test: use alchemy for arbitrum URLs (#8859)

Author: DaniPopes

crates/anvil/tests/it/fork.rs

@@ -1156,7 +1156,7 @@ async fn test_arbitrum_fork_dev_balance() {
     let (api, handle) = spawn(
         fork_config()
             .with_fork_block_number(None::<u64>)
-            .with_eth_rpc_url(Some("https://arb1.arbitrum.io/rpc".to_string())),
+            .with_eth_rpc_url(Some(next_rpc_endpoint(NamedChain::Arbitrum))),
     )
     .await;
 
@@ -1174,7 +1174,7 @@ async fn test_arbitrum_fork_block_number() {
     let (_, handle) = spawn(
         fork_config()
             .with_fork_block_number(None::<u64>)
-            .with_eth_rpc_url(Some("https://arb1.arbitrum.io/rpc".to_string())),
+            .with_eth_rpc_url(Some(next_rpc_endpoint(NamedChain::Arbitrum))),
     )
     .await;
     let provider = handle.http_provider();
@@ -1186,7 +1186,7 @@ async fn test_arbitrum_fork_block_number() {
     let (api, _) = spawn(
         fork_config()
             .with_fork_block_number(Some(initial_block_number))
-            .with_eth_rpc_url(Some("https://arb1.arbitrum.io/rpc".to_string())),
+            .with_eth_rpc_url(Some(next_rpc_endpoint(NamedChain::Arbitrum))),
     )
     .await;
     let block_number = api.block_number().unwrap().to::<u64>();
@@ -1212,7 +1212,7 @@ async fn test_arbitrum_fork_block_number() {
 
     // reset fork to different block number and compare with block returned by `eth_blockNumber`
     api.anvil_reset(Some(Forking {
-        json_rpc_url: Some("https://arb1.arbitrum.io/rpc".to_string()),
+        json_rpc_url: Some(next_rpc_endpoint(NamedChain::Arbitrum)),
         block_number: Some(initial_block_number - 2),
     }))
     .await

crates/cast/src/lib.rs

@@ -1648,12 +1648,10 @@ impl SimpleCast {
     /// ```
     pub fn abi_encode(sig: &str, args: &[impl AsRef<str>]) -> Result<String> {
         let func = get_func(sig)?;
-        let calldata = match encode_function_args(&func, args) {
-            Ok(res) => hex::encode(res),
+        match encode_function_args(&func, args) {
+            Ok(res) => Ok(hex::encode_prefixed(&res[4..])),
             Err(e) => eyre::bail!("Could not ABI encode the function and arguments. Did you pass in the right types?\nError\n{}", e),
-        };
-        let encoded = &calldata[8..];
-        Ok(format!("0x{encoded}"))
+        }
     }
 
     /// Performs packed ABI encoding based off of the function signature or tuple.