DEVREL-1052 feat: add tempo example to oft-alt example folder

.changeset/violet-parents-perform.md

@@ -0,0 +1,5 @@
+---
+"@layerzerolabs/oft-alt-example": minor
+---
+
+Feat: add better support for simple config and the latest tooling found in OFT and OFT-Solana

examples/oft-alt/.eslintrc.js

@@ -1,6 +1,7 @@
 require('@rushstack/eslint-patch/modern-module-resolution');
 
 module.exports = {
+    root: true,
     extends: ['@layerzerolabs/eslint-config-next/recommended'],
     rules: {
         // @layerzerolabs/eslint-config-next defines rules for turborepo-based projects

examples/oft-alt/contracts/MyOFT.sol

@@ -0,0 +1,17 @@
+// SPDX-License-Identifier: UNLICENSED
+pragma solidity ^0.8.22;
+
+import { Ownable } from "@openzeppelin/contracts/access/Ownable.sol";
+import { OFT } from "@layerzerolabs/oft-evm/contracts/OFT.sol";
+
+/// @notice Standard OFT for regular EVM chains (uses native gas for fees).
+/// @dev This contract is deployed on chains with standard EndpointV2 (not Alt).
+/// It connects to OFTAlt contracts on chains with Alt Endpoints.
+contract MyOFT is OFT {
+    constructor(
+        string memory _name,
+        string memory _symbol,
+        address _lzEndpoint,
+        address _delegate
+    ) OFT(_name, _symbol, _lzEndpoint, _delegate) Ownable(_delegate) {}
+}

examples/oft-alt/deploy/MyOFT.ts

@@ -0,0 +1,53 @@
+import assert from 'assert'
+
+import { type DeployFunction } from 'hardhat-deploy/types'
+
+const contractName = 'MyOFT'
+
+const deploy: DeployFunction = async (hre) => {
+    const { getNamedAccounts, deployments } = hre
+
+    const { deploy } = deployments
+    const { deployer } = await getNamedAccounts()
+
+    assert(deployer, 'Missing named deployer account')
+
+    console.log(`Network: ${hre.network.name}`)
+    console.log(`Deployer: ${deployer}`)
+
+    // This is an external deployment pulled in from @layerzerolabs/lz-evm-sdk-v2
+    //
+    // @layerzerolabs/toolbox-hardhat takes care of plugging in the external deployments
+    // from @layerzerolabs packages based on the configuration in your hardhat config
+    //
+    // For this to work correctly, your network config must define an eid property
+    // set to `EndpointId` as defined in @layerzerolabs/lz-definitions
+    //
+    // For example:
+    //
+    // networks: {
+    //   'optimism-testnet': {
+    //     ...
+    //     eid: EndpointId.OPTSEP_V2_TESTNET
+    //   }
+    // }
+    const endpointV2Deployment = await hre.deployments.get('EndpointV2')
+
+    const { address } = await deploy(contractName, {
+        from: deployer,
+        args: [
+            'MyOFT', // name
+            'MOFT', // symbol
+            endpointV2Deployment.address, // LayerZero's EndpointV2 address
+            deployer, // owner
+        ],
+        log: true,
+        skipIfAlreadyDeployed: false,
+    })
+
+    console.log(`Deployed contract: ${contractName}, network: ${hre.network.name}, address: ${address}`)
+}
+
+deploy.tags = [contractName]
+
+export default deploy

examples/oft-alt/hardhat.config.ts

@@ -14,6 +14,7 @@ import { HardhatUserConfig, HttpNetworkAccountsUserConfig } from 'hardhat/types'
 import { EndpointId } from '@layerzerolabs/lz-definitions'
 
 import './type-extensions'
+import './tasks/index'
 
 // Set your preferred authentication method
 //
@@ -54,16 +55,24 @@ const config: HardhatUserConfig = {
         ],
     },
     networks: {
+        // ========== STANDARD EVM CHAINS ==========
+        // These chains use standard EndpointV2 with native gas fee payment.
+        // Deploy MyOFT (standard OFT) on these chains.
         'arbitrum-sepolia': {
             eid: EndpointId.ARBSEP_V2_TESTNET,
             url: process.env.RPC_URL_ARB_SEPOLIA || 'https://arbitrum-sepolia.gateway.tenderly.co',
             accounts,
         },
-        'base-sepolia': {
-            eid: EndpointId.BASESEP_V2_TESTNET,
-            url: process.env.RPC_URL_BASE_SEPOLIA || 'https://base-sepolia.gateway.tenderly.co',
+
+        // ========== ALT ENDPOINT CHAINS ==========
+        // Chains with Alt Endpoints use ERC-20 tokens for fee payment instead of native gas.
+        // Deploy MyOFTAlt on these chains.
+        'tempo-testnet': {
+            eid: EndpointId.TEMPO_V2_TESTNET,
+            url: process.env.RPC_URL_TEMPO_TESTNET || 'https://rpc.testnet.tempo.xyz',
             accounts,
         },
+
         hardhat: {
             // Need this for testing because TestHelperOz5.sol is exceeding the compiled contract size limit
             allowUnlimitedContractSize: true,

examples/oft-alt/layerzero.config.ts

@@ -1,60 +1,94 @@
 import { EndpointId } from '@layerzerolabs/lz-definitions'
+import { ExecutorOptionType } from '@layerzerolabs/lz-v2-utilities'
+import { TwoWayConfig, generateConnectionsConfig } from '@layerzerolabs/metadata-tools'
+import { OAppEnforcedOption } from '@layerzerolabs/toolbox-hardhat'
 
-import type { OAppOmniGraphHardhat, OmniPointHardhat } from '@layerzerolabs/toolbox-hardhat'
+import type { OmniPointHardhat } from '@layerzerolabs/toolbox-hardhat'
 
-const sepoliaContract: OmniPointHardhat = {
-    eid: EndpointId.SEPOLIA_V2_TESTNET,
-    contractName: 'MyOFTAltAdapter',
-}
+// ======================================
+// SECTION 1: CONTRACT DEFINITIONS
+// ======================================
+// This example demonstrates the primary use case for OFTAlt:
+// Connecting an OFTAlt on a chain with an Alt Endpoint (ERC20 fee payment)
+// to standard OFT contracts on regular EVM chains (native gas fee payment).
+//
+// Primary scenario:
+// - OFTAlt deployed on Tempo (Alt Endpoint - fees paid in stablecoins)
+// - Standard OFT deployed on Arbitrum (regular EndpointV2 - fees paid in native gas)
 
-const fujiContract: OmniPointHardhat = {
-    eid: EndpointId.AVALANCHE_V2_TESTNET,
-    contractName: 'MyOFTAlt',
+// ========== ALT ENDPOINT CHAINS ==========
+// OFTAlt on chains with EndpointV2Alt (ERC20 fee payment)
+// Tempo is a payments-focused blockchain where fees are paid in TIP-20 stablecoins
+const tempoContract: OmniPointHardhat = {
+    eid: EndpointId.TEMPO_V2_TESTNET,
+    contractName: 'MyOFTAlt', // OFTAlt for Alt Endpoint chains (ERC20 fee payment)
 }
 
-const amoyContract: OmniPointHardhat = {
-    eid: EndpointId.AMOY_V2_TESTNET,
-    contractName: 'MyOFTAlt',
+// ========== STANDARD EVM CHAINS ==========
+// Standard OFT on chains with regular EndpointV2 (native gas fee payment)
+const arbitrumContract: OmniPointHardhat = {
+    eid: EndpointId.ARBSEP_V2_TESTNET,
+    contractName: 'MyOFT', // Standard OFT for regular EVM chains
 }
 
-const config: OAppOmniGraphHardhat = {
-    contracts: [
-        {
-            contract: fujiContract,
-        },
-        {
-            contract: sepoliaContract,
-        },
-        {
-            contract: amoyContract,
-        },
-    ],
-    connections: [
-        {
-            from: fujiContract,
-            to: sepoliaContract,
-        },
-        {
-            from: fujiContract,
-            to: amoyContract,
-        },
-        {
-            from: sepoliaContract,
-            to: fujiContract,
-        },
-        {
-            from: sepoliaContract,
-            to: amoyContract,
-        },
-        {
-            from: amoyContract,
-            to: sepoliaContract,
-        },
-        {
-            from: amoyContract,
-            to: fujiContract,
-        },
+// ======================================
+// SECTION 2: ENFORCED OPTIONS
+// ======================================
+// Define the gas options for destination chain execution.
+// These options ensure a minimum gas amount is provided for lzReceive execution.
+//
+// For production, profile your contract's lzReceive gas usage on each destination
+// chain and set appropriate values. The values below are examples.
+//
+// Learn more: https://docs.layerzero.network/v2/concepts/applications/oapp-standard#execution-options-and-enforced-settings
+
+const EVM_ENFORCED_OPTIONS: OAppEnforcedOption[] = [
+    {
+        msgType: 1, // SEND message type
+        optionType: ExecutorOptionType.LZ_RECEIVE,
+        gas: 80000, // Gas limit for lzReceive on destination
+        value: 0, // Native value to send (usually 0 for OFT)
+    },
+]
+
+// ======================================
+// SECTION 3: PATHWAY CONFIGURATION
+// ======================================
+// Define bidirectional pathways between contracts.
+// The Simple Config Generator automatically creates both directions (A→B and B→A).
+//
+// Each pathway specifies:
+// - Contract pair (source, destination)
+// - DVN configuration: [ [requiredDVNs], [optionalDVNs, threshold] ]
+// - Block confirmations: [A→B confirmations, B→A confirmations]
+// - Enforced options: [B's enforcedOptions, A's enforcedOptions]
+//
+// For production, configure appropriate DVNs for your security requirements.
+// See: https://docs.layerzero.network/v2/developers/evm/configuration/dvn-executor-config
+
+const pathways: TwoWayConfig[] = [
+    // Tempo (Alt Endpoint) <-> Arbitrum (Standard Endpoint)
+    // This demonstrates the primary use case: OFTAlt on Alt chain ↔ OFT on standard chain
+    [
+        tempoContract, // Alt Endpoint chain (OFTAlt with ERC20 fees)
+        arbitrumContract, // Standard chain (OFT with native gas fees)
+        [['LayerZero Labs'], []], // DVNs: Required=[LayerZero Labs], Optional=[]
+        [1, 1], // Block confirmations (increase for mainnet)
+        [EVM_ENFORCED_OPTIONS, EVM_ENFORCED_OPTIONS], // Enforced options
     ],
-}
+]
 
-export default config
+// ======================================
+// SECTION 4: EXPORT CONFIGURATION
+// ======================================
+// The generateConnectionsConfig function creates the full connection configuration
+// from the pathway definitions, including DVN addresses and executor settings
+// resolved from LayerZero metadata.
+
+export default async function () {
+    const connections = await generateConnectionsConfig(pathways)
+    return {
+        contracts: [{ contract: tempoContract }, { contract: arbitrumContract }],
+        connections,
+    }
+}

examples/oft-alt/package.json

@@ -22,22 +22,26 @@
   },
   "devDependencies": {
     "@babel/core": "^7.23.9",
+    "@layerzerolabs/devtools": "~2.0.4",
     "@layerzerolabs/devtools-evm-hardhat": "^4.0.4",
     "@layerzerolabs/eslint-config-next": "~2.3.39",
-    "@layerzerolabs/lz-definitions": "^3.0.12",
-    "@layerzerolabs/lz-evm-messagelib-v2": "^3.0.12",
-    "@layerzerolabs/lz-evm-protocol-v2": "^3.0.12",
-    "@layerzerolabs/lz-evm-v1-0.7": "^3.0.12",
-    "@layerzerolabs/lz-v2-utilities": "^3.0.12",
+    "@layerzerolabs/io-devtools": "~0.3.2",
+    "@layerzerolabs/lz-definitions": "^3.0.151",
+    "@layerzerolabs/lz-evm-messagelib-v2": "^3.0.148",
+    "@layerzerolabs/lz-evm-protocol-v2": "^3.0.148",
+    "@layerzerolabs/lz-evm-v1-0.7": "^3.0.148",
+    "@layerzerolabs/lz-v2-utilities": "^3.0.148",
+    "@layerzerolabs/metadata-tools": "^3.0.0",
     "@layerzerolabs/oapp-alt-evm": "^0.0.5",
     "@layerzerolabs/oapp-evm": "^0.4.1",
     "@layerzerolabs/oapp-evm-upgradeable": "^0.1.3",
     "@layerzerolabs/oft-alt-evm": "^0.0.5",
     "@layerzerolabs/oft-evm": "^4.0.1",
     "@layerzerolabs/prettier-config-next": "^2.3.39",
+    "@layerzerolabs/protocol-devtools-evm": "^5.0.2",
     "@layerzerolabs/solhint-config": "^3.0.12",
     "@layerzerolabs/test-devtools-evm-foundry": "~8.0.1",
-    "@layerzerolabs/toolbox-foundry": "~0.1.9",
+    "@layerzerolabs/toolbox-foundry": "~0.1.13",
     "@layerzerolabs/toolbox-hardhat": "~0.6.13",
     "@nomicfoundation/hardhat-ethers": "^3.0.5",
     "@nomiclabs/hardhat-ethers": "^2.2.3",