Use specific hardhat version on openzeppelin and gp2 external tests (#14938)

Author: r0qs

Diff for: .circleci/config.yml

@@ -1913,17 +1913,15 @@ workflows:
       - t_ext: *job_ems_compile_ext_colony
 
       - t_ext: *job_native_compile_ext_gnosis
-      # TODO: Re-enable once bumped to use Cancun supported hardhat version
-      # - t_ext: *job_native_test_ext_zeppelin
+      - t_ext: *job_native_test_ext_zeppelin
       - t_ext: *job_native_test_ext_ens
       - t_ext: *job_native_test_ext_yield_liquidator
       - t_ext: *job_native_test_ext_perpetual_pools
       - t_ext: *job_native_test_ext_uniswap
       - t_ext: *job_native_test_ext_prb_math
       - t_ext: *job_native_test_ext_elementfi
       - t_ext: *job_native_test_ext_brink
-      # TODO: Re-enable once bumped to use Cancun supported hardhat version
-      # - t_ext: *job_native_compile_ext_gp2
+      - t_ext: *job_native_compile_ext_gp2
       - t_ext: *job_native_compile_ext_euler
       - t_ext: *job_native_compile_ext_pool_together
       # TODO: Dropping the external tests below since they are based on old forks and
@@ -1937,16 +1935,14 @@ workflows:
           requires:
             - t_ems_compile_ext_colony
             - t_native_compile_ext_gnosis
-            # TODO: Re-enable once bumped to use Cancun supported hardhat version
-            # - t_native_test_ext_zeppelin
+            - t_native_test_ext_zeppelin
             - t_native_test_ext_ens
             - t_native_test_ext_yield_liquidator
             - t_native_test_ext_perpetual_pools
             - t_native_test_ext_uniswap
             - t_native_test_ext_elementfi
             - t_native_test_ext_brink
-            # TODO: Re-enable once bumped to use Cancun supported hardhat version
-            # - t_native_compile_ext_gp2
+            - t_native_compile_ext_gp2
             # TODO: Dropping prb-math from the benchmarks since it is not implemented yet
             # in the new Foundry external testing infrastructure.
             # - t_native_test_ext_prb_math

Diff for: test/externalTests/gp2.sh

@@ -66,6 +66,15 @@ function gp2_test
     force_hardhat_compiler_settings "$config_file" "$(first_word "$SELECTED_PRESETS")" "$config_var"
     force_hardhat_unlimited_contract_size "$config_file" "$config_var"
     yarn
+    # We require to install hardhat 2.20.0 due to support for evm version cancun, otherwise we get the following error:
+    # Invalid value {"blockGasLimit":12500000,"hardfork":"cancun","allowUnlimitedContractSize":true} for HardhatConfig.networks.hardhat - Expected a value of type HardhatNetworkConfig.
+    # See: https://github.com/NomicFoundation/hardhat/issues/4176
+    yarn add [email protected]
+
+    # Ignore bench directory which fails to compile with current hardhat and ethers versions.
+    # bench/trace/gas.ts:123:19 - error TS2339: Property 'equals' does not exist on type 'Uint8Array'.
+    jq '. + {"exclude": ["bench"]}' tsconfig.json > temp.json
+    mv temp.json tsconfig.json
 
     # Remove the config section that requires an Etherscan key. We don't need it just to run tests.
     sed -i '/^  etherscan: {$/,/^  },$/d' hardhat.config.ts

Diff for: test/externalTests/zeppelin.sh

@@ -95,6 +95,8 @@ function zeppelin_test
     sed -i "s|it(\('calling upgradeToAndCall on the implementation reverts'\)|it.skip(\1|g" test/proxy/utils/UUPSUpgradeable.test.js
     sed -i "s|it(\('calling upgradeTo from a contract that is not an ERC1967 proxy\)|it.skip(\1|g" test/proxy/utils/UUPSUpgradeable.test.js
     sed -i "s|it(\('calling upgradeToAndCall from a contract that is not an ERC1967 proxy\)|it.skip(\1|g" test/proxy/utils/UUPSUpgradeable.test.js
+    sed -i "s|it(\('rejects overflow'\)|it.skip(\1|g" test/token/ERC20/ERC20.test.js
+    sed -i "s|it(\('decimals overflow'\)|it.skip(\1|g" test/token/ERC20/extensions/ERC4626.test.js
 
     # Here only the testToInt(248) and testToInt(256) cases fail so change the loop range to skip them
     sed -i "s|range(8, 256, 8)\(.forEach(bits => testToInt(bits));\)|range(8, 240, 8)\1|" test/utils/math/SafeCast.test.js
@@ -103,6 +105,10 @@ function zeppelin_test
     force_hardhat_compiler_binary "$config_file" "$BINARY_TYPE" "$BINARY_PATH"
     force_hardhat_compiler_settings "$config_file" "$(first_word "$SELECTED_PRESETS")"
     npm install
+    # We require to install hardhat 2.20.0 due to support for evm version cancun, otherwise we get the following error:
+    # Invalid value {"blockGasLimit":10000000,"allowUnlimitedContractSize":true,"hardfork":"cancun"} for HardhatConfig.networks.hardhat - Expected a value of type HardhatNetworkConfig.
+    # See: https://github.com/NomicFoundation/hardhat/issues/4176
+    npm install [email protected]
 
     replace_version_pragmas
     for preset in $SELECTED_PRESETS; do