Fix gas report generation (#4824)

Co-authored-by: ernestognw <ernestognw@gmail.com>

.github/workflows/checks.yml

@@ -29,6 +29,9 @@ jobs:
     runs-on: ubuntu-latest
     env:
       FORCE_COLOR: 1
+      # Needed for "eth-gas-reporter" to produce a "gasReporterOutput.json" as documented in
+      # https://github.com/cgewecke/eth-gas-reporter/blob/v0.2.27/docs/gasReporterOutput.md
+      CI: true
       GAS: true
     steps:
       - uses: actions/checkout@v4

hardhat.config.js

@@ -22,12 +22,6 @@ const argv = require('yargs/yargs')()
       type: 'boolean',
       default: false,
     },
-    gasReport: {
-      alias: 'enableGasReportPath',
-      type: 'string',
-      implies: 'gas',
-      default: undefined,
-    },
     mode: {
       alias: 'compileMode',
       type: 'string',
@@ -55,10 +49,12 @@ const argv = require('yargs/yargs')()
     },
   }).argv;
 
-require('@nomicfoundation/hardhat-toolbox');
+require('@nomicfoundation/hardhat-chai-matchers');
 require('@nomicfoundation/hardhat-ethers');
-require('hardhat-ignore-warnings');
 require('hardhat-exposed');
+require('hardhat-gas-reporter');
+require('hardhat-ignore-warnings');
+require('solidity-coverage');
 require('solidity-docgen');
 argv.foundry && require('@nomicfoundation/hardhat-foundry');
 
@@ -101,30 +97,22 @@ module.exports = {
   networks: {
     hardhat: {
       allowUnlimitedContractSize: !withOptimizations,
+      initialBaseFeePerGas: argv.coverage ? 0 : undefined,
     },
   },
   exposed: {
     imports: true,
     initializers: true,
     exclude: ['vendor/**/*'],
   },
-  docgen: require('./docs/config'),
-};
-
-if (argv.gas) {
-  require('hardhat-gas-reporter');
-  module.exports.gasReporter = {
+  gasReporter: {
+    enabled: argv.gas,
     showMethodSig: true,
     currency: 'USD',
-    outputFile: argv.gasReport,
     coinmarketcap: argv.coinmarketcap,
-  };
-}
-
-if (argv.coverage) {
-  require('solidity-coverage');
-  module.exports.networks.hardhat.initialBaseFeePerGas = 0;
-}
+  },
+  docgen: require('./docs/config'),
+};
 
 function hasFoundry() {
   return proc.spawnSync('forge', ['-V'], { stdio: 'ignore' }).error === undefined;