Move rust client directory

src/address.rs

@@ -0,0 +1,50 @@
+//! Structs for handling supported address types.
+
+use pairing::bls12_381::Bls12;
+use zcash_primitives::primitives::PaymentAddress;
+use zcash_client_backend::encoding::{decode_payment_address, decode_transparent_address};
+use zcash_primitives::legacy::TransparentAddress;
+
+use zcash_client_backend::constants::testnet::{
+    B58_PUBKEY_ADDRESS_PREFIX, B58_SCRIPT_ADDRESS_PREFIX, HRP_SAPLING_PAYMENT_ADDRESS,
+};
+
+/// An address that funds can be sent to.
+pub enum RecipientAddress {
+    Shielded(PaymentAddress<Bls12>),
+    Transparent(TransparentAddress),
+}
+
+impl From<PaymentAddress<Bls12>> for RecipientAddress {
+    fn from(addr: PaymentAddress<Bls12>) -> Self {
+        RecipientAddress::Shielded(addr)
+    }
+}
+
+impl From<TransparentAddress> for RecipientAddress {
+    fn from(addr: TransparentAddress) -> Self {
+        RecipientAddress::Transparent(addr)
+    }
+}
+
+impl RecipientAddress {
+    pub fn from_str(s: &str) -> Option<Self> {
+        // Try to match a sapling z address 
+        if let Some(pa) = match decode_payment_address(HRP_SAPLING_PAYMENT_ADDRESS, s) {
+                                Ok(ret) => ret,
+                                Err(_)  => None
+                            } 
+        {
+            Some(RecipientAddress::Shielded(pa))    // Matched a shielded address
+        } else if let Some(addr) = match decode_transparent_address(
+                                            &B58_PUBKEY_ADDRESS_PREFIX, &B58_SCRIPT_ADDRESS_PREFIX, s) {
+                                        Ok(ret) => ret,
+                                        Err(_)  => None
+                                    } 
+        {
+            Some(RecipientAddress::Transparent(addr))   // Matched a transparent address
+        } else {
+            None    // Didn't match anything
+        }
+    }
+}