From 8b84459e8ca881e41a248881c071c6cfbf62cfe7 Mon Sep 17 00:00:00 2001
From: sierra19XX <815557-sierra19XX@users.noreply.gitlab.com>
Date: Tue, 29 Jun 2021 11:24:07 +0000
Subject: [PATCH] Reserve popular tokens

---
 libraries/chain/asset_evaluator.cpp           |  5 +++--
 libraries/chain/db_getter.cpp                 | 21 +++++++++++++++++++
 .../chain/include/graphene/chain/database.hpp |  1 +
 3 files changed, 25 insertions(+), 2 deletions(-)

diff --git a/libraries/chain/asset_evaluator.cpp b/libraries/chain/asset_evaluator.cpp
index 1ffcf3bc..0591da54 100644
--- a/libraries/chain/asset_evaluator.cpp
+++ b/libraries/chain/asset_evaluator.cpp
@@ -42,8 +42,7 @@ void_result asset_create_evaluator::do_evaluate( const asset_create_operation& o
 
    database& d = db();
 
-   if (d.head_block_time() < HARDFORK_SON_TIME)
-      FC_ASSERT(op.symbol != "BTC", "BTC asset creation before SON hardfork");
+   FC_ASSERT(d.is_asset_creation_allowed(op.symbol), "Asset creation not allowed at current time");
 
    const auto& chain_parameters = d.get_global_properties().parameters;
    FC_ASSERT( op.common_options.whitelist_authorities.size() <= chain_parameters.maximum_asset_whitelist_authorities );
@@ -191,6 +190,8 @@ void_result lottery_asset_create_evaluator::do_evaluate( const lottery_asset_cre
 
    database& d = db();
 
+   FC_ASSERT(d.is_asset_creation_allowed(op.symbol), "Lottery asset creation not allowed at current time");
+
    const auto& chain_parameters = d.get_global_properties().parameters;
    FC_ASSERT( op.common_options.whitelist_authorities.size() <= chain_parameters.maximum_asset_whitelist_authorities );
    FC_ASSERT( op.common_options.blacklist_authorities.size() <= chain_parameters.maximum_asset_whitelist_authorities );
diff --git a/libraries/chain/db_getter.cpp b/libraries/chain/db_getter.cpp
index cb7e1bc0..cb0cdc17 100644
--- a/libraries/chain/db_getter.cpp
+++ b/libraries/chain/db_getter.cpp
@@ -315,6 +315,27 @@ bool database::is_son_active( son_id_type son_id )
    return (it_son != active_son_ids.end());
 }
 
+bool database::is_asset_creation_allowed(const string &symbol)
+{
+   time_point_sec now = head_block_time();
+   std::unordered_set<std::string> post_son_hf_symbols = {"ETH", "USDT", "BNB", "ADA", "DOGE", "XRP", "USDC", "DOT", "UNI", "BUSD", "BCH", "LTC", "SOL", "LINK", "MATIC", "THETA",
+                                                          "WBTC", "XLM", "ICP", "DAI", "VET", "ETC", "TRX", "FIL", "XMR", "EGR", "EOS", "SHIB", "AAVE", "CRO", "ALGO", "AMP", "BTCB",
+                                                          "BSV", "KLAY", "CAKE", "FTT", "LEO", "XTZ", "TFUEL", "MIOTA", "LUNA", "NEO", "ATOM", "MKR", "FEI", "WBNB", "UST", "AVAX",
+                                                          "STEEM", "HIVE", "HBD", "SBD", "BTS"};
+   if (symbol == "BTC")
+   {
+      if (now < HARDFORK_SON_TIME)
+         return false;
+   }
+
+   if (post_son_hf_symbols.find(symbol) != post_son_hf_symbols.end())
+   {
+      if (now >= HARDFORK_SON_TIME)
+         return false;
+   }
+   return true;
+}
+
 vector<uint64_t> database::get_random_numbers(uint64_t minimum, uint64_t maximum, uint64_t selections, bool duplicates)
 {
    FC_ASSERT( selections <= 100000 );
diff --git a/libraries/chain/include/graphene/chain/database.hpp b/libraries/chain/include/graphene/chain/database.hpp
index 9e154347..50975174 100644
--- a/libraries/chain/include/graphene/chain/database.hpp
+++ b/libraries/chain/include/graphene/chain/database.hpp
@@ -312,6 +312,7 @@ namespace graphene { namespace chain {
          signed_transaction                     create_signed_transaction( const fc::ecc::private_key& signing_private_key, const operation& op );
          bool                                   is_son_dereg_valid( son_id_type son_id );
          bool                                   is_son_active( son_id_type son_id );
+         bool                                   is_asset_creation_allowed(const string& symbol);
 
          time_point_sec   head_block_time()const;
          uint32_t         head_block_num()const;