check ingress fee precision

include/evm_runtime/types.hpp

@@ -16,11 +16,7 @@ namespace evm_runtime {
    static constexpr uint64_t gas_sset_min = 2900;
    static constexpr uint64_t grace_period_seconds = 180;
 
-   constexpr uint64_t pow10_const(int v) {
-      uint64_t r = 1;
-      while (v-- > 0) r *= 10;
-      return r;
-   }
+   uint64_t pow10_const(int v);
 
    constexpr unsigned evm_precision = 18;
    constexpr eosio::name default_token_account = "eosio.token"_n;

src/config_wrapper.cpp

@@ -71,6 +71,7 @@ const eosio::asset& config_wrapper::get_ingress_bridge_fee()const {
 }
 
 void config_wrapper::set_ingress_bridge_fee(const eosio::asset& ingress_bridge_fee) {
+    eosio::check(evm_precision >= ingress_bridge_fee.symbol.precision(), "invalid ingress fee precision");
     _cached_config.ingress_bridge_fee = ingress_bridge_fee;
     set_dirty();
 }
@@ -212,7 +213,7 @@ void config_wrapper::set_fee_parameters(const fee_parameters& fee_params,
         }
         eosio::check(fee_params.ingress_bridge_fee->amount >= 0, "ingress bridge fee cannot be negative");
 
-        _cached_config.ingress_bridge_fee = *fee_params.ingress_bridge_fee;
+        set_ingress_bridge_fee(*fee_params.ingress_bridge_fee);
     } else {
         eosio::check(allow_any_to_be_unspecified, "All required fee parameters not specified: missing ingress_bridge_fee");
     }

src/utils.cpp

@@ -61,4 +61,11 @@ uint256 to_uint256(const bytes& value) {
     return intx::be::load<uint256>(tmp);
 }
 
+uint64_t pow10_const(int v) {
+    eosio::check(v >= 0, "invalid exponent");
+    uint64_t r = 1;
+    while (v-- > 0) r *= 10;
+    return r;
+}
+
 }  // namespace silkworm