Update rpc/getAccountInfo.go

Co-authored-by: Sonic <sonic.from.new.yoke@gmail.com>

Author: cloakd

rpc/getAccountInfo.go

@@ -86,7 +86,19 @@ type GetAccountInfoOpts struct {
 	// This parameter is optional.
 	MinContextSlot *uint64
 
-	// Return only if the account(s) have changed since this slot
+    // ChangedSinceSlot, if set, asks the RPC node to return account data only
+    // when it has changed since the given slot. Useful for incremental sync of
+    // large programs (e.g. PumpFun) where a full getProgramAccounts is no longer
+    // feasible.
+    //
+    // NOTE: This is NOT part of the official Solana JSON-RPC specification
+    // (https://solana.com/docs/rpc/http). It is a non-standard extension
+    // supported by some commercial RPC providers (e.g. Helius, FluxRPC).
+    // Public RPC endpoints and stock agave-validator nodes will ignore this
+    // field or reject the request. Verify support with your provider before
+    // using.
+    //
+    // This parameter is optional.
 	ChangedSinceSlot *uint64 `json:"changedSinceSlot,omitempty"`
 }