Added 2 comments on Solana block type

proto/sf/solana/type/v1/type.proto

@@ -33,6 +33,8 @@ message Message {
     MessageHeader header = 1;
     repeated bytes account_keys = 2;
     bytes recent_blockhash = 3;
+    // Top-level instructions
+    // T instructions (?)
     repeated CompiledInstruction instructions = 4;
     bool versioned = 5;
     repeated MessageAddressTableLookup address_table_lookups = 6;
@@ -55,6 +57,9 @@ message TransactionStatusMeta {
     uint64 fee = 2;
     repeated uint64 pre_balances = 3;
     repeated uint64 post_balances = 4;
+    // InnerInstructions are instructions made to external programs as part of the transaction.
+    //
+    // Count == len(I)
     repeated InnerInstructions inner_instructions = 5;
 //    bool inner_instructions_none = 10;
     repeated string log_messages = 6;