]) {
+    throw new Error("No config for this network available: " + network.name);
+  }
+
+  await deploy('HopFacet', {
+    from,
+    log: true,
+  });
+
+  const diamond = await ethers.getContract('Diamond');
+  const hopFacet = await ethers.getContract("HopFacet");
+
+  const ABI = ['function initHop(uint256)'];
+  const iface = new hre.ethers.utils.Interface(ABI)
+
+  console.log('HopConfig', HopConfig[network.name]);
+
+  const initData = iface.encodeFunctionData('initHop', [
+    HopConfig[network.name]
+  ]);
+
+  await addOrReplaceFacets(
+    [hopFacet],
+    diamond.address,
+    hopFacet.address,
+    initData
+  );
+}
+
+func.tags = ['bridges', 'hop'];
+func.dependencies = ['init-facets'];
+
+export default func;

extensions/utils.ts

@@ -1,5 +1,7 @@
 import { HardhatUserConfig } from 'hardhat/config';
 import { NetworkNames, NETWORK_CONFIGS } from './constants';
+import * as dotenv from 'dotenv';
+dotenv.config();
 
 export function createConfigNetwork(
   networkName: NetworkNames,