Check gas price (#494)

* add gas validation option

* gas price config for chains

* check gas price

* add tests

* fix txt

* make gas price dls

* fix config

foundation/src/main/kotlin/org/drpc/chainsconfig/ChainsConfigReader.kt

@@ -86,6 +86,7 @@ class ChainsConfigReader(
             ?: throw IllegalArgumentException("undefined shortnames for $blockchain")
         val type = getValueAsString(node, "type")
             ?: throw IllegalArgumentException("undefined type for $blockchain")
+        val gasPriceCondition = getValueAsString(node, "gas-price-condition")
         return ChainsConfig.ChainConfig(
             expectedBlockTime = expectedBlockTime,
             syncingLagSize = lags.first,
@@ -99,7 +100,8 @@ class ChainsConfigReader(
             shortNames = shortNames,
             id = id,
             blockchain = blockchain,
-            type = type
+            type = type,
+            gasPriceCondition = gasPriceCondition?.let { ChainsConfig.GasPriceCondition(gasPriceCondition) },
         )
     }