Add IsCurrencyWhitelisted to BlockContext

celo-org · Nov 6, 2023 · 91135bf · 91135bf
1 parent 3bef935
commit 91135bf
Showing 1 changed file with 10 additions and 0 deletions.
diff --git a/core/vm/evm.go b/core/vm/evm.go
@@ -96,6 +96,16 @@ type BlockContext struct {
 	ExchangeRates map[common.Address]*big.Rat
 }
 
+func (bc BlockContext) IsCurrencyWhitelisted(feeCurrency *common.Address) bool {
+	if feeCurrency == nil {
+		return true
+	}
+
+	// Check if fee currency is registered
+	_, ok := bc.ExchangeRates[*feeCurrency]
+	return ok
+}
+
 // TxContext provides the EVM with information about a transaction.
 // All fields can change between transactions.
 type TxContext struct {