eosio.erc2o contract implementation

antelope_contracts/contracts/erc20/include/erc20/erc20.hpp

@@ -11,30 +11,112 @@ using namespace intx;
 
 namespace erc20 {
 
+checksum256 make_key(const uint8_t* ptr, size_t len) {
+    uint8_t buffer[32]={};
+    check(len <= sizeof(buffer), "len provided to make_key is too small");
+    memcpy(buffer, ptr, len);
+    return checksum256(buffer);
+}
+
+checksum256 make_key(bytes data){
+    return make_key((const uint8_t*)data.data(), data.size());
+}
+
 class [[eosio::contract]] erc20 : public contract {
    public:
     using contract::contract;
 
+   struct bridge_message_v0 {
+      eosio::name        receiver;
+      bytes              sender;
+      eosio::time_point  timestamp;
+      bytes              value;
+      bytes              data;
+
+      EOSLIB_SERIALIZE(bridge_message_v0, (receiver)(sender)(timestamp)(value)(data));
+   };
+
+   using bridge_message_t = std::variant<bridge_message_v0>;
+
     [[eosio::on_notify("*::transfer")]] void transfer(eosio::name from, eosio::name to, eosio::asset quantity, std::string memo);
 
     // evm runtime will call this to notify erc20 about the message from 'from' with 'data'.
-    [[eosio::action]] void onbridgemsg(name receiver, const bytes& sender, const time_point& timestamp, const bytes& value, const bytes& data);
-    [[eosio::action]] void init();
+    [[eosio::action]] void onbridgemsg(const bridge_message_t &message);
+    [[eosio::action]] void upgrade();
+
+    [[eosio::action]] void regtoken(eosio::name eos_contract_name, 
+    std::string evm_token_name, std::string evm_token_symbol, const eosio::asset& ingress_fee, const eosio::asset &egress_fee, uint8_t erc20_precision);
+
+    [[eosio::action]] void addegress(const std::vector<name>& accounts);
+    [[eosio::action]] void removeegress(const std::vector<name>& accounts);
+
+   uint64_t get_next_nonce();
+
+   struct nextnonce {
+      name     owner;
+      uint64_t next_nonce = 0;
 
-    struct [[eosio::table]] config
-   {
-      bytes erc20_addr;
+      uint64_t primary_key() const { return owner.value; }
+      EOSLIB_SERIALIZE(nextnonce, (owner)(next_nonce));
+   };
+
+   struct [[eosio::table("implcontract")]] impl_contract_t {
+      uint64_t       id = 0;
+      bytes          address;
+
+      uint64_t       primary_key() const {
+         return id;
+      }
+      EOSLIB_SERIALIZE(impl_contract_t, (id)(address));
+   };
+   typedef eosio::multi_index<"implcontract"_n, impl_contract_t> impl_contract_table_t;
+
+   struct [[eosio::table("tokens")]] token_t {
+      uint64_t       id = 0;
+      eosio::name    token_contract; 
+      bytes          address; // <-- proxy contract addr
+      eosio::asset   ingress_fee;
+      eosio::asset   balance; // <-- total amount in EVM side
+      eosio::asset   fee_balance;
+      int8_t         erc20_precision = 0;
 
-      EOSLIB_SERIALIZE(config, (erc20_addr));
+      uint64_t primary_key() const {
+         return id;
+      }
+      uint128_t by_contract_symbol() const {
+         uint128_t v = token_contract.value;
+         v <<= 64;
+         v |= ingress_fee.symbol.code().raw();
+         return v;
+      }
+      checksum256 by_address()const { 
+        return make_key(address);
+      }
+
+      EOSLIB_SERIALIZE(token_t, (id)(token_contract)(address)(ingress_fee)(balance)(fee_balance)(erc20_precision));
    };
+   typedef eosio::multi_index<"tokens"_n, token_t,
+      indexed_by<"by.symbol"_n, const_mem_fun<token_t, uint128_t, &token_t::by_contract_symbol> >,
+      indexed_by<"by.address"_n, const_mem_fun<token_t,  checksum256, &token_t::by_address> > 
+      > token_table_t;
+
+   struct [[eosio::table("egresslist")]] allowed_egress_account {
+      eosio::name account;
 
-   private:
+      uint64_t primary_key() const { return account.value; }
+      EOSLIB_SERIALIZE(allowed_egress_account, (account));
+   };
+   typedef eosio::multi_index<"egresslist"_n, allowed_egress_account> egresslist_table_t;
 
-    eosio::singleton<"config"_n, config> _config{get_self(), get_self().value};
-    void handle_evm_transfer(eosio::asset quantity, const std::string &memo);
+    void handle_erc20_transfer(const token_t &token, eosio::asset quantity, const std::string &memo);
 
-    void call(eosio::name from, const bytes &to, uint128_t value, const bytes &data, uint64_t gas_limit);
+    // actions defined in evm_runtime contract
+    void call(eosio::name from, const bytes &to, const bytes& value, const bytes &data, uint64_t gas_limit);
     using call_action = action_wrapper<"call"_n, &erc20::call>;
+
+    void assertnonce(eosio::name account, uint64_t next_nonce);
+    using assertnonce_action = action_wrapper<"assertnonce"_n, &erc20::assertnonce>;
+
 };
 
 }  // namespace erc20

antelope_contracts/contracts/erc20/include/erc20/types.hpp

@@ -12,13 +12,15 @@ typedef std::vector<char> bytes;
 
 constexpr size_t kAddressLength{20};
 constexpr size_t kHashLength{32};
-constexpr unsigned evm_precision = 6;
 constexpr uint64_t evm_gaslimit = 500000;
-constexpr uint64_t evm_init_gaslimit = 5000000;
-constexpr eosio::name token_account(eosio::name("tethertether"));
-constexpr eosio::symbol token_symbol("USDT", 4u);
+constexpr uint64_t evm_init_gaslimit = 10000000;
+
 constexpr eosio::name evm_account(eosio::name("eosio.evm"));
-constexpr intx::uint256 minimum_natively_representable = intx::exp(10_u256, intx::uint256(evm_precision - token_symbol.precision()));
-static_assert(evm_precision - token_symbol.precision() <= 14, "dust math may overflow a uint64_t");
+constexpr eosio::name erc2o_account(eosio::name("eosio.erc2o"));
+
+constexpr unsigned evm_precision = 18; // precision of native token(aka.EOS) in EVM side
+constexpr eosio::symbol native_token_symbol("EOS", 4u);
+constexpr intx::uint256 minimum_natively_representable = intx::exp(10_u256, intx::uint256(evm_precision - native_token_symbol.precision()));
+
 
 }  // namespace erc20