Add --rpc-max-multiple-accounts to override the getMultipleAccounts JSON RPC maximum

core/src/rpc.rs

@@ -108,6 +108,7 @@ pub struct JsonRpcConfig {
     pub health_check_slot_distance: u64,
     pub enable_bigtable_ledger_storage: bool,
     pub enable_bigtable_ledger_upload: bool,
+    pub max_multiple_accounts: Option<usize>,
 }
 
 #[derive(Clone)]
@@ -1923,10 +1924,15 @@ impl RpcSol for RpcSolImpl {
             "get_multiple_accounts rpc request received: {:?}",
             pubkey_strs.len()
         );
-        if pubkey_strs.len() > MAX_MULTIPLE_ACCOUNTS {
+
+        let max_multiple_accounts = meta
+            .config
+            .max_multiple_accounts
+            .unwrap_or(MAX_MULTIPLE_ACCOUNTS);
+        if pubkey_strs.len() > max_multiple_accounts {
             return Err(Error::invalid_params(format!(
                 "Too many inputs provided; max {}",
-                MAX_MULTIPLE_ACCOUNTS
+                max_multiple_accounts
             )));
         }
         let mut pubkeys: Vec<Pubkey> = vec![];

validator/src/main.rs

@@ -11,7 +11,7 @@ use solana_clap_utils::{
     },
     keypair::SKIP_SEED_PHRASE_VALIDATION_ARG,
 };
-use solana_client::rpc_client::RpcClient;
+use solana_client::{rpc_client::RpcClient, rpc_request::MAX_MULTIPLE_ACCOUNTS};
 use solana_core::ledger_cleanup_service::{
     DEFAULT_MAX_LEDGER_SHREDS, DEFAULT_MIN_MAX_LEDGER_SHREDS,
 };
@@ -862,6 +862,7 @@ pub fn main() {
     let default_dynamic_port_range =
         &format!("{}-{}", VALIDATOR_PORT_RANGE.0, VALIDATOR_PORT_RANGE.1);
     let default_genesis_archive_unpacked_size = &MAX_GENESIS_ARCHIVE_UNPACKED_SIZE.to_string();
+    let default_rpc_max_multiple_accounts = &MAX_MULTIPLE_ACCOUNTS.to_string();
     let default_rpc_pubsub_max_connections = PubSubConfig::default().max_connections.to_string();
     let default_rpc_pubsub_max_fragment_size =
         PubSubConfig::default().max_fragment_size.to_string();
@@ -1039,6 +1040,15 @@ pub fn main() {
                 .takes_value(false)
                 .help("Upload new confirmed blocks into a BigTable instance"),
         )
+        .arg(
+            Arg::with_name("rpc_max_multiple_accounts")
+                .long("rpc-max-multiple-accounts")
+                .value_name("MAX ACCOUNTS")
+                .takes_value(true)
+                .default_value(default_rpc_max_multiple_accounts)
+                .help("Override the default maximum accounts accepted by \
+                       the getMultipleAccounts JSON RPC method")
+        )
         .arg(
             Arg::with_name("health_check_slot_distance")
                 .long("health-check-slot-distance")
@@ -1507,6 +1517,11 @@ pub fn main() {
             faucet_addr: matches.value_of("rpc_faucet_addr").map(|address| {
                 solana_net_utils::parse_host_port(address).expect("failed to parse faucet address")
             }),
+            max_multiple_accounts: Some(value_t_or_exit!(
+                matches,
+                "rpc_max_multiple_accounts",
+                usize
+            )),
             health_check_slot_distance: value_t_or_exit!(
                 matches,
                 "health_check_slot_distance",