feat: add CLEAR_CACHE env var for ganache and hardhat

.env.example

@@ -2,5 +2,8 @@ export ETH_RPC_URL=https://eth-mainnet.alchemyapi.io/v2/yourAlchemyApiKey
 export FORK_BLOCK=13724056
 export GAS_LIMIT=30000000
 
-# skip type-checking to avoid its perfomance impact
+# clears caches for ganache and hardhat
+export CLEAR_CACHE=0
+
+# skip type-checking to avoid its performance impact
 export TS_NODE_TRANSPILE_ONLY=1

README.md

@@ -18,4 +18,5 @@ uses about 16M gas and performs a number of token transfers
 
 ## Tips
 
-Dapptools seems to fail when run on macOS, as explained in [this](https://github.com/dapphub/dapptools/issues/876), so you may need to skip that script on macOS
+- Dapptools seems to fail when run on macOS, as explained in [this](https://github.com/dapphub/dapptools/issues/876), so you may need to skip that script on macOS
+- Set `export CLEAR_CACHE=1` in your `.env` file to clear the Ganache and Hardhat caches

scripts/benchmark-hardhat.sh

@@ -1,3 +1,7 @@
 . ./.env
 
+if [ $CLEAR_CACHE = 1 ]; then
+  yarn hardhat clean
+fi
+
 time TS_NODE_FILES=true yarn ts-node ./scripts/convex.hardhat.ts

scripts/convex.ganache.ts

@@ -4,8 +4,8 @@ const chalk: any = require('chalk');
 import * as ethers from 'ethers';
 import Ganache from 'ganache';
 
-const url = process.env['ETH_RPC_URL'] || 'mainnet';
-const deleteCache = !!(process.env['DELETE_CACHE'] && process.env['DELETE_CACHE'] !== 'false');
+const url = process.env.ETH_RPC_URL || 'mainnet';
+const deleteCache = process.env.CLEAR_CACHE && Number(process.env.CLEAR_CACHE) === 1;
 const blockGasLimit = ethers.BigNumber.from(process.env.GAS_LIMIT).toHexString();
 const blockNumber = Number(process.env.FORK_BLOCK);
 const defaultBalance = '0xffffffffffffffffffffff';