feat: Waku v2 bridge

Issue #12610

vendor/github.com/ladydascalie/currency/README.md

@@ -0,0 +1,29 @@
+# currency
+
+This package generates structs containing all the up-to-date `ISO4217` currency codes and minor units, along with a very simple validator.
+
+Data is graciously provided by:
+
+- [International Organization for Standardization](https://www.iso.org/iso-4217-currency-codes.html)
+- [Currency Code Services – ISO 4217 Maintenance Agency](https://www.currency-iso.org)
+
+## Usage:
+
+```
+package main
+
+func main() {
+	// Validation of codes.
+	ok := currency.Valid("ABC")
+	if !ok {
+		// whatever you need.
+	}
+
+	// easy to get the values
+	fmt.Println(currency.USD.Code())
+	// Output: USD
+
+	fmt.Println(currency.USD.MinorUnit())
+	// Output: 2
+}
+```