Add contracts verification script

README.md

@@ -28,3 +28,12 @@ Run:
 ```
 npx hardhat deploy --network <name>
 ```
+
+### Verify contracts
+
+```
+VOUCHER_UPGRADER_ADDRESS=<address> \
+VOUCHER_MANAGER_ADDRESS=<address> \
+VOUCHER_MINTER_ADDRESS=<address> \
+    npx hardhat run scripts/verify.ts --network <name>
+```

hardhat.config.ts

@@ -22,6 +22,7 @@ const config: HardhatUserConfig = {
             {
                 version: '0.8.27',
                 settings: {
+                    evmVersion: 'berlin',
                     /**
                      * Enable Intermediate Representation (IR) to reduce `Stack too deep` occurrences
                      * at compile time (e.g.: too many local variables in `matchOrdersBoost`).
@@ -94,6 +95,24 @@ const config: HardhatUserConfig = {
         pages: 'items',
         exclude: ['mocks', 'NonTransferableERC20Upgradeable.sol', 'beacon/VoucherProxy.sol'],
     },
+    etherscan: {
+        apiKey: {
+            '<network>': 'nothing', // hardhat-verify requires a non-empty string.
+        },
+        customChains: [
+            {
+                network: '<network>',
+                chainId: 0,
+                urls: {
+                    apiURL: '<url>',
+                    browserURL: '<url>',
+                },
+            },
+        ],
+    },
+    sourcify: {
+        enabled: false,
+    },
 };
 
 export default config;

scripts/verify.ts

@@ -0,0 +1,70 @@
+// SPDX-FileCopyrightText: 2024 IEXEC BLOCKCHAIN TECH <[email protected]>
+// SPDX-License-Identifier: Apache-2.0
+
+import hre, { deployments, ethers } from 'hardhat';
+import { UpgradeableBeacon__factory, VoucherHub__factory } from '../typechain-types';
+
+/**
+ * Note: When verifying a proxy contract, Hardhat-verify combined with Openzeppelin Upgrades
+ * plugin is "generally" able to automatically detect and verify the implementation contract.
+ * Here we explicitly verify the implementation because some issues have been observed.
+ */
+
+(async () => {
+    const upgraderAddress = process.env.VOUCHER_UPGRADER_ADDRESS || '';
+    const managerAddress = process.env.VOUCHER_MANAGER_ADDRESS || '';
+    const minterAddress = process.env.VOUCHER_MINTER_ADDRESS || '';
+
+    const voucherImplAddress = (await deployments.get('VoucherImpl')).address;
+    const voucherUpgradableBeaconAddress = (await deployments.get('VoucherUpgradeableBeacon'))
+        .address;
+    const voucherHubImplAddress = (await deployments.get('VoucherHubImpl')).address;
+    const voucherHubERC1967ProxyAddress = (await deployments.get('VoucherHubERC1967Proxy')).address;
+
+    const beaconInitialOwnerAddress = await UpgradeableBeacon__factory.connect(
+        voucherUpgradableBeaconAddress,
+        ethers.provider,
+    ).owner(); // Will not work if the owner was changed after deployment.
+    const voucherHub = VoucherHub__factory.connect(voucherHubERC1967ProxyAddress, ethers.provider);
+    const iexecPocoAddress = await voucherHub.getIexecPoco();
+
+    const contracts = [
+        {
+            name: 'VoucherImpl',
+            address: voucherImplAddress,
+            args: [],
+        },
+        {
+            name: 'VoucherUpgradeableBeacon',
+            address: voucherUpgradableBeaconAddress,
+            args: [[voucherImplAddress, beaconInitialOwnerAddress]],
+        },
+        {
+            name: 'VoucherHubImpl',
+            address: voucherHubImplAddress,
+            args: [],
+        },
+        {
+            name: 'VoucherHubERC1967Proxy',
+            address: voucherHubERC1967ProxyAddress,
+            args: [
+                voucherHubImplAddress,
+                VoucherHub__factory.createInterface().encodeFunctionData('initialize', [
+                    upgraderAddress,
+                    managerAddress,
+                    minterAddress,
+                    iexecPocoAddress,
+                    voucherUpgradableBeaconAddress,
+                ]),
+            ],
+        },
+    ];
+
+    for (const contract of contracts) {
+        console.log(`<> Verifying ${contract.name}`);
+        await hre.run('verify:verify', {
+            address: contract.address,
+            constructorArguments: contract.args,
+        });
+    }
+})().catch((error) => console.log(error));

scripts/voucherHubUtils.ts

@@ -94,6 +94,6 @@ export async function getExpectedVoucherProxyCodeHash(voucherBeaconAddress: stri
          * Note: Look very carefully before updating this value to avoid messing with
          * existing vouchers already deployed in production.
          */
-        return '0x386d2735c0e7b2144a00e43bc5451acd8063573f30f1edc7b8e8891039cbd84f';
+        return '0xba1aec6240a4c35e4711b8ed9013b7204c7d65e1caa6f364b3793946146e8aaf';
     }
 }