Merge pull request #35 from pendulum-chain/to-base64-xdr-string-support

conversion to base64 string

src/utils/std.rs

@@ -1,4 +1,5 @@
 use crate::lib::String;
+use crate::XdrCodec;
 
 /// A trait used to convert any Stellar specific type `T` as a String
 /// This also immediately converts the standard Error to a user-defined Error `E`
@@ -9,3 +10,17 @@ use crate::lib::String;
 pub trait StellarTypeToString<T, E: From<sp_std::str::Utf8Error>> {
     fn as_encoded_string(&self) -> Result<String, E>;
 }
+
+/// A trait used to convert a structure into Base64 String
+pub trait StellarTypeToBase64String {
+    /// returns a Base64 encoded String or a vec of bytes [xdr]
+    fn as_base64_encoded_string(&self) -> String;
+}
+
+impl <T: XdrCodec> StellarTypeToBase64String for T {
+    fn as_base64_encoded_string(&self) -> String {
+        let xdr = self.to_base64_xdr();
+        // safe to use `unwrap`, since `to_base64_xdr()` will always return a valid vec of
+        String::from_utf8(xdr.clone()).unwrap()
+    }
+}