fix: swap default mainnet RPC URL (#227)

Author: mds1

foundry.toml

@@ -2,10 +2,10 @@
 fs_permissions = [{ access = "read-write", path = "./"}]
 
 [rpc_endpoints]
-# The RPC URLs below match the StdChains URLs but append a trailing slash for testing.
-mainnet = "https://api.mycryptoapi.com/eth/"
-optimism_goerli = "https://goerli.optimism.io/"
-arbitrum_one_goerli = "https://goerli-rollup.arbitrum.io/rpc/"
+# The RPC URLs are modified versions of the default for testing initialization.
+mainnet = "https://mainnet.infura.io/v3/7a8769b798b642f6933f2ed52042bd70" # Different API key.
+optimism_goerli = "https://goerli.optimism.io/" # Adds a trailing slash.
+arbitrum_one_goerli = "https://goerli-rollup.arbitrum.io/rpc/" # Adds a trailing slash.
 
 [fmt]
 # These are all the `forge fmt` defaults.

src/StdCheats.sol

@@ -210,7 +210,7 @@ abstract contract StdCheatsSafe {
         // Initialize `stdChains` with the defaults.
         stdChains["anvil"] = Chain("Anvil", 31337, "http://127.0.0.1:8545");
         stdChains["hardhat"] = Chain("Hardhat", 31337, "http://127.0.0.1:8545");
-        stdChains["mainnet"] = Chain("Mainnet", 1, "https://api.mycryptoapi.com/eth");
+        stdChains["mainnet"] = Chain("Mainnet", 1, "https://mainnet.infura.io/v3/6770454bc6ea42c58aac12978531b93f");
         stdChains["goerli"] = Chain("Goerli", 5, "https://goerli.infura.io/v3/6770454bc6ea42c58aac12978531b93f");
         stdChains["sepolia"] = Chain("Sepolia", 11155111, "https://rpc.sepolia.dev");
         stdChains["optimism"] = Chain("Optimism", 10, "https://mainnet.optimism.io");

test/StdCheats.t.sol

@@ -229,7 +229,7 @@ contract StdCheatsTest is Test {
 
     function testChainRpcInitialization() public {
         // RPCs specified in `foundry.toml` should be updated.
-        assertEq(stdChains["mainnet"].rpcUrl, "https://api.mycryptoapi.com/eth/");
+        assertEq(stdChains["mainnet"].rpcUrl, "https://mainnet.infura.io/v3/7a8769b798b642f6933f2ed52042bd70");
         assertEq(stdChains["optimism_goerli"].rpcUrl, "https://goerli.optimism.io/");
         assertEq(stdChains["arbitrum_one_goerli"].rpcUrl, "https://goerli-rollup.arbitrum.io/rpc/");